Potassium titanyl phosphate ( ktiopo4 or ktp ) crystal is a superior nonlinear optical material . but its high conductivity along c direction limits its applications in electro - optical areas 磷酸钛氧钾( ktiopo4或ktp )晶体是一种性能优良的非线性光学晶体材料,但由于其c向电导率较高的缘故,限制了它在电光方面的应用。