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

Fan Yang; Wei Jin; Yingchun Cao; Hoi Lut Ho

doi:10.1117/12.2059157

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2 June 2014 Hollow-core photonic bandgap fiber gas sensor with high sensitivity and fast response

Fan Yang, Wei Jin, Yingchun Cao, Hoi Lut Ho

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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91577R (2014) https://doi.org/10.1117/12.2059157
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

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.

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Fan Yang, Wei Jin, Yingchun Cao, and Hoi Lut Ho "Hollow-core photonic bandgap fiber gas sensor with high sensitivity and fast response", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91577R (2 June 2014); https://doi.org/10.1117/12.2059157

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