基于LOA的XGM全光波长转换消光比特性的研究

建立了线性光放大器(LOA)的交叉增益调制(XGM)波长转换理论模型.着重讨论了抽运光与探测光的波长和功率、LOA中分布式布拉格反射镜(DBR)的反射率和注入电流等参量对输出消光比特性的影响.结果表明,输出消光比随着抽运光(探测光)波长的增加而增加(减小);适当的减小探测光功率和选择合适的注入电流可以获得较大的消光比;波长向下转换时的消光比明显优于向上转换时的消光比;同样,提高LOA中DBR的反射率,也可以获得较高的消光比.

Study of extinction ratio characteristics of wavelength conversion using XGM based on LOA

A theoretical model of wavelength conversion based on cross-gain modulation in a linear optical amplifier (LOA) is established. The influences of LOA pump and probe light, DBR's reflectivity and current parameters on extinction ratio characteristics of converted signals are discussed. The results show that the output extinction ratio gets larger as the increase of pump wavelength but becomes smaller as the increase of probe wavelength; lower probe power and proper input current have the advantages to achieve the higher extinction ratio; the output extinction ratio of down wavelength conversion is larger in evidence than that of up wavelength conversion; improving DBR's reflectivity of LOA can also get larger output extinction ratio.