High-peak-power diode-pumped actively Q-switched Nd:YAG intracavity Raman laser with an undoped YVO_4 crystal

摘要

The efficient stimulated Raman scattering conversion in a diode-pumped actively Q-switched Nd:YAG laser was achieved with an undoped YVO_4 crystal as a Raman shifter. With an incident pump power of 16.2 W, 1176-nm first Stokes average output power of 2.97 W was generated at a pulse repetition rate of 50 kHz. The maximum pulse energy is higher than 83 μJ at both 20 kHz and 30 kHz. With mode-locked modulation, the effective pulse width far above threshold is usually below 5 ns. With an incident pump power of 7.62 W, the peak-power of 43.5 kW was demonstrated at 20 kHz.