Real-time multiplexed digital cavity-enhanced spectroscopy

被引：4

作者：

Boyson, Toby K. ^{[1
]}

Dagdigian, Paul J. ^{[2
]}

Pavey, Karl D. ^{[3
]}

Fitzgerald, Nicholas J. ^{[3
]}

Spence, Thomas G. ^{[4
]}

Moore, David S. ^{[5
]}

Harb, Charles C. ^{[1
]}

机构：

[1] UNSW Australia, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia

[2] Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA

[3] Def Sci & Technol Org, Melbourne, Vic 3207, Australia

[4] Belmont Univ, Coll Sci & Math, Nashville, TN 37212 USA

[5] Los Alamos Natl Lab, Shock & Detonat Phys Grp, Los Alamos, NM 87545 USA

来源：

OPTICS LETTERS | 2015年 / 40卷 / 19期

基金：

澳大利亚研究理事会;

关键词：

RING-DOWN SPECTROSCOPY; QUANTUM CASCADE LASER;

D O I：

10.1364/OL.40.004560

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Cavity-enhanced spectroscopy is a sensitive optical absorption technique but one where the practical applications have been limited to studying small wavelength ranges. This Letter shows that wideband operation can be achieved by combining techniques usually reserved for the communications community with that of cavity-enhanced spectroscopy, producing a multiplexed real-time cavity-enhanced spectrometer. We use multiple collinear laser sources operating asynchronously and simultaneously while being detected on a single photodetector. This is synonymous with radio frequency (RF) cellular systems in which signals are detected on a single antenna but decoded uniquely. Here, we demonstrate results with spectra of methyl salicylate and show parts-per-billion per root hertz sensitivity measured in real-time. (C) 2015 Optical Society of America

引用

页码：4560 / 4562

页数：3

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