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| Number | Title | Issue Date |
| 8126328 | Communication apparatus and signal transmitting method A communication apparatus time-division multiplexes a first signal transmitted at a first bit rate and a second signal transmitted at a second bit rate which is an integer multiple of the first bit rate, and sends out the first signal and the second signal to one li... | 02/28/2012 |
| 8055134 | Optical telecommunications network and method An optical communications network architecture and associated method which employs time and wavelength-interleaving for homing between nodes/satellites and hubs and for grooming, while employing wavelength-division-multiplexed wavelength circuits between hubs withou... | 11/08/2011 |
| 8055133 | TDM/WDMA passive optical network device A time division multiplex (TDM)/wavelength division multiple access (WDMA) passive optical network (PON) device includes a base station terminal, a wavelength splitter, and a subscriber terminal optical transceiver. The base station terminal includes a transmitter, ... | 11/08/2011 |
| 8041217 | System and method for managing wavelength drift in an optical network In accordance with the teachings of the present invention, a system and method for managing wavelength drift in an optical network is provided. In a particular embodiment, the method includes receiving traffic in one or more optical channels transmitted by one or mo... | 10/18/2011 |
| 7957647 | Passive optical network system and ranging method In a WDM-PON system wherein a plurality of ONUs transfer signals by sharing wavelengths, one wavelength dedicated to a ranging procedure is set, and the ranging is performed with only the dedicated wavelength, so as to measure reciprocating delay times. At the other... | 06/07/2011 |
| 7957646 | Optical time division multiplexing transmitter The optical time division multiplexer generates a time-division-multiplexed optical signal by time-division-multiplexing optical signals of a plurality of channels, the carrier-wave phases of which are shifted with respect to one another. The circulator guides the m... | 06/07/2011 |
| 7885544 | Device for temporal subsampling of an OTDM optical signal, OTDM-WDM converter comprising same and OTDM-WDM converter The invention concerns a device for temporal subsampling of an OTDM optical signal at a predetermined subsampling frequency, comprising a generator (10) for generating clock pulses transmitted at the predetermined subsampling frequency and at a conversion wav... | 02/08/2011 |
| 7844180 | Optical device and a method for converting WDM signals into an OTDM signal and vice versa The invention relates to a device and a method for converting WDM signals into an OTDM signal. The device comprises shifting means (102, 103, 104) adapted to introduce a time shift between the pulses of the WDM signals carried by the optical carriers, modulat... | 11/30/2010 |
| 7826745 | Open fiber control and loss of light propagation in time division multiplexed inter-system channel link A method and apparatus for transmitting signals from a plurality of input channels over a TDM optical network, where each of the input channels contains an optical data signal and an electrical control signal containing control information relating to the optical da... | 11/02/2010 |
| 7729615 | Method for transmitting overhead information for wavelength division multiplex networks for fibre-optic information transmission A method for transmitting signaling and control information for wavelength-division multiplex networks for optical, fiber-bound information transfer in digitized form, the signaling and control information being transmitted via the same optical channel, particularly... | 06/01/2010 |
| 7720382 | Time-domain wavelength interleaved network with communications via hub node A system and method are disclosed for time-domain wavelength interleaved networking that reduce the need for complex time-slot scheduling and reduce the routing complexity. Substantially all communications in the time-domain wavelength interleaved network pass throu... | 05/18/2010 |
| 7646979 | Multiple access protocol system and related techniques for multi-gigabit optical wavelength division multiplexed local area networks A system for simultaneously transmitting and receiving multiple data messages on a unidirectional ring having a plurality of nodes coupled thereto is described. This technique utilizes a medium access (MAC) protocol for a multi-gigabit-per-second local-area optical ... | 01/12/2010 |
| 7643754 | Method of and apparatus for providing multi-wavelength light source A method of providing a multi-wavelength light source includes the steps of modulating an optical pulse source so as to output optical pulses with a designated repetition frequency, time-division multiplexing the optical pulses output by the optical pulse source so ... | 01/05/2010 |
| 7627247 | Optical time division multiplexing A method of multiplexing optical signals in a node of an optical network including as inputs a plurality of electrical signals, a plurality of laser transmitters, and as outputs a plurality of optical fibers, (a) generating clock pulses as a first clock frequency; (... | 12/01/2009 |
| 7599624 | System and method for switching channels using tunable laser diodes A channel switching function is added to a wavelength division multiplexing passive optical network (WDM-PON) system, which is an access optical network system, and the potential transmission rate is increased by combining wide wavelength tunable lasers and a time d... | 10/06/2009 |
| 7590353 | System and method for bandwidth allocation in an optical light-trail The present invention relates to allocating the use of optical light-trails. Optical light-trails enable a plurality of nodes included in a light-trail to share the use of an optical wavelength to transmit traffic between the nodes included in the light-trail. A met... | 09/15/2009 |
| 7577363 | Optical device and method of converting WDM signals into an OTDM signal and vice versa A device and a method for converting WDM signals into an OTDM signal. A time shift is introduced between the pulses of the WDM signals carried by the optical carriers. A modulation means is (112, 113, 114) adapted to modify the optical power of the WDM signal... | 08/18/2009 |
| 7483633 | Optical communication network An optical communication network using a communication system which is combined optical time-division multiplexing and optical wavelength-division multiplexing. The electric/optical converter converts an electric signal strings, which are input from the outside, int... | 01/27/2009 |
| 7421203 | Method for transmitting packet in wireless access network based on wavelength identification code scheme A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and a... | 09/02/2008 |
| 7412169 | FTTH system for convergence of broadcasting and communication through switched broadcasting A fiber to the home FTTH network for convergence of broadcasting and communication is disclosed. The network includes: an OLT for receiving and converting a first predetermined number of broadcast signals and an Ethernet signal into a plurality of converted optical ... | 08/12/2008 |
| 7411947 | Storage system, computer system and interface module An interface module comprises a serial signal transceiver to be connected to an external transmission path and an interface processing unit connected to the transceiver. The interface processing unit comprises a serializer/deserializer circuit, an encoder/decoder, a... | 08/12/2008 |
| 7403712 | Matrix time division multiplex (MTDM) interrogation Embodiments of present system encompass: a plurality of laser sources that produce a plurality of respectively different optical wavelengths; a matrix switch having a plurality of inputs operatively coupled to the plurality of laser sources, each of the plurality of... | 07/22/2008 |
| 7394985 | Wavelength access server (WAS) architecture A wavelength access server (WAS) architecture provides aggregation of traffic streams of diverse data communication protocols as well as provision of wavelength resources in an optical transport network. The WAS provides functions such as service traffic adaptation,... | 07/01/2008 |
| 7386236 | Multiple wavelength TDMA optical network A passive optical network which employs multiple wavelengths to increase overall system bandwidth, with each wavelength being shared by multiple optical network units (ONUs) according to a time division multiple access (TDMA) protocol. The upstream TDMA traffic ther... | 06/10/2008 |
| 7376349 | Analog to digital converter systems and methods Systems and methods are disclosed herein to provide analog-to-digital converter techniques. For example, in accordance with an embodiment of the present invention, an analog-to-digital converter architecture is disclosed that utilizes optical techniques to convert a... | 05/20/2008 |
| 7373084 | Optical network termination device for use in passive optical network based on WDM/SCM scheme A termination device for use in a WDM-SCM PON system can effectively support a multi-channel integration function of a WDM/SCM PON system. The termination device contained in a termination end of a WDM/SCM (Wavelength Division Multiplexing/Sub-Carrier Multiplexing) ... | 05/13/2008 |
| 7369771 | Optical network terminator and optical network connection method using it An optical network terminator of the present invention includes an optical wavelength division multiplexer for receiving an optical signal and incoherent light. An optical detection unit converts a downstream high speed and low speed optical signals into electrical ... | 05/06/2008 |
| 7369769 | Ethernet passive optical network ring and its method of authorization and collision detection An Ethernet passive optical network (EPON) ring for providing protection against fiber failures. The optical network unit (ONU) is coupled to the ring fiber by a three-port passive optical splitting module that has three two-way optical passages. By the three two-wa... | 05/06/2008 |
| 7352967 | Data transmission system A data transmission system includes subscriber units and a central office unit which are interconnected via optical fibers. The central office unit multiplexes a video signal with signals other than the video signal to deliver them to the multiple subscriber units. ... | 04/01/2008 |
| 7349630 | Hybrid WDM/TDM network architecture A method and apparatus for configuring a server/client network architecture. A server network device impresses an optical signal onto an optical link at a specified wavelength, where distinct wavelengths are associated with one or more of a plurality of client devic... | 03/25/2008 |
| 7340172 | Optical WDM-TDM network An optical WDM-TDM network includes a plurality of devices, each of the devices including at least one optical add/drop device adapted to drop optical signals of at least one channel of a plurality of received channels and pass through the remaining channels, at lea... | 03/04/2008 |
| 7340176 | Metropolitan area type optical telecommunications network comprising a ring type core An optical telecommunications network (1000), of metropolitan area type, having a ring type core (10), and secondary rings (41, 42; 43, 44). In each sending access node (11), transmitters (111) for sending information-carrying opti... | 03/04/2008 |
| 7333687 | Dual-filter architecture for reduced dispersion Chromatic dispersion of thin-film based mux/demux and add/drop modules can be reduced. Thin-film devices can be arranged in a specific order in the module. Multiple kinds of filters are used to remove “even” and “odd” channels, or other divisions of channels... | 02/19/2008 |
| 7333737 | Optical receiver There is provided an optical receiver in which a time gate can be realized with a simple, low-cost configuration, and which has few aspects that require adjustment. The optical receiver of the present invention comprises a decoding circuit in which optical signals w... | 02/19/2008 |
| 7330657 | Method to demultiplex wavelengths of light An apparatus and method for demultiplexing multiple wavelengths of light. In one embodiment, an optical signal having a plurality of wavelengths is provided to an optical-to-electrical (OE) circuit configured to convert optical signals into electrical signals. The o... | 02/12/2008 |
| 7330656 | Passive optical network employing code division multiple access A PON and a method of transmitting data employing different upstream and downstream transmission protocols are disclosed. The PON includes: a plurality of ONTs; WDM filters; an OLT receiving and transmitting optical signals to and from the ONTs and a higher network;... | 02/12/2008 |
| 7330660 | Optical time division multiplexer A TDM comprising: (a) at least two wavelength-tunable devices for outputting a signal, each wavelength-tunable device being adapted to change signal wavelength in response to a change signal; (b) a plurality of on-off gates, one on-off gate being coupled to the outp... | 02/12/2008 |
| 7324753 | Optical communication network using a code division multiplexing method The present invention is a high-speed and low-cost optical communication network. A preferred embodiment of this optical communication network comprises an accommodation device, optical couplers that are connected to corresponding ports of this accommodation device,... | 01/29/2008 |
| 7321731 | Optical pulse position modulation discriminator Systems and methods are disclosed herein to provide various optical techniques. For example, in accordance with an embodiment of the present invention, a pulse position modulation discriminator architecture is disclosed for discriminating temporal positions of PPM-e... | 01/22/2008 |
| 7315557 | Multi-wavelength light source apparatus A pulse sequence is configured by making a pulse waveform output from a pulse light source into a super Gaussian pulse of the third order or higher, and input to a spectrum expanding device. The spectrum expanding device broadens the spectrum of the pulse sequence w... | 01/01/2008 |
