中文摘要：

研究了一种基于掺Er超荧光光源(EDSFS)的滤波解调方法,分析了光源的输出功率谱形状。利用光谱中光功率密度与波长的线性关系,实现了光纤光栅传感信号的动态解调。建立振动测试系统,采用高精度差分变压器式位移传感器作为参考,对比讨论了两种传感器输出的时域波形和频谱。结果表明,在相同的条件下,二者的动态响应特性具有很好的一致性。由于系统的光源和解调部分合为一体,无机械调谐元件,很适合高速动态测量。

英文摘要：

A method for filter demodulation based on erbium-doped superfluorescent fiber source(EDSFS)is studied,and the power spectrum shape of source is analyzed.Utilizing linear relation between the light power density and wavelength in the spectra,dynamic demodulation of fiber grating sensing signal is realized.The vibration measurement system is built by using high-precision differential transformer displacement sensors as a reference,the time-domain waveform and spectrum by two sensors output are compared and di...