Abstract
We report on two effective methods, multiparameter optimization and local optimization combined with the diffraction bandwidth merit function, to design a broadband pulse compression grating (PCG), and we present broadband, high-efficiency PCGs based on both the multilayer dielectric grating (MDG) and metal-multilayer dielectric grating (MMDG) models. For MDG, the average diffraction efficiency is higher than 97.5% for TE polarization light over the bandwidth centered at . Moreover, a novel multilayer structure, which comprises higher index material in the high- reflectivity mirror and relatively lower index material on top, is first proposed to yield higher average efficiency, broader bandwidth, and excellent fabrication tolerance. For MMDG, it exhibits an ultra broadband top-hat diffraction spectrum with average efficiency exceeding 97% over the wavelength wide centered at . In addition, the MMDG structure, which has the best tolerance for grating fabrication, is determined by investigating characteristics of MMDGs with different thin-film structures.
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
Lingyun Xie, Jinlong Zhang, Zhanyi Zhang, Bin Ma, Tongbao Li, Zhanshan Wang, and Xinbin Cheng
Opt. Express 29(2) 2669-2678 (2021)
Kai He, Jianpeng Wang, Yongqiang Hou, Xu Li, Heyuan Guan, Fanyu Kong, Shijie Liu, Yunxia Jin, and Kui Yi
Appl. Opt. 52(4) 653-658 (2013)
Fanyu Kong, Yunxia Jin, Heyuan Guan, Shijie Liu, Jianbo Wu, Ying Du, and Hongbo He
Appl. Opt. 53(22) 4859-4864 (2014)