公开(公告)号：US11216251B2

公开(公告)日：2022-01-04

申请号：US16359248

申请日：2019-03-20

Applicant: Raytheon Company

Inventor： Bishara Shamee ,  Steven R. Wilkinson

IPC: G06F7/58 ,  H04B10/50 ,  H04B10/69 ,  H04K3/00

Abstract: A photonic random signal generator includes an incoherent optical source configured to generate an optical noise signal, a filter configured to generate a filtered optical noise signal using the optical noise signal, a coupler, a photodetector, a filter, and a limiter. The coupler couples the filtered optical noise signal and a delayed version of the filtered optical noise signal to generate a first coupled signal and a second coupled signal. The photodetector generates an output signal representative of a phase difference between the filtered optical noise signal and the delayed version of the filtered optical noise signal using the first coupled signal and the second coupled signal. The filter filters the output signal representative of the phase difference to generate an analog random signal. The limiter thresholds the analog random signal based on a clock signal, to generate a digital random signal.

公开(公告)号：US20200304210A1

公开(公告)日：2020-09-24

申请号：US16359263

申请日：2019-03-20

Applicant: Raytheon Company

Inventor： Bishara Shamee ,  Steven R. Wilkinson

IPC: H04B10/556 ,  H04B10/61

Abstract: A photonic monobit analog-to-digital converter (ADC) includes an incoherent optical source, a dual optical modulator, a coupler, a coherent detector, a limiter, and a DSP. The incoherent optical source generates an optical noise signal. The dual optical modulator modulates phase and amplitude of an input complex baseband signal onto an input optical signal to generate an optical modulated signal. The coupler couples the modulated signal with the optical noise signal to generate a dithered optical signal. The coherent detector coherently detects a dithered in-phase (I) signal component and a dithered quadrature (Q) signal component associated with the input complex baseband signal using the dithered optical signal and a reference optical signal. The limiter outputs a complex decision signal based on the dithered I and Q signal components. The DSP generates a digital signal representative of the input complex baseband signal based on the complex decision signal.

公开(公告)号：US09933688B1

公开(公告)日：2018-04-03

申请号：US15658081

申请日：2017-07-24

Applicant: Raytheon Company

Inventor： Bishara Shamee ,  Steven R. Wilkinson

IPC: H03M1/00 ,  G02F7/00

CPC classification number: G02F7/00 ,  H03M1/12

Abstract: An analog-to-digital converter can produce a digital signal representative of an analog input electrical signal. A continuous-wave laser can lock to a multifrequency optical signal and produce a continuous-wave optical signal. An optical amplitude modulator can modulate the continuous-wave optical signal using the analog input electrical signal to produce a first modulated optical signal. An optical splitter can split the first modulated optical signal into a plurality of modulated optical signals. A plurality of detectors can convert the modulated optical signals into respective modulated electrical signals. A plurality of comparators and a decoder arranged in a flash converter topology can receive the modulated electrical signals and output the digital signal using a timing reference derived from the multifrequency optical signal. Using a relatively high-precision multifrequency optical signal, such as produced by a photonic oscillator, can produce a relatively high-precision device.

公开(公告)号：US20150016827A1

公开(公告)日：2015-01-15

申请号：US14336129

申请日：2014-07-21

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Gabriel N. Price

IPC: H04B10/516

CPC classification number: H04B10/516 ,  H04B10/548 ,  H04B10/61 ,  H04B10/611 ,  H04J14/0298 ,  H04L27/2096 ,  H04L27/2697 ,  H04L27/3818

Abstract: Communication apparatus and techniques, such as for optical communication, can include providing a reference frequency derived from an atomic energy level transition or a molecular energy level transition, generating at least two specified optical carrier signals at least in part using the reference frequency, coherently modulating the specified optical carrier signals using respective baseband information signals to provide respective coherently-modulated optical subcarriers. A combined optical information signal comprising the optical subcarriers can be transmitted to a receiver, such as via a fiber optic cable. In an example, a received optical information signal can be optically Fourier transformed to provide respective coherent outputs, which can be coherently downconverted.

Abstract translation: 诸如用于光通信的通信设备和技术可以包括提供从原子能级转换或分子能级转换导出的参考频率，至少部分地使用参考频率产生至少两个指定的光载波信号，相干调制 指定的光载波信号使用相应的基带信息信号来提供各自的相干调制光子载波。 包括光子载波的组合光信息信号可以例如经由光纤电缆发送到接收机。 在一个示例中，接收到的光信息信号可以被光学傅里叶变换以提供相干相干输出，其可以被相干地下变频。

公开(公告)号：US20140321487A1

公开(公告)日：2014-10-30

申请号：US14330057

申请日：2014-07-14

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Todd O. Clatterbuck ,  Matthew T. Cashen ,  Gabriel N. Price ,  Jeffrey L. Sabala

IPC: H01S3/13

CPC classification number: H01S3/13 ,  G02F1/3526 ,  G04F5/14 ,  H01S3/0057 ,  H01S3/0092 ,  H01S3/1303 ,  H01S3/1305 ,  H01S3/1307 ,  H01S3/139 ,  H01S3/1392

Abstract: Embodiments of an ultra-stable frequency reference generating system and methods for generating an ultra-stable frequency reference using a two-photon Rubidium transition are generally described herein. In some embodiments, a cavity-stabilized reference laser comprising a laser source is locked to a stabilized cavity. A Rubidium cell is interrogated by a stabilized laser output to cause at least a two-photon Rubidium transition and a detector may detect fluorescence resulting from spontaneous decay of the upper state Rubidium transition. The output of the detector is provided at a wavelength of the fluorescence to lock the cavity-stabilized reference laser to generate a stabilized laser output. A frequency comb stabilizer may be locked to the stabilized laser output to generate a super-continuum of optical wavelengths for use in generating an ultra-stable frequency reference.

Abstract translation: 本文通常描述超稳定频率参考产生系统的实施例和使用双光子铷跃迁产生超稳定频率参考的方法。 在一些实施例中，包括激光源的腔稳定的参考激光器被锁定到稳定的腔。 通过稳定的激光输出询问铷电池，以产生至少两光子铷转变，并且检测器可以检测由上状态铷跃迁的自发衰变产生的荧光。 检测器的输出以荧光的波长提供，以锁定腔稳定的参考激光器以产生稳定的激光输出。 频率梳稳定器可以被锁定到稳定的激光输出，以产生用于产生超稳定频率参考的光波长的超连续体。

公开(公告)号：US20130300466A1

公开(公告)日：2013-11-14

申请号：US13938848

申请日：2013-07-10

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Neil R. Nelson

IPC: G04G7/00

CPC classification number: G04G7/00

Abstract: A system for synchronizing a first clock and a second clock includes a receiver associated with the first clock, configured to receive a remote pulse from the second clock. The remote pulse has a pulse repetition frequency and spectral characteristics that are known to the local clock. The system also includes a local pulse emitter configured to create a local pulse at the first clock, and optics configured to align the local pulse and the remote pulse. The system further includes an interferometer configured to create an interference pattern between the local pulse and the remote pulse. A controller is provided that is configured to calculate a time delay between the first clock and the second clock based on the interference pattern between the local pulse and the remote pulse.

Abstract translation: 用于同步第一时钟和第二时钟的系统包括与第一时钟相关联的接收器，被配置为从第二时钟接收远程脉冲。 远程脉冲具有本地时钟已知的脉冲重复频率和频谱特性。 该系统还包括配置成在第一时钟产生本地脉冲的本地脉冲发射器，以及配置成对准本地脉冲和远程脉冲的光学器件。 该系统还包括被配置为在本地脉冲和远程脉冲之间产生干涉图案的干涉仪。 提供了一种控制器，其被配置为基于本地脉冲和远程脉冲之间的干涉图案来计算第一时钟和第二时钟之间的时间延迟。

公开(公告)号：US20200304228A1

公开(公告)日：2020-09-24

申请号：US16359248

申请日：2019-03-20

Applicant: Raytheon Company

Inventor： Bishara Shamee ,  Steven R. Wilkinson

IPC: H04K3/00 ,  H04B10/69 ,  H04B10/50

Abstract: A photonic random signal generator includes an incoherent optical source configured to generate an optical noise signal, a filter configured to generate a filtered optical noise signal using the optical noise signal, a coupler, a photodetector, a filter, and a limiter. The coupler couples the filtered optical noise signal and a delayed version of the filtered optical noise signal to generate a first coupled signal and a second coupled signal. The photodetector generates an output signal representative of a phase difference between the filtered optical noise signal and the delayed version of the filtered optical noise signal using the first coupled signal and the second coupled signal. The filter filters the output signal representative of the phase difference to generate an analog random signal. The limiter thresholds the analog random signal based on a clock signal, to generate a digital random signal.

公开(公告)号：US20190020470A1

公开(公告)日：2019-01-17

申请号：US15667111

申请日：2017-08-02

Applicant: Raytheon Company

Inventor： Bishara Shamee ,  Steven R. Wilkinson ,  Anna M. Johnston

IPC: H04L9/06 ,  H04L9/08 ,  H04L9/30 ,  H03M13/15 ,  H03M13/00

CPC classification number: H04L9/0625 ,  H03M13/03 ,  H03M13/151 ,  H03M13/63 ,  H03M13/6508 ,  H04L9/008 ,  H04L9/065 ,  H04L9/0861 ,  H04L9/0869 ,  H04L9/3026 ,  H04L9/3033 ,  H04L9/3093 ,  H04L2209/34 ,  H04L2209/46

Abstract: Generally discussed herein are systems, devices, and methods for entwined encryption and error correction and/or error detection. An entwined cryptographic encode device can include a memory including data indicating a set of relatively prime, irreducible polynomials stored and indexed thereon, entwined encryption encoding circuitry to receive data, transform the data to a set of data integers modulo respective polynomial integers representative of respective polynomials of the polynomials stored on the memory, and perform a Da Yen weave on the transformed data based on received cipher data, and provide the weaved transformed data to a medium.

公开(公告)号：US09647770B1

公开(公告)日：2017-05-09

申请号：US14921146

申请日：2015-10-23

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Bishara Shamee

IPC: H04B10/00 ,  H04B10/70 ,  H04B10/25 ,  H04B10/54 ,  H04L7/00 ,  H04B10/572

CPC classification number: H04B10/70 ,  H01S5/06226 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/541 ,  H04B10/548 ,  H04B10/572 ,  H04L7/0075

Abstract: A photonic oscillator can produce a multifrequency optical signal having a spectrum that includes regularly spaced spectral lines. A photodetector can convert the multifrequency optical signal to a multifrequency electrical signal having a spectrum that includes the regularly spaced spectral lines. A bandpass filter can attenuate all but one spectral line of the spectrum of the multifrequency electrical signal to form a single-frequency electrical signal having leading/trailing edges that have the same precision as the photonic oscillator. A continuous-wave laser can lock to the multifrequency optical signal and produce a continuous-wave optical signal at a wavelength precisely locked to the photonic oscillator. A data encoder/decoder can modulate/demodulate a data stream onto/from the continuous-wave optical signal at a data rate of the single-frequency electrical signal. The modulated optical signal can be clocked with the leading/trailing edges of the single-frequency electrical signal.

公开(公告)号：US09306727B2

公开(公告)日：2016-04-05

申请号：US14337675

申请日：2014-07-22

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Ulvi Yurtsever

IPC: H04L7/00 ,  H04B7/185

CPC classification number: H04L7/0012 ,  H04B7/18515 ,  H04B7/18517 ,  H04B7/18519 ,  H04W56/00

Abstract: A system and method of synchronizing clocks within a system having a plurality of base stations, wherein each base station includes a frequency locked clock. A fast moving emitter transmits pulses that are received at each base station. A time of arrival for each pulse received by each base station is recorded and the recorded times of arrival are communicated to at least one of the other base stations. The clocks are synchronized as a function of the recorded times of arrival received from each base station.

Abstract translation: 一种在具有多个基站的系统内同步时钟的系统和方法，其中每个基站包括频率锁定时钟。 快速移动发射器发射在每个基站接收的脉冲。 记录每个基站接收到的每个脉冲的到达时间，并将记录的到达时间传送到其他基站中的至少一个。 时钟作为从每个基站接收的记录的到达时间的函数而同步。