Patents Assigned to Phase Sensitive Innovations, Inc.
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Patent number: 9544510Abstract: An apparatus and method may be used to create images, e.g., three-dimensional images, based on received radio-frequency (RF), e.g., millimeter wave, signals carrying image data. The RF signals may be modulated onto optical carrier signals, and the resulting modulated optical signals may be cross-correlated. The resulting cross-correlations may be used to extract image data that may be used to generate three-dimensional images.Type: GrantFiled: January 8, 2014Date of Patent: January 10, 2017Assignee: Phase Sensitive Innovations, Inc.Inventors: Janusz Murakowski, Garrett Schneider, Shouyuan Shi, Christopher A. Schuetz, Dennis W. Prather
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Patent number: 9525489Abstract: A method of RF signal processing comprises receiving an incoming RF signal at each of a plurality of antenna elements that are arranged in a first pattern. The received RF signals from each of the plurality of antenna elements are modulated onto an optical carrier to generate a plurality of modulated signals that each have at least one sideband. The modulated signals are directed along a corresponding plurality of optical channels with outputs arranged in a second pattern corresponding to the first pattern. A composite optical signal is formed using light emanating from the outputs of the plurality of optical channels. Non-spatial information contained in at least one of the received RF signals is extracted from the composite signal.Type: GrantFiled: July 3, 2015Date of Patent: December 20, 2016Assignee: Phase Sensitive Innovations, Inc.Inventors: Chris Schuetz, Janusz Murakowski, Garrett Schneider, Shouyuan Shi, Dennis Prather
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Patent number: 9297702Abstract: A first image may be obtained using locked (relative) phases. A second image may be obtained using unlocked (e.g., randomized) phases. Data of the second image may be subtracted from data of the first image. The result may then undergo further processing, if desired, e.g., to further enhance the resulting image.Type: GrantFiled: May 10, 2011Date of Patent: March 29, 2016Assignee: Phase Sensitive Innovations, Inc.Inventors: Richard D. Martin, Christopher A. Schuetz, Dennis W. Prather, Thomas E. Dillon
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Patent number: 9287990Abstract: An optical modulation apparatus for modulating an electromagnetic (e.g., radio frequency (RF)) signal onto an optical carrier signal may be arranged to feed back at least a portion of the optical carrier signal, while excluding first-order sidebands, which may help increase modulation efficiency and improve output power, while retaining high modulation bandwidth. Such arrangements may be implemented, for example, using a Fabry-Perot resonator or a ring resonator in combination with a Mach-Zehnder interferometer or a Michelson interferometer.Type: GrantFiled: April 2, 2014Date of Patent: March 15, 2016Assignee: Phase Sensitive Innovations, Inc.Inventors: Janusz Murakowski, Garrett Schneider, Christopher A. Schuetz, Dennis W. Prather
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Publication number: 20150139253Abstract: An optical modulation apparatus for modulating an electromagnetic (e.g., radio frequency (RF)) signal onto an optical carrier signal may use carrier recycling to increase modulation efficiency. Such an arrangement may be implemented, e.g., using a Fabry-Perot topology and/or using a travelling-wave modulator.Type: ApplicationFiled: November 19, 2013Publication date: May 21, 2015Applicant: PHASE SENSITIVE INNOVATIONS, INC.Inventors: Janusz Murakowski, Garrett Schneider, Christopher A. Schuetz, Dennis W. Prather
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Publication number: 20150139656Abstract: An optical modulation apparatus for modulating an electromagnetic (e.g., radio frequency (RF)) signal onto an optical carrier signal may be arranged to feed back at least a portion of the optical carrier signal, while excluding first-order sidebands, which may help increase modulation efficiency and improve output power, while retaining high modulation bandwidth. Such arrangements may be implemented, for example, using a Fabry-Perot resonator or a ring resonator in combination with a Mach-Zehnder interferometer or a Michelson interferometer.Type: ApplicationFiled: April 2, 2014Publication date: May 21, 2015Applicant: Phase Sensitive Innovations, Inc.Inventors: Janusz Murakowski, Garrett Schneider, Christopher A. Schuetz, Dennis W. Prather
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Patent number: 8848752Abstract: Signal generating systems and methods are described. One signal generation system includes first and second lasers configured to generate first and second laser beams having respective frequencies wherein a difference in the respective frequencies corresponds to an output frequency, a photodetector configured to produce a signal at the output frequency, and first and second electro-optic modulators configured to respectively electro-optically modulate the first and second laser beams using the signal to produce respective first and second modulated optical signals, each of the first and second modulated optical signals having a respective sideband corresponding to the frequency of the other one of the first and second laser beams. The first laser is seeded with the respective sideband of the second modulated optical signal and the second laser is seeded with the respective sideband of the first modulated optical signal to phase-lock the first and second laser beams to each other.Type: GrantFiled: January 18, 2012Date of Patent: September 30, 2014Assignee: Phase Sensitive Innovations, Inc.Inventors: Dennis W. Prather, Garrett Schneider, Janusz Murakowski
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Publication number: 20140270783Abstract: A method and apparatus for regenerating a received radio frequency (RF) signal may mix the received RF signal with a first laser signal, and the result, or a filtered version thereof, may be used to injection-seed a second laser. The result may be mixed with the first laser signal, and the result may be detected to provide a regenerated version of the received RF signal.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: PHASE SENSITIVE INNOVATIONS, INCInventors: Dennis W. Prather, Garrett Schneider, Janusz Murakowski
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Publication number: 20140255039Abstract: An apparatus and/or method may be used for distributed synchronization of oscillators at non-collocated stations by means of transmitting and receiving optical signals having frequencies related to a desired oscillator frequency.Type: ApplicationFiled: March 5, 2013Publication date: September 11, 2014Applicant: PHASE SENSITIVE INNOVATIONS, INCInventors: Dennis W. Prather, Garrett Schneider, Janusz Murakowski
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Publication number: 20140192161Abstract: An apparatus and method may be used to create images, e.g., three-dimensional images, based on received radio-frequency (RP), e.g., millimeter wave, signals carrying image data. The RF signals may be modulated onto optical carrier signals, and the resulting modulated optical signals may be cross-correlated. The resulting cross-correlations may be used to extract image data that may be used to generate three-dimensional images.Type: ApplicationFiled: January 8, 2014Publication date: July 10, 2014Applicant: PHASE SENSITIVE INNOVATIONS, INC.Inventors: Janusz Murakowski, Garrett Schneider, Shouyuan Shi, Christopher A. Schuetz, Dennis W. Prather
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Publication number: 20140079351Abstract: A lithium niobate-based electro-optic modulator may include a ridged optical waveguide structure and/or a thinned substrate.Type: ApplicationFiled: September 20, 2012Publication date: March 20, 2014Applicant: PHASE SENSITIVE INNOVATIONS, INCInventors: Julien Macario, Peng Yao, Dennis W. Prather
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Publication number: 20130301664Abstract: Signal generating systems and methods are described. One signal generation system includes first and second lasers configured to generate first and second laser beams having respective frequencies wherein a difference in the respective frequencies corresponds to an output frequency, a photodetector configured to produce a signal at the output frequency, and first and second electro-optic modulators configured to respectively electro-optically modulate the first and second laser beams using the signal to produce respective first and second modulated optical signals, each of the first and second modulated optical signals having a respective sideband corresponding to the frequency of the other one of the first and second laser beams. The first laser is seeded with the respective sideband of the second modulated optical signal and the second laser is seeded with the respective sideband of the first modulated optical signal to phase-lock the first and second laser beams to each other.Type: ApplicationFiled: January 18, 2012Publication date: November 14, 2013Applicant: PHASE SENSITIVE INNOVATIONS, INC.Inventors: Dennis W. Prather, Garrett Schneider, Janusz Murakowski
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Publication number: 20120288214Abstract: A first image may be obtained using locked (relative) phases. A second image may be obtained using unlocked (e.g., randomized) phases. Data of the second image may be subtracted from data of the first image. The result may then undergo further processing, if desired, e.g., to further enhance the resulting image.Type: ApplicationFiled: May 10, 2011Publication date: November 15, 2012Applicant: PHASE SENSITIVE INNOVATIONS, INC.Inventors: Richard D. Martin, Christopher A. Schuetz, Dennis W. Prather, Thomas E. Dillon
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Patent number: 8159737Abstract: A system and method for locking the relative phase of multiple coherent optical signals, which compensates for optical phase changes induced by vibration or thermal changes in the environment.Type: GrantFiled: April 19, 2010Date of Patent: April 17, 2012Assignee: Phase Sensitive Innovations, Inc.Inventors: Richard D. Martin, Christopher A. Schuetz, Dennis W. Prather, Thomas E. Dillon
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Patent number: 7965435Abstract: A system and method for locking the relative phase of multiple coherent optical signals, which compensates for optical phase changes induced by vibration or thermal changes in the environment.Type: GrantFiled: September 28, 2010Date of Patent: June 21, 2011Assignee: Phase Sensitive Innovations, Inc.Inventors: Christopher A. Schuetz, Richard D. Martin, Dennis W. Prather, Thomas E. Dillon
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Publication number: 20110073772Abstract: A system and method for locking the relative phase of multiple coherent optical signals, which compensates for optical phase changes induced by vibration or thermal changes in the environment.Type: ApplicationFiled: September 28, 2010Publication date: March 31, 2011Applicant: Phase Sensitive Innovations, Inc.Inventors: Christopher A. Schuetz, Richard D. Martin, Dennis W. Prather, Thomas E. Dillon
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Publication number: 20100271683Abstract: A system and method for locking the relative phase of multiple coherent optical signals, which compensates for optical phase changes induced by vibration or thermal changes in the environment.Type: ApplicationFiled: April 19, 2010Publication date: October 28, 2010Applicant: Phase Sensitive Innovations, IncInventors: Christopher A. Schuetz, Richard D. Martin, Dennis W. Prather, Thomas E. Dillon