Study on High power Laser Diode Pumped Nd:YAG Laser and Its Frequency Conversion

A high power intracavity frequency doubled Nd:YAG laser with KTP crystal and A-O Q-switcher pumped by 1600 Watt-808 nm laser diodes and its thermal effect are discussed. Also we proved that the title angle of KTP crystal can be to compensate for the phase mismatching and to solve the problem of the drop of green laser output power along with the increasing temperature of KTP crystal. Then based on optical parametric oscillator (KTP-OPO) pumped by 532 nm laser and their frequency doubling (with KTP and BBO) a Watt-level red and blue laser system which would be provided as RGB laser projection display are described. 1. High power green laser High power laser diode pumped green laser source (including CW and high repetition rate operation) has many applications. As a new light source it will be used for the replacing ofthe traditional lamp-pumped solid state lasers and the Copper-Vapor laser, because it is an important pump source of laser isolation of the Uranium isotopes for saving electrical energy, diode- pumped high power green laser was considered as the most excellent solution. On the other hand, it will be used in some fields such as ocean exploration, laser probe, and under-sea communication etc. Laser diode pumped intracavity frequency doubled Nd: YAG laser is one of the best way to obtain a high power green laser source (532 nm). Recent years, some literature on high power green laser even over 100 Watts191