全双工直接调制激光器光网络单元的优化研究

光放大器是光通信的关键组成部分。对半导体光放大器的算法模型进行优化与测试,系统的分析了建模运放的增益和噪声指数。测试结果表明,半导体光放大器的最佳幅度调制条件是输入-5dBm的功率与选择100mA的偏置电流,最佳相位调制条件是输入-20dBm的功率与选择100mA的偏置电流。分析并搭建了通信速率为2.5 Gb/s的20km双向传输通信系统,对半导体光放大器和分布反馈激光器集成的光网络单元进行了上行链路和下行链路的双向与单向传输测试。在前向误码率要求为2.4×10-4时,双向传输的上行接收灵敏度达到 -22.4dBm,下行接收灵敏度达到 -31.4dBm；单向传输的上行下行接收灵敏度分别达到 -22.7dBm 和-31.6dBm。

Research on optimization of optical networkunit of full-duplex direct modulation laser

Optical amplification constitutes a key component of optical telecommunication.The gain and noise figure of the model operational amplifier are analyzed systematically by optimizing and testing the algorithm model of semiconductor optical amplifier.The results show that the optimal conditions for amplitude modulation or phase modulation is the bias current of 100 mA and input power of -5 dBm or -20 dBm,respectively.The 20km bidirectional transmission communication system with a communication rate of 2.5 Gb/s is analyzed and built,the bidirectional and unidirectional transmission of upstream and downstream for optical network unit integrated with semiconductor optical amplifier and distributed feedback laser is tested.When forward bit error rate is 2.4×10 -4,the sensitivities reach -22.4 dBm and -31.4 dBm for bidirectional upstream and downstream,and the sensitivities reach -23.4 dBm and -23.8 dBm for unidirectional upstream and downstream,respectively.