Method of Registration and Analysis of Spectra Obtained by Infrared Quantum-Cascade Laser

The work introduces a method of registration and analysis of the transmission spectra obtained by Quantum Cascade Laser (QCL). We describe an experimental facility for registration of the IR transmission spectra using QCL and give examples of the obtained experimental spectra of test substances. We also deal with a method for identification and concentration of substances using experimental data. Furthermore, we estimate the error of concentration recovery of several test substances and compare the results obtained with the results of another method of spectral quantitative analysis. Results suggest that in the concentration range studied, the difference in the calculated values of concentrations does not exceed 3σ. Based on the studies carried out, a conclusion is made about the effectiveness of the proposed method of registering and analyzing the infrared transmission spectra for solving problems of remote identification and recovery of concentrations of various substances

This work was supported by the Russian Foundation for Basic Research (grant no. 16-29-09625)

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