CN-117629171-B - Optical transceiver chip for interferometric fiber optic gyroscope and interferometric fiber optic gyroscope

CN117629171BCN 117629171 BCN117629171 BCN 117629171BCN-117629171-B

Abstract

The present disclosure provides an optical transceiver chip for an interferometric fiber optic gyroscope and an interferometric fiber optic gyroscope. The optical transceiver chip includes an on-chip micro-ring resonator including a nonlinear medium and configured to be capable of coupling to and receiving a pump light signal from a pump light source and generating an incoherent wide-spectrum optical frequency comb signal from the pump light signal based on a third-order nonlinear effect of the nonlinear medium, an optical fiber coupling device configured to be coupled to the on-chip micro-ring resonator and to receive the incoherent wide-spectrum optical frequency comb signal, the optical fiber coupling device further configured to be capable of coupling to an inductive optical fiber of an interferometric optical fiber gyroscope and to provide the incoherent wide-spectrum optical frequency comb signal to and receive a return light signal from the inductive optical fiber of the interferometric optical fiber gyroscope, and a photodetection device configured to be coupled to the optical fiber coupling device, receive the return light signal and to detect the interference light signal based on interference between the return light signals.

Inventors

LU ZHIZHOU
FU HONGMIN
LIU ZUWEN
ZHOU SHUANG
JIN LI

Assignees

联合微电子中心有限责任公司

Dates

Publication Date: 20260508
Application Date: 20220811

Claims (13)

1. An optical transceiver chip for an interferometric fiber-optic gyroscope, comprising: An on-chip micro-ring resonator comprising a nonlinear medium and configured to be capable of coupling to and receiving a pump light signal from a pump light source and generating a non-coherent broad spectrum optical frequency comb signal from the pump light signal based on a third order nonlinear effect of the nonlinear medium; an optical fiber coupling device configured to couple to the on-chip micro-ring resonator and receive the incoherent wide spectrum optical frequency comb signal, the optical fiber coupling device further configured to couple to a sensing fiber of the interferometric fiber optic gyroscope and to provide the incoherent wide spectrum optical frequency comb signal to and receive the return optical signal from the sensing fiber of the interferometric fiber optic gyroscope, and And a photodetection device configured to be coupled to the optical fiber coupling device, receive the return optical signals, and detect the interference optical signals based on interference between the return optical signals.
2. The optical transceiver chip of claim 1, further comprising a phase modulation device coupled between the pump light source and the on-chip micro-ring resonator, configured to receive the back-scattered pump light signal from the on-chip micro-ring resonator, adjust the phase of the back-scattered pump light signal and provide the phase-modulated pump light signal to the pump light source, thereby producing a self-injection phase lock between the pump light source and the on-chip micro-ring resonator.
3. The optical transceiver chip of claim 1, wherein the frequency of the pump optical signal can be adjusted to match the resonance peak of the on-chip micro-ring resonator.
4. The optical transceiver chip of claim 1, wherein the on-chip micro-ring resonator further has micro-ring modulation means for controlling the position of a resonance peak of the on-chip micro-ring resonator.
5. The optical transceiver chip of claim 4, wherein the micro-ring modulation device comprises a heating element, a piezoelectric element, and a semiconductor PIN junction.
6. The optical transceiver chip of claim 1, further comprising a power distribution device configured to couple to the on-chip micro-ring resonator and receive the incoherent wide spectrum optical frequency comb signal, and a power meter configured to distribute the incoherent optical frequency comb signal to the optical fiber coupling device and the power meter, the power meter configured to couple to the power distribution device and measure the power of the incoherent wide spectrum optical frequency comb signal.
7. The optical transceiver chip of claim 1, further comprising polarization control means configured to be coupled between the on-chip micro-ring resonator and the optical fiber coupling means and to control polarization of the incoherent wide spectrum optical frequency comb signal.
8. The optical transceiver chip of claim 1, wherein the on-chip micro-ring resonator comprises a straight waveguide and a micro-ring resonator coupled to each other.
9. The optical transceiver chip of claim 1, further comprising an on-chip laser as a pump light source.
10. The optical transceiver chip of claim 1, wherein the on-chip laser and the on-chip micro-ring resonator are integrated into one chip by semiconductor hetero-integration.
11. The optical transceiver chip of claim 1, wherein the third-order nonlinear effect comprises at least one of a self-phase modulation effect, a cross-phase modulation effect, a four-wave mixing effect, and a modulation instability effect.
12. The optical transceiver chip of claim 1, further comprising a light source coupling device configured to couple between the pump light source and the on-chip micro-ring resonator and to couple pump light from the pump light source to the on-chip micro-ring resonator.
13. An interferometric fiber optic gyroscope, comprising: the optical transceiver chip according to any one of claims 1 to 12, and Sensing optical fiber.

Description

Optical transceiver chip for interferometric fiber optic gyroscope and interferometric fiber optic gyroscope Technical Field The present disclosure relates to an optical transceiver chip for an interferometric fiber optic gyroscope and a fiber optic gyroscope. Background The fiber optic gyroscope is used as an all-solid-state instrument, has no moving parts or abrasion parts, and has the characteristics of low cost, long service life, wide application coverage, electromagnetic interference resistance, no drift caused by acceleration and the like. Therefore, the optical fiber gyroscope gradually replaces the traditional electromechanical gyroscope and the expensive laser gyroscope, and becomes a mainstream scheme for manufacturing the gyroscope. Currently, the optical fiber gyroscope has a development trend of miniaturization and integration. In addition, in order to improve the accuracy of the optical gyroscope, the power of the light source is also required. In order to cope with this trend, it is necessary to provide a light source system for miniaturization and integration of the optical fiber gyroscope and having high power. Disclosure of Invention The invention provides an optical transceiver chip for an interferometric fiber optic gyroscope and the interferometric fiber optic gyroscope, which can be miniaturized and integrated and have high power. One aspect of the invention relates to an optical transceiver chip for an interferometric fiber optic gyroscope, comprising an on-chip micro-ring resonator comprising a nonlinear medium and configured to be coupled to and receive a pump light signal from a pump light source and to generate an incoherent wide spectrum optical frequency comb signal from the pump light signal based on a third order nonlinear effect of the nonlinear medium, an optical fiber coupling device configured to be coupled to the on-chip micro-ring resonator and to receive the incoherent wide spectrum optical frequency comb signal, the optical fiber coupling device further configured to be coupled to an inductive fiber of the interferometric fiber optic gyroscope and to provide the incoherent wide spectrum optical frequency comb signal to and receive a return light signal from the inductive fiber of the interferometric fiber optic gyroscope, and a photodetection device configured to be coupled to the optical fiber coupling device, to receive the return light signal and to detect the interference light signal based on interference between the return light signals. Another aspect of the present disclosure relates to an interferometric fiber-optic gyroscope including an optical transceiver chip as described above and an inductive fiber. Drawings The foregoing and other objects and advantages of the disclosure are further described below in connection with the following detailed description of the embodiments, with reference to the accompanying drawings. In the drawings, the same or corresponding technical features or components will be denoted by the same or corresponding reference numerals. Fig. 1 shows a schematic composition diagram of a fiber optic gyroscope according to an embodiment of the present disclosure. Fig. 2 is a real-time plot of a broad spectrum incoherent optical frequency comb signal produced in accordance with an embodiment of the present disclosure. Fig. 3 is an average time integral plot of a broad spectrum incoherent optical frequency comb signal produced in accordance with an embodiment of the present disclosure. Detailed Description The following detailed description is made with reference to the accompanying drawings and is provided to assist in a comprehensive understanding of various example embodiments of the disclosure. The following description includes various details to aid in understanding, but these are to be considered merely examples and are not intended to limit the disclosure, which is defined by the appended claims and their equivalents. The words and phrases used in the following description are only intended to provide a clear and consistent understanding of the present disclosure. In addition, descriptions of well-known structures, functions and configurations may be omitted for clarity and conciseness. Those of ordinary skill in the art will recognize that various changes and modifications of the examples described herein can be made without departing from the scope of the disclosure. In the integrated fiber optic gyroscope system of the related art, an Amplified Spontaneous Emission (ASE) light source or a super-radiation light emitting diode (SLD) light source is mostly employed. However, ASE light sources require external erbium-doped fibers, wavelength Division Multiplexers (WDM), mirrors, optical filters, and other devices, and the system is complex, which is not beneficial to miniaturization and integration. In addition, the SLD light source power is lower, usually only 2mW, and the signal to noise ratio is lower, which is unfavorable for imp