title: Compact and multiplexible hydrogen gas sensor assisted by self-referencing technique.
abstract: We have experimentally implemented a multiplexible but compact fiber sensor system suitable for multipoint sensing of hydrogen gas leakage. By making dual cavities along an optical fiber and coating a palladium film only at the end of the fiber tip, the measurement errors induced by the optical source power fluctuation and the mechanical perturbation in the lead fiber could be compensated. By adjusting the length of the dual-cavity, the capability of multiplexing several hydrogen sensors could be achieved. The experiment results showed that the response speed of the sensor was increasing with temperature, but at a low temperature the response amplitude became large.
authors.affiliation: School of Information and Communications, Gwangju Institute of Science and Technology, Gwangju, South Korea.
authors.forename: Kwan Seob
authors.initials: KS
authors.lastname: Park
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Kim
authors.forename: Joo Beom
authors.initials: JB
authors.lastname: Eom
authors.forename: Seong Jun
authors.initials: SJ
authors.lastname: Park
authors.forename: Min-Su
authors.initials: MS
authors.lastname: Park
authors.forename: Jae-Hyeong
authors.initials: JH
authors.lastname: Jang
authors.forename: Byeong Ha
authors.initials: BH
authors.lastname: Lee