Distributed strain measurement with millimeter-order spatial resolution based on Brillouin optical correlation domain analysis.
Distributed strain sensing with millimeter-order spatial resolution is demonstrated in optical fibers based on Brillouin optical correlation domain analysis. A novel beat lock-in detection scheme is introduced to suppress background noises coming from the reflection of Brillouin pump waves. The Brillouin frequency shifts of 3 mm fiber sections are successfully measured with a theoretical spatial resolution of 1.6 mm.
Song
Kwang Yong
KY
Department of Electronic Engineering, Unviersity of Tokyo, Tokyo, Japan. songky@kaist.ac.kr
He
Zuyuan
Z
Hotate
Kazuo
K