Model propagation of a femtosecond laser radiation in the vitreous of the human eye

P. Y. Rogov; V. G. Bespalov

doi:10.1117/12.2229542

21 April 2016 Model propagation of a femtosecond laser radiation in the vitreous of the human eye

P. Y. Rogov, V. G. Bespalov

Author Affiliations +

Proceedings Volume 9917, Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS); 99170F (2016) https://doi.org/10.1117/12.2229542
Event: Saratov Fall Meeting 2015, 2015, Saratov, Russian Federation

Abstract

The paper presents a mathematical model of linear and nonlinear processes occurring due to propagation of femtosecond laser pulses in vitreous of the human eye. By methods of numerical simulation, we have solved a nonlinear spectral equation describing dynamics of two-dimensional TE-polarized radiation. The solution was performed in a homogeneous isotropic medium with instantaneous cubic nonlinearity without using slowly varying envelope approximation. For simulation we used medium with parameters close to the optical media of the eye. The model of femtosecond radiation takes into account the dynamics of the process of dispersion pulse broadening in time and occurrence of self-focusing of the retina when passing through vitreous body of the eye. The dependence between pulse duration on the retina and duration of the input pulse was found, as well as the values of power density at which self-focusing occurs. It was shown that the main mechanism of radiation damage caused while using Ti-sapphire laser is photoionization. The results coincide with the results obtained by other scientists. They can be used to create Russian laser safety standards for femtosecond laser systems.

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P. Y. Rogov and V. G. Bespalov "Model propagation of a femtosecond laser radiation in the vitreous of the human eye", Proc. SPIE 9917, Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS), 99170F (21 April 2016); https://doi.org/10.1117/12.2229542

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KEYWORDS

Eye

Retina

Femtosecond phenomena

Vitreous

Refractive index

Eye models

Mathematical modeling

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