基于ED-NALM的全光波长变换理论模型

Theoretical model of all optical wavelength conversion based on ED-NALM

提出了应用非线性掺饵光纤放大环镜进行全光波长变换的理论模型。详细研究了反转光脉冲的峰值功率、脉冲宽度和消光比等重要物理参量以及反转光脉冲继续在常规单模光纤中传输时的演变特性。结果表明:应用此模型,反转光脉冲除具有较高的峰值功率和消光比外,脉冲的宽度也比初始信号脉冲的宽度窄,而且脉冲的中心部分带有一定量的线性上啁啾,当其在常规单模光纤中传输时,在光纤的初始阶段,脉冲的峰值功率将经历先增加后减小的变化过程,而脉冲宽度的变化趋势与其正好相反。

The theoretical model of all optical wavelength conversion based on an erbium-doped nonlinear amplifying fiber loop mirror is proposed. We focus on the peak power, pulse width, extinction ratio of conversion optical pulse and the transmission property of conversion optical pulse in standard single mode fiber. The results show that the conversion optical pulse has higher peak power and extinction ratio and shorter pulse width by using the model, and positive chirp is linear in the middle part of the conversion pulse. When the conversion optical pulse is transmitting in standard single mode fiber, the peak power will first increase then decrease, and the variation of pulse width is opposite as peak power.