Kinetics of water transfer and stress relaxation in cartilage heated with 1.56-um fiber laser

Victor N. Bagratashvili; Alexander P. Sviridov; Emil N. Sobol; Alexander I. Omelchenko; Svetlana I. Tsypina; Valentin P. Gapontsev; Igor E. Samartsev; Felix I. Feldchtein; Roman V. Kuranov

doi:10.1117/12.388027

13 June 2000 Kinetics of water transfer and stress relaxation in cartilage heated with 1.56-μm fiber laser

Victor N. Bagratashvili, Alexander P. Sviridov, Emil N. Sobol, Alexander I. Omelchenko, Svetlana I. Tsypina, Valentin P. Gapontsev, Igor E. Samartsev, Felix I. Feldchtein, Roman V. Kuranov

Author Affiliations +

Proceedings Volume 3914, Laser-Tissue Interaction XI: Photochemical, Photothermal, and Photomechanical; (2000) https://doi.org/10.1117/12.388027
Event: BiOS 2000 The International Symposium on Biomedical Optics, 2000, San Jose, CA, United States

Abstract

In this work we have used for the first time 1.56 micrometer fiber laser to study mechanisms of IR laser induced stress relaxation in cartilage. We have applied several in-situ monitoring techniques: local temperature measurements (IR radiometry and thermocouple), IR-light absorption, direct stress measurements, micro-balancing, visible light scattering and optical coherent tomography. We have measured temporal behavior of 1.56 micrometer laser light transmission through the cartilage sample at different intensities with synchronous temperature and stress monitoring. The observed bleaching effect (self-induced transparency) is caused by water release from irradiating zone, water evaporation from the cartilage surface and, also, by temperature shift and decrease of intensity of water absorption bands.

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Victor N. Bagratashvili, Alexander P. Sviridov, Emil N. Sobol, Alexander I. Omelchenko, Svetlana I. Tsypina, Valentin P. Gapontsev, Igor E. Samartsev, Felix I. Feldchtein, and Roman V. Kuranov "Kinetics of water transfer and stress relaxation in cartilage heated with 1.56-μm fiber laser", Proc. SPIE 3914, Laser-Tissue Interaction XI: Photochemical, Photothermal, and Photomechanical, (13 June 2000); https://doi.org/10.1117/12.388027

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