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Chemical sensing with pulsed QC-DFB lasers operating at 15.6 micrometers
A A Kosterev1, R F Curl, F K Tittel
1Rice Quantum Institute, Rice University, Houston, TX 77251-1892, USA. akoster@rice.edu
Applied Physics. B, Lasers and Optics
|February 26, 2003
Abstract:
Pulsed thermoelectrically cooled QC-DFB lasers operating at 15.6 micrometers 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.