Propagación de haces gaussianos a través de capas activas

V. VÁZQUEZ; J. C. FERNÁNDEZ; M. T. GAREA; C. L. MATTEO; L. I. PÉREZ; P. A. SORICHETTI

Porto

Congreso; 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 2013

Red Iberoamericana de Optica

The characteristics of propagation, reflection and transmission of space and time-limited beams are of great importance for the classical description of the electromagnetic field modes in lasers and other optoelectronic devices. Beams with Gaussian distribution of amplitudes are the most widely studied for a number of reasons. They correspond to the fundamental Gaussian mode in a cylindrical or rectangular optical resonator (cavity), and often are desirable at the output of an amplifier. The most widely used method for describing the behavior of Gaussian beams proposes a simplification to the Maxwell´s equations. However, this work deals with an alternative approach that describes the beam in terms of a continuous spectrum (in space or time) of plane waves, in order to study Gaussian beam transmission through active layers (Tamir´s generalized method). We consider that active media are far from saturation, i. e. the gain does not depend on the amplitude of the electric field. We study the transmission of electromagnetic pulses through thin active layers. We consider an active layer between two transparent isotropic media and a normally impinging 2D Gaussian beam, which could be both limited in time or space. The analytical results are compared to those obtained by numerical integration and circuit simulation.