Abstract

A pulsed quantum-cascade distributed-feedback laser, temperature tunable from 41°C to +31.6°C, and a resonant differential photoacoustic detector are used to measure trace-gas concentrations to as low as 66 parts per 109 by volume (ppbv) ammonia at a low laser power of 2  mW. Good agreement between the experimental spectrum and the simulated HITRAN spectrum of NH3 is found in the spectral range between 1046 and 1052  cm1. A detection limit of 30  ppbv ammonia at a signal-to-noise ratio of 1 was obtained with the quantum-cascade laser (QCL) photoacoustic (PA) setup. Concentration changes of 50  ppbv were detectable with this compact and versatile QCL-based PA detection system. The performance of the PA detector, characterized by the product of the incident laser power and the minimum detectable absorption coefficient, was 4.7×109  W  cm1.

© 2006 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Pulsed quantum cascade laser-based cavity ring-down spectroscopy for ammonia detection in breath

Jagadeeshwari Manne, Oleksandr Sukhorukov, Wolfgang Jäger, and John Tulip
Appl. Opt. 45(36) 9230-9237 (2006)

Atmospheric ammonia measurement using a VUV/photo-fragmentation laser-induced fluorescence technique

John S. Schendel, Robert E. Stickel, Cornelis A. van Dijk, Scott T. Sandholm, Douglas D. Davis, and John D. Bradshaw
Appl. Opt. 29(33) 4924-4937 (1990)

Effects of adsorption–desorption processes on the response time and accuracy of photoacoustic detection of ammonia

Andreas Schmohl, Andras Miklos, and Peter Hess
Appl. Opt. 40(15) 2571-2578 (2001)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription