Cavity-enhanced light-induced thermoelastic spectroscopy for trace-gas sensing
We report a trace gas sensing technique of cavity-enhanced light-induced thermoelastic spectroscopy (CE-LITES) with a Fabry-Pérot (F-P) optical cavity and a high-quality-factor resonant quartz tuning fork (QTF). Pound-Drever-Hall (PDH) locking method is used to lock the laser to the optical cavity. With only a short 9-cm optical cavity (finesse, ∼1283) and a tiny commercially available standard QTF (Q-factor, ∼38910), a CE-LITES sensor for acetylene detection was developed to demonstrate this technique, achieving a minimum detection limit (MDL) of 7.5 parts-per-billion (ppb) for a 216-s integration time and a normalized noise equivalent absorption (NNEA) coefficient of as low as 1.91 × 10<sup>-10 </sup>cm<sup>-1</sup>·W·Hz<sup>-1/2</sup>. The developed technique bears promising potential for sensitive and accurate measurement that is needed for studying trace gas-phase analyte.
Authors
- Jinguang Lv (ORCID: https://orcid.org/0009-0007-2474-2235)
- Dongqing Zhang (ORCID: https://orcid.org/0000-0001-5180-7419)
- Mengpeng Hu (ORCID: https://orcid.org/0000-0002-3537-3515)
- Hui Zhang (ORCID: https://orcid.org/0000-0002-1102-066X)
- Haoran Wang (ORCID: https://orcid.org/0000-0002-0769-600X)
- Qiang Wang (ORCID: https://orcid.org/0000-0002-8751-8093)
- Jingqiu Liang (ORCID: https://orcid.org/0000-0002-8078-5340)
- Hongqiang Fan
- Junfeng Zhou (ORCID: https://orcid.org/0009-0001-1528-1701)
Institutions
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Optics Express
- Published
- 2024-08-20
- DOI
- https://doi.org/10.1364/oe.536849
- Citations
- 24
- Primary Topic
- Spectroscopy and Laser Applications
- Type
- article
- Field-Weighted Citation Impact
- 5.78
Funders
- Natural Science Foundation of Jilin Province
- National Natural Science Foundation of China
- National Key Research and Development Program of China