Optical communications inventions 10/06

20060239682 - Time and wavelength division multiplexed passive optical network: A time and wavelength division multiplexed passive optical network where a central office has a downstream transmitter and an upstream receiver. The downstream transmitter multiplexes and transmits downstream optical signals in a time region. The upstream receiver de-multiplexes, in a wavelength region, an upstream optical signal. An optical network unit...

20060239683 - Wavelength-division-multiplexed passive optical network: Disclosed is a wavelength-division-multiplexed (WDM) passive optical network which comprises an optical network unit (ONU) for receiving and transmitting an optical communication service; a remote node having an amplifier for amplifying wavelength of light as being transmitted from the optical network unit; and a central office for receiving the amplified...

20060239684 - Optical add/drop device, optical add/drop system, and optical signal add/drop method: An optical add/drop device, an optical add/drop system, and method thereof is provided herein. The optical add/drop system may include, a first variable coupler which splits input light to through light and dropped light, a wavelength blocker which attenuates an intensity of each channel of the through light, a second...

20060239686 - Electromagnetic device with frequency downconverter: An optical antenna assembly including multiple optical antenna elements, each of the optical antenna elements are arranged in a regular pattern and carried by a supporting body. The regular pattern of the plurality of optical antenna elements is nonuniform. Certain ones of the optical antenna elements are configured to respond...

20060239685 - Method of transmitting a signal in a distributed bts system: The present invention relates to a method of transmitting a signal in a distributed Base Transceiver Station (BTS) system that comprises a main unit and RF remote units. The present invention uses an optical coupler and RF couplers to transmit signals through multiple RF units, and thus extends the range...

20060239687 - Optical fiber communication link: A communication includes an analog input configured to receive an analog signal. An analog to digital converter configured to provides a digital signal output based upon the analog input. A modulator is configured to modulate a laser based upon the digital signal thereby generating a modulated optical signal. An optical...

20060239688 - Multi wavelength electromagnetic device: An optical antenna assembly including multiple optical antenna elements, each of the optical antenna elements are arranged in a regular pattern and carried by a supporting body. The regular pattern of the plurality of optical antenna elements is nonuniform. Certain ones of the optical antenna elements are configured to respond...

20060239689 - Method and apparatus for illumination and communication: The present invention provides a method and apparatus of using light-emitting elements for illumination as well as communication of data, wherein potential flicker due to sub-fusion frequency data correlations can be reduced compared to prior art techniques, while reducing redundancy in the data transmission. The intensity of the illumination from...

20060239690 - Changing transceiver module device addresses using a single host interface: A method for changing the host communication interface address for a number of individual optical transceivers sharing a single host communication interface. An optical transceiver host computing system is communicatively coupled to the transceivers using the single host communication interface. The host computing system implements the host interface address change...

20060239691 - Optical transceiver with connector: An optical transceiver includes a housing with an optical connector in mechanical contact therewith. The optical connector at the optical transceiver allows for an optical connector at an end of a fiber optic drop cable to be connected directly to the optical transceiver. This transceiver housing/optical connector arrangement replaces labor...

20060239692 - System and method for auto-configuring a telecommunication device with an embedded controller: The present invention is a telecommunication device with an auto-configurable capability that supports both serial and parallel data interfaces. The telecommunication device can transfer configuration data through a serial interface such as I2C interface and a parallel interface such as UPI. The telecommunication device can auto-configure through the I2C interface...

20060239693 - Communication apparatus: A communication apparatus according to the present invention comprises a transmitter for generating and transmitting a data signal where data is superposed as time length of a pulse interval, and a receiver for receiving the data signal. The transmitter and the receiver are connected through a single communication line. The...

20060239694 - Data format for high bit rate wdm transmission: The invention includes a method for optically encoding data for transmission over a wavelength division multiplexed optical communications system comprising the steps of: generating a periodic series of optical pulses defining a series of time slots, wherein one pulse appears in each time slot; filtering the pulses to produce carrier...

20060239695 - Frequency tuning of photonic oscillator using amplifier bias voltage: In one implementation of the present invention, a method is provided for frequency tuning of a photonic oscillator. The method includes supplying an optical signal, for example laser light, which is modulated, delayed, and then converted to an electrical signal. The electrical signal is amplified, and used in modulating the...

20060239696 - Conformal retro-modulator optical devices: A conformal retro-modulator optical apparatus. The apparatus includes an array of multiple quantum well devices disposed in a thin array. A plastic support element is bonded to the thin array, the plastic support element having a thickness greater that of the thin array. The plastic support element is preferably plastic...

20060239697 - Methods and apparatus for sensing multiple wavelengths simultaneously in a single wavelength sensing device: A method and system provide for sensing multiple wavelengths simultaneously in a single wavelength sensing device. The system may have a plurality of laser signals and a plurality of identifiable modulation signals. A respective laser signal of the plurality of laser signals is combined with a respective identifiable modulation signal...

20060233546 - Methods for testing optical transmitter components: Methods for testing optical components, such as laser diodes or light emitting diodes, that are manufactured for use in optical transmitters or transceivers. The testing methods are performed using a true RMS conversion circuit in a test apparatus. The testing methods are performed by receiving an optical signal with AC...

20060233547 - Optical network configuration for transmitting optical signals: An optical network configuration for transmitting optical signals is described, which comprises an entry point for coupling the optical network configuration to another network configuration, and an optical trail for transmitting data signals within the optical network configuration, wherein the entry point comprises an optical filter for coupling the other...

20060233548 - Private network link verification procedure in free space optical communication network: A system and method for verifying the integrity of a communication link in a wireless optical communication network. The system and method include monitoring the communication link on at least two levels and enabling or disabling signaling over the communication link appropriately depending on events reported through the system....

20060233549 - Optical switch and method for controlling optical path thereof: An optical switch is provided with: an optical matrix switch; and an optical path decision section which divides input light into two branches, supplies the input light of one divided branch to the optical matrix switch, demultiplexes the input light of the other divided branch into the light of individual...

20060233550 - Wavelength division multiplexed light source and passive optical network using the same: A wavelength division multiplexed light source for a passive optical network using the same includes broadband light sources arranged at a desired interval on a wavelength axis, so as to output wavelength bands each having a plurality of structural wavelengths. Further included is a main coarse wavelength division multiplexer (M-CWDM)...

20060233551 - Device and method for millimeter wave detection and block conversion: The device includes a first fiber optic transmitter (FOT) to receive a millimeter wave (MMW) signal and to generate a multiple sideband optical signal, and a second FOT to generate a second optical signal, from a reference signal. A first wavelength division multiplexing (WDM) optical filter is connected to the...

20060233552 - Method for preemphasising an optical multiplex signal: The invention relates to a method for easily and rapidly preemphasizing an optical multiplex signal transmitted by an emitter to a receiver consisting wherein signal-to-noise ratios are equalized by means of simple measurement or new adjustment of signal power on the bandwidth of the optical multiplex signal, at least in...

20060233553 - Optical transceiver module having adjustable signal polarity: A system and method for selective inversion of the polarity of differential electrical data signals in connection with the operation of an optical transceiver module is disclosed. In one embodiment, an optical transceiver module is disclosed and comprises a receiver optical subassembly in operable communication with dual receive data signal...

20060233554 - Optical fiber systems for delivering short high power pulses: Described is an optical fiber system for delivering ultrashort pulses with minimal distortions due to nonlinearity. The system is based on delivering the optical pulses in a higher order mode (HOM) of a few-moded fiber. The fiber is designed so that the dispersion for the HOM is very large. This...

20060233555 - Apparatus for optical clock extraction: Provided is an apparatus for an optical clock extraction, which is capable of providing high optical amplification rate and more efficient noise cancellation by using a Fabry-Perot (FP) filter and an optical amplifier. In the apparatus, an optical circulator changes a direction of an inputted optical signal. The FP filter...

20060233556 - Power source for a dispersion compensation fiber optic system: This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated signal. The optical filter may compensate for the dispersion in the fiber...

20060228111 - Wavelength-selective optical signal processing device: In a wavelength-selective optical signal processing device, an outcoupling filter for decomposing an incoming wavelength multiplex comprising a plurality of channels at different wavelengths into a first and a second group of channels and an incoupling filter for combining the first group after having passed through a processing unit and...

20060228112 - System and method for transmission and reception of traffic in optical light-trails: An optical network is provided that carries optical traffic in multiplexed wavelengths between a number of nodes. The network includes at least one light-trail associated with one of the wavelengths and established between a subset of the nodes in the network. The network also includes an out-of-band control channel that...

20060228113 - Passive optical network unit management and control interface support for a digital subscriber line network: An optical network unit for managing digital subscriber line (×DSL) connections to a passive optical network. According to one embodiment, the optical network unit comprises data structures in the form of managed entities that are issued by the optical network unit for managing each of the ×DSL connections. Each managed...

20060228115 - Add/drop multiplexer for otn/dwdm rings utilizing a pair of muxponders: Techniques for providing ADM functionality to an optical (OTN/DWDM) ring are provided. A pair of muxponder components are utilized to form a transparent ADM. In one muxponder, transmit signals are sent in a first direction and receive signals are received from a second direction. In the other muxponder, transmit signals...

20060228114 - Wavelength-selective routing using an optical add/drop architecture: A wavelength-selective routing capability is provided in a single network element by configuring the network element using a combination of add/drop network elements to route individual optical channels of WDM signals among a plurality of optical transmission paths coupled to the network element. Any optical channel of any WDM signal...

20060228116 - Method and apparatus for improving dual-polarization optical communication performance: A method and system for averaging the effects of polarization distortions across a multitude of transmitted data streams in a dual polarization multiplexed optical communications system. Data streams are interleaved amongst each other in accordance with a predetermined pattern. The interleaved data streams are symbol mapped and modulated to provide...

20060228117 - Optical transmission device and optical transmission system: The subject of the present invention is to provide an optical transmitting device and an optical transmission system, capable of realizing an increase of multiple channels and an extension of a transmission distance at a low cost. In the present invention, the external modulation process is applied to a first...

20060228118 - Method and system for 80 and 160 gigabit-per-second qrz transmission in 100 ghz optical bandwidth with enhanced receiver performance: Optical transmitter/receivers for use in a DWDM systems are provided. Transmission of data signals in a quadrature-return-to-zero (QRZ) format achieves a data transmission rate equal to eight times a base data rate, i.e., 80 Gbps over a 100 GHz channel if the base data rate is 10 Gbps, with high...

20060228119 - Method for the use of a local area fibre optic network for data communication at a bit rate of at least 30 gbps, a method for adapting a fibre optic network as well as a fibre optic network: The invention relates to a method for the use of a local area fibre optic network for enabling data communication. The method comprises the steps of supplying an intensity-modulated light signal to at least one fibre of the fibre optic network by means of a transmission unit and receiving the...

20060228120 - Multi-ring resonator implementation of optical spectrum reshaper for chirp managed laser technology: There is provided a fiber optic transmission system, comprising: an optical signal source adapted to produce a frequency modulated signal; and a multi-ring resonator optical spectrum reshaper (OSR) adapted to convert the frequency modulated signal into a substantially amplitude modulated signal. And there is provided a method for transmitting an...

20060228121 - Remote monitoring system and method: A remote control system for a modulatable device is provided. The remote control system comprises a receiver system coupled to the modulatable device and configured to obtain an output characteristic of the modulatable device, the receiver system being located remotely with respect to the modulatable device. The system further comprises...

20060222360 - System and method for protecting optical light-trails: Providing protection for a network includes establishing a light-trail through a sequence of nodes of an optical network, where the sequence of nodes is coupled by a first fiber and by a second fiber. Traffic is communicated through a plurality of connections of the light-trail, where a connection is operable...

20060222361 - Optical packet switching system: An optical packet switching system in which transmission quality, reliability, and system management in optical packet switching control are improved. An optical packet switch section includes semiconductor optical amplifiers as gate switches multistage-connected on paths along which optical packets sent from a plurality of input line cards are transmitted and...

20060222362 - Method of operating a passive optical network: The invention relates to a method of operating a passive optical network. The passive optical network comprises an optical line termination being connected via optical fibers to a number of network terminations. The method comprises the step of generating an optical signal to be transmitted on one of the optical...

20060222363 - Drop-and-continue device: Disclosed is a drop-and-continue device (84), provided between a signal converter (85) which supplies a signal to an end user and a wavelength-division multiplexing device (83) which comprises an optical demultiplexer (831) for separating an optical signal of a desired wavelength from an optical signal supplied from a head end...

20060222364 - Fault localization apparatus for optical line in wavelength division multiplexed passive optical network: A fault localization apparatus for an optical line in a wavelength division multiplexed passive optical network is disclosed. The apparatus can detect light loss and fault positions as a channel exhibiting an abnormal receiving state of signals received by each of the upstream receivers is checked, and a monitoring optical...

20060222365 - Scm-pon using wdm: A SCM-PON using WDM includes: an OLT for transferring downstream data from an external service provider through downstream optical signals and transferring upstream data transferred through upstream optical signals to an outside; an ODN for distributing the downstream optical signals from the OLT and multiplexing the upstream optical signals to...

20060222366 - Optical transmission apparatus: An optical transmission apparatus includes a demultiplexing unit that demultiplexes a light input to the optical transmission apparatus into a plurality of lights; an optical attenuator that adjusts an output level of a light within a band that includes a signal light from among demultiplexed lights; a bypass unit that...

20060222367 - Optical transmission apparatus: An optical transmission apparatus includes an optical add drop multiplexer (OADM) that adds/drops an optical signal to/from a transmission path. The optical transmission apparatus further includes a pump light multiplexer and a dispersion compensation fiber that are located downstream of the OADM on the transmission path. The optical transmission apparatus...

20060222368 - Multi-angle remote control: A multi-angle remote control device is disclosed. Two or more emitters are strategically placed such that an effective composite angular emission range of at least 180 degrees is achieved. This device is particularly well-suited for use within enclosures that are not amenable to reflecting signals from walls and other room...

20060222369 - Remote antenna unit and wavelength division multiplexing radio-over-fiber network: Disclosed is a remote antenna unit and a wavelength division multiplexing network. The remote antenna unit includes: an optical circulator having a plurality of ports; an electric field absorption modulator having a first input/output end and a second reflective end, the electric field absorption modulator configured to demodulate an optical...

20060222370 - Methods and apparatus for optical modulation amplitude measurement: Techniques for measuring optical modulation amplitude (OMA) are disclosed. For example, a technique for measuring an OMA value associated with an input signal includes the following steps/operations. The input signal is applied to a photodetector, wherein the photodetector is calibrated to have a given responsivity value R, and further wherein...

20060222371 - Optical communication system, transmission deterioration compensation method, optical transmission system, and optical receiver system: In an optical communication system, a pre-compensation is conducted for an influence of a polarization dispersion and a polarization dependent loss, which an optical signal transmitted from a transmitter station to a receiver station receives from a communication channel, at a transmitter station. The influence of the polarization dispersion and...

20060222372 - Mopa laser apparatus with two master oscillators for generating ultraviolet radiation: Laser apparatus including two different, pulsed MOPAs, one having a fundamental wavelength of 1064 nm and the other having a fundamental wavelength of 1564 nm, provide trains of optical pulses. The 1064-nm pulses are frequency tripled to 355 nm and the 1564-nm pulses are frequency doubled to 782 nm. The...

20060222373 - Methods for upgrading and deploying an optical network: A transmitter on an integrated circuit chip is disclosed that employs a laser, modulator, and a dispersion compensator module and a modulator for overcoming chromatic dispersion and polarization dependent loss effects. With the present invention, the dispersion compensator module is placed on a chip, either integrated or monolithic, for operation...

20060222374 - Modulation scheme for tedons: A system and method for increasing transmission distance and/or transmission data rates using tedons and an encoding scheme to reduce the number of ones in a data signal is described. The method for increasing transmission distance and transmission data rate of a fiber optical communications link using tedons comprises the...

20060222375 - Method and system for high bit rate fiber-optic communications: A method and system for high bit rate fiber-optic communications utilize a wavelength tunable transmitter controlled by a feedback signal from an error analyzer associated with a received optical data stream....

20060222376 - Optical reception device and optical reception method: The present invention has been made in order to realize an optical signal receiving equipment that can suppress fluctuations in soft decision error correction capabilities in accordance with manufacturing difference in individual deciders or deterioration over time. The optical signal receiving equipment includes: an optical-electrical converting means for converting received...

20060222377 - Optical receiver corresponding to differential m-phase shift keying system: A small size and low cost optical receiving apparatus, which can stably demodulate the signal, lights in accordance with the differential M-phase shift keying (DMPSK) system. An optical receiving apparatus comprises a light branching unit for branching the differential M-phase shift keying signal beam into four signal light beams, a...