YANG Jian-fang,WANG Chun-can.Numerical simulation of asymmetric dual-core fiber with large group-velocity dispersion[J].Optoelectronics Letters,2021,17(2):96-101 Numerical simulation of asymmetric dual-core fiber with large group-velocity dispersion Author Name Affiliation YANG Jian-fang  Key Laboratory of All Optical Network and Advanced Telecommunication Network, Ministry of Education, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China  WANG Chun-can  Key Laboratory of All Optical Network and Advanced Telecommunication Network, Ministry of Education, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China  Abstract:       The asymmetric dual-core fiber (ADCF) is proposed to obtain large group velocity dispersion (GVD) because of the coupling effects between the fundamental modes of the central core and high-order modes of the side core. The supermodes of the ADCF can provide anomalous- and normal-GVD profiles with large peak values at the maximum dispersion wavelengths. The maximum dispersion wavelengths can be shifted in the wavelength window of 1 550 nm by properly tuning the refractive indexes and diameters of the cores or spacing between the two cores. Furthermore, the numerical results show that the ADCF with the normal-GVD supermode 1 can be employed in the pulse broadening, where the broadening factor can reach more than 30 without pulse distortion from nonlinear effects. Hits: 850 Download times: 17 View Full Text    Download reader