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| Number | Title | Issue Date |
| 7664406 | Optical line terminal in a wavelength division multiplexing passive optical network An OLT in a WDM-PON may include a main board and a sub board. The main board may include a master optical transmitting/receiving control/supervising section and the sub board may include a plurality of optical transceivers and a slave optical transmitting/receiving ... | 02/16/2010 |
| 7536109 | Optical network system and device, and method for controlling optical network and device When entering an idling state, a master unit M transmits an optical signal for polling addressed to each slave unit S-1 to S-n. The slave unit S-n located at the lowest rank of a direct chain constituted by S-1 to S-n, when receiving the optical signal... | 05/19/2009 |
| 7433603 | Using active and passive optical components for an optical network In one embodiment, the present invention includes a network hub having an active optical encoder where the network hub is to generate a plurality of addressed optical data signals, each having a common carrier wavelength and a different address corresponding to a ne... | 10/07/2008 |
| 7209664 | Frequency agile transmitter and receiver architecture for DWDM systems A frequency-agile optical transceiver includes a shared local oscillator (LO), a coherent optical receiver and an optical transmitter. The LO operates to generate a respective LO optical signal having a predetermined LO wavelength. The coherent optical receiver is o... | 04/24/2007 |
| 7200334 | System for transmitting digital signals in a space vehicle The invention relates to a system for conveying digital signals inside a space vehicle between a transmitter and a receiver. In the invention, the link between the transmitter and the receiver comprises a first portion made of optical fiber and a second portion in w... | 04/03/2007 |
| 7139487 | Light burst transmission/reception control system, parent station device used in the same, child station device, and light burst transmission/reception control method A host station apparatus (10) generates band allocation information including identifications of slave station apparatuses (20-1 through 200-n) and types of data to be transmitted by the slave station apparatuses and posts the information... | 11/21/2006 |
| 7099443 | Fiber optic internet protocol network interface device and methods and systems for using the same A network interface device located at a customer's premises includes an external interface that receives a plurality of telecommunication services via a fiber optic connection from a telecommunication service provider. The services are received using Internet Protoc... | 08/29/2006 |
| 7085495 | System for flexible multiple broadcast service delivery over a WDM passive optical network based on RF block-conversion of RF service bands within wavelength bands A system and method for simultaneous delivery of a plurality of independent blocks of 500 MHz digital broadcast television services, stacking a plurality of RF blocks on a plurality of spectrally sliced WDM optical bands. The method for delivering a plurality of vid... | 08/01/2006 |
| 7076175 | Method of setting up two-way optical communication between a central unit and a remote unit A method of setting up two-way optical communication between a central unit and a remote unit suitable for operating in a given communication mode selected from a plurality of communication modes. A plurality of frame patterns is defined in the central unit, with ea... | 07/11/2006 |
| 7065298 | Code-based optical networks, methods, and apparatus Optical communication systems include a central station that encodes data transmitted to multiplexing (mux) stations or user stations. The central station also decodes data received from the mux stations or user stations. Encoding and decoding are performed using co... | 06/20/2006 |
| 6970653 | Fiberoptic system for communicating between a central office and a downstream station A fiber optic system for communicating between a central office and a downstream station is described. The central office has a TX unit, an RX unit and a continuous wave (“CW”) laser. Each station has an RX unit and a tunable filter coupling the RX unit to the c... | 11/29/2005 |
| 6922407 | HomePNA 10M8 compliant transceiver The present invention provides a method and system of transceiving a data signal in a HomePNA type network. The transceiver enables digital signal processing of the data signal compliant with the HomePNA 10M8 specification in an Open System Interconnection type netw... | 07/26/2005 |
| 6623187 | Wireless optical communication system and wireless optical communication method A wireless optical communication system can reduce the power consumption needed for light emission by a controlled node and suppress a modulated signal component, other than the modulated signal of input data for transmission, in the modulated signal comp... | 09/23/2003 |
| 6570693 | Reverse path optical combining using an optical commutator An optical commutator (310) for combining optical signals emanating from a plurality of optical transmitters (305a-n). The commutator (310) includes a plurality of input ports connected to each optical transmitter (305a-n) via an optical fiber (315a-n). T... | 05/27/2003 |
| 6570692 | Communication network based on the atmospheric transmission of light A point-to-multipoint bi-directional wide area telecommunications network employing atmospheric optical communication. The network comprises a primary transceiver unit, a plurality of subscriber transceiver units and an optical router. The primary transce... | 05/27/2003 |
| 6433906 | Digital optical receiver for cable television systems A cable television system (400) includes a transmitter (200) for generating a digital optical signal and a receiver (201) for receiving such digital optical signal and converting it to an analog signal. The receiver (201) includes a digital filter (300) d... | 08/13/2002 |
| 6392770 | Multi-point optical transmission system Radio base stations subject each code-division multiplex signal to frequency conversion so as to vary each frequency thereof according to the radio base stations and then converts the signal to an optical signal before transmitting the same to a switching... | 05/21/2002 |
| 6137607 | Broadband communications method and apparatus for reducing optical beat interference A method and apparatus for substantially reducing OBI on optical networks in which a number of source lasers operate simultaneously and the output from the lasers is subsequently combined in the network. The method involves operating the laser in burst mo... | 10/24/2000 |
| 6118565 | Coherent optical communication system A coherent optical system includes an optical coupler or combiner for combining a received upstream optical signal and an optical local oscillator signal. The coherent optical system further includes a coherent optical receiver which is configured to rece... | 09/12/2000 |
| 6002502 | Switchable optical network unit A switch in an optical network unit selectively couples line side ports of the line cards of the unit to individual line circuits in drop cable wiring extending to the customer premises served by the unit. The switchable optical network unit (SONU) permit... | 12/14/1999 |
| 5991058 | Method and apparatus for a network comprising a fourier plane photonics package A photonics package, and methods for its use are disclosed. In one configuration, a collimating lens is disposed between a photonics device and a ferrule containing two optical fibers. Preferably, one of the fibers delivers an optical signal to the photon... | 11/23/1999 |
| 5978117 | Dynamic reconfiguration of a wireless network using flexible wavelenght multiplexing A wireless communication system which is reconfigurable to accommodate varying traffic density is provided by using a flexible optical interface between a base station controller and several base stations. Communication between the base station controller... | 11/02/1999 |
| 5963350 | Optical telecommunications network An optical telecommunication system includes a number of transparent passive optical networks (TONs). Each TON connects a respective group of terminals and the head end of each TON is connected to a common central switching node. Each terminal includes se... | 10/05/1999 |
| 5956169 | Bidirectional optical burst transmission In bidirectional optical burst transmission using a single optical fiber, a signal is reliably discriminated even if reflected light is contained in a received optical signal. According to a first aspect of the invention, the received signal converted int... | 09/21/1999 |
| 5936753 | Optical network system An optical network system for bidirectional transmission between a main system (e.g., central station) and a plurality of auxiliary systems (e.g., subscriber's stations). The main system outputs a main optical signal to a main fiber. The auxiliary systems... | 08/10/1999 |
| 5914799 | Optical network Optical network for signal transfer from a central station to subscriber stations. The signal to be distributed is split in at least two stages, with the signal being amplified by optical amplifiers. The Erbium Doped Fiber Amplifiers (EDFAs) to be used fo... | 06/22/1999 |
| 5912998 | Optical network with repeater at a split-level of the network An optical network includes a head-end station connected to a plurality of optical network units via an optical fiber network having a plurality of split levels. One level of split is constituted by a n:1 repeater provided with a monitor for ranging and l... | 06/15/1999 |
| 5911019 | Method for upgrading a hybrid fiber coax network to an all fiber network Disclosed is a method for making the transition from a hybrid network into an all fiber network. In the preferred embodiment, the first step is to replace an existing fiber optic/coaxial cable conversion device located at a remote node with an optic distr... | 06/08/1999 |
| 5903372 | Means for remote addition of video services to subscribers The present invention details an apparatus for distribution of video and telephony services on a single twisted wire pair to each of a plurality of subscribers, comprising an optical network unit (ONU) connected by means of an optical fiber to a remote te... | 05/11/1999 |
| 5872644 | Fiber-optic access system for subscriber optical communication A fiber-optic access system for subscriber optical communication adopting star type topology in an optical fiber network includes a central office, a plurality of optical network units, an optical interface, and a signal recognition/reproduction and clock... | 02/16/1999 |
| 5864415 | Fiber optic network with wavelength-division-multiplexed transmission to customer premises A fiber optic network comprises an optical fiber connection (one fiber or two) from a central office to an intelligent interface device in the subscriber's premises. The central office includes a serving node transceiver providing communication links to/f... | 01/26/1999 |
| 5854703 | Hybrid fiber coax communications network A hybrid fiber coax communications system includes plural coaxial distribution plants, fiber optic nodes, fiber optic links and a headend. At least one subscriber is coupled to each coaxial distribution plant. In the upstream signal path, the upstream sig... | 12/29/1998 |
| 5822102 | Passive optical network employing upconverted 16-cap signals At a central facility, information for a user is converted to a carrierless AM/PM (CAP) signal, upconverted, combined with other upconverted signals destined for other users and transmitted via an analog optical fiber optic line to an optical network unit... | 10/13/1998 |
| 5812296 | Fiber optics transmission system In a fiber optics transmission system in which a plurality of access units are cascade-connected via up-link and down-link optical fiber lines and connected to a base unit, the base unit has a beat noise detector and a noise information generator and, upo... | 09/22/1998 |
| 5808764 | Multiple star, passive optical network based on remote interrogation of terminal equipment A multiple star implementation of RITE-Net™ type structure is implemented hereby. The structure provides an economical way of introducing PONs by serving a greatly increased number of subscribing ONUs for each fiber leaving the central office. According... | 09/15/1998 |
| 5796503 | Optical communication system wherein optical beat interference at the center is reduced An optical communication system is described wherein a center (1) and distant terminals (3, 4) are connected to a fiber-optic network (2). Each of the terminals (3, 4) has a light source (5, 7) and a modulator (6, 8) connected thereto for transmitting opt... | 08/18/1998 |
| 5793770 | High-performance parallel interface to synchronous optical network gateway A digital system provides sending and receiving gateways for HIPPI interfaces. Electronic logic circuitry formats data signals and overhead signals in a data frame that is suitable for transmission over a connecting fiber optic link. Multiplexers route th... | 08/11/1998 |
| 5786913 | Optical TDMA ring network with a central transmitting and receiving device An optical ring network with a plurality of network elements (#1, . . . , #N) is disclosed which contains only a single laser diode (2). This laser diode (2) is controlled to produce optical pulses of constant repetition frequency. Each network element (#... | 07/28/1998 |
| 5771111 | Optical network Disclosed is an optical network which has a plurality of subordinate optical networks, each of which being connected with a plurality of optical terminals which function as a transmitter and a receiver of a signal light, wherein multiplexing of transmissi... | 06/23/1998 |
| 5745269 | Method for the management of wavelength-division-multiplexed optical loops A method for the management of a one-directional optical management loop with optical frequency multiplexing. This method is characterized chiefly in that the central station (T) instructs a secondary station (Si) that it designates to tune its reception ... | 04/28/1998 |
