Abstract

A high-precision fiber-optic photoacoustic (PA) gas sensor with temperature self-compensation is reported. The target gas diffuses into a micro-chamber and absorbs the laser energy to generate a PA signal, which is detected by a Fabry–Perot interferometric cantilever. The temperature affects not only the acoustic sensitivity of the cantilever, but also the PA conversion efficiency. The test result of the PA frequency response demonstrates that there is a temperature-insensitive operating frequency of 1208.4 Hz in the range of 0–80°C. The temperature self-compensated measurement was realized by setting the laser modulation frequency to 604.2 Hz and using the second-harmonic detection technique.

© 2020 Optical Society of America

Highly sensitive photoacoustic gas sensor with micro-embedded acoustic resonator for gas leakage detection

Bo Zhang, Yunjiang Jia, Benlei Zhao, Xiaosong Zhu, and Yiwei Shi
Opt. Lett. 48(16) 4201-4204 (2023)

Fiber-optic photoacoustic sensor for remote monitoring of gas micro-leakage

Ke Chen, Min Guo, Shuai Liu, Bo Zhang, Hong Deng, Yonghao Zheng, Yewei Chen, Chen Luo, Li Tao, Mingqi Lou, and Qingxu Yu
Opt. Express 27(4) 4648-4659 (2019)

Ultracompact optical fiber acoustic sensors based on a fiber-top spirally-suspended optomechanical microresonator

Mian Yao, Yangxi Zhang, Xia Ouyang, A. Ping Zhang, Hwa-Yaw Tam, and P. K. A. Wai
Opt. Lett. 45(13) 3516-3519 (2020)

Temperature-compensated optical fiber sensor for volatile organic compound gas detection based on cholesteric liquid crystal

Jianyang Hu, Yuzhou Chen, Zhenyu Ma, Li Zeng, Dong Zhou, Zenghui Peng, Weimin Sun, and Yongjun Liu
Opt. Lett. 46(14) 3324-3327 (2021)

Portable broadband photoacoustic spectroscopy for trace gas detection by quantum cascade laser arrays

Chien-Sheng Liao, Romain Blanchard, Christian Pfluegl, Masud Azimi, Fred Huettig, and Daryoosh Vakhshoori
Opt. Lett. 45(12) 3248-3251 (2020)