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| Number | Title | Issue Date |
| 6996820 | Efficient multiple priority list memory system An efficient memory system to implement a multi-list, multi-priority task management scheme. In one embodiment, a single list which is dynamically partitioned among multiple priority levels and effectively implements multiple priority lists. This dynamic re-allocati... | 02/07/2006 |
| 6961522 | Automatic raman gain and tilt control for ultra-long-distance dense WDM optical communication system An approach for automatic Raman gain and tilt control for a WDM (Wavelength Division Multiplexing) optical communication systems is disclosed. An optical fiber carries a plurality of optical signals, in which at least one of the optical signals are reference signals... | 11/01/2005 |
| 6953663 | Polymorphism detection The present invention generally provides a rapid efficient method for analyzing polymorphic or biallelic markers, and arrays for carrying out these analyses. In general, the methods of the present invention employ arrays of oligonucleotide probes that are complement... | 10/11/2005 |
| 6928484 | Method and apparatus for discovering edge-disjoint shortest path pairs during shortest path tree computation A method for identifying and choosing a shortest path segment that has an alternate edge disjoint path segment. While routing Unidirectional Path Switched Ring (UPSR) path segments in a graph, there may be several equal distance paths to choose the shortest path fro... | 08/09/2005 |
| 6919716 | Precision avalanche photodiode current monitor Precision measurement of optical signal power is provided. In one implementation, a Wilson current mirror senses current through an avalanche photodiode (APD) that has been exposed to the optical signal. The output of this APD may also be used to recover data. By in... | 07/19/2005 |
| 6918069 | Optimum threshold for FEC transponders An optical receiver threshold may be optimized in real time based on a forward error correction (FEC) error statistics. A relative number of corrected ones as compared to corrected zeros is tracked. The threshold is shifted in response to an imbalance between the tw... | 07/12/2005 |
| 6917412 | Modular stage with reaction force cancellation Methods and apparatus for providing a stage apparatus which is modular and allows for reaction force cancellation are described. According to one aspect of the present invention, a stage apparatus includes a table assembly and a first stage. The table assembly suppo... | 07/12/2005 |
| 6915472 | Decoding data from multiple sources Systems and methods for sharing a single decoder among data streams originating with multiple sources. Error correction coding techniques are modified to facilitate decoding of data from multiple sources multiplexed in the time domain at the decoder input. A single ... | 07/05/2005 |
| 6907254 | Method and apparatus for controlling a quiet zone for wireless units In an IP-based cellular wireless communication system, systems and methods for spatially controlling cellular phone usage are provided. Entry of a cellular phone device into an area of restricted phone access (“quiet zone”) is detected and an IP message identify... | 06/14/2005 |
| 6903863 | Gain flattened bi-directionally pumped Raman amplifier for WDM transmission systems Raman amplification of a WDM signal with excellent gain flatness across a very large bandwidth is achieved. Co-propagating and counter-propagating Raman pumping are combined in the same fiber. Multiple pumping wavelengths are employed. Wavelengths employed for co-pr... | 06/07/2005 |
| 6888371 | Programmable interface for field programmable gate array cores A programmable interface for FPGA cores embedded in an integrated circuit. The interface has an interconnect multiplexer (which includes demultiplexers) connected to the FPGA core and other elements of the integrated circuit. A control portion of the interface provi... | 05/03/2005 |
| 6876487 | Any-to-any all-optical wavelength converter All-optical wavelength converters based upon difference frequency generation (DFG) in optical chips with periodically poled materials are presented. Tunable continuous wave (CW) laser sources and various arrangements are made with the optical input signals in differ... | 04/05/2005 |
| 6867905 | Reduced four-wave mixing and raman amplification architecture Raman amplifiers with improved signal to noise ratio and four-wave mixing product suppression are provided. In one embodiment, both co-propagating and counter-propagating pump energy are employed to cause Raman amplification effects within a fiber. Improved Raman am... | 03/15/2005 |
| 6865181 | Method and apparatus for routing telecommunications signals The present invention discloses a method and apparatus for cross-connecting high-speed telecommunications signals at a cross-connect apparatus. The cross-connect apparatus can transmit the telecommunications signals from an input interface card to a cross-connect ca... | 03/08/2005 |
| 6862132 | Suppression of double rayleigh backscattering and pump reuse in a raman amplifier Systems and methods for ameliorating double Rayleigh backscattering induced impairments are provided. Raman amplification is divided among two or more stages. Optical energy from a single counter-propagating pump may traverse multiple stages while optical energy at ... | 03/01/2005 |
| 6862130 | Polarization-insensitive integrated wavelength converter A polarization-insensitive integrated wavelength converter system includes polarization-separating, polarization-rotating and wavelength-converter structures integrated into a monolithic optical structure. In one embodiment, a lithium niobate waveguide structure inc... | 03/01/2005 |
| 6857046 | Caching for context switching applications Techniques for implementing caches for context switching applications are provided. A context identifier is stored in the cache to indicate the context to which data in the cache is associated. Additionally, the context can have different priorities so that storage ... | 02/15/2005 |
| 6853756 | Tunable optical waveguide filters with optimized lengths and method of designing same A generalized tunable optical filter with interconnected processing devices, such as unequal arm Mach-Zehnder interferometric devices and ring resonator devices, is described. Each of the processing elements is characterized by a parametric length Δlk=n | 02/08/2005 |
| 6842223 | Enhanced illuminator for use in photolithographic systems Methods and apparatus for enabling both isolated and dense patterns to be accurately patterned onto a wafer are disclosed. According to one aspect of the present invention, an illumination system that is suitable for use as a part of a projection tool includes an il... | 01/11/2005 |
| 6841127 | In-Situ Injection and materials screening device An apparatus for in-situ injection of one or more chemical components into a reaction chamber is disclosed. The apparatus includes a reaction chamber for receiving one or more libraries, each of the libraries comprising two or more samples. The reaction chamber is c... | 01/11/2005 |
| 6841956 | Actuator to correct for off center-of-gravity line of force Methods and apparatus for adjusting a push point of an actuator such that the push point more closely corresponds to a center-of-gravity of a stage being driven by the actuator are disclosed. According to one aspect of the present invention, a method for scanning a ... | 01/11/2005 |
| 6839366 | Laser frequency control using dithered control signal A dithering signal is superimposed on a laser frequency control signal. In this way, laser frequency control may be achieved by employing measurements from a single photodetector. By sampling synchronously to the dithering signal, it is possible to generate both the... | 01/04/2005 |
| 6838052 | In-situ injection and materials screening device An apparatus for in-situ injection of one or more chemical components into a reaction chamber, comprising a reaction chamber for receiving one or more libraries including two or more samples; an injection module in fluid communication with the reaction chamber for p... | 01/04/2005 |
| 6836519 | Automatic digital scaling for digital communication systems Improved receiver automatic gain control for OFDM-based communication systems is provided, thus realizing the full potential of OFDM systems to handle rapid variation in channel characteristics. The improved automatic gain control technique can also accommodate rece... | 12/28/2004 |
| 6834139 | Link discovery and verification procedure using loopback Systems and methods for link discovery and verification technique that minimize the need for line termination resources that generate and interpret packets. Of two nodes verifying a link to one another, only one node need have any line termination capability. The no... | 12/21/2004 |
| 6834137 | Cholesteric liquid crystal cell devices and systems Cholesteric liquid crystal cell units are used for reflecting or transmitting incident light responsive to control signals. A cholesteric liquid crystal cell unit has a first cholesteric liquid crystal cell and a second cholesteric liquid crystal cell. The second ch... | 12/21/2004 |
| 6834240 | Software for the display of chromatographic separation data Techniques for displaying chromatographic data using a graphical user interface are provided. Chromatographic separation data that is a series of measurements for a sample at a scanning location over time can be displayed on a display device in a series of bands. Ad... | 12/21/2004 |
| 6831865 | Maintaining erase counts in non-volatile storage systems Methods and apparatus for storing erase counts in a non-volatile memory of a non-volatile memory system are disclosed. According to one aspect of the present invention, a data structure in a non-volatile memory includes a first indicator that provides an indication ... | 12/14/2004 |
| 6816546 | MAC protocol employing multiple data rates Method and apparatus for combining high data rate traffic and low data rate traffic on a common transmission medium while maximizing efficient use of available spectrum. Since spectrum is an economically valuable resource and transport of data generates revenue, the... | 11/09/2004 |
| 6809323 | Isolated frame caster Methods and apparatus for reducing the transmission of vibrations within a caster system that supports a stage apparatus with a reaction frame are disclosed. According to one aspect of the present invention, a caster system that support portions of a stage apparatus... | 10/26/2004 |
| 6804761 | Memory allocation system and method A method of allocating computer memory for a function in a computer program by a chunk manager operable to interface with an operating system of a computer program. The method includes receiving a request for a block of memory for a function in the computer program.... | 10/12/2004 |
| 6804463 | Connection verification for all-optical cross-connects by signal cross-correlation Systems and methods for reliable and low cost optical connection verification. One application is verification and monitoring of optical cross-connect performance. A connection is verified by splitting off optical signals at both ports of the connection, converting ... | 10/12/2004 |
| 6801355 | Optical signal converter with filtered output A WDM signal converter is provided. The signal converter is formed from a DFG and a separator, such as a WDM interleaver multiplexer/demultiplexer. The DFG receives first WDM channel signal(s) and converts into second WDM channel signal(s). The pump signal which ene... | 10/05/2004 |
| 6801183 | Temperature compensation for liquid crystal cell optical devices A temperature compensation circuit arrangement for liquid crystal cells in optical devices is presented. In an optical device, a liquid crystal cell typically manipulates the optical signals according to an output optical property, such as attenuation, responsive to... | 10/05/2004 |
| 6801052 | Field programmable gate array core cell with efficient logic packing A Field Programmable Gate Array (FPGA) core cell with one or more Look-Up Tables (LUTs) and a selectable logic gate is presented as a space-efficient alternative to the conventional LUT-based FPGA core cell. An algorithm based upon the familiar FlowMap algorithm for... | 10/05/2004 |
| 6799253 | Stochastic scratchpad storage management technique Methods and apparatus for dynamically allocating space within virtual memory at run-time while substantially minimizing an associated path length are disclosed. According to one aspect of the present invention, a method for allocating virtual storage associated with... | 09/28/2004 |
| 6795426 | Realtime power control in OFDM systems Systems and methods for efficiently transmitting power level information in a point to multipoint wireless system. Multiple subscriber units may transmit indications of their power level within a shared burst where one or more subchannels are allocated to each subsc... | 09/21/2004 |
| 6795242 | Miniature circulator devices and methods for making the same Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device includes two refraction elements arranged opposite each other along a propagation axis and coupled on opposite ends to first an... | 09/21/2004 |
| 6788950 | Optimal use of request access TDMA slots for automatic level control Systems and methods for controlling subscriber unit power level using power measurements made on access request transmissions. Since a subscriber unit access request typically precedes a subscriber unit data transmission by a relatively short period of time, the dat... | 09/07/2004 |
| 6785431 | Miniature circulator array devices and methods for making the same Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device according to the present invention includes a spatial walkoff plate (SWP) coupled on opposite ends to first and second polariza... | 08/31/2004 |
