Temperature effect of Yb3+:YAG slab laser and diamond window cooling design

The temperature-related laser performances of the Yb3+:YAG slab laser have been investigated based on quasi-three level rate equation model, which include the energy storage and extraction efficiency. The results show that the extractable energy storage efficiency decreases significantly from 43% to 26% with the increase of the temperature in the lasing slab from 300 to 400 K. We also have demonstrated the feasibility of double-face cooling of lasing slab with a diamond window whose thermal conductivity is so high that a very thin plate suffices to efficiently remove the heat generated in the lasing slab. Simulation results show that with a pump intensity of 15 kW/cm2 and repetition rate of 10 Hz, to keep the maximum temperature of the lasing slab below a reasonable value, e.g., less than