Gas Sensor Based on Photonic Crystal Fibres in the 2ν3 and ν2+2ν3 Vibrational Bands of Methane

被引：34

作者：

Cubillas, Ana M. ^{[1
]}

Lazaro, Jose M. ^{[1
]}

Conde, Olga M. ^{[1
]}

Petrovich, Marco N. ^{[2
]}

Lopez-Higuera, Jose M. ^{[1
]}

机构：

[1] Univ Cantabria, Photon Engn Grp, E-39005 Santander, Spain

[2] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

来源：

SENSORS | 2009年 / 9卷 / 08期

关键词：

gas detectors; methane; fibre optic sensors; photonic crystal fibres; hollow-core photonic bandgap fibres; absorption spectroscopy; ABSORPTION;

D O I：

10.3390/s90806261

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this work, methane detection is performed on the 2 nu(3) and nu(2) + 2 nu(3) absorption bands in the Near-Infrared (NIR) wavelength region using an all-fibre optical sensor. Hollow-core photonic bandgap fibres (HC-PBFs) are employed as gas cells due to their compactness, good integrability in optical systems and feasibility of long interaction lengths with gases. Sensing in the 2 nu(3) band of methane is demonstrated to achieve a detection limit one order of magnitude better than that of the nu(2) + 2 nu(3) band. Finally, the filling time of a HC-PBF is demonstrated to be dependent on the fibre length and geometry.

引用

页码：6261 / 6272

页数：12

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