Numerically efficient coherent mode representations for partially coherent beams with separable phases

We present a method to numerically compute the coherent mode representations (CMRs) for partially coherent beams with separable phases. This special class of random light field has the ability to self-focus and is resistant to turbulence-induced degradation, making it potentially useful in applications such as optical communications. We validate our method by generating (in simulation) two such sources from the literature using their computed CMRs. Lastly, we conclude with a summary of our approach and a discussion of potential applications

Design and implementation of flexible laboratory system for beam propagation study through weak atmospheric turbulence

Different applications such as astronomy, remote optical sensing and free space optical communications, among others, require both numerical and laboratory experimental simulations of beam propagation through turbulent atmosphere prior to an outdoor test. While rotating phase plates or hot chambers can be applied to such studies, they do not allow changing the atmospheric conditions and the propagation distance in situ. In contrast, the spatial light modulators (SLMs) are a flexible alternative for experimental turbulence simulation. In this work we consider an experimental setup comprising two SLMs for studying laser beam propagation in weak atmospheric turbulence. The changes of atmospheric conditions and propagation distances are properly achieved by the adjustment of the phase screens and the focal distances of digital lenses implemented in both SLMs. The proposed system can be completely automatized and all its elements are in fixed positions avoiding mechanical misalignment. Its design, propagation distance and atmospheric condition adjustment are provided. The setup performance is verified by numerical simulation of Gaussian beam propagation in the weak turbulence regime. The obtained parameters: scintillation index, beam wander and spreading are compared to their theoretical counterparts for different propagation distances and atmospheric conditions

Formación de haces electromagnéticos con propiedades deseables por medio del modulador espacial de luz de cristal líquido.

"En esta tesis se estudia la aplicación del modulador espacial de luz de cristal líquido (MEL-CL) en la formación de haces electromagnéticos con propiedades deseadas, particularmente en las áreas de modulación de coherencia y polarización y la formación de vórtices ópticos. Como resultado, son propuestas dos técnicas experimentales originales cuya efectividad se demuestra por medio del MEL-CL modelo LC2002 Holoeye.

Formación de haces electromagnéticos con propiedades deseables por medio del modulador espacial de luz de cristal líquido.

"En esta tesis se estudia la aplicación del modulador espacial de luz de cristal líquido (MEL-CL) en la formación de haces electromagnéticos con propiedades deseadas, particularmente en las áreas de modulación de coherencia y polarización y la formación de vórtices ópticos. Como resultado, son propuestas dos técnicas experimentales originales cuya efectividad se demuestra por medio del MEL-CL modelo LC2002 Holoeye.