Abstract

High finesse hollow-core photonic bandgap fiber (HC-PBF) resonating Fabry–Perot gas cells are presented. These gas cells are made with a piece of HC-PBF sandwiched by two single mode fibers with mirrored ends. A HC-PBF cavity made with 6.75-cm-long HC-1550-06 fiber achieved a cavity finesse of 128, corresponding to an effective optical path length of ∼5.5 m. Experiment with a 9.4-cm-long Fabry–Perot gas cell with a finesse of 68 demonstrated a detection limit of 7 ppm acetylene. Compared with a single-path nonresonating HC-PBF, the use of a high finesse resonating HC-PBF cavity can reduce significantly the effect of modal interference on gas detection and improve the detection sensitivity. The cavity-enhanced HC-PBF gas cells enable stronger light–gas interaction and can be used to develop all-fiber gas sensors with high sensitivity and fast response.

© 2017 IEEE

Towards high sensitivity gas detection with hollow-core photonic bandgap fibers

Fan Yang, Wei Jin, Yingchun Cao, Hoi Lut Ho, and Yiping Wang
Opt. Express 22(20) 24894-24907 (2014)

Hollow-core fiber Fabry–Perot photothermal gas sensor

Fan Yang, Yanzhen Tan, Wei Jin, Yuechuan Lin, Yun Qi, and Hoi Lut Ho
Opt. Lett. 41(13) 3025-3028 (2016)

High-sensitivity gas pressure sensor based on hollow-core photonic bandgap fiber Mach-Zehnder interferometer

Chun Mao, Bo Huang, Ying Wang, Yijian Huang, Longfei Zhang, Yu Shao, and Yiping Wang
Opt. Express 26(23) 30108-30115 (2018)

Hollow-core anti-resonant fiber based light-induced thermoelastic spectroscopy for gas sensing

Yufei Ma, Wei Feng, Shunda Qiao, Zixu Zhao, ShouFei Gao, and YingYing Wang
Opt. Express 30(11) 18836-18844 (2022)

All-fiber gas sensor with intracavity photothermal spectroscopy

Yan Zhao, Wei Jin, Yuechuan Lin, Fan Yang, and Hoi Lut Ho
Opt. Lett. 43(7) 1566-1569 (2018)