Intracavity Helium-Neon Laser Photothermal Deflection as a Sensitive Technique for Trace Gas Analysis
- 1 November 1986
- journal article
- research article
- Published by SAGE Publications in Applied Spectroscopy
- Vol. 40 (8) , 1108-1110
- https://doi.org/10.1366/0003702864507837
Abstract
A novel, compact, ultrasensitive, and inexpensive He-Ne laser intracavity photothermal deflection spectrometer has been developed. In this apparatus a gas sample is placed inside a cavity of the He-Ne laser, which serves as a probe laser. A CO2 excitation laser coaxially overlaps with the He-Ne laser beam inside the sample cell. The detection limit for ethanol vapor in air at 1 atm excited with 1.5 W of CO2 laser chopped at 13.3 Hz is estimated to be 2.5 ppb.Keywords
This publication has 16 references indexed in Scilit:
- Intracavity absorption line profiles: a comment on the observed symmetryApplied Optics, 1985
- Laser intracavity photothermal beam deflection spectroscopyAnalytical Chemistry, 1984
- Quantitative photothermal deflection spectroscopy in a flowing stream of gasApplied Optics, 1984
- Intracavity dye-laser photothermal deflection spectroscopyReview of Scientific Instruments, 1983
- Fabry–Perot photothermal trace detectionApplied Physics Letters, 1982
- Photothermal deflection spectroscopy and detectionApplied Optics, 1981
- Lasers in Chemical AnalysisPublished by Springer Nature ,1981
- Sensitive i n s i t u trace-gas detection by photothermal deflection spectroscopyApplied Physics Letters, 1980
- Trace detection in gases using phase fluctuation optical heterodyne spectroscopyApplied Physics Letters, 1980
- Ultrasensitive response of a CW dye laser to selective extinctionIEEE Journal of Quantum Electronics, 1972