Parameters analysis of few-modes optical fiber evanescent absorption sensor

Xiaohong Deng; Yihui Wu; Feng Li; Lianqun Zhou; Xuan Ming

doi:10.1117/12.667852

7 February 2006 Parameters analysis of few-modes optical fiber evanescent absorption sensor

Xiaohong Deng, Yihui Wu, Feng Li, Lianqun Zhou, Xuan Ming

Proceedings Volume 6032, ICO20: MEMS, MOEMS, and NEMS; 603208 (2006) https://doi.org/10.1117/12.667852
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

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 θ_i 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.

Citation Download Citation

Xiaohong Deng, Yihui Wu, Feng Li, Lianqun Zhou, and Xuan Ming "Parameters analysis of few-modes optical fiber evanescent absorption sensor", Proc. SPIE 6032, ICO20: MEMS, MOEMS, and NEMS, 603208 (7 February 2006); https://doi.org/10.1117/12.667852

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