Optical properties of CO2 in the vicinity of critical point

Victor N. Bagratashvili; Kirill P. Bestemyanov; Vyacheslav M. Gordienko; A. N. Konovalov; Vladimir K. Popov; Svetlana I. Tsypina

doi:10.1117/12.469001

31 May 2002 Optical properties of CO₂ in the vicinity of critical point

Victor N. Bagratashvili, Kirill P. Bestemyanov, Vyacheslav M. Gordienko, A. N. Konovalov, Vladimir K. Popov, Svetlana I. Tsypina

Author Affiliations +

Proceedings Volume 4705, Saratov Fall Meeting 2001: Coherent Optics of Ordered and Random Media II; (2002) https://doi.org/10.1117/12.469001
Event: Saratov Fall Meeting 2001, 2001, Saratov, Russian Federation

Abstract

Optical properties of carbon dioxide in the vicinity of its critical point were studied. Amplitude-frequency characteristics of radiation backscattered in CO₂ have been studied using laser Doppler velocimeter based on highly stabilized Nd:YAG³⁺ chip-laser. Significant (up to 10 times) narrowing of backscattered radiation spectrum and increasing of its amplitude (up to 100 times) in the vicinity of critical point were detected and analyzed. Nonlinear temperature dependence of reflection from glass- CO₂ interface was observed. Intrinsic anomaly of light reflection of critical media was revealed. Transmission spectrum of cell with critical CO₂ was measured in 0.35- 1 micrometers spectral range. Formula for integral spectrum of light scattered in near-critical medium was obtained.

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Victor N. Bagratashvili, Kirill P. Bestemyanov, Vyacheslav M. Gordienko, A. N. Konovalov, Vladimir K. Popov, and Svetlana I. Tsypina "Optical properties of CO₂ in the vicinity of critical point", Proc. SPIE 4705, Saratov Fall Meeting 2001: Coherent Optics of Ordered and Random Media II, (31 May 2002); https://doi.org/10.1117/12.469001

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