Temperature control system applicable to pump laser

Abstract

The invention discloses a temperature control system applicable to a pump laser, comprising a temperature sensing circuit, a differential processing circuit, a temperature setting circuit, a photoelectric isolated circuit, a multimode temperature control circuit, a current limiting circuit, a thermoelectric refrigerator driving circuit and a microcontroller, wherein the temperature sensing circuit detects the temperature in the laser and converts the temperature into a voltage value; the voltage value and a set value of the temperature setting circuit form a deviation signal after being processed by the differential processing circuit; a driving signal is generated after the deviation signal is processed by the multimode temperature control circuit; the driving signal drives a thermoelectric refrigerator in the laser to work as input of the thermoelectric refrigerator driving circuit; and the current limiting circuit can set maximum working current of the thermoelectric refrigerator according to the needs, so that the automatic control of the temperature of the laser is realized.

Description

technical field [0001] The invention relates to a temperature control system of a pump laser, in particular to the temperature control of the pump laser in a wide-spectrum optical fiber light source. Background technique [0002] As a new type of angular rate sensor, fiber optic gyroscope is widely used in aerospace, aviation and ship guidance and other fields. As the main component of the fiber optic gyroscope, the performance of the light source directly affects the accuracy and stability of the gyroscope. Broad-spectrum fiber optic light source is a broadband light source based on the principle of spontaneous emission amplification in erbium-doped fiber. Because of its excellent performance, it has become the preferred light source for fiber optic gyroscopes, especially high-precision fiber optic gyroscopes. The high-precision fiber optic gyroscope puts forward higher requirements for the power and wavelength stability of the wide-spectrum fiber optic light source at ful...

AI Technical Summary

Problems solved by technology

However, the thermal control process of lasers including thermoelectric coolers has nonlinear and time-varying uncertainties, and it is difficult to establish an accurate mathematical model. The application of conventional PID controllers cannot achieve ideal control effects, and parameter tuning is also a heavy task. Work

At the same time, the adaptability to operating conditions is also poor. For example, a set of PID parameters that have been carefully tuned may only be valid within a certain temperature range.

Images