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

doi:10.1143/JJAP.45.2771

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	2771-2775
Number of pages	5
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	45
Issue number	4 A
DOIs	https://doi.org/10.1143/JJAP.45.2771
Publication status	Published - 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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10.1143/JJAP.45.2771

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Narrow lamb dip of 3.4 μm band transition of methane with difference frequency generation and enhancement cavity. / Anzai, Kenji; Gao, Xiaoming; Sasada, Hiroyuki; Yoshida, Naohiro.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 45, No. 4 A, 07.04.2006, p. 2771-2775.

Research output: Contribution to journal › Article › peer-review

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