论文部分内容阅读
数值模拟了两种形式的基于电吸收调制晶体 (EAM)的超短光脉冲源 (单 EAM)和级联 EAM形式 )的输出脉冲宽度及消光比与外加反向偏压、射频信号幅度之间的变化关系 .数值模拟结果表明 ,在重复率为 1 0 GHz情况下 ,对于单 EAM形式 ,可以获得的最小脉宽大约为1 3ps,其消光比大于 2 0 d B,脉冲波型接近 sech2孤子波型 ;对于级联 EAM形式 ,我们得到了小于 5ps的超短脉冲 ,消光比也较单 EAM形式有较大的提高 .因此 ,单 EAM形式的超短脉冲源可以满足 2 0 Gb/s的 OTDM系统需求 ,也同样适合于超长距离的光孤子通信系统 ;级联形式 EAM可以满足 40 Gb/s的 OTDM系统光源需求
The output pulse width and extinction ratio of the two forms of ultra-short optical pulse source (EAM) and cascaded EAM (EAM) based on EAM are simulated numerically. The relationship between extinction ratio and applied reverse bias voltage and RF signal amplitude The numerical simulation results show that for the single EAM form, the minimum pulse width obtained is about 13ps with an extinction ratio greater than 20 dB at a repetition rate of 10 GHz and the pulse pattern is close to the sech2 soliton For the cascaded EAM form, we obtain ultrashort pulses less than 5ps and the extinction ratio is much higher than the single EAM form.Thus, the ultra-short pulse source in the form of single EAM can satisfy 20 Gb / s OTDM system requirements, but also suitable for ultra-long-distance optical soliton communication system; Cascading EAM can meet the requirements of 40 Gb / s OTDM system light source