Quantum-noise-limited cavity ring-down spectroscopy

被引：27
|
作者：
Long, D. A. [1 ]
Fleisher, A. J. [1 ]
Wojtewicz, S. [1 ,2 ]
Hodges, J. T. [1 ]
机构：
[1] NIST, Gaithersburg, MD 20899 USA
[2] Nicholas Copernicus Univ, Fac Phys Astron & Informat, Inst Phys, PL-87100 Torun, Poland
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2014年 / 115卷 / 02期
关键词：
SINGLE MOLECULES; SPECTROMETER; SENSITIVITY; ABSORPTION;
D O I：
10.1007/s00340-014-5808-z
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate a heterodyne-detected cavity ring-down spectroscopy (CRDS) method that allows for a noise-equivalent absorption coefficient of 6 x 10(-14) cm(-1) Hz(-1/2), the lowest which has been reported in a CRDS measurement. It is shown that heterodyne-detected CRDS also reaches the quantum noise limit at reasonable optical powers. In addition to offering ultra-high sensitivity, this technique provides high frequency agility over a range of 2 THz in the near-infrared, which allows entire absorption bands to be recorded in minutes. As a demonstration experiment, high resolution spectra of a near-infrared carbon dioxide band have been recorded.
引用
收藏
页码：149 / 153
页数：5
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