闪耀光纤光栅写制技术及解调技术研究

Fabricating Technique and Sensing Interrogation System Based on Blazed Fiber Bragg Grating

利用相位掩模法,对闪耀光纤光栅的写制技术进行了研究.在载氢光敏光纤中写制了不同倾斜角度的闪耀光纤光栅,给出了相应的结果谱图.利用闪耀光纤光栅的包层耦合模,通过侧面光检测技术,实现了一种以闪耀光纤光栅为分光器件的光纤光栅波长解调系统.对C波段的波长进行了解调,给出了实验系统及相应结果分析.

The fabricating technique of blazed fiber Bragg grating was presented. BFBG fabrication technique was discussed. By phase mask method,several BFBG in different tilt angle were successfully fabricated on H2-doped photo sensitive fiber. Their transmission spectrums were also presented. A fiber Bragg grating sensing interrogation system using BFBG as the core wavelength division component was proposed. A photo detector was put on the focal plane of the lens to detect the light. BFBG was used to tap light out of the fiber core to fiber cladding. The scheme and result was discussed in detail.