title: Regenerated gratings in air-hole microstructured fibers for high-temperature pressure sensing.
abstract: We present thermally regenerated fiber Bragg gratings in air-hole microstructured fibers for high-temperature, hydrostatic pressure measurements. High-temperature stable gratings were regenerated during an 800 °C annealing process from hydrogen-loaded Type I seed gratings. The wavelength shifts and separation of grating peaks were studied as functions of external hydrostatic pressure from 15 to 2400 psi, and temperature from 24 °C to 800 °C. This Letter demonstrates a multiplexible pressure and temperature sensor technology for high-temperature environments using a single optical fiber feedthrough.
authors.affiliation: Department of Electrical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA.
authors.forename: Tong
authors.initials: T
authors.lastname: Chen
authors.forename: Rongzhang
authors.initials: R
authors.lastname: Chen
authors.forename: Charles
authors.initials: C
authors.lastname: Jewart
authors.forename: Botao
authors.initials: B
authors.lastname: Zhang
authors.forename: Kevin
authors.initials: K
authors.lastname: Cook
authors.forename: John
authors.initials: J
authors.lastname: Canning
authors.forename: Kevin P
authors.initials: KP
authors.lastname: Chen