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1. 发明公开

US20240160081A1 POLARIZATION MAINTAINING PARAMETRIC OPTICAL FREQUENCY COMB GENERATOR 审中-公开
公开(公告)号：US20240160081A1
公开(公告)日：2024-05-16
申请号：US17986373
申请日：2022-11-14
申请人： Rockwell Collins, Inc.
发明人： Daniel J. Esman , Ronald D. Esman , Mark A. Laliberte
IPC分类号： G02F1/35 , G02F1/365
CPC分类号： G02F1/3503 , G02F1/365
摘要： A system is described. The system includes HNLF for generating an optical frequency comb and a single mode fiber for reducing a pulse duration of comb. The system includes a FRM to reflect the light in back propagation through the HNLF and the single mode fiber. Perturbations in a state of polarization caused by the HNLF and the single mode fiber are cancelled between the forward propagation and the backward propagation. The optical frequency comb may then be polarization maintaining without an active component such as a polarization controller and a feedback circuit.

2. 发明授权

US10768370B1 Photonic N-to-one single-mode combiner 有权
公开(公告)号：US10768370B1
公开(公告)日：2020-09-08
申请号：US16577721
申请日：2019-09-20
申请人： Rockwell Collins, Inc.
发明人： Ronald D. Esman
IPC分类号： G02B6/028 , G02B6/14 , H04J14/04
摘要： A photonic N-to-one single-mode combiner is disclosed. In embodiments, the combiner receives multiple single-mode photonic inputs (e.g., via single-mode optical fibers) and combines the single-mode inputs into a multi-mode photonic output via photonic lantern. The multi-mode photonic output is converted via high-power, high-speed photodiode into an RF/electrical output which in turn drives an electro-optical modulator, modulating a second optical beam (e.g., a laser generated by a laser emitter of the combiner) to generate a single-mode photonic output signal.

3. 发明授权

US10698097B1 Multi-beam photonic monopulse comparator 有权
公开(公告)号：US10698097B1
公开(公告)日：2020-06-30
申请号：US16512658
申请日：2019-07-16
申请人： Rockwell Collins, Inc.
发明人： Ronald D. Esman
IPC分类号： G01S13/44 , G02F1/21
摘要： A multi-beam photonic monopulse comparator is disclosed. Photonic inputs incorporating M component wavelengths are split into equivalent inputs for each quadrant subarray and array element (e.g., N array elements in each quadrant subarray). Within each array element, the component wavelengths are apodized by attenuators and the apodized input signal modulated by a received inbound RF signal (via broadband Mach-Zehnder electro-optical modulators). The resulting positive-polarity and negative-polarity modulated photonic signals are demultiplexed and each component wavelength time-delayed. Time-delayed wavelength-selective optical delay channels are copied and combined by single mode/multi-mode (SM/MM) couplers into photonic antenna beams and simultaneously generated photonic comparator outputs (elevational difference, sum, azimuthal difference) for each component wavelength. High-speed photodiodes convert the photonic beams and corresponding comparator outputs into RF output signals, from which angle of arrival information for the received inbound RF signals may be calculated.

4. 发明授权

US11770190B1 Multiple-sensitivity optical phase modulator 有权
公开(公告)号：US11770190B1
公开(公告)日：2023-09-26
申请号：US17849087
申请日：2022-06-24
申请人： Rockwell Collins, Inc.
发明人： Daniel J. Esman , Ronald D. Esman , Oliver S. King
IPC分类号： H04B10/2575 , H04B10/556 , G02F1/035
CPC分类号： H04B10/25759 , G02F1/035 , H04B10/5561
摘要： A system and related method for multiple-sensitivity optical phase modulation splits an optical carrier generated by a photonic source into at least two copies and directs the copies through an electro-optical (EO) phase modulator wherein the optical field associated with the optical carrier overlaps with a radio frequency (RF) electrical field associated with a radio frequency (RF) input signal, such that the EO modulator phase-modulates each optical copy according to the RF input signal of interest based on characteristics distinct to each optical copy (e.g., relative strength of, or proximity of the optical carrier to, the overlapping electrical field) that provide for phase modulation of each optical copy at a different sensitivity voltage. The variably modified optical copies are directed to a photonic processor for further signal processing in the optical domain.

5. 发明授权

US11736203B1 Radio frequency (RF) signal processor with photonic local oscillator (LO) phase control 有权
公开(公告)号：US11736203B1
公开(公告)日：2023-08-22
申请号：US17850620
申请日：2022-06-27
申请人： Rockwell Collins, Inc.
发明人： Ronald D. Esman , Daniel J. Esman
IPC分类号： H04B10/61 , H04B10/2575 , H04J14/00 , H04B10/516
CPC分类号： H04B10/613 , H04B10/2575 , H04B10/5161 , H04B10/616 , H04J14/002
摘要： A system and method for radio frequency (RF) signal processing via photonic local oscillator (LO) phase control generates a set of N optical carriers and M sets of control inputs, each control input including an amplitude and/or phase control for the nth carrier. Each nth optical carrier is split into an RF path and M LO paths, the RF path including N electro-optical (EO) modulators for amplitude/phase modulation of each nth carrier per a set of N RF input signals and each mth LO path including a set of N EO modulators for amplitude/phase modulation of each nth carrier per the mth control input. Demodulators generate M in-phase and quadrature (I/Q) balanced optical outputs based on the multiplexed N combined RF optical outputs and each mth set of N combined LO optical outputs. The M I/Q balanced optical outputs are converted to the electrical and then to the digital domain.

6. 发明授权

US11356173B2 Computationally efficient real time photonic cyclic autocorrelation function (CAF) analyzer device 有权
公开(公告)号：US11356173B2
公开(公告)日：2022-06-07
申请号：US17226436
申请日：2021-04-09
申请人： Rockwell Collins, Inc.
发明人： Daniel J. Esman , Ronald D. Esman
IPC分类号： H04B10/2575 , H04B10/079
摘要： A computationally efficient real-time photonic cyclic autocorrelation function (CAF) analysis device and method are disclosed. In embodiments, the CAF analyzer generates a photonic carrier which is converted into upper and lower comb signals (comprising a set of N tones) by upper and lower optical frequency comb generators (OFCG), the lower comb signal offset from the upper. An inbound radio frequency (RF) signal is received and modulates the upper and lower comb signals via amplitude modulation. An optical delay line (e.g., ring resonator) introduces a delay into the modulated lower comb signal. The upper and lower comb signals are demultiplexed into their modulated frequency component and sent to a bank of N coherent I/Q receivers, which generate a slice of the CAF for the received RF signal based on the selected delay.

7. 发明授权

US11294111B1 Cross-polarization single sideband optical modulator system and method 有权
公开(公告)号：US11294111B1
公开(公告)日：2022-04-05
申请号：US16141170
申请日：2018-09-25
申请人： Rockwell Collins, Inc.
发明人： Ronald D. Esman , Mark A. Laliberte
IPC分类号： H04B10/04 , G02B5/20 , G01R33/36 , G02B27/28 , H04B10/50 , H04B10/516
摘要： A photonic processor includes a modulator, an optical filter, and a polarization combiner. The modulator is configured to receive an electronic signal, first optical control signal, and first optical operating signal, the first optical operating signal received from an optical source circuit on a first path having a first length, the first optical control signal received from an optical control circuit on the first path; modulate the first optical operating signal using the electronic signal to provide an intensity-modulated optical operating signal comprising a first optical operating carrier, first sideband, and second sideband; and modulate the first optical control signal using the electronic signal to provide an intensity-modulated control signal comprising a first optical control carrier. The optical filter is configured to extract the first optical operating carrier and first sideband from the intensity-modulated optical operating signal and provide the second sideband and the control carrier.

8. 发明申请

US20220091238A1 Optical Phased Array Controlled RF Phased Array 有权
公开(公告)号：US20220091238A1
公开(公告)日：2022-03-24
申请号：US17024873
申请日：2020-09-18
申请人： Rockwell Collins, Inc.
发明人： Oliver S. King , Ronald D. Esman
IPC分类号： G01S7/481 , H01Q3/38 , G02F1/29 , G02F1/295 , H01Q3/26
摘要： A system may include an optical phased array, a photodiode array, and a radiofrequency (RF) antenna element array. The optical phased array may be configured to: receive a laser signal from a signal laser; and output an optical beam. Each photodiode may be configured to: receive at least a portion of the optical beam and at least a portion of an optical plane wave beam, wherein the optical plane wave beam is formed based at least on a local oscillator (LO) laser that outputs a laser beam having a different wavelength from the signal laser; and output an electronic signal based on the at least the portion of the optical beam and the at least a portion of the optical plane wave beam. The RF antenna element array may be configured to output an RF beam based on received electronic signals from the photodiode array.

9. 发明申请

US20210328669A1 COMPUTATIONALLY EFFICIENT REAL TIME PHOTONIC CYCLIC AUTOCORRELATION FUNCTION (CAF) ANALYZER DEVICE 有权
公开(公告)号：US20210328669A1
公开(公告)日：2021-10-21
申请号：US17226436
申请日：2021-04-09
申请人： Rockwell Collins, Inc.
发明人： Daniel J. Esman , Ronald D. Esman
IPC分类号： H04B10/079
摘要： A computationally efficient real-time photonic cyclic autocorrelation function (CAF) analysis device and method are disclosed. In embodiments, the CAF analyzer generates a photonic carrier which is converted into upper and lower comb signals (comprising a set of N tones) by upper and lower optical frequency comb generators (OFCG), the lower comb signal offset from the upper. An inbound radio frequency (RF) signal is received and modulates the upper and lower comb signals via amplitude modulation. An optical delay line (e.g., ring resonator) introduces a delay into the modulated lower comb signal. The upper and lower comb signals are demultiplexed into their modulated frequency component and sent to a bank of N coherent I/Q receivers, which generate a slice of the CAF for the received RF signal based on the selected delay.

10. 发明授权

US12095511B1 Multiple-sensitivity optical phase modulator 有权
公开(公告)号：US12095511B1
公开(公告)日：2024-09-17
申请号：US17848923
申请日：2022-06-24
申请人： Rockwell Collins, Inc.
发明人： Daniel J. Esman , Ronald D. Esman , Oliver S. King
IPC分类号： H04B10/548
CPC分类号： H04B10/548
摘要： A system and related method for multiple-sensitivity optical phase modulation splits an optical carrier generated by a photonic source into at least two copies and directs the copies (e.g., via optical circulators or polarization rotators) to an electro-optical (EO) phase modulator such that the phase modulator phase-modulates each optical copy according to a received radio frequency (RF) signal of interest based on characteristics distinct to each optical copy (e.g., optical path direction, signal polarization) that provide for phase modulation of each optical copy at a different sensitivity voltage. The variably modified optical copies are directed to a photonic processor for further signal processing in the optical domain.

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