Fiber-optic gyroscope without optical fiber fusion point and manufacturing method of fiber-optic gyroscope

Abstract

The invention relates to a fiber-optic gyroscope without an optical fiber fusion point. The fiber-optic gyroscope comprises a super-radiance light-emitting diode (LED), an optical fiber coupler, a Y waveguide modulator, a fiber-optic ring and a first photoelectric detector, wherein the optical fiber coupler comprises a first port, a second port, a third port and a fourth port; the Y waveguide modulator comprises a first port and two second ports; the first port of the optical fiber coupler is directly connected with the super-radiance LED; the third port of the optical fiber coupler is directly connected with the first photoelectric detector; the fourth port of the optical fiber coupler is directly connected with the first port of the Y waveguide modulator; the fiber-optic ring is directly connected with the two second ports of the Y waveguide modulator; the optical fiber coupler is manufactured from a first optical fiber and a second optical fiber by a fused biconical taper method; the fiber-optic ring is formed by winding a third optical fiber. The invention also relates to a manufacturing method of the fiber-optic gyroscope. The fiber-optic gyroscope without the optical fiber fusion point is higher in environmental adaptation, lower in failure rate and lower in transmission loss.

Description

technical field [0001] The present invention relates to fiber optic gyroscopes. The invention also relates to methods of making fiber optic gyroscopes. Background technique [0002] For a moving body equipped with an inertial navigation system, its motion state is determined by the gyroscope or accelerometer in the inertial navigation system. As one of various gyroscopes, fiber optic gyroscopes do not require precise processing and strictly sealed optical cavities, high-quality mirrors, and have fewer parts and no mechanical wear problems, so they are better than lasers. Gyroscopes or electromechanical gyroscopes have better application prospects. [0003] Such as figure 1 As shown, the existing fiber optic gyroscope is generally composed of discrete components, mainly including: superluminescent light emitting diode 1, fiber coupler 2, Y waveguide modulator 3, fiber ring 4, photodetector 5 and signal processing circuit 6. Each component of the existing fiber optic gyros...

AI Technical Summary

Problems solved by technology

These will make the repeatability or consistency of the fiber optic gyroscope poor, and will also lead to large transmission loss

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