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| Number | Title | Issue Date |
| 8150259 | Passive optical network system and optical signal receiving method thereof A passive optical network system includes: a plurality of optical signal splitter receiving optical signals from a plurality of optical network units (ONUs) to provide a plurality of upstream optical signals having different wavelengths; a hybrid optical filter mult... | 04/03/2012 |
| 8081875 | Wavelength switch The present invention relates to a wavelength switch including two switching stages. A single actuation array of reflecting elements of a first switching stage routes sub-beams at different wavelength bands to a plurality of actuation arrays of reflecting elements o... | 12/20/2011 |
| 8036529 | Wavelength conversion apparatus in time division multiplexing—passive optical network system based on wavelength division multiplexing system, and optical transmission apparatus and method using the same Provided are a wavelength conversion apparatus in a Time Division Multiplexing Passive Optical Network (TDM-PON) system based on a Wavelength Division Multiplexing (WDM) system, and an optical transmission method using the wavelength conversion apparatus. Each subsc... | 10/11/2011 |
| 8009985 | Traffic driven variable bandwidth optical transmission Link bandwidth is varied based on the subscriber traffic load. Varying the link bandwidth has the effect of varying the actual noise margin of the link (in an inverse relation), so that the noise margin will vary inversely with the traffic load. A beneficial result ... | 08/30/2011 |
| 7953323 | Time multiplexed space switch The present invention provides an optical time multiplexed space switch including a pulsed laser source, and means for producing from the laser source a plurality of wavelengths of pulsed radiation including means for providing permutable multi-wavelength pulse sequ... | 05/31/2011 |
| 7831146 | Time and wavelength-shifted dynamic bidirectional system A bidirectional optical network, in which an incoming/downstream modulated optical signal(s) of a particular wavelength may carry content from a headend to a subscriber. An incoming/downstream unmodulated continuous wave optical signal(s) from the headend is time-sh... | 11/09/2010 |
| 7809265 | Multi-hop optical communication network An apparatus includes a time-domain wavelength-interleaved optical network that connects a plurality of edge nodes. Each of the edge nodes is configured to receive optical communications from others of the edge nodes on an associated wavelength-channel. The number o... | 10/05/2010 |
| 7734176 | Hybrid optical burst switching with fixed time slot architecture A system and method for a cell switching optical network. A block of data is buffered at an edge node and sliced into data slices. Slice headers are pre-appended to each data slice. The data slices are then scheduled for transmission onto an optical switching networ... | 06/08/2010 |
| 7725027 | Multi-unit wavelength dispersive device The multi-unit wavelength switch enables multiple independent wavelength switching of a plurality of incoming multiplexed optical beams simultaneously on the same optical platform. The different units can have similar functionality or provide disparate functionality... | 05/25/2010 |
| 7720378 | Optical module and optical switch In the optical module, the number of optical components is decreased, so that the costs of the device are reduced, and so that optical loss is reduced. The present device comprises: an optical gate array in which a plurality of optical gate switches each employing a... | 05/18/2010 |
| 7720379 | Optical packet switching apparatus and methods An optical packet switch switches optical packets according to bit-rates at which the optical packets are provided. For example, optical packets that are received at similar bit-rates may be routed to a destination at separate time slots over a single channel wavele... | 05/18/2010 |
| 7706686 | Router with resource add-drop functionality A router includes a first processing module (1) adapted to route primary resources as a function of instructions received, inputs (2) adapted to feed the first processing module (1) with primary resources, outputs (3) adapted to collect p... | 04/27/2010 |
| 7596316 | Method of sending packet-formed information optically using different wave-lengths for address and useful information The invention relates to a method and a system for the transferring of packet-switched information in a telecommunication system which comprises a router (R) to which an optical cable (LC) is connected that consists of optical fibres (LF) to which two wavelengths of... | 09/29/2009 |
| 7499649 | Method for optimising a mostly optical network Method for forming the virtual topology of an ATM-layer where the ATM-layer is carried over an optical network, where inputs such as the physical topology and constraints of physical nature are given, thereafter forming node-pairs with end-to-end connections accordi... | 03/03/2009 |
| 7466914 | Optoelectronic switch having cascaded optical nodes An optical switch assembly is provided having a plurality of optoelectronic switching nodes. Each node is a three terminal optical device having a first optical input, a second optical input and an optical output. Each node can be electrically activated or deactivat... | 12/16/2008 |
| 7450845 | Expandable universal network A wide-coverage high-capacity network that scales to multiples of petabits per second is disclosed. The network comprises numerous universal edge nodes interconnected by numerous disjoint optical core connectors of moderate sizes so that a route set for any edge-nod... | 11/11/2008 |
| 7442912 | Optical logic device responsive to pulsed signals An optical logic device performs a logic operation on a plurality of input light signals. The optical logic device has a photoelectric conversion portion, in which photoreceivers for receiving input light signals are provided in parallel, that outputs an electric si... | 10/28/2008 |
| 7426210 | Port-to-port, non-blocking, scalable optical router architecture and method for routing optical traffic One embodiment of the present invention includes a router comprising an ingress edge unit with one or more ports and an egress edge unit with one or more ports connected by a switch fabric. The ingress edge unit can receive optical data and convert the optical data ... | 09/16/2008 |
| 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 |
| 7397792 | Virtual burst-switching networks A time-shared network comprising edge nodes and optical core nodes may be dynamically divided into several embedded networks, each of which covering selected edge nodes. At least one of the edge nodes may host an embedded-network controller operable to form multiple... | 07/08/2008 |
| 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 |
| 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 |
| 7368700 | Optical switch apparatus and optical switching system In an optical switch apparatus which continuously carries out the route switching on frame signal light inputted from various routes while eliminating differences in output power value, a first delaying unit, which is interposed between a first branching unit and an... | 05/06/2008 |
| 7366413 | Modular cross connect system with 3D-MEMS for optical telecommunication networks A modular cross connect system for optical telecommunication networks has the optical unit divided in at least two main bodies with one section for connection comprising the collimators and a main commutation section with MEMS devices. The first section is a fixed p... | 04/29/2008 |
| 7340175 | Non-uniform optical waveband aggregator and deaggregator and hierarchical hybrid optical cross-connect system Hierarchical hybrid optical networking is based on balancing cost and performance of optical networks by providing transparent (optical) switching of subsets of wavelengths in addition to opaque (electrical) switching of individual light paths. Effective use of wave... | 03/04/2008 |
| 7340168 | System and method for optically labeled packet transmission A system and method for transmitting optically labeled packets using DPSK/ASK modulation. The system comprises a transmitter including at least two modulators adapted to provide DPSK modulation of a payload portion of optically labeled packets and ASK modulation for... | 03/04/2008 |
| 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 |
| 7333424 | Upper layer node, lower layer node, and node control method An upper layer node is used in a multi-layer network which includes an upper layer network which performs switching and transfer in units of packets, and a lower layer network which includes optical transmission lines and optical switches and accommodate the upper l... | 02/19/2008 |
| 7332234 | Optoelectronic device capable of participating in in-band traffic An optoelectronic device that has a network address (e.g., IF address) and participates in in-band traffic for purposes of performing functions (e.g., network diagnostics, network control, network provisioning, fault isolation, etc.) that are traditionally performed... | 02/19/2008 |
| 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 |
| 7330617 | Wavelength selective optical switch, and optical device provided with spectroscopic function A wavelength selective optical switch of the present invention separates a WDM light emitted from an input port of an input and output optical system, according to wavelengths, by a diffraction grating, and thereafter, condenses the lights of respective wavelengths ... | 02/12/2008 |
| 7324548 | Transceiver system and method supporting variable rates and multiple protocols Present herein is a multirate transceiver wherein data can be received at a first data rate and transmitted at a second data rate. The transceiver device comprises a first interface for receiving data at one data rate a mapper that can map data from a first rate to ... | 01/29/2008 |
| 7317873 | 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... | 01/08/2008 |
| 7315693 | Dynamic route discovery for optical switched networks An architecture and method for performing dynamic route discovery and variable time slot reservation provisioning within optical-switched networks. The method employs extensions to the RSVP-TE signaling protocol, which uses various messages to reserve network resour... | 01/01/2008 |
| 7312909 | Method for synchronizing the phase of optical return-to-zero (RZ) data signals In order to synchronize the phases of two RZ data signals (RZS1, RZS2) combined to form a time multiplex signal (MS1), the power of half the fundamental made of the multiplex signal (MS1) is measured and the phase difference is controlled... | 12/25/2007 |
| 7313329 | All optical variable buffer queue useful in optical packet networks A variable optical buffer queue, particularly useful either as an input or an output queue in an optical packet router in a wavelength-division multiplexing (WDM) communication network. An input queue includes plural separately controllable optical delay units dispo... | 12/25/2007 |
| 7305186 | Method and apparatus for scheduling communication using a star switching fabric In one embodiment, a scheduler for use with a star switching fabric includes a scheduling star switching fabric operable to receive a plurality of packets each associated with one of a plurality of wavelengths and a plurality of selecting elements associated with th... | 12/04/2007 |
| 7298973 | Architecture, method and system of multiple high-speed servers to network in WDM based photonic burst-switched networks A modular reconfigurable multi-server system for use in a wavelength-division-multiplexed based photonic burst switched (PBS) network with variable time slot provisioning. An optical high-speed I/O module within the multi-server system enables it to serve as an edge... | 11/20/2007 |
| 7295366 | Optical integrated device and optical module An optical integrated device includes a plurality of input optical waveguides connected respectively to a plurality of input ports provided on one end face of the optical integrated device, a single output optical waveguide connected to an output port, an optical co... | 11/13/2007 |
| 7292784 | High speed optical routing apparatus and method A high speed optical routing apparatus and method, in which data traffic, such as an IP packet, an Ethernet frame, etc., is switched in an optical frame unit at a high speed. The apparatus is provided with a plurality of input and output ports, and with one add port... | 11/06/2007 |
