Houtsma
Vincent Houtsma, New Providence, NJ US
Patent application number | Description | Published |
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20100254651 | OPTOELECTRONIC RECEIVER - An optoelectronic receiver and associated method of operation. | 10-07-2010 |
20120237153 | MONOLITHIC PHOTONIC INTEGRATED CIRCUIT - An optical device includes a waveguide slab, first and second input port couplers, and first and second output port couplers located over a planar optical substrate. The waveguide slab has a plane of symmetry. The first and second input port couplers extend from the waveguide slab and have an input coupler pair axis located about midway between the first and second input port couplers. The input coupler pair axis is offset at a nonzero first distance from the plane of symmetry. The first and second output port couplers extend from the waveguide slab and have an output coupler pair axis located about midway between the first and second output port couplers. The output coupler pair axis is offset at a different nonzero second distance from the plane of symmetry. | 09-20-2012 |
Vincent E. Houtsma, New Providence, NJ US
Patent application number | Description | Published |
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20120288286 | OPTICAL RECEIVER FOR AMPLITUDE-MODULATED SIGNALS - An optical receiver that uses a coherent optical quadrature-detection scheme to demodulate an amplitude-modulated optical input signal in a manner that enables the use of a free-running optical local-oscillator source. The optical receiver employs a signal combiner that combines, into an electrical output signal, the in-phase and quadrature-phase electrical signals generated as a result of the quadrature detection of the optical input signal. Depending on the frequency offset between the local-oscillator signal and the input signal, the electrical output signal produced by the signal combiner can be a desired baseband signal or an intermediate-frequency signal. The latter signal can be demodulated to recover the baseband signal in a relatively straightforward manner, e.g., using a conventional intermediate-frequency electrical demodulator coupled to the signal combiner. | 11-15-2012 |
20130272721 | OPTICAL NETWORK DEVICE EMPLOYING THREE-LEVEL DUOBINARY MODULATION AND METHOD OF USE THEREOF - Introduced herein is an optical network device employing three-level duobinary modulation and a method of use thereof. One embodiment of an optical network receiver module includes: (1) an optical input configured to receive an optical non-return-to-zero (NRZ) signal having a data rate, and (2) an encoder having a maximum bandwidth, coupled to the optical input and configured to receive and encode the optical NRZ signal into an electrical three-level duobinary signal, the maximum bandwidth being related to, but substantially less than, the data rate. | 10-17-2013 |
Vincent Etienne Houtsma, New Providence, NJ US
Patent application number | Description | Published |
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20090324250 | Wireless transmitters - A wireless transmitter includes an optical modulator, an optical power splitter, a plurality of electrical drivers, and a plurality of antennas. The optical power splitter has a plurality of optical outputs and has an optical input connected to receive a modulated optical carrier from the optical modulator. Each driver is configured to detect a portion of the modulated optical carrier output by one of the optical outputs of the optical power splitter. Each antenna is connected to be driven by one of the electrical drivers. | 12-31-2009 |
20100054761 | Monolithic coherent optical detectors - An optical receiver has a monolithically integrated electrical and optical circuit that includes a substrate with a planar surface. Along the planar surface, the monolithically integrated electrical and optical circuit has an optical hybrid, one or more variable optical attenuators, and photodetectors. The optical hybrid is connected to receive light beams, to interfere light of said received light beams with a plurality of relative phases and to output said interfered light via optical outputs thereof. Each of the one or more variable optical attenuators connects between a corresponding one of the optical outputs and a corresponding one of the photodetectors. | 03-04-2010 |
Vincent Etienne Houtsma, Berkeley Heights, NJ US
Patent application number | Description | Published |
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20090029536 | Bipolar transistors with vertical structures - A method for fabricating a bipolar transistor includes forming a vertical sequence of semiconductor layers, forming an implant mask on the last formed semiconductor layer, and implanting dopant ions into a portion of one or more of the semiconductor layers. The sequence of semiconductor layers includes a collector layer, a base layer that is in contact with the collector layer, and an emitter layer that is in contact with the base layer. The implanting uses a process in which the implant mask stops dopant ions from penetrating into a portion of the sequence of layers. | 01-29-2009 |
20090146179 | Planar arrays of photodiodes - An apparatus includes a light detector. The light detector includes a substrate with a planar surface and an array of photodiodes located along the planar surface. Each photodiode has a sequence of different semiconductor layers stacked vertically over the planar surface. The photodiodes are electrically connected in series. | 06-11-2009 |