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| Number | Title | Issue Date |
| 8190025 | Wavelength selective switch having distinct planes of operation A wavelength selective switch utilizing aperture-shared optics and functionally distinct planes of operation that enables high fiber port counts, such as 1×41, and multiplicative expansion, such as to 1×83 or 1×145, by utilizing elements optimized for performance... | 05/29/2012 |
| 8145056 | Distributed wavelength conversion control for signaling protocols A network component comprising at least one processor configured to implement a method comprising obtaining a wavelength availability information for a path, determining whether to implement a wavelength assignment based on the wavelength availability information, u... | 03/27/2012 |
| 8121477 | Optical node apparatus The present invention is directed to an optical node apparatus in which the number of light elements that propagates reference light is reduced, which includes pa input-side wavelength mux/demux elements, a switch module, pb output-side wavelength mux/demux elements... | 02/21/2012 |
| 8059960 | Path computation element method to support routing and wavelength assignment in wavelength switched optical networks A network component comprising at least one processor configured to implement a method comprising transmitting a request to compute a routing assignment, a wavelength assignment, or both, wherein the request comprises a lightpath constraint indicator is disclosed. A... | 11/15/2011 |
| 8045854 | M×N wavelength selective optical switch A M×N wavelength selective optical switch (WSS) for switching K wavelength channels is disclosed. The WSS has two MEMS micromirror arrays, a M×K array and a 1×N array, for switching any wavelength channel from any input port to any output port, provided that any ... | 10/25/2011 |
| 8032024 | Method and apparatus for multi-band optical switching using multi-pump parametric devices A method of multiple-band switching using a multi-pump fiber parametric switch is demonstrated. The switching architecture combines parametric band amplification, wavelength conversion and selective signal conjugation, enabled by temporal control of at least one pum... | 10/04/2011 |
| 7697843 | Modular add/drop multiplexer including a wavelength selective switch Consistent with the present invention, tunable demultiplexers are provided in WSS-based add/drop multiplexer. The tunable demultiplexers are modular and thus allow the add/drop multiplexer to be readily expandable, and facilitate flexible add/drop capabilities where... | 04/13/2010 |
| 7599619 | Wavelength division multiplexed optical communication system having a reconfigurable optical switch and a tunable backup laser transmitter In a WDM optical communication system that includes a plurality of nodes interconnected by communication links, a node is provided that includes a reconfigurable optical switch having a plurality of input ports and at least one output port. The node also includes a ... | 10/06/2009 |
| 7522836 | Optical logic gate based optical router A switching element capable of being used in an optical processing device includes an optical signal separator operable to separate a multiple wavelength optical signal into one or more optical signal wavelengths. The switching element further includes a plurality o... | 04/21/2009 |
| 7434249 | FTTH PON that O/E converts 1310 nm for output to transmitters for E/O as 1550 nm A fiber to the home (FTTH) system based on a passive optical network (PON) includes an optical line terminal (OLT) block, an optical network terminal (ONT) block, and an optical distribution network (ODN). The ONT block includes a video-optical line terminal (V-OLT)... | 10/07/2008 |
| 7433594 | Node apparatus, optical wavelength division multiplexing network, and system switching method An optical wavelength division multiplexing network has a multi-level structure where a plurality of optical network units (ONUs) are connected to a lowest-level network. A node apparatus connected to networks other than the lowest-level network includes (a) passive... | 10/07/2008 |
| 7428384 | Optical router According the invention, a multiplexed light composed of a signal light of a signal wavelength, and a first route control light of a first route control wavelength different from the signal wavelength or a second route control light of a second route control wavelen... | 09/23/2008 |
| 7428383 | Architecture, method and system of WDM-based photonic burst switched networks An intelligent photonic burst switched (PBS) network includes edge nodes and switching nodes. The PBS edge node includes a flow classifier, flow manager, and ingress/egress PBS MAC layer components. The flow classifier classifies information received from outside th... | 09/23/2008 |
| 7426347 | Shared optical performance monitoring An apparatus for shared optical performance monitoring (OPM) is provided. A wavelength sensitive device receives light at an input port and routes it wavelength selectively to a set of output ports. To perform optical performance monitoring on the output ports, a mo... | 09/16/2008 |
| 7421201 | Route determination method used in optical signal transmission system A method of determining a transmission route for optical signals in an optical signal transmission system comprising a transmitter for optical signals, a receiver for the optical signals, and repeaters for repeating the optical signals transmitted from the transmitt... | 09/02/2008 |
| 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 |
| 7409157 | Optical switch The present invention provides an optical switch in which a switching operation is not affected even when the polarization state of a control light varies. The optical switch includes a loop-form optical waveguide loop circuit formed from an optical nonlinear medium... | 08/05/2008 |
| 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 |
| 7400829 | Transmission apparatus and path selection method of a transmission apparatus A transmission apparatus that receives an optical signal by selecting any one of a plurality of provided optical signal transmission paths through protection control is configured to include a plurality of optical signal outputting sections that output the optical s... | 07/15/2008 |
| 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 |
| 7389043 | Protection architecture for photonic switch using tunable optical filter A method and a protection switching arrangement for protection switching of any one of a plurality of optical signals of a multi-wavelength optical signal from the failure of an optical component is provided. The multi-wavelength optical signal which contains the op... | 06/17/2008 |
| 7379668 | Optical amplification in photonic switched crossconnect systems An improved photonic switch having optical amplification is described. Signals are amplified before they are switched, after they are switched, or both before and after they are switched. The optical amplification compensates for fixed losses within the switch and t... | 05/27/2008 |
| 7369772 | Optical line terminal arrangement, apparatus and methods A wavelength division multiplexed optical communication system including a first optical line interface optically coupled to a first transponder and an optical demultiplexer through which the first optical line interface is not optically coupled to the first transpo... | 05/06/2008 |
| 7369767 | Method of determining a spectral route in an optical telecommunications network In order to determine a spectral route between a departure node (N1) and an arrival node (N6) in a WDM optical telecommunications network, the method comprises a step of determining a spatial route connecting the departure node to the arrival node, sai... | 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 |
| 7366370 | Technique for photonic switching A technique for photonic switching is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for photonic switching. The method may comprise receiving at least one optical signal at a photonic line card, wherein the at least one... | 04/29/2008 |
| 7366417 | Delivering multicast services on a wavelength division multiplexed network using a configurable four-port wavelength selective crossbar switch A method and a system in which selected wavelengths of a wavelength division multiplexed (WDM) signal are modulated with multicast data for multicasting data services on an optical network. The WDM signal is received from a hub node of the optical network, such as a... | 04/29/2008 |
| 7360893 | Systems and methods for shaping wavefronts in polychromatic light using phase shifting elements A system for producing polychromatic light having selectively shaped wavefronts includes a source for generating light beams of at least two wavelengths (λ1, λ2). The beams are made up of a plurality of contiguous sub-beams that establish λ | 04/22/2008 |
| 7362974 | Method for planning or provisioning data transport networks A tool for static or dynamic planning of a WDM network with dedicated protection. The WDM network is represented by a layered graph having image nodes for each node of the network and horizontal arcs for each link of the network, so as to replicate in each layer the... | 04/22/2008 |
| 7359592 | Single fiber links for full duplex aircraft data network A method for creating a full duplex fiber optic network using one single fiber optic cable of the multimode fiber type for simultaneous transmission and reception is described. The method includes the steps of equipping end user devices and switches with bidirection... | 04/15/2008 |
| 7359396 | Optical-core network with selective signal queueing A core network shared by a large number of edge nodes comprises core nodes interconnected by core channels. Selected core channels are provided with buffers to enable temporal alignment of signals arriving at any core node from several other core nodes. A buffer may... | 04/15/2008 |
| 7356259 | Optical bypass upgrade configuration Optical bypass node upgrade configurations are disclosed: (1) a configuration where optical taps are pre-positioned in wavelength division multiplex (WDM) line systems terminating at optical-electrical-optical (OEO) core switching nodes to allow for future upgrade o... | 04/08/2008 |
| 7352966 | Method and apparatus for capacity-efficient restoration in an optical communication system A method and system provide capacity-efficient restoration within an optical fiber communication system. The system includes a plurality of nodes each interconnected by optical fibers. Each optical fiber connection between nodes includes at least three channel group... | 04/01/2008 |
| 7349628 | MMI based device A device and method for multiplexing or demultiplexing M optical signals, each having a different wavelength λm. An MMI waveguide has a length such that each optical signal that propagates into the MMI waveguide at an i:th access waveguide, where i≦N, ... | 03/25/2008 |
| 7343096 | Method and apparatus for in-service upgrading of OADM to wavelength selective switch of higher degree System and methods for upgrading an optical add-drop multiplexer (OADM) to higher degree wavelength selective router (WSR)/wavelength selective switch (WSS) are disclosed. For example, an OADM of degree-2 may be provisioned for upgrades to degree-3 and higher. The e... | 03/11/2008 |
| 7340174 | Programmable OADM with chromatic dispersion, dispersion slope and amplitude ripple compensation, and method A programmable optical add/drop multiplexer (OADM) implements add/drop function of optical signals from a number of cross-connected optical systems while treating issues of coherent cross-talk, chromatic dispersion, slope of dispersion and amplitude equalization. In... | 03/04/2008 |
| 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 |
| 7340557 | Switching method and system for multiple GPU support A system and method for supporting multiple graphics processing units (GPUs) includes a first communication path coupled to a root complex device and a first connection point of a first GPU. A second communication path is coupled to the root complex device and a fir... | 03/04/2008 |
| 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 |
