24-mJ, 2-kHz pulse generation with a Q-switched Nd:YAG laser oscillator and fiber amplifier hybrid system

In this paper, we study the pulse generation with the experimental apparatus consists of an in-house Q-switched Nd:YAG rod laser oscillator and a Yb-doped fiber amplifier. As a result, we obtained an average output power of 48 W with a typical clean Q-switched pulse waveform at a repetition rate of 2 kHz. This is, to our knowledge, the highest pulse energy obtained with a solid-state-laser oscillator and a fiber-based amplifier scheme.