Share Email Print
cover

Proceedings Paper

Causality relations in analysis of diffuse reflectance spectra obtained by infrared quantum cascade laser
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

We present the technique and experimental laboratory setup for measuring and analysis of diffuse reflectance spectra obtained by tunable infrared quantum cascade laser with an average power of 15 mW. Using causality relations for real and imaginary part of reflectivity we can calculate extinction coefficient. We use the dumped harmonic oscillator model to calculate synthetic spectra and test Kramers – Kronig relations for spectra calculations. To improve the accuracy of calculated extinction spectra we apply extrapolation of experimental spectra and phase correction. Using experimental setup and numerical methods of spectra analysis we could identify the powder of 30 μg of Acetylsalicylic acid and 40 μg of L-Tyrosine.

Paper Details

Date Published: 12 March 2020
PDF: 12 pages
Proc. SPIE 11441, 2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications, 114410G (12 March 2020); doi: 10.1117/12.2549554
Show Author Affiliations
I. L. Fufurin, Bauman Moscow State Technical Univ. (Russian Federation)
A. S. Tabalina, Bauman Moscow State Technical Univ. (Russian Federation)
A. N. Morozov, Bauman Moscow State Technical Univ. (Russian Federation)
Ig. S. Golyak, Bauman Moscow State Technical Univ. (Russian Federation)
S. I. Svetlichnyi, N.N. Semenov Federal Research Ctr. for Chemical Physics (Russian Federation)


Published in SPIE Proceedings Vol. 11441:
2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications
Cunlin Zhang; Xi-Cheng Zhang; Zhiming Huang, Editor(s)

© SPIE. Terms of Use
Back to Top
PREMIUM CONTENT
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?
close_icon_gray