Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 8190022 | Optical transmission apparatus An optical transmission apparatus includes a network, a plurality of transponders, a monitor, a multiplexer, and demultiplexer. The plurality of transponders connected with the network, each of the plurality of transponders having a response transfer processing unit... | 05/29/2012 |
| 8184970 | Optical transceiver with LED link information indicator Exemplary embodiments of the invention relate to an analyzer device configured to interface with an optical transceiver module having a diagnostic communications port, wherein the port is configured to access diagnostic and other data contained within the transceive... | 05/22/2012 |
| 8121475 | Optical signal quality monitor for a high-bit rate signal An optical signal quality monitor includes a splitter splitting an input optical signal into two signals; a low-frequency converter converting one split optical signal to a low frequency signal by modulating the optical signal with a frequency offset signal; and an ... | 02/21/2012 |
| 8111985 | Apparatus and method for performing line analysis of continuous data signals An apparatus for performing an optical line analysis of continuous data signals. The apparatus comprise a phase position processor for computing a phase early/late indicator; a phase control code processor for computing a difference phase indicator; a frequency extr... | 02/07/2012 |
| 8032020 | Self calibrated optical spectrum monitor An optical spectrum monitor includes a tunable optical detector that receives optical channel monitoring signals from an optical channel and receives a control signal that selects a frequency of an optical channel monitoring signal for detection. The tunable optical... | 10/04/2011 |
| 8027583 | Wavelength division multiplexed systems with optical performance monitors The specification describes optical performance monitors which are simplified by coupling single tunable optical filters to multiple channels being monitored. Optical measurements for more than one channel may be made simultaneously. The optical system architecture ... | 09/27/2011 |
| 7995915 | Method and apparatus for testing transmission lines normally propagating optical signals Portable apparatus for measuring parameters of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if i... | 08/09/2011 |
| 7889988 | Optical transmission apparatus An optical transmission apparatus to which an optical module having optical module information stored therein is attachable, the optical module information being manufacturing information about the optical module, includes a certification rank table configured to a ... | 02/15/2011 |
| 7877009 | Method and system for electrochemical impedance spectroscopy A method and system of measuring the spectroscopic impedance of a sensor and its immediate surroundings. The sensor is disposed on an engineered structure and is coated with a protective coating. The method includes providing a first optical signal having a first mo... | 01/25/2011 |
| 7869707 | Measuring system comprising an intelligent sensor head and having a reduced power consumption for medium-voltage or high-voltage systems or in mining, and method therefor Differently designed measuring systems exist of which most contain a central signal processing unit and a number of electrical measuring components, and in which the measured values furnished by the measuring components are optically transmitted over optical wave gu... | 01/11/2011 |
| 7844178 | Local area warning of optical fiber intrusion Disclosed is a method and apparatus which provides for alerting of potential fiber optic cable intrusion. A stress detector located at a fiber optic cable termination point detects stress on the fiber optic cable and generates an alarm signal in response to the stre... | 11/30/2010 |
| 7805074 | Package starting control device The invention relates to a package starting control device determining a moment and a sequence of starting a package corresponding to an individual wavelength to be wavelength-division-multiplexed in a wavelength division multiplex transmission device. An object of ... | 09/28/2010 |
| 7801443 | Automatic circulation collection type data collecting system An automatic circulation collection type data system is constructed by connecting a monitoring device and data collecting modules disposed at respective places through optical cables. The monitoring device transmits a trigger pulse for data collection through the op... | 09/21/2010 |
| 7734172 | Router having dual propagation paths for packets A router comprising an interface module (IM), having an optical path and an electrical path and a speed sensor coupled between an input of the router and an input of the IM. The speed sensor is adapted to receive a packet and detect a speed of the IM connection and ... | 06/08/2010 |
| 7711264 | Local area warning of optical fiber intrusion Disclosed is a method and apparatus which provides for alerting of potential fiber optic cable intrusion. A stress detector located at a fiber optic cable termination point detects stress on the fiber optic cable and generates an alarm signal in response to the stre... | 05/04/2010 |
| 7650070 | Self-testing optical transceiver controller using internalized loopbacks An operational optical transceiver microcontroller configured to initiate a self-test using internalized loop backs. The microcontroller includes a memory, at least one processor and a number of input and output terminals. The output terminals are coupled to interna... | 01/19/2010 |
| 7440700 | Apparatus for testing performance of optical transceiver Provided is an apparatus for testing the performance of an optical transceiver by referencing various performance clocks provided by an OTU2 signal connection transceiver and an STM-64/OC-192 signal. The apparatus for testing performance of an optical transceiver in... | 10/21/2008 |
| 7418203 | Diagnosis method for standby system of optical ring network An object of the invention is to provide a diagnosis method for standby systems in an optical ring network having a redundant configuration, which can confirm normal states of standby systems in all optical transmission apparatuses on the network, even during operat... | 08/26/2008 |
| 7414386 | Methods for testing optical transmitter components Methods for testing optical components, such as laser diodes or light emitting diodes, that are manufactured for use in optical transmitters or transceivers. The testing methods are performed using a true RMS conversion circuit in a test apparatus. The testing metho... | 08/19/2008 |
| 7415536 | Address query response method, program, and apparatus, and address notification method, program, and apparatus Upon reception of a query about the address of a server from a client, a DNS server sends a query about the address of that server to an external DNS server. The DNS server checks based on the address obtained from the external DNS server if connection to the server... | 08/19/2008 |
| 7406260 | Method and system for network wide fault isolation in an optical network A method and system for network wide fault isolation in an optical network are described. A single fault in a network can produce a large number of alarms at different points in an optical network. The described method and system identify the root cause alarm while ... | 07/29/2008 |
| 7373087 | Adaptive optical transponder Systems and methods for optical communications. In one implementation, a communications device is provided. The communications device includes an Optical domain Adaptive Dispersion Compensation Module (OADCM); an Electrical domain Adaptive Distortion Compensation Mo... | 05/13/2008 |
| 7373090 | Modulator driver circuit with selectable on-chip termination A method and apparatus to accommodate differing output loads without sacrificing impedance matching in an optical modulator driver. ... | 05/13/2008 |
| 7369764 | Transmission line monitoring method and apparatus A transmission line monitoring apparatus includes a first optical coupling unit, a first optical dividing unit, a second optical coupling unit, a second optical dividing unit and a monitoring unit. The first optical coupling unit couples a down data signal with a fi... | 05/06/2008 |
| 7366244 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 04/29/2008 |
| 7366426 | Optical add/drop multiplexer using tunable filter and method for feedback controlling the tunable filter A wavelength stabilizing filter has a wavelength transmission characteristic curve that has its peak in a wavelength located between a first continuous set band and a second continuous set band longer in wavelength than the first set band, and that linearly drops fr... | 04/29/2008 |
| 7366209 | Orthogonal polarization multiplexing transmission apparatus and multiplexing method used for the same An orthogonal polarization multiplexing transmission apparatus capable of performing dispersion compensation considering a short wavelength side and a long wavelength side of a zero dispersion wavelength. A plurality of light signals of different wavelengths are div... | 04/29/2008 |
| 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 |
| 7362930 | Reduction of MEMS mirror edge diffraction in a wavelength selective switch using servo-based rotation about multiple non-orthogonal axes Effects of diffraction of a spectral beam from an edge of the micromirrors are reduced in order to optimize the passband in a wavelength selective switch. The effects of diffraction on the pass band may be reduced by using rotation of the micromirror about both the ... | 04/22/2008 |
| 7359384 | Scheduling of guaranteed-bandwidth low-jitter traffic in input-buffered switches A switch schedules guaranteed-bandwidth, low-jitter-traffic characterized by a guaranteed rate table (GRT) method. A rate matrix generated from collected provisioning information is decomposed into schedule tables by a low jitter (LJ) decomposition method. The LJ de... | 04/15/2008 |
| 7359634 | Light color recognition for optical connection verification Optical connection verification schemes that do not cause electromagnetic interference. An all-optical connection verification scheme exploits optical coding based on a standard color scale such as RGB (red, green, blue). An RGB LED source is used to launch a three-... | 04/15/2008 |
| 7359637 | Self-healing passive optical network A self-healing passive optical network is disclosed. The network includes a central office and a remote node connected to the central office through a main optical fiber. The remote node transmits one portion of power of the upstream optical signal, which has been i... | 04/15/2008 |
| 7355984 | Method and system for finding network neighbor information A method and system for discovering peer node information at a path terminating equipment node in a computer network are disclosed. The method generally includes transmitting from an originating node to a peer node a request for information in at least one SONET pat... | 04/08/2008 |
| 7355985 | Automatic update of squelch tables for optical network applications A method and system for processing a squelch table for optical network applications. The method includes receiving a first cross-connection entry associated with a first cross-connection and a first channel, and generating a first squelch entry associated with the f... | 04/08/2008 |
| 7352824 | Multilevel pulse position modulation for efficient fiber optic communication Decreasing the average transmitted power in an optical fiber communication channel using multilevel amplitude modulation in conjunction with Pulse Position Modulation (PPM). This multilevel PPM method does not entail any tradeoff between decreased power per channel ... | 04/01/2008 |
| 7352927 | Optical add-drop multiplexer architecture with reduced effect of mirror edge diffraction Effects of diffraction of a spectral beam from an edge of the micromirrors are reduced in order to optimize the passband in a wavelength selective switch. The effects of diffraction on the pass band may be reduced by appropriate modification of the edges of the micr... | 04/01/2008 |
| 7348541 | Optical channel monitoring system with simultaneous C-band and L-band detection A monitoring system has the capability to monitor multiple signal bands simultaneously. Specifically, in one embodiment, the monitoring system can simultaneously monitor the C- and L-bands. As a result, the time to scan through the spectral band can be reduced by ha... | 03/25/2008 |
| 7343066 | Reconfigurable optical add/drop multiplexer A reconfigurable optical add/drop multiplexer (ROADM) includes a first optical dynamic gain equalization filter (DGEF) having a first input for receiving an initial wavelength division multiplexed (WDM) signal, a first output for sending a phase shifted WDM signal, ... | 03/11/2008 |
| 7343102 | Optical transmission system with automatic signal level adjustment and startup functions An optical transmission system with automatic startup functions to optimize the power level of optical signals entering each optical amplifier and operate those amplifiers in appropriate mode. In the process of starting up an optical transmission system, upstream an... | 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 |
