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Proceedings Paper

Hollow-core photonic bandgap fiber gas sensor with high sensitivity and fast response
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Paper Abstract

The effects of modal interference (MI) on the performance of hollow-core photonic bandgap fiber (HC-PBF) gas sensors are investigated. By optimizing mode launch, applying wavelength modulation with proper modulation parameters as well as appropriate digital signal processing, an estimated lower detection limit of <1 ppmv acetylene is achieved with 13-m long HC-PBF. The impacts of drilling side-hole on the MI and response time are also studied. With a 62-cm long sensing HC-PBF drilled with multiple side-holes, an acetylene sensor with a lower detection limit of 11 ppmv and a recovery time of 2 minute is demonstrated.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91577R (2 June 2014); doi: 10.1117/12.2059157
Show Author Affiliations
Fan Yang, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Wei Jin, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Yingchun Cao, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Hoi Lut Ho, The Hong Kong Polytechnic Univ. (Hong Kong, China)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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