摘要
提出了一种光纤包层半径为正弦函数的光纤光栅.运用传输矩阵理论对该结构光纤光栅的传输特性进行了分析.与线性啁啾光栅相比,在施加一定拉力的情况下,正弦型包层结构光纤光栅具有理想的箱型反射谱,边缘陡峭度高.随着施加拉力的增大,光栅的反射谱中心波长将向长波方向移动,且反射带宽增大.
A fiber grating structure with cladding radius as sinusoidal function along the grating length is introduced. The transmission properties of the this type grating was studies on the basis of the transfer matrix theory. Compared with linearly chirped fiber grating, the fiber grating exhibits a Box spectrum with steep edges and high reflectivity when tension is applied to it. With the tension increasing, the center wave length in the grating reflecting spectrum will move to-ward the long wave direction and the reflecting bandwidth is greatly widened.
出处
《光电技术应用》
2009年第4期38-40,共3页
Electro-Optic Technology Application
关键词
光纤光栅
正弦包层
拉力应变
fiber bragg grating
sinusoidal cladding
tension strain
