Matches 1 - 50 out of 85 1 2 >


Match Document Document Title
US20130202287 CORRELATION SYSTEMS AND METHODS WITH ERROR COMPENSATION  
A correlation system, such as a correlation optical time domain reflectometer (OTDR) system, transmits a correlation sequence, such as an M-sequence, and measures the returns of the correlation...
US20130071108 SCHEME FOR REMOTE CONTROL OF THE WAVELENGTH OF A TUNABLE TRANSMITTER IN A SMART TRANSCEIVER  
A scheme is described for remote control of the wavelength of a tunable transmitter in a smart SFP transceiver, a smart SFP+ transceiver, a smart XFP transceiver, a smart duplex transceiver, a...
US20140348500 OPTICAL RECEIVER AND SLICE LEVEL CONTROL METHOD  
An optical receiver includes a first discriminator in which an optimal point of a slice level is set and that compares a received signal to the slice level and discriminately outputs the received...
US20130089323 Optimal Combined 2R/3R Regenerators Placement Method for Line Network Topologies in Optical WDM Networks  
A method for optimal combined 2R/3R regenerators placement for optical transmission includes determining an optimal placement of multiple 2R and 3R regenerators that minimizes bit error rate BER...
US20140369681 Method And Apparatus For Alien Device Identification In Passive Optical Networks  
A manner of detecting the presence of alien devices, for example ONUs, that are transmitting upstream in an optical access network such as a PON. An alien detection device, for example a properly...
US20130336649 ADAPTIVE CONSTELLATIONS AND DECISION REGIONS FOR AN OPTICAL TRANSPORT SYSTEM  
An optical transport system in which (i) an optical transmitter is configured to adaptively change an operative constellation to use a constellation that provides optimal performance...
US20150139639 SCHEME OF REMOTE CONTROL OF THE SLICING LEVEL OF A RECEIVER IN A SMART TRANSCEIVER  
A scheme is described of remote control of the slicing level of a receiver in a smart SFP (or SFP+, or XFP) duplex (or BiDi, or SWBiDi) transceiver in a communication system using an operating...
US20130039652 SCHEME OF REMOTE CONTROL OF THE SLICING LEVEL OF A RECEIVER IN A SMART TRANSCEIVER  
A scheme is described of remote control of the slicing level of a receiver in a smart SFP (or SFP+, or XFP) duplex (or BiDi, or SWBiDi) transceiver in a communication system using an operating...
US20120155862 OPTICAL PACKET SWITCHING SYSTEM  
An optical packet switching system includes: an optical packet switching device configured to route and output an input optical packet signal; an optical amplifier device provided in a stage...
US20100021158 OPTICAL COMMUNICATIONS SYSTEM WITHOUT USING A SPECIAL-PURPOSE EVALUATION SIGNAL  
A subscriber terminating unit includes an error count counting portion counting an error count in a predetermined time range based on the number of corrections by an error correction function and...
US20110255865 METHOD AND SYSTEM FOR ASCERTAINING THE MAPPING BETWEEN VIRTUAL LANES AND PHYSICAL LANES IN A MULTI-LANE TRANSCEIVER  
For an apparatus which communicates data of a number of virtual lanes over a number of physical lanes, where the number of virtual lanes is different than the number of physical lanes and where a...
US20120269506 METHOD AND SYSTEM FOR AN ADAPTIVE CHANNEL GRID OF AN OPTICAL NETWORK  
In accordance with an embodiment of the present disclosure a method for adaptively spacing channels of an optical network comprises determining a first desired power level of a first channel of an...
US20100239245 Polarization Mode Emulators and Polarization Mode Dispersion Compensators Based on Optical Polarization Rotators with Discrete Polarization States  
Systems, devices and techniques for generating and analyzing states of polarization in light using multiple adjustable polarization rotators having different discrete polarization rotation states...
US20050175340 Optical transmission network management process  
The routes for transmitting optical signals between the nodes (N1-N6) of a transparent network are selected according to the estimated error rate (ERe) values presented by the signals received...
US20090123147 Test Instrument For Testing Multi-Wavelength Optical Networks Using Two Or More Tunable Lasers  
The present invention relates to test equipment (e.g. TBERD 8000) with two or more Tunable Lasers (TL) for testing the complete spectrum of a DWDM system. Diagnostic software is used to stepwise...
US20130170829 Optical Coherent Receiver Optimization  
Coherent optical receiver performance is optimized and made adaptable to changing optical channel conditions by providing feedback loops to adjust receiver parameters based on measured receiver...
US20070014572 Bit error rate contour-based optimum decision threshold and sampling phase selection  
A method and system for a bit error rate (BER) contour-based optimum decision threshold and sampling phase selection in optical communication systems is disclosed. According to one aspect of the...
US20120275783 OPTICAL PACKET SWITCHING SYSTEM  
An optical packet switching apparatus includes an optical packet switching apparatus, an optical transmitting apparatus, and an optical packet receiving apparatus. The optical packet transmitting...
US20080267622 EFFICIENT AND SIMPLE BIT ERROR RATE CALCULATION ON OPTICAL TRANSPORT LAYER  
Transport network interfaces operate to transport for Optical Transport Unit frames over an Optical Transport Network. Besides FEC bits for the Optical Transport Unit frames, the transmitting...
US20140023362 POLARIZATION DEPENDENT LOSS COMPENSATION  
An apparatus including a polarization controller is described. The polarizer controller is communicatively coupled via a feedback loop to an evaluation module located near an optical receiver. The...
US20130308937 WDM PON WITH NON TUNABLE LEGACY ONUS  
In one embodiment, a media access controller includes first and second optical line terminals with a receiver for adjacent first and second wavelength ranges, respectively, and an optical network...
US20120294606 SYSTEM AND METHOD FOR ENHANCEMENT OF ETHERNET LINK LOSS FORWARDING  
A system and method provide enhanced link loss forwarding in an Ethernet system to determine link degradation and to selectively block and re-establish transport between a near end device and far...
US20120230678 OVERHEAD ADJUSTMENT SCHEME FOR PASSIVE OPTICAL NETWORKS  
Embodiments of the present invention relate system and method for handling large dynamical signals in a passive optical network system and in particular for determining scheduling of bursts from a...
US20070003280 Method and system for determining receiver power for required bit error rate  
A method and system for determining a receiver power for a required bit error rate (BER) in an optical communication systems is disclosed. A signal is transmitted using an initial transmitter...
US20050226613 Net chromatic dispersion measurement and compensation method and system for optical networks  
Residual chromatic dispersion in an optical transmission system is measured and compensated by utilizing the bit error rate for the system. A predetermined amount of chromatic dispersion is...
US20110188852 METHOD AND APPARATUS FOR FAST OPTICAL SIGNAL IMPAIRMENT EVALUATION  
Having a fast method to perform impairment evaluation is useful for many networks. A method or corresponding apparatus according to an example embodiment of the present invention maintains a...
US20110286740 DQPSK/DPSK OPTICAL RECEIVER WITH TUNABLE OPTICAL FILTERS  
An optical receiver includes a first interferometer having a plurality of arms. The optical receiver further includes first tunable optical filters connected in series with the arms of the first...
US20090060497 Feedback Controlled Locking of Optical Channel Signals in Optical Receivers in Wavelength Division Multiplexed (WDM) Communication Systems  
Techniques, apparatus and systems for optical communications that use feedback controlled locking of optical channel signals in optical receivers in WDM communication systems, including ultra...
US20080232796 OPTICAL SIGNAL MONITORING SYSTEM AND OPTICAL SIGNAL MONITORING METHOD  
An optical signal monitoring system includes a bit rate information collecting unit and a monitoring unit. The bit rate information collecting unit gets bit rate information indicating a bit rate...
US20090269055 Channel balancing algorithm  
An algorithm is disclosed for performing channel balancing on channels between optical network elements within an optic-fiber communications system. The algorithm groups at least a portion of the...
US20080008469 Communication apparatus, communication line diagnosis method, program and recording medium  
In a communication apparatus and the like, the line diagnosis using a test signal is conducted with higher precision. A test signal transmitter generates a test signal for a line diagnosis to feed...
US20090196602 Adjustable Bit Rate Optical Transmission Using Programmable Signal Modulation  
Techniques, apparatus and systems to provide adjustable bit rate optical transmission using programmable signal modulation in optical communication systems.
US20100046943 SIMULATION OF OPTICAL CHARACTERISTICS OF AN OPTICAL FIBER  
An optical communication apparatus that includes multiple optically communicative components positioned optically in series. Some of the optically communicative components may be optical fiber...
US20050152693 Method for per-channnel power control in a DWDM network by means of an algorithm for adjusting the power of a dummy signal and the input power of an optical amplifier via channel-average Q-factor measurement  
A description is given of a method for per-channel power control in a DWDM transmission network comprising at least one optical amplifier that can be gain-controlled, by injection of a dummy...
US20120141116 METHOD AND DEVICE FOR RECOVERING OTUK FRAME, AND SYSTEM FOR TRANSPORTING OTUK FRAME  
A method for recovering an OTUk frame includes: receiving an optical signal sent by using a method of multi-lane distribution from the OTUk frame to an interface of an optical module; converting...
US20140355979 System and Method for an Optical Coupler  
In one embodiment, an optical directional coupler includes an input terminal configured to receive an input optical signal and a first coupler optically coupled to the input terminal, where the...
US20070140689 METHOD AND SYSTEM FOR PASSIVE OPTICAL NETWORK DIAGNOSTICS  
A method and system for identifying faults in a passive optical network (PON), The method comprises acquiring at an optical network terminal of the PON at least one parameter indicative of at...
US20130156420 ADAPTIVE FORWARD ERROR CORRECTION IN PASSIVE OPTICAL NETWORKS  
A method for an adaptive forward error correction (FEC) in a passive optical network. The method comprises selecting an initial downstream FEC code to be applied on downstream data transmitted...
US20070031147 Processes and devices for the determination of a pmd-induced outage probability of an optical transmission system  
The present invention proposes a method whereby during a specified/specifiable observation period (Ttotal), the polarization states of an optical transmission system and/or the optical signals...
US20120224849 OPTICAL INTERCONNECT USING OPTICAL TRANSMITTER PRE-DISTORTION  
In one embodiment, the invention provides an optical interconnect comprising a transmitter for generating and transmitting an optical signal, a receiver for receiving the optical signal from the...
US20140334815 SYSTEM AND METHOD FOR SELECTING AN OPTICAL PATH IN AN OPTICAL NETWORK  
The invention proposes a system and method for selecting an optimal optical path through which to transmit an optical signal, the optimal optical path is one of a plurality of optical paths in a...
US20090304380 Quality of service in an optical network  
A method and apparatus for implementing optical network quality using bit error rate and chromatic dispersion. According to one embodiment of the invention, a method includes the provision of...
US20120008940 SYSTEM AND METHOD FOR CHANNEL-ADAPTIVE ERROR-RESILIENT TRANSMISSION TO MULTIPLE TRANSCEIVERS  
In a passive optical network, a downstream transmission rate from an OLT to multiple ONTs can be optimized by matching a transmission scheme for frames addressed to a channel to the downstream...
US20120002961 SYSTEM AND METHOD FOR CHANNEL-ADAPTIVE ERROR-RESILIENT BURST MODE TRANSMISSION  
In a passive optical network, an upstream transmission rate from an ONT to an OLT can be optimized by matching a transmission scheme for a channel to the upstream transmission characteristics of...
US20120251099 Multiplexer Lane Alignment for High-Speed Data Systems  
Patterns detected by a low-speed receiver at the output of a high-speed multiplexer are used to determine when multiplexer input lanes are deskewed.
US20130129348 SUBCARRIER POWER BALANCE CONTROL  
A method of controlling a multiple sub-carrier optical channel of an optical communications system. The multiple sub-carrier optical channel includes at least two sub-carriers modulated with...
US20110286739 OPTICAL RECEIVER MODULE  
An optical receiver module includes an optical receiver that receives and converts a plurality of optical signals depending on different polarized states into a plurality of electric signals, a...
US20140186029 METHODS AND DEVICES FOR ACTIVE OPTICAL CABLE CALIBRATION  
Methods and devices for laser driver calibration are disclosed. The methods and devices disclose determining first and second bit error rates for use in calibrating the laser driver. The methods...
US20090028555 OPTICAL FILTER  
An apparatus and method are provided for filtering an optical signal by wavelength. An initially polarised signal is passed through a DGD element effective to alter the polarisation state of the...
US20150180586 OPTICAL RECEIVING DEVICE  
An optical receiving device includes: an adaptive equalizer that includes a position estimation unit configured to estimate, based on a first signal component and a second signal component of a...

Matches 1 - 50 out of 85 1 2 >