Self-Diffraction of Two-Dimensional Light Beams With Different Intensity Distributions

Представлены теоретические результаты сравнения распространения в линейной изотропной среде в свободном режиме двумерных световых пучков: гауссовых, квадратных и круговых супергауссовых. Детально показана динамика изменения формы световых пучков при их распространении в линейной изотропной среде. Установлено, что существуют значения толщины среды, для которых характерна значительная деформация супергауссова пучка, в связи с чем наблюдается дополнительная самофокусировка супергауссовых пучков, для гауссовых пучков дополнительная самофокусировка не наблюдается. Показаны различия в распространении гауссовых и супергауссовых двумерных световых пучков, отмечены преимущества и недостатки использования квадратных и цилиндрических световых пучков с супергауссовым распределением интенсивности.= Presented theoretical results of the comparison of the propagation in a linear isotropic medium in a free regime of two-dimensional light beams: Gaussian, square and circular super-Gaussian beams. Shown in detail the dynamics of the change in the shape of light beams during their propagation in a linear isotropic medium. It is established that there exist values of the medium thickness for which a significant deformation of the super-Gaussian beam is characteristic, in connection with this additional self-focusing of super-Gaussian beams is observed, additional self-focusing is not observed for Gaussian beams. Shown differences in the propagation of Gaussian and super-Gaussian 2D light beams, and the advantages and disadvantages of using square and cylindrical light beams with a super-Gaussian intensity distribution are noted

Study of micro-illumination techniques with optical fibers and its application in diagnostic methods

The scope of the project is to characterize the illumination in our specific system, although possibilities extend to be able to measure any effect that light produces (optical, acoustic or electric effect) not only used to illuminate but also to excite (increasing the chances not only to diagnosis but also to the therapy, as previously mentioned). The working place provided for the development of the project was perfectly suitable in order to overcome the physical part of the analysis. Since the first objective for the development of the measuring system was not the analysis of biological tissues and emulsions but the analysis of metallic (opaque) surfaces, the laboratory was not prepared for biological studies and sample preparations. Due to the lack of time and the difficulties to maintain the samples in a good state, selected tissues and turbid media were simple, easy to handle, prepare and maintain. For this first phase of the study, characterization was done in a controlled media. As a next stage this would be applied to more complex tissues.Ingeniería Biomédic