All-fiber photoacoustic gas sensor with graphene nano-mechanical resonator as the acoustic detector

Tan Yanzhen; Yang Fan; Ma Jun; Ho Hoi Lut; Jin Wei

doi:10.1117/12.2194447

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28 September 2015 All-fiber photoacoustic gas sensor with graphene nano-mechanical resonator as the acoustic detector

Tan Yanzhen, Yang Fan, Ma Jun, Ho Hoi Lut, Jin Wei

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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96341K (2015) https://doi.org/10.1117/12.2194447
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

We demonstrate an all-optical-fiber photoacoustic (PA) spectrometric gas sensor with a graphene nano-mechanical resonator as the acoustic detector. The acoustic detection is performed by a miniature ferrule-top nano-mechanical resonator with a ∼100-nm-thick, 2.5-mm-diameter multilayer graphene diaphragm. Experimental investigation showed that the performance of the PA gas sensor can be significantly enhanced by operating at the resonance of the grapheme diaphragm where a lower detection limit of 153 parts-per-billion (ppb) acetylene is achieved. The all-fiber PA sensor which is immune to electromagnetic interference and safe in explosive environments is ideally suited for real-world remote, space-limited applications and for multipoint detection in a multiplexed fiber optic sensor network.

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Tan Yanzhen, Yang Fan, Ma Jun, Ho Hoi Lut, and Jin Wei "All-fiber photoacoustic gas sensor with graphene nano-mechanical resonator as the acoustic detector", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96341K (28 September 2015); https://doi.org/10.1117/12.2194447

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