브릴루앙 동적 격자의 시간 영역 분석을 이용한 온도와 변형률 분포의 분리형 측정

초록

Discriminative measurements of strain and temperature distribution are demonstrated based on optical time-domain analysis of Brillouin dynamic grating (BDG) in a polarizationmaintaining fiber. The local information of the Brillouin frequency and the BDG frequency are acquired with a 1.2 m spatial resolution, and analyzed together to provide the distribution map of temperature and strain variation with the accuracies of ±1 K and ± 20 με, respectively.