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

被引：8
作者：
Anzai, K
Gao, XM
Sasada, H
Yoshida, N
机构：
[1] Keio Univ, Fac Sci & Technol, Dept Phys, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan
[2] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Environm Sci & Technol, Midori Ku, Yokohama, Kanagawa 2268502, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2006年 / 45卷 / 4A期
关键词：
saturation spectroscopy; cavity-enhanced spectroscopy; laser spectroscopy; difference frequency generation; methane; mid-IR; linewidth;
D O I：
10.1143/JJAP.45.2771
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have developed a sub-Doppler-resolution spectrometer tunable in the 3.4 mu m 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 nu(3) fundamental C band of methane even with an IR power level of 3.9 mu W, 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 isotoporner, (CH4)-C-13, has been Successfully observed.
引用
收藏
页码：2771 / 2775
页数：5
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