Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, Shanghai 201800, China.
Opt Lett. 2010 Jan 15;35(2):187-9. doi: 10.1364/OL.35.000187.
More than 97% flat-top diffraction efficiency in the -1st-order TE polarization over a 110 nm wavelength range around 800 nm in an all-dielectric grating is designed by a simulated annealing algorithm and the Fourier mode method. Its band is near to the maximum bandwidth provided by a dielectric high-reflectivity mirror under the match layer. This result will provide a way for high-efficiency chirped-pulse amplification to be used in an ultrashort high-power pulse laser system based on all-dielectric gratings. Furthermore, an effective method for broadband high-efficiency all-dielectric grating design is presented in this Letter.
通过模拟退火算法和傅里叶模态方法，设计了一种在 800nm 附近 110nm 波长范围内，TE 偏振的-1 阶平顶衍射效率超过 97%的全介质光栅。其带宽接近匹配层下介质高反射镜提供的最大带宽。这一结果将为基于全介质光栅的超短高功率脉冲激光系统中的高效率啁啾脉冲放大提供一种方法。此外，本文还提出了一种宽带高效率全介质光栅设计的有效方法。
