In China, both in the academic research and industrialization of customizable large size optical prism, it has an important influence in the world. Especially in the research of visible and ultraviolet nonlinear crystals, it has been at the leading level and has attracted worldwide attention. China's main achievements in the field of nonlinear crystals are (1) the invention of magnesium-doped LiNbO3 crystals, which has increased the damage threshold of LiNbO3 by more than two orders of magnitude by doping, which has greatly expanded the application field of lithium niobate crystals; In the borate series, a series of excellent UV nonlinear optical crystals such as BBO, LBO, CBO, and KBBF have been discovered and developed, which has created a new era of ultraviolet laser frequency doubling, which has enabled humans to continuously push the limit of solid ultraviolet laser. (3) For the first time, the practical application of KTP large single crystals by solvent method has been carried out internationally, and industrialization has been realized, which has made KTP crystals widely used throughout the world and promoted the development of laser technology. (4) It has led the research and experimental verification of periodic and quasi-periodic polarization artificial microstructure procurement high efficiency UV and IR grade optical mirrors, and opened up a new field of nonlinear optical crystals.
The growth technology of various nonlinear optical crystals in China is at the international advanced level. All existing plano/spherical/aspherical/cylindrical/paraboloid/off-axis optical mirrors growth methods in foreign countries are available in China. Almost all important nonlinear optical crystals have been grown, and some important crystals have met the major domestic engineering needs. A group of high-tech crystals have become commodities and enjoy high reputation in the world.
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