1.2 kW, 20 kHz Nanosecond Nd:YAG Slab Laser System

• DOI: 10.3390/photonics11040297
• Publication Date: 2024-03-25T16:40:11Z
• Authors: Hao Liu; Jisi Qiu; Yanzhong Chen; Haocheng Wang; Tianqi Wang; Yueliang Liu; Xiaoquan Song; Zhongwei Fan
• Keywords: Nanosecond; Slab

In this paper, we develop a kW-level high-repetition-rate nanosecond master oscillator power amplifier (MOPA) laser system, employing structure of fiber, Nd:YVO4, and Nd:YAG hybrid amplification. A tunable fiber seed source is used for adjustable pulse repetition frequency width. The Nd:YVO4 pre-amplifier, which dual-end-pumped, achieves high gain while maintaining good beam quality, the high-power side-pumped slab main-amplifier enables efficient rate output can be adjusted within range 1~20 kHz, width tuned 10~300 ns. 6 mW at 20 kHz; achieve an average 1240 W with total extraction efficiency 39.1% single-pulse energy 62 mJ 301 This parameter-controllable holds promise applications in cleaning complex surface contaminants.