Effect of loss on transverse localization of light in 1D optical waveguide array in the presence of Kerr-type nonlinearity

作     者：Nezhad, M. Khazaei Mirshamsi, D. Zarif, F. Asadollah Rezaeiun, H. Rastegar Moghaddam 

作者机构：Ferdowsi Univ Mashhad Dept Phys Fac Sci Mashhad Razavi Khorasan Iran 

出 版 物：《OPTICAL AND QUANTUM ELECTRONICS》 (光电子学与量子电子学)

年 卷 期：2020年第52卷第1期

页      面：4-4页

核心收录：

学科分类：0808[工学-电气工程] 070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：Diagonal and off-diagonal disorder Radiation loss Kerr-type nonlinearity Edge and middle modes Waveguide array 

摘      要：In this paper we have comprehensive study on the interplay among radiation loss, transverse disorder (diagonal and off-diagonal) and Kerr-type nonlinearity on the light propagation in 1D array of optical waveguides. Our numerical results demonstrate the presence of three distinguished regimes of transverse light expansion at different propagation distances. At short propagation distance, the Kerr-type nonlinearity are dominated and results in the transverse localization of light through the self-trapping mechanism. Radiation loss, causes the light escape from the injected guides, affect the light expansion in middle distance via broadening the light beam width. At longer distance the disorder terms led to the transverse localization of light, again. Also, we compared the propagation of light in edge and middle modes in the presence of the above effects. Our results show that the propagation distance of first localized regime for edge modes is larger than the middle modes since the edge modes can exchange energy with one of the left or right waveguides, while for middle modes there are two ways for energy exchange. Therefore the discrete diffraction can be diminished the nonlinear effects in middle modes faster than the edge modes.