Engineering;
Laboratory;
of;
Fiber;
Optic;
Sensing;
Technology,;
Wuhan;
University;
of;
Technology,;
Wuhan,430070,;
China;
Three;
Gorges;
University,;
Yichang,;
443002,;
China;
光纤布拉格光栅; 半导体光放大器; 空间分辨率; 光纤光栅; 反射信号; 延迟开关; 插入损耗; 波分复用;