title: Multiplexed high temperature sensing with sapphire fiber air gap-based extrinsic Fabry-Perot interferometers.
abstract: In this Letter we present a high temperature multipoint sensing method using sapphire fiber air gap-based extrinsic Fabry-Perot interferometers. Three sensors are fabricated and tested in a single sensing link. Experimental results show that the air gap-based high temperature sensors have a very high temperature sensitivity (>20 nm/ degrees C) and resolution (<0.3 degrees C) and are capable of operating at temperatures well above 1000 degrees C. The multiplexed sapphire sensors present a significant advancement over traditional single-point sensors for critical high temperature applications.
authors.affiliation: Center for Photonics Technology, Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0287, USA. wangjj@vt.edu
authors.forename: Jiajun
authors.initials: J
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Dong
authors.forename: Evan
authors.initials: E
authors.lastname: Lally
authors.forename: Jianmin
authors.initials: J
authors.lastname: Gong
authors.forename: Ming
authors.initials: M
authors.lastname: Han
authors.forename: Anbo
authors.initials: A
authors.lastname: Wang