title: Distributed strain measurement with millimeter-order spatial resolution based on Brillouin optical correlation domain analysis.
abstract: 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.
authors.affiliation: Department of Electronic Engineering, Unviersity of Tokyo, Tokyo, Japan. songky@kaist.ac.kr
authors.forename: Kwang Yong
authors.initials: KY
authors.lastname: Song
authors.forename: Zuyuan
authors.initials: Z
authors.lastname: He
authors.forename: Kazuo
authors.initials: K
authors.lastname: Hotate