Entries |
Document | Title | Date |
20080240726 | Phase coded non-return-to-zero optical transmitter - Embodiments of the present invention provide a method and apparatus for producing a phase coded non-return-to-zero (PC-NRZ) optical signal. The method includes providing an input optical signal; providing first and second drive signals, the first drive signal having a first data pattern of first and second signal levels, the second drive signal having a second data pattern, the second data pattern having third and fourth signal levels that toggle at least when the first drive signal changes from the first signal level to the second signal level; and modulating amplitude of the input optical signal with the first drive signal and modulating phase of the input optical signal with the second drive signal to produce the PC-NRZ optical signal. A PC-NRZ optical transmitter and an optical transmission system applying the PC-NRZ optical transmitter are also provided. | 10-02-2008 |
20080267635 | QUANTUM CRYPTOGRAPHY COMMUNICATION APPARATUS AND COMMUNICATION TERMINAL - In a quantum cryptography communication apparatus, a light pulse is generated by a light source and split into a signal light pulse and a reference light pulse on a receiving side. The signal light pulse and the reference light pulse are transmitted to a sending side via a communication channel. On the sending side, the received reference light is passed through a first optical path and phase-modulated by a randomly selected amount. Communication information is acquired on the basis of the reference light passed through the first optical path and the signal light passed via a second optical path. Frequencies of the signal light pulse and the reference light pulse are shifted. The intensity of the signal light pulses is attenuated and phase-modulated by an amount corresponding to the communication information. The resultant signal light pulse and the reference light pulse are returned back to the receiving side. | 10-30-2008 |
20080285980 | Eye Safety Mechanism for Use in Optical Cable with Electrical Interfaces - An eye safety mechanism for use with a bi-directional data cable having an electrical interface at least one (but potentially both) ends, despite the fact that the cable communicates over much of its length using a bi-directional optical channel. Upon power-up, the eye safety mechanism determines whether or not a loss of signal condition is present on an optical receive channel of the bi-directional data cable. If the loss of signal is present, the mechanism intermittently disables the optical transmit channel of the bi-directional data cable. On the other hand, if the loss of signal is not present, the mechanism enables the optical transmit channel of the bi-directional data cable without intermittently disabling transmission at least for most of the time until the next time a loss of signal is detected on the optical receive channel. | 11-20-2008 |
20090034983 | OPTICAL TRANSMITTER-RECEIVER SUBASSEMBLY AND OPTICAL TRANSMITTER-RECEIVER MODULE - An optical transmitter-receiver subassembly including a light-emitting element which converts a current into an output optical signal, a light-receiving element which converts an input optical signal from an optical fiber into a current, a planar lightwave circuit which guides the output optical signal and the input optical signal, and comprises the light-emitting element and the light-receiving element, a first land pad through which the current to be input to the light-emitting element passes, a second land pad through which the current output from the light-receiving element passes, a package which is electrically coupled to the planar lightwave circuit and includes the first land pad and the second land pad. | 02-05-2009 |
20090060522 | PARALLEL HIGH-SPEED COMMUNICATION LINKS WITH REDUNDANT CHANNEL ARCHITECTURES - An optical transmission system includes more optical channels than electrical channels. If an optical channel is not functioning, the signals may be diverted to another optical channel since there are more optical channels than electrical channels. Embodiments of the present invention also relate to switches for switching the electrical channels to particular optical channels on either or both of the transmission and reception side. The switches include switching elements and selector elements for routing the electrical signals between the electrical channels and optical channels. In one embodiment, the multiple optical channels are incorporated into a single cable. The single cable may have the electrical interface for a number of electrical channels exposed for mechanical and electrical coupling with an external port, whereas the optical channels may be hidden within the cable coating. | 03-05-2009 |
20090080900 | ENVIRONMENTALLY STABLE COMPONENT ASSEMBLY - Component assemblies and methods of making component assemblies are disclosed. An exemplary component assembly may generally include a capsule defining a cavity for receiving a component. The component assembly may additionally include at least one lead extending from the component and through the capsule to allow communication between the component and a network or device. The lead may generally define a sealed length within the capsule that is at least as great as a predetermined or expected intrusion distance of an external contaminant along the sealed length over an expected lifetime or service interval associated with the component encapsulated in the cavity. | 03-26-2009 |
20090092400 | LIGHT SOURCE IN OPTICAL TRANSMISSION SYSTEM, WAVEFORM SHAPER, OPTICAL PULSE TRAIN GENERATOR AND OPTICAL REPRODUCTION SYSTEM - The present invention provides a pulse train generator comprising: a dual-frequency signal light source for generating a dual-frequency signal; a soliton shaper for soliton-shaping output light from the dual-frequency signal light source; and an adiabatic soliton compressor for performing adiabatic soliton compression on output light from the soliton shaper, and also provides a waveform shaper used in this pulse train generator, including a plurality of highly nonlinear optical transmission lines and a plurality of low-nonlinearity optical transmission lines which has a nonlinearity coefficient lower than that of the plurality of highly nonlinear optical transmission lines and which has a second-order dispersion value of which an absolute value is different from that of the plurality of highly nonlinear optical transmission lines. Further, the present invention provides a light source comprising a plurality of continuous light sources of which at least one oscillates in a multimode; a multiplexer for multiplexing output light from the continuous light sources; and a nonlinear phenomenon producer for producing a nonlinear phenomenon on output light from the multiplexer so as to suppress SBS (Stimulated Brillouin Scattering). | 04-09-2009 |
20090136237 | Coupling structure for optical fibres and process for making it - A coupling structure for coupling optical radiation, i.e., light, between an optical fibre and an optical device, e.g., a laser diode or a photodiode. The coupling structure has an optical through-via which guides the optical radiation to or from the optical fibre. Light exiting the fibre travels through a guidance channel so it remains substantially confined to a narrow optical path that mimics the fibre core. Conversely, light enters the fibre after having traveled through the guidance channel. The guidance channel has a first core region, the “channel core”, having first refractive index surrounded by a second region, the “channel cladding” having a second refractive index smaller than the first refractive index. The coupling structure, including the guidance channel, is preferably made of semiconductor-based material, more preferably of silicon-based material. The guidance channel is preferably silicon oxide. The coupling structure further has a fibre drive-in element, which facilitates insertion and alignment of the optical fibre to the guidance channel. | 05-28-2009 |
20090136238 | Security over an optical fiber link - An apparatus includes an optical transmitter having a first dynamically reconfigurable optical filter, an optical receiver having a second dynamically reconfigurable optical filter. The optical transmitter and optical receive are connected via an optical fiber transmission line. The optical filters are configured to function in a complementary manner. | 05-28-2009 |
20090154936 | Machine with optical communication from a first machine part to a second machine part which rotates relative to the first machine part - To enable signals to be transmitted from a fixed machine part to a machine part opposite same which rotates on a hollow shaft or vice versa, light must be able to be transmitted or received over the entire circumference. This is achieved by using an optical waveguide which, unlike conventional optical waveguides, is designed to couple out some of the light passing through it and, conversely, to allow light to enter, at any locations on its circumference. | 06-18-2009 |
20090175627 | DATA TRANSMISSION SYSTEM USING OPTICAL FIBER - A data transmission system using an optical fiber includes an optical fiber, a first light-emitting device, a second light-emitting device, a first photo-detecting device and a second photo-detecting device. Each of the first light-emitting device and the second light-emitting device is optically coupled to the input facet of the optical fiber, respectively. Each of the first photo-detecting device and the second photo-detecting device is optically coupled to the output facet of the optical fiber, respectively. In particular, the first light-emitting device and the second light-emitting device are packaged into a first optical subassembly, and the first photo-detecting device and the second photo-detecting device are packaged into a second optical subassembly. | 07-09-2009 |
20090175628 | OPTICAL AMPLIFIER CAPABLE OF AMPLIFYING OPTICAL SIGNALS THAT TRAVERSE SEPARATE TRANSMISSION FIBERS - Optical amplification by combining two or more optical signals from separate optical fibers, amplifying the combined signal using an optical fiber, and separating the amplified signals into their constituent optical signals. The separated optical signals may then be sent further in the direction they had been heading before combination. This allows multiple optical signals to be amplified using a single optical amplifier, perhaps even in a single optical fiber. Although not required, the two optical signals may even be travelling in different directions. | 07-09-2009 |
20090208223 | FOUR WAVE MIXING SUPPRESSION - Methods, systems and computer program products for countering the effects of four wave mixing are described. In one implementation, a controller can be used to shift an operating wavelength of an optical transmitter away from a zero-dispersion wavelength through which signals of the optical transmitter are transmitted. The controller can perform the shifting process while allowing sufficient margin for division multiplexing and minimal dispersion. The controller may determine an appropriate offset to be used for shifting the operating wavelength without subjecting the signals to a significant increase in undesirable effects such as dispersion, crosstalk and signal distortion which can impact the overall bit-error rate. | 08-20-2009 |
20090208224 | OPTICAL FIELD RECEIVER, OPTICAL MULTILEVEL SIGNAL RECEIVER, AND OPTICAL TRANSMISSION SYSTEM - An optical field receiver comprises an optical branching circuit for branching a received optical multilevel signal into first and second optical signals, a first optical delayed demodulator for performing delayed demodulation on the first optical signal at a delay time T (T=symbol time), a second optical delayed demodulator for performing delayed demodulation on the second optical signal at the delay time T with an optical phase difference deviating from the first optical delayed demodulator by 90°, first and second optical receivers for converting each of the delayed demodulation signals representing x and y components of complex signals output from the first and second delayed demodulators into first and second electrical signals, and a field processing unit fort generating a first reconstructed signal representing an inter-symbol phase difference or a phase angle of a received symbol from the first and second electrical signals for each symbol time T. | 08-20-2009 |
20090220246 | OPTICAL RECEIVER AND A FREE-SPACE OPTICAL COMMUNICATIONS USING THE SAME - A device for phase distortion compensation across an optical beam is provided. The device is a part of an optical receiver, which can be used in free space optical communications, remote sensing, optical imaging and others. 2 | 09-03-2009 |
20090220247 | Rotating Data Transmission Device with Active Compensation of Transmission Function - A rotating data transmission device for transmitting data from a data source to a data sink between a rotating part and a stationary part comprises a transmitting conductor arrangement which is fed from a transmitter means, and also a receiver means which taps signals from the transmitting conductor arrangement with the aid of a receiving coupler arrangement. The connection between data source and rotating data transmission device, or rotating data transmission device and data sink, is effected by means of light-waveguides. The receivers of the light-waveguides are linear receivers followed by equalizers for correcting the frequency and phase response. | 09-03-2009 |
20090238576 | CHANGING HARDWARE SETTINGS BASED ON DATA PREAMBLE - The present invention provides a new and unique method and apparatus for a new data speed switching scheme for a wired data interface. The method features receiving high-speed serial data over a physical link using a first coding scheme in a receiver; receiving a transmission mode change signal transmitted with sequential information about a change in a data transmission mode of the receiver using a second coding scheme and switching the data transmission mode of the receiver in response thereto. The data transmission modes may include at least one low-power mode where no data transmission is possible and the receiver is powered down. The at least one low-power mode may include two different power down states, each having different wake-up times. The data transmission modes may also include at least one high speed mode where data transmission is possible and the receiver is on. The at least one high speed mode may include several high speed modes, each having different data transmission rates. | 09-24-2009 |
20090238577 | OPTICAL MODULE AND DATA COMMUNICATION SYSTEM INCLUDING THE OPTICAL MODULE - An optical module includes a fiber array, a laser diode array, a photodiode array and a micro-lens array. The fiber array includes optical fibers which are divided to a transmitter group and a receiver group. The laser diode array includes laser diodes which are grouped in a transmitter group. The photodiode array includes photodiodes which are divided to a monitor group and a receiver group. The laser diode array is provided between the fiber array and the photodiode array. The optical fibers of the transmitter group are optically aligned with the laser diodes of the transmitter group, respectively. The micro-lens array is provided between the laser diode array and the photodiode array, and optically aligns the laser diodes of the transmitter group and the optical fibers of the receiver group with the photodiodes of the monitor group and the photodiodes of the receiver group, respectively. | 09-24-2009 |
20090245808 | METHOD AND SYSTEM FOR INTER-CHIP COMMUNICATION VIA INTEGRATED CIRCUIT PACKAGE WAVEGUIDES - Methods and systems for inter-chip communication via integrated circuit package waveguides are disclosed and may include communicating one or more signals between or among a plurality of integrated circuits via one or more waveguides integrated in a multi-layer package. The integrated circuits may be bonded to the multi-layer package. The waveguides may be configured via switches in the integrated circuits or by MEMS switches integrated in the multi-layer package. The signals may include a microwave signal and a low frequency control signal that may configure the microwave signal. The low frequency control signal may include a digital signal. The waveguides may comprise metal and/or semiconductor layers deposited on and/or embedded within the multi-layer package. | 10-01-2009 |
20090279899 | NON-CONTACT TRANSMISSION OF OPTICAL SIGNALS - The present embodiments relate to non-contact transmission of optical signals by an optical waveguide which is provided with a material of which the electron arrangement is able to be put into population inversion. In a first variant, energy is fed to the optical waveguide so that the electron arrangement is held in a state above its thermal equilibrium and below the population inversion, with optical signals being beamed into the optical waveguide with a wavelength exciting the electrons of the inversion material such that a local population inversion is created in a section of the optical waveguide, and subsequently light which is created by spontaneous emission is detected. In a second variant, a local population inversion is created by pump light, with simultaneously optical signals being beamed into the population-inverted section with the emission wavelength and by light created by stimulated emission being detected. In a third variant, light with emission wavelength is beamed into the optical waveguide, the optical signals beamed in with excitation wavelength and the light created by stimulated emission detected. | 11-12-2009 |
20090324240 | TRANSMISSION LINE OPTIMIZATION METHOD IN OPTICAL COMMUNICATION SYSTEM - In an optical communication system in which an optical signal is sequentially transferred through a plurality of transmission sections of an entire transmission line between a most upstream node and a most downstream node, wherein the entire transmission line is sectioned by at least one intermediate node into the transmission sections, a transmission line optimization method includes: concurrently transmitting a test signal from an upstream node of each transmission section to a downstream node thereof, causing each downstream node to perform individual optimization of a corresponding transmission section in parallel; sequentially transmitting a first signal indicating completion of upstream individual optimization in a downstream direction from a most upstream immediate node to most downstream node through immediate nodes which has completed the individual optimization; and transmitting a second signal indicating completion of entire optimization in an upstream direction from the most downstream node to the most upstream node. | 12-31-2009 |
20090324241 | Chio to chip optic alleys and method - A data link includes an ASIC. The data link includes a heat insulation layer in contact with the ASIC. The data link includes an optical transducer layer having a plurality of transducers, with each transducer of the plurality of transducers in communication with the ASIC. Each transducer converting optical signals to electrical signals or electrical signals to optical signals. The data link includes an optical waveguide layer having a plurality of waveguides for carrying optical signals. Each waveguide of the plurality of waveguides in optical communication with a transducer, the optical waveguide layer adjacent with the insulation layer. An apparatus for data. A method for transferring data. | 12-31-2009 |
20100003033 | Transmission of Audio Signals Via Fibre Optic - A system received an analogue electrical signal having content between 20 Hz and 20 kHz representing an analogue audio signal; amplitude modulates the analogue electrical signal onto an optical signal; transmits the modulated optical signal over an optical waveguide; receives. The modulated optical signal; and demodulates the modulated optical signal to reproduce the analogue electrical signal. The system may be incorporated within a cable arrangement. | 01-07-2010 |
20100008676 | Communication Light Detecting Device - A communication light detecting device interconnecting light transmission paths and collocated therebetween, comprises: an optical coupling body including a core portion for photo coupling with the light transmission paths, and a light extracting portion for extracting a part of the communication light as a leakage light; and a light detecting portion having a light receiving member for receiving the leakage light. The light extracting portion is preferable to possess a lower refractive index than that of the core portion. Besides, the light extracting portion is preferable to include a light detecting use groove with a groove width of 50 μm or more and 140 μm or less formed by cutting and separating the core portion. Besides, the light extracting portion is preferable to be the optical coupling body in which outer diameter of the core portion is different from the outer diameter of a core of the light transmission path. | 01-14-2010 |
20100021177 | System And Method For Imaging Objects Through Turbid Media - A method for imaging objects through turbid media includes generating a repetitive pulsed light beam under control of a pulse shaper, propagating the light beam through turbid media, and receiving and imaging the light beam at a sensor. Propagation through turbid media causes scattering of the light, and the sensor captures scattered pulses to produce an image. The pulse shaper controls pulse width, frequency, repetition rate and chirp of the generated light pulses according to a feedback signal received from the sensor, to improve image quality. A system for imaging objects through turbid media includes a laser for generating a light beam; a pulse shaper for controlling said light beam, and a sensor, in communication with the pulse shaper, for capturing the image of said light beam through a turbid medium. Pulse width is less than 250 femtoseconds to reduce attenuation of the light beam through the turbid medium. | 01-28-2010 |
20100028017 | OPTICAL AND ELECTRIC SIGNALS TRANSMISSION APPARATUS, OPTICAL AND ELECTRIC SIGNALS TRANSMISSION SYSTEM, AND ELECTRONIC EQUIPMENT USING SUCH A SYSTEM - An optical and electric signals transmission apparatus includes a receptacle having a light-receiving element and/or a light-receiving element and electrical connecting terminals, a plug having electrical connecting terminals to establish electrical coupling with the receptacle and optical coupling with the light-emitting element and/or the light-receiving element, an electric signal transmission line, and an optical signal transmission line. The receptacle has a fitting recess, and when the plug is fitted in the fitting recess in a direction substantially perpendicular to the optical axis of the light-emitting element or the light-receiving element, the optical coupling, the electrical coupling, and engagement of the receptacle with the plug are established at a location where the fitting recess and the plug are adjacent to each other. | 02-04-2010 |
20100028018 | Free-Space Optical Interconnect With Asymmetric Light Pipes - An optical interconnect system includes components such as circuit boards, server blades, or a backplane with respective light pipes for an optical signal. The light pipe in a component transmitting the optical signal receives a collimated beam and directs the collimated beam for transmission. The light pipe in a receiving component is nominally aligned with the light pipe pf the transmitting component and separated from the first light pipe by free space. The light pipe on the receiving side is larger than the light pipe on the transmitting side and can therefore accommodate an expected alignment error. | 02-04-2010 |
20100028019 | DISPLAY SYSTEM, CONTROL MODULE AND DISPLAY APPARATUS - The present invention provides a display system. The display system includes a control module, a display apparatus and an optical fiber module. The control module is used to process images and includes a first electrical-to-optical transducer unit for generating a forward light signal according to a digital image signal. The display apparatus is used to display images and includes a first optical-to-electrical transducer unit for transducing the light signal into a scaled image signal. The optical fiber module is coupled to the first electrical-to-optical transducer unit and the first optical-to-electrical transducer unit and is disposed between the control module and the display apparatus that are separated from each other for transmitting the forward light signal from the first electrical-to-optical transducer unit to the first optical-to-electrical transducer unit | 02-04-2010 |
20100040378 | NON-CONTACT CONNECTOR - With the light-emitting side focal point F | 02-18-2010 |
20100040379 | Rotary joint - A rotary transmitter having a first light-conducting hollow body, at least one transmitter for generating at least one optical signal and at least one receiver for receiving the optical signal is disclosed. The optical signal is transmitted from the transmitter to the receiver via the first light-conducting hollow body. | 02-18-2010 |
20100074626 | SYSTEM AND METHOD FOR SIGNAL EXTRACTION BY PATH MODULATION - A system includes a transmitter is configured to transmit an electromagnetic signal to a receiver, which is configured to receive the electromagnetic signal and another electromagnetic signal for mixing therewith. Propagation paths of the signals to the transmitter and receiver include a first propagation path of the electromagnetic signal to the transmitter, and a second propagation path of the other electromagnetic signal to the receiver. The arrangement, which is located along either or each of the propagation paths of signals to the transmitter and receiver, is configured to alter the length of a respective propagation path. And the processor configured to recover an amplitude and phase of the transmitted electromagnetic signal, including being configured to receive a sequence of samples of the received electromagnetic signal, and Discrete Fourier Transformation process the sequence of samples. | 03-25-2010 |
20100098429 | MULTI-APERTURE OPTICAL DETECTOR AND OPTICAL SIGNAL DETECTING CIRCUIT COMPRISING THE SAME - Provided are a multi-aperture optical detector that can address structural problems such as a complex signal wiring in array type optical detectors, and a need for a plurality of low noise amplifiers, signal to noise ratio detectors, etc., and an optical signal detecting circuit including the multi-aperture optical detector. The multi-aperture optical detector includes transmission lines having two output terminals; and a plurality of unit optical detectors which respectively have random polarities through the transmission lines and are connected in parallel, and optical signals from each of the unit optical detectors are added and output through the two output terminals. The multi-aperture optical detector has a high operation band width and can detect optical signals with a high sensitivity by connecting a plurality of unit optical detectors that respectively have a low optical detecting sensitivity and are physically compact and small. | 04-22-2010 |
20100119236 | OPTICAL TRANSMISSION MODULE AND ELECTRONIC DEVICE - A light transmission module has a light transmitting unit having a light emitting portion for outputting an optical signal corresponding to a data signal input as an electrical signal, and a first power supply controller for controlling a drive power supply of the light emitting portion, a light transmission path for transmitting the optical signal introduced from the light transmitting unit, a light receiving unit having a light receiving portion for receiving the optical signal output from the light transmission path and outputting an electrical signal corresponding to the optical signal, and a second power supply controller for controlling a drive power supply of the light receiving portion, and at least one electrical transmission path, connecting the light transmitting unit and the light receiving unit, for transmitting a control signal for controlling power supply to the light emitting portion and the light receiving portion to the first power supply controller and the second power supply controller. The first power supply controller and the second power supply controller control the power supply to the light emitting portion and the light receiving portion based on the control signal input via the electrical transmission path. | 05-13-2010 |
20100129085 | PLASMONIC SYSTEMS AND DEVICES UTILIZING SURFACE PLASMON POLARITON - Plasmonic systems and devices that utilize surface plasmon polaritons (or “plasmons”) for inter-chip and/or intra-chip communications are provided. A plasmonic system includes a microchip that has an integrated circuit module and a plasmonic device configured to interface with the integrated circuit module. The plasmonic device includes a first electrode, a second electrode positioned at a non-contact distance from the first electrode, and a tunneling-junction configured to create a plasmon when a potential difference is created between the first electrode and the second electrode. | 05-27-2010 |
20100150570 | System And Method For Optoelectrical Communication - A system for optoelectrical communication includes a transmitter configured to transmit optical signals. It also includes a pluggable form factor module. The module includes an input port, an output port, and a receiver configured to convert optical signals received at the input port into electrical signals. The system further includes an optoelectrical connector coupled to the module and the transmitter. The connector includes an embedded fiber coupled to the transmitter and configured to transmit the optical signals from the transmitter to the output port of the module. The connector also includes electrical contacts configured to receive the electrical signals from the receiver. The system includes a cage in a pluggable form factor configured to house the module and the connector, wherein the transmitter is positioned outside the cage. | 06-17-2010 |
20100150571 | OPTICAL MODULE WITH EASILY PRODUCED FERRULE ASSEMBLY AND METHOD FOR PRODUCING THE SAME - An optical module with a ferrule assembly able to be easily produced is disclosed. The ferrule with a tubular shape provides first to third bores. The first bore receives the optical fiber with a sheath, the second bore receives only the glass core of the fiber, which is obtained by removing the sheath, and the third bore has a diameter substantially equal to the outer diameter of the glass core of the fiber. A resin is filled in the gap between the sheath and the third bore, and in the gap between the glass core of the fiber and the second bore. The tip of the glass core is tilted with the axis and protrudes from the end surface of the ferrule. | 06-17-2010 |
20100150572 | USB Compatible Apparatus for Connecting Between Optical USB Device and Electrical USB Device - A USB compatible apparatus for connecting an optical universal serial bus (USB) (or an optical serial bus; OSB) device and an electrical USB device, and a structure of the apparatus are provided. More particularly, a USB compatible apparatus for guaranteeing a connection between an optical USB device for inputting/outputting an optical signal and an electrical USB device for inputting/outputting an electrical signal, for example, signal transmission and reception between an electrical USB device (e.g., an electrical USB memory) and an optical USB device (e.g., a computer) having an optical USB port, and a structure of the USB compatible apparatus (a first exemplary embodiment), and a USB compatible apparatus for guaranteeing signal transmission and reception between an optical USB device (e.g., an optical USB memory) and an electrical USB device (e.g., a portable telephone) having an electrical USB port, and a structure of the USB compatible apparatus (a second exemplary embodiment) are provided. | 06-17-2010 |
20100166433 | Optical signal transfer device - An optical signal transfer device includes a transmitter system and a receiver system for signal transfer between a base unit and a rotary unit. The receiver system includes a natural number n of light receiving portions forming a ring-like light receiving area around the rotary axis and a light reception controller. The transmitter system includes a light emitting portion, an emission controller, and an optical guide which guides a light beam from the light emitting portion to a light emitting area facing the light receiving area. The optical guide guides a light beam to the light emitting area in one of n equally divided areas of a ring-like opposing area which opposes the light receiving area. Therefore, one of the n light receiving portions always face the light emitting area irrespective of rotary position of the receiver system around the rotary axis relative to the transmitter system. | 07-01-2010 |
20100189444 | OPTICAL MEMS DEVICE AND REMOTE SENSING SYSTEM UTILIZING THE SAME - A remote sensing system comprises a micro-electromechanical sensor (MEMS) device comprising an optical energy absorbing sensing element that resonates by thermal expansion induced by absorption of optical signals, a remotely located optical source for transmitting driving optical signals to induce resonation in the sensing element, and a remotely located reader circuitry to read an original frequency of the sensing element using reader optical signals for determining a condition to which the MEMS device is exposed. | 07-29-2010 |
20100196014 | METHOD AND DEVICE FOR HITLESS TUNABLE OPTICAL FILTERING - The method for filtering an optical signal comprising a plurality of channels lying on a grid of optical frequencies equally spaced by a frequency spacing and occupying an optical bandwidth, comprises: a) operating an optical filter comprising a plurality of resonators, wherein a first resonator of the plurality is optically coupled to the optical signal and the remaining resonators are optically coupled in series to the first resonator, so that a respective resonance of each one of the plurality of resonators falls within a first frequency band having bandwidth less than or equal to 15 GHz; b) operating the optical filter so as to obtain a separation between said respective resonance of at least one resonator with respect to said respective resonance of at least another different resonator, the separation being greater than or equal to 25 GHz; c) operating the optical filter so that said respective resonance of each one of the plurality of resonators falls within a second frequency band, different from the first frequency band, having bandwidth less than or equal to 15 GHz, wherein during the procedure from step a) to step c), at least one among said respective resonance of the at least one resonator and said respective resonance of the at least another different resonator is moved also outside a frequency region spanning between, and including, the first and the second frequency band. A corresponding device for filtering an optical signal is disclosed. | 08-05-2010 |
20100196015 | TECHNIQUE FOR SECURING TRANSMISSION OF DATA ALONG AN OPTICAL COMMUNICATION LINE - A technique for securing data transmission via an optical communication line comprising an optical fiber extending between a first network element and a second network element; the technique comprises conveying a first optical signal carrying data via the optical fiber from the first network element towards the second network element at a predetermined optical wavelength, and conveying a second optical signal at the same predetermined optical wavelength via the same fiber in the opposite direction to create within the optical fiber a combined optical signal such that combination of the first and second optical signals is adapted to hamper an unauthorized non-intrusive extraction of the first optical signal from the combined optical signal. | 08-05-2010 |
20100209114 | Method and System for Single Laser Bidirectional Links - A method and system for single laser bidirectional links are disclosed and may include communicating a high speed optical signal from a transmit CMOS photonics chip to a receive CMOS photonics chip and communicating a low-speed optical signal from the receive CMOS photonics chip to the transmit CMOS photonics chip via one or more optical fibers. The optical signals may be coupled to and from the CMOS photonics chips utilizing single-polarization grating couplers. The optical signals may be coupled to and from the CMOS photonics chips utilizing polarization-splitting grating couplers. The optical signals may be amplitude or phase modulated. The optical fibers may comprise single-mode or polarization-maintaining fibers. A polarization of the high-speed optical signal may be configured before communicating it over the single-mode fibers. The low-speed optical signal may be generated by modulating the received high-speed optical signal or from a portion of the received high-speed optical signal. | 08-19-2010 |
20100226657 | All Optical Fast Distributed Arbitration In A Computer System Device - Various embodiments of the present invention are directed to systems and methods for all optical distributed arbitration for computer system components ( | 09-09-2010 |
20100226658 | OPTICAL RECEIVING APPARATUS, METHOD FOR OPTICAL RECEPTION, AND OPTICAL TRANSMISSION SYSTEM - An optical receiving apparatus, including an optical interferometer including first and second optical waveguides having light paths different in length and converting a phase modulated signal received by the optical receiving apparatus into an intensity modulated signal, monitors the results of the detecting by the temperature detector and the measuring by the electric current measure while sweeping the temperature of the first optical waveguide in a predetermined range; selects the temperature of the first optical waveguide at which temperature the average photocurrent has an extreme value based on the result of the monitoring; and varies the temperature of the first optical waveguide to the selected temperature. | 09-09-2010 |
20100284700 | Optical Fiber Communication Link - A communication includes an analog input configured to receive an analog signal. An analog to digital converter is configured to provide a digital signal output based upon the analog input. A modulator is configured to modulate a laser based upon the digital signal thereby generating a modulated optical signal. An optical fiber carries the modulated optical signal and an optical detector arranged to receive the modulated optical signal from the optical fiber and provide a received output. A digital to analog converter digitizes the received output and provides an analog output based respective of the analog signal provided to the analog input. | 11-11-2010 |
20100316391 | Optical Interconnection Arrangement For High Speed, High Density Communication Systems - An optical interconnection arrangement for use in high data applications is presented that eliminates the need for extensive serialization/de-serialization (SERDES) functionality by utilizing pulse amplitude modulation (PAM) techniques to represent the data in the optical domain while utilizing a separate channel for transmitting an optical clock signal, eliminating the need for clock recovery circuitry on the receive end of the arrangement. | 12-16-2010 |
20110020008 | PHOTONIC BANDGAP FIBERS - Included among the many structures described herein are photonic bandgap fibers designed to provide a desired dispersion spectrum. Additionally, designs for achieving wide transmission bands and lower transmission loss are also discussed. For example, in some fiber designs, smaller dimensions of high index material in the cladding and large core size provide small flat dispersion over a wide spectral range. In other examples, the thickness of the high index ring-shaped region closest to the core has sufficiently large dimensions to provide negative dispersion or zero dispersion at a desired wavelength. Additionally, low index cladding features distributed along concentric rings or circles may be used for achieving wide bandgaps. | 01-27-2011 |
20110052204 | Intentionally Skewed Optical Clock Signal Distribution - Embodiments of the present invention relate to systems and methods for distributing an intentionally skewed optical-clock signal to nodes of a source synchronous computer system. In one system embodiment, a source synchronous system comprises a waveguide, an optical-system clock optically coupled to the waveguide, and a number of nodes optically coupled to the waveguide. The optical-system clock generates and injects a master optical-clock signal into the waveguide. The master optical-clock signal acquiring a skew as it passes between nodes. Each node extracts a portion of the master optical-clock signal and processes optical signals using the portion of the master optical-clock signal having a different skew for the respective extracting node. | 03-03-2011 |
20110069969 | WAVEGUIDES AND DEVICES FOR ENHANCED THIRD ORDER NONLINEARITIES IN POLYMER-SILICON SYSTEMS - Systems and methods for manipulating light with high index contrast waveguides clad with substances having that exhibit large nonlinear electro-optic constants such as χ | 03-24-2011 |
20110069970 | CODED PULSE DATA TRANSMISSION USING A LOOK-UP TABLE - Input data is encoded using a look-up table and then transmitted over a transmission medium as a series of pulses. The look-up table includes data elements. The length of each pulse is calibrated to correspond to one of the data elements in the look-up table. Upon receipt at another end of the transmission medium, the data is decoded using a look-up table. This decoding includes measuring the length of each received pulse to match the measured length to a corresponding one of data elements in the look-up table. | 03-24-2011 |
20110076027 | LOW-FREQUENCY SIGNAL OPTICAL TRANSMISSION SYSTEM AND LOW-FREQUENCY SIGNAL OPTICAL TRANSMISSION METHOD - The system includes: a two-light wave generator for generating light beams having wavelengths λ | 03-31-2011 |
20110076028 | SEMICONDUCTOR DEVICE COMPRISING A BURIED WAVEGUIDE FOR DEVICE INTERNAL OPTICAL COMMUNICATION - In an integrated circuit device, such as a microprocessor, a device internal optical communication system is provided in order to enhance signal transfer capabilities while relaxing overall thermal conditions. Furthermore, the device internal optical data or signal transfer capabilities may result in superior operating speed and a high degree of design flexibility. The optical communication system may be applied as a chip internal system in single chip systems or as an inter-chip optical system in three-dimensional chip configurations provided in a single package. | 03-31-2011 |
20110076029 | Device Having a Casing and/or Interior Acting as a Communication Bus Between Electronic Components - A device other than a projectile including: a casing, at least a portion of which contains a potting material acting as the optical waveguide material; a transmitter for transmitting a pulse based signal at least partially through the potting material; and a receiver for receiving the pulse based signal after one or more reflections of the pulse based signal from interior surfaces of the casing; the pulse based signal having a pulse rate configured such that a subsequent pulse doesn't interfere with reflections from an immediately previous pulse. | 03-31-2011 |
20110103802 | Transceiver for Plastic Optical Fiber Networks - An apparatus comprises an optical transmitter; an optical detector configured to receive optical signals from an optical fiber; an optical splitter having a first port, a second port coupled to the optical detector by the optical fiber, and a third port coupled to the optical transmitter; and a two stage amplifier system connected to an output of the optical detector. An input surface of the optical detector may have a diameter that is substantially equal to a diameter of a core in the optical fiber. The diameter of the input surface of the optical detector reduces capacitance and reduces signal distortion. The optical splitter may be configured to receive a first optical signal at the first port. The optical splitter may be configured to send the first optical signal to the second port and send a second optical signal received at the third port to the first port. | 05-05-2011 |
20110129231 | OPTICAL ENGINE FOR POINT-TO-POINT COMMUNICATIONS - An optical engine for providing a point-to-point optical communications link between a first computing device and a second computing device. The optical engine includes a modulated hybrid micro-ring laser formed on a substrate and configured to generate an optical signal traveling parallel to the plane of the substrate. The optical engine further includes a waveguide, also formed in a plane parallel to the plane of the substrate, that is configured to guide the optical signal from the modulated ring laser to a defined region, a waveguide coupler at the defined region configured for coupling the optical signal into a multi-core optical fiber, and a multi-core optical fiber at the defined region that is configured to receive and transport the optical signal to the second computing device. | 06-02-2011 |
20110142454 | OPTICAL TRANSMISSION AND RECEPTION CONTROL APPARATUS - An optical transmission and reception control apparatus is provided. The present invention relates to an optical transmission and reception control apparatus for enabling smooth optical transmission and reception when a photo diode and/or a laser diode fail. The apparatus includes a plurality of laser diodes, a laser driver, a first switching unit, a plurality of photo diodes, an optical power amplifier, a second switching unit, an optical power detection module, and a control module. | 06-16-2011 |
20110150497 | CONTACTLESS INFRARED DATA TRANSMISSION FOR WIND TURBINES - An apparatus for enabling transmission of signals and data via means of infrared (IR) light for a wind turbine includes a plurality of IR data communication elements configured to provide unidirectional and bidirectional IR data exchange between non-rotating portions of the wind turbine and the rotatable wind turbine hub. | 06-23-2011 |
20110164882 | SINGLE-FIBER PROTECTION IN TELECOMMUNICATIONS NETWORKS - A solution for detecting and recovering from a failure in a protected single-fiber passive optical network. A detector is used to detect the degradation in power level of optical signals. Furthermore, the invention discloses a variable symmetric split ratio approach to improve the number of splits (e.g. the number of ONUs). A single-fiber passive optical network is disclosed that uses a plurality of passive nodes connected in the optical fiber between the interfaces, wherein in the passive nodes 2-by-2 splitters/combiners are used to couple optical power from and into the optical fiber at a predetermined split ratio. | 07-07-2011 |
20110164883 | Reconfiguration and Protocol Adaptation of Optoelectronic Modules and Network Components - An optoelectronic module for converting and coupling an information-containing electrical signal with an optical fiber including a housing having an electrical input for coupling with an external cable or information system device and for transmitting and receiving information-containing electrical signals over such input, and a fiber optic connector adapted for coupling with an external optical fiber for transmitting and receiving an optical signal; an electro-optic subassembly coupled to the information containing electrical signal and converting it to and/or from a modulated optical signal corresponding to the electrical signal; means disposed in the housing for determining the electrical and/or optical protocols or packet formats in use; and a processor for adapting the module to utilize the electrical and optical protocol or packet format. | 07-07-2011 |
20110200337 | MODULATION SCHEME - The present invention relates to a method for modulation, the method comprising: receiving a data stream; forming a modulated electrical signal from the data stream by using a plurality of data signals, each of the plurality of data signals representing at least one data bit of the data stream, wherein one of the plurality of data signals is a zero signal and wherein the remainder of the plurality of data signals comprises periodic, positive non-zero subcarrier signals and/or non-periodic signals with a positive DC-level; and providing the modulated electrical signal representing the data stream. | 08-18-2011 |
20110211842 | High-Speed Receiver Architecture - A receiver (e.g., for a 10G fiber communications link) includes an interleaved ADC coupled to a multi-channel equalizer that can provide different equalization for different ADC channels within the interleaved ADC. That is, the multi-channel equalizer can compensate for channel-dependent impairments. In one approach, the multi-channel equalizer is a feedforward equalizer (FFE) coupled to a Viterbi decoder, for example a sliding block Viterbi decoder (SBVD); and the FFE and/or the channel estimator for the Viterbi decoder are adapted using the LMS algorithm. | 09-01-2011 |
20110211843 | Optical Broadcast With Buses With Shared Optical Interfaces - Various embodiments of the present invention are directed to optical broadcast buses configured with shared optical interfaces for fan-in and fan-out of optical signals. In one aspect, an optical broadcast bus ( | 09-01-2011 |
20110236030 | OPTICAL INTERCONNECT AND SIGNAL TRANSMISSION METHOD - An optical interconnect includes a transmitter circuit, a receiver circuit and an optical signal transmission route. The transmitter circuit includes a control circuit and an electrical/optical converter circuit. The control circuit receives an input electrical signal and outputs a drive signal. The electrical/optical converter circuit includes a light emitting element and converts the drive signal to an optical signal. The receiver circuit includes an optical/electrical converter circuit and a data recovery circuit. The data recovery circuit includes a second trigger signal generator and a latch circuit. The optical/electrical converter circuit includes a light receiving element and a received-signal amplifying circuit. The light receiving element converts the optical signal from the light emitting element to an output current signal. The received-signal amplifying circuit converts the output current signal to a required digital voltage signal. The optical signal transmission route optically is connecting the transmitter circuit and the receiver circuit. | 09-29-2011 |
20110236031 | OPTICAL INTERFACE DEVICE, AND ABNORMALITY MONITORING METHOD FOR INPUT FREQUENCY DEVIATION - An optical interface device determines whether frequency deviation of a clock signal corresponding to an optical signal from a client side is abnormal based on a stuff amount when subjecting a data signal corresponding to an optical signal input from the client side to a stuffing process, inserts an alarm indication signal (AIS) indicating that the frequency deviation is abnormal into a predetermined region of a data signal when the deviation is determined to be abnormal, and outputs an optical signal generated corresponding to the data signal to a WDM line side so as to transfer the AIS to another component disposed downstream therefrom, so that locating a site where an abnormal state occurs is made easier. | 09-29-2011 |
20110243572 | OPTICAL RECEIVER AND COMMUNICATION SYSTEM - There is provided an optical receiver including a variable-ratio splitter to split an input signal light into a plurality of signal lights, based on a variable ratio, a plurality of photo detectors to receive the plurality of signal lights respectively, an operation circuit to output a reception electrical signal, based on a reception processing on one of the plurality of signal lights, a calculation circuit to calculate a total power of the plurality of signal lights received by the plurality of photo detectors, and an output unit to output a signal regarding the total power. | 10-06-2011 |
20110274437 | RADIO FREQUENCY IDENTIFICATION (RFID) IN COMMUNICATION CONNECTIONS, INCLUDING FIBER OPTIC COMPONENTS - Radio frequency identification (RFID)-equipped communication components are disclosed. The communication components can include fiber optic components, such as fiber optic connectors and fiber optic adapters as examples. An RFID-equipped circuit is provided in the communication components to communicate information. In order that the electrical circuit be provided in the communication component without altering the communication component connection type, the circuit may be disposed in at least one recessed area of the communication component housing. In this manner, the communication component maintains its connection type such that it is compatible with a complementary communication component connection type for backwards compatibility while also being RFID-equipped. The circuit may also be provided in a substrate containing one or more electrical contacts coupled to the circuit such that a wired coupling is established with one or more electrical contacts provided in another communication component when connected. | 11-10-2011 |
20110274438 | OPTICAL ENGINE FOR POINT-TO-POINT COMMUNICATIONS - An optical engine ( | 11-10-2011 |
20110280584 | OPTICAL FIBER WITH SUPPRESSED STIMULATED BRILLOUIN SCATTERING - The present invention relates to optical fibers useful for the transmission of electromagnetic energy at such high levels of power that stimulated Brillouin scattering (SBS) may be of importance. One aspect of the present invention is an optical fiber for the propagation of optical radiation having an optical wavelength, the optical fiber and optical wavelength having an SBS acoustic wavelength associated therewith, the optical fiber comprising a core having a geometrical center and an outer perimeter; and a cladding surrounding the core; wherein the core is rare earth doped and substantially free of germanium, the optical fiber has a refractive index profile such that the core is guiding for optical radiation having the optical wavelength, and the optical fiber has an acoustic index profile such that the core is antiguiding for an acoustic wave having the SBS acoustic wavelength. | 11-17-2011 |
20110311232 | Optical receiver and optical transmission system - Disclosed herein is an optical receiver including: a light receiving element configured to have an anode and a cathode and generate a photocurrent dependent on received signal light; a current-voltage conversion circuit configured to be connected to the anode of the light receiving element and convert the photocurrent to a voltage signal; and a capacitive passive element configured to have a first electrode and a second electrode. The cathode of the light receiving element is connected to the first electrode of the capacitive passive element, and the second electrode of the capacitive passive element is connected to a reference potential of the current-voltage conversion circuit and the second electrode is not coupled to objects other than a reference potential terminal of the current-voltage conversion circuit. | 12-22-2011 |
20110318016 | CROSS-TALK REDUCTION IN A BIDIRECTIONAL OPTOELECTRONIC DEVICE - A bidirectional optoelectronic device comprises a photodetector and a light source on a waveguide substrate, and a drive circuit for the light source. The waveguide substrate can include light collector(s) or trap(s) for redirecting and attenuating portions of optical signals propagating in waveguide layers on the substrate but not guided by a waveguide. A protective encapsulant can be applied that includes hollow dielectric microspheres to reduce electrical cross-talk, and that can further include an optical absorber to reduce optical cross-talk. | 12-29-2011 |
20120027417 | OPTICAL POWER DIVIDER - An optical power divider includes a body having a first side and a second side. The first side includes at least one cylindrical input lens and the second side includes an array of output lenses. The at least one cylindrical input lens is configured to expand input light along a first axis to be directed to a plurality of the output lenses arranged along the first axis and the output lenses are configured to focus the light received from the input lenses into respective output beams of light. | 02-02-2012 |
20120033979 | OPTOELECTRONIC COMMUNICATIONS ASSEMBLY HAVING AN ELECTRICAL AND OPTICAL INTERFACE - In one example embodiment, an optoelectronic communications assembly having an optical receiver or an optical transmitter includes an optical interface disposed at an end thereof and through which optical signals are communicated by the optical receiver or optical transmitter. The optoelectronic communications assembly also includes an electronic component and a first electrical interface disposed at the optical interface end of the optical communications assembly and communicatively coupled to the electronic component. | 02-09-2012 |
20120076504 | LASER AMPLIFICATION SYSTEM - A high peak intensity laser amplification system and the method therein implemented are provided. In a first aspect of the invention, the laser system includes at least one optical member ( | 03-29-2012 |
20120087674 | OPTICAL DATA PATH SYSTEMS - This disclosure is directed to optical data path systems that enable unidirectional and bidirectional transmission of optical signals between nodes of a multi-node system such as a multiprocessor system. In one aspect, an optical data path system includes an optical device layer connected to nodes of a multi-node system and a controller. The optical device layer includes a waveguide network of waveguide branches optically connecting each node of the multi-node system to every other node of the multi-node system, resonators disposed adjacent to the waveguide branches, and detectors disposed adjacent to waveguide branches of the waveguide network. Each detector is electronically connected to a node of the multi-node system. The resonators are operated by the controller to control the path of optical signals sent between the nodes of the multi-node system. | 04-12-2012 |
20120128370 | Optical Hetrodyne Devices - An optical heterodyne device includes an optical meta-material exhibiting non-linear behavior. The optical meta-material mixes an input signal and a local signal to produce a heterodyne signal. | 05-24-2012 |
20120128371 | COMMUNICATION SYSTEM AND METHOD - A communication system including: a first communication device located in a first zone; a second communication device located in a second zone for generating an optical carrier signal; and at least one optical fibre connected to the first communication device for supplying power for operation of the first communication device and for supplying the optical carrier signal from said second zone, wherein the first communication device includes: a user interface for inputting information; and an optical modulator for modulating the optical carrier signal to include information input with said user interface and forwarding the modulated signal via the at least one optical fibre to the second communication device. | 05-24-2012 |
20120134681 | SEMICONDUCTOR LASER DRIVE DEVICE, SEMICONDUCTOR LASER DRIVE METHOD, LIGHT TRANSMISSION DEVICE, OPTICAL WIRING MODULE, AND ELECTRONIC DEVICE - A semiconductor laser drive apparatus comprises a bias current setting section ( | 05-31-2012 |
20120189317 | HYBRID III-V SILICON LASER FORMED BY DIRECT BONDING - Described herein is a hybrid III-V Silicon laser comprising a first semiconductor region including layers of semiconductor materials from group III, group IV, or group V semiconductor to form an active region; and a second semiconductor region having a silicon waveguide and bonded to the first semiconductor region via direct bonding at room temperature of a layer of the first semiconductor region to a layer of the second semiconductor region. | 07-26-2012 |
20120213528 | OPTICAL RECEIVING DEVICE AND COMMUNICATION SYSTEM - An optical receiving device includes multiple input ports to which light is input; multiple amplifiers that are arrayed and provided corresponding to the input ports, respectively, each of the amplifiers amplifying and outputting light input from a corresponding input port among of the input ports; a photo diode that converts light into an electrical signal; and a lens that inputs to the photo diode light output from the amplifiers. | 08-23-2012 |
20120251126 | Optical Fibers With Tubular Optical Cores - An embodiment of an apparatus includes an optical fiber for which a complete orthogonal basis of propagating modes at an optical telecommunication frequency includes ones of the propagating modes with different angular momenta. The optical fiber has a tubular optical core and an outer optical cladding in contact with and surrounding the tubular optical core. The tubular optical core has a larger refractive index than the optical cladding. The tubular optical core is configured such that those of the propagating modes whose angular momenta have the lowest magnitude for the propagating modes have substantially the same radial intensity profile. | 10-04-2012 |
20120308240 | OPTICAL TRANSMITTER, CONTROL METHOD FOR THE SAME, AND OPTICAL TRANSMISSION SYSTEM - An optical transmitter includes an optical modulator having first and second waveguides to modulate carrier light at each of the waveguides using a driving signal with 2*n intensity levels (n is an integer 1 or greater); and a phase shifter to cause a phase difference between a first optical signal and a second optical signal output from the first waveguide and the second waveguide, respectively. A photodetector converts a portion of a multilevel optical modulation signal acquired by combining the first optical signal and the second optical signals into an electrical signal. A monitor detects a change in an alternating current component in the detected modulation signal. A controller controls at least one of a first bias voltage and a second bias voltage being supplied to the first waveguide and the second waveguide, respectively, so as to increase the power value of the alternating current component. | 12-06-2012 |
20120308241 | Process for Enhanced 3D Integration and Structures Generated Using the Same - An enhanced 3D integration structure comprises a logic microprocessor chip bonded to a collection of vertically stacked memory slices and an optional set of outer vertical slices comprising optoelectronic devices. Such a device enables both high memory content in close proximity to the logic circuits and a high bandwidth for logic to memory communication. Additionally, the provision of optoelectronic devices in the outer slices of the vertical slice stack enables high bandwidth direct communication between logic processor chips on adjacent enhanced 3D modules mounted next to each other or on adjacent packaging substrates. A method to fabricate such structures comprises using a template assembly which enables wafer format processing of vertical slice stacks. | 12-06-2012 |
20130022362 | OPTICAL COMMUNICATIONS SYSTEM - An optical communications system ( | 01-24-2013 |
20130071128 | Opto-electronic circuits and techniques - A hybrid circuit for producing optical signals in response to electrical energizing signals, including: a tilted charge light-emitting device having an electrical input port and an optical output port, the device having an optical output response which is a function of input frequency; and an input interface circuit coupled with the electrical input port of the device, and having a transfer function substantially proportional to an inverse of the optical output response of the device; whereby application of the electrical energizing signals to the input interface circuit is operative to produce optical signals from the output optical port of the device. The input interface circuit includes a passive RLC circuit having a transfer function characterized by a region of increasing amplitude versus frequency. | 03-21-2013 |
20130084075 | SUPER-CHANNEL ASSIGNMENT USING A FLEXIBLE GRID - A node is configured to receive an instruction to establish a channel having a bandwidth that corresponds to an operating spectrum an optical fiber; obtain information that identifies a channel spacing and a pointer that identifies where, within the spectrum, to establish bandwidth allocations; identify a group of bandwidth segments based on the spectrum and the channel spacing; and generate bit words that correspond to the bandwidth allocations, where the bit words includes bits that, when set to a value, cause sets of segments to be reserved within the spectrum, and where the sets of segments identify where the bandwidth allocations begin and end, within the spectrum, relative to the pointer. | 04-04-2013 |
20130084076 | METHOD FOR OPTICAL PHASE MODULATION, Optical Phase Modulator AND OPTICAL NETWORK USING THE SAME - An optical phase modulator based on the principles of stimulated Brillouin scattering is disclosed. The optical phase modulator uses a pump wave and a probe wave counte-propagating in an optical fiber, whose frequencies are chosen such that a difference thereof differs from a resonant Brillouin frequency of the optical fiber. The pump wave is amplitude modulated prior to injecting into the optical fiber, causing phase modulation of the probe wave inside and at the exit from the optical fiber. Alternatively, the probe wave can be amplitude modulated, thereby causing a phase modulation of the pump wave. In the embodiments of the invention, the pump wave is a continuous wave, and the probe wave is a pulse Stokes wave or an anti-Stokes wave. A corresponding optical network using the phase modulator is also disclosed. | 04-04-2013 |
20130089338 | COMMUNICATION NETWORK - An optical access network that connects customers to a core network, the access network comprising: a different Optical Network Unit (ONU) connected to each customer; a different head-end device for each ONU that receives data from the core network intended for the ONU and configures the data for transmission to the ONU in accordance with a passive optical network (PON) protocol; and an optical fiber that connects the head-end device to the ONU. | 04-11-2013 |
20130156443 | METHOD AND SYSTEM FOR NON-LINEARITY COMPENSATION IN OPTICAL TRANSMISSION SYSTEMS - An equaliser ( | 06-20-2013 |
20130202313 | ELECTRONIC SYSTEM HAVING FANOUT OPTICAL BUSES - An electronic system includes a plurality of electronic nodes, each having a transmitter module and a plurality of receiver modules, in which the transmitter module is positioned at a same location with respect to the receiver modules in each of the electronic nodes, and a plurality of fanout optical buses, each fanout optical bus comprising a transmitter section, a plurality of receiver sections, and at least one substantially straight optical waveguide extending between the plurality of receiver sections, wherein each transmitter section is optically connected to a transmitter module of a respective one of the electronic nodes and wherein the receiver sections of each of the fanout optical buses is connected to respective ones of the receiver modules of the electronic nodes. | 08-08-2013 |
20130223849 | Pre-Distortion Techniques for Optical Modulators to Improve Constellation Point Separation - According to a first aspect, techniques are provided to optimize a Mach-Zehnder modulator drive waveform by distorting the outer modulation levels of the waveform, thereby equalizing eye openings of the received optical field, and in particular creating a wider and more defined central eye opening of the received optical field. According to a second aspect, techniques are provided to adjust in-phase (I) modulation levels based on the imperfect performance of a Mach-Zehnder modulator allocated to modulate quadrature-phase (Q) modulation levels, and conversely to adjust the Q modulation levels based on the imperfect performance of an MZ modulator allocated to modulate I modulation levels. | 08-29-2013 |
20130223850 | MODULATION METHOD AND APPARATUS FOR AMPLITUDE- OR INTENSITY-MODULATED COMMUNICATION SYSTEMS - The present invention relates to a method for determining a signaling set, comprising: selecting a first basis function in the form of a symmetric pulse represented by an even function; selecting a second basis function orthogonal to the first basis function; wherein the second basis function is represented by an odd function having a shape determined by a variable parameter; and determining a signaling set comprising a plurality of data signals formed by linear combinations of the first and second basis functions based on a predetermined requirement of the signaling set. The invention also relates to a modulation and demodulation method using the signaling set, a device performing the modulation and demodulation method and to a system incorporating such a device. | 08-29-2013 |
20130243440 | OPTICAL TRANSMISSION SYSTEM AND CONTROL SIGNAL TRANSMISSION METHOD - An optical transmission system includes at least a first optical link to transmit a first data signal as a part of a multi-lane signal and a second optical link to transmit a second data signal as another part of the multi-lane signal; on the transmission side, a reference clock is constantly applied to the first data signal of the first optical link, and a delay clock is applied to the second data signal responsive to a control signal on the second optical link; on the receiving side, the phase of a first clock signal detected from the first data signal received on the first optical link and the phase of a second clock signal detected from the second data signal received on the second optical link are compared, and the control signal is detected from the comparison result. | 09-19-2013 |
20130251378 | TWO-PHASE OPTICAL COMMUNICATION METHODS AND OPTICAL BUS SYSTEMS FOR IMPLEMENTING THE SAME - Various embodiments of the present invention are directed to methods and systems for transmitting optical signals from a source to a plurality of receiving devices. In one method embodiment, an optical enablement signal is transmitted from the source to the plurality of receiving devices. The target receiving device responds to receiving the optical enablement signal by preparing to receive one or more optical data signals. The source transmits the one or more optical data signals to the target receiving device. The remaining receiving devices do not receive the one or more optical data signals. | 09-26-2013 |
20130259489 | MEMORY EXPANDING DEVICE, PORTABLE MOBILE DEVICE AND PORTABLE MOBILE SYSTEM USING THE SAME - A memory expanding device for expanding a main memory of an external device connected to the memory expanding device through an optical interface. | 10-03-2013 |
20130294780 | PLANAR OPTICAL INTERFACE AND SPLITTER - An apparatus includes an optical Input/Output (I/O) connector, which has a central axis that is mounted in a plane and which is configured to connect to external optical fibers for transferring input optical signals to the apparatus and output optical signals from the apparatus. A first optical ferrule is mounted perpendicularly to the optical I/O connector in the plane, and is configured to transfer the input optical signals from the optical I/O connector to respective optical detectors. A second optical ferrule is mounted perpendicularly to the optical I/O connector in the plane, and is configured to transfer the output optical signals from respective optical emitters to the optical connector. A light rotation module is configured to bend and transfer the input and output optical signals between the optical I/O connector and the perpendicularly-mounted first and second optical ferrules. | 11-07-2013 |
20130294781 | DATA TRANSMISSION SYSTEM AND OPTICAL DATA CABLE - A data transmission system includes a first electronic device, a second electronic device, and a detachable optical data cable. The first electronic device and the second electronic device, both include a processor. The optical data cable includes a first connecting member, a second connecting member, and a signal transmitting cable. The first connecting member includes a first photoelectric conversion module, and the second connecting member includes a second photoelectric conversion module. The optical signal transmitting cable includes an optical fiber and an electrical wire. The optical fiber connect with the two photoelectric conversion modules. The processor of the first electronic device includes an electrical power emitting module, for emitting electrical power from the first electronic device to the second inserting port via the electrical wire of the optical data cable, to start the second photoelectric conversion module. The present disclosure further provides an optical data cable. | 11-07-2013 |
20130302037 | DEVICE FOR SENDING AND RECEIVING SATA SIGNALS OVER AN OPTICAL FIBER LINK - A system for transmitting an optical signal between a host and a device according to a SATA protocol. The system comprises a transmitting-side converter for generating a logic one voltage value responsive to a data one value from an information source, for generating a logic zero voltage value responsive to a data zero value from the information source, for generating an idle state logic voltage value, wherein the idle state logic voltage value is (logic one voltage value+logic zero voltage value)/2, the transmitting-side converter comprising only linear functions to preserve the idle state logic voltage value, and an electrical-to-optical converter for converting the logic one, logic zero and the idle state logic voltage values to an optical signal further comprising respective logic one, logic zero and idle state optical values and for supplying the optical signal to an optical communications medium. | 11-14-2013 |
20130308958 | Method and System for Implementing Time Synchronization - The present disclosure discloses a method and a communication system for time synchronization. The system includes at least one base station, an optical line terminal OLT, and a fiber for transmitting information between the base station and the OLT. The system further includes a clock synchronization server, configured to transmit synchronization data between the clock synchronization server and the at least one base station, so that time synchronization is implemented between the at least one base station and the clock synchronization server. According to the solutions provided by the present disclosure, the system apparatus is simple, and the cost low. | 11-21-2013 |
20130322887 | OPTICAL COMMUNICATIONS CARD, AN OPTICAL COMMUNICATIONS SYSTEM, AND METHODS AND APPARATUSES FOR PROVIDING HIGH-DENSITY MOUNTING OF OPTICAL COMMUNICATIONS CARDS - An optical communications card is provided that has multiple parallel optical communications modules mounted on one or both sides of the card. A plurality of the optical communications cards can be edge-mounted and/or mid-plane mounted in an optical communications system such that the cards are electrically connected to a motherboard PCB. Because the spacing, or pitch, between the edge-mounted or mid-plane mounted cards can be very small, the cards can be mounted with very high density to provide the optical communications system with very high bandwidth. | 12-05-2013 |
20130322888 | OPTICAL TRANSMISSION CIRCUIT DEVICE, OPTICAL RECEPTION CIRCUIT DEVICE, OPTICAL TRANSMISSION/RECEPTION CIRCUIT DEVICE AND OPTICAL TRANSMISSION METHOD - An optical transmission circuit device generates first and second optical signals from differential set and reset signals each time digital electric input signals of N bits are received. The differential set signal indicates an increase in signal strength relative to immediately preceding N bits of the digital electric input signals and the differential reset signal indicates a decrease in signal strength relative to the immediately preceding N bits. An optical reception circuit device generates first and second digital signals from the first and second optical signals and a third digital signal from the first and second digital signals, a magnitude of the third digital signal being increased by the first digital signal and decreased by the second digital signal. The optical reception circuit further generates a digital output signal of N bits from the third digital signal and an immediately preceding N bits of the digital output signal. | 12-05-2013 |
20130322889 | ROTARY TRANSMISSION DEVICE FOR MACHINE TOOLS - The invention relates to a rotary transmission device for machine tools, comprising a stator part that is rigidly attached to the machine, a rotor part that is rigidly attached to the tool and can be rotated about a rotational axis, and stator-side and rotor-side transmitting and receiving elements for bidirectionally transferring data without contact. According to the invention, in order to guarantee trouble-free data transfer even for inductive energy transmission at high power, the transmitting and receiving elements are designed as optoelectronic components, which are combined on the stator part and the rotor part to form stator-side and rotor-side transmitter groups and receiver groups each having associated transmitting and receiving electronics. The transmitting and receiving elements of the rotor-side and stator-side transmitter and receiver groups associated with each other face each other in pairs by means of an axial light-guiding segment and are arranged relative to each other in such a way that the transmitter and receiver groups associated with each other communicate with each other by means of at least one of the transmitting and receiving elements thereof in each rotational position of the rotor part relative to the stator part. | 12-05-2013 |
20130322890 | HYBRID LASER INCLUDING ANTI-RESONANT WAVEGUIDES - Described are embodiments of apparatuses and systems including a hybrid laser including anti-resonant waveguides, and methods for making such apparatuses and systems. A hybrid laser apparatus may include a first semiconductor region including an active region of one or more layers of semiconductor materials from group III, group IV, or group V semiconductor, and a second semiconductor region coupled with the first semiconductor region and having an optical waveguide, a first trench disposed on a first side of the optical waveguide, and a second trench disposed on a second side, opposite the first side, of the optical waveguide. Other embodiments may be described and/or claimed. | 12-05-2013 |
20140029954 | Systems for Transmitting Control Signals Over a Fiber Optic Data Network and Related Methods and Apparatus - Optical couplers for injecting an optical control signal onto an optical fiber include a micro-ring resonator that is coupled to the optical fiber, an optical transmission path and a modulator that is configured to vary a distance between the optical transmission path and the micro-ring resonator in order to selectively couple light from the optical transmission path onto the micro-ring resonator. | 01-30-2014 |
20140029955 | Optical Interconnect - An optical interconnect ( | 01-30-2014 |
20140050492 | REVERSE CONDUCTIVE NANO ARRAY AND MANUFACTURING METHOD OF THE SAME - A high-speed photodiode may include a photodiode structure having a substrate, a light-absorbing layer and a light-directing layer that is deposited on a top surface of the photodiode structure and patterned to form a textured surface used to change the angle of incident light to increase a light path of the incident light when entering the photodiode structure. In one embodiment, the light-directing layer may include a plurality of polygon such as triangular projections to refract the incident light to increase the light path thereof when entering the photodiode structure. In another embodiment, a plurality of nanoscaled sub-triangular projections can patterned on both sides of each triangular projection to more effectively increase the light paths. In a further embodiment, porous materials can be used to form the light-directing layer. | 02-20-2014 |
20140056595 | OPTICAL TRANSMISSION SYSTEM, CONTROL SIGNAL TRANSMISSION METHOD, AND OPTICAL MODULE - An optical transmission system including a transmitting unit to transmit an optical main signal, a receiving unit to receive the optical main signal, and a transmission line through which the optical main signal is transmitted, the optical transmission system includes: an optical transmitter unit configured to be activated or inactivated based on a control signal so as to transmit the control signal, the optical transmitter being included in the transmitting; and an optical receiver configured to receive light with the activate state or the inactivate state of the optical transmitter the optical receiver being included in the receiving unit, wherein the receiving unit regenerates the control signal, based on a power of the received light. | 02-27-2014 |
20140056596 | OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM - An inexpensive low-attenuation optical fiber | 02-27-2014 |
20140086593 | PHASE LOCKED LOOP - An optical phase-locked loop (OPLL) comprising a phase-frequency detector; first and second lasers; a local oscillator; a detector and a low pass filter connected in a circuit comprising a feedback path. The OPLL can also include a pre-scaler, a second local oscillator and a mixer. | 03-27-2014 |
20140093252 | SHIFT REGISTER CIRCUIT AND DISPLAY DEVICE USING THE SAME - The display device according to the present invention comprises a substrate and at least one optical coupler having an optical receiver and an optical transmitter formed on the substrate, wherein the optical transmitter transmits an optical signal to the optical receiver. | 04-03-2014 |
20140099125 | COLLIMATED BEAM CHANNEL WITH FOUR LENS OPTICAL SURFACES - An optical system and method disclosed include a first lens component and a second lens component within the receive path or the transmit path. The first lens component includes at least two aspheric surfaces that oppose one another and generate a collimated beam channel. The second lens component generates a converging beam and magnifies the converging beam with a magnification factor that is different from a magnification factor in the other path, either the receive path or the transmit path. The receive path and the transmit path include symmetrical lengths and asymmetrical magnification factors. | 04-10-2014 |
20140133864 | Edge coupling of optical devices - A system includes optical modules. Each module includes a different base and one or more module waveguides on the base. Module waveguides from different modules are aligned such that the aligned module waveguides exchange light signals. At least a portion of one of the aligned module waveguides is between the base of one of the modules and the base of another module. First electronics operate a transmitter on a first one of the optical modules so as to generate one of the light signals. Second electronics operate a receiver on a second one of the modules such that the electronics generate an electrical signal in response to the receiver receiving one of the light signals. | 05-15-2014 |
20140270802 | QUANTUM SYNCHRONIZATION FOR CLASSICAL DISTRIBUTED SYSTEMS - A quantum mechanical synchronization system for a classical distributed computing system. Einstein-Podolsky-Rosen links are established providing entangled photons to provide the quantum synchronization. In one embodiment, the system includes a laser oscillator pump, a spontaneous parametric down-conversion element coupled to the laser oscillator pump, the spontaneous parametric down-conversion element having a first optical output and a second optical output, a first photodetector coupled to the first optical output, a first clock coupled to the first photodetector, a second photodetector coupled to the second optical output by an optical link, and a second clock coupled to the second photodetector. | 09-18-2014 |
20140301741 | FAST OPTICAL RECEIVER - A method for optical transmission of high speed data and an optical receiver for receiving such high speed data is provided. The method includes transmitting an optical signal having a first logic-high and first logic-low defining a first modulation amplitude that is sub-band modulated with a toggling signal having a first toggling amplitude with a first modulation index, receiving the optical signal with an optical receiver circuit and converting the optical signal to an intermediate electrical signal, IES, having: a second logic-high and a second logic-low defining a second modulation amplitude, and a second toggling amplitude having a second modulation index, providing a decision threshold relative to the IES as a function of the second modulation amplitude, and adjusting the threshold by determining the second toggling amplitude and adjusting the threshold relative to the IES based on proportionality between the second toggling amplitude and the second modulation amplitude.z. | 10-09-2014 |
20140314425 | Full-Duplex Multi-Mode Fiber Communication - Techniques are presented herein to facilitate higher bandwidth communications in a data center using existing multi-mode fibers and full-duplex optical communication techniques. A first device transmits to a second device a first optical signal at a first wavelength on a first optical fiber. The first optical signal carries a first portion of Ethernet traffic. The first device receives a second optical signal transmitted at a second wavelength on the first optical fiber from the second device. The second optical signal carries a first portion of Ethernet traffic. On a second optical fiber, the first device transmits to the second device a third optical signal at a third wavelength. The third optical signal carries a second portion of Ethernet traffic. The first device receives a fourth optical signal at a fourth wavelength on the second optical fiber, the fourth optical signal carrying a second portion of Ethernet. | 10-23-2014 |
20140355998 | METHOD AND DEVICE FOR SYNCHRONIZING ENTANGLEMENT SOURCES FOR A QUANTUM COMMUNICATION NETWORK - According to one aspect, the invention relates to a device ( | 12-04-2014 |
20140363172 | Die Stack with Optical TSVs - A high density, low power, high performance information system, method and apparatus are described in which a laser source ( | 12-11-2014 |
20150071651 | MULTI-LEVEL CODING AND DISTORTION COMPENSATION - An optical communication system, a transmitter, a receiver, and methods of operating the same are provided. In particular, a transmitter is disclosed as being configured to encode optical signals in accordance with a multi-level coding scheme. The receiver is configured to provide receive and decode to the optical signals received from the transmitter. One or both of the receiver and transmitter are configured to compensate for non-idealities or non-linearities introduced into the communication system by optical components of the system. | 03-12-2015 |
20150132011 | Optical Cable Connector - Methods, systems, and devices are disclosed for interconnecting two optical fibers using a protective insert, wherein the protective insert includes a connective segment that provides optical communication connection between the two optical fibers. Furthermore the protective insert includes two attachment mechanism s adjacent to the connective segment with each of the two attachment mechanisms adapted to removably attach one of the two optical fibers to the connective segment. Such a protective insert may be implemented inside a network interface device (NID) or with a wall-plate to be installed inside customer premises in a manner that allows a customer to easily interconnect a home network cable to an optical network terminal. | 05-14-2015 |
20160006514 | INTEGRATED TRANSCEIVER WITH LIGHTPIPE COUPLER - A transceiver comprising a chip, a semiconductor laser, and one or more photodetectors, the chip comprising optical and optoelectronic devices and electronics circuitry, where the transceiver is operable to: communicate, utilizing the semiconductor laser, an optical source signal into the chip via a light pipe with a sloped reflective surface, generate first optical signals in the chip based on the optical source signal, transmit the first optical signals from the chip via the light pipe, and receive second optical signals from the light pipe and converting the second optical signals to electrical signals via the photodetectors. The optical signals may be communicated out of and in to a top surface of the chip. The one or more photodetectors may be integrated in the chip. The optoelectronic devices may include the one or more photodetectors integrated in the chip. The light pipe may be a planar lightwave circuit (PLC). | 01-07-2016 |
20160036528 | CALCULATING APPARATUS AND METHOD FOR NONLINEAR WEIGHTING COEFFICIENT - Embodiments of the present disclosure provide a calculating apparatus and method for nonlinear weighting coefficient. The calculating apparatus for nonlinear weighting coefficient includes: an approximation processing unit configured to use a rational function to perform approximation processing on a link loss/gain function in intra-channel nonlinear distortion estimation; and a coefficient calculating unit configured to calculate a nonlinear weighting coefficient in the nonlinear distortion estimation by using the approximated link loss/gain function and a large dispersion approximation, to obtain an analytical closed solution of the nonlinear weighting coefficient. With the embodiments of the present disclosure, a weighting coefficient of high precision may be obtained, thereby performing high-precision estimation on nonlinear distortion in case of loss. | 02-04-2016 |
20160043802 | DATA PROCESSING SYSTEMS, SYSTEMS ON CHIP, AND DATA PROCESSING SYSTEMS COMPRISING SYSTEMS ON CHIP - A data processing system may include: a first device; a second device; and an optical link connected between the first and second devices. The optical link may include a main optical waveguide configured to transmit an optical signal output from the second device; N sub-optical waveguides; N mode couplers, each configured to perform a mode coupling operation between the main optical waveguide and a respective one of the N sub-optical waveguides; and an optical wavelength filter connected to an output terminal of the main optical waveguide and an output terminal of each one of the N sub-optical waveguides. Each of the N sub-optical waveguides may include a first region formed at a first distance from the main optical waveguide; a second region formed at a second, greater distance from the main optical waveguide; and a third region for connecting the first and second regions. | 02-11-2016 |
20160072585 | Method Of Creating An Optical Link Among Devices - A method for creating optical links between two or more optical devices. The method eliminates the need for precision active alignment of the individual components to be joined. After the components to be joined have been bonded in place on a package the optical axis of each component is found and an optical link among the components is fabricated in-place. | 03-10-2016 |
20160142141 | OPTICAL COMMUNICATION DEVICE - An optical communication device includes an optical fiber, two chips, a light emitter, a photoelectric conversion device, and a circuit board. The chips includes a substrate, and a polarizing beam splitter positioned on the substrate, the polarizing beam splitter includes a first coupling device, second coupling device, a Y-waveguide, and a TM filter coupling to the third channel. The chips, the light emitter, and the photoelectric conversion device are coupled to the circuit board, the light emitter, and the photoelectric conversion device are connected electrically with the circuit board. | 05-19-2016 |
20160142155 | SEMICONDUCTOR PACKAGES WITH OPTICAL INTERCONNECTION STRUCTURES, MEMORY CARDS INCLUDING THE SAME, AND ELECTRONIC SYSTEMS INCLUDING THE SAME - A semiconductor package includes a first transceiver disposed on a top surface of a substrate; and a second transceiver disposed on a bottom surface of the substrate. The first and second transceivers optically communicate with each other through optical signals that permeate the substrate. | 05-19-2016 |
20160204862 | SYSTEM AND METHOD FOR COMMUNICATING HIGH AND LOW SPEED DATA VIA OPTICAL SIGNALS AND POWER VIA ELECTRICAL SIGNALS | 07-14-2016 |