HCOOH high-resolution spectroscopy in the 9.18 μm region

被引:13
作者
Bielsa, Franck [1 ,2 ]
Djerroud, Khelifa [3 ]
Goncharov, Andrei [3 ,4 ]
Douillet, Albane [1 ,2 ]
Valenzuela, Tristan [1 ,2 ]
Daussy, Christophe [3 ]
Hilico, Laurent [1 ,2 ]
Amy-Klein, Anne [3 ]
机构
[1] Univ Evry Essonne, Dept Phys & Modelisat, F-91025 Evry, France
[2] Univ Paris 06, CNRS, UMR 8552, Lab Kastler Brossel,EVRY,UPMC,ENS,C 74, F-75252 Paris, France
[3] Univ Paris 13, Phys Lasers Lab, CNRS, UMR 7538, F-93430 Villetaneuse, France
[4] Russian Acad Sci, Inst Laser Phys, Siberian Branch, Novosibirsk 630090, Russia
关键词
CO2; laser; quantum cascade laser; formic acid; saturated absorption; frequency measurement;
D O I
10.1016/j.jms.2007.10.003
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
We report on highly accurate absolute frequency measurement against a femtosecond frequency comb of six saturated absorption lines of formic acid (HCOOH) with an accuracy of 1 kHz. We also report the frequency measurement of 17 other lines with an accuracy of 2 kHz. Those lines are in quasi coincidence with the 9R(36) to 9R(42) CO2 laser emission lines and are probed either by a CO2 or a widely tunable quantum cascade laser phase locked to a master CO2 laser. The stability of HCOOH stabilized lasers is characterized by a fractional Allan deviation of 3.1 x 10(-12) tau-(1/2). They give suitable frequency references for H-2(+) Doppler-free two-photon spectroscopy. (c) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码:41 / 46
页数:6
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