Controlling the emission modes of Solid State Laser end pumped by diode laser

Abstract

A theoretical and experimental study in attempt to develop a new method for controlling the generation of laser modes has been carried out (Laguerre-Gaussian (LG). In order to generate a particular mode, the gain of that mode must be controlled compared to competing modes by two ways. The two methods are based on changing the effective mode volume of the desired mode in order to obtain the optimum threshold power of the mode to be generated either in the first method by changing the location and depth of pumping within the laser rod or in the second method by splitting the pumping beam into several bundles that correspond to the vacuum position of the pattern to be demonstrated using a multi-pattern beam splitter, So in the end pumped in both cases.