Chemical sensing with pulsed QC-DFB lasers operating at 15.6 micrometers |
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| Authors: | Kosterev A A Curl R F Tittel F K Rochat M Beck M Hofstetter D Faist J |
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| Affiliation: | (1) Rice Quantum Institute, Rice University, Houston, TX 77251-1892, USA, US;(2) Physics Institute, University of Neuchatel, Breguet 1, 2000 Neuchatel, Switzerland, CH |
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| Abstract: | Pulsed thermoelectrically cooled QC-DFB lasers operating at 15.6 μm were characterized for spectroscopic gas sensing applications. A new method for wavelength scanning based on repetition rate modulation was developed. A non-wavelength-selective pyroelectric detector was incorporated in the sensor configuration giving the advantage of room-temperature operation and low cost. Absorption lines of CO2 and H2O were observed in ambient air, providing information about the concentration of these species. Received: 29 April 2002 / Published online: 21 August 2002 RID="*" ID="*"Corresponding author. Fax: +1-713/348-5686, E-mail: akoster@rice.edu |
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| Keywords: | PACS: 42.62.-b 82.80.Gk 82.80.Ha |
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