Abstract: The electro-optical(E-O)properties of KTP crystal were mentioned briefly and compared with that of KD*P and LN crystals in this paper.Main progress in E-O applications for KTP crystals was summarized.Merits and demerits in E-O applications for KTP crystals grown by the hydrothermal technique and by the flux method respectively were analyzed.Finally,the situation on E-O applications for KTP crystal with low conductivity grown by flux method was presented.

Key words: The electro-optical(E-O)properties of KTP crystal were mentioned briefly and compared with that of KD*P and LN crystals in this paper.Main progress in E-O applications for KTP crystals was summarized.Merits and demerits in E-O applications for KTP crystals grown by the hydrothermal technique and by the flux method respectively were analyzed.Finally,the situation on E-O applications for KTP crystal with low conductivity grown by flux method was presented.