单通道10Gbit/s线路无中继传输距离研究

Study on repeaterless transmission spans of single-channel 10Gbit/s lines

对于10 Gbit/s系统,长距离传输时需要解决线路衰减问题和非线性效应带来的码间干扰问题。目前应用较多的是掺铒光纤放大技术、拉曼放大技术和色散补偿技术等。对这些技术的深入探索和研究,极大地改善了线路传输质量,延伸了线路传输距离。文章重点介绍一种通过提高电吸收(EA)型激光器注入光功率来改善线路传输的信噪比、延伸传输距离的方法。实验证明,当注入光功率达到18 dB时,仍能保证传输质量。

As far as 10 Gbit/s systems are concerned,intersymbol interferences brought about by nonlinear effects must be removed in long-haul transmissions.At present,the dispersion compensation,EDFA and Raman technologies are often applied for this purpose.In-depth researches on these technologies have greatly improved the line transmission quality and extended the repeaterless line transmission span.This paper introduces a method for improving the system OSNR and extending the transmission span by enhancing the input power of the EA laser.Experiments prove that optical input power at 18 dB can still ensure the transmission quality.