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Nevigation-class cyclic interference type integrated optical gyroscope

An integrated optics and interferometric technology, applied in the direction of steering sensing equipment, etc., can solve the problems of high cost, shorten the length of the optical fiber sensitive coil, etc., achieve the effect of reducing sensitivity, reducing spontaneous radiation noise, and improving signal-to-noise ratio

Inactive Publication Date: 2002-03-06
章燕申
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these technical key points can be solved at present, the cost is relatively high
[0004] On the other hand, the FOG technical solution can easily realize a low-cost optical gyroscope, but the need to shorten the length of the optical fiber sensitive coil has not yet been well solved

Method used

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  • Nevigation-class cyclic interference type integrated optical gyroscope
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  • Nevigation-class cyclic interference type integrated optical gyroscope

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1 is a navigation level circular interference type integrated optical gyroscope (IOG) using an optical fiber SSR module, and its structure is as follows figure 2 As shown, the optical system of this IOG includes a superluminescent light-emitting diode SLD21 in the optical transceiver module, an MIOC module 23 and an optical fiber SSR module with an SOA. The low-coherent light wave emitted by SLD21 is sent to MIOC23 through Y waveguide coupler 22, and then enters optical fiber SSR25 through coupler 24. The light wave is amplified by SOA26 in the SSR and propagates in clockwise and anticlockwise directions. The output signal of the SSR enters the photodetector 27 through the coupler 24 , the MIOC and the coupler 22 .

[0034] The circuit system of this embodiment includes the current source of the light source in the optical transceiver module and the temperature control circuit 28, the signal preprocessing circuit of the photodetector (including the preampli...

Embodiment 2

[0037] Embodiment 2 is a navigation level circular interference type integrated optical gyroscope (IOG) using a micro-optical SSR module, and its structure is as follows image 3 shown. In this IOG, the structure of optical transceiver module and MIOC module is the same as figure 2 The structure is exactly the same, the SSR module adopts the form of micro-optical structure, in which, a micro-optical structure of high reflective mirrors M1, M2 and M3 and half-transparent and half-reflective mirror M4 are set at each of the four corners of the quadrangle to form a sensitive sensor for the Sineck effect. ring, a semiconductor optical amplifier (SOA) is set on the optical path between the two mirrors M2 and M3; it also includes a high reflection mirror M5 arranged in one optical path of the MIOC module and the reflection optical path of M4, and the M4 is located In the other optical path of the MIOC module, M4 and M5 form a coupler 2, which couples the interference signals of the ...

Embodiment 3

[0039] Embodiment 3 is a navigation level circular interference type integrated optical gyroscope (IOG) using optical waveguide SSR, its structure is as follows Figure 4 shown. In this IOG, the optical waveguide is used to replace the optical fiber in Embodiment 1 to form the SSR module, and the rest are the same as figure 2 The structure is exactly the same, it is characterized by miniaturization, and the SSR and SOA of the optical waveguide can be integrated on the same substrate.

[0040] The optical transceiver module of the Y-waveguide coupler that adopts in each above-mentioned embodiment, its structure is as follows Figure 5 As shown in the figure, the SLD31 is welded on the copper heat sink 32, connected to the housing 34 through the semiconductor refrigerator 33, the light wave emitted by the SLD is coupled into a branch of the Y-waveguide coupler 36 through the microlens 35, and in the Y- The other end of the waveguide coupler is coupled with the fiber pigtail 3...

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Abstract

A nevigation-class cyclic interference type integrated optical gyroscope is composed of optical transceiver module, Y-waveguide electro-optical phase modulation module, closed-loop control and signalreader module, and sensing loop module consisting of coupler, optical semiconductor amplifier and Sainaike-effect sensing loop. Said phasew modulation module is bidirectionally connected with said optical transceiver module and sensing loop module. The D / A converter is said optical transceiver module is connected to said closed-loop control and signal reader module. Its advantages include short SSR length, high compatibility, small size, low cost and high reliability.

Description

technical field [0001] The invention belongs to the technical field of sensors and artificial intelligence, in particular to the design of an interference type integrated optical gyroscope. Background technique [0002] Optical gyroscopes, including laser gyroscopes (Ring Laser Gyroscope, RLG) and fiber optic gyroscopes (Fiber Optical Gyroscope, FOG), are suitable for strapdown inertial navigation systems. Compared with traditional electromechanical gyroscopes, they have advantages in miniaturization, low cost and high reliability, so they develop rapidly and gradually replace electromechanical gyroscopes. [0003] The development direction of RLG and FOG is to reduce cost and realize miniaturization. In 1996, the present inventor published the paper "Key Technology of Miniaturized Resonant Optical Angular Velocity Sensor", and proposed a scheme for developing a resonant integrated optical gyroscope (Integrated Optical Gyroscope, IOG). In this scheme, the optical waveguide...

Claims

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Application Information

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IPC IPC(8): G01C19/58
Inventor 章燕申
Owner 章燕申
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