Abstract

Photoacoustic measurements have been made at the 4.803 μm absorption line of carbon monoxide in a small nonresonant cell using a low power semiconductor laser source. A simple theoretical model correctly predicts the dependence of the CO signal on chopping frequency and concentration dependence but is inadequate in describing the pressure dependence. Concentrations as low as 50 ppmv were measured by operating the cell in a double pass mode.

Tunable diode laser absorption spectroscopy of carbon monoxide around 2.35 μm

Jean-Christophe Nicolas, Alexei N. Baranov, Yvan Cuminal, Yves Rouillard, and Claude Alibert
Appl. Opt. 37(33) 7906-7911 (1998)

Long-Path Monitoring of Atmospheric Carbon Monoxide with a Tunable Diode Laser System

R. T. Ku, E. D. Hinkley, and J. O. Sample
Appl. Opt. 14(4) 854-861 (1975)

Tunable diode-laser measurement of carbon monoxide concentration and temperature in a laminar methane–air diffusion flame

J. Houston Miller, Salma Elreedy, Bijan Ahvazi, F. Woldu, and P. Hassanzadeh
Appl. Opt. 32(30) 6082-6089 (1993)

Cavity-enhanced quantum-cascade laser-based instrument for carbon monoxide measurements

Robert Provencal, Manish Gupta, Thomas G. Owano, Douglas S. Baer, Kenneth N. Ricci, Anthony O’Keefe, and James R. Podolske
Appl. Opt. 44(31) 6712-6717 (2005)

Absorption Measurements of Carbon Monoxide Laser Radiation by Water Vapor

D. K. Rice
Appl. Opt. 12(2) 218-225 (1973)