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Integrated optical network chip used for triaxial interference type optical fibre gyro

A technology of fiber optic gyroscope and integrated optics, which is applied in the coupling of optical waveguide, Sagnac effect gyroscope, etc., can solve the problem of increasing the area of ​​the optical system, and achieve volume reduction, low loss, good consistency and repeatability line effect

Inactive Publication Date: 2009-11-04
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

If the system includes four such couplers, this will greatly increase the area of ​​the optical system

Method used

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  • Integrated optical network chip used for triaxial interference type optical fibre gyro
  • Integrated optical network chip used for triaxial interference type optical fibre gyro
  • Integrated optical network chip used for triaxial interference type optical fibre gyro

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Embodiment Construction

[0017] Such as image 3 As shown, the integrated optical network chip for three-axis interferometric fiber optic gyroscope includes buried low-loss glass waveguide, 3*3 coupler 2, the first integrated 2*2 coupler 3, the second integrated 2*2 coupler 4, the third integrated 2*2 coupler 5, a 3*3 coupler 2 is integrated on the buried low-loss glass waveguide, and the three output ends of the 3*3 coupler are respectively connected with the first integrated 2*2 The coupler 3-incidence end, the second integrated 2*2 coupler 4-incidence end, and the third integrated 2*2 coupler 5-incidence end are connected. The integrated optical network chip is coupled with an external optical module through a pigtail to form the optical system of the gyroscope.

[0018] The 3*3 coupler 2, the first integrated 2*2 coupler 3, the second integrated 2*2 coupler 4, and the third integrated 2*2 coupler 5 adopt a waveguide Y branch structure.

[0019] Such as Figure 4 As shown, the light emitted by t...

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Abstract

The invention discloses an integrated optical network chip used for a triaxial interference type optical fibre gyro, comprising a buried low-loss glass waveguide, a 3*3 coupler, a first integrated 2*2 coupler, a second integrated 2*2 coupler and a third integrated 2*2 coupler; the third integrated 2*2 coupler is integrated on the buried low-loss glass waveguide; and three exit ends of the 3*3 coupler is respectively connected with an incident end of the first integrated 2*2 coupler, an incident end of the second integrated 2*2 coupler and an incident end of the third integrated 2*2 coupler. Compared with the traditional triaxial interference type optical fibre gyro system using four independent couplers, the integrated optical network chip greatly reduces the volume of the triaxial interference type optical fibre gyro system and is beneficial to miniaturization and engineering of the triaxial interference type optical fibre gyro.

Description

technical field [0001] The invention relates to an interference gyroscope, in particular to an integrated optical network chip for a three-axis interference optical fiber gyroscope. Background technique [0002] The interferometric fiber optic gyroscope is a high-precision inertial sensor device that uses the optical Sagnac effect to detect rotation. It is an important sensor for measuring angular velocity, not only in aircraft navigation, but also in spacecraft guidance, satellite positioning, car orientation, intelligent robots, astronomical telescopes and many other aspects. At this stage, our country is mainly committed to the engineering and practical research of gyroscopes. The research of the three-axis interferometric fiber optic gyroscope has become the top priority, because the three-axis interferometric fiber optic gyroscope can determine the motion posture of the object in space (X axis, Y axis, Z axis). In order to make the gyroscope meet the practical require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72G02B6/28
Inventor 周柯江张大茂杨建义
Owner ZHEJIANG UNIV
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