Optical fiber ring and assembly testing method thereof

Abstract

The invention discloses an optical fiber ring and an assembly testing method thereof. According to the optical fiber ring and the assembly testing method thereof, performance testing of optical path assemblies of different levels can be achieved, disturbance of work of an incubator to an optical path can be reduced, the testing accuracy of the optical fiber ring is improved, and the optical fiber ring and the assembly testing method have practical value in production of optical fiber gyroscopes. According to the optical fiber ring and the assembly testing method thereof provided by the invention, performance testing of different levels of optical path assemblies can be realized, disturbance of work of an incubator to an optical path can be reduced, and the testing accuracy of the optical fiber ring is improved.

Description

Technical Field

[0001] This invention belongs to the field of optical fiber technology, specifically a testing method for optical fiber rings and their components. Background Technology

[0002] A fiber optic gyroscope is an angular rate sensor based on the Sagnac effect. Its basic principles and components are described in [link to relevant documentation]. Figure 1 As shown, the fiber optic ring is the core component in a fiber optic gyroscope used to sense angular rate. It is susceptible to the Shupe effect caused by changes in ambient temperature, leading to zero-point drift. To reduce the Shupe effect, fiber optic rings are primarily wound using a four-pole symmetrical winding method. For gyroscopes with higher precision requirements, eight-pole or sixteen-pole symmetrical winding methods are used. However, regardless of the winding method, tension fluctuations and uneven fiber arrangement still exist during the winding process, and the fiber optic ring will still be affected by temperature, resulting in the Shupe effect and reducing the accuracy of the fiber optic gyroscope. Therefore, to improve the yield rate of fiber optic gyroscope production, accurate testing of the fiber optic ring performance is necessary.

[0003] Current methods for testing fiber optic ring performance include whole-system testing, which encompasses the combined results of all optical components and circuit boards. However, it cannot definitively determine whether a failed test result is caused by the fiber optic ring. Furthermore, replacing the fiber optic ring after gyroscope assembly is labor-intensive and inefficient. Testing methods that assemble the optical path in a loosely connected state suffer from low pass rates due to significant disturbances during chamber operation, failing to accurately reflect the fiber optic ring's performance. Additionally, this method cannot test components assembled from fiber optic rings, Y-waveguides, and couplers. The purpose of this invention is to improve the efficiency and accuracy of fiber optic ring performance testing. Summary of the Invention

[0004] Currently, to improve the pass rate of fiber optic gyroscopes, there are two main practices for performance testing of fiber optic rings. One method is to assemble the fiber optic ring into a gyroscope and then place the gyroscope in a temperature chamber before curing for temperature performance testing. The second method is to assemble the optical path in a diffused state and then place the fiber optic ring separately in a temperature chamber for temperature performance testing.

[0005] For different levels of optical path components, design optical path detection systems, such as Figure 2As shown. The detection system consists of a light source, coupler 1, coupler 2, Y-waveguide 1, detector 1, detector 2, information processing circuit, constant current source drive and temperature control circuit, and a test computer. When testing the fiber optic ring alone, fiber optic ring 1 is placed in the test box. The pigtail of fiber optic ring 1 is fused with the pigtail of Y-waveguide 1 and then placed in a U-shaped groove after being protected by a PTFE sleeve. The U-shaped groove isolates the fiber optic from the temperature chamber. When testing the assembly consisting of fiber optic ring and Y-waveguide, fiber optic ring 2 and Y-waveguide 2 are placed in the test box. The pigtail of Y-waveguide 2 is fused with the pigtail of coupler 2 and then placed in a U-shaped groove after being protected by a PTFE sleeve. The U-shaped groove isolates the fiber optic from the temperature chamber. When testing the assembly consisting of fiber optic ring, Y-waveguide, and coupler, fiber optic ring 3, Y-waveguide 3, and coupler 3 are placed in the test box. The pigtail of coupler 3 is fused with coupler 1 and detector 2 respectively and then placed in a U-shaped groove after being protected by a PTFE sleeve. The U-shaped groove isolates the fiber optic from the temperature chamber.

[0006] The fiber optic ring and its component testing method provided by this invention can realize the performance testing of optical path components at different levels, reduce the disturbance to the optical path caused by the operation of the temperature chamber, improve the testing accuracy of the fiber optic ring, and has practical value in the production of fiber optic gyroscopes.

[0007] The fiber optic ring and its component testing method provided by this invention can realize the performance testing of optical path components at different levels, reduce the disturbance to the optical path caused by the operation of the temperature chamber, and improve the testing accuracy of the fiber optic ring.

[0008] The beneficial effects of this invention are as follows:

[0009] The fiber optic ring and its component testing method provided by this invention can realize the performance testing of optical path components at different levels, reduce the disturbance to the optical path caused by the operation of the temperature chamber, improve the testing accuracy of the fiber optic ring, and has practical value in the production of fiber optic gyroscopes.

[0010] The fiber optic ring and its component testing method provided by this invention can realize the performance testing of optical path components at different levels, reduce the disturbance to the optical path caused by the operation of the temperature chamber, and improve the testing accuracy of the fiber optic ring. Attached Figure Description

[0011] Figure 1 The working principle of fiber optic gyroscopes;

[0012] Figure 2 Optical path detection system. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments in this specification, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this document. Specific Implementation Example 1:

[0015] Currently, to improve the pass rate of fiber optic gyroscopes, there are two main practices for performance testing of fiber optic rings. One method is to assemble the fiber optic ring into a gyroscope and then place the gyroscope in a temperature chamber before curing for temperature performance testing. The second method is to assemble the optical path in a diffused state and then place the fiber optic ring separately in a temperature chamber for temperature performance testing.

[0016] For different levels of optical path components, design optical path detection systems, such as Figure 2 As shown. The detection system consists of a light source, coupler 1, coupler 2, Y-waveguide 1, detector 1, detector 2, information processing circuit, constant current source drive and temperature control circuit, and a test computer. When testing the fiber optic ring alone, fiber optic ring 1 is placed in the test box. The pigtail of fiber optic ring 1 is fused with the pigtail of Y-waveguide 1 and then placed in a U-shaped groove after being protected by a PTFE sleeve. The U-shaped groove isolates the fiber optic from the temperature chamber. When testing the assembly consisting of fiber optic ring and Y-waveguide, fiber optic ring 2 and Y-waveguide 2 are placed in the test box. The pigtail of Y-waveguide 2 is fused with the pigtail of coupler 2 and then placed in a U-shaped groove after being protected by a PTFE sleeve. The U-shaped groove isolates the fiber optic from the temperature chamber. When testing the assembly consisting of fiber optic ring, Y-waveguide, and coupler, fiber optic ring 3, Y-waveguide 3, and coupler 3 are placed in the test box. The pigtail of coupler 3 is fused with coupler 1 and detector 2 respectively and then placed in a U-shaped groove after being protected by a PTFE sleeve. The U-shaped groove isolates the fiber optic from the temperature chamber.

[0017] The fiber optic ring and its component testing method provided by this invention can realize the performance testing of optical path components at different levels, reduce the disturbance to the optical path caused by the operation of the temperature chamber, improve the testing accuracy of the fiber optic ring, and has practical value in the production of fiber optic gyroscopes.

[0018] The fiber optic ring and its component testing method provided by this invention can realize the performance testing of optical path components at different levels, reduce the disturbance to the optical path caused by the operation of the temperature chamber, and improve the testing accuracy of the fiber optic ring.

[0019] Example embodiments have been disclosed herein, and while specific terminology has been used, it is for general illustrative purposes only and should not be construed as limiting. In some embodiments, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in connection with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in connection with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of the invention as set forth by the appended claims.

Claims

1. A testing method for an optical fiber ring and its components, characterized in that, The method includes: The testing system consists of a light source, coupler 1, coupler 2, Y-waveguide 1, detector 1, detector 2, information processing circuit, constant current source drive and temperature control circuit, and a test computer. When testing the fiber optic ring alone, fiber optic ring 1 is placed in the test chamber, with the pigtail of fiber optic ring 1 fused to the pigtail of Y-waveguide 1, protected by a PTFE sleeve, and then placed in a U-groove to isolate the fiber from the chamber. When testing the assembly consisting of the fiber optic ring and the Y-waveguide, fiber optic ring 2 is connected to the Y-waveguide...

2. Place the fiber optic cable 2 in the test box. The pigtail of Y waveguide 2 is fused with the pigtail of coupler 2. After being protected by PTFE tubing, it is placed in a U-shaped groove. The U-shaped groove is used to isolate the fiber optic cable from the temperature chamber. When testing the component consisting of fiber optic ring, Y waveguide, and coupler, place fiber optic ring 3, Y waveguide 3, and coupler 3 in the test box. The pigtail of coupler 3 is fused with coupler 1 and detector 2 respectively. After being protected by PTFE tubing, it is placed in a U-shaped groove. The U-shaped groove is used to isolate the fiber optic cable from the temperature chamber.

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