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Proceedings Paper

Parameters analysis of few-modes optical fiber evanescent absorption sensor
Author(s): Xiaohong Deng; Yihui Wu; Feng Li; Lianqun Zhou; Xuan Ming
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Paper Abstract

An evanescent wave sensor made of few modes optical fiber was studied. The influence of the geometry of the sensing region, including absorbing medium refractive index n2 and the core radius of the bare fiber a, on the modal fractional power in the cladding was analyzed. The percentage of the mode power in total guiding power was mainly calculated at different launching conditions, such as the incidence angle θi By analyzing the output power fraction from calculation and the experiment, the suitable parameters of the sensor could be chosen and the sensitivity was improved. The results will help the design in some way of this kind of sensor.

Paper Details

Date Published: 7 February 2006
PDF: 6 pages
Proc. SPIE 6032, ICO20: MEMS, MOEMS, and NEMS, 603208 (7 February 2006); doi: 10.1117/12.667852
Show Author Affiliations
Xiaohong Deng, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Chinese Academy of Sciences (China)
Yihui Wu, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Feng Li, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Chinese Academy of Sciences (China)
Lianqun Zhou, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Chinese Academy of Sciences (China)
Xuan Ming, Changchun Institute of Optics, Fine Mechanics and Physics (China)


Published in SPIE Proceedings Vol. 6032:
ICO20: MEMS, MOEMS, and NEMS
Masayoshi Esashi; Zhaoying Zhou, Editor(s)

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