Optical microresonator based on hollow sphere with porous wall for chemical sensing |
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| Authors: | Wang Hanzheng Yuan Lei Kim Cheol-Woon Han Qun Wei Tao Lan Xinwei Xiao Hai |
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| Institution: | Department of Electrical and Computer Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, USA. |
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| Abstract: | A porous-wall hollow glass microsphere (PW-HGM) was investigated as an optical resonator for chemical vapor sensing. A single mode optical fiber taper was used to interrogate the microresonator. Adsorption of chemical molecules into the nanosized pores induced a refractive index change of the thin wall and thus a shift in its resonance spectrum. The PW-HGM resonator had shown higher vapor detection sensitivity in comparison with a solid microsphere under similar test conditions. |
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