Stable and efficient green light generation by intracavity frequency doubling of Nd:YVO4 lasers

Abstract
A green light source of 11 mW (maximum) has been obtained by frequency doubling in 3 at. % Nd:YVO4 lasers pumped by a single longitudinal mode laser diode (LD), for a 50 mW incident pumping power, with grating feedback optics. When the temperature of the LD was changed within the range of 23±10 °C, the oscillated wavelength of the LD remained unchanged, and the relative intensity noise of the green light was maintained to less than −140 dB/Hz (at 2.5 MHz).