结合恢复单色频率绝对相位解调算法研究了光源输出参数对空间扫描型光纤法布里珀罗传感解调影响。建立了相位解调值随光源中心波长变化的数学模型,通过改变光源光功率和光谱进行了解调实验研究。结果表明压力解调值的误差值与光源输出光功率有关;当温度升高时光源光谱会产生红移,使压力解调值产生误差;解调值与光源光谱中心波长满足二次函数关系。实验结果与理论分析一致,在140kPa范围内保证0.1%的解调误差时,光源光谱中心波长波动小于1.79nm。 Combining with the monochromatic frequency absolute phase demodulation algorithm, the effect of the output parameters of the light source on the Fabry-Perot sensor demodulation in space-scanning fiber is studied. The mathematical model of the phase demodulation value changing with the center wavelength of the light source was established. The demodulation experiment was carried out by changing the optical power and spectrum of the light source. The results show that the error of the pressure demodulation value is related to the output optical power of the light source. When the temperature rises, the spectrum of the light source produces red-shift, resulting in error of the pressure demodulation value. The demodulation value and the center wavelength of the light source satisfy the quadratic function. The experimental results are consistent with the theoretical analysis. When the demodulation error of 0.1% is guaranteed in the range of 140kPa, the center wavelength of the light source spectrum is less than 1.79nm.