曲折平板激光器的界面与材料工程

Liu Fei, Dong Siyu, Zhang Jinlong, Jiao Hongfei, Ma Bin, Wang Zhanshan, Cheng Xinbin

MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai, 200092, China.

Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China.

Sci Rep. 2017 Dec 1;7(1):16699. doi: 10.1038/s41598-017-16968-0.

Laser damage of zigzag slab lasers occurs at interface between laser crystal and SiO film. Although an additional HfO layer could be used to manipulate electric-field on the crystal-film interface, their high absorption and polycrystalline structure were unacceptable. SiO was then doped in HfO to suppress its crystallization and to achieve low absorption by annealing. HfSiO nanocomposite layers were then inserted between laser crystal and SiO film to minimize electric-field at crystal-film interface. Laser damage resistance of this new architecture is two times higher than that of traditional zigzag slab lasers.

曲折平板激光器的激光损伤发生在激光晶体与SiO薄膜的界面处。尽管可以使用额外的HfO层来控制晶体 - 薄膜界面上的电场，但其高吸收率和多晶结构是不可接受的。然后在HfO中掺杂SiO以抑制其结晶并通过退火实现低吸收率。接着在激光晶体和SiO薄膜之间插入HfSiO纳米复合层，以最小化晶体 - 薄膜界面处的电场。这种新结构的抗激光损伤能力比传统曲折平板激光器高出两倍。