Chinese Journal of Quantum Electronics ›› 2021, Vol. 38 ›› Issue (2): 180-184.

• Special Issue on Advanced Optical Crystal • Previous Articles     Next Articles

Research progress of quasi-phase matching deep-ultraviolet nonlinear optical crystals

SHAN Pai1;2, WANG Zujian1;2, SU Rongbing1;2, HE Chao1;2, YANG Xiaoming1;2, LONG Xifa1;2   

  1. 1 Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China; 2 Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China
  • Received:2020-12-14 Revised:2021-01-27 Published:2021-03-28 Online:2021-03-29

Abstract: Deep-ultraviolet (DUV) nonlinear optical (NLO) crystal is a key material for the solid-state lasers to generate DUV coherent lights. Due to the limit of band gap, NLO coefficient and birefringence, the existing NLO crystals are difficult to generate DUV coherent lights by phase matching, except KBe2BO3F2 crystal. It’s a new idea to solve the phase matching problem of DUV NLO crystals based on the quasi-phase matching principle. A detailed description of properties of BaMgF4 crystal, Mg3B7O13Cl crystal and LaBGeO5 crystal, and their applications on the generation of DUV coherent lights based on the quasi-phase matching principle are introduced. Finally, the suggestion and prospect on DUV quasi-phase matching crystals are presented.

Key words: nonlinear optics, ferroelectricity, quasi-phase-matching, deep-ultraviolet

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