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

页码：149 / 153

页数：5

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