Compact efficient 1.5Â W continuous wave Nd:YVO4/LBO blue laser at 457Â nm

A compact folded three-mirror cavity with length of 100 mm is optimized to obtain high efficient 457 nm laser. When the incident pump power into Nd:YVO4 is 16.3 W, as high as 1.52 W continuous wave 457 nm blue laser is achieved by LBO intracavity frequency doubled. The optical-to-optical conversion efficiency is greater than 9.3%.