介绍光波分复用N×40 Gbps系统的发展现状；其次,阐述光波分复用N×40 Gbps系统的关键技术及调制码型技术( ODB、CSRZ、DRZ、DPSK、D......

An ultra long haul WDM (ULWDM) system in ZTE China is introduced in this report, whose transmission distance has been ex......