Temperature and Input Energy Dependence of the 946-nm Stimulated Emission Cross Section of Nd^(3+):YAG Pumped by a Flashlamp

The thermal effect on the laser transition at 946nm is investigated.The temperature of the cooling system is verified in the range 2-60℃.A Nd:YAG laser crystal is utilized as a gain medium and is pumped by a newly developed flashlamp.The variable pumping energy is accomplished within the 5-40 d range.The stimulated emission cross section of the 946-nm line is estimated based on the fluorescence spectrum of the Nd:YAG laser.The stimulated emission cross section of the 946-nm line is found to be inversely proportional to the temperature and to the input energy due to the increase of the thermal population at the ground level.