Sub-Doppler spectroscopy of H218O at 1.4 μm

被引：0
|
作者：
G. Gagliardi
G. Rusciano
L. Gianfrani
机构：
[1] Istituto Nazionale per la Fisica della Materia,
[2] Dipartimento di Scienze Fisiche dell’Università“Federico II” di Napoli,undefined
[3] Via Cintia,undefined
[4] 80125 Napoli,undefined
[5] Italy (Fax: +39-081/676-346,undefined
[6] E-mail: gianfrani@na.infn.it),undefined
[7] Dipartimento di Scienze Ambientali della Seconda Università di Napoli,undefined
[8] Via Vivaldi,undefined
[9] 81100 Caserta,undefined
[10] Italy,undefined
来源：
Applied Physics B | 2000年 / 70卷
关键词：
PACS: 42.62.Fi; 42.55.Px; 33.20.Ea;
D O I：
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学科分类号：
摘要：
We performed saturated-absorption spectroscopy of H218O at 1.4 μm, using a low-power mirror-extended distributed-feedback diode laser. Although the rotational lines of the ν1+ν3 band investigated in this work had a small transition dipole moment, saturation was possible thanks to a short Fabry–Pérot cavity with a finesse of about 500. We investigated the sub-Doppler spectrum of the 212→111 line for different sample gas pressures. A pressure-broadening coefficient of 32.9±0.7 MHz/Torr was measured. We also evaluated the saturation intensity as well as the transition dipole moment. To our knowledge, the observed Lamb dip represents the first narrow resonance at 1.4 μm.
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页码：883 / 888
页数：5
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