量子孤子在光纤中的传播特性

Propagation of Quantum Soliton in Optical Fiber

利用线性近似和分步傅里叶变换法,分析了量子孤子在无耗光纤中的传播规律量子孤子在光纤中的行为由量子非线性薛定谔方程(QNSE)描述,用线性近似法求解此方程,将量子噪声与经典部分分离,着重讨论了孤子量子噪声的演化行为,分析了高阶色散对噪声压缩的影响结果表明在较短的传输距离内,孤子的压缩性依然存在,但无论初始时压缩参数如何,随着传输距离的增加,压缩比会达到一个极限;在负色散区。

The propagation of quantum soliton in lossless optical fiber is numerically simulated by the use of the linearization approximation and split step Furior. The evolution of quantum noise of solitons is obtained by solving quantum nonlinear Schrodinger equation. The squeezing ratio is calculated. The results show that squeezing still survives but will reach a limit as the propagation distance increases.