Optimization of the gain medium distribution in a diode-side-pumped bonded laser amplifier

In the context of new research to develop a laser driver for Inertial Fusion Energy, efforts are underway to overcome thermal limitations and increase the repetition rate of high-power laser facilities. Thus, with the same standard of laser performance, the development of high-thermal conductivity solid-state laser media at 1053 nm has become crucial. Bonding an optically inactive heatsink crystal to the gain medium has proven to be efficient to reduce the heat generated during pumping. Our past work highlighted material and geometrical considerations for thermal effects reduction in a diode-side-pumped bonded laser rod composed of a single gain layer. We have developed a numerical model to perform a parametric study discussed thereafter. Here, we suggest an optimization by examining the thickness and the number of gain layers within the bonded geometry. Both material combination and gain medium distribution of the samples are discussed using simulations and experiments.