Class / Patent application number | Description | Number of patent applications / Date published |
398142000 | Specific type of fiber or waveguide | 59 |
20080253774 | Device having a casing containing a potting material for transmitting signals between electronic components - A device including: at least two electronic/electrical components; and a casing, the casing having at least a portion thereof acting as a communication bus for connecting the at least two electronic/electrical components. | 10-16-2008 |
20090003834 | Plastic Optical Fiber and Manufacturing Method Thereof, and Optical Transmission System | 01-01-2009 |
20090232511 | Optical Micro-Connector - A low-cost, high-speed micro-connector replacement for current electrical inter-connects and intra-connects on printed circuit boards is provided. The invention permits fast and reliable information transmission over a single fiber through the utilization of an optical transmitter module or optical receiver module mounted in close proximity to a modulator used to encode optical signals from electrical impulses or decode optical signals to electrical impulses. The micro-connector is mounted on a PCB in alignment with the transmitting or receiving modules and provides appropriate alignment and stop positioning of an optical fiber used for optical transmitting between transmitting/receiving modules. | 09-17-2009 |
20090324242 | OPTICAL TRANSMISSION SYSTEM AND MULTI-CORE OPTICAL FIBER - An optical transmission system includes an optical transmitting unit that outputs at least one optical signal having a wavelength included in an operation wavelength band and a holey fiber that is connected to the optical transmitting unit. The holey fiber includes a core and a cladding formed around the core. The cladding includes a plurality of holes formed around the core in a triangular lattice shape. The holey fiber transmits the optical signal in a single mode. A bending loss of the holey fiber is equal to or less than 5 dB/m at a wavelength within the operation wavelength band when the holey fiber is wound at a diameter of 20 millimeters. | 12-31-2009 |
20100098430 | FREE SPACE OPTICAL COMMUNICATION WITH OPTICAL FILM - Devices and systems are provided for free space optical communication using optical films. Some embodiments involve using an optical film for the transmission and/or reception of light in a free space optical communication system. Some free space optical communication systems may involve devices, such as laptop computers, desktop computers, mobile communications devices, etc., that are configured for communication via an optical film. The optical film may be disposed on a device, on a wall, a window, furniture, etc., according to the implementation. Many types of free space optical communication systems are provided, including line of sight and non line of sight free space optical communication systems. | 04-22-2010 |
20100150573 | OPTICAL/ELECTRICAL COMPOSITE CABLE - An optical/electrical composite cable in which a first connector having an optical transmission unit is connected to a second connector having an optical reception unit via an electrical wire and optical wiring line is provided. The optical transmission unit and optical reception unit are driven by electrical power supplied from an external electronic device. A detection unit that detects a removal/attachment operation of at least one of the first and second connectors and an interruption unit that interrupts supply of electrical power to the optical transmission unit and optical reception unit when the removal/attachment operation is detected by the detection unit are provided. | 06-17-2010 |
20100202782 | APPARATUS FOR TRANSMITTING DATA BETWEEN TWO SYSTEMS WHICH MOVE RELATIVE TO ONE ANOTHER - An apparatus for transmitting data at high data rates, between two systems that move relative to one another is provided. The apparatus includes an optical fiber and an axial module on one of the two systems for the purpose of axial data coupling, using the optical fiber and a lateral module on another of the two systems for the purpose of lateral data coupling using the optical fiber. | 08-12-2010 |
20100232801 | Transmission of pathological data patterns - A method and apparatus is presented for reducing or eliminating pathological data patterns from signals for transmission over optical communications systems. One embodiment includes a decoder/deserializer configured to receive an encoded serial digital signal, a ditherer configured to dither a least significant bit of each digital data word, and a reserializer/encoder configured to serialize digital data and encode it, for example according to an applicable communication standard such as SMPTE 259M. The improvements may be provided in a single removable unit, such as a small form-factor pluggable (SFP) module compatible with existing optical communications equipment. | 09-16-2010 |
20110052205 | Combined optical and electrical interconnection module and method for producing same - A combined optical and electrical interconnection module includes a flat cable comprising an optical transmission line and an electrical wire, and a printed circuit board including a light receiving module for receiving optical signals and/or a light sending module for sending optical signals and an optical waveguide for the optical signals to be transmitted therethrough or an optical block for bending the optical paths of the optical signals. The printed circuit board is electrically and optically connected to both ends or one end of the flat cable. | 03-03-2011 |
20110076030 | Computer Having a Casing and/or Interior Acting as a Communication Bus Between Electronic Components - A computer including: a casing, at least a portion of which contains a potting material acting as an optical waveguide material; a transmitter for transmitting a pulse based signal at least partially through the potting material acting as the optical waveguide 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 |
20110091219 | LASER DRIVERS FOR CLOSED PATH OPTICAL CABLES - Simplified laser drivers for closed path digital optical cables and digital optical cables including the simplified laser drivers. The laser driver can include less transistors than conventional laser drivers for optical communication cables. The laser can include a bias source and modulation source. The bias source can have a single constant current bias point for all laser diodes. The modulation current source can have a single temperature coefficient for all laser diodes. The laser driver can exclude, for example, any one of or combination of temperature compensation of the modulation or bias current sources, external programming of the modulation or bias current sources, power control based on output of the laser diode, and/or control based on feedback received from a monitor device or other sensor within the cables. | 04-21-2011 |
20110103803 | Optical Fiber Array Connectivity System for Multiple Transceivers and/or Multiple Trunk Cables - A transition device for an optical fiber connection system adapted to interconnect a trunk cable with a plurality of transceivers includes: a first set of at least four optical fibers, each of the optical fibers having a trunk end and a transceiver end; a single trunk end terminal having a plurality of trunk ports arranged in a first row, each port connected with a respective one of the set of optical fibers at its trunk end, wherein a first axis of symmetry divides the ports; and a plurality of transceiver end terminals, each of the transceiver end terminals having even numbers of transceiver ports, each of the transceiver ports receiving a respective one of the set of optical fibers at their transceiver ends. The arrangement of fibers received by each transceiver end terminal meet either of the following two conditions: (a) a first fiber originates from a first port in the trunk end terminal, and a second fiber originates from a second port in the trunk end terminal that is positioned at the mirror image location of the first port about the first axis of symmetry; or (b) each fiber is received in a first transceiver end terminal that has a corresponding second transceiver end terminal with the same number and arrangement of transceiver ports, and each fiber received in the first transceiver end terminal originates from a port in the trunk end terminal that has a mirror image port about the first axis of symmetry from which a fiber that is received in the second transceiver end terminal originates. | 05-05-2011 |
20110135313 | OPTICAL FIBER COMMUNICATION METHOD AND TRANSMITTING DEVICE - An optical fiber communication method for communication between a transmitting terminal and a receiving terminal includes the steps of: providing an optical fiber to be coupled to the transmitting terminal and including a core that is provided with at least one second-order Bragg grating structure and a cladding that surrounds the core; configuring the transmitting terminal to output a data-carrying optical signal to one end of the core of the optical fiber for subsequent wireless transmission of the data-carrying optical signal via radiation through the second-order Bragg grating structure of the optical fiber; and configuring the receiving terminal to receive the signal radiated by the second-order Bragg grating structure of the optical fiber. A transmitting device is also disclosed. | 06-09-2011 |
20110222863 | UNREPEATERED LONG HAUL OPTICAL FIBER TRANSMISSION SYSTEMS - A long haul optical fiber transmission system includes a transmitter having a modulated bit rate of at least 40 Gb/s. A receiver is optically coupled to the transmitter with a composite optical fiber span. The optical fiber includes a first optical fiber coupled to the transmitter and a second optical fiber coupled to the first optical fiber. The first optical fiber has an effective area of at least 120 μm | 09-15-2011 |
20110262148 | COMPACT PLENUM-RATED RIBBON CABLES - Embodiments of the present invention include an optical fiber cable for use in a plenum. The cable comprises a tube, at least one optical fiber ribbon positioned within the tube, the optical fiber ribbon having a width (W), a jacket around the tube, the jacket having an outer diameter (D) and a limited oxygen index (LOI) of approximately at least 65%, at least two longitudinal strength members positioned between the tube and an outer surface of the jacket; and a yarn positioned between the tube and the jacket, wherein the ratio of the width (W) of the optical fiber ribbon and the outer diameter (D) of the jacket is approximately at least 0.25. | 10-27-2011 |
20120020673 | OPTICAL BACKPLANE - The invention relates to an optical backplane, comprising a plurality of component connectors and at least two interconnections configurations interconnecting the component connectors. The at least two interconnections configurations allow a dynamical selection of an interconnections configuration interconnecting the component connectors. | 01-26-2012 |
20120039615 | OPTICAL COMMUNICATION SYSTEM USING GROUNDED COPLANAR WAVEGUIDE - The invention discloses an optical communication system using grounded coplanar waveguide, comprising a current buffer and a transimpedance amplifier (TIA). Transmission lines of the optical communication system have grounded coplanar waveguide (GCPW) structures. The current buffer receives a current signal from a signal source, and outputs the current signal after reducing capacitance effects of the signal source. The TIA converts the current signal to a voltage signal, wherein a first end of the TIA receives the current signal, a second end of the TIAn outputs the voltage signal, and a shunt-shunt feedback circuit is coupled between the first end and the second end. Therefore, the present invention can minimize the circuit area and lower the power consumption as well. | 02-16-2012 |
20120087675 | Compact small form-factor pluggable transceiver - An apparatus, in accordance with particular embodiments, includes an interface configured to establish connections within a copper network. The apparatus also includes a receptacle configured to receive a conventional small form-factor pluggable (SFP) module or a compact SFP module and to direct the SFP modules to a first connector. The first connector connects either of the SFP modules to the node. A pin of the first connector is configured to receive a module detection signal and to transmit data to the compact SFP module. The apparatus also includes a low pass filter coupled to the pin of the first connector that passes the module detection signal to the node. The apparatus is further configured to establish two duplex connections with an optical fiber network if the compact SFP module is connected and to establish one duplex connection with the optical fiber network if the conventional SFP module is connected. | 04-12-2012 |
20120106974 | FORMATION OF AN OPTICAL WAVEGUIDE - Technologies are generally described for an optical waveguide, methods and systems effective to form an optical waveguide, and an optical system including an optical waveguide. In some examples, the optical waveguide may include a silicon oxynitride region in a wall of the silicon substrate. The silicon oxynitride region may define an inner region of the optical waveguide. The wall may define a via. The optical waveguide may include a silicon oxide region in the substrate. The silicon oxide region may define an outer region of the optical waveguide adjacent to the inner region. | 05-03-2012 |
20120148258 | OPTICAL COMMUNICATIONS SYSTEM - The present invention relates to an optical communications system that allows improving OSNR while suppressing the power increase of pumping light for distributed Raman amplification. In the optical communications system, an optical fiber is laid in a transmission section between a transmitter station (or repeater station) and a receiver station (or repeater station), and optical signals are transmitted from the transmitter station to the receiver station via the optical fiber. In the optical communications system, pumping light for Raman amplification, outputted by a pumping light source provided in the receiver station, is fed into the optical fiber via an optical coupler, and the optical signals are distributed-Raman-amplified in the optical fiber. The transmission loss and the effective area of the optical fiber satisfy, at the wavelength of 1550 nm, a predetermined relationship. | 06-14-2012 |
20120170942 | ALL SILICON 750NM AND CMOS-BASED OPTICAL COMMUNICATION SYSTEM UTILIZING MOD-E AVALANCHE LEDS - An optical communication system is provided comprising of a three terminal silicon based light emitting device operating by means of avalanche carrier multiplication and emitting at the below threshold wavelength detection range for Silicon of 850 nm; a low loss optical waveguide operating in the below threshold wavelength detection range for Silicon of 850 nm; and an optical detector, wherein a complete and all-silicon optical communication system is formed being capable of transferring electrical signals in terms of optical intensity variations, such intensities then being propagated through the waveguide and being detected by the optical detector; and being converted back to electrical signals. In a particular mode of operation of the system, wavelength modulation may be obtained. In other applications, transponding action and optical amplification may be obtained. | 07-05-2012 |
20120183304 | Multi-Core Optical Fiber And Optical Communication Systems - An apparatus includes an optical fiber having a plurality of optical cores therein. Each optical core is located lateral in the optical fiber to the remaining one or more optical cores and is able to support a number of propagating optical modes at telecommunications wavelengths. Each number is less than seventy. | 07-19-2012 |
20120195599 | SYSTEM, LASER-ON-CMOS CHIP, AND METHOD FOR SETTING A WAVELENGTH TO BE USED BY THE LASER-ON-CMOS CHIP - A system, a Laser-on-CMOS chip, and a method are described herein in accordance with the present invention. In one embodiment, the present invention enables a conventional WDM-capable system to dictate what wavelengths a Laser-on-CMOS chip's optical ports will use by seeding each of their LoC upstream reflective light generation devices (e.g., RSOAs) with a particular wavelength. | 08-02-2012 |
20120213529 | METHOD AND SYSTEM FOR ONE-WAY TIME TRANSMISSION - A method of controlling a timing state of a local oscillator ( | 08-23-2012 |
20120219301 | LOW-LOSS, LOW-LATENCY, HOLLOW CORE FIBER COMMUNICATION SYSTEM - An optical fiber communication system includes hollow core fiber coupled between a transmitter device and a receiver device. Both hollow core fiber and solid core fiber may be optically coupled between the transmitter and receiver devices, with the hollow core fiber preceding the solid core fiber. A Raman pump laser may be coupled to the solid core fiber to provide distributed Raman amplification in the solid core fiber. A plurality of series connected spans of hollow and solid core fiber may be employed. First and second transmission lines each having a hollow core fiber may be provided in a single cable. | 08-30-2012 |
20120294624 | TEXTILE-STRUCTURE OPTICAL COMMUNICATION INTERFACE DEVICE AND SYSTEM - A textile-structure optical communication interface device includes a diffusing unit configured to diffuse an optical signal including information transmitted between information devices. Further, the textile-structure optical communication interface device includes a condensing unit configured to condense the optical signal. Further, a textile-structure optical communication interface system includes a textile-structure optical communication interface device configured to enable optical fibers to be woven with yarns and to transmit and receive information between information devices. Furthermore, the textile-structure optical communication interface system includes a signal processing unit configured to signal-process the information transmitted and received between the information devices. | 11-22-2012 |
20130058661 | SYSTEM AND METHOD FOR ALIGNING A MULTI-CORE PLASTIC OPTICAL FIBER ASSEMBLY - A multi-core plastic optical fiber is used for multi-channel communication purposes. An alignment tool comprising a light source, selective filter and a detachable alignment-tube having a guide notch is provided to map the individual cores of a multi-core plastic optical fiber and prepare the connection of optical transceivers to both exposed ends of a pre-cut length of fiber. The alignment method results in a pre-cut length of fiber having alignment-tubes with guide notches secured to both ends. Transceiver guide projections mate to the notches, creating a complete optical multi-path between the transceiver active elements through the fiber cores. An automatic method of assembling optical transmitters to a multi-core fiber and mating optical receivers uses no alignment tools and tubes. This method dictates a specific placement of the optical transmitters in relation to the cores and receivers, assigning each transmitter to a preferred receiver based on detected light signal criteria. | 03-07-2013 |
20130084077 | OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM - An optical fiber that propagates light over a use wavelength bandwidth of 100 nm or wider in a plurality of propagation modes is provided. The optical fiber has: a confinement loss equal to or less than 1 dB/km in each of the plurality of propagation modes over the use wavelength bandwidth; and a bending loss equal to or less than 100 dB/m in each of the plurality of propagation modes over the use wavelength bandwidth when the optical fiber is bent at a diameter of 20 mm. | 04-04-2013 |
20130183045 | COMMUNICATION CABLE APPARATUS INCLUDING SWITCH TURNED OFF IN REVERSE CONNECTION STATE OF COMMUNICATION CABLE APPARATUS - A switch is inserted and connected between a first portion and a second portion of an HPD line. The switch connects the first portion to the second portion when an HPD signal is outputted to the second portion. The switch cuts off the connection between the first portion and the second portion when the HPD signal is not outputted to the second portion. An AND gate generates a connection state detection signal that represents the connection state of an HDMI optical active cable, and outputs the connection state detection signal to a switch. | 07-18-2013 |
20130322891 | Nanotube Signal Transmission System - A method and apparatus for transmitting signals. An apparatus comprises a tube comprising a number of layers of carbon forming a wall of the tube. The number of layers of carbon has a number of optical properties configured to propagate an optical signal and a number of electrical properties configured to conduct an electrical signal. | 12-05-2013 |
20140105613 | METHOD OF OPTICAL INTERCONNECTION OF DATA-PROCESSING CORES ON A CHIP - The invention provides optical interconnects of data-processing cores of multicore chips by means of digital planar holographic microchips. The method comprises delivering “N” laser lights to “N” data-processing cores on the host chip, coding the obtained optical signals by modulating them with the core-generated data, and then delivering the modulated and coded optical signals to a holographic microchip formed on the same substrate of the host chip as the data-processing cores, splitting the modulated and coded optical signals into (N-1)N modulated optical copy signals, delivering the copy signals to all data-processing cores except the one that generates the copy signals, and decoding the data obtained from the output signals delivered to the processing cores by the receivers. The method is efficient in that it allows replacing electrical interconnects between the cores with optical interconnects and can be matched to current semiconductor production technology. | 04-17-2014 |
20140255044 | GRAPHENE PLASMONIC COMMUNICATION LINK - A signal transfer link includes a first plasmonic coupler, and a second plasmonic coupler spaced apart from the first plasmonic coupler to form a gap. An insulator layer is formed over end portions of the first and second plasmonic couplers and in and over the gap. A plasmonic conductive layer is formed over the gap on the insulator layer to excite plasmons to provide signal transmission between the first and second plasmonic couplers. | 09-11-2014 |
20140355999 | OPTICAL SIGNAL TRANSMISSION DEVICE APPLYING ALTERNATIVE AND SELECTABLE TRANSMISSION PATHS - An optical signal transmission device is used for transmitting optical light rays from a number of light emitters to a number of light receivers, and includes a substrate, a number of first optical waveguide elements, a number of second optical waveguide elements, a number of reflectors, and an integrated circuit. The substrate has a first side surface for positioning the light emitters, and a second side surface for positioning the light receivers. The light emitters and the light receivers are corresponding to the first optical waveguide elements. The second optical waveguide elements intersect with the first optical waveguide elements to form a number of hollow junctions for receiving the reflectors. Each reflector can rotate around a rotating shaft thereof in the corresponding hollow junction to change the optical transmission path of light rays from the light emitters. The integrated circuit controls rotating angles of the reflectors. | 12-04-2014 |
20150030338 | OPTICAL COMMUNICATION FIBER, OPTICAL COMMUNICATION MODULE, AND OPTICAL COMMUNICATION SYSTEM - An optical communication fiber includes: a fiber body having a tip surface; and a light absorption layer provided to the tip surface of the fiber body, and configured to reduce light transmittance of communication light. | 01-29-2015 |
20150063824 | OPTICAL FIBER TRANSMISSION LINE - An optical fiber transmission line capable of minimizing the total splice loss per one span thereof. One span of an optical fiber transmission line provided between repeaters has two connection fibers and (N+1) number of optical transmission fibers. The optical connection fibers and are single mode optical fibers (SSMF) based on International standard ITU-T G.652 standard. (N+1) number of the optical transmission fibers are connected in series in order between the two optical connection fibers. The total splice loss α | 03-05-2015 |
20150104188 | ACTIVE BEAM SHAPING SYSTEM AND METHOD USING SEQUENTIAL DEFORMABLE MIRRORS - An active optical beam shaping system includes a first deformable mirror arranged to at least partially intercept an entrance beam of light and to provide a first reflected beam of light, a second deformable mirror arranged to at least partially intercept the first reflected beam of light from the first deformable mirror and to provide a second reflected beam of light, and a signal processing and control system configured to communicate with the first and second deformable mirrors. The first deformable mirror, the second deformable mirror and the signal processing and control system together provide a large amplitude light modulation range to provide an actively shaped optical beam. | 04-16-2015 |
20150110500 | MACH-ZEHNDER TYPE OPTICAL MODULATOR, OPTICAL TRANSMISSION/RECEPTION SYSTEM AND CONTROL METHOD OF MACH-ZEHNDER TYPE OPTICAL MODULATOR - A Mach-Zehnder type optical modulator according to the present invention is characterized by: that it comprises a beam splitting unit for splitting input light into two component light beams, a first waveguide and a second waveguide for guiding respective ones of the split component light beams, a beam combining unit for combining together the component light beams guided respectively by the first and second waveguides and outputting the combined light, a plurality of electrodes which are formed into electrode pairs as a result of being arranged on the first and second waveguides in a symmetric and parallel manner, and driving units for differentially driving respective ones of the electrode pairs in accordance with the magnitude relationships between the voltage of an input signal and respective ones of threshold voltages set individually for the electrode pairs; and that, by thus being driven differentially, the plurality of electrodes each apply a voltage for modulating the input light to the waveguide on which they are arranged. | 04-23-2015 |
20150295647 | BIDIRECTIONAL DATA COMMUNICATIONS CABLE - A bidirectional data communications cable is disclosed. The cable includes first connector, second connector, and cable housing coupled to the first and second connectors. The first connector includes a controller configured to determine whether the first connector is connected to a data source or data sink. If connected to a data source, the controller configures a switch circuit to route a data signal from the data source to an optical modulator for modulating an optical signal for transmission from the first to the second connector via an optical fiber. If connected to a data sink, the controller configures the switch circuit to route a data signal from an optical demodulator to the data sink, the optical demodulator receiving an optical signal modulated with the data signal from the second connector via an optical fiber. The second connector is configured similar to the first connector. The cable housing encloses the optical fibers. | 10-15-2015 |
20150358081 | OPTICAL FIBER COMMUNICATION METHOD AND SYSTEM - An optical fiber communication method includes the steps of: providing an optical fiber that includes a core, and a second-order Bragg grating structure formed on the core; and emitting a data-carrying optical signal to an outer peripheral surface of the optical fiber that corresponds to the second-order Bragg grating structure in a radial direction of the optical fiber, so that the data-carrying optical signal is coupled into the core of the optical fiber via the second-order Bragg grating structure for transmission therein. | 12-10-2015 |
20150365169 | OPTICAL ABSORPTION BASED DEVICE - Embodiments of the present disclosure are directed toward techniques and configurations for an optical absorption based device using a semiconductor-dielectric-semiconductor structure. In one embodiment, the device may include an optical waveguide to transmit light inputted by a light source. The waveguide may include a first semiconductor layer, a second semiconductor layer disposed above the first semiconductor layer, a dielectric layer disposed between the first and second semiconductor layers, and an absorptive material layer disposed between the dielectric layer and the first or second semiconductor layer. The absorptive material layer may have a variable light absorption coefficient to allow intensity of light to be modulated through modulation of the absorption coefficient. The light may be substantially confined between the first and second semiconductor layers of the waveguide. Other embodiments may be described and/or claimed. | 12-17-2015 |
20160013622 | OPTICAL APPARATUS PROVIDING OPTICAL AMPLIFIER UNIT PLUGGABLY RECEIVING EXTERNAL OPTICAL FIBER | 01-14-2016 |
20160091678 | OPTICAL CONNECTOR - An electronic device having an optical connector that provides and/or receives optical signals through openings or perforations formed at an external surface of the electronic device. These openings can serve as the interface of the optical connector through which the electronic device can engage in one-way or two-way communication with corresponding optical connectors of other electronic devices. These openings can be sized such that they are not visible or not easily visible with the naked human eye. As such, these openings can be too small for communicating with corresponding optical connectors using any single one of these openings. But light that is collectively transmitted through or received through a group of these openings can provide optical signals that can be used to communicate with corresponding optical connectors using optical signals. | 03-31-2016 |
20160170135 | OPTICAL WAVEGUIDE AND OPTICAL FIBER TRANSMISSION SYSTEM | 06-16-2016 |
20220140911 | BI-DIRECTIONAL SIGNAL INTERFACE WITH SUPPRESSION OF REFLECTED SIGNALS - A bi-directional signal interface includes a first and second port configured to pass transmit RF signals and receive RF signals. A MZI includes a first traveling wave electrode connected to the first bidirectional signal port and a second traveling wave electrode connected to the second bidirectional signal port. A coupler has an input connected to a transmit input port, a first output connected to the first traveling wave electrode, and a second output connected to a second end of the second traveling wave electrode. A laser provides an optical signal to the MZI. An optical filter is coupled to an output of the MZI and preserves the optical carrier and the modulation sideband at the second frequency and rejects the modulation sideband at the first frequency. A detector converts light received from the filter to the receive RF signal and a suppressed level of the transmit RF signal. | 05-05-2022 |
398143000 | Multimode | 12 |
20080226298 | Optical Transmission System - The present invention has been achieved to provide a novel optical transmission system realizing high-speed optical transmission over greater distance by suppressing waveform degradation caused by mode dispersion and mode transition in a multimode optical transmission line. The optical transmission system of the present invention includes: an optical transmitter for transmitting incoherent light; an excitation mechanism for exciting a predetermined mode in the incoherent light transmitted from the optical transmitter; a multimode optical transmission line for transmitting the incoherent light transmitted from the excitation mechanism; a transmission mechanism for transmitting a predetermined mode in the incoherent light transmitted from the excitation mechanism; and an optical receiver for receiving the incoherent light transmitted from the transmission mechanism or the incoherent light transmitted from the transmission mechanism. | 09-18-2008 |
20100098431 | Multimode Optical Fiber With Low Differential Mode Delay - An optical multimode fiber including a graded index core and an extended gradient core which has a negative refractive index difference with respect to the cladding. The fiber improves the bandwidth, reliability and complexity of the telecommunication systems that are based on multimode fibers. The fiber reduces the differential mode delay among modes. The fiber thereby allows achieving large bandwidth even in the case when the highest order modes are excited. This has positive effects to the conditions that need to be fulfilled by the components such as optical sources, connectors, fiber couplers, other optical components, cables, etc. The fiber eliminates negative impact of the cladding that allows for reduction of fiber core size and the difference between the cladding and the core and thereby allows for achieving the larger bandwidth of optical fiber at lower fiber production cost. | 04-22-2010 |
20100142969 | Multimode Optical System - Disclosed is an optical system including a polychromatic optical source emitting multiple transverse modes, an optical link having at least one portion of multimode optical fiber, and an optical device positioned between the optical source and the input of the multimode optical fiber. The optical device can modify the distribution of the energy coupling of the transverse modes emitted by the source in the propagation modes of the multimode optical fiber. | 06-10-2010 |
20110002694 | OPTICAL DATA TRANSMISSION APPARATUS - An optical data transmission apparatus is provided, in which a first communication unit | 01-06-2011 |
20120195600 | REFERENCE-SIGNAL DISTRIBUTION IN AN OPTICAL TRANSPORT SYSTEM - An optical transport system has an optical transmitter and an optical receiver coupled to one another via an optical link having a plurality of transmission paths. The optical transmitter uses at least one of the transmission paths to transmit an optical-reference signal that enables the optical receiver to obtain (i) an optical local-oscillator signal that is phase- and frequency-locked to an optical-carrier frequency used by the transmitter for the generation of data-bearing optical signals and (ii) a clock signal that is phase- and frequency-locked to the clock signal used by the transmitter. The optical receiver then uses these signals to demodulate and decode the data-bearing optical signals in a manner that significantly reduces the complexity of digital signal processing compared to that in a comparably performing prior-art system. In various embodiments, a transmission path for the optical-reference signal can be established using any suitable dimension orthogonal to those occupied by the data-bearing signals, such as polarization, wavelength, or space. | 08-02-2012 |
20120224861 | DYNAMIC SPATIAL-MODE ALLOCATION IN AN UNDER-ADDRESSED OPTICAL MIMO SYSTEM - The outage probability in an under-addressed optical MIMO system may be reduced by configuring a spatial-mode coupler at a transmitter and/or a spatial-mode separator at a receiver to dynamically change its spatial-mode configuration on a time scale that is shorter than the channel coherence time. Provided that the MIMO system employs an FEC code that has a sufficient error-correcting capacity for correcting the amount of errors corresponding to an average state of the MIMO channel established between the transmitter and receiver, this relatively fast dynamic change tends to reduce the frequency of events during which the number of errors per FEC-encoded block of data exceeds the error-correcting capacity of the FEC code. | 09-06-2012 |
20130064554 | Optical Transmission Using Few-Mode Fibers - In some embodiments, an optical transmission system includes a few-mode fiber that supports at least 2 spatial modes but no more than 50 spatial modes. | 03-14-2013 |
20130236193 | Optical Communications Systems that Couple Optical Signals from a Large Core Fiber to a Smaller Core Fiber and Related Methods and Apparatus - Fiber optic communications systems are provided that include an optical transmission source that is configured to transmit an optical signal having a first wavelength onto a multi-mode optical transmission path, an optical mode field converter that is optically coupled to the multi-mode optical transmission path, and an optical transmission medium that is optically coupled to the optical mode field converter. The multi-mode optical transmission path has a first cross-sectional area and the optical transmission medium has a second cross-sectional area that is smaller than the first cross-sectional area. The optical transmission medium is a few-mode transmission medium for the optical signal having the first wavelength. | 09-12-2013 |
20140126915 | METHOD OF REDUCING THE MODAL GROUP DELAY IN A MULTIMODE TRANSMISSION SYSTEM - Systems and methods for reducing modal group delay when transmitting a plurality of optical signals over a transmission line that supports a plurality of modes are disclosed. The modes are converted at a plurality of positions along the transmission line so the signals in the end have minimal group delay. The method comprises the steps of receiving N number of optical signals into a multimode fiber having at least N modes, transmitting each of N signals into a mode of the at least N modes of the multimode fiber, and converting each of the N modes into another of the N modes at N positions along the transmission line, such that the net modal group delay generated between the N signals along the transmission line is minimized. | 05-08-2014 |
20140286648 | OPTICAL MIMO PROCESSING - A technique is provided for an optical multiple input multiple output (MIMO) processing system. The optical (MIMO) processing system includes an interface to a multi-mode fiber at a first end of the optical processing system; M first single-mode waveguides coupled to the interface; wherein the first waveguides are arranged to carry M first optical signals, respectively; N second single-mode waveguides at a second end of the optical processing system, wherein the second waveguides are arranged to carry N second optical signals, respectively, wherein the N second optical signals are associated with N modes carried by the multi-mode fiber; and an optical processing core arranged to transform the first optical signals into the second optical signals such that a correlation between the second optical signals is decreased compared to a correlation between the first optical signals using a plurality of optical couplers for coupling each of the M first optical signals with one another, such that each of the N second optical signals is a linear combination of all of the M first optical signals. | 09-25-2014 |
20150333829 | MULTIMODE OPTICAL FIBER TRANSMISSION SYSTEM INCLUDING SINGLE MODE FIBER - Some embodiments of the disclosure relate to an optical transmission system that operates at a wavelength in the range from 950 nm to 1600 nm and that employs a single-mode optical transmitter and an optical receiver optically coupled to respective ends of a multimode fiber designed for 850 nm multimode operation. The optical transmission system also employs at least one single mode fiber situated within the optical pathway between the optical transmitter and the receiver and coupled to the multimode fiber. | 11-19-2015 |
20160091660 | QUASI-SINGLE-MODE OPTICAL FIBER WITH A LARGE EFFECTIVE AREA - A quasi-single-mode optical fiber with a large effective area is disclosed. The quasi-single-mode fiber has a core with a radius greater than 5 μm, and a cladding section configured to support a fundamental mode and a higher-order mode. The fundamental mode has an effective area greater than 170 μm | 03-31-2016 |
398144000 | Monomode | 2 |
20090016736 | Systems and methods for transmitting quantum and classical signals over an optical network - Systems and methods for transmitting quantum and classical signals over an optical network are disclosed, wherein the quantum signal wavelength either falls within the classical signal wavelength band, or is very close to one of the classical signal wavelengths. The system includes a deep-notch optical filter with a blocking bandwidth that includes the quantum signal wavelength but not any of the classical signal wavelengths. The deep-notch optical filtering is applied to the classical signals prior to their being multiplexed with the quantum signals to prevent noise generated by the classical signals from adversely affecting transmission of quantum signals in the transmission optical fiber. Narrow-band filtering is also applied to the quantum signals prior to their detection in order to substantially exclude spurious non-quantum-signal wavelengths that arise from non-linear effects in the optical fiber. The present invention allows for the quantum and classical signals to have wavelengths within just a few nanometers of one another, which has benefits for both classical and quantum signal transmission on a common transmission optical fiber. | 01-15-2009 |
20160154175 | OPTICAL TRANSMISSION SYSTEMS AND METHODS USING A QSM LARGE-EFFECTIVE-AREA OPTICAL FIBER | 06-02-2016 |
398145000 | Redundant fibers | 1 |
20080226299 | OPTICAL TRANSMISSION APPARATUS - An optical transmission apparatus includes redundant line cards each having a plurality of ports, a hardware unit and a CPU. The hardware unit obtains failure information on redundant lines for each port. The CPU determines switching control of the redundant lines based on the failure information. Then, the hardware unit switches the redundant lines based on the switching control determined by the CPU, so as to transmit an SDH/SONET optical signal in a ring network. The CPU of one of the line cards is set as a master CPU on the corresponding line card to control switching of the redundant lines. Further, the CPU of the other line card is set as a slave CPU. | 09-18-2008 |