Abstract

Diode-laser second-derivative modulation spectrometry is a simple means of measuring trace concentrations of small molecules in the gas phase. For a setup with a reference cell used both for laser frequency locking and as a concentration standard, the calibration algorithm is developed for the general case of nonvanishing nonlinear terms in the power expansion of Beer’s law in both the sample and reference channel. A practical example is given.

© 1984 Optical Society of America

Application of tunable diode laser absorption for trace stratospheric measurements of HCl: laboratory results

Alan Fried, Robert Sams, and Walter W. Berg
Appl. Opt. 23(11) 1867-1880 (1984)

Improving analysis from second-derivative uv-absorption spectrometry

Alan R. Hawthorne and John H. Thorngate
Appl. Opt. 17(5) 724-729 (1978)

Errors in spectroscopic measurements of SO₂ due to nonexponential absorption of laser radiation, with application to the remote monitoring of atmospheric pollutants

D. J. Brassington, R. C. Felton, B. W. Jolliffe, B. R. Marx, J. T. M. Moncrieff, W. R. C. Rowley, and P. T. Woods
Appl. Opt. 23(3) 469-475 (1984)

Optoacoustic measurement of HCl specific absorption coefficients at DF laser wavelengths

Gabriele Krüger
Appl. Opt. 21(15) 2841-2844 (1982)

Evaluation of the DIAL technique for studies on NO₂ using a mobile lidar system

Kent A. Fredriksson and Hans M. Hertz
Appl. Opt. 23(9) 1403-1411 (1984)