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.

引用

页数：4