title: Fiber in-line Mach-Zehnder interferometer based on an inner air-cavity for high-pressure sensing.
abstract: We demonstrate a fiber in-line Mach-Zehnder interferometer based on an inner air-cavity with open micro-channel for high-pressure sensing applications. The inner air-cavity is fabricated by combining femtosecond laser micromachining and the fusion splicing technique. The micro-channel is drilled on the top of the inner air-cavity to allow the high-pressure gas to flow in. The fiber in-line device is miniature, robust, and stable in operation and exhibits a high pressure sensitivity of ∼8,239  pm/MPa.
authors.forename: W
authors.initials: W
authors.lastname: Talataisong
authors.forename: D N
authors.initials: DN
authors.lastname: Wang
authors.forename: R
authors.initials: R
authors.lastname: Chitaree
authors.forename: C R
authors.initials: CR
authors.lastname: Liao
authors.forename: C
authors.initials: C
authors.lastname: Wang
mesh_terms: D000388:Air; D007368:Interferometry / Q000295:instrumentation*; D055100:Optical Fibers; D011312:Pressure