作　　者： ; ; ;

机构地区： 华南师范大学信息光电子科技学院

出　　处： 《中国激光》 2004年第12期1495-1499,共5页

摘　　要： 建立了基于半导体光放大器-交叉增益调制(SOA-XGM)的波长转换理论模型,利用分段方法对交叉增益调制波长转换器同向和相向两种工作方式下消光比(ER)特性作了详细的研究。结果表明,波长转换器的输出消光比随转换速率增加而减小,而且转换速率越高,减小得越快;随着抽运波长的变化,消光比有一个对应于峰值增益波长的最佳抽运波长;波长向下转换(Δλ<0)时的消光比要明显优于向上转换(Δλ>0);输出消光比也随着输入消光比的增大而增大。相同情况下相向工作方式时的输出消光比特性要优于同向工作方式。最后,从物理上对两种工作方式消光比和噪声特性的差异作了解释。 A theoretical model of wavelength conversion based on cross gain modulation (XGM) in semiconductor optical amplifier (SOA) is derived. Characteristics of extinction ratio (ER) of converted signal under both co- and counter-propagating scheme are discussed in details. It is shown that the ER of output probe would decrease with the increase of the bit rate of signal, and the larger the bit rate of the signal is, the faster the ER of the output probe decreases. The ER attains optimal value when the pump wavelength is equal to the small signal gain peak wavelength. The ER of down wavelength conversion (Δλ<0) is larger in evidence than that of up wavelength conversion (Δλ>0). The ER of output probe would be larger as the increase of ER of input signal. And the ER characteristic of output probe of counter-propagating scheme is better than that of co-propagating scheme under the same condition. Finally, the characteristic difference for two schemes is explained from physical layer.

关 键 词： 光纤通信技术 波长转换器 消光比 交叉增益调制 半导体光放大器

领　　域： [电子电信] [电子电信]