We present a novel signal-processing algorithm for single-mode optical fiber extrinsic Fabry–Perot interferometric sensors that can achieve both high-resolution, absolute measurement of the cavity length and a large dynamic measurement range simultaneously. The algorithm is based on an accurate model of the characteristics of a fiber-optic sensor that takes into account the phase shift that is due to the coupling of light reflected at the second surface to the lead-in fiber end.
© 2004 Optical Society of America
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry
Ming Han, Yan Zhang, Fabin Shen, Gary R. Pickrell, and Anbo Wang, "Signal-processing algorithm for white-light optical fiber extrinsic Fabry-Perot interferometric sensors," Opt. Lett. 29, 1736-1738 (2004)