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掺钕离子的钒酸钇晶体（Nd：YVO4）是适合于激光二极管（LD）泵浦较为理想的固体增益介质之一．但Nd3+离子半径大（0．1109nm），Y3+离子半径小（0．1019nm），在生长过程中用Nd3+取代Y3+离子时，将引起YVO4正方晶格畸变趋向，导致晶体中出现结构应力，出现小角晶界缺陷，从而?
Nd: YVO4 doped neodymium ion is one of the ideal solid gain media for laser diode (LD) pumping. However, Nd3 + has a large radius (0.1109nm) and a small Y3 + ion (0.1019nm). When Nd3 + is substituted for Y3 + in the growth process, the distortion of the square lattice of YVO4 will be induced, resulting in the structural stress in the crystal with a small angle Grain boundary defects, thus?