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

A technology of light source power and erbium-doped fiber, applied in the field of photoelectric sensing, can solve the problem of large cumulative error of positional PID control algorithm, and achieve the effect of avoiding instability of light source system, realizing precise control, and improving dynamic performance.

Active Publication Date: 2019-03-22
HARBIN ENG UNIV
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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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  • Method for improving power stability of erbium-doped fiber light source
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  • Method for improving power stability of erbium-doped fiber light source

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Embodiment Construction

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] The object of the present invention is to propose a PID control algorithm for stabilizing the output power of a light source, and apply this control algorithm to a feedback control module of a light source system to improve the stability of light power. In this method, by designing the light source temperature TEC control loop and LD drive circuit, and proposing an incremental differential advanced PID control algorithm, an erbium-doped fiber light source with stable output optical power is obtained. The power stability of the light source with the incremental differential advanced PID control algorithm is in -40 ℃ ~ +60 ℃ temperature change process has been greatly improved.

[0045] Step 1: Overall structural design of Erbium-doped fiber optic light source

[0046] Design the light path structure and circuit structure of the...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 薛冰张恩康杨柳张勇刚郜中星刘远恒郝义龙
Owner HARBIN ENG UNIV
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