Study on high average power diode laser used in pumping

The package structure and high efficiency cooling technique have been studied for high average power diode laser. The laser power of single CW DL bar reach 50 W, the life time reached 5 000 h, and the power of QCW DL bar reached 150 W at 10% duty cycle, 100 W at 25% duty cycle, the life time reached 5×109 pulse. The 25 bar stack DL arrays were made with module structure, it's laser power reached CW 1 kW and QCW 2.5 kW at 20% duty cycle. 