DPSK色散管理线性和类孤子系统传输的简约解

采用简化法分别研究了差分相移键控（DPSK）色散管理线性和类孤子系统的传输特性,得出较为简洁明了的脉宽以及脉冲啁啾随距离演化的方程组.研究的结果发现,线性的DPSK系统只有在色散完全补偿的情形下是一种临界的稳定,而类孤子的DPSK系统即使在欠补偿情形下,系统也是完全的稳定,啁啾的演化是独特的闭合曲线.其完全稳定性的物理实质来自于非线性效应引入的自束缚势.从而说明DPSK色散管理类孤子系统良好的传输性能.

The Simplifying of System Transmission in DPSK Dispersion Managed Linear and Soliton-like Systems

The transmission characteristics of Differential Phase-Shift Keying (DPSK) Dispersion Managed Soliton-like (DMS) and linear systems are analyzed by simplifying.The concise evolution equations of pulse width and chirp with distance are gotten.The results had discleared that the linear DPSK system is critical steady only in condition of dispersion completely compensated,but the soliton-like DPSK system can completely steady even in lack of dispersion compensated,in which the chirp evolution is a unique close curve.The completed stability of soliton-like DPSK system has the physical essential that come from the self-trapping potential energy induced by nonlinear effects.It can be explained that the DMS of DPSK system have a favorable transmission performance.