Chemical sensing with pulsed QC-DFB lasers operating at 15.6 micrometers.
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.
Kosterev
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AA
Rice Quantum Institute, Rice University, Houston, TX 77251-1892, USA. akoster@rice.edu
Curl
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RF
Tittel
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FK
Rochat
M
M
Beck
M
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Hofstetter
D
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Faist
J
J
D001272:Atmosphere / Q000737:chemistry*; D002245:Carbon Dioxide / Q000032:analysis*; D004560:Electricity; D004784:Environmental Monitoring / Q000295:instrumentation*; D004867:Equipment Design; D005740:Gases / Q000032:analysis; D007834:Lasers; D011789:Quantum Theory; D013055:Spectrophotometry, Infrared / Q000295:instrumentation; D014867:Water / Q000032:analysis*
D005740:Gases; D014867:Water; D002245:Carbon Dioxide