High-stability ASE light source for high-precision fiber-optic gyroscope

Abstract

The invention relates to a high-stability ASE light source for a high-precision fiber-optic gyroscope. The high-stability ASE light source is characterized by comprising a two-way backward light path,a Gaussian filter, a high-performance driving circuit and a power feedback control unit; the two-way backward optical path comprises a pump laser, a wavelength division multiplexer, a high-concentration erbium-doped optical fiber, an optical fiber reflector and an isolator; laser generated by the pump laser passes through the wavelength division multiplexer and then is injected into the erbium-doped optical fiber, spontaneous radiation signals are generated in the front direction and the rear direction respectively, and forward spontaneous radiation signal ASE light is amplified through the erbium-doped optical fiber after being reflected by the optical fiber reflector and overlaps with backward spontaneous radiation signal ASE light to form backward output light; the high-performance driving circuit comprises a TEC driver and a laser driver; and the power feedback control unit comprises a light splitting coupler, a photoelectric detector and a comparison circuit. The design is scientific and reasonable, the full-temperature average wavelength stability of the ASE light source is improved, and the improvement of the scale factor stability of the high-precision fiber-optic gyroscope is facilitated.

Description

technical field [0001] The invention belongs to the technical field of fiber optic gyroscopes, and particularly relates to a high-stability ASE light source for high-precision fiber optic gyroscopes. Background technique [0002] The fiber optic gyroscope is a new solid-state inertial instrument that utilizes the Sagnac effect to sense the rotational angular velocity. It has the characteristics and advantages of low cost, long life, light weight, small size, large dynamic range, start-up time period, wide accuracy application coverage, and high potential accuracy, especially In the field of high-precision applications, fiber-optic gyroscopes will become the most important inertial instruments. [0003] The light source technology is the key technology of the fiber optic gyroscope, and the performance of the light source will affect the performance of the gyroscope. Compared with the traditional SLD light source, the ASE light source has the characteristics of weak coherence...

AI Technical Summary

Problems solved by technology

[0009] (3) The third item is that the temperature change leads to the change of the pump power, which in turn leads to the deformation of the spectrum, thus affecting the average wavelength;

Images