A fiber Fabry-Perot etalon interrogation system is proposed for dynamic signal measurement of fiber Bragg grating sensors. The system has a voltage feedback device and is designed to perform temperature control of the fiber Fabry-Perot etalon to increase the amplitude of the demodulated signal to a high level. Data acquisition system is used to form voltage feedback to control the temperature by adjusting the power of the thermoelectric cooler loaded under fiber Fabry-Perot etalon. By controlling the temperature change of the fiber Fabry-Perot etalon, it is possible to increase the amplitude of the demodulated signal and maintain it at a high threshold. The experimental results show that adaptive temperature control has good signal enhancement effect.
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