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Proceedings Paper

Methane sensing using multiple-coupling gaps in hollow-core photonic bandgap fibers
Author(s): J. M. Lazaro; A. M. Cubillas; M. Silva-Lopez; O. M. Conde; M. Petrovich; J. M. Lopez-Higuera
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Paper 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.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70044U (16 May 2008); doi: 10.1117/12.786151
Show Author Affiliations
J. M. Lazaro, Univ. de Cantabria (Spain)
A. M. Cubillas, Univ. de Cantabria (Spain)
M. Silva-Lopez, Univ. de Cantabria (Spain)
O. M. Conde, Univ. de Cantabria (Spain)
M. Petrovich, Univ. of Southampton (United Kingdom)
J. M. Lopez-Higuera, Univ. de Cantabria (Spain)


Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors
David Sampson; Stephen Collins; Kyunghwan Oh; Ryozo Yamauchi, Editor(s)

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