针对光纤通信领域技术热点Tbit/s高速光传输开展研究，分析了其关键的信道内复用技术。基于频谱效率、性能和可实现性，在对Nyquist波分复用、正交频分复用和SuperNyquist三种技术进行比较后给出了对信道内复用技术的具体选择，并提出具有指导意义的Tbit/s高速光传输商用技术解决方案。

As Tbit/s highrate optical transmission has become a technological hotspot in the field of fiberoptic communication, this paper analyzes its key technology, intrachannel multiplexing. On the basis of comparing three technologies, i.e. NyquistWDM, OFDM and SuperNyquist in terms of spectral efficiency, performance and feasibility, it gives the specific selection and presents an instructive technological solution to the commercial applications of Tbit/s highrate optical transmissions.