EDFA对基孤子脉冲进行压缩与放大的数值研究

Numerical studies on the compression and amplification of the fundamental soliton pulse using erbium-doped fiber amplifier

从描述光脉冲在掺铒光纤放大器(EDFA)中传输的非线性薛定谔方程出发,对基孤子脉冲在EDFA中的压缩与放大进行了数值研究,并对孤子脉冲在其中的压缩提出优化方案。结果表明,通过合理地选择EDFA的参数,可使无啁啾的基孤子脉冲实现绝热压缩和放大;对具有初始啁啾的基孤子脉冲,压缩过程将不再满足绝热条件;对于正啁啾的基孤子脉冲,可得到较好的压缩与放大;而对于负啁啾的基孤子脉冲,压缩效果却较差。

Starting from the nonlinear Schroelinger equation describing the pulse propagation in erbium-doped fiber amplifier （EDFA）, the compression and amplification of fundamental soliton pulse using EDFA are investigated numerically, and the optimum schemes for soliton pulse compression are proposed. The results show that：for the fundamental soliton pulse without the chirp, the pulse can be compressed and amplified adiabatically by selecting appropriate parameters of erbium-doped fibers;for the chirped fundamental soliton pulse, the process of the compression and amplification is not satisfied adiabatical condition; the effective compression and amplification can be obtained for the positive chirped fundamental soliton pulse, but the compression effect for the negative chirped fundamental soliton pulse is poor.