Ultra-sensitive cavity ring-down spectroscopy in the mid-infrared spectral region

被引：37

作者：

Long, D. A. ^{[1
]}

Fleisher, A. J. ^{[1
]}

Liu, Q. ^{[1
]}

Hodges, J. T. ^{[1
]}

机构：

[1] NIST, Mat Measurement Lab, Gaithersburg, MD 20899 USA

来源：

OPTICS LETTERS | 2016年 / 41卷 / 07期

关键词：

LASER; STABILIZATION; SPECTROMETER;

D O I：

10.1364/OL.41.001612

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We describe an ultra-sensitive cavity ring-down spectrometer which operates in the mid-infrared spectral region near 4.5 mu m. With this instrument a noise-equivalent absorption coefficient of 2.6 x 10(-11) cm(-1) Hz(-1/2) was demonstrated with less than 150 nW of optical power incident on the photodetector. Quantum noise was observed in the individual ring-down decay events, leading to quantum-noise-limited short-time performance. We believe that this spectrometer's combination of high sensitivity and robustness make it well suited for measurements of ultra-trace gas species as well as applications in optics and fundamental physics.

引用

页码：1612 / 1615

页数：4

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