Optical communications inventions 05/06

20060110157 - Transceiver with interrupt unit: A transceiver comprising a memory and an interrupt unit configured to store interrupt information in the memory and generate an interrupt in response to a parameter exceeding an operating limit is provided. The interrupt unit is configured to provide the interrupt to the host using an output signal to cause...

20060110158 - Methods and apparatus for optical network management using pilot tones: Methods and apparatus for managing an optical network using pilot tones are provided. One method includes generating a list of pilot tones contributed by a selected node to each of its target nodes. Network pilot tone sources are re-configured so that a pilot tone source of any optical path incorporating...

20060110159 - Method for optimizing the optical power in an optical network and an optical network: The invention relates to a method for optimizing the optical power in an optical network that has a plurality of network nodes each having a transmitter and a receiver. The method comprising generating an optical signal at a first network node, receiving the optical signal at a second network node,...

20060110160 - Method and device for the transmission of information by means of an optical data transmission system: The invention relates to a method for the transmission of information by means of an optical data transmission line, the ends of which are embodied as an optoelectronic interface, whereby a light source which can be modulated, such as for example a laser, is provided on the transmission side and...

20060110161 - Method and apparatus for monitoring optical fibers of passive optical network system: Provided are an apparatus and method for monitoring optical fibers of a passive optical network system including an optical line termination located in a central office, a remote node that is a local office, and optical network units on the subscriber side. The apparatus respectively allocates monitoring light wavelengths to...

20060110162 - Optical ring network for extended broadcasting: An optical network includes an access ring, a local ring, one or more add/drop nodes (ADNs), a first gateway and a second gateway. The access ring couples the plurality of gateways and transmits optical signals to and from the gateways, the optical signals comprising multiple wavelengths each wavelength operable to...

20060110163 - Spatial transmit/receive isolation method for optical communication systems: Apparatus, and a corresponding method, for spatially isolating a transmit beam and a receive beam, which, in satellite communication systems, are inherently separated by a look ahead angle. A receive beam separation mirror is positioned in the receive beam path but out of the transmit beam path, and the receive...

20060110164 - Multiple pcba transceiver: A transceiver including a transmitter, a receiver, a first printed circuit board assembly, and a second printed circuit board assembly. The transmitter is configured to convert electrical signals to fiber optic signals. The receiver is configured to convert fiber optic signals to electrical signals. The first printed circuit board assembly...

20060110165 - 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 network (2) and is characterized in that a nonlinear optical element (13) for spectral broadening of a dispersion probe signal transmitted...

20060110167 - Clock signal generation apparatus using asymmetrical distortion of nrz signal and optical transmission and reception system employing the same: Provided are a clock component generating apparatus using an asymmetrical distortion of NRZ (non-return to zero) signal and an optical transmission and reception system employing it. The clock component generation apparatus can make an NRZ optical signal have large clock component by asymmetrically distorting the rising and the falling waveform...

20060110166 - Detecting and locating pulses using a bragg cell: Detecting a pulse of a signal includes receiving the signal and a light beam. The signal drives a spatial light modulator to modulate the light beam, where the complex amplitude of the modulated light beam is proportional to the signal current. The modulated light beam passes through an optical system...

20060110168 - Return-to-zero alternative-mark-inversion optical transmitter and method for generating return-to-zero alternative-mark-inversion optical signal using the same: An optical transmitter for generating return-to-zero alternative-mark-inversion (RZ-AMI) optical signals and a method for generating the optical signals are provided. The optical transmitter includes a light source radiating at its output an intensity-modulated light beam based upon intensity of a first data, a precoder for precoding a second data having...

20060110169 - Laser power control with automatic compensation: A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a default or target value from memory may be utilized to bias or otherwise control operation of an optic signal generator or driver. During operation, pre-stored values...

20060110170 - Optical receiver having transient compensation: An optical receiver having compensation for signal level transients. The receiver includes an OE converter, a transient threshold compensator, a threshold combiner and a CDR system. The OE converter receives the incoming optical signal and provides a modulated electrical signal having a high speed response for tracking the modulation on...

20060104636 - Optical network for bi-directional wireless communication: A bi-directional metro-access optical network includes a central office for generating beams of different wavelength bands and a plurality of wavelength locked downward optical signals and for detecting wavelength locked upward optical signals; a plurality of nodes for detecting the downward optical signals of different wavelengths and for generating the...

20060104637 - Optical network termination apparatus with shared components and passive optical network system comprising same: A transmission system for a passive optical network comprises a shared optical transmission apparatus, a shared electrical interface apparatus and a plurality of transmission convergence termination units. The shared optical transmission apparatus is configured for being coupled to an optical line termination unit via an optical fiber. The shared electrical...

20060104638 - Communication recovering system for wavelength division multiplexed passive optical network: A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON). The communication recovering system can recover fault of optical fibers between the central office and the remote nodes without additional optical fibers by grouping two remote nodes and employing an AWG having periodic transmission characteristics, and...

20060104639 - D(wdm) communications network employing periodic spectral multiplex processing: A WDM network (R) comprises an optical fiber (F) connected to a hub (H) via an input of a demultiplexer (DX) having N outputs to communications stations (Si-Sn) able to deliver and/or receive spectral multiplexes of modulated optical signals with different wavelengths, via coupling means (CP, CP′, MXB). The communications...

20060104640 - Wavelength division multiplexing apparatus: A transponder in a wavelength division multiplexing apparatus detects a wavelength of a leak light (received light) having one of plural wavelengths multiplexed or divided by a WDM unit, the leak light having been received from the WDM unit when the transponder is connected to the WDM unit; determines a...

20060104641 - Through channel loss prevention at a wdm node: At a WDM add/drop node of an optical fiber, an add/drop multiplexer system with opto-electric components in the through channel path has an optical switch connected in parallel with an add/drop multiplexer. Upon a power loss to the add/drop multiplexer, the optical switch bypasses the add/drop multiplexer so that WDM...

20060104642 - Directional antenna: A directional antenna is provided that transmits an information signal to a light source having a beam directing reflective surface. In an aspect, the information signal is impressed across a light filament and the reflective surface directs the electromagnetic radio waves in a predetermined direction. The radiated information signal may...

20060104643 - Optical network for bi-directional wireless communication: An optical network for bi-directional communication includes: a base station for generating downlink optical signals and detecting uplink optical signals; and a remote antenna unit for transmitting the downlink optical signals and generating the uplink optical signals to the base station; wherein the remote antenna includes: an optical detector for...

20060104644 - Mobile communication terminal, apparatus for providing wire communications to the same and method thereof: A mobile communication terminal, apparatus for providing a wire communication to the same and method thereof are disclosed, by which a wire communication can be further provided using a short range wireless communication system to be prepared for the resource shortage of a mobile communication service or a further complicated...

20060104645 - Method and apparatus for transmitting high-frequency signals in optical communication system: A method for transmitting high-frequency signals in an optical communication system includes combining an optical signal, the first optical local component from a local light source and the second optical local component from the local light source having a predetermined frequency differential from the first optical local component, selecting the...

20060104646 - Optoelectronic transmitting arrangement and optoelectronic receiving arrangement for parallel optical interconnects: The invention relates to an optoelectronic transmission arrangement for optical parallel connections. The transmission arrangement has: a first number (N) of electrical data channels that in each case transmit electrical input data; a second number (N+m) of optical transmitters, a transmitter in each case being able to convert the electrical...

20060104647 - Receiver circuit for a receiving element: A receiver circuit is disclosed which enables a reception signal fed into the receiver circuit by a reception element to be processed—e.g. amplified—with little to no errors The receiver circuit has a cascode circuit on an input side, which cascode circuit generates an output signal from the reception signal of...

20060098980 - Apparatus and method for monitoring optical signal-to-noise ratio: An apparatus and a method for monitoring optical signal-to-noise ratio are provided. It can be applied in dense wavelength-division multiplexed networks to monitor the transmission quality of each optical channel. The apparatus comprises an optical circulator, a tunable optical filter, a dithering signal, a dithered reflector, and two photodiodes. It...

20060098981 - Optical transmitting apparatus, method of increasing the number of paths of the apparatus, and optical switch module for increasing the number of paths of the apparatus: An optical transmitting apparatus is configured such that K pieces of output ports of optical path switching units whose input port is connected to k-th input transmission path are connected to first to K-th output transmission paths except for the k-th output transmission path and to the k-th input port...

20060098983 - Optical add/drop multiplexer: The optical add/drop multiplexer of the present invention includes an optical splitting means dividing a wavelength division multiplexed optical signal into a pass path and a drop path; a first wavelength selection switching means receiving the dropped optical signal, demultiplexing the received optical signal, and switching a specific wavelength to...

20060098982 - System and apparatus for dropping and adding optical data streams in an optical communication network: A system and apparatus for dropping and adding optical data streams in an optical communication network uses a photonic switching fabric for dropping but not adding optical data streams, and uses a combiner external to this photonic switching fabric for combining passed optical data streams from the photonic switching fabric...

20060098984 - Optical signal communication apparatus and optical signal communication system employing the optical signal communication apparatus: An optical signal communication apparatus includes a light transceiving section, a digital signal control section and a flexible wiring board. The light transceiving section performs at least one of transmission and reception of optical signals. The digital signal control section is disposed in a casing body and processes digital electronic...

20060098985 - Optical signal transmission device and signal transmission system using such a device: An optical signal transmission device including an optical signal receiving section, an optical signal transmitting section, a support member, and a digital signal control section. The optical signal receiving section receives an optical signal by a light-receiving element mounted on a board, converts the optical signal to a digital electric...

20060098986 - Optical receiver for reducing optical beat interference and optical network including the optical receiver: An optical receiver for use in an Optical Network (ON) such as a WPON based on an SCMA scheme. The optical receiver apparatus for use in a Central Office contained in an ON includes: an optical power divider for dividing an input optical signal into first and second optical signals;...

20060098988 - Dispersion compensating device and optical transmission system: A dispersion compensating device having a VIPA plate which is an optical component, a lens, and a mirror includes high reflectivity side monitor means for monitoring the light that is input into the VIPA plate and emitted from the first reflecting surface. By this, the passage characteristics of the dispersion...

20060098987 - 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 wavelength multiplexed. The method includes the steps of inputting setting conditions; obtaining arrangement patterns for installing wavelength multiplexed variable dispersion compensators in the...

20060098989 - System for minimizing or compensating pmd-induced distortion in optical transmission systems and transmission fibres in particular: What is described here is a system for compensating distortions induced by polarisation modulation dispersion (PMD) in optical transmission systems and in transmission fibres in particular, comprising a means for measuring PMD-induced distortions, an emulator unit for adjustable PMD levels, and a controller which the output signal of said measuring...

20060098990 - Maximising power in optical communication networks: The relative launch power of signals at an add/drop node transponder is controlled to maximize available power. Known values of signal bandwidth and likely noise in the signal path, for example, derived from the system manager, are used to control the launch power into the optical amplifier, in order to...

20060098991 - Optical communications apparatus: An Optical communications apparatus, comprising: (a) an optical integrated device comprising an input, one or more integrated optical component(s) and an output, arranged such that light received by the input is propagated by the optical component(s) and exits the device as an output light beam; (b) a light beam diverter...

20060093353 - Optical access node: Optical access nodes (1) comprising optical line terminations (31,32) and comprising optical components (41,42) coupled to the optical line terminations (31,32) are provided with switching means (50-52) for coupling a redundant optical line termination (60) to the optical components (41,42). This redundant optical line termination (60) forms a substitute for...

20060093354 - Resilient switch: A switch for the switching of communications system signals, with m input ports and n output ports, comprising two or more parallel switch matrices, each of size m×n, combined so that each switch matrix contributes to the available output power at each output port. The failure of one of the...

20060093355 - Apparatus and method for label transmission in optical packet data switching network: An apparatus and method for effectively transmitting a packet data and a control data of path information about the packet data in an optical packet data switching network. The method includes grouping a plurality of wavelengths into at least two wavelength bandwidths, each wavelength bandwidth being composed of neighboring wavelengths,...

20060093356 - Optical network that detects and removes rogue onts: A point-to-multipoint communications network includes an optical line terminal (OLT) and a number of optical network terminals (ONTS) which each detect and remove rogue ONTs from the network. The OLT monitors transmission errors to detect the presence of a rogue ONT, and can determine the identity of the rogue. Each...

20060093357 - Method and apparatus for suppressing optical surge in optical burst switching network: Apparatuses and methods are provided which suppress a surge component occurring at an optical amplifier on an optical path through which an optical burst signal is transmitted. An optical amplifier may experience a surge due to the power variation of the optical burst signal that is fed to the optical...

20060093358 - Optical packet communication system using labeling of wavelength-offset polarization-division multiplexing: Disclosed is an optical packet communication system using a wavelength-offset polarization-division multiplexing labeling. An optical signal transmitter which is provided at an ingress node positioned at a sending end in an optical packet switching network, generates and combines packet data and a label, and transmits the combined packet data and...

20060093359 - Loop-back wavelength division multiplexing passive optical network: Disclosed herein is an apparatus and method for managing faults of a loop-back Wavelength Division Multiplexing Passive Optical Network (WDM-PON). The apparatus includes a control light source as well as a plurality of light sources in a central office, a loop-back means for transmitting control light to the central office...

20060093360 - Loop-back wavelength division multiplexing passive optical network: Disclosed herein is a loop-back Wavelength Division Multiplexing Passive Optical network (WDM-PON). The loop-back WDM-PON includes a coupler, a terminal receiver, and a reflective semiconductor amplifier. The coupler branches a downstream signal, which is transmitted from a central office, into first and second downstream signals. The terminal receiver receives and...

20060093361 - Optical bus system: Systems are provided having, for example, at least first and second processing units, an optical bus system coupled to the at least first and second processing units, and an optical bus controller coupled to the optical bus system. The optical bus system includes a plurality of optical switches and each...

20060093362 - Deployment of electro-optic amplitude varying elements (aves) and electro-optic multi-functional elements (mfes) in photonic integrated circuits (pics): Electro-optic amplitude varying elements (AVEs) or electro-optic multi-function elements (MFEs) are integrated into signal channels of photonic integrated circuits (PICs) or at the output of such PICs to provide for various optical controlling and monitoring functions. In one case, such PIC signal channels may minimally include a laser source and...

20060093363 - Adjustable boot speed in an optical transceiver: An operational optical transceiver configured to dynamically adjust the boot speed of the optical transceiver boot process. The optical transceiver includes a persistent memory, a system memory, and a controller configured to load information from the persistent memory to the system memory. The controller initiates the boot process at a...

20060093370 - Configurable optical transceiver feature specific cost transaction: An environment that facilitates the purchasing and updating of specific operational features in an optical transceiver (or optical transmitter or optical receiver). The environment includes a host computing system (hereinafter referred to as the “host”), a network, a remote computing site, and an optical transceiver having a system memory and...

20060093368 - Dynamically adaptive optical transceiver: Adaptive transmission of optical signals. A dynamically adaptive optical receiver can include a receive optical subassembly (ROSA). The ROSA can include an opto-electronic transducer configured to receive an incoming optical signal from an incoming optical transmission link, circuitry for evaluating one or more properties related to the incoming optical signal,...

20060093367 - Inter-transceiver module communication for firmware upgrade: An operational optical transceiver configured to update operational firmware using an optical link of the transceiver. The optical transceiver includes at least one processor and a system memory capable of receiving firmware. The optical transceiver receives an optical signal over the optical link containing the update firmware. The optical transceiver...

20060093369 - Photonic integrated circuit (pic) transceivers for an optical line terminal (olt) and an optical network unit (onu) in passive optical networks (pons): A photonic integrated circuit (PIC) for a PON transceiver comprises a single monolithic chip having a modulated transmitter laser diode of a first wavelength, λ1, for generating a first communication signal outgoing from the chip via an input/output port and a receiving photodetector for receiving a second communication signal of...

20060093366 - Reliable transceiver microcode update mechanism: A method for dynamically updating an optical transceiver (or optical transmitter or optical receiver) that has at least one processor, a persistent memory, and a microcode loader mechanism. The persistent memory includes microcode comprising instructions that, when executed by the at least one processor, control at least one component of...

20060093365 - Selectable host-transceiver interface protocol: An optical transceiver, including a memory and a processor, which is capable of supporting different host interface protocols for communication between the optical transceiver and a host computing system. Each of the host interface protocols may be implemented by selecting microcode that corresponds to a particular host interface protocol and...

20060093371 - Transaction for transceiver firmware download: An environment that facilitates the purchasing and updating of specific operational features in an optical transceiver (or optical transmitter or optical receiver). The environment includes a host computing system (hereinafter referred to as the “host”), a network, a remote computing site, and an optical transceiver having a system memory and...

20060093372 - Transceiver based loop back initiation: An operational optical transceiver configured to initiate operation in loop back mode. The optical transceiver includes transmit and receive signal paths, a memory capable of having microcode written to it, and a configurable switch array that is used to connect and disconnect the two signal paths as appropriate for a...

20060093364 - Volatile memory persistence during warm reboot in an optical transceiver: An operational optical transceiver configured to preserve a portion of volatile memory during a warm reboot process. The optical transceiver includes a persistent memory, a processor, and a system memory. The system memory includes a preserved memory space. The optical transceiver loads microcode from the persistent memory to the system...

20060093373 - Multi-transceiver module control with single microcontroller: An optical transmit and receive circuit that includes a single control module that controls the transmit and receive operational behaviors in multiple transmit and receive data paths of the optical transmit and receive circuit. By having a single control module control operational behaviors of multiple electro-optic transducer drivers, and multiple...

20060093374 - Fiber optic communication signal link apparatus: A fiber optic communication signal link apparatus for performing fiber optic link communication including a transmitter apparatus and a receiver apparatus coupled by a fiber optic cable. The transmitter is capable of detecting and modulating data that includes at least one of position, light and audio data. An analog voltage...

20060093375 - Clock extracting method and apparatus thereof: A clock extracting apparatus of the present invention arranges bit intervals of a signal light train incident on a signal light processing section at periodically uneven, makes bit intervals between a predetermined signal light and signal lights adjacent to the predetermined signal light to be longer than a switching time...

20060093376 - System and method for providing two-way communication of quantum signals, timing signals, and public data: A system and method for providing two-way communication of quantum signals, timing signals, and public data is provided. Generally, the system contains a first public data transceiver capable of transmitting and receiving public data in accordance with a predefined timing sequence, a first optical modulator/demodulator capable of transmitting and receiving...

20060093377 - Optical phase modulation: An optical modulator provides for precoding of a high data rate phase modulated optical signal. According to one embodiment, the modulator includes a first phase modulator and a second phase modulator. The first phase modulator modulates an optical carrier signal according to a first data signal to generate a modulated...

20060093378 - Optical transmitter: The present invention provides an optical transmitter comprising one control unit and a plurality of optical sources. Control signals are multiplexed and de-multiplexed as appropriate to enable control of all optical sources by the control unit....

20060093379 - Systems and methods for providing diagnostic information using edc transceivers: An optical transceiver is disclosed. The transceiver includes a receiver having adaptive electronic dispersion compensation (EDC) circuitry on at least one optical channel. The adaptive electronic dispersion compensation circuitry provides diagnostics information to a host system. The transceiver can be an XFP, X2, XENPAK, SFP, SFF, GBIC or other type...