Ultra-flat dispersion in an integrated waveguide with five and six zero-dispersion wavelengths for mid-infrared photonics  

作　　者：Yuhao Guo Zeinab Jafari Lijuan Xu Changjing Bao Peicheng Liao Guifang Li Anuradha M.Agarwal Lionel C.Kimerling Jurgen Michel Alan E.Willner Lin Zhang 

机构地区：[1]Key Laboratory of Opto-electronic Information Technical Science of Ministry of Education and Key Laboratory of Integrated Opto-electronic Technologies and Devices in Tianjin,School of Precision Instruments and Opto-electronics Engineering,Tianjin University,Tianjin 300072,China [2]School of Computer and Electrical Engineering,Shiraz University,Shiraz,Fars,Iran [3]School of Electronic Engineering,Tianjin University of Technology and Education,Tianjin 300222,China [4]Department of Electrical Engineering,University of Southern California,Los Angeles,California 90089,USA [5]College of Optics and Photonics,CREOL and FPCE,University of Central Florida,Orlando,Florida 32816,USA [6]Department of Materials Science and Engineering,Massachusetts Institute of Technology,Cambridge,Massachusetts 02139,USA

出　　处：《Photonics Research》2019年第11期1279-1286,共8页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61775164,61225005,61775165)

摘　　要：We propose a new type of dispersion flattening technology, which can generate an ultra-flat group velocity dispersion profile with five and six zero-dispersion wavelengths(ZDWs). The dispersion value varies from-0.15 to 0.35 ps/(nm·km) from 4 to 8 μm, which to the best of our knowledge is the flattest one reported so far, and the dispersion flatness is improved by more than an order of magnitude. We explain the principle of producing six ZDWs. Mode distribution in this waveguide is made stable over a wide bandwidth. General guidelines to systematically control the dispersion value, sign, and slope are provided, and one can achieve the desired dispersion by properly adjusting the structural parameters. Fabrication tolerance of this waveguide is also examined.We propose a new type of dispersion flattening technology, which can generate an ultra-flat group velocity dispersion profile with five and six zero-dispersion wavelengths(ZDWs). The dispersion value varies from-0.15 to 0.35 ps/(nm·km) from 4 to 8 μm, which to the best of our knowledge is the flattest one reported so far, and the dispersion flatness is improved by more than an order of magnitude. We explain the principle of producing six ZDWs. Mode distribution in this waveguide is made stable over a wide bandwidth. General guidelines to systematically control the dispersion value, sign, and slope are provided, and one can achieve the desired dispersion by properly adjusting the structural parameters. Fabrication tolerance of this waveguide is also examined.

关 键 词：WAVEGUIDE dispersion FLAT 

分 类 号：TN2[电子电信—物理电子学]