Numerical investigation on output characteristics of diode-pumped Yb:YAG mode-locked laser with saturable absorber
Based on Haus master equation, the expression of small signal gain and of critical pump power, a numerical simulation is derived for the relations of critical pump power and output parameters to the ratio of radius of pump and oscillation beam, the length and concentration of laser crystal. The result shows that when the length of 1mm and concentration of 5at.% of the crystal is used, 1,030nm laser of average output power of 10.5W and pulse duration of 8.6ps is obtained under the pump power of 35W and the ratio of 1. Further, the critical pump power become lower, and the pulse become more powerful and narrower, while the ratio get closer to 1, crystal get longer and concentration get higher.
lasers small signal gain output power pulse duration