The nonlinear optical (NLO) crystals are used in frequency conversion for lasers. Dream Lasers has a complete line of NLO crystals including BBO, KTP KNbO_{3, KDP & DKDP and LiNbO3} crystals. New NLO crystals such as CLBO and CBO crystals are under R&D stage in Dream Lasers. Please refer to Technology Chapter for more information about nonlinear crystals.