Method for improving power stability of erbium-doped fiber light source

Abstract

The invention provides a method for improving power stability of an erbium-doped fiber light source. The whole structure of the erbium-doped fiber light source is designed; a light source TEC temperature control module and an LD driving circuit are designed; light subjected to beam splitting of an optical coupler reaches to a feedback control module of a circuit from the output end of the light source, and a photoelectric detector taken as a core device of the feedback control module receives return light and converts an optical signal into an electrical signal; increment type previous difference PID control algorithm is written, after compiling is completed, a control program is downloaded to a total controller of a light source system, the power of light output by the light source is controlled, and the light source with stable power is output. The control algorithm is applied to the feedback control module for the power of the erbium-doped fiber light source, the erbium-doped fiberlight source which has good power stability and linear changes in temperature with the power within a -40 DEG C-+60 DEG C range can be obtained, and more, solid foundation is provided for research ofa fiber-optic gyroscope of high precision.

Description

technical field [0001] The invention relates to a method for improving the power stability of a light source, in particular to a method for improving the power stability of an erbium-doped optical fiber light source, and belongs to the field of photoelectric sensing. Background technique [0002] Erbium-doped superfluorescent fiber light source has excellent average wavelength thermal stability and power stability, and the output spectrum is flat, and is widely used in the field of fiber optic gyroscopes. With the improvement of navigation accuracy requirements, the requirements for each important component of the fiber optic gyroscope also increase. Erbium-doped fiber optic light source, as the source component of the fiber optic gyroscope, directly affects the output performance of the gyroscope. The average wavelength thermal stability and power stability are two important output characteristics of the light source. The thermal stability of the average wavelength of the ...

AI Technical Summary

Problems solved by technology

[0005] The output of the position-type PID control algorithm is related to the entire state in the past, and the accumulated value of the deviation is used in the algorithm, while the incremental PID control algorithm is only related to the error value of the last two moments, so it can be known that the position-type PID control algorithm The cumulative error is relatively large

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