Next Article in Journal / Special Issue
ZnO:Al Thin Film Gas Sensor for Detection of Ethanol Vapor
Previous Article in Journal
Recent Electrochemical and Optical Sensors in Flow-Based Analysis
Previous Article in Special Issue
Surface Science Studies of Gas Sensing Materials: SnO2
Article Menu

Export Article

Open AccessReview
Sensors 2006, 6(10), 1411-1419;

Photoacoustic Spectroscopy with Quantum Cascade Lasers for Trace Gas Detection

LIT3 CNR-INFM Regional Laboratory, Department of Physics, University of Bari, Bari, Italy
Author to whom correspondence should be addressed.
Received: 4 October 2006 / Accepted: 25 October 2006 / Published: 27 October 2006
(This article belongs to the Special Issue Gas Sensors)
Full-Text   |   PDF [76 KB, uploaded 21 June 2014]


Various applications, such as pollution monitoring, toxic-gas detection, noninvasive medical diagnostics and industrial process control, require sensitive and selectivedetection of gas traces with concentrations in the parts in 109 (ppb) and sub-ppb range.The recent development of quantum-cascade lasers (QCLs) has given a new aspect toinfrared laser-based trace gas sensors. In particular, single mode distributed feedback QCLsare attractive spectroscopic sources because of their excellent properties in terms of narrowlinewidth, average power and room temperature operation. In combination with these lasersources, photoacoustic spectroscopy offers the advantage of high sensitivity and selectivity,compact sensor platform, fast time-response and user friendly operation. This paper reportsrecent developments on quantum cascade laser-based photoacoustic spectroscopy for tracegas detection. In particular, different applications of a photoacoustic trace gas sensoremploying a longitudinal resonant cell with a detection limit on the order of hundred ppb ofozone and ammonia are discussed. We also report two QC laser-based photoacousticsensors for the detection of nitric oxide, for environmental pollution monitoring andmedical diagnostics, and hexamethyldisilazane, for applications in semiconductormanufacturing process. View Full-Text
Keywords: photoacoustic spectroscopy; quantum cascade laser; trace gas detection. photoacoustic spectroscopy; quantum cascade laser; trace gas detection.
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Elia, A.; Di Franco, C.; Lugarà, P.M.; Scamarcio, G. Photoacoustic Spectroscopy with Quantum Cascade Lasers for Trace Gas Detection. Sensors 2006, 6, 1411-1419.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top