摘要
AO-OFDM(全光正交频分复用)技术是利用光处理方式实现多载波和OIDFT(光离散傅里叶逆变换)/ODFT(光离散傅里叶变换),其优势在于能提高处理速率、降低能量消耗。文章结合AO-OFDM技术和单通道100Gbit/s DP-QPSK(双偏振四相相移键控)高阶调制技术,实现了谱效率达到2.7bit/s/Hz的400Gbit/s高速传输系统,在色散完全补偿情况下,实现了最大SEDP(谱效率-距离积重)为3 564km.bit/s/Hz的传输,并利用插入12.5%循环前缀的方式,使得系统色散容限达到70ps/nm。实验结果表明,采用AO-OFDM技术的系统具有优良的传输性能,可以作为下一代400Gbit/s高速传输系统实际应用的方案。
The All-Optical Orthogonal Frequency-Division Multiplexing （AO-OFDM） technology is used to implement multicarriers and Optical Inverse Discrete Fourier Transform （OIDFT）/Optical Discrete Fourier Transform （ODFT） by way of optical processing, which has the advantages of improving the processing rate and reducing power consumption. By using the AO- OFDM technology in combination with the single-channel 100 Gbit/s DP-QPSK high-order modulation technology, we can realize a 400 Gbit/s transmission system with a spectral efficiency of 2.7 bit/s/Hz and when the chromatic dispersion is completely compensated, we achieve a transmission with the maximum Spectral Efficiency-Distance Product （ SEDP ） of 3 564 km. bit/s/Hz. With 12. 50//00 Optical Cyclic Prefixes （OCPs） inserted, the system dispersion tolerance reaches 70 ps/nm. The experimental results show that using the AO-OFDM technology, the system has better performances and can be used as a practical application scheme for next generation 400 Gbit/s transmission systems.
出处
《光通信研究》
北大核心
2012年第6期17-20,共4页
Study on Optical Communications
基金
国家"九七三"计划资助项目(2010CB328300)
