Methane sensing using multiple-coupling gaps in hollow-core photonic bandgap fibers

J. M. Lazaro; A. M. Cubillas; M. Silva-Lopez; O. M. Conde; M. Petrovich; J. M. Lopez-Higuera

doi:10.1117/12.786151

16 May 2008 Methane sensing using multiple-coupling gaps in hollow-core photonic bandgap fibers

J. M. Lazaro, A. M. Cubillas, M. Silva-Lopez, O. M. Conde, M. Petrovich, J. M. Lopez-Higuera

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70044U (2008) https://doi.org/10.1117/12.786151
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

Gas detection and gas sensing based on hollow core photonic bandgap fiber (HC-PBF) is a very promising technique due to the long interaction light-gas lengths that are achievable. However, long path-lengths also imply higher gas filling times of the hollow fiber and higher response times of the detection systems what can constitute a serious practical inconvenience. In this paper, the high sensitivity is maintained but the sensor response time is reduced by using multiple-coupling fiber gaps. The results and conclusions extracted from a systematic experimental study (comparing the spectra and filling time of different HC-PBF lengths and different number of coupling gaps) are presented and discussed. Finally, the maximum number of gaps allowed in the system is modelled.

Citation Download Citation

J. M. Lazaro, A. M. Cubillas, M. Silva-Lopez, O. M. Conde, M. Petrovich, and J. M. Lopez-Higuera "Methane sensing using multiple-coupling gaps in hollow-core photonic bandgap fibers", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70044U (16 May 2008); https://doi.org/10.1117/12.786151

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