Multi-Channel NRZ/RZ-DPSK to CSRZ-DPSK Format Conversion Based on Nonlinear Polarization Rotation of SOA
Ya-Ya Mao1**, Chong-Qing Wu2, Xin-Zhi Sheng2, Bo Liu1, Rahat Ullah1, Feng Tian1
1Institute of Optoelectronics, Nanjing University of Information Science & Technology, Nanjing 210044 2Key Lab of Luminescence and Optical Information Technology (Ministry of Education), School of Science, Beijing Jiaotong University, Beijing 100044
Abstract：We present an all-optical nonreturn-to-zero/return-to-zero (NRZ/RZ) to carrier-suppressed return-to-zero (CSRZ) format conversion scheme for differential phase-shift keying (DPSK) signals. The conversion is based on nonlinear polarization rotation of a semiconductor optical amplifier (SOA). The 4-channel NRZ-DPSK or RZ-DPSK signals at 10 Gb/s are simultaneously converted to the corresponding CSRZ-DPSK signals, with $-$0.8 and 1.4 dB average power penalties, respectively. Additionally, high quality format conversion performances are shown with the optical spectra and eye diagrams.
2017, Vol. 34 
