基于F-P滤波器的光纤光栅解调和标定

Demodulating and calibrating for fiber Bragg grating based on Fabry-Perot filter

探讨了基于F-P滤波法对光纤光栅波长解调和标定的方法。把信号电压整形为矩形脉冲信号进行解调和标定,用这种方法进行波长解调有很高的精度和稳定性,根据该方法设计的波长解调器已广泛应用于大型多点安全监测工程。最后,给出具体的波长解调和标定的实例,精度可达到±2 pm。

Based on an optical fiber Fabry-Perot（F-P） tunable filter,the methods to demodulate and calibrate the wavelength of FBG are discussed. According to the method of turning the voltage signal into rectangle pulse to demodulate and calibrate the wavelength, very high accuracy and stability are attained and a wavelength demodulator that has been used extensively in large-scale multipoint monitor engineering is designed. At last, an example of wavelength demodulation and calibration is given, and accuracy can reach to ± 2 pm.