The simulation result shows the least narrow bandwidth of Bragg grating under the defined parameters is 0.02 nm when its reflectivity is 1,which is much narrower than the fiber Bragg grating used in typical distributed sensor system.

• 仿真结果显示了固定参数下布拉格光栅的极限窄带宽；得到的反射率为1、带宽为0.；02 nm的窄带宽布拉格光栅；比现今分布式传感系统中使用的布拉格光栅的带宽窄1个数量级。