Chinese Journal of Quantum Electronics ›› 2022, Vol. 39 ›› Issue (5): 687-706.doi: 10.3969/j.issn.1007-5461.2022.05.002

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Research progress of dislocation of YAG crystal

ZHANG Rui 1 , MEI Dajiang 1,3∗ , SHI Xiaotu 2,4,5 , MA Rongguo 2,4,5 , ZHANG Qingli 2,4,5∗ , DOU Renqin 2,4 , LIU Wenpeng 2,4   

  1. ( 1 College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China; 2 Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 3 State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China; 4 Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China; 5 University of Science and Technology of China, Hefei 230026, China )
  • Received:2021-12-04 Revised:2022-06-16 Published:2022-09-28 Online:2022-09-28

Abstract: There exists various defects during the growth of large-size YAG crystals, and dislocation is one of the main defects. Dislocation can cause stress birefringence, decrease the optical uniformity, increase optical losses, shorten the work life of the crystal and so on, therefore, it is very important to grow YAG crystal without dislocation or with low dislocation for the development of high-efficiency solid-state laser. This paper summarizes the research progress of dislocation in YAG crystal at home and abroad in the recent 40 years, including the research on dislocation in YAG crystal by chemical etching method, the decoration method, synchrotron radiation method, stress birefringence method, X-ray micro tomography and light scattering tomography, as well as the application examples of TEM and SEM, and also introduces the effect of crystal growth process on dislocation density and distribution in crystal. It provides a reference for the dislocation research and the growth of large-size and high-quality YAG laser crystals.

Key words: laser techniques, YAG crystal, dislocation, crystal defect, crystal growth

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