一种提高光纤光栅反射谱精度的算法

为了获得高分辨率的光纤光栅反射谱，提出了一种能同时实现高扫描频率、高分辨率的光纤光栅反射谱处理分析方法，即采用多节点样条图像插值算法对获得的光栅反射谱进行插值，并通过实验得出插值后的反射谱比插值前反射谱分辨率提高了2倍。实验结果证实了采用多节点样条图像插值算法对光栅反射谱进行处理分析具有一定的指导意义。

An algorithm for improving precision of fiber grating's reflectance spectrum

In order to obtain the reflectance spectrum of fiber grating which has high resolving, an algorithm of the reflectance spectrum is presented in this paper, which can realize high scaning's frequency and high resolving synchronous, that is to say, it can deal with the obtained reflectance spectrum by image interpolation algorithm using many-knot spline function. It can be shown that inserted reflectance spectrum's resolving increase 2 times. The experimental results proved that it has certain instructional significance by image interpolation algorithm using many-knot spline function deal with the reflectance spectrum of fiber grating.