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US20120141137 DISPERSION COMPENSATION DESIGN METHOD AND DISPERSION COMPENSATION DESIGN SYSTEM  
A dispersion compensation design system includes a changing unit setting a changed value for the amount of dispersion compensation for a span connecting nodes constituting an optical network; a...
US20130223851 Dispersion-Compensating System And Dispersion-Compensating Fiber with Improved Figure of Merit  
A dispersion-compensating system and a dispersion-compensating fiber have an improved figure of merit and effective area. The dispersion-compensating system comprises a bulk...
US20090297153 Four quadrant linearizer  
A system includes a laser generator, and a signal distortion generator circuit inline with the laser generator modulation signal and configured to generate distortion vectors in any of four...
US20060078336 Optical dispersion compesnation in the electrical domain in an optical communications system  
Optical dispersion imposed on a communications signal conveyed through an optical communications system is compensated by modulating the communications signal in the electrical domain. A...
US20110236032 Low Nonlinearity Long Haul Optical Transmission System  
A long haul optical fiber transmission system includes a transmitter, a receiver optically coupled to the transmitter with at least two composite optical fiber spans, at least one amplifier...
US20100296818 COST EFFECTIVE OPTICAL TRANSMISSION WITH FAST RAMAN TILT TRANSIENT CONTROL  
A method for cost-effective optical transmission with fast Raman tilt or other transient event control uses a combination of Erbium-doped fiber amplifiers (EDFAs) and Raman fiber amplifiers...
US20140308046 Compensation for Optical Multi-Path Interference  
Systems and methods for optical multi-path interference (MPI) compensation are provided. In an embodiment, a mean MPI signal representing a mean amplitude of the MPI in an input signal is...
US20150104189 COMPENSATION APPARATUS AND METHOD FOR INTER-CHANNEL NONLINEAR DAMAGE  
A compensation apparatus and method for inter-channel nonlinear damage are disclosed where the apparatus includes: an iteration parameter determining unit configured to determine an iteration step...
US20100215377 OPTICAL NETWORK DESIGN APPARATUS AND DISPERSION COMPENSATION DESIGN METHOD  
In an optical network design apparatus, a constraint setter sets a first constraint that one of alternative values given beforehand is selected as the dispersion compensation amount of each node,...
US20060140636 Optical communication system  
An optical communication system has a transmitter generating a phase-modulated optical signal (Sa, Sb, . . . , Sk); a receiver for receiving the phase-modulated optical signal; an optical...
US20050226627 Dispersion compensation in optical communications systems  
Dispersion compensation is applied to an optical signal first by a coarse compensation applied to the signal multiplex on a communications network and then by a fine adjustable compensation...
US20070286606 METHOD OF OPERATING AND OPTIMISING A WDM TRANSMISSION SYSTEM AND COMPUTER PROGRAM PRODUCT  
A method of operating a WDM transmission system (1) with at least one transmitter (4) and at least one receiver (6) connected by means of a dispersive transmission line (8). The proposed method...
US20060045533 Dispersion management in optical networks using a differential phase shift keying modulation format  
Dispersion may be managed in an optical network configured to transmit differential phase shift keying (DPSK) modulated signals by allowing accumulation of dispersion to thousands of ps/nm before...
US20120093516 IN-SERVICE OPTICAL DISPERSION DETERMINING SYSTEM AND METHOD  
A system and method for in-service optical dispersion determination are provided. Optical dispersion is determined by splitting a first optical signal into two components, introducing a time delay...
US20110293287 OPTICAL COMMUNICATION SYSTEM AND OPTICAL COMMUNICATION METHOD  
An optical communication system in which optical transmitter 101 that modulates an electric signal to an optical signal and transmits the optical signal and optical receiver 108 that receives the...
US20090220240 HIGH-SPEED BANDPASS SERIAL DATA LINK  
The present invention relates to a method and system for high-speed bandpass serial data communication. A driver receives at least one data signal and generates a bandpass data signal for...
US20070196111 Optic fiber network communication system with duobinary transceiver  
An optic fiber network communication system is described that allows a duobinary transceiver to be coupled with an optical dispersion compensator receiver. In one example an optical dispersion...
US20140003821 OPTICAL TIME DOMAIN REFLECTOMETER SYSTEMS AND METHODS USING WIDEBAND OPTICAL SIGNALS FOR SUPPRESSING BEAT NOISE  
A correlation optical time domain reflectometer (OTDR) provides a correlation sequence that is continuously transmitted along a fiber for testing the fiber for anomalies. Such continuous...
US20080240727 TUNABLE DISPERSION COMPENSATOR  
The tunable dispersion compensator 10 of the present invention comprises: the Mach-Zehnder interferometers (MZIs) 21 to 25 cascaded on a planar lightwave circuit; and the tunable couplers 31 to 34...
US20070047965 Dynamic amplitude and spectral shaper in fiber laser amplification system  
A method for overcoming the drawback in a fiber CPA laser system that includes a process of generating a large negative TOD by implementing an AODS in a pulse shaper as a dispersive component. The...
US20080056725 METHOD AND SYSTEM FOR OPTICAL TRANSMISSION SIGNAL LEVEL CONFIGURATION  
The invention relates to an optical transmission system comprising transmitter and receiver devices and comprising automatic optical signal level configuration means which provide the same fixed...
US20090317079 DISPERSION DETERMINING APPARATUS AND AUTOMATIC DISPERSION COMPENSATING SYSTEM USING THE SAME  
A dispersion determining apparatus comprises a received waveform monitoring part (1) and a dispersion amount determining part (4). The received waveform monitoring part (1) has a waveform...
US20070047963 Optical transceiver having parallel electronic dispersion compensation channels  
An optical receiver including a demultiplexer, a plurality of detectors and a plurality of electronic dispersion compensation (EDC) circuits. The demultiplexer demultiplexes an optical beam...
US20060067699 Equalizer having tunable optical and electronic dispersion compensation  
A method of and apparatus for optical signal dispersion compensation uses tunable optical (ODC) and electronic (EDC) dispersion compensation. The ODC provides significant first-order dispersion...
US20080025730 Method and apparatus for autonomous adaptation of an optical dispersion compensation ("ODC") module  
Optical transponders incorporating an optical dispersion compensator (“ODC”) to perform an adjustable, frequency dependent correction of an optical signal are described and claimed. The ODC is...
US20070071447 Optical receiving apparatus and dispersion compensating method therein  
An optical receiving apparatus has a route change detector for detecting occurrence of a route change of received signal light, a memory for beforehand storing optimum dispersion compensation...
US20080310855 Optical Transmission Equipment and Method for Controlling Thereof  
The optical transmission equipment includes: a demultiplexer for demultiplexing a transmitted wavelength-multiplexed optical signal to first and second optical signals; a first variable dispersion...
US20100092185 OPTICAL RECEIVER  
An optical receiver for receiving a processing modulated optical signal, the optical receiver includes a variable dispersion compensator for receiving the optical signal and for compensating...
US20070253717 Optical Elements for Waveguide-based Optical Touch Screens  
A data input apparatus having at least one transmit element coupled to a source of light of a predetermined wavelength, at least one light receive element and a detection device to detect...
US20070223931 Dispersion compensation type optical signal receiving apparatus, receiving circuit, receiving method, and receiving program  
To obtain a dispersion compensation type optical signal receiving apparatus constituted in such a manner that an electric signal outputted from a light receiving module can be properly inputted to...
US20100061737 OPTICAL RECEIVER WITH LOW-PASS FILTER AND MLSE UNIT, AND OPTICAL COMMUNICATION SYSTEM IMPLEMENTING THE OPTICAL RECEIVER  
An optical receiver is disclosed in which the error rate for the received data may be effectively reduced even for the non-linear optical transmission system that provides a directly modulate...
US20080080869 Optical Signal Processing Device  
The present invention provides an optical processing device (10). The device comprises an optical guiding arrangement having an input (12) and an output (14) and at least two arms (16, 18) between...
US20070264024 Bi-directional application of a dispersion compensating module in a regional system  
A system for the bidirectional application of a dispersion compensating module in a regional system includes a dispersion compensating module configured to receive a first optical signal traveling...
US20060110165 Optical receiver and method for chromatic dispersion compensation  
An optical receiver (5) for an optical network (2) comprises a dispersion compensation module (7) for adjusting an amount of chromatic dispersion of optical signals transmitted through the optical...
US20060098987 Optical transmission network designing method employing wavelength multiplexed transmission system  
A method of designing a network is proposed that supports the optimal arrangement of wavelength multiplexed variable dispersion compensators to arrange collectively for all wavelengths to be...
US20070189775 Optical network element for compensating dispersion-related propagation effects  
A network element (5) for use in a wavelength division multiplex (WDM) optical transmission system (1). The WDM optical transmission system (1) comprises at least one demultiplexing means (5c)...
US20080310840 Optical Communication Network and Method of Routing in the Network  
A network with nodes interconnected by optical fiber links carrying an optical communication channel having a single optical wavelength. In the network, at least two network nodes operate as...
US20090060523 In-service optical dispersion determining system and method  
A system and method for in-service optical dispersion determination are provided. Optical dispersion is determined by splitting a first optical signal into two components, introducing a time delay...
US20080181616 WAVELENGTH DISPERSION COMPENSATION CONTROL DEVICE AND METHOD THEREOF  
A wavelength dispersion compensation control device includes an error correction circuit for correcting a code error of a signal from an optical transmission line, a variable wavelength dispersion...
US20060251425 Suppression of fiber-induced noise caused by narrow linewidth lasers  
The present invention relates to the suppression of nonlinear fiber effects leading to optical noise, particularly Stimulated Brillouin Scattering (SBS), when narrow linewidth light sources are...
US20090028576 Frequency-Domain Equalization of the Fiber Optic Channel  
Systems and methods for frequency-domain compensation in optical communication systems. In pre-equalization embodiments, the transmitter transforms the data stream into a frequency domain signal...
US20060269292 Reducing crosstalk in optical wavelength converters  
An optical fiber transmission system includes a series of optical fiber transmission spans and one or more all-optical signal processors. The optical fiber transmission spans are connected to form...
US20080056726 Dispersion compensation apparatus and dispersion compensation method  
A dispersion compensation apparatus includes a dispersion compensation unit that conducts dispersion compensation on an optical signal sent from a transmitting device through a transmission path....
US20050123304 Optical transmission system for transmitting optical signals having different transmission rates  
The invention relates to an optical transmission system for transmitting optical signals consisting of N lengths of optical fibre, each comprising an optical fibre and a dispersion compensation...
US20100329693 MULTI DIMENSION HIGH SECURITY COMMUNICATION OVER MULTI MODE FIBER WAVEGUIDE  
A system may comprise a single wavelength laser; a modulator optically coupled to said laser; a length of multi-mode fiber optically coupled to said modulator; and a phase mask optically coupled...
US20090016737 ELECTRONIC DISPERSION COMPENSATION SYSTEMS AND METHODS  
An electronic dispersion compensation module may perform one or more electronic dispersion compensation solutions. The electronic dispersion compensation module may include a solution control...
US20070237526 SYSTEM AND METHOD FOR AUTOMATIC TUNING OF CHROMATIC DISPERSION COMPENSATION FOR A WDM TRANSMISSION SYSTEM USING RAMAN DISTRIBUTED CO-PUMPING  
System and method for dispersion compensation tuning for a WDM optical transmission system. A tunable dispersion compensation module (4) is located at or substantially close to a transmitting end...
US20070297804 HIGH-SPEED DISPERSION COMPENSATION CONTROL APPARATUS  
An optical signal, which is a low-speed signal superimposed on a high-speed phase modulated optical signal by intensity modulation, is used. In an optical receiver apparatus 40, a received signal...
US20070166043 Method and System for Increasing Downstream Bandwidth in an Optical Network  
A method is provided for increasing downstream bandwidth in an optical network that includes providing a downstream terminal comprising a digital output path and an analog output path. The method...
US20050226629 Dispersion compensation method and compensation node apparatus  
A dispersion compensation method comprising the steps of: a) providing a compensation node for each predetermined number of in-line repeaters; b) carrying out dispersion compensation for the...

Matches 1 - 50 out of 94 1 2 >