A novel monitoring system for a fiber Fabry–Perot interferometer (FFPI) temperature sensor has yielded a resolution of 0.013 °C (0.0025 fringe). Light from a broadband source passes through a scanned Michelson interferometer and is reflected from a FFPI to produce a fringe pattern, the temporal position of which is proportional to a change in the optical length of the fiber interferometer. A second Michelson interferometer with a distributed-feedback laser source is used to correct for variations in the translation rate of the motor-driven scanning mirror. Coherence multiplexing of three such sensors has also been demonstrated.
© 2002 Optical Society of America
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(280.0280) Remote sensing and sensors : Remote sensing and sensors
Yichao Chen and Henry F. Taylor, "Multiplexed fiber Fabry–Perot temperature sensor system using white-light interferometry," Opt. Lett. 27, 903-905 (2002)