公开(公告)号：US20220329326A1

公开(公告)日：2022-10-13

申请号：US17717763

申请日：2022-04-11

Applicant: RAYTHEON COMPANY

Inventor： Andrew Kowalevicz ,  Benjamin P. Dolgin ,  Gary M. Graceffo ,  Jae H. Kyung ,  Maurice J. Halmos

IPC: H04B10/69

Abstract: Optical signal receivers, systems, and methods of operating the same include a non-line of sight optical signal receiver configured to receive and detect a complex modulated optical signal through a non-line of site propagation path from an optical transmitter, comprising an optical resonator configured to receive the complex modulated optical signal through the non-line of sight propagation path, and to convert the complex modulated optical signal to an intensity modulated signal, and a detector configured to convert the intensity modulated signal into an electrical signal, the electrical signal having an amplitude indicative of an intensity of the intensity modulated signal from the optical resonator, and to provide a detected signal.

公开(公告)号：US11411654B1

公开(公告)日：2022-08-09

申请号：US17211350

申请日：2021-03-24

Applicant: RAYTHEON COMPANY

Inventor： Gary M. Graceffo ,  Andrew Kowalevicz ,  Benjamin P. Dolgin

IPC: H04B10/548 ,  H04L9/40 ,  H04B10/60

Abstract: Communications systems and methods of controlling the same include generating and processing a constant envelope phase-modulated optical signal, the systems including an optical source configured to provide a carrier waveform, an encoding module configured to encode the data as a plurality of symbol sequences, a mapping module configured to convert the plurality of symbol sequences to a plurality of phase state changes and a plurality of directions according to a path-dependent phase modulation scheme, and a phase modulator configured to modulate the carrier waveform with the plurality of phase state changes and directions to generate the constant envelope phase-modulated optical signal.

公开(公告)号：US11374659B2

公开(公告)日：2022-06-28

申请号：US17082545

申请日：2020-10-28

Applicant: RAYTHEON COMPANY

Inventor： Gary M. Graceffo ,  Andrew Kowalevicz ,  Benjamin P. Dolgin

IPC: H04B10/00 ,  H04B11/00 ,  H04B10/548 ,  H04B10/524 ,  H04B13/02 ,  H04J14/00

Abstract: Methods and apparatus for acoustic to optical communications. In one example, a method includes performing active optical measurements of modulation-based surface deformations at a surface of a body of water using an active optical receiver to produce modulation data, the modulation-based surface deformations being representative of a modulation of a modulated acoustic signal originating beneath the surface of the body of water, between instances of performing the active optical measurements of the modulation-based surface deformations, optically measuring surface conditions of the body of water to produce channel information, and based on the modulation data and the channel information, recovering data encoded in the modulation of the modulated acoustic signal.

公开(公告)号：US11349569B2

公开(公告)日：2022-05-31

申请号：US16664071

申请日：2019-10-25

Applicant: RAYTHEON COMPANY

Inventor： Gary M. Graceffo ,  Andrew Kowalevicz ,  Benjamin P. Dolgin

IPC: H04B10/2575 ,  H04B10/40

Abstract: A transmitter, receiver and transceiver system that may be used for both transmitting and receiving modulated signals are disclosed. The system includes an Electrical-to-Optical (E2O) converter that receives a Radio Frequency (RF) signal and transmits an optical signal and/or an Optical-to-Optical (O2O) that performs a wavelength translation from one wavelength to another wavelength. The Electrical-to-Optical (E2O) converter includes a vapor cell that converts the RF signal to an optical signal.

公开(公告)号：US11303356B1

公开(公告)日：2022-04-12

申请号：US16853229

申请日：2020-04-20

Applicant: RAYTHEON COMPANY

Inventor： Andrew Kowalevicz ,  Benjamin P. Dolgin ,  Gary M. Graceffo

IPC: H04B10/00 ,  H04B10/112 ,  H04B10/54

Abstract: Methods and apparatus for maintaining transmitter-receiver alignment in a free space optical communications system without substantially moving the receiver element and with very little to no imparted momentum, while also allowing for higher tuning speeds and less system complexity than conventional solutions. The methods and apparatus allow for a large field of regard at the optical receiver, without the need for electromechanical gimbals to move the entire receiver unit and without the need for steering mirrors to move and align the incoming optical beam.

公开(公告)号：US11199754B2

公开(公告)日：2021-12-14

申请号：US16903129

申请日：2020-06-16

Applicant: Raytheon Company

Inventor： Andrew M. Kowalevicz ,  Benjamin P. Dolgin ,  Gary M. Graceffo

IPC: G02F2/00 ,  H04B10/556 ,  H04B10/67 ,  H04B10/11 ,  H04B10/516

Abstract: A demodulator can include an optical resonator. The optical resonator can include a resonant cavity that extends between a first surface that is partially reflective and a second surface that is at least partially reflective. The first surface can receive a phase-modulated optical signal that has a time-varying phase. The resonant cavity can accumulate resonant optical signal energy based at least in part on the phase-modulated optical signal. The first surface can direct a fraction of the resonant optical signal energy out of the optical resonator to form an intensity-modulated optical signal that has a time-varying intensity. A data detector can receive at least a portion of the intensity-modulated optical signal and, in response, generate an intensity-modulated electrical signal that has a time-varying intensity that corresponds to the time-varying phase of the phase-modulated optical signal.

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.

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

IPC: H04B10/60 ,  H04B10/61

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.

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.

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.