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公开(公告)号：US20210006336A1
公开(公告)日：2021-01-07
申请号：US16920011
申请日：2020-07-02
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Benjamin P. Dolgin , Gary M. Graceffo
Abstract: Apparatus, systems, and methods include leveraging the angular dependence of the angle of arrival of the incoming optical signal at an optical resonator and the output response signal to adjust the operating condition of the optical resonator. The optical resonator is dynamically tuned by rotating the optical resonator to optimize signal-to-noise ratio or other parameters for different modulation formats of the incoming optical signal or other different operating conditions.
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公开(公告)号：US20190319714A1
公开(公告)日：2019-10-17
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：US20190280780A1
公开(公告)日：2019-09-12
申请号：US16296481
申请日：2019-03-08
Applicant: RAYTHEON COMPANY
Inventor： Gary M. Graceffo , Andrew Kowalevicz , Benjamin P. Dolgin
Abstract: Optical receivers configured to demodulate phase modulated optical signals. In one example, an optical signal receiver includes an optical resonator configured to receive an arriving optical signal and to emit an output optical signal in response to receiving the arriving optical signal, the optical resonator being further configured to transform phase transitions corresponding to phase modulation of the arriving optical into intensity modulation of the output optical signal, an opto-electrical converter configured to convert the output optical signal into an electrical signal, a pulse detector configured to detect pulses in the electrical energy indicative of the phase transitions in the arriving optical signal, and a memory configured to record timing information associated with the pulses detected by the pulse detector.
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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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Patent Agency Ranking
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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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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