This paper,for the
first time in China,demonstrates frequency quadrupling in an LD pumped solid state laser
using potassium titanyl phosphate (KTP) and beta barium borate (β BBO) With common
planar planar cavity,the slope efficiency of one end pumping lasing of Nd∶YVO 4 is as high
as 55 68% An intra cavity frequency doubled green laser with Ⅱ type phase matched of KTP
has been experimentally demonstrated The highest green laser output ...