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公开(公告)号：US11159244B2
公开(公告)日：2021-10-26
申请号：US17027177
申请日：2020-09-21
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz
IPC: H04B10/61
Abstract: An optical communications receiver and a process for decoding an FSK modulated optical signal are disclosed. The receiver and process are configured to receive the FSK modulated optical input signal and to produce an electrical output signal having characteristics representative of FSK modulation of the FSK modulated input signal, and to process the electrical output signal to produce a decoded information signal.
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公开(公告)号：US11133873B1
公开(公告)日：2021-09-28
申请号：US17082897
申请日：2020-10-28
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Benjamin P. Dolgin , Gary M. Graceffo
Abstract: An optical receiver includes an inlet aperture configured to receive an incident optical signal and a plurality of optical components configured to separate the incident optical signal into an amplitude modulated transmitted linearly s-polarized signal, an amplitude modulated transmitted linearly p-polarized signal, an amplitude modulated reflected linearly s-polarized signal, and an amplitude modulated reflected linearly p-polarized signal. The optical components further combine the amplitude modulated transmitted linearly s-polarized signal and amplitude modulated transmitted linearly p-polarized signal into an amplitude modulated transmitted linearly polarized combined signal, combine the amplitude modulated reflected linearly s-polarized signal and amplitude modulated reflected linearly p-polarized signal into an amplitude modulated reflected linearly polarized combined signal, and provide the amplitude modulated transmitted linearly polarized combined signal and the amplitude modulated reflected linearly polarized combined signal.
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公开(公告)号：US11101896B2
公开(公告)日：2021-08-24
申请号：US16380269
申请日：2019-04-10
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
IPC: H04B10/67
Abstract: Photo-resonator optical detectors and optical receiver systems incorporating same, In one example, an optically resonant detector includes a housing having an optical window, a photodetector disposed within the housing, and an optical resonator disposed in optical alignment with the photodetector within the housing and positioned between the optical window and the photodetector, the optical resonator being configured to receive an input optical signal via the optical window and to provide an output optical signal to the photodetector.
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公开(公告)号：US11012160B2
公开(公告)日：2021-05-18
申请号：US16377927
申请日：2019-04-08
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
IPC: H04B10/61
Abstract: Optical signal receivers and methods are provided that include multiple optical resonators, each of which receives a portion of an arriving optical signal. Various of the optical resonators are tuned or detuned from a carrier wavelength, and produce an intensity modulated output signal in response to modulation transitions in the arriving optical signal. A detector determines phase transitions in the arriving optical signal, by analyzing the intensity modulation output signals from the optical resonators, and distinguishes between differing phase transitions that result in a common final state of the arriving optical signal.
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公开(公告)号：US20210099232A1
公开(公告)日：2021-04-01
申请号：US17035170
申请日：2020-09-28
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz , Benjamin P. Dolgin
IPC: H04B10/516
Abstract: An optical transmitter and a method of producing a low-photon-density modulated optical signal are disclosed. The optical transmitter and method include an optical source configured to emit a continuous optical carrier waveform, a dilation module configured to apply a spreading code to a data payload to spread each of the plurality of symbols in time to expand the symbol duration by a dilation factor and produce a corresponding plurality of time-dilated symbols, the plurality of time-dilated symbols having a lower photon density than the plurality of symbols; a mapping module configured to map the plurality of time-dilated symbols to a modulation scheme; and a modulator configured to modulate the optical carrier waveform with the plurality of time-dilated symbols according to the modulation scheme to produce the low-photon-density modulated optical signal encoded with the plurality of time-dilated symbols corresponding to the data payload.
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Patent Agency Ranking
公开(公告)号：US20200371328A1
公开(公告)日：2020-11-26
申请号：US16881962
申请日：2020-05-22
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Benjamin P. Dolgin , Gary M. Graceffo , Paul Searcy , Rizwan Parvez
IPC: G02B17/00 , H04B10/66 , H04B10/114
Abstract: Method and apparatus to maintain a resonant condition of an optical cavity such that the optical path length through the optical cavity is independent or minimally dependent on the angle of incidence of a received optical signal are disclosed. A material within the optical cavity has an index of refraction that varies as a function of an angle of propagation of light within the material, thereby achieving the independence of the optical path length and the angle of incidence. The resonant condition is maintained over a range of angles of incidence of the received optical signal.
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公开(公告)号：US10243673B2
公开(公告)日：2019-03-26
申请号：US15816670
申请日：2017-11-17
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Andrew Kowalevicz , Gary M. Graceffo
Abstract: Aspects are generally directed to optical signal receivers and methods. In one example, a receiver includes an optical resonator assembly configured to receive an optical signal at each of a plurality of optical resonators, each optical resonator configured to resonate optical signal energy at a corresponding frequency of the received optical signal, each optical resonator being tuned to a different corresponding frequency of the received optical signal, and each optical resonator being configured to output corresponding output optical signal energy. The receiver includes a detector assembly to detect the corresponding output optical signal energy from each optical resonator, and a signal processing circuit configured detect a frequency variation of the received optical signal based on the corresponding output optical signal energy from at least two of the plurality of optical resonators, and configured to generate a digital signal based on the frequency variation.
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公开(公告)号：US20180313642A1
公开(公告)日：2018-11-01
申请号：US15963759
申请日：2018-04-26
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Andrew Kowalevicz , Gary M. Graceffo
IPC: G01B11/06
CPC classification number: G01B11/06
Abstract: Methods and apparatus for measuring thickness and related properties of transparent objects, such as glass. In one example a measurement system includes a light source that produces a collimated optical beam, a modulator that modulates the collimated optical beam to produce a collimated modulated optical beam, optics configured to direct the collimated modulated optical beam to illuminate the transparent test object, and a detector sub-system that receives an intensity-modulated optical beam output from the test object and measures variations in intensity of the intensity-modulated optical beam corresponding to an intensity modulation of the intensity-modulated optical beam, the intensity-modulated optical beam being derived from interaction of the collimated modulated input optical beam with the transparent test object, the detector sub-system being further configured to produce a representation of the thickness and/or related properties of the test object based on the measured variations in intensity of the intensity-modulated optical beam.
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79.发明申请公开(公告)号：US20180234231A1
公开(公告)日：2018-08-16
申请号：US15892799
申请日：2018-02-09
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Andrew Kowalevicz , Gary M. Graceffo
CPC classification number: H04L7/0075 , H04B10/60
Abstract: Aspects are generally directed to optical receivers and methods for detecting a non-persistent communication superimposed on an overt communication channel. In one example, an optical receiver includes an optical resonator to receive an optical signal having one or more symbols encoded thereon at a modulated symbol repetition rate, the modulated symbol repetition rate being modulated relative to a nominal symbol repetition rate. The optical resonator is configured to emit an intensity-modulated output optical signal that has a variation in an intensity thereof corresponding to a symbol transition in the optical signal. The optical receiver further includes signal processing circuitry including a clock configured to generate a reference signal, a photodetector configured to generate a trigger signal, and a non-persistent communication decoder configured to determine a temporal misalignment between the symbol transition and the nominal symbol repetition rate based on the reference signal and the trigger signal.
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80.发明授权公开(公告)号：US09973281B2
公开(公告)日：2018-05-15
申请号：US15717175
申请日：2017-09-27
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
CPC classification number: H04B10/671 , G02B5/28 , G02B17/004 , G02F2/00 , H04B10/1123
Abstract: Optical signal receivers and methods are provided that include an optical resonator that allows an optical signal to enter and optical signal energy to accumulate at regions inside the optical resonator. A portion of optical signal energy is emitted from among various regions of the optical resonator, such that a combination of the emitted optical signal energy is disturbed when a phase transition occurs in the received optical signal. A detector aligned with the output detects the combined emitted optical signal energy and is configured to detect the disturbance and determine a characteristic of the phase transition in the received optical signal based upon the disturbance.
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