High-resolution cavity ringdown spectroscopy with a Fabry-Perot etalon at the cavity output

Yong Shim Yoo, Jae Wan Kim, Jae Yong Lee, Jae Won Hahn

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We demonstrate a cavity ringdown spectrometer that affords a frequency resolution higher than the conventional limit imposed by the bandwidth of a pulsed laser source. A Fabry-Perot etalon at the exit of a ringdown cavity disperses the frequency components of a broadband ringdown signal spatially, permitting a narrow-linewidth spectral measurement based on single-exponential decay signals. A proof of principle experiment is presented with the P(9) transition of the [50]_10000 band of C2H2. This technique is expected to be useful for in situ monitoring molecular concentration.

Original languageEnglish
Pages (from-to)528-534
Number of pages7
JournalChemical Physics Letters
Issue number5-6
Publication statusPublished - 2000 Nov 17


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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