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7 February 2006 Parameters analysis of few-modes optical fiber evanescent absorption sensor
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Proceedings Volume 6032, ICO20: MEMS, MOEMS, and NEMS; 603208 (2006)
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
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.
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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);

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