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公开(公告)号：US20230238773A1
公开(公告)日：2023-07-27
申请号：US17581692
申请日：2022-01-21
Applicant: Honeywell International Inc.
Inventor： Matthew Wade Puckett , Jianfeng Wu , Karl D. Nelson , Chad Hoyt
IPC: H01S5/0683 , G02F1/01 , H01S5/00 , H01S5/40 , H03K5/1252
CPC classification number: H01S5/0683 , G02F1/0102 , H01S5/0085 , H01S5/4012 , H03K5/1252 , G02F2203/56 , H01S5/12
Abstract: Systems and methods for a tunable RF synthesizer based on offset optical frequency combs is provided herein. An exemplary system includes two lasers, a first laser generating a first laser output and a second laser generating a second laser output; and a coupler that receives the first and second laser outputs. Further, the system includes a resonator having first and second sections coupled to one another, the coupler coupling the first and second laser outputs into the resonator; a splitter that couples the first section to the second section, the splitter splitting a first proportion of the first laser output and a second proportion of the second laser output onto different paths within the resonator; and a controller that controls the splitter to change a size of the first proportion in relation to the first laser and the second proportion in relation to the second laser.
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公开(公告)号：US11630123B2
公开(公告)日：2023-04-18
申请号：US16996366
申请日：2020-08-18
Applicant: Honeywell International Inc.
Inventor： Matthew Puckett , Jianfeng Wu , Neil Krueger , Steven Tin
IPC: G01P15/093 , G01P15/097
Abstract: This disclosure is related to devices, systems, and techniques for determining an acceleration. For example, an accelerometer system includes a resonator and a light-emitting device configured to generate, based on an error signal, an optical signal. Additionally, the accelerometer includes a modulator configured to receive the optical signal, generate a modulated optical signal responsive to receiving the optical signal, and output the modulated optical signal to the resonator. A photoreceiver receives a passed optical signal from the resonator, where the passed optical signal indicates a resonance frequency of the resonator. Additionally, the photoreceiver receives a reflected optical signal from the resonator. The photoreceiver generates one or more electrical signals based on the passed optical signal and the reflected optical signal. Processing circuitry generates the error signal and determines the acceleration based on the one or more electrical signals.
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公开(公告)号：US11442148B2
公开(公告)日：2022-09-13
申请号：US16569581
申请日：2019-09-12
Applicant: Honeywell International Inc.
Inventor： Steven Tin , Chad Fertig , Matthew Wade Puckett , Neil A. Krueger , Jianfeng Wu
Abstract: A sensor system comprises a pulsed light source, and a passive sensor head chip in communication with the light source. The sensor head chip includes a first photonics substrate, a transmitting optical component on the first photonics substrate and configured to couple a pulse, transmitted through a first optical fiber from the light source, into a region of interest; and a receiving optical component on the first photonics substrate and configured to couple backscattered light, received from the region of interest, into a second optical fiber. A signal processing chip communicates with the sensor head chip and light source. The signal processing chip includes a second photonics substrate and comprises a passive optical filter array that receives the backscattered light from the second optical fiber. The filter array includes notch filters in communication with each other and operative for frequency selection; and optical detectors respectively coupled to the notch filters.
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公开(公告)号：US20210384695A1
公开(公告)日：2021-12-09
申请号：US16892016
申请日：2020-06-03
Applicant: Honeywell International Inc.
Inventor： Matthew Wade Puckett , Karl D. Nelson , Jianfeng Wu
Abstract: Systems and methods for a self-injection locked SBS laser are provided herein. In certain embodiments, a system includes a pump laser source providing a pump laser; an SBS resonator receiving the pump laser through a first port and scattering some of the pump laser to provide an SBS laser through the first port, wherein a frequency shift of Brillouin scattering within the SBS resonator is an integer multiple of a free-spectral range for the SBS resonator; a filter receiving the pump laser on a first filter port and the SBS laser on a second filter port, wherein the pump laser is output through the second filter port and the SBS laser is output through a drop port; and a pump laser path coupling the output pump laser into the pump laser source, wherein a frequency of the pump laser becomes locked to a resonance frequency of the SBS resonator.
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公开(公告)号：US20210333106A1
公开(公告)日：2021-10-28
申请号：US16858272
申请日：2020-04-24
Applicant: Honeywell International Inc.
Inventor： Jianfeng Wu , Matthew Wade Puckett , Karl D. Nelson
Abstract: A method for reducing or eliminating bias instability in a SBS laser gyroscope comprises introducing a first pump signal propagating in a CW direction, and a second pump signal propagating in a CCW direction in a resonator; generating a CCW first-order SBS signal and a CW first-order SBS signal in the resonator; increasing a power level of the first pump signal above a threshold level such that the CW first-order SBS signal generates a CCW second-order SBS signal; and increasing a power level of the second pump signal above the threshold level such that the CCW first-order SBS signal generates a CW second-order SBS signal. Above the threshold level, an intensity fluctuation of the first-order SBS signals disappear and their DC power are clamped at substantially the same power level. A Kerr effect bias instability of the SBS laser gyroscope is reduced or eliminated by the clamped first-order SBS signals.
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Patent Agency Ranking
公开(公告)号：US11079233B2
公开(公告)日：2021-08-03
申请号：US16575116
申请日：2019-09-18
Applicant: Honeywell International Inc.
Inventor： Jianfeng Wu , Matthew Wade Puckett , Steven Tin
Abstract: A stimulated Brillouin scattering gyroscope is provided. A pump laser generates continuous wave (CW) energy that travels through at least one bus waveguide to a waveguide resonator. A reflector is positioned within the waveguide resonator. The reflector is configured to pass at least some of the CW energy in a first direction and reflect at least some stimulated Brillouin scattering (SBS) energy in a second direction. A first detector is in operational communication with the at least one bus waveguide to detect CW energy. An output of the first detector used to at least adjust a pump laser frequency of the pump laser. A second detector is also in operational communication with the at least one bus waveguide. The second detector is used to determine phase shifts in detected SBS energy to determine at least rotation.
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公开(公告)号：US10534136B1
公开(公告)日：2020-01-14
申请号：US16223548
申请日：2018-12-18
Applicant: Honeywell International Inc.
Inventor： Matthew Wade Puckett , Jianfeng Wu , Neil A. Krueger
Abstract: An optical coupler comprises a waveguide structure including a first waveguide layer having proximal and distal ends, the first waveguide layer including a first pair of waveguides that extend from the proximal end along a first portion, wherein the first pair of waveguides each widen along a second portion such that the first pair of waveguides merge into a single waveguide. A second waveguide layer is separated from the first waveguide layer, with the second waveguide layer having proximal and distal ends, the second waveguide layer including a second pair of waveguides that extend from the proximal end of the second waveguide layer along a first portion of the second waveguide layer, wherein the second pair of waveguides each narrow along a second portion of the second waveguide layer to separate distal tips. The waveguide structure matches an integrated photonics mode to a fiber mode supported by an optical fiber.
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公开(公告)号：US10365107B2
公开(公告)日：2019-07-30
申请号：US15668676
申请日：2017-08-03
Applicant: Honeywell International Inc.
Inventor： Glen A. Sanders , Marc Smiciklas , Tiequn Qiu , Jianfeng Wu , Lee K. Strandjord
Abstract: Systems and methods for reducing polarization-related bias errors in RFOGS are described herein. In certain implementations, an RFOG system includes a fiber optic resonator, one or more laser sources, wherein light from the laser sources launches first and second optical beams into the fiber optic resonator in opposite directions, and an electro-optically tunable devices in the resonator path configured to modulate the phase difference between polarization components in the first and second optical beams as the optical beams propagate within the fiber optic resonator. The system further includes at least one photodetector, wherein the polarization components of the first and second optical beams are incident on the photodetector, wherein the at least one photodetector provides an electrical signal, and at least one processing unit configured to receive the electrical signal and calculate a rotation rate for the RFOG and provide a drive signal for the electro-optically tunable device.
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公开(公告)号：US20180358772A1
公开(公告)日：2018-12-13
申请号：US15618833
申请日：2017-06-09
Applicant: Honeywell International Inc.
Inventor： Matthew Wade Puckett , Karl D. Nelson , Jianfeng Wu
CPC classification number: H01S3/0675 , G01C19/66 , G01C19/661 , G01C19/72 , G01C19/721 , G01C19/727 , H01S3/0078 , H01S3/06791 , H01S3/10092 , H01S3/1303 , H01S3/1305 , H01S3/302
Abstract: An apparatus is provided. The apparatus comprises: an optical resonator including a surface; wherein a Bragg grating is formed at least part of the surface of the optical resonator; and wherein the Bragg grating has a Bragg frequency substantially equal to a center frequency of an Nth order Brillouin gain region capable of generating an Nth order Stokes signal.
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公开(公告)号：US20180081113A1
公开(公告)日：2018-03-22
申请号：US15591836
申请日：2017-05-10
Applicant: Honeywell International Inc.
Inventor： Matthew Wade Puckett , Jianfeng Wu , Mary Salit , Tiequn Qiu
Abstract: An acousto-optic waveguide device comprises a substrate comprising a first material having a first refractive index and a first acoustic velocity; a cladding layer over the substrate, the cladding layer comprising a second material having a second refractive index that is distinct from the first refractive index, the second material having a second acoustic velocity that is distinct from the first acoustic velocity; and an optical core surrounded by the cladding layer, the optical core comprising a third material having a third refractive index that is higher that the first refractive index and the second refractive index, the third material having a third acoustic velocity that is distinct from the first acoustic velocity and the second acoustic velocity. The cladding layer that surrounds the optical core has a thickness configured to substantially confine acoustic waves to the cladding layer when an optical signal propagates through the optical core.
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