Non-linear optical crystal selenium borate

Abstract

The invention is a nonlinear optical crystal Se2B2O7, belonging to nonlinear optical material and its synthesis. And its chemical formula: molecular weight of Se2B2O7, 291.54, belonging to orthogonal crystal system, space group, P212121, and unit cell parameters: a= 7.4815(6),b=7.8984(5),c=9.0478(7), alpha=90degree, beta=90degree, gamma=90degree, V=534.65(7)3, and Z=4. And it is prepared by high temperature solid phase process. And it has excellent nonlinear optical performance, and SHG coefficient of its powder is 2.2 times greater than that of KDP and equivalent to that of LBO.

Description

technical field [0001] The invention belongs to nonlinear optical material and its synthesis. Background technique [0002] Nonlinear optical crystals, with frequency doubling effect (SHG), have important application value in high-tech fields such as laser frequency conversion, electro-optical modulation, and photorefractive information processing. Nonlinear optical materials are used in modern science and technology, especially in several military and civilian high-tech fields, such as submarine deep-water communication, laser blinding weapons, marine fish detection, CD recording, color laser printing, laser projection TV, optical computing and Optical fiber communication, etc., have a series of important applications. The nonlinear optical crystals currently used in practice include LiB 3 o 5 (LBO), β-BaB 2 o 4 (BBO), KH 2 PO 4 (KDP), KTiOPO 4 (KTP), LiNbO 3 (LNO) and BaTiO 3 (BTO) and so on. Recent studies have shown that the combination of Se(IV) and Te(IV) co...