We describe tunable-optical-filter-based white-light interferometry for sensor interrogation. By introducing a tunable optical filter into a white-light interferometry system, one can interrogate an interferometer with either quadrature demodulation or spectral-domain detection at low cost. To demonstrate the feasibility of effectively demodulating various types of interferometric sensor, experiments have been performed using an extrinsic Fabry-Perot tunable filter to interrogate two extrinsic Fabry-Perot interferometric temperature sensors and a diaphragm-based pressure sensor.
© 2005 Optical Society of America
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2440) Instrumentation, measurement, and metrology : Filters
(120.3180) Instrumentation, measurement, and metrology : Interferometry
Bing Yu, Anbo Wang, Gary Pickrell, and Juncheng Xu, "Tunable-optical-filter-based white-light interferometry for sensing," Opt. Lett. 30, 1452-1454 (2005)