Highly sensitive cavity-enhanced sub-doppler spectroscopy of a molecular overtone band with a 1.66 μm tlinable diode laser

Chikako Ishibashi, Hiroyuki Sasada

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Sensitive sub-Doppler resolution molecular spcctroscopy developed by Hall and co-workers [J. Opt. Soc. Am. B 15 (1998) 6] has been applied to the 1.66μm region using a widely tunable external-cavity diode laser. We have recorded saturated absorption spectra of the 2v 3vibrational overtone band of methane with a sensitivity of 9.5 × 10 -11 cm -1 at a time constant of 1.25s and a spectral linewidth of 320 kHz (full width at half maximun; FWHM) over the tunable range of 1.63 to 1.68μm.

Original languageEnglish
Pages (from-to)920-922
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number2 A
Publication statusPublished - 1999 Dec 1



  • Diode laser spectroscopy
  • Fm spectroscopy
  • Infrared spectroscopy
  • Saturation spectroscopy
  • Sensitive spectroscopy

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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