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| Number | Title | Issue Date |
| 7512291 | Fiber bragg crating sensor interrogation method The invention discloses multi-channel fiber Bragg grating (FBG) interrogation systems and manufacture thereof. The multi-channel fiber Bragg-grating sensor interrogation unit comprises at least one integrated optic sensor microchip and a signal processing IC-electro... | 03/31/2009 |
| 7058101 | Stepped manifold array of microchannel heat sinks An assembly for providing a concentrated, vertically stacked array of laser beams from a horizontally offset array of electrically serially-connected metallic microchannel heat sinks each bearing a laser diode bar. The heat sinks are mounted on horizontally offset p... | 06/06/2006 |
| 6995891 | Electrochromic safety glazing An electrochromic device is achieved that exhibits the characteristics of impact-resistant safety glass by starting with a solid electrolyte sheet material and a peripheral sealant material sandwiched between substrates to heat and pressure such that the electrolyte... | 02/07/2006 |
| 6936103 | Low indium content quantum well structures A method of suppression of Indium carry-over in the MOCVD growth of thin InGaAsP quantum wells, with low Indium content, on top of thick GaInAsP, with high Indium content. These quantum wells are essential in the stimulated emission of 808 to 880 nm phosphorous-base... | 08/30/2005 |
| 6927058 | Telltale sanitary gasket A gasket for use with sanitary piping systems contains a receptacle for retaining an encapsulated bacterial test indicator. The receptacle has a length that permits the indicator end of the test indicator to be directly exposed to the sterilizing steam that is intro... | 08/09/2005 |
| 6914979 | Tone detection A DFT is used to compute the magnitude and phase of the frequencies desired to be detected in a frame of sampled data by performing 2 dot products for each such frequency. The two dot products are calculated using the samples in the frame and an equal number of equa... | 07/05/2005 |
| 6895027 | CTE compensation of semiconductor laser bars A laser bar is soldered to a conventional microchannel copper heat sink whose coefficient of thermal expansion (CTE) is locally modified in the area where the laser bar is soldered to better match the CTE of the laser bar. A strip of ceramic material having a CTE lo... | 05/17/2005 |
| 6885793 | Cleaving laser diode bars having gratings A wafer that is cleaved to provide a facet for a Fabry-Perot cavity is provided with Bragg gratings whose axes are offset by a small angle from the axis of the Fabry Perot cavity to offset the effect of the randomly uncontrollable location of the cleaved facet on th... | 04/26/2005 |
| 6875467 | Crack resistant sol-gel wafer coatings for integrated optics A method of preparing a multi-layer, crack resistant sol-gel glass derived coating on a substrate by removing the outer periphery of each layer before curing the layer and depositing any succeeding layer. ... | 04/05/2005 |
| 6857638 | Gasket for sanitary fittings A gasket for establishing a seal between the flanges of sanitary pipe fittings having a lumen of pre-determined diameter which comprises an O-ring portion of elastomeric material and an incompressible ring member bonded to said O-ring portion, said ring member havin... | 02/22/2005 |
| 6829442 | High speed optical receiver A high speed optical receiver comprises, in combination, a non-imaging light gathering device for directing light from its entrance pupil to its exit pupil according to the edge ray principle and a photonic detector coupled to the exit pupil and having an anti-refle... | 12/07/2004 |
| 6799899 | Fiber bundle alignment A fiber optic clamp assembly for use with an ultra-precision translation stage to precisely align a fiber optical bundle with a laser diode mounted in a sealable enclosure, comprising a housing for receiving the fiber bundle, a flexible seal positionable between sai... | 10/05/2004 |
| 6770499 | Method of making DBR grating A DBR grating may be created in the cladding of a wafer by defining a non-gain window area, advantageously at the end of the wafer. The non-gain area may be defined either by removing all layers above the cladding layer at the window portion or, preferably, by halti... | 08/03/2004 |
| 6768753 | Reliable diode laser stack A laser diode stack includes a serially connected plurality of laser diode bars mounted on heat sinks. Connected in parallel with each laser diode is a respective safety diode which has a higher band gap than its associated laser diode. The safety diode remains nonc... | 07/27/2004 |
| 6766021 | Echo canceller A method of echo cancellation for a signal transmission system in which the size of the step used to adapt filter coefficients is adjusted in accordance with the echo delay and in which stationary signals are avoided by determining when the mean and variance of coef... | 07/20/2004 |
| 6750538 | Heat transfer of solid-state devices In order to provide an improved heat transfer interface between an solid state device and a heat sink to which it is soldered, one or more “vents” are provided in the interface between the solid state device and the heat sink to prevent the entrapment of gases t... | 06/15/2004 |
| 6702638 | Shatterproofing of fluorescent lamps A method of shatterproofing a fluorescent lamp having a glass envelope by extruding a polymeric coating over the lamp envelope so that it intimately embraces substantially all of the external contours of the lamp, including its glass envelope and end-ferr... | 03/09/2004 |
| 6696311 | Increasing the yield of precise wavelength lasers A wafer supporting a semiconductor structure having a material gain function that would preferentially support an Fabry-Perot laser mode at an unwanted wavelength λ2 is provided with a second-order dielectric grating located sufficiently remotely from th... | 02/24/2004 |
| 6643316 | High power surface-emitting distributed feedback laser A surface-emitting distributed feedback (SEDFB) laser is provided with a "fan-shaped" grating comprising a group of generally straight lines radiating from a central point that is away from the center of the gain. Such a grating provides better stability ... | 11/04/2003 |
| 6639708 | Electrochromic safety glazing An electrochromic device is achieved that exhibits the characteristics of impact-resistant safety glass by subjecting a solid electrolyte sheet material and a peripheral sealant material sandwiched between substrates to heat and pressure such that the ele... | 10/28/2003 |
| 6633599 | Erbium-doped fiber amplifier pump array A multimode source, such as a high-power laser diode bar, to pump an Nd3+ doped region defined in a cavity of a monolithic crystal structure. The axial length L1 of the doped region is chosen to optimize energy absorption from the multimode sou... | 10/14/2003 |
| 6600605 | Diode beam transformation A prismatic device for reforming the cross section of the beam emitted along a semiconductor laser bar stripe by deflecting successive segments of the emitted beam in directions making acute angles with the longitudinal axis of the emitted beam and redire... | 07/29/2003 |
| 6587496 | Single-mode pump power source The mode and wavelength of a conventional, multi-mode, wide-stripe laser diode is converted in an Nd3+ ion-doped laser host crystal to a stable, single-mode output that falls within the spectral region required for pumping EDFA amplifying struc... | 07/01/2003 |
| 6563616 | Optical demultiplexer A compact wavelength division demultiplexer device comprises two cascaded interferometers the wedge angle of whose mirrors are orthogonal to each other, i.e., the two interferometers are oriented such that the dispersion of light with wavelength from the ... | 05/13/2003 |
| 6516116 | High speed optical receiver A high speed optical receiver comprises a photonic detector having an active aperture area dimensioned to minimize capacitance effects commensurate with achieving the desired signaling speed, and a compound parabolic reflector having a surface contour des... | 02/04/2003 |
| 6516011 | Focusing multiple laser beams A stack of parallel but laterally separated laser beams emitted from a pair of laterally separated laser diode bars are focused into a single vertical plane through the use of an interleaved array of stacked, angular glass plates. Successive plates opposi... | 02/04/2003 |
| 6493148 | Increasing laser beam power density A group of diode lasers emitting beams at a first wavelength is positioned above and below a stack of laser diodes emitting beams at a second wavelength. The first wavelength beams are directed to a dichroic portion of a compound prism and are reflected o... | 12/10/2002 |
| 6455341 | Increasing the yield of precise wavelength lasers A wafer supporting a semiconductor structure having a material gain function that would preferentially support an F-P laser mode at an unwanted wavelength λ2 is provided with a second order dielectric grating located sufficiently remotely from the high i... | 09/24/2002 |
| 6452325 | Shatterproofing of fluorescent lamps A compact and portable docking station for a radio mobile personal digital assistant (PDA) carries a magnetic card reader and provides an interface that supplies drive power to the magnetic card reader independently of the PDA battery and translates signa... | 09/17/2002 |
| 6393173 | 2×2 integrated optical cross-connect An optical circulator is connected to each end of an integrated circuit chip containing a pair of multiplexer/demuliplexers driving respective arrays of 2×2 MZIs separated by a striped mirror interface and a plate having a thickness of 1/4 the central wa... | 05/21/2002 |
| 6385373 | Compensated cascaded waveguides When two star couplers are cascaded so as to perform two Fourier transformations without phase distortions, an imaging arrangement results which accurately reproduces at the output the input distribution. In order to achieve high efficiency of power trans... | 05/07/2002 |
| 6373618 | Chromogenic glazing for automobiles and display filters A transparent chromogenic panel in which color changes are selectively effectable over predefined areas comprises a pair of facing glass substrates each covered with a conductive layer divided into individual energizeable areas each provided with as set o... | 04/16/2002 |
| 6356593 | Data optimized codec Quantization noise, introduced into data transmission when analog signals are translated into PCM code using the logarithmic conversion of μ-law or A-law rules necessary to accommodate the transmission of voice signals, limits the maximum attainable spee... | 03/12/2002 |
| 6342804 | Low-noise mixer A four-quadrant mixer is disclosed which has a low noise factor. The indeterminate common-mode voltage that may accompany the modulating signal is suppressed and replaced by a common-mode quiescent voltage designed to establish a predetermined quiescent b... | 01/29/2002 |
| 6331996 | Channel synchronization and impulse sounding in the presence of frequency offset A known training sequence of binary, pseudo random signals, PN, is received over the channel and correlated with a modified pseudo random sequence PN-1 in which the zeros of the known sequence PN have been mapped to -1. A transform of the corre... | 12/18/2001 |
| 6330696 | Self-testing of DRAMs for multiple faults DRAM memory unit is tested for a series of cell faults such as: the stuck-at fault (SAF), the stuck-open fault (SOF), the transition fault (TF), the multiple address fault (MAF) as well as storage capacitor leakage, subthreshold leakage or junction leakag... | 12/11/2001 |
| 6317494 | Line-compensating codec A codec which normally provides impedance synthesis, filtering, suppression of receive signal echoes, and gain equalization for a plurality of line circuits under the control of a microprocessor includes an arrangement for ascertaining the actual impedanc... | 11/13/2001 |
| 6314162 | Digital telephone link margin verification A line circuit for serving a digital telephone set over a link of indeterminate length and attenuation characteristics includes a processor for issuing test messages over the link to the telephone set and which responds to the receipt of an acknowledgment... | 11/06/2001 |
| 6304380 | Reducing polarization dependency of optical apparatus Polarization dependencies exhibited by components of optical apparatus, such as equalizers having chromatically variable transmissivity, are reduced by splitting the incoming light stream to be equalized into two orthogonally polarized streams which are a... | 10/16/2001 |
| 6282804 | Continuous monitoring inclination sensor A arcuate resistive sensor element is imprinted upon a ceramic substrate forming a wall of a ceramic body in which an electrolyte, advantageously silver nitrate dissolved in a mixture of methanol, water and butanol, is sealed. To avoid the effects of elec... | 09/04/2001 |
