Narrow lamb dip of 3.4 μm band transition of methane with difference frequency generation and enhancement cavity

Kenji Anzai, Xiaoming Gao, Hiroyuki Sasada, Naohiro Yoshida

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We have developed a sub-Doppler-resolution spectrometer tunable in the 3.4 μm region on the basis of difference frequency generation and an enhancement cavity cell. The spectrometer has allowed us to record the Lamb dips of the V3 fundamental band of methane even with an IR power level of 3.9 μW, and the linewidth of the Lamb dips can be as narrow as 0.33 MHz. The spectrometer is also so sensitive that a Lamb dip of a less abundant isotopomer, 13CH4, has been successfully observed.

Original languageEnglish
Pages (from-to)2771-2775
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number4 A
DOIs
Publication statusPublished - 2006 Apr 7

Keywords

  • Cavity-enhanced spectroscopy
  • Difference frequency generation
  • Laser spectroscopy
  • Linewidth
  • Methane
  • Mid-IR
  • Saturation spectroscopy

ASJC Scopus subject areas

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

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