Title :
Single- and multipoint fiber-laser sensors
Author :
Ball, G.A. ; Morey, W.W. ; Cheo, P.K.
Author_Institution :
United Technologies Res. Center, East Hartford, CT, USA
Abstract :
The operation of single- and multipoint active fiber sensors for both strain and temperature measurements is reported. An active fiber source consists of a pair of wavelength-matched Bragg gratings formed in a rare earth doped fibre, and when, optically pumped, lase in a narrow bandwidth around the Bragg wavelength. The primary advantage of an active sensor over a passive sensor is a significant increase in signal-to-noise ratio.<>
Keywords :
diffraction gratings; fibre lasers; fibre optic sensors; optical pumping; strain gauges; thermometers; Bragg wavelength; active fiber sensors; active fiber source; lase; multipoint fiber-laser sensors; narrow bandwidth; optically pumped; rare earth doped fibre; signal-to-noise ratio; singlepoint fibre laser sensors; strain measurements; temperature measurements; wavelength-matched Bragg gratings; Bragg gratings; Capacitive sensors; Fiber gratings; Optical fiber sensors; Optical fibers; Optical pumping; Optical sensors; Strain measurement; Temperature measurement; Temperature sensors;
Journal_Title :
Photonics Technology Letters, IEEE
