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首页> 外文期刊>Journal of Crystal Growth >Growth of large size high optical quality KTP-type crystals
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Growth of large size high optical quality KTP-type crystals

机译：大尺寸高光学品质KTP型晶体的生长

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摘要

Growth of large and optically uniform single crystals of KTiOPO_4 (KTP) and its isomorphs is of great importance in laser frequency conversion applications. We have demonstrated that the size of the crystal must not be sacrificed in the quest for attaining high quality. The top-seeded solution growth from pure and modified self-fluxes with pulling on oriented seeds is found to be technologically preferable method for achieving this goal. The crystal properties are largely dependent on the solution chemical composition, and the latter must be properly selected with regard to the required crystal optical performance. Otherwise, the key to obtaining crystal with superior properties is the choice of seeding direction with respect to application. Thus pulling in the [100]-direction from K_6P_4O_(13-) or Rb_6P_4O_(13-) type solutions yield crystals with excellent optical uniformity within the [100] facet constituting the major part of the growth interface. Optical elements fabricated from such crystals (especially from RbTiOPO_4) are most suitable for electro-optic Q-switching. Pulling of KTP crystals on [010] and [001]-oriented seeds, from self-fluxes of various compositions, is also discussed in terms of associated application, such as high-power frequency doubling of 1064 nm laser radiation into the green and preparation of periodically poled substrates for quasi-phase-matched blue laser operation.
机译：KTiOPO_4（KTP）及其同晶型的大且光学均匀的单晶的生长在激光频率转换应用中非常重要。我们已经证明，在追求高品质的过程中绝不能牺牲晶体的尺寸。从纯种和修饰的自助熔剂中生长出种子的种子溶液，再加上定向种子，是实现该目标的技术上较好的方法。晶体性质在很大程度上取决于溶液的化学组成，并且必须根据所需的晶体光学性能适当选择溶液的化学组成。否则，获得具有优异性能的晶体的关键是根据应用选择晶种方向。因此，从K_6P_4O_（13-）或Rb_6P_4O_（13-）型溶液沿[100]方向拉出，在构成生长界面主要部分的[100]小平面内产生具有优异光学均匀性的晶体。由这种晶体制成的光学元件（尤其是由RbTiOPO_4制成）最适合电光Q开关。还从相关应用的角度讨论了从[010]和[001]定向晶种上将KTP晶体从各种成分的自助熔剂中拉出的问题，例如将1064 nm激光辐射的高倍频成绿色并制备而成。周期极化的基板用于准相位匹配的蓝色激光操作。

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