High Sensitivity Gas Detection with Microstructured Optical Fibres

被引：1
|
作者：
Jin, Wei [1 ,2 ]
Bao, Haihong [1 ,2 ]
Zhao, Pengcheng [1 ,2 ]
Qi, Yun [1 ,2 ]
Ho, Hoi Lut [1 ,2 ]
机构：
[1] Hong Kong Polytech Univ, Dept Elect Engn, Hong Kong, Peoples R China
[2] Hong Kong Polytech Univ, Shenzhen Res Inst, Photon Res Ctr, 18 Yuexing 1st Rd, Shenzhen 518057, Peoples R China
来源：
2020 22ND INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON 2020) | 2020年
关键词：
gas detection; optical fibre sensor; laser spectroscopy; hollow-core optical fibre; microstructured optical fibre; optical nanofibre; HOLLOW; SPECTROSCOPY; CAVITY;
D O I：
10.1109/icton51198.2020.9203033
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report recent development in laser spectroscopic gas sensing with microstructured hollow-core optical fibres and sub-wavelength-diameter optical nanofibers. The spectroscopic methods employed are photothermal spectroscopy for gases with strong absorption and stimulated Raman gain/dispersion spectroscopy for Ramanactive gases. Compared with open-path systems, the use of microstructured optical fibres as sensing elements enables compact all-fibre systems with high performance. With photothermal interferometry, parts-per-billion (ppb) to parts-per-trillion (ppt) level detection of acetylene, methane and ammonia are demonstrated with dynamic range up to seven orders of magnitude. With stimulated Raman spectroscopy, parts-per-million (ppm) level detection of hydrogen is achieved with dynamic range of five orders of magnitude.
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收藏
页数：4
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