Bridge Structure for FBG Temperature Compensation
HUANG Shan, ZHAO Hua-feng, YU Tao, ZHAO Kai-jun, LIU Hai-tao (Dept. of Electronic Engineering, Tsinghua University, Beijing 100084, CHN)
By analyzing variation of FBG Bragg wavelength with temperature and strain, a metal bridge structure for Bragg wavelength shift compensation is demonstrated. Compensation experiments on grating with lengths of 3 cm and 10 cm show that from 10 ℃ to 70 ℃, Bragg wavelength shift is no more than 0.03 nm.