激光器的边模对10Gb/s光四进制传输性能的影响

Influence of the laser's side mode on the performance of 10Gb/s optical quaternary transmission

仿真了10Gb/s光四进制和二进制传输系统,考察了激光器的边模对光的四进制传输和二进制传输的影响,研究发现边模间隔和边模抑制比对四进制传输的影响要比二进制大得多,导致代价较大,因此在实际的光通信系统中,应尽量少用多电平传输.

10Gb/s optical quaternary and binary transmission systems are simulated separately with emphasis on the influence of the laser＇s side mode on the performance of optical quaternary and binary transmission. It is shown that the influence of the laser＇s side mode separation and side mode suppression ratio on the performance of optical quaternary is much greater than that on the performance of optical binary, and the laser＇s side mode results in larger penalty in the quaternary system than in the binary system. Therefore it is necessary to avoid using multilevel transmission in the practical optical communication systems.