Frequency-domain measurement of cavity ring-down spectroscopy

被引：1
作者：
Gao, XM
Sasada, H
Anzai, K
Yoshida, N
机构：
[1] Keio Univ, Fac Sci & Technol, Dept Phys, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan
[2] Tokyo Inst Technol, Dept Environm Sci & Technol, Interdisciplinary Grad Sch Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2005年 / 44卷 / 03期
关键词：
linewidth; cavity-enhanced spectroscopy; absorption spectroscopy; laser spectroscopy; trace gas detection; cavity ring-down spectroscopy; Fourier transform;
D O I：
10.1143/JJAP.44.1452
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have recorded the transmission spectrum of an optical cavity absorption cell filled with methane gas using a tunable continuous-wave light source in the mid-infrared region. To determine the absorption strength of the gas, we have measured the linewidth of the cavity fringe. This method corresponds to frequency-domain measurements of cavity ring-down spectroscopy (CRDS) because the linewidth is the Fourier transform of the photon lifetime from which the absorption strength is derived in CRDS. The absorption strengths determined from the present linewidth measurements indicate excellent agreements with both those derived from the transmittance measurements and those calculated from line parameters listed in the HITRAN 2004 database.
引用
收藏
页码：1452 / 1456
页数：5
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