Switching Dynamic Analysis for Twin-Core Fibre Coupler Using Supermode Theory  

作　　者：罗爱平 徐文成 陈伟成 崔虎 

机构地区：[1]Laboratory of Photonic Information Technology and Institute of Quantum Electronics, South China Normal University, Guangzhou 510631

出　　处：《Chinese Physics Letters》2006年第2期381-384,共4页中国物理快报（英文版）

基　　金：Supported by the Natural Science Foundation of Guangdong Province （04010397）, and the Excellent Teacher Foundation of Guangdong Province （Q02084）.

摘　　要：Characteristics of optical switching in a twin-core fibre coupler are numerically analysed under short pulse input by using supermode theory. The dynamic nonlinear coupled superlnode equations are derived, The numerical results show that the input pulse width determines the power transfer and the pulse temporal profile in the output ports. The optimal switching characteristics can be obtained by selecting an appropriate initial pulse width. In addition, the switching characteristic curves are insensitive to the input pulse shape for either fundamental soliton pulse or Gaussian pulse input, but sensitive to pulse sharpness. A reduced switching power and a sharper switching transition can be obtained by using the sharp super-Gaussian pulse.Characteristics of optical switching in a twin-core fibre coupler are numerically analysed under short pulse input by using supermode theory. The dynamic nonlinear coupled superlnode equations are derived, The numerical results show that the input pulse width determines the power transfer and the pulse temporal profile in the output ports. The optimal switching characteristics can be obtained by selecting an appropriate initial pulse width. In addition, the switching characteristic curves are insensitive to the input pulse shape for either fundamental soliton pulse or Gaussian pulse input, but sensitive to pulse sharpness. A reduced switching power and a sharper switching transition can be obtained by using the sharp super-Gaussian pulse.

关 键 词：NONLINEAR DIRECTIONAL COUPLER INTERMODAL DISPERSION PROPAGATION 

分 类 号：O43[机械工程—光学工程] TN25[理学—光学]