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Optics Letters

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  • Vol. 25, Iss. 14 — Jul. 15, 2000
  • pp: 1040–1042

Sensitive H2 detection by use of thermal-lens Raman spectroscopy without a tunable laser

Yuji Oki, Shinichiro Nakazono, Yuji Nonaka, and Mitsuo Maeda  »View Author Affiliations


Optics Letters, Vol. 25, Issue 14, pp. 1040-1042 (2000)
http://dx.doi.org/10.1364/OL.25.001040


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Abstract

A new nonlinear Raman spectroscopy technique for trace-gas detection was proposed and demonstrated. The technique involved the use of a thermal-lens detection scheme to monitor thermal emission from the stimulated Raman process. We termed this technique thermal-lens Raman spectroscopy, and it was combined with a novel scheme involving a nonlinear Raman spectroscopy without a tunable laser. This technique was applied to detecting trace hydrogen molecules in the atmosphere by use of a pulsed Nd:YAG laser and a continuous-wave He–Ne probe laser. A detection limit of 9 parts in 106 was attained.

© 2000 Optical Society of America

OCIS Codes
(170.5660) Medical optics and biotechnology : Raman spectroscopy
(190.4180) Nonlinear optics : Multiphoton processes
(290.5910) Scattering : Scattering, stimulated Raman
(300.6390) Spectroscopy : Spectroscopy, molecular
(350.6830) Other areas of optics : Thermal lensing

Citation
Yuji Oki, Shinichiro Nakazono, Yuji Nonaka, and Mitsuo Maeda, "Sensitive H2 detection by use of thermal-lens Raman spectroscopy without a tunable laser," Opt. Lett. 25, 1040-1042 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-14-1040


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References

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