Polarization-based characterization of laser thermal treatment on biological tissue

The field of biomedical optics is promising in medical praxis. The study of laser thermal treatment and polarization-based characterization of tissue under it can be utilized in the correction of certain disorders with good results

Физические основы низкотемпературной лазерной абляции биотканей: квазинепрерывный режим облучения

Applied to solving practical problems of extremely accurate laser surgery; the present study examines the conditions of deep, controlled, low-temperature dissection of biological tissues by quasi-continuous laser radiation of the infrared spectrum based on forming a directional wave of environmental enlightment.Применительно к решению практических задач особо точной лазерной хирургии в работе рассматриваются условия глубокого, регулируемого, низкотемпературного рассечения биологических тканей квазинепрерывным лазерным излучением инфракрасного диапазона спектра на основе формирования направленной волны просветления среды

Spatial-Temporal Dynamics of Light Beam Interactions in Nonlinear Interferometer

The work presents a theory of the optical beam interactions in interferometers with a non-linear resonant medium. The formation patterns for the light beam spatial structures in the conditions when the optical bistability mode is realized and symmetry breaking bifurcations are exhibited have been studied. The revealed features of a diffraction mechanism in the case of transverse interaction on two- and four-wave mixing have been analyzed

Finite-Difference Time-Domain Simulation of Light Propagation in 2D Scattering Media

The theoretical and numerical models for simulation of light propagation process through a turbid medium with randomly-positioned circular particles with a statistical variation in their diameters has been derived based on Finite-Difference Time-Domain (FDTD) method for direct solution of Maxwell’s equations. The results of numerical simulations for propagation of continuous-wave radiation and short laser pulses are compared with other scattering models for typical biological tissues

Propagation, Interaction, and Instabilities of Optical Vortices in Resonant Media

The features of propagation and interaction phenomena for singular light beams in resonant media have been analyzed theoretically and numerically. The influence of self-focusing and defocusing processes on the characteristics of optical vortices with di˙erent topological structure has been studied. The parameters for spatially localized structures in the form of dark vortex solitons have been characterized. The conditions for modulational instability of transverse structure of optical vortices have been determined and various scenarios of vortices break-up have been found numerically. The peculiarities of two- and three-vortices interaction have been discussed both for focusing and defocusing types of nonlinearity

Spatial-Temporal Dynamics of Light Beam Interactions in Nonlinear Interferometer

The work presents a theory of the optical beam interactions in interferometers with a non-linear resonant medium. The formation patterns for the light beam spatial structures in the conditions when the optical bistability mode is realized and symmetry breaking bifurcations are exhibited have been studied. The revealed features of a diffraction mechanism in the case of transverse interaction on two- and four-wave mixing have been analyzed