A Diode-Stack End-Pumped Electro-Optically Q-Switched Nd:YAG Slab Oscillator--Amplifier System

A laser diode-stack end-pumped electro-optically Q-switched Nd:YAG slab oscillator-amplifier system with near-diffraction-limited output is demonstrated by a stable-unstable hybrid resonator. The average power of 100W at a repetition rate of 10kHz with a pulse width 14.7ns and average
power of 76.3W at a repetition rate of 5kHz with a pulse width of 10.2ns are measured. At the repetition rate of 10kHz and at an output power of 89W, the beam quality factors M² in the unstable and stable directions are 1.3 and 1.5, respectively.