Refractive index sensor based on a silica microsphere whispering gallery mode resonator

Mallik, Arun Kumar, Wu, Qiang, Farrell, Gerald and Semenova, Yuliya (2017) Refractive index sensor based on a silica microsphere whispering gallery mode resonator. In: WRAP 2015 - 2015 IEEE Workshop on Recent Advances in Photonics, 16th - 17th December 2015, Bangalore, India.

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Abstract

We investigated the excitation of whispering gallery modes (WGMs) in a silica microsphere by evanescent field coupling method using a ∼2 micrometer diameter fiber taper. Based on this configuration we have developed a sensitive refractometric sensor and observed a red-shift of the WGM resonances with the increase of the surrounding medium refractive index. A sensitivity of ∼114 nanometer per RIU has been achieved in the range of refractive indices from 1.3963 to 1.4004.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Whispering Gallery Mode, Optical resonator, Optical fiber sensors, Refractive index
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Paul Burns
Date Deposited:	22 Nov 2018 10:33
Last Modified:	11 Oct 2019 18:30
URI:	http://nrl.northumbria.ac.uk/id/eprint/36864

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