20-kHz watt-level green laser with LGS crystal electro-optic Q-s...

A diode-end-pumped electro-optic (EO) Q-switched green laser operating at the repetition rate of 20 kHz is reported. A block of La<sub>3</sub>Ga<sub>5</sub>SiO<sub>14</sub> (LGS) single crystal is used as a Q-switch and the type I phase-matching LiB<sub>3</sub>O<sub>5</sub> (LBO) is used as the nonlinear crystal in the second harmonic generation. The 2.3-Waverage power of 532-nm green laser is obtained at the repetition rate of 20 kHz w