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 | |
| 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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Anzai, K., Gao, X., Sasada, H., & Yoshida, N. (2006). Narrow lamb dip of 3.4 μm band transition of methane with difference frequency generation and enhancement cavity. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 45(4 A), 2771-2775. https://doi.org/10.1143/JJAP.45.2771