High-sensitivity, fast-response ethanol gas optical sensor based on a dual microfiber coupler structure with the Vernier effect

Jiang, Yuxuan, Brambilla, Gilberto and Wang, Pengfei (2021) High-sensitivity, fast-response ethanol gas optical sensor based on a dual microfiber coupler structure with the Vernier effect. Optics Letters, 46 (7), 1558-1561. (doi:10.1364/OL.418953).

Record type: Article

Abstract

A high-sensitivity ethanol gas sensor based on two microfiber couplers and the Vernier effect is examined in this Letter using the unique variation rate conversion point characteristics. The output spectrum of the two couplers connected in parallel are superimposed to form a symmetrical envelope curve, showing high responsivity to variations in the external environment. Ethanol sensitivity was achieved by coating the waist region of the coupler with a mixture of Nile red and polymethyl methacrylate. When the concentration of ethanol gas changes, the envelope spectrum shifts. Experimental results show that a high responsivity of 160 pm/ppm can be obtained by tracing the reference peaks in the envelope curve and that the response and recovery times are on the order of seconds.

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High-sensitivity, fast-response ethanol gas optical sensor based on a dual microfiber coupler structure with the Vernier effect - Accepted Manuscript

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Accepted/In Press date: 28 February 2021

e-pub ahead of print date: 1 March 2021

Published date: 1 April 2021

Additional Information: Funding Information: Funding. National Key Program of National Natural Science Foundation of China (61935006, 62090062); 111 project (B13015); Heilongjiang Touyan Innovation Team Program; Shenzhen Basic Research Project (JCYJ20190808173619062). Publisher Copyright: © 2021 Optical Society of America

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