Photopyroelectric technique for the measurement of optical properties of pure liquids

Authors

  • José Abraham Balderas López Instituto Politécnico Nacional
  • Joel Díaz-Reyes Instituto Politécnico Nacional-CIBA

DOI:

https://doi.org/10.47566/2023_syv36_1-230801

Keywords:

Photopyroelectric Technique, Optical Properties, Pure Liquids, Near Infrared

Abstract

Photopyroelectric technique, in the transmission configuration, was shown adequate for the measurement of the optical properties of pure liquids. The analytical scheme involves the scanning of the photopyroelectric signal as a function of the sample thickness. Optical absorption coefficients, at four wavelengths in the near infrared region (904 nm, 980 nm, 1310 nm, and 1550 nm), were measured for eight pure substances, distilled water and glycerol, among them. Strong optical absorption was obtained, particularly for pure liquids with a hydroxyl group in their molecular structure. In order to figure out about the influence of this chemical group on optical properties as function of the size of the molecule, optical absorption coefficient for a series of linear alcohols at 1550 nm was also measured.

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Optical absorption coefficient behavior (1550 nm) as a function of the molecular weight.

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Published

2023-09-28

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Section

Research Papers

How to Cite

Photopyroelectric technique for the measurement of optical properties of pure liquids. (2023). Superficies Y Vacío, 36, 230801. https://doi.org/10.47566/2023_syv36_1-230801