Two-Parameter Elliptical Fitting Method for Short-Cavity Fiber Fabry–Perot Sensor Interrogation

Autor:	Xiongxing Zhang, Wei Wang, Haibin Chen, Ying Tang, Zhibo Ma, Kening Wang
Jazyk:	angličtina
Rok vydání:	2018
Předmět:	elliptical fitting method fiber Fabry–Perot sensor white light interference short cavity Chemical technology TP1-1185
Zdroj:	Sensors, Vol 19, Iss 1, p 36 (2018)
Druh dokumentu:	article
ISSN:	1424-8220 19010036
DOI:	10.3390/s19010036
Popis:	To solve the cavity interrogation problem of short cavity fiber Fabry–Perot sensors in white light spectral interrogation with amplified spontaneous emissions (ASEs) as the white light sources, a data processing method, using an improved elliptical fitting equation with only two undetermined coefficients, is proposed. Based on the method, the cavity length of a fiber Fabry–Perot sensor without a complete reflection spectrum period in the frequency domain can be interrogated with relatively high resolution. Extrinsic fiber Fabry–Perot air-gap sensors with cavity lengths less than 30 μm are used to experimentally verify the method, and are successfully interrogated with an accuracy better than 0.55%.
Databáze:	Directory of Open Access Journals
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