title: Highly-sensitive gas pressure sensor using twin-core fiber based in-line Mach-Zehnder interferometer.
abstract: A Mach-Zehnder interferometer based on a twin-core fiber was proposed and experimentally demonstrated for gas pressure measurements. The in-line Mach-Zehnder interferometer was fabricated by splicing a short section of twin-core fiber between two single mode fibers. A micro-channel was created to form an interferometer arm by use of a femtosecond laser to drill through one core of the twin-core fiber. The other core of the fiber was remained as the reference arm. Such a Mach-Zehnder interferometer exhibited a high gas pressure sensitivity of -9.6 nm/MPa and a low temperature cross-sensitivity of 4.4 KPa/°C. Moreover, ultra-compact device size and all-fiber configuration make it very suitable for highly-sensitive gas pressure sensing in harsh environments.
authors.forename: Zhengyong
authors.initials: Z
authors.lastname: Li
authors.forename: Changrui
authors.initials: C
authors.lastname: Liao
authors.forename: Yiping
authors.initials: Y
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Xu
authors.forename: Dongning
authors.initials: D
authors.lastname: Wang
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Dong
authors.forename: Shen
authors.initials: S
authors.lastname: Liu
authors.forename: Qiao
authors.initials: Q
authors.lastname: Wang
authors.forename: Kaiming
authors.initials: K
authors.lastname: Yang
authors.forename: Jiangtao
authors.initials: J
authors.lastname: Zhou