Design of cavity-enhanced absorption cell for reducing transit-time broadening

被引：9

作者：

Abe, Masashi ^{[1
]}

Iwakuni, Kana ^{[1
]}

Okubo, Sho ^{[1
]}

Sasada, Hiroyuki ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Phys, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

来源：

OPTICS LETTERS | 2014年 / 39卷 / 18期

关键词：

FREQUENCY LIST; SPECTROSCOPY; METHANE; RESOLUTION; BAND; LINE;

D O I：

10.1364/OL.39.005277

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

To reduce the linewidth of Lamb dips, we introduce a cavity-enhanced absorption cell (CEAC) coupled with a Gaussian beam with a 1.9-mm 1/e(2) radius at the beam waist for the reduction of transit-time broadening. We state that transit-time broadening depends only on the beam radius at the beam waist. This fact is useful for the design of the CEAC, and a pair of concave and convex mirrors is thereby employed. We have carried out sub-Doppler resolution spectroscopy of the nu(3) band of CH4 and the nu(1) band of CH3D using a difference-frequency-generation source and the CEAC, and the recorded Lamb dips narrow to 80 kHz (HWHM). (C) 2014 Optical Society of America

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收藏

页码：5277 / 5280

页数：4

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