公开(公告)号：US10700700B1

公开(公告)日：2020-06-30

申请号：US16359234

申请日：2019-03-20

Applicant: Raytheon Company

Inventor： Bishara Shamee ,  Steven R. Wilkinson

IPC: H03M1/00 ,  H03M3/00 ,  G02F7/00 ,  H03M1/36

Abstract: A distributive photonic monobit analog-to-digital converter includes a plurality of signal processing chains configured to receive a corresponding plurality of analog input electrical signals. Each processing chain includes an incoherent optical source configured to generate an optical noise signal, an optical modulator configured to modulate an analog input electrical signal of the plurality of analog input electrical signals onto an input optical signal to generate an optical modulated signal, a coupler configured to couple the optical modulated signal with the optical noise signal to generate a coupled signal, a photodetector configured to generate a phase difference between the optical modulated signal and the optical noise signal using the coupled signal, and a limiter configured to output a decision signal based on the phase difference and using a clock signal. A multi-phase clock generator is configured to generate the clock signal for each of the plurality of signal processing chains.

公开(公告)号：US10135541B1

公开(公告)日：2018-11-20

申请号：US15658048

申请日：2017-07-24

Applicant: Raytheon Company

Inventor： Bishara Shamee ,  Steven R. Wilkinson ,  Makan Mohageg

IPC: H03M1/00 ,  H04B10/516 ,  H04B1/00

Abstract: An analog-to-digital converter can produce a digital signal representative of an analog input electrical signal. An optical amplitude modulator can modulate an input optical pulse train using the analog input electrical signal to produce a first modulated optical pulse train. An optical splitter can split the first modulated optical pulse train into a plurality of modulated optical pulse trains. A plurality of detectors can convert the plurality of modulated optical pulse trains into respective modulated voltage pulse trains. A plurality of comparators and a decoder, arranged in a flash converter topology, can receive the modulated voltage pulse trains and output the digital signal representative of the analog input electrical signal using a timing reference derived from the input optical pulse train. Using a relatively high-precision input optical pulse train, such as a Kerr Comb, can produce a relatively high-accuracy analog-to-digital converter.

公开(公告)号：US20170117970A1

公开(公告)日：2017-04-27

申请号：US14921146

申请日：2015-10-23

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Bishara Shamee

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

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：US08836405B2

公开(公告)日：2014-09-16

申请号：US13938848

申请日：2013-07-10

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Neil R. Nelson

IPC: H03K5/08 ,  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：US10833768B2

公开(公告)日：2020-11-10

申请号：US16359263

申请日：2019-03-20

Applicant: Raytheon Company

Inventor： Bishara Shamee ,  Steven R. Wilkinson

IPC: H04B10/556 ,  H04B10/61 ,  H04B10/2507

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：US10727862B1

公开(公告)日：2020-07-28

申请号：US16359229

申请日：2019-03-20

Applicant: Raytheon Company

Inventor： Bishara Shamee ,  Steven R. Wilkinson

IPC: H03M1/00 ,  H03M3/00 ,  G02F7/00 ,  H03M1/36

Abstract: A photonic monobit analog-to-digital converter (ADC) includes an incoherent optical source configured to generate an optical noise signal, an optical modulator, at least one coupler, a photodetector, a limiter, and a DSP. The optical modulator is configured to modulate an input optical signal using an analog input electrical signal to generate an optical modulated signal. The coupler is configured to couple the optical modulated signal with the optical noise signal to generate at least one coupled signal. The photodetector is configured to generate a phase difference between the optical modulated signal and the optical noise signal using the at least one coupled signal. The limiter is configured to generate a decision signal based on the phase difference, and the DSP is configured to output a digital signal representative of the analog input electrical signal based on the decision signal.

公开(公告)号：US10333698B2

公开(公告)日：2019-06-25

申请号：US15667111

申请日：2017-08-02

Applicant: Raytheon Company

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

IPC: H04L9/28 ,  H04L29/06 ,  H03M13/00 ,  H04L9/06 ,  H03M13/15 ,  H04L9/08 ,  H04L9/30 ,  H04L9/00

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：US09647827B1

公开(公告)日：2017-05-09

申请号：US14921157

申请日：2015-10-23

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Bishara Shamee

IPC: H04B10/00 ,  H04L7/00 ,  H04L7/08

CPC classification number: G01S3/00 ,  G02F7/00 ,  H01S3/1303 ,  H01S3/1305 ,  H01S3/1307 ,  H03K3/42 ,  H03K5/13 ,  H03M1/0624 ,  H03M1/0836 ,  H03M1/1215 ,  H03M1/662

Abstract: An apparatus comprises a photonic oscillator circuit configured to generate optical signals that are separated by a uniform delay; radio frequency (RF) generating circuitry configured to receive the optical signals and produce a series of reference clock signals having a same clock signal frequency, wherein each reference clock signal in the series includes a uniform delay from a previous clock signal in the series; and a plurality of analog-to-digital converter (ADC) circuits, wherein an ADC circuit includes a signal input to directly receive an RF input signal that is continuous in time and amplitude, and a clock input to receive a reference clock signal of the repeating series of reference clock signals, wherein the ADC circuits are configured to sample a RF input signal at the frequency of the reference clock signal with the uniform delay to sample interleaved digital values representing the RF signal.

公开(公告)号：US09577825B2

公开(公告)日：2017-02-21

申请号：US14337688

申请日：2014-07-22

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Ulvi Yurtsever

IPC: H04L9/08

CPC classification number: H04L9/0858 ,  H04L9/0852 ,  H04L9/0855 ,  H04L2209/24 ,  H04L2209/34

Abstract: A system and method for distributing a quantum key from a first party to a second party. A first node is connected to a public channel, wherein the first node includes a pulse position modulation encoder connected to a quantum channel. A second node is connected to the public channel, wherein the second node includes a pulse position modulation decoder connected to the quantum channel. The pulse position modulation encoder encodes quantum states |0> and |1>, and transmits the encoded quantum states from the first node to the second node via the quantum channel. Quantum state |1> is encoded as |1>≡(|t1>+|t2>)/√{square root over (2)}.

Abstract translation: 一种用于将量子密钥从第一方分发到第二方的系统和方法。 第一节点连接到公共信道，其中第一节点包括连接到量子信道的脉冲位置调制编码器。 第二节点连接到公共信道，其中第二节点包括连接到量子信道的脉冲位置调制解码器。 脉冲位置调制编码器编码量子态| 0>和| 1>，并且经由量子通道将编码的量子态从第一节点传送到第二节点。 量子态| 1>被编码为| 1>≡（| t1> + | t2>）/√{平方根超过（2）}。

公开(公告)号：US20140035687A1

公开(公告)日：2014-02-06

申请号：US14050468

申请日：2013-10-10

Applicant: Raytheon Company

Inventor： Steven R. Wilkinson ,  Matthew T. Cashen ,  Todd O. Clatterbuck

IPC: H03L7/26

CPC classification number: H03L7/26 ,  G04F5/14 ,  G04F13/02 ,  G04G7/00 ,  G04G7/02 ,  H01S3/1303 ,  H01S3/1304 ,  H01S3/1305 ,  H01S3/2383

Abstract: A system for distributing a reference oscillator signal includes a clock having a reference oscillator and a femtosecond laser stabilized by the reference oscillator. The system also includes at least one beamsplitter configured to split the femtosecond laser. The system further includes one or more remote nodes that are spaced from the clock. The remote nodes are configured to generate reference signals based on the split femtosecond laser.

Abstract translation: 用于分配参考振荡器信号的系统包括具有参考振荡器和由参考振荡器稳定的飞秒激光器的时钟。 该系统还包括被配置为分裂飞秒激光的至少一个分束器。 该系统还包括与时钟间隔开的一个或多个远程节点。 远程节点被配置为基于分裂飞秒激光产生参考信号。