Thermoelectrically cooled quantum-cascade-laser-based sensor for the continuous monitoring of ambient atmospheric carbon monoxide.
We report the first application of a thermoelectrically cooled, distributed-feedback quantum-cascade laser for continuous spectroscopic monitoring of CO in ambient air at a wavelength of 4.6 microm. A noise-equivalent detection limit of 12 parts per billion was demonstrated experimentally with a 102-cm optical pathlength and a 2.5-min data acquisition time at a 10-kHz pulsed-laser repetition rate. This sensitivity corresponds to a standard error in fractional absorbance of 3 x 10(-5).
Kosterev
Anatoliy A
AA
Rice Quantum Institute, Rice University, Houston, Texas 77251-1892, USA. akoster@rice.edu
Tittel
Frank K
FK
Köhler
Rüdeger
R
Gmachl
Claire
C
Capasso
Federico
F
Sivco
Deborah L
DL
Cho
Alfred Y
AY
Wehe
Shawn
S
Allen
Mark G
MG
D001272:Atmosphere; D002248:Carbon Monoxide; D003080:Cold Temperature; D004560:Electricity; D004784:Environmental Monitoring / Q000295:instrumentation*; D007834:Lasers; D008962:Models, Theoretical
D002248:Carbon Monoxide