公开(公告)号：US20240271936A1

公开(公告)日：2024-08-15

申请号：US18166665

申请日：2023-02-09

Applicant: Honeywell International Inc.

Inventor： Matthew Wade Puckett ,  Jianfeng Wu ,  Steven Tin ,  Tiequn Qiu

IPC: G01C19/66

CPC classification number: G01C19/661

Abstract: Techniques are provided for implementing and using a high quality factor travelling wave resonator configured to propagate a transverse magnetic mode optical signals and suppress transverse electric mode optical signals. The travelling wave resonator may be used in a resonator optical gyroscope.

公开(公告)号：US20240258769A1

公开(公告)日：2024-08-01

申请号：US18162517

申请日：2023-01-31

Applicant: Honeywell International Inc.

Inventor： Matthew Wade Puckett ,  Neal Eldrich Solmeyer ,  Karl D. Nelson ,  Jianfeng Wu ,  Mary Salit

IPC: H01S5/14 ,  H01S3/10 ,  H01S5/10 ,  H01S5/12 ,  H01S5/323

CPC classification number: H01S5/141 ,  H01S3/10092 ,  H01S5/1007 ,  H01S5/12 ,  H01S5/323 ,  H01S5/50

Abstract: A laser device comprises a gain chip that emits light, and a photonics chip optically coupled to the gain chip. The photonics chip comprises a waveguide platform including an input waveguide optically coupled to the gain chip. The input waveguide optical communicates with a cascaded arrangement of waveguide grating structures on the waveguide platform. The grating structures comprise a first grating structure that produces a single resonance frequency within a stopband, and a second grating structure in optical communication with the first grating structure. The second grating structure diffracts a narrowband resonance, overlapping with the stopband of the first grating structure, back toward the gain chip, while passing any light outside of the stopband of the first grating structure out of the waveguide platform. The grating structures cooperate to yield a single resonance frequency that feeds back into the gain chip to produce a self-injection lock for the laser device.

公开(公告)号：US20240184053A1

公开(公告)日：2024-06-06

申请号：US18061695

申请日：2022-12-05

Applicant: Honeywell International Inc.

Inventor： Jianfeng Wu ,  Matthew Wade Puckett ,  Steven Tin ,  Tiequn Qiu

IPC: G02B6/35 ,  G01C19/24 ,  G02B6/293

CPC classification number: G02B6/3596 ,  G01C19/24 ,  G02B6/29338

Abstract: Techniques are provided for implementing and using a travelling wave resonator, comprising planar optical waveguide including at least two stacked cores, to diminish Kerr effect in the travelling wave resonator. The travelling wave resonator may be used in a resonator optical gyroscope.

公开(公告)号：US20240126138A1

公开(公告)日：2024-04-18

申请号：US18045936

申请日：2022-10-12

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： Matthew W. Puckett ,  Chad Hoyt ,  Karl Nelson ,  Jianfeng Wu

IPC: G02F1/365 ,  G02F1/35

CPC classification number: G02F1/365 ,  G02F1/3542 ,  G02F2201/307 ,  G02F2203/56

Abstract: An optical frequency comb generation system includes an optical waveguide portion having a uniform width, a first chirped Bragg grating disposed at one end of the optical waveguide portion and a second chirped Bragg grating disposed at the other end of the optical waveguide portion. The first chirped Bragg grating includes at least a first periodic variation having a first refractive index and a second periodic variation having a second refractive index. The second chirped Bragg grating includes the at least first and second periodic variations. A first cavity associated with a first resonant frequency extends between the first periodic variation of the first chirped Bragg grating and the first periodic variation of the second chirped Bragg grating. A second cavity associated with a second resonant frequency extends between the second periodic variation of the first chirped Bragg grating and the second periodic variation of the second chirped Bragg grating.

公开(公告)号：US11906875B2

公开(公告)日：2024-02-20

申请号：US17814678

申请日：2022-07-25

Applicant: Honeywell International Inc.

Inventor： Matthew Puckett ,  Chad Hoyt ,  Jianfeng Wu ,  Karl Nelson

IPC: G02F1/35

CPC classification number: G02F1/353 ,  G02F2203/56

Abstract: A method may comprise: generating an optical frequency comb; applying a filter in a first configuration to the generated optical frequency comb to select a first frequency of the optical frequency comb, wherein, in the first configuration, the first frequency aligns with a first pass-band of the filter, and a second frequency of the optical frequency comb does not align with a second pass-band of the filter; altering the filter to a second configuration to shift the first pass-band and the second pass-band to a shifted first pass-band and a shifted second pass-band; and applying the altered filter to the generated optical frequency comb to select the second frequency of the optical frequency comb, wherein the second frequency aligns with the shifted second pass-band of the filter, and the first frequency of the optical frequency comb does not align with the shifted first pass-band of the filter.

公开(公告)号：US11506495B2

公开(公告)日：2022-11-22

申请号：US16940223

申请日：2020-07-27

Applicant: Honeywell International Inc.

Inventor： Jianfeng Wu ,  Karl D. Nelson ,  Matthew Wade Puckett ,  Glen A. Sanders ,  Lee K. Strandjord

IPC: G01C19/72 ,  H01S3/10 ,  H01S3/30

Abstract: Systems and methods for an injection locking RFOG are described herein. In certain embodiments, a system includes an optical resonator. The system also includes a laser source configured to launch a first laser for propagating within the optical resonator in a first direction and a second laser for propagating within the optical resonator in a second direction that is opposite to the first direction, wherein the first laser is emitted at a first launch frequency and the second laser is emitted at a second launch frequency. Moreover, the system includes at least one return path that injects a first optical feedback for the first laser and a second optical feedback for the second laser, from the optical resonator, into the laser source, wherein the first and second optical feedbacks respectively lock the first and second launch frequencies to first and second resonance frequencies of the optical resonator.

公开(公告)号：US11476633B2

公开(公告)日：2022-10-18

申请号：US16933537

申请日：2020-07-20

Applicant: Honeywell International Inc.

Inventor： Tiequn Qiu ,  Teresa Marta ,  Jianfeng Wu

IPC: H01S3/081 ,  H01S3/131 ,  H01S3/083 ,  H01S3/094 ,  H01S3/13

Abstract: Systems and methods for ring laser gyroscopes (RLGs) are provided. An RLG includes a traveling-wave resonator cavity with three or more mirrors and a gain medium positioned in the traveling-wave resonator cavity between two of the three or more mirrors. The gain medium is a solid-state gain medium or a nonlinear optical medium. The RLG further includes a first pump laser and a second pump laser to pump the gain medium in different directions and generate first and second lasing signals that traverse the traveling-wave resonator cavity in a opposite directions. The RLG further includes first and second photodetectors to measure levels of the first and second lasing signals. The RLG further includes at least one processor configured to adjust a power level of the first pump laser and/or a power level of the second pump laser based on the measured power levels of the first and second lasing signals.

公开(公告)号：US20220057427A1

公开(公告)日：2022-02-24

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.

公开(公告)号：US20220026211A1

公开(公告)日：2022-01-27

申请号：US16940223

申请日：2020-07-27

Applicant: Honeywell International Inc.

Inventor： Jianfeng Wu ,  Karl D. Nelson ,  Matthew Wade Puckett ,  Glen A. Sanders ,  Lee K. Strandjord

IPC: G01C19/72 ,  H01S3/10 ,  H01S3/30

Abstract: Systems and methods for an injection locking RFOG are described herein. In certain embodiments, a system includes an optical resonator. The system also includes a laser source configured to launch a first laser for propagating within the optical resonator in a first direction and a second laser for propagating within the optical resonator in a second direction that is opposite to the first direction, wherein the first laser is emitted at a first launch frequency and the second laser is emitted at a second launch frequency. Moreover, the system includes at least one return path that injects a first optical feedback for the first laser and a second optical feedback for the second laser, from the optical resonator, into the laser source, wherein the first and second optical feedbacks respectively lock the first and second launch frequencies to first and second resonance frequencies of the optical resonator.

公开(公告)号：US20210055108A1

公开(公告)日：2021-02-25

申请号：US16546115

申请日：2019-08-20

Applicant: Honeywell International Inc.

Inventor： Lee K. Strandjord ,  Glen A. Sanders ,  Jianfeng Wu ,  Tiequn Qiu ,  Marc Smiciklas

IPC: G01C19/72

Abstract: Systems and methods for performing SHD switching for RFOGS are provided herein. A system includes a resonator in which light resonates; at least one laser source that produces first and second optical beams; heterodyne modulators that modulate the first and second optical beams at a heterodyne frequency plus a modulation frequency offset to produce multiple sideband optical beams, wherein the modulation frequency offset has a different sign for the first and second optical beams; a frequency switching controller that alternatingly switches the signs of the modulation frequency offset applied to the first and second optical beams, wherein the heterodyne modulation of the first and second optical beams are on average at the heterodyne frequency; at least one coupler that couples the sideband optical beams into the resonator; a feedback control that detects the sideband optical beams transmitted from the resonator and, in response, adjusts frequencies of the optical beams.