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采用一种新的波长算法,通过获取光谱峰的位置信息,对相邻像元间的波长进行细分,将线阵CCD微型光谱仪波长的测量分辨率提高到了1pm。实验测量结果表明:测量光纤布喇格光栅(FBG)的波长稳定性优于1pm;测量光纤外腔式Fabry-Perot干涉仪(EFPI)的波长稳定性为5pm;计算速度比采用插值算法更快,有效地提高了波长测量的分辨率和采样频率,可以实现光纤传感信号的高速高精度解调。
Using a new wavelength algorithm, the wavelength of adjacent pixels is subdivided by obtaining the position information of the spectral peak, and the resolution of the wavelength of the linear CCD micro-spectrometer is increased to 1 pm. The experimental results show that the wavelength stability of fiber Bragg grating (FBG) is better than 1 pm, the wavelength stability of fiber Fabry-Perot interferometer (EFPI) is 5 pm, and the calculation speed is faster than interpolation , Which effectively improves the resolution and sampling frequency of the wavelength measurement and enables high-speed and high-precision demodulation of optical fiber sensing signals.