An absolute displacement-sensing system based on channeled spectrum processing capable of simultaneous interrogation of fiber Bragg gratings and fiber-optic interferometric sensors is presented in which the role of the optical spectrometer is performed by a scanning Fabry–Perot filter. We demonstrate a resolution of ± 50 nm with an estimated dynamic range of 1 part in 105.
© 2004 Optical Society of America
Christophe Boulet, Mark Hathaway, and David A. Jackson, "Fiber-optic-based absolute displacement sensors at 1500 nm by means of a variant of channeled spectrum signal recovery," Opt. Lett. 29, 1602-1604 (2004)