Large-size X-plane KTP crystal and growth method thereof

The invention relates to the technical field of non-linear crystal materials, and in particular, relates to a large-size X-plane KTP crystal and a growth method thereof. The large-size X-plane KTP crystal is prepared through the following growth method that an X plane serves as a seed crystal growth plane, a seed crystal is immersed in molten liquid to be sown and grow, and the seed crystal is notpulled in the crystal growth process; the X face, the Y face and the Z face of the seed crystal are perpendicular to one another, and the two edges, intersecting with the Z face, of the X face immersed in the molten liquid are chamfered edges. According to the method, the seed crystal shape and the flux immersion direction are creatively selected, so that the growth speed difference of the KTP crystal in the X-axis direction, the Y-axis direction and the Z-axis direction is reduced, and the KTP crystal with good optical uniformity, large size and higher utilization rate is finally obtained. 本发明涉及非线性晶体材料技术领域，具体涉及一种大尺寸