Leblanc M, Huang S Y, Ohn M, Measures R M, Guemes A, Othonos A
Opt Lett. 1996 Sep 1;21(17):1405-7. doi: 10.1364/ol.21.001405.
A method of extracting the strain profile along a fiber Bragg grating from the intensity reflection spectrum is described. The procedure is based on a filter synthesis theory that relates the aperiodicity of a grating with its reflection spectrum. To illustrate the approach, we measured the strain profile near a hole in a plate and obtained a strain resolution of 80 micro. The spatial resolution depends on the strain gradient; i.e., the higher the gradient, the better the resolution. A resolution of 0.8 mm was achieved for a 5-mm grating with a gradient of 250 micro/mm.
描述了一种从强度反射光谱中提取沿光纤布拉格光栅的应变分布的方法。该过程基于一种滤波器合成理论，该理论将光栅的非周期性与其反射光谱联系起来。为了说明该方法，我们测量了板中孔附近的应变分布，并获得了80微应变的应变分辨率。空间分辨率取决于应变梯度；即，梯度越高，分辨率越好。对于一个5毫米长、梯度为250微应变/毫米的光栅，实现了0.8毫米的分辨率。
