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President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 7440702 | Method for transmitting digital image signal, digital image transmitting device, digital image sending device and digital image receiver A multiplexer of a transmission section generates a clock signal by multiplying a reference clock signal of a digital image signal by a predetermined number ‘K’. A parallel digital image signal is converted into a serial digital signal on the basis of the clock ... | 10/21/2008 |
| 7418208 | Optoelectronic transceiver for a bidirectional optical signal transmission An optoelectronic transceiver for a bidirectional optical signal transmission including a housing having a width of at most 13.5 mm, a first bidirectional optical subassembly arranged in the housing and serving for the simultaneous emission and reception of optical ... | 08/26/2008 |
| 7394771 | Apparatus and method for data communication including establishing communication using tone signal In optical two-way communication using a single optical fiber, part of the light transmitted from an apparatus is received as stray light by the apparatus itself. This occasionally hampers accurate detection of disconnection from the partner apparatus and of the sta... | 07/01/2008 |
| 7394986 | Flat top optical filtering component The invention relates to wavelength-selective optical filters for allowing light of a narrow optical spectral band, centered around a wavelength (λc) to pass through them, while reflecting the wavelengths lying outside this band. According to the inventi... | 07/01/2008 |
| 7363367 | Systems and methods for robust, real-time measurement of network performance Methods and apparatuses for obtaining delay, jitter, and loss statistics of a path between server and an end user coupled via an internetwork are described. The server may comprise a web server in communication with the end user via the Internet. Statistics are obta... | 04/22/2008 |
| 7359635 | Optically-controlled optical network and switching node therefor The optically-switched optical network comprises information signal channels allocated for optically transmitting one or more information signals; routing signal channels allocated for optically transmitting routing signals in parallel with the information signals; ... | 04/15/2008 |
| 7359640 | Optical coupling device and method for bidirectional data communication over a common signal line Optical coupling device operates over a bidirectional data link between at least first and second communicators, each communicating data along a common wire of the data link. The device includes at least first and second optical couplers, each including a photon flu... | 04/15/2008 |
| 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 |
| 7356220 | Apparatus and method for reducing signal noise and OCDMA receiver and method Provided are an apparatus and a method for reducing a signal noise of an OCDMA receiver and an OCDMA receiver and method. The includes: a clock recovery unit extracting sine wave clock from an output signal of an OCDMA decoder including an MAI (multiple access inter... | 04/08/2008 |
| 7349994 | Method and apparatus for coordinating routing parameters via a back-channel communication medium Systems and methods are described for enabling routers to coordinate via a back-channel communication medium. The information exchanged over the back-channel is used to increase the number of paths considered for the routers during route optimization. The Decision M... | 03/25/2008 |
| 7346280 | Bi-directional long haul/ultra long haul optical communication link A bi-directional configuration is employed to implement a hybrid ultra long haul (ULH)/long haul (LH) optical transmission system. The link carries ULH channels and LH channels in opposite directions in different bands. Raman amplification is employed for the ULH ba... | 03/18/2008 |
| 7336613 | Method and apparatus for the assessment and optimization of network traffic A system for the assessment of network performance criteria, and applying this criteria to the classification of network addresses into appropriate ranges, using these ranges to consolidate performance measurements for the associated addresses, and applying these me... | 02/26/2008 |
| 7333726 | Method and system for supporting multiple service providers within a single optical network Analog video signals are communicated from multiple service providers to subscribers by using analog optical carriers. Unlike digital optical carriers that typically support data services or IP TV, analog optical carriers that can be demodulated or translated back i... | 02/19/2008 |
| 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 |
| 7327914 | Adaptive optical signal processing with multimode waveguides Optical signals are passed in an optical medium using an approach that facilitates the mitigation of interference. According to an example embodiment, a filtering-type approach is used with an optical signal conveyed in an optical fiber, such as a multimode fiber (M... | 02/05/2008 |
| 7315673 | Optical multiplexer/demultiplexer and method of manufacturing the same An optical multiplexer/demultiplexer is provided, which is easy to assemble and which can be manufactured with high productivity and a low cost. An optical multiplexer/demultiplxer includes a substrate formed with V-shaped grooves, optical fibers with a lens provide... | 01/01/2008 |
| 7292747 | Strictly non-blocking switch core having optimized switching architecture based on reciprocity conditions A switch core is set forth that comprises a plurality of duplex switches that are interconnected with a interconnection fabric to implement, for example, strictly non-blocking operation of the switch core for reciprocal traffic. In one embodiment, an N-way reciproca... | 11/06/2007 |
| 7286767 | Optical transceiver over single communication link A method, apparatus, and system for optical communications. An optical transmit signal is generated in response to an electrical transmit signal. The optical transmit signal is coupled into a single communication link for transmission there over. An optical receive ... | 10/23/2007 |
| 7280483 | System and method to improve the network performance of a wireless communications network by finding an optimal route between a source and a destination A system and method for calculating an optimal route at a node by making use of routing metrics which if carefully chosen, can provide stability to the network and also provide features like Self Healing and Load Balancing. A Routing metric is calculated as a scalar... | 10/09/2007 |
| 7269349 | Method of and device for performing bi-directional transmission using a single-wire Two signal lights having different wavelengths are bidirectionally transmitted on an optical-fiber transmission-line. A Raman pump light source generates a first Raman pump light having predetermined wavelengths with a Raman gain-bandwidth for amplifying the first s... | 09/11/2007 |
| 7254331 | System and method for multiple bit optical data transmission in memory systems The disclosed system and method data increases data transmission speed through a memory system by using optical signals comprising a plurality of wavelengths of light so that each pulse of optical signals can represent more than a single bit of data. An optical tran... | 08/07/2007 |
| 7242860 | Optical protection switching using 2 by 2 switching functions A network is protected against interruption of service while one or more faulty switches or optical fiber transmission lines are repaired or replaced, by an interconnecting configuration of small N×N optical input/output switches, where N is 2 or greater than 2. Th... | 07/10/2007 |
| 7224861 | Strictly non-blocking switch core having optimized switching architecture based on reciprocity conditions A switch core is set forth that comprises a plurality of duplex switches that are interconnected with a interconnection fabric to implement, for example, strictly non-blocking operation of the switch core for reciprocal traffic. In one embodiment, an N-way reciproca... | 05/29/2007 |
| 7218852 | System and method for optical light path discovery A system and method for discovering lightpath information in an optical network is disclosed. A selected node is requested to provide lightpath information. The node, in turn, requests the other node of the optical network to provide channel attribute data. The node... | 05/15/2007 |
| 7215843 | Optical switching apparatus and optical switching method An optical switching apparatus includes an optical switch having a plurality of input ports and output ports, optical amplifiers, monitor circuits, optical amplifiers monitor circuits, and a controller that controls the optical switch. The optical amplifiers are con... | 05/08/2007 |
| 7212747 | Optical transmission device and optical transmission method for transmitting a burst radio signal A light emitting section outputs an optical signal having an intensity corresponding to a transmission timing signal, the optical signal modulated based on a radio transmission signal. A received photocurrent detection section detects an intensity of an optical sign... | 05/01/2007 |
| 7212745 | Optical transmission system In an optical transmission system, a lens converges an optical signal outputted from a light emission element. The optical signal having passed .through the lens enters a multi-mode fiber (MMF). A vertex of the lens and an input plane of the MMF are at a distance. T... | 05/01/2007 |
| 7200335 | Optical transceiver An optical transceiver is equipped with at least one coupling lens which condenses reception signal light from an optical medium and condenses transmission signal light to the optical medium, an optical plate which passes the reception signal light and reflects the ... | 04/03/2007 |
| 7184621 | Multi-wavelength transmitter optical sub assembly with integrated multiplexer A four-channel multi-wavelength transmitter optical sub assembly (TOSA) with an integrated multiplexer is described that includes four lasers, four collimating lenses, a multiplexer, an isolator, a focusing lens, and an optical fiber. The integrated multiplexer comp... | 02/27/2007 |
| 7171081 | Plug-in coupler to convert the transceiver (transmitter/receiver, tx/rx) transmission into a bi-directional fiber A bi-directional light signal separation device that separates light signals into the component incoming and outgoing light signals has a a female connector that is connected to a near end of a first fiber optic cable conveying the bi-directional light signal. A lig... | 01/30/2007 |
| 7160032 | Electro-optical composite connector, electro-optical composite cable, and network devices using the same The electro-optical composite connector comprises an electro-optical composite plug and an electro-optical receptacle. The electro-optical composite plug or electro-optical composite receptacle converts an optical signal from an optical fiber to an electric signal a... | 01/09/2007 |
| 7149975 | Optical network administration graphical user interface This invention provides an improved graphical user interface (GUI) for optical network administration. The GUI allows a user to view a network topology in which only those nodes at which channel traffic may be added to and/or dropped from a muxed signal are displaye... | 12/12/2006 |
| 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 |
| 7130502 | Wavelength division multiplexing optical coupler A wavelength division multiplexing optical coupler comprising an input optical fiber for a plurality of wavelengths; a lens for converting the light from the input optical fiber into a parallel light; a first optical filter group comprising optical filters aligned a... | 10/31/2006 |
| 7120357 | WDM device, client device, network, system and method for allocating wavelength of WDM to a client signal A WDM (Wavelength Divisional Multiplex) device is provided in which a client signal having a band that is greater than a band of a wavelength used for wavelength-division multiplexing is allocated a plurality of wavelengths and is transmitted as a wavelength-divisio... | 10/10/2006 |
| 7113698 | Fault detection and isolation in an optical network A system for detecting faults in an optical network having switching nodes and amplifier nodes is provided. According to one aspect of the system, one or more amplifier nodes are coupled between two switching nodes. Each amplifier node is capable of detecting a faul... | 09/26/2006 |
| 7110672 | Optical transmission system for frequency-multiplexed signal A detector outputs a detection signal indicating amplitude variation of an input frequency-multiplexed signal. An amplitude controller adjusts the amplitude of the frequency-multiplexed signal by referring to the detection signal. A modulator modulates the amplitude... | 09/19/2006 |
| 7099593 | Self-synchronization of an optical packet network using seed pulses extracted from within the packets A method and system for self-synchronizing an optical packet network by selecting a seed pulse from among the data pulses within a packet having no synchronization marker, transforming the seed pulse to be optically distinguishable from the remaining data pulses aft... | 08/29/2006 |
| 7096176 | Optical route design system and method for analyzing the performance of an optical fiber transmission path An optical route design system and method are described that can effectively calculate and display for a user how much margin there is in a design of an optical span. Basically, the optical route design system has a processor capable of determining whether a design ... | 08/22/2006 |
| 7095956 | Method and apparatus for validating a path through a switched optical network A method for validating a path through a switched optical network is disclosed. A bit error rate at the end of the path is determined. The path is validated if the bit error rate is within a predefined range. ... | 08/22/2006 |
