Abstract

We report a novel, to the best of our knowledge, photoacoustic spectrometer for trace gas sensing of benzene. A quantum cascade laser emitting at the wavelength 14.8 µm is used as the light source in the spectroscopic detection. This wavelength region contains the strongest vibrational band of benzene, which is free of spectral overlap from common trace gases, making it a strong candidate for sensitive benzene detection. Cantilever-enhanced photoacoustic spectroscopy is used for detection. This simple and robust measurement setup can reach a benzene detection limit below 1 ppb.

© 2020 Optical Society of America

Enhancement of photoacoustic spectroscopy with sorption enrichment for ppt-level benzene detection

Juho Karhu and Tuomas Hieta
Appl. Opt. 61(8) 1892-1897 (2022)

Radiocarbon dioxide detection using cantilever-enhanced photoacoustic spectroscopy

Mehr Fatima, Thomas Hausmaninger, Teemu Tomberg, Juho Karhu, Markku Vainio, Tuomas Hieta, and Guillaume Genoud
Opt. Lett. 46(9) 2083-2086 (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)

Sub-ppb-level CH₄ detection by exploiting a low-noise differential photoacoustic resonator with a room-temperature interband cascade laser

Huadan Zheng, Yihua Liu, Haoyang Lin, Ruifeng Kan, Pietro Patimisco, Angelo Sampaolo, Marilena Giglio, Wenguo Zhu, Jianhui Yu, Frank K Tittel, Vincenzo Spagnolo, and Zhe Chen
Opt. Express 28(13) 19446-19456 (2020)

Parts-per-trillion-level detection of nitrogen dioxide by cantilever-enhanced photo-acoustic spectroscopy

Jari Peltola, Tuomas Hieta, and Markku Vainio
Opt. Lett. 40(13) 2933-2936 (2015)