Title

Quantum cascade laser intracavity absorption spectrometer for trace gas sensing

Authors

Authors

A. V. Muraviev; D. E. Maukonen; C. J. Fredricksen; G. Medhi;R. E. Peale

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

SEMICONDUCTOR-LASERS; SPECTROSCOPY; Physics, Applied

Abstract

A mid-infrared intracavity laser absorption spectrometer for trace gas sensing is demonstrated. An external-cavity multi-mode quantum cascade laser with central wavelength 8.0 mu m was combined with a scanning Fabry-Perot interferometer, which analyzed the change of the laser emission spectrum caused by introducing an analyte inside the cavity. The detection mechanism is based on monitoring the laser spectrum dynamics at adiabatically changing laser conditions in long pulse operation mode. Fast acquisition and vapor exchange allow nearly real-time analyte detection. Sensitivity at the level of 1 x 10(-5) cm(-1) was demonstrated based on a weak water vapor absorption line. (C) 2013 AIP Publishing LLC.

Journal Title

Applied Physics Letters

Volume

103

Issue/Number

9

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

4

WOS Identifier

WOS:000323846900011

ISSN

0003-6951

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