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.
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[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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