“…Nd-lasers have important applications in many fields, such as medical, industry, communication, etc. Much Nd-doped crystals, such as Nd:YVO 4 , Nd:GdVO 4 , Nd:LuVO 4 , Nd:LuGdVO 4 , Nd:YAG, and so on, have been proved to be excellent laser materials suitable for direct laser-diode (LD) pumping [1][2][3][4][5][6][7]. Gadolinium gallium garnet (GGG), another crystal suitable for Nd doping and first grown by J.…”