Comparison of the compensation effects of fiber nonlinear impairments with mid-span optical phase conjugation between PDM CO-OFDM system and PDM QPSK system
Xu Fei, Guo Meng-Qi, Wang Lei, Qiao Yao-Jun†, 
, Tian Hui-Ping
, Tian Hui-Ping Schematic diagrams of OPC, showing (a) signal spectra before SOA and (b) after SOA.
