| Autor: |
Huang HL; Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China.; School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China., Shi QK; Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China., Deng Y; Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China., Lei XY; Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China., Zhang QH; Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China., Chen JJ; School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China., Deng XR; Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China. |
| Abstrakt: |
In order to improve laser transmission efficiency at 1053 nm and 527 nm, a potassium deuterium phosphate (DKDP) crystal (a key component of high-power laser systems) needs a bi-layer antireflection coating system on its incident surface. UV-curable polysiloxane coatings with a refractive index varying from 1.500 to 1.485 were prepared through the polycondensation of a methacryloxy propyl trimethoxylsilane (MPS) monomer with a controllable degree of hydrolysis. Additionally, the influence rule of the coating structure on the refractive index was intensively studied, and the primary factors that dominate the hydrolysis process were discussed. Further refractive index adjustment was achieved using only a small amount of dopant based on the polysiloxane coating with refractive index of 1.485, allowing for high antireflection of the bi-layer coating system at desired wavelengths to be achieved. In addition, high laser damage resistance and remarkable mechanical properties of the coating were simultaneously realized through the incorporation of a minor quantity of dopants, which benefited from the successful modulation of the intrinsic refractive index of the polysiloxane coating. |
