Ultrafast femtosecond-laser-induced fiber Bragg gratings in air-hole microstructured fibers for high-temperature pressure sensing.
We present fiber Bragg grating pressure sensors in air-hole microstructured fibers for high-temperature operation above 800 degrees C. An ultrafast laser was used to inscribe Type II grating in two-hole optical fibers. The fiber Bragg grating resonance wavelength shift and peak splits were studied as a function of external hydrostatic pressure from 15 psi to 2000 psi. The grating pressure sensor shows stable and reproducible operation above 800 degrees C. We demonstrate a multiplexible pressure sensor technology for a high-temperature environment using a single fiber and a single-fiber feedthrough.
Jewart
Charles M
CM
Department of Electrical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA.
Wang
Qingqing
Q
Canning
John
J
Grobnic
Dan
D
Mihailov
Stephen J
SJ
Chen
Kevin P
KP