将乙炔(C2H2)气体的吸收光谱作为标准波长参考,对可调谐光纤法布里-珀罗滤波器进行波长实时定标,使解调系统的测量精度提高到1pm。根据可调谐光纤法布里-珀罗滤波器谐振波长的周期性,提出了大波长范围的波长定标方法,从而可以在1525～1615nm的范围内对可调谐光纤法布里-珀罗进行精确定标,实现了高精度大波长范围的信号探测。相比于传统的以光纤光栅作为波长参考的定标方法,该方法的测量精度、测量范围、系统运行可靠性都大为改善。 The absorption spectrum of acetylene (C2H2) gas is used as a standard wavelength reference, and the wavelength of the tunable fiber Fabry-Perot filter is calibrated in real time to improve the measurement accuracy of the demodulation system to 1 μm. According to the periodicity of resonant wavelength of tunable fiber Fabry-Perot filter, a method of wavelength calibration in a large wavelength range is proposed, so that the tunable fiber Fabry-Perot can be accurately located in the range of 1525-1615 nm Calibration, to achieve high-precision large wavelength range of signal detection. Compared with the traditional calibration method using fiber grating as the reference wavelength, the measurement accuracy, measurement range and system reliability are greatly improved.