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公开(公告)号：US20190158208A1
公开(公告)日：2019-05-23
申请号：US16156065
申请日：2018-10-10
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
IPC: H04J14/02
CPC classification number: H04J14/0227 , H04B10/66 , H04B10/677 , H04J14/0221
Abstract: Optical signal receivers and methods are provided that include an optical resonator that allows optical signal energy of multiple wavelengths to enter and accumulate inside the optical resonator. A portion of optical signal energy of each wavelength is emitted from the optical resonator at an output, and the individual wavelengths may be separated. A detector aligned with the output detects the emitted optical signal energy of at least one of the wavelengths. The detector is configured to detect disturbances to the emitted optical signal energy and determine a modulated characteristic in the received optical signal energy of the wavelength.
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公开(公告)号：US10256917B2
公开(公告)日：2019-04-09
申请号：US15717736
申请日：2017-09-27
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
IPC: H04B10/61 , H04B10/11 , H04B10/556
Abstract: Aspects are generally directed to receivers and methods for optically demodulating optical signals. In one example, a receiver includes an optical resonator to receive an optical signal, the optical resonator including an optical medium interposed between first and second semi-reflective surfaces, where the first and second semi-reflective surfaces are positioned to resonate optical signal energy, and the optical resonator is configured to disrupt the optical signal energy resonance responsive to a variation in the received optical signal. The receiver may further include a probe source positioned to provide an optical probe beam to the optical medium, the optical medium being configured to interrupt the optical probe beam during the optical signal energy resonance and to transmit at least a portion of the optical probe beam in response to the disruption of the optical signal energy resonance, and a detector to detect the transmitted portion of the optical probe beam.
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公开(公告)号：US10243670B2
公开(公告)日：2019-03-26
申请号：US15816529
申请日：2017-11-17
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
Abstract: Aspects are generally directed to optical signal receivers and methods. In one example, a receiver includes a pump assembly configured to produce an encoded pump signal. The receiver includes an optical resonator positioned to receive an optical signal and the encoded pump signal, the optical resonator including an optical medium to accumulate resonant optical signal energy based on the optical signal, and the optical resonator being configured to emit output optical signal energy and disturb the output optical signal energy in response to a variation in the optical signal, the optical medium being further configured to modify a waveform shape of the output optical signal energy based on the encoded pump signal. The receiver further includes a detector to detect the output optical signal energy and determine a characteristic of the variation in the optical signal based on the waveform shape of the output optical signal energy.
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公开(公告)号：US10225020B2
公开(公告)日：2019-03-05
申请号：US15725457
申请日：2017-10-05
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
Abstract: Optical signal receivers and methods are provided that include first and second optical resonators, each of which receives a portion of an arriving optical signal. The first optical resonator is tuned to a carrier wavelength and accumulates resonant optical signal energy whose output is disturbed responsive to a transition in the arriving optical signal. The second optical resonator is detuned from the carrier wavelength but also exhibits a disturbed output responsive to the transition in the arriving optical signal. Detectors detect the output disturbances from the two optical resonators to determine characteristics of the transition in the arriving optical signal.
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公开(公告)号：US10211880B2
公开(公告)日：2019-02-19
申请号：US15496375
申请日：2017-04-25
Applicant: Raytheon Company
Inventor： Gary M. Graceffo , Andrew Kowalevicz
Abstract: A system, method, and computer program product for chaotically generating a pseudorandom number sequence, such as for use in spread spectrum communications systems and in cryptographic systems. Chaotically generated pseudorandom numbers are not cyclostationary in nature, so output values encoded via such non-cyclostationary bases have no clear correlations. Spread signal communications systems using chaotically generated spreading codes thus operate without rate line artifacts, increasing their resistance to signal detection and to determinations of underlying signal chip rates and signal symbol rates. Broadcasts and guided transmissions (including either conductive wire or optical transmission media), in both radio frequency and optical systems are supported. Common spread spectrum communications systems including DSSS and FHSS may be strengthened through the use of chaotically generated spreading codes. Similarly, keys and nonces generated for cryptographic systems may be improved over those based on conventionally generated pseudorandom numbers.
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Patent Agency Ranking
公开(公告)号：US20180145760A1
公开(公告)日：2018-05-24
申请号：US15857141
申请日：2017-12-28
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz
IPC: H04B10/50 , H04B10/2575 , H04B1/00 , H04B10/00
CPC classification number: H04B10/50572 , 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.
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公开(公告)号：US20180102853A1
公开(公告)日：2018-04-12
申请号：US15725457
申请日：2017-10-05
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
CPC classification number: H04B10/612 , G02B5/28 , G02F2/00
Abstract: Optical signal receivers and methods are provided that include first and second optical resonators, each of which receives a portion of an arriving optical signal. The first optical resonator is tuned to a carrier wavelength and accumulates resonant optical signal energy whose output is disturbed responsive to a transition in the arriving optical signal. The second optical resonator is detuned from the carrier wavelength but also exhibits a disturbed output responsive to the transition in the arriving optical signal. Detectors detect the output disturbances from the two optical resonators to determine characteristics of the transition in the arriving optical signal.
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公开(公告)号：US20170070234A1
公开(公告)日：2017-03-09
申请号：US15210230
申请日：2016-07-14
Applicant: Raytheon Company
Inventor： Gary M. Graceffo , Andrew Kowalevicz
Abstract: Embodiments of clock authentication circuitry (CAC) are generally described herein. The CAC may comprise a compression component, such as a logic gate, to compress a candidate clock signal that is to be authenticated against a reference clock signal. The CAC may further comprise a digital-to-analog converter (DAC) that may be connected to an analog-to-digital converter (ADC) of the CAC. An ADC output sequence may be generated when a predetermined input sequence is input to the DAC while the DAC and the ADC are driven by the compressed candidate clock signal. The candidate clock signal may be authenticated based on an error measurement between the ADC output sequence and a reference ADC output sequence.
Abstract translation: 时钟认证电路（CAC）的实施例在此通常被描述。 CAC可以包括诸如逻辑门的压缩组件，以压缩相对于参考时钟信号被认证的候选时钟信号。 CAC还可以包括可以连接到CAC的模拟 - 数字转换器（ADC）的数模转换器（DAC）。 当DAC和ADC由压缩的候选时钟信号驱动时，可以在将规定的输入序列输入到DAC时产生ADC输出序列。 候选时钟信号可以基于ADC输出序列和参考ADC输出序列之间的误差测量来认证。
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39.发明授权Non-retroreflective optical threat detection system and methods having an imaging detector aligned with a tilted image plane to reconstruct an image from plural image slices 有权非回归光学威胁检测系统和方法，其具有与倾斜图像平面对准的成像检测器，以从多个图像切片重建图像公开(公告)号：US09018575B2
公开(公告)日：2015-04-28
申请号：US13714637
申请日：2012-12-14
Applicant: Raytheon Company
Inventor： Andrew Kowalevicz , Frank Allen Birdsong, Jr.
Abstract: Methods and apparatus for covert detection of an interrogating device. In one example a method includes receiving an interrogation beam at an optical system, imaging a scene including a source of the interrogation beam without retro-reflecting the interrogation beam to produce an image, and analyzing the image to determine an approximate location of the source within the scene. In some examples, a threat detection sensor is used to further analyze the interrogation beam to determine information about the interrogating device.
Abstract translation: 用于秘密检测询问装置的方法和装置。 在一个示例中，一种方法包括在光学系统处接收询问光束，对包括询问光源的场景进行成像，而不回复询问光束以产生图像，并且分析图像以确定源的近似位置 现场。 在一些示例中，使用威胁检测传感器来进一步分析询问光束以确定关于询问设备的信息。
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40.发明公开公开(公告)号：US20230261748A1
公开(公告)日：2023-08-17
申请号：US17670119
申请日：2022-02-11
Applicant: RAYTHEON COMPANY
Inventor： James Talamonti , Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
IPC: H04B10/2581 , H04B10/071 , H04B10/67
CPC classification number: H04B10/2581 , H04B10/67 , H04B10/071
Abstract: An optical signal receivers, systems including the optical signal receivers, and methods of operating the same include a multimode fiber circulator including a first port, a second port, and a third port, a first multimode fiber cable coupled to the first port and having an input configured to receive a complex modulated optical signal and provide the complex modulated optical signal to the first port of the multimode fiber circulator, a second multimode fiber cable including a low Q optical resonator coupled to the second port of the multimode fiber circulator that is configured to receive the complex modulated optical signal from the second port of the multimode circulator, and a third multimode fiber cable coupled to the third port of the multimode fiber circulator that is configured to receive a reflected optical signal from the third port of the multimode circulator, the reflected optical signal being reflected from the low Q optical resonator.
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