公开(公告)号：US09887779B2

公开(公告)日：2018-02-06

申请号：US14996830

申请日：2016-01-15

Applicant: RAYTHEON COMPANY

Inventor： Andrew Kowalevicz

IPC: H04B10/50 ,  H04B10/2575 ,  H04B1/00 ,  H04B10/00

CPC classification number: H04B10/5057 ,  H04B1/00 ,  H04B10/00 ,  H04B10/2575 ,  H04B2210/006

Abstract: Optoelectronic oscillator systems and an optoelectronic oscillator noise reduction method. One example of an optoelectronic oscillator system includes an optical source positioned at a first end of a fiber-optic path, the optical source being configured to transmit an optical signal along the fiber-optic path, an optical modulator positioned to receive and modulate the optical signal based on at least a reference signal, a retro-reflector positioned at a second end of the fiber-optic path, the retro-reflector being configured to receive and retro-reflect the optical signal, the retro-reflected optical signal having at least a frequency range of inherent fiber noise canceled, and an optical circulator positioned along the fiber-optic path between the optical modulator and the retro-reflector, the optical circulator being configured to direct the optical signal to the retro-reflector and direct the retro-reflected optical signal along a feedback path to a first photodetector to generate the reference signal.

公开(公告)号：US20170244443A1

公开(公告)日：2017-08-24

申请号：US15052181

申请日：2016-02-24

Applicant: Raytheon Company

Inventor： Gary M. Graceffo ,  Andrew Kowalevicz

IPC: H04B1/707 ,  H04L9/32 ,  G06F21/64

CPC classification number: G06F21/64

Abstract: Generally discussed herein are systems, devices, and methods for waveform watermarking. A device can include an overt symbol modulator to receive mapped overt data and provide overt data modulated in accord with an overt data modulation scheme, a covert symbol modulator to receive mapped covert data and provide, using dither modulation and micro-amplitude modulation, covert data modulated in accord with a covert data modulation scheme, a switch to receive the modulated covert data and the modulated overt data and forward the covert data and modulated overt data based on a signal indicating whether covert data is to be transmitted or covert data is to be transmitted, and transmission circuitry to produce an electromagnetic waveform of the modulated data from the switch.

公开(公告)号：US09692139B2

公开(公告)日：2017-06-27

申请号：US14792977

申请日：2015-07-07

Applicant: Raytheon Company

Inventor： Andrew Kowalevicz ,  Gary M. Graceffo

IPC: H04J4/00 ,  H01Q21/00

CPC classification number: H01Q21/00 ,  H01Q21/20 ,  H04B2210/006

Abstract: Methods and apparatus for an OAM system having simultaneous OAM states. In embodiments, m data streams are encoded and split into n copies each of which is delayed to produce a distinct RF orbital angular momentum (OAM) mode. The delayed copies are combined using wave division multiplexing. The combined m data streams are transmitted using n antenna elements.

公开(公告)号：US09400414B2

公开(公告)日：2016-07-26

申请号：US13680950

申请日：2012-11-19

Applicant: Raytheon Company

Inventor： Andrew Kowalevicz

IPC: H01J3/14 ,  H01L27/00 ,  G03B17/00 ,  G02B27/09

CPC classification number: G03B17/00 ,  G02B27/0905 ,  G02B27/0961

Abstract: A non-retro-reflective imaging system and methods in which a relay optic is configured to segment a source image into a plurality of slices and reimage each of the slices individually onto a rotated image plane such that a substantially in-focus reconstruction of the entire image is obtained, while substantially eliminating retro-reflection from the system. According to one example a non-retro-reflective imaging system includes a segmented relay optic configured to reimage a source image onto an image plane tilted with respect to an optical axis of the system, and further configured to slice the image volume into a plurality of image slices and spatially position the plurality of image slices such that a depth of focus of each image slice overlaps the tilted image plane. The system further includes an image sensor co-aligned with the tilted image plane and configured to produce a reconstructed image from the plurality of image slices.

Abstract translation: 一种非逆反射成像系统和方法，其中中继光学器件被配置为将源图像分割成多个切片并且将每个切片重新图像到旋转的图像平面上，使得基本上在整个 获得图像，同时基本上消除了系统的反射。 根据一个示例，非回归反射成像系统包括分段继电器光学器件，其被配置为将源图像重新图像到相对于系统的光轴倾斜的图像平面上，并且还被配置为将图像体积切成多个 图像切片并且空间地定位多个图像切片，使得每个图像切片的焦深与倾斜的图像平面重叠。 该系统还包括与倾斜图像平面对齐并被配置为从多个图像切片产生重建图像的图像传感器。

公开(公告)号：US12189221B2

公开(公告)日：2025-01-07

申请号：US18211004

申请日：2023-06-16

Applicant: RAYTHEON COMPANY

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

IPC: G02F1/03

Abstract: Aspects and examples are directed to programmable optical finite impulse response filters and optical infinite impulse response filters, which may be implemented as photonic integrated circuits.

公开(公告)号：US20220182147A1

公开(公告)日：2022-06-09

申请号：US17112703

申请日：2020-12-04

Applicant: RAYTHEON COMPANY

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

IPC: H04B10/40 ,  H04B10/532

Abstract: Monostatic optical transceivers, systems, and methods of operating the same include a single aperture, a transmitter that provides a modulated and polarized optical transmit beam, a receiver that receives a modulated and polarized optical receive beam at an optical resonator included therein and processes the received optical receive beam to determine information from the received optical receive beam, a polarizing beam splitter that reflects the optical transmit beam, a polarization rotator that rotates the polarization of the reflected optical transmit beam by a fixed number of degrees in a transmit direction in a coordinate system of the monostatic transceiver, and a waveplate that modifies the polarization of the rotated optical transmit beam.

公开(公告)号：US11309964B1

公开(公告)日：2022-04-19

申请号：US17123795

申请日：2020-12-16

Applicant: RAYTHEON COMPANY

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

IPC: H04B10/2507 ,  H04B10/079 ,  H04B10/40 ,  G02B6/42

Abstract: Free space optical systems and methods of controlling the same for reducing signal fading of encoded optical beams transmitted in a communication channel are provided. Adjacent pairs of a plurality of apertures are separated by a distance being at least greater than the coherence width of the propagation medium of the communication channel. Due to averaging of the beams, variation in power at an optical receiver is reduced. By using an optical resonator in the optical receiver, the beams are converted into an intensity modulation on a non-interfering basis, thereby permitting recovery and decoding of the signal.

公开(公告)号：US11307395B2

公开(公告)日：2022-04-19

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: H04B10/66 ,  G02B17/00

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.

公开(公告)号：US11290191B2

公开(公告)日：2022-03-29

申请号：US16853107

申请日：2020-04-20

Applicant: RAYTHEON COMPANY

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

IPC: H04B10/06 ,  H04B10/61 ,  H04B10/556 ,  H01S3/10 ,  H01S3/13

Abstract: An optical receiver including an optical resonator and a steering mechanism coupled to the at least one optical resonator is disclosed. The optical resonator is configured to receive a phase modulated input optical signal and to produce an intensity modulated output optical signal. An intensity modulation of the output optical signal is representative of the phase modulation of the input optical signal. The optical receiver further comprises an optical-electrical converter that detects the intensity modulated output optical signal and converts the intensity modulated output optical signal to an electrical signal, and signal processor that receives the electrical signal, performs symmetric phase change measurements based on the electrical signal, and provides a control signal to actuate the steering mechanism to steer the optical resonator to maintain normal incidence of the phase modulated input optical signal on a surface of at least one optical resonator.

公开(公告)号：US20220014276A1

公开(公告)日：2022-01-13

申请号：US17371635

申请日：2021-07-09

Applicant: RAYTHEON COMPANY

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

IPC: H04B10/61 ,  H04L7/00

Abstract: An optical signal receiver includes a multimode waveguide for receiving a complex modulated optical signal, an optical resonator that receives the complex modulated optical signal from the multimode waveguide and converts the complex modulated optical signal to an intensity modulated signal, and a detector that is 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 that provides a detected signal.