A laser diode array pumped, Nd: YVO4/KTP, composite material microchip laser

Abstract Fifty milliwatts of green (532 nm) fundamental spatial mode light have been generated by a continuous wave, frequency doubled microchip laser, consisting of a 0.5 mm thick piece of Nd: YVO4 in intimate optical contact with a 2 mm thick piece of KTP, and pumped by a laser diode array immediately behind the microchip. The initially nominally plano/plano cavity produced a near diffraction limited fundamental output beam at all pump powers.