Entries |
Document | Title | Date |
20080226288 | METHOD AND APPARATUS FOR PERFORMING RECEIVER SENSITIVITY TESTING AND STRESSED RECEIVE SENSITIVITY TESTING IN A TRANSCEIVER - An apparatus and method are provided for use in a transceiver that enable the transceiver to test itself to determine whether the receiver portion of the transceiver meets receiver sensitivity requirements and stressed receive sensitivity requirements. | 09-18-2008 |
20080232794 | PON WITH DISTRIBUTED VIRTUAL PORT LOOPBACK - A passive optical network (PON) access network connected to an external data network can be tested using a remote test host operating on the external data network by looping test data from the test host through the PON to an Optical Network Terminator (ONT), through a data path between an ONT test port and an ONT user port, and back through the PON to the test host. Data tunneling is used to route the data through the external data network between the test host and the PON Optical Line Terminal (OLT). The invention can be used to emulate downstream as well as upstream PON traffic for remote diagnostic testing or other purposes. | 09-25-2008 |
20080240711 | Optical Network Evaluation Systems and Methods - Embodiments of optical network evaluation systems and methods are disclosed. One system embodiment, among others, comprises a processor configured with logic to provide a cross layer model of disturbance propagation in an optical network based on a combination of a physical layer model and a network layer model, the physical layer mode based on the disturbance propagation having a threshold effect only on nodes along a route followed by the disturbance. | 10-02-2008 |
20080240712 | METHOD AND SYSTEM OF MONITORING A DATA TRANSMISSION LINK, PARTICULARLY AN OPTICAL, BIDIRECTIONAL DATA TRANSMISSION LINK - Systems and methods for monitoring a data transmission link, especially an optical, bidirectional data transmission link, in which a digital transmit signal is transmitted on a first transmission path from a local end of the data transmission link toward a remote end of the data transmission link. A portion of the power of the transmit signal sent at the local end is transmitted, delayed by a non-zero delay time on a second transmission path as a control signal toward the remote end of the data transmission link. Both signals are received at the remote end and are tested for the presence of events of a predetermined type. A conclusion can be reached on the quality of the transmission link as a function of a time correlation and frequency of the appearance of events in the received transmit signal and in the received control signal. | 10-02-2008 |
20080285969 | Optical transmission method and device - In an optical transmission method and device of a point-multipoint type, whether or not identification information of an optical network unit designated is received within a fixed phase tolerance for a transmission enabling phase designated to optical network units on multipoint sides is determined. When it is determined that no identification information of the optical network unit designated is received and identification information of any optical network unit is received up to a transmission enabling phase subsequently designated, a transmission stop command is transmitted to the optical network unit whose identification information is received. Also, when abnormality is detected in transmitted data from the optical network unit designated or any optical network unit within a transmission enabling duration designated for the transmission enabling phase designated to the optical network units, a transmission enabling duration reducing command is transmitted to the optical network unit or all of the optical network units respectively. Thereafter, when the identification information of the optical network unit designated is received within a fixed phase tolerance for the transmission enabling phase designated to the optical network units and identification information of another optical network unit is also received up to a transmission enabling phase subsequently designated, a transmission stop command to the other optical network unit and a command for restoring the transmission enabling duration for the optical network unit and all of the optical network units are transmitted. | 11-20-2008 |
20080292311 | Intelligent Transmitter Module - An intelligent transmitter module (“ITM”) includes a CDR circuit for equalizing and retiming an electrical data signal, a driver for generating a modulation signal and/or performing waveform shaping of the equalized and retimed signal, and an optical transmitter configured to emit an optical signal representative of the data signal. A linear amplifier may also be included to amplify the modulation signal when the optical transmitter is a laser with managed chirp. Alternately or additionally, a microcontroller with a 14-bit or higher A2D can be included to control and optimize operation of the ITM. In one embodiment, the CDR, driver, linear amplifier, and/or microcontroller are flip chip bonded to a first substrate while the laser with managed chirp is bonded to a second substrate. The first substrate may comprise a multi-layer high frequency laminate. | 11-27-2008 |
20080310835 | SYSTEM FOR VALIDATING INSTALLATION OF OPTICAL NETWORK DEVICES - A system for validating installation of optical network devices is disclosed. A system that incorporates teachings of the present disclosure may include, for example, an optical network device (OND) having a controller element to receive a work order from a monitoring device coupled to the OND, transmit the work order and identification data to an optical management device (OMD), receive an installation status report from the OMD based on a comparison of the identification data and validation data retrieved according to the work order, and transmit the installation status report to the monitoring device. Additional embodiments are disclosed. | 12-18-2008 |
20080310836 | Manufacturing System and Method Using IR Communications Link - An automated test system for testing devices being manufactured comprises an infrared communications link for free space communications between a host and a device under test. The communications link is asymmetric and instructions from the host are acknowledged by the device. The instructions cause the device to operate, and the output of the device is monitored, logged, and compared to acceptance criteria. The host can then generate calibration messages to the device, to change the device operating characteristics as appropriate. The communications link uses an unmodulated data stream together with asynchronous handshaking and a robust checksum algorithm to ensure accurate communication. | 12-18-2008 |
20090010641 | METHOD AND APPARATUS FOR LOADING, DETECTING, AND MONITORING CHANNEL-ASSOCIATED OPTICAL SIGNALS - A method and apparatus for loading, detecting, and monitoring channel-associated signals are provided. Channel-associated signals are identified with spread spectrum codes in the electrical domain, and after being modulated to an optical service signal at respective loading points separately, the channel-associated identification signals are transmitted in the optical channel along with the optical signal. At any downstream detecting point, passing optical signals can be converted through photoelectric conversion, and the channel-associated identification signals are de-spread. By detecting the channel-associated signals, it is possible to learn about whether the upstream loading point work normally, whether the optical channel operates normally, etc., and thereby to find possible failures, solve problems, and monitor quality parameters of optical signals in real time, and improve reliability of the optical signal transmission. | 01-08-2009 |
20090010642 | METHOD FOR MEASURING FIBER LENGTH, OPTICAL LINE TERMINAL AND OPTICAL NETWORK SYSTEM - A method for measuring fiber length, an optical line terminal and an optical network system. The method for measuring fiber length according to the embodiment of the present invention includes the following steps: Sending the first message to an optical network device at the subscriber side; —Receiving the second message, which is a response returned by the optical network device at the subscriber side to the first message; —Determining the duration between sending the first message and receiving the second message; Calculating the length of the fiber to the optical network device at the subscriber side according to the above-mentioned duration and the information related to the processing delay of the optical network device at the subscriber side, wherein the information related to the processing delay of the optical network device at the subscriber side includes the actual response time of the optical network device at the subscriber side. | 01-08-2009 |
20090016712 | Optical signal quality monitor for a high-bit rate signal - An optical signal quality monitor includes a splitter splitting an input optical signal into two signals; a low-frequency converter converting one split optical signal to a low frequency signal by modulating the optical signal with a frequency offset signal; and an intensity ratio calculator calculating an intensity ratio between the low frequency signal and the other split optical signal, thereby appropriately confirming the quality of a high-bit rate optical signal. The monitor includes plural processing lines, each line including the splitter, the low-frequency converter, and the intensity ratio calculator. At least one line includes an optical noise superimposer superimposing optical noise on the one split signal before inputted to the converter or an optical band-pass filter transmitting the one split signal before inputted to the converter. The monitor includes a polarization state changer changing the polarization state of the input signal before inputted to the splitter. | 01-15-2009 |
20090060494 | Light emitter controlling - Embodiments related to light emitter control are described and depicted. | 03-05-2009 |
20090103916 | OPTICAL CHASSIS MONITORING - Systems and methods for processing event data provided by a managed device which includes a plurality of components. One or more components are identified based on the event data, providing, for example, more accurate information for purposes of network management and equipment maintenance. Applications include the identification of one or more optical modules within an SNMP-managed optical chassis in a hybrid-fiber-coaxial cable-television network. | 04-23-2009 |
20090154918 | DATA TRANSPORT SYSTEM WITH AN EMBEDDED COMMUNICATION CHANNEL - A network comprising at least one host device having an interface card connected to a backplane of said host device, wherein said interface card comprises at least one cage for receiving a pluggable module which provides at least one embedded communication channel which exchanges performance monitoring data and configuration data between said pluggable module and a far end device. | 06-18-2009 |
20090162051 | Wireless Tuning and Reconfiguration of Optoelectronic Modules - A method for adjusting a communications transmission characteristic, such as the optical wavelength, in an optoelectronic module having a tunable laser subassembly 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; and 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. | 06-25-2009 |
20090175617 | Apparatus and Method for Commissioning an Optical Transmission System - An apparatus and method directed to testing and optimizing performance of an optical transmission system is disclosed, including at least one broadband dispersion compensation unit (DCU) or at least one depolarization device. The depolarization device may be used alone or in combination with the at least one broadband DCU. A method for optimizing performance of data channels in initial loading (IL) and full loading (FL) configurations of the optical transmission system is also disclosed. | 07-09-2009 |
20090269052 | PORTABLE DEVICE FOR FIBRE CHANNEL CONFIGURATION AND ANALYSIS - Apparatus, method, and computer program product embodiments for analyzing and configuring a fibre channel link and topology using a portable device are provided. A network microchip is programmed to select at least one of an available plurality of operating modes based on a first user input. The plurality of operating modes include a manual speed selection mode for manually selecting a link speed based on a second user input, an auto speed selection mode for automatically negotiating a highest supported link speed, an auto topology negotiation mode for discovering and reporting all possible port configurations, and a manual topology selection mode for selecting a fibre channel topology based on a third user input. | 10-29-2009 |
20100014853 | Method and Apparatus for End of Life Small Form-Factor Pluggable (SFP) - A method, system and computer-usable medium are disclosed for visually indicating the remaining life of a small form factor pluggable (SFP) optical transceiver module. The total number of optical light pulse signals processed by an SFP are compared to a predetermined lifecycle number of signals that can be processed before the SFP enters a failed operating state. The remaining life of the SFP is calculated. A first display visually indicates that the total number of processed signals has not exceeded the lifecycle number of signals. A second display located on the SFP enclosure visually indicates the SFP has reached the end of its lifecycle. | 01-21-2010 |
20100027991 | OPTICAL TRANSCEIVER WITH LED LINK INFORMATION INDICATOR - Exemplary embodiments of the invention relate to an analyzer device configured to interface with an optical transceiver module having a diagnostic communications port, wherein the port is configured to access diagnostic and other data contained within the transceiver controller via a backdoor interface. Controller data, including operational parameter values and module setup values, is accessible while the transceiver operates in conjunction with an external host and may be retrieved, and sometimes modified, in real time without interrupting normal transceiver operation or suspending the transmission of data over optical fibers. The analyzer device accesses the data via the diagnostic communications port on the outside of the transceiver module. | 02-04-2010 |
20100054732 | Method and System for Monitoring and Servicing Devices Based on One-Wire Infrared Communication - A digital signal is sent by a one-wire digital input/output unit of a one-wire IR communication system at the side of the dedicated device to an IR transmitting element, a working range is established in which the IR signal is sent, which is received at the side of the target device by an IR receiving element of the one-wire IR communication system of the target device, and the IR signal is sent by the one-wire digital input/out of the IR system across the main communication trunk to the modules of the target device. The system has a one-wire infrared communication system installed in a dedicated device and a target device, containing a one-wire digital input/output of the system, connected to a separator/amplifier unit with RxD and TxD lines, while the one-wire input/output of the system at the side with the dedicated device is connected to units of the testing system of the device and at the side with the target device the one-wire digital input/output of the system is connected directly by the main communication trunk to the modules of the target device. | 03-04-2010 |
20100061721 | METHOD AND SYSTEM FOR ADJUSTING NETWORK INTERFACE METRICS - An approach is provided for adjusting network interface metrics to optimize transmissions across a network. A measurement of performance of a network interface is made, wherein the network interface is configured to provide traffic across an optical network. A determination is made regarding whether the measured performance satisfies a predetermined threshold. A network metric value of the network interface is adjusted if the measured performance of the network interface satisfies the predetermined threshold. | 03-11-2010 |
20100124418 | TRANSMISSION OF EYE INFORMATION FROM OPTO-ELECTRONIC MODULES - A method of controlling communication between transceivers includes transmitting payload data from a transmitter of a first transceiver in a data channel of a physical link to a receiver of a second transceiver, the second transceiver further including an equalizer, varying equalizer settings in the equalizer, analyzing effects of varying equalizer settings to determine transmitter diagnostic settings for the first transceiver, and transmitting the transmitter diagnostic settings from a transmitter of the second transceiver in an out-of-band channel of a physical link to a receiver of the first transceiver a second transceiver in a data channel. | 05-20-2010 |
20100129071 | Wavelength division multiplexed systems with optical performance monitors - The specification describes optical performance monitors which are simplified by coupling single tunable optical filters to multiple channels being monitored. Optical measurements for more than one channel may be made simultaneously. The optical system architecture is preferably an optical performance monitor for a WDM system. In a system designed according to the invention n channels may be monitored using n photodetectors, n optical splitters, but only n/2 tunable optical filters. Additional system simplification may be obtained using optical switching elements coupled to the optical splitters. | 05-27-2010 |
20100135651 | METHOD AND DEVICE FOR LOCATING A COMMUNICATION SOURCE AND MOBILE COMMUNICATION SYSTEM USING ONE SUCH DEVICE - Method for locating an optical radiation source of the kind in which receivers like infrared receivers are used in an on/off mode, characterized in that it consists in:
| 06-03-2010 |
20100158513 | APPARATUS AND METHOD FOR MEASURING SIGNAL PERFORMANCE AND APPARATUS FOR SELECTING SIGNAL - Provided are an apparatus and method for measuring signal performance and an apparatus for selecting a signal. The apparatus includes a wavelength selector selecting a signal having a specific wavelength from an input signal, a time selector selecting a signal input at a specific time from the selected signal having the specific wavelength, and a performance measurer measuring signal performance for the signal of the specific wavelength that is input at the specific time and selected by the time selector. Thus, it is possible to measure signal quality of each wavelength-division multiplexing (WDM)-time-division multiplexing (TDM) channel in a WDM-TDM hybrid environment. | 06-24-2010 |
20100166420 | APPARATUS AND METHOD FOR CONTROLLING ROUTE AND RESOURCE IN PACKET-OPTIC CONVERGENCE NETWORK - There is provided a method of controlling routes and resources in a packet-optic convergence network. The method includes receiving PTL route information between edge devices of the packet-optic convergence network, in which the PTL route information is provided through a route management system; monitoring a resource use state according to PTL route in the process of reserving, changing, or releasing resources in response to a request for the reservation, change, or release of the resources by a service control system; and changing PTL routes or resources allocated to the PTL routes through the route management system on the basis of the resource use state according to PTL route, thereby ensuring greater stability in providing an IP premium service with a Quality of Service (QoS) guarantee. | 07-01-2010 |
20100183293 | APPARATUS AND METHODS FOR INDICATING THE OPERATIONAL CONDITION OF A COMMUNICATION DEVICE - A communication interface module is disclosed, wherein the module may include a circuit board having an electronic communication interface and an optical communication interface; a light source disposed on the circuit board, wherein the light source is indicative of a status of at least one operational condition of the module; a module cover coupled to the circuit board; and a light path extending from the light source on the circuit board to a portion of the module cover visible to a human operator. | 07-22-2010 |
20100209100 | OPTICAL RECEIVER - The present invention provides an optical receiver able to monitor the level of the optical input signal in accurate even when the level is quite small. The optical receiver comprises a photodiode to generate a photocurrent Ipd, a current mirror circuit to reflect the photocurrent into a mirrored current Imon, a current-to-voltage converter to convert the mirrored current Imon to a voltage signal, switch to connect/cut the current mirror circuit with the current-to-voltage converter, and a correction unit for subtracting a signal when the switch is connected from a signal when the switch is cut. | 08-19-2010 |
20100247093 | CUTOFF WAVELENGTH MEASURING METHOD AND OPTICAL COMMUNICATION SYSTEM - A method includes a first step of joining a multimode fiber to a first end of an optical fiber being a specimen, allowing light to propagate from the multimode fiber to the specimen, measuring an intensity of light from a second end of the specimen, and determining a first power spectrum; a second step of joining the multimode fiber to a first end of a reference fiber having bending loss higher than that of the specimen, allowing light to propagate from the multimode fiber to the reference fiber, measuring an intensity of light from a second end of the reference fiber, and determining a second power spectrum; a third step of determining a difference spectrum by subtracting the second power spectrum from the first power spectrum; and a fourth step of determining a higher-order mode cutoff wavelength of the specimen on the basis of a shape of the difference spectrum. | 09-30-2010 |
20100278527 | OPTICAL NETWORK TERMINAL POWER FAILURE MANAGEMENT - Optical network terminal (ONT) power failure management. A system for permitting a customer of a telecommunication company, for whom fiber to the premises (FTTP) has been installed, to control operating features associated with operation of a battery backup unit (BBU) which is used, during power failure, for powering the ONT associated with the FTTP installation and the customer's telephone(s). The controlling of these features includes utilization of signal-controlled switches, which are manually over-rideable by the customer, thereby providing the desired operating feature control. | 11-04-2010 |
20100329667 | INTERFEROMETER, DEMODULATOR, AND OPTICAL FIBER COMMUNICATION MODULE - In a delay line interferometer inside a demodulator, with respect to polarization states of two split beams of light to be interfered with each other, p polarization and s polarization are reversed by a half beam splitter and, further, again multiplexed by the half beam splitter used for splitting so that interference beams of light are generated. | 12-30-2010 |
20110044684 | Optical switch and optical waveform monitoring device utilizing optical switch - The polarization direction of an optical signal is changed by a polarization controller so as to be orthogonal to a main axis of a polarizer. A control pulse generator generates control pulses from control beam with a wavelength which is different from the wavelength of the optical signal. The optical signal and the control pulse are input to a nonlinear optical fiber. In the nonlinear optical fiber, the optical signal, during a time period in which the optical signal and the control pulse coincide, is amplified with optical parametric amplification around a polarization direction of the control pulse. The optical signal, during the time period in which the optical signal and the control pulse coincide, passes through the polarizer. | 02-24-2011 |
20110069950 | OPTICAL COMMUNICATION TRANSMISSION SYSTEM AND METHOD FOR CHECKING PERFORMANCE OF OPTICAL COMMUNICATION TRANSMISSION SYSTEM - To detect the performance degradation of an optical communication transmission system after it becoming operational, thereby preventing the reliability of the system from lowering. In an optical communication transmission system, one of optical transmitter-receivers in a redundant-structured system is an active optical transmitter-receiver, and the other optical transmitter-receiver is a standby optical transmitter-receiver. The optical transmitter-receiver includes a loopback device through which the signal light of a transmitting section of the optical transmitter-receivers is inputted to a receiving section, and an operating-system switching scheduling device for regularly switching the operating system is provided. Further, there is also provided a performance check scheduling device which operates the loopback device of the standby-system optical transmitter-receiver at a prescribed timing determined in advance to start the performance check processing by the transmitting section and the receiving section of the optical transmitter-receiver. | 03-24-2011 |
20110076010 | TCM PATH SEARCH METHOD, TCM PATH CREAETION METHOD, PATH SEARCH MANAGEMENT SYSTEM, AND PATH CREATION MANAGEMENT SYSTEM - A Tandem connection monitoring (TCM) path search method, a TCM path creation method, a path search management system, and a path creation management system are provided. The source end TCM mode and the sink end TCM mode at a single level of each node in an Optical Channel Data Unit-k (ODUk) path are acquired; and a TCM path at the single level between nodes in the ODUk path is calculated according to the source end TCM mode and the sink end TCM mode at the single level of each node that are acquired. TCM level information and the sink end TCM mode of a second node for TCM path creation between a first node and the second node are acquired by specifying the first node and the second node; and a TCM path between the first node and the second node that are specified is created and stored. | 03-31-2011 |
20110200323 | INFORMATION TRANSFER AND RECEIVING METHOD, SYSTEM, AND DEVICE - The information transfer method includes: determining an indicator of a start bit in a protection time slot or a preamble time slot of a laser, and establishing a communication channel according to the indicator of the start bit; inserting Operation Administration and Maintenance (OAM) information of a Long Reach-Passive Optical Network (LR-PON) device into an upstream frame sent to an Optical Line Terminal (OLT) device by the LR-PON device at a position indicated by the indicator of the start bit, and transporting the upstream frame to the OLT device through the communication channel. Therefore, OAM functions of the LR-PON device are extended, so that the OAM information can be transported by the LR-PON device independently, and OAM characteristics of the LR-PON device are enhanced. For example, PON protection is better supported, and the speed and success ratio of protection switching of a PON system are increased. | 08-18-2011 |
20110206366 | OPTOELECTRONIC SENSOR - An optoelectronic sensor, comprising a first strip having transmitter elements and/or receiver elements, a second strip having transmitter elements and/or receiver elements, wherein the transmitter elements of one strip form transmitter/receiver pairs with receiver elements of the other strip for the formation of a protective field, and an evaluation unit for the evaluation of the received light of the receiver elements, wherein a light beam between the transmitter elements and receiver elements counts as interrupted when received light falls below a first lower switching threshold and as not interrupted when a first lower switching threshold is exceeded and wherein an object detection signal can be transmitted when at least one light beam is interrupted, characterized in that for the evaluation of the received light of at least one receiver element a second upper switching threshold is provided in the evaluation unit the value of which lies above the value of the first lower switching threshold, with a signal to indicate bypass light being given when the value of the received light lies above the second upper threshold. | 08-25-2011 |
20110268436 | SECURE FIBER OPTIC COMMUNICATION SYSTEMS AND METHODS - The present disclosure relates to fiber optic networks carrying sensitive information such as classified government communications, sensitive financial information, proprietary corporate information, and associated systems and methods for secure transmission where fiber tampering is easily detected. The present invention provides improved security systems and methods for fiber optic communication links. Specifically, a hollow-core photonic bandgap fiber is deployed as a transmission medium. A secure fiber optic communication link is established over the hollow-core photonic bandgap fiber with a monitoring mechanism. The monitoring mechanism is configured to detect large losses and large spectral variability each indicative of loss introduced by malicious intrusion attempts. Further, the monitoring mechanism allows easy differentiation of intrusion relative to normal system variations thereby reducing false positives and missed intrusions. | 11-03-2011 |
20120008938 | Data Transmission Systems and Methods - A data transmission system and method are provided. The data transmission system includes a first link partner and an optical transceiver unit. The first link partner includes a controller. When the first link partner is in an abnormal operation mode, the controller controls the first link partner to exit from the abnormal operation mode. The optical transceiver unit is coupled between the first link partner and a second link partner and performs data transmission between the first link partner and the second link partner. According to the data transmission system and method, one link partner can accurately detect whether another link partner is coupled to the one link partner through an optical transceiver unit. Accordingly, data transmission between the two link partners can be stably performed through the optical transceiver unit. | 01-12-2012 |
20120020658 | Optical device - An optical device includes a light source, a controller that supplies control information to the light source and controls an output level of the light source, a monitor that outputs an operation state of the optical output as a monitor output, and an auxiliary controller that records the monitor output and the control information. When the controller stops supplying the control information, the auxiliary controller outputs the control information to the light source in accordance with the relation between the recorded monitor output and the recorded control information. | 01-26-2012 |
20120027400 | FAST OPTICAL RECEIVER FOR UNENCODED DATA - The invention relates to a method and an optical receiver implementing this method suitable for robustly receiving unencoded optical data. The method set the threshold for the receiver using values relating to the high and low values of a binary signal. However, for some data patterns these values may not be accurately determined, such as for extended periods of constant high or low values being transmitted. In this case the method, in one embodiment, assumes that the extinction ratio of the signal is substantially constant and is thereby able to track the threshold for the signal. | 02-02-2012 |
20120027401 | RELATING TO SIGNAL PROCESSING - A method of sampling a radio frequency signal comprises: receiving the radio frequency signal; modulating an optical signal with the radio frequency signal and an oscillator signal to generate a modulated signal; applying a filter to the modulated signal to generate an intermediate frequency signal, the filter having an intermediate pass band and an intermediate roll-off, the intermediate pass band and the intermediate roll-off in combination defining a intermediate frequency band having a first bandwidth; and sampling the intermediate frequency signal at a sampling frequency using a number of optically interleaved analogue-to-digital converters. The oscillator signal and the sampling frequency in combination are arranged such that the intermediate frequency band is defined between consecutive multiples of half of the sampling frequency. | 02-02-2012 |
20120039597 | FIBER OPTIC CROSS CONNECT WITH NON-INTRUSIVE MONITORING AND CIRCUIT TRACER - A non-intrusive monitoring optical connection between two fiber optic lines including a sending fiber optic end that emits light to a first lens that collimates the light to a larger diameter parallel beam of light that enters a tunnel, a second lens that focuses the light from the tunnel to an end of a receiving fiber optic line, a mirror disposed in the tunnel between the first and second lenses, which reflects and diverts part of the parallel beam of light to a diverting tunnel, and a second diverting mirror, disposed at a non-zero angle to a longitudinal axis of the diverting tunnel, which directs the beam from the diverting tunnel into a second diverting tunnel wherein it is collimated by a third lens, disposed in the second diverting tunnel, to an end of a monitoring fiber optic line. | 02-16-2012 |
20120057864 | OPTICAL TRANSMISSION APPARATUS INCLUDING COOLER - An optical transmission apparatus including a cooler includes: a platform having a transmission line patterned to have an angle of 90°; a light source mounted on the platform such that it is connected to the transmission line of the platform and generating light; a cooler positioned under the platform and uniformly maintaining the temperature of the light source; and a transistor outline (TO) stem package allowing the platform to be mounted thereon and having a lead pin connected to the transmission line of the platform through a bonding wire. Temperature control characteristics are provided, high frequency characteristics are improved, and a lens, or the like, can be mounted in a passive alignment manner. | 03-08-2012 |
20120106947 | METHOD FOR MONITORING FIBER LINE STATE, REPEATER, SUBMARINE CABLE SYSTEM - The present invention relates to communications technologies, and discloses a method for monitoring the state of a fiber line, a repeater, and a submarine cable system. The repeater includes a first optical amplifier (OA), a second optical amplifier, a first gating unit, a second gating unit, a first coupler, a second coupler, a third coupler, and a fourth coupler. The first coupler, the fourth coupler, and the first gating unit form an in-to-in loopback path between the input end of the first OA and the input end of the second OA; and the second coupler, the third coupler, and the second gating unit form an out-to-out loopback path between the output end of the first OA and the output end of the second OA. | 05-03-2012 |
20120114327 | METHOD AND APPARATUS FOR ADAPTIVE OPTICAL WIRELESS COMMUNICATION - An optical wireless communication device having a PhotoDiode (PD) for photosensitive detection means, receives a guide message from a specific optical wireless communication device, determines any one optical wireless communication scheme among different optical wireless communication schemes which are included in the guide message and supportable by the specific optical wireless communication device, as a content delivery scheme to be used during content reception, sends a response message including the content delivery scheme, and receives the content that is delivered based on the content delivery scheme. | 05-10-2012 |
20120128347 | Optical switching device, optical add device, and optical drop device - An optical switching device includes plural wavelength selective switches that respectively have a first port and a plurality of second ports; and an optical coupler that has a plurality of third ports on an input-side or an output-side, respectively optically coupled to the first ports of the wavelength selective switches. | 05-24-2012 |
20120141118 | ARBITRATION OF OPTICAL COMMUNICATION BUS - A method, bus controller, and computer program product for arbitrating use of a communication bus for a certain one of a plurality of interconnected nodes that share the bus. The method includes the steps of: presenting a data frame on the transmitter and receiver side of the bus, where the certain node presents at the transmitter side, where the data frame has a embedded clock of a predetermined timing and a header field, synchronizing, by the certain node, with the embedded clock in the data frame at the receiving side of the bus, successively presenting, by the certain node, an idle pattern on the bus determined by a preassigned node ID, emitting light, by the certain node, on the bus at a predetermined timing preassigned to the certain node, and monitoring light emission on the bus that indicates a bus access request from another one of the nodes. | 06-07-2012 |
20120155856 | OPTICAL TRANSMISSION SYSTEM - An optical transmission system includes transmitter | 06-21-2012 |
20120163798 | Controlling Circuit for Analog Measurement Module and Controlling Module thereof - In a controlling circuit, a photo coupler is used for isolating noises, and a general purpose amplifier is used for adjusting a gain, so that a logic tester may test analog signals in cooperation with relays having different specifications and operating voltage level differences in an analog measurement module. A shift register of each controlling circuit of a controlling module also transmits a test data signal to a next stage controlling circuit, so that a logic tester may simultaneously output a plurality of bits to multiple controlling circuits and multiple analog measurement modules by using merely one I/O port. | 06-28-2012 |
20120163799 | Method for Transmitting OAM Message and Processing Error in PON System - A method of transmitting an Operations, Administration and Maintenance (OAM) message and of processing an error in a Passive Optical Network (PON) system is provided. Using an OAM packet format that may be used in common in the PON system, a process of transmitting or receiving an OAM message may be simplified, an efficiency of the process may be increased, and an Optical Network Unit (ONU) may be managed at a high speed. | 06-28-2012 |
20120170926 | MONITORING SYSTEM EMPLOYING CARRIER RECOVERY - The present disclosure provides a system, apparatus and method to provide for monitoring of characteristics of optical signals, as part of wavelength division multiplexed signals for example, transmitted over a network infrastructure. The characteristics of each optical signal may be monitored and maintained at desired values in order to optimize system performance. A system including a coherent detector, as part of a coherent receiver for example, may be employed to associate each transmitted optical signal with a modulated source. Control signals generated by the system can then be provided to elements of the modulated source to control characteristics, such as optical power, optical frequency, and optical phase, for example, of the transmitted optical signal. | 07-05-2012 |
20120177362 | System and Method for Monitoring a Branched Optical Communication System - A system and method for monitoring an optical communication system. The system may include trunk terminals coupled through a trunk path and a branch terminal coupled the trunk path. A monitoring signal routing device within the branch terminal routes a monitoring signal from a branch-drop path to a branch-add path. | 07-12-2012 |
20120183289 | Passive Optical Network Module - A GPON module comprises a housing and a circuit board disposed in the housing. The circuit board further includes ground lines that substantially isolate regions of the circuit board, an electro-optical interface for converting an inbound optical signal to an electrical signal and processing circuitry that is arranged to provide an electrical RF signal to an RF interface. The RF interface comprises a three-pin RF connector exposed from the housing, wherein the RF connector is coupled directly to the circuit board, and two of the three pins are coupled to ground. | 07-19-2012 |
20120189298 | Airfield Lighting Control And Monitoring System Utilizing Fiber Optic Double Loop Self Healing Communications - Control and monitoring of airfield lighting from a control tower and other maintenance/supervisory locations uses double loop self healing fiber optic communications circuits to enhances speed of operation even with large and complex airfield lighting system requirements, and significantly increased reliability and operating lifetime thereof. A plurality of local light control and monitoring groups are used, wherein each group has at least one fiber optic communications concentrator that independently communicates with light controllers within the group and the remote supervisory control and monitoring systems in the control tower and other locations. This allows faster control response of the lamps in each of the airfield light fixtures, and monitoring concentration of operational data within each group. Each of the at least one fiber optic concentrators is optically coupled to double loop self healing fiber optic communications backbone circuits coupled to main and backup computer supervisory control systems for redundancy purposes. | 07-26-2012 |
20120219283 | System And Method For Identifying A Length Of An Installed Fiber Cable - Current approaches for determining and identifying whether a correct length of fiber cable is installed between network elements configured to communicate using specific lengths of cable require manual inspection. Such manual inspection may include the use of markers used for visual inspection of cables matching corresponding network elements. An embodiment of the present invention utilizes identifiers unique to cables of various lengths to determine whether a correct length of cable has been installed. Further, embodiments of the present invention determine whether the unique identifier is received by a network device according to a channel mapping corresponding to a unique physical mapping associated with cables of various lengths. The use of the identifiers and channel mappings enable automatic discovery of lengths of cable that are installed between network devices. | 08-30-2012 |
20120288273 | INTELLIGENT SPLITTER MONITOR - One aspect provides an optical communication system. The system includes an optical combiner, an optical tap, and a controller. The optical combiner is configured to receive a first optical signal at a first port of a plurality of ports. The optical tap is associated with the first port and is configured to divert a portion of the first optical signal. The controller is configured to monitor the diverted portion and to create an ID message including an identification datum associated with the port in the event that the diverted optical signal is detected. | 11-15-2012 |
20120301134 | Network Device - In this application, we have the following examples: (1) Integrating the NID functionality in to the small foot-print of an SFP Module, with one or more of the features below: a) Mounting a NID SoC IC to an existing SFP Printed Circuit Board (PCB); b) Using the power from the SFP module, without requiring separate external power; c) NID SoC having only 2 ports, each with its own MAC and possibly PHY layer; d) NID SoC having an embedded microprocessor, RAM and ROM. Many examples and applications are provided. | 11-29-2012 |
20120301135 | ROUTER HAVING DUAL PROPAGATION PATHS FOR PACKETS - A router comprising an interface module (IM), having an optical path and an electrical path and a speed sensor coupled between an input of the router and an input of the IM. The speed sensor is adapted to receive a packet and detect a speed of the IM connection and in response to the speed of the IM connection being above a threshold value, the speed sensor provides the packet to the optical path of the IM and in response to the relative speed being below the threshold value, the speed sensor provides the packet to the electrical path of the IM. | 11-29-2012 |
20130004154 | DISTANCE MEASUREMENT - Provided in accordance with the invention is a method for measuring the distance of an object in which a transmitted signal (S) with a pulse train having a prescribed pulse repetition frequency (fw) is generated such that the transmitted signal has a frequency comb in the frequency domain, the transmitted signal is directed onto the object, and a reflected signal (R) reflected from the object is received, the phase difference (φ | 01-03-2013 |
20130004155 | Method of Providing End-to End Connection in a Unified Optical and Coaxial Network - A method in a network device for providing end-to-end connection in a unified optical and coax network, comprising receiving at an integrated node device (IND) a frame from an optical line terminal (OLT), wherein the frame comprises a data frame and a logical link identifier (LLID), and placing the data in a one of a plurality of buffers based on the LLID, wherein the one of the plurality of buffers corresponds to a customer premises equipment (CPE) associated with the LLID, wherein the data frame stays intact in a media access control (MAC) layer. | 01-03-2013 |
20130064539 | Transparent Overhead In a Passive Optical Network that Supports Enhanced Features - A Gigabit-capable Passive Optical Network (GPON), including an enhanced Optical Line Termination (OLT) and Optical Network Units (ONUs), provides enhanced features, e.g., features defined in XG-PON. One or more of the ONUs are enhanced ONUs. The enhanced OLT communicates with the ONUs via downstream frames and upstream bursts, each downstream frame and upstream burst being compliant with a GPON framing format. The enhanced OLT transmits downstream frames to the ONUs, the downstream frames including downstream sub-frames with at least one downstream sub-frame being an overhead sub-frame that includes information of the enhanced features. The enhanced OLT receives upstream bursts from the ONUs, the upstream bursts including upstream sub-frames, each upstream sub-frame including an upstream identifier field that indicates to the enhanced OLT whether the upstream sub-frame is an overhead sub-frame. The enhanced OLT and the enhanced ONUs perform network operations to provide the enhanced features specified in the overhead sub-frame. | 03-14-2013 |
20130089320 | PHOTOELECTRIC CONVERSION SYSTEM - A system includes: a plurality of pixels arranged in a matrix; a reference signal generating unit for generating a ramp signal; A/D converters each arranged correspondingly to each of columns to A/D-convert a signal from the pixel; a counter that performs a count operation according to an output of the ramp signal, and supplies the count signal through the count signal line to the A/D converter; and a counter test circuit that is provided independently from the A/D converter, and tests the counter, based on a matching of the expected value of the count signal with the count signal supplied through the count signal line from the counter. This configuration allows the count signal to be checked concurrently with imaging of an object. | 04-11-2013 |
20130170826 | 802.3av Compliant Method Using Small Timescale Bandwidth Assignment for Increased ONU Downstream Energy Efficiency - A method for small scale time increased bandwidth assignment to increase optical network unit ONU downstream energy efficiency includes splitting of downstream scheduling cycles into multiple rounds, using selective ones of the multiple rounds as probing rounds and other than said selective ones of the multiple rounds as fixed rounds, the probing rounds and fixed rounds being cooperatively selected for energy efficiency without limitations in length of the downstream scheduling cycles. | 07-04-2013 |
20130177306 | NOISE-RESILIENT CONSTELLATIONS FOR AN OPTICAL TRANSPORT SYSTEM - Various embodiments of a 16-QAM (quadrature-amplitude-modulation) constellation having one or more subsets of its sixteen constellation points arranged within respective one or more relatively narrow circular bands. Each of the subsets includes constellation points of at least two different amplitudes and may have between about six and about ten constellation points. Each of the circular bands may have a width that is between about 3% and about 20% of the maximum amplitude in the constellation. | 07-11-2013 |
20130195441 | BIDIRECTIONAL OPTICAL TRANSMITTING AND RECEIVING DEVICE - Disclosed is a bidirectional optical transmitting and receiving device which includes a bottom case; a sidewall case; an upper case; a thermoelectric cooler provided on a first portion of the bottom case; a temperature sensor, a light emitting element, and a first lens collecting light emitted from the light emitting element, the temperature sensor, the light emitting element, and the first lens formed over the thermoelectric cooler; a second lens contacting with the exterior via the sidewall case; a filter transmitting light propagated from the first lens to the second lens and reflecting light propagated from the second lens; a third lens coupled with a lower surface of the filter and collecting light reflected from the filter; a light receiving element provided on a second portion of the bottom case and receiving light propagated from the third lens to output an electric signal; a pre-amplifier provided on the second portion and amplifying the electric signal from the light emitting element; and a support formed on the second portion and supporting the filter. | 08-01-2013 |
20130209087 | ASYMMETRIC OTN NETWORK TRAFFIC SUPPORT - A method of network communications includes determining an access identifier (AID) for an egress signal through a network interface of a network element, an Optical Transport Network (OTN) multiplexing structure identifier (MSI) associated with the egress signal through the network interface, another AID associated with a defined ingress signal through the network interface, another OTN MSI associated with the defined ingress signal through the network interface, and associating the egress signal and the defined ingress signal based on the AIDs and OTN MSIs. The first OTN MSI is not equal to the second OTN MSI. | 08-15-2013 |
20130230311 | Systems and methods for compensating for interference in multimode optical fiber - In one embodiment, compensating for interference in optical fiber relates to receiving a signal transmitted over the optical fiber, multiplying the signal by a frequency domain equalization (FDE) filter that compensates for the interference to obtain a filtered signal, computing an error in the filtered signal, estimating a gradient based upon the computed error, and updating the FDE filter using the estimated gradient. | 09-05-2013 |
20130259468 | OPTICAL LINE TERMINAL AND OPTICAL NETWORK UNIT - An optical line terminal which includes an observing unit that observes information of any one or all of an arrival interval of frames, an instantaneous bandwidth under use of a flow, a queue length of a queue temporarily storing the frames, and a traffic type, and a stop determining unit that dynamically determines a sleep time to be a period in which a sleep state where partial functions of the ONU are stopped is maintained, on the basis of the information obtained by the observing unit. The ONU is entered into a sleep state, immediately after communication ends, after a predetermined waiting time passes from when the communication ends, or after a waiting time determined on the basis of the information passes from when the communication ends. | 10-03-2013 |
20130279901 | OPTICAL RECEIVER IMPLEMENTED WITH SEMICONDUCTOR AMPLIFIER - An optical receiver able to distinguish a failure occurred in one of multiplexed signals from a failure in the transmission medium is disclosed. The optical receiver includes an optical de-multiplexer, optical devices, a signal processor, and a controller. Each of the optical devices converts the de-multiplexed signal into an electrical signal. A clock is extracted from one of the electrical signals. The processor decides, based on the electrical signals and the clock, one of the multiplexed signals falls in a failure. | 10-24-2013 |
20140133843 | OPTICAL LINE TERMINAL AND OPTICAL NETWORK UNIT FOR SUPPORTING SLEEP MODE THEREOF - An optical line terminal is provided which includes an upward band allocating unit configured to send an upward bandwidth allocation map to an optical network unit and to determine a sleep mode of the optical network unit according to whether a response message corresponding to the upward bandwidth allocation map is received; and an alarm unit configured to determine an upward bandwidth allocation map transfer operation as a normal operation according to an operation of the sleep mode. | 05-15-2014 |
20140147107 | DROP PORT BASED SHARED RISK LINK GROUP SYSTEMS AND METHODS - Drop port based shared risk link group (SRLG) systems and methods assign SRLG information to drop ports in another level or layer of a network. Thus, drop side SRLG information can be shared between different networks or layers enabling a combination with line side SRLG information within a network to identify and prevent single points of failure across the networks. Typically, SRLG details are assigned to line ports (NNI ports) within a network and this information is not shared with external networks or network layers for routing a connection through the network and the external networks. By assigning SRLG details to a drop port, this information can be relayed between the network and the external networks and considered when planning a route through all of the networks. | 05-29-2014 |
20140153918 | CABLING CONNECTIVITY MONITORING AND VERIFICATION - Connectivity between components in a system is monitored by applying a low voltage at one end of an RF cable, interpreted as a “0” logical state, and determining whether a similar voltage appears at the other end of the cable. If the cable is connected properly, the DC voltage applied at one end will appear at the other end and a proper indication is generated. If the expected voltage level does not appear at the other side, it means that RF connection was not correctly established and an alert is generated. Test systems for testing connectivity may include a first component comprising at least one port, at least one capacitor, and at least one resistor for providing high impedance. A controller provides a first logic state to the at least one port, scans multiple input ports of the system, and records a link corresponding to the applied first logic state. | 06-05-2014 |
20140348499 | INFRARED CONTROL DEVICE - An infrared device configured to remotely control a remote controlled device includes an infrared emitter and a processor. The processor includes a pin connected to the infrared emitter, a generating unit, and a control unit. The generating unit is configured to automatically generate different infrared signals each corresponding to a remote signal generated by a remote control of the remote controlled device. The control unit is configured to alternatively set a voltage at the pin to be logic high and logic level to output the different infrared signals to the infrared emitter. | 11-27-2014 |
20140363153 | Optical Die Test Interface - An integrated circuit optical die test interface and associated testing method are described for using scribe area optical mirror structures ( | 12-11-2014 |
20150318918 | Communication Network Element and Method of Mitigating an Optical Jamming Attack Against an Optical Communication System - A communication network element ( | 11-05-2015 |
20150365177 | Control Systems For Optical Devices And Subassemblies - The present invention describes systems | 12-17-2015 |
20160164597 | AUTOMATED PROVISIONING AND CONTROL OF SHARED OPTICAL SPECTRUM IN SUBMARINE OPTICAL NETWORKS - Systems and methods of sharing optical spectrum between a plurality of users of a submarine optical system includes receiving one or more optical signals from the plurality of users of the submarine optical system, wherein each of the plurality of users are assigned a slice of optical spectrum on the submarine optical system; monitoring each of the one or more optical signals to determine compliance with one or more constraints; and adding the one or more optical signals to the submarine optical system if compliant with the one or more constraints. | 06-09-2016 |