Related Experiment Video
Updated: Oct 2, 2026
Façade-Level Monitoring of CO2 Variability under Urban Heat Island Conditions using Low-Cost Sensor Data Loggers
Published on: December 12, 2025
Thermoelectrically cooled quantum-cascade-laser-based sensor for the continuous monitoring of ambient atmospheric
Anatoliy A Kosterev1, Frank K Tittel, Rüdeger Köhler
1Rice Quantum Institute, Rice University, Houston, Texas 77251-1892, USA. akoster@rice.edu
Abstract:
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).
