Title :
640 GBd Phase-Correlated OTDM NRZ-OOK Generation and Field Trial Transmission
Author :
Hao Hu ; Munster, P. ; Palushani, Evarist ; Galili, Michael ; Mulvad, H.C.H. ; Jeppesen, P. ; Oxenlowe, Leif K.
Author_Institution :
Dept. of Photonics Eng., Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
We generate a 640 GBd phase-correlated optical time-division multiplexed (PC-OTDM) return-to-zero ON-OFF keying (RZ-OOK) signal based on cross-phase-modulation-induced cross-polarization rotation in an Al highly nonlinear fiber and a 640 GBd PC-OTDM nonreturn-to-zero (NRZ)-OOK signal by RZ-to-NRZ conversion using passive filtering. This is employed in a 1.19 Tb/s PDM-NRZ-OOK field transmission with BER <; 3.8 × 10-3 for all 128 tributaries. As a benefit of phase coherence between adjacent TDM channels, a PC-OTDM signal can be very tolerant to strict filtering and the bandwidth of the 640 GBd PC-OTDM NRZ-OOK signal can be restricted to 700 GHz. In addition, with a narrower spectrum a PC-OTDM NRZ-OOK signal is more tolerant to chromatic dispersion and polarization-mode dispersion compared to a conventional (i.e., phase-uncorrelated) OTDM RZ signal.
Keywords :
amplitude shift keying; correlation methods; error statistics; optical modulation; passive filters; phase modulation; polarisation; time division multiplexing; BER; RZ-to-NRZ conversion; chromatic dispersion; cross-phase-modulation-induced cross-polarization rotation; field trial transmission; nonlinear fiber; nonreturn-to-zero signal; passive filtering; phase coherence; phase-correlated OTDM NRZ-OOK generation; phase-correlated optical time-division multiplexing; polarization-mode dispersion; return-to-zero ON-OFF keying signal; Bandwidth; Bit error rate; Dispersion; Filtering; Nonlinear optics; Optical filters; Optical signal processing; Field trial transmission; cross-phase modulation (XPM); cross-polarization rotation (CPR); highly nonlinear fiber (HNLF); nonreturn-to-zero (NRZ); phase-correlated optical time-division multiplexing (PC-OTDM);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2012.2225411
