建立了基于光纤Fabry-Perot(F-P)腔与光纤Bragg光栅(FBG)串联复用结构传感器的解复用数学模型,分析了串联复用中FBG与F-P腔光谱的叠加对各自解调的影响,得到了分离FBG与F-P腔光谱的方法,从而实现双参数测量高精度解调的目的,并采用基于扫描激光器的波长查询系统验证了该方法的有效性。实验结果表明,该解调方法可以消除串联复用时光纤F-P腔与FBG间的交叉干扰,光纤F-P腔的解调数据最大离散值小于0.2nm,FBG峰值反射波长测量数据最大离散值小于0.7pm。 A demultiplexed mathematical model based on fiber Fabry-Perot (FP) cavity and fiber Bragg grating (FBG) multiplexed structure sensor was established. The influence of the superposition of the FBG and FP cavity spectra on the demodulation was analyzed. The method of separating the FBG and FP cavity spectra was obtained, so as to achieve the purpose of high-precision demodulation of two-parameter measurement. The effectiveness of this method was verified by the wavelength-based laser scanning system. Experimental results show that this demodulation method can eliminate the crosstalk between the fiber FP cavity and the FBG in series multiplexing. The maximum discrete value of the demodulated data of the fiber FP cavity is less than 0.2 nm and the maximum discrete value of the peak reflected wavelength measurement data of the FBG is less than 0.7 pm .