基于电吸收调制器的解复用器窗口特性分析及优化

Switch Window Analysis and Optimization in EAM-Based Demultiplexer

数值模拟了基于电吸收调制器 (Electro absorptionmodulator,EAM)解复用器的开关窗口特性 ,在考虑邻道串扰和强度抖动 (由同步偏离和时间抖动导致 )的光时分复用数值模型中对解复用信号的误码率进行分析。数值模拟结果表明 ,电吸收调制器的窗口特性 (消光比和窗口宽度 )满足 4× 10Gb/s的光时分复用通信系统中解复用器的要求 ;在小的偏置电压下 ,邻道串扰和解复用器的透过率特性必须仔细考虑以达到最小的误码率 ;在大的偏置电压下 。

The switch window of demultiplexer using an electroabsorption modulator (EAM) is simulated and analyzed theoretically combined with the channel crosstalk and intensity fluctuations (synchronization deviation and time jitter). Results show that the characteristic of switch window (extinction ratio and window width) can be used as demultiplexer of 4×10 Gb/s; under small DC reverse bias, the tradeoff between the channel crosstalk and the optical transmissivity of the target signal has to be considered carefully; under large DC reverse bias, the maximum RF amplitude can lead to minimum bit error rate (BER).