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

Yuxuan Jiang | Zendy; Yating Yi | Zendy; Gilberto Brambilla | Zendy; Pengfei Wang | Zendy

Open Access

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

Author(s) -

Yuxuan Jiang,

Yating Yi,

Gilberto Brambilla,

Pengfei Wang

Publication year - 2021

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.418953

Subject(s) - optics , materials science , sensitivity (control systems) , attenuation , microfiber , responsivity , detector , physics , composite material , electronic engineering , engineering

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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