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

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

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.

Citation Download Citation

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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