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

Yuji Oki, Shinichiro Nakazono, Yuji Nonaka, Mitsuo Maeda

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10 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1040-1042
Number of pages3
JournalOptics Letters
Issue number14
Publication statusPublished - Jul 15 2000


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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