Increasing pumping efficiency by using gradient-doped laser crystals

Abstract

Investigations of a new class of optical materials with functional nonuniform distribution of optical dopant are continued. Longitudinal pumping and heat release in active elements with a gradient distribution of optical centers are simulated. It is shown that, for a given length of the laser element, pumping efficiency remains at a stably high level upon variation of its power density for different gradients of concentration of activators. It is demonstrated that, in addition to a high level of optical pumping efficiency, the temperature profile in the active medium becomes smoother.