Title :
Performance Comparison of Differential 8-Ary Modulation Formats in High-Speed Optical Transmission Systems
Author :
Tipsuwannakul, Ekawit ; Johannisson, Pontus ; Sköld, Mats ; Agrell, Erik ; Karlsson, Magnus ; Andrekson, Peter A.
Author_Institution :
Dept. of Microtechnol. & Nanosci. (MC2), Chalmers Univ. of Technol., Gothenburg, Sweden
Abstract :
This paper presents back-to-back and transmission performance comparisons between single-polarization 120 Gbit/s RZ-DQP-ASK and RZ-D8PSK formats in a single-wavelength system. In the back-to-back configuration, we determine the OSNR requirements of the two formats and compare the results with those obtained analytically and numerically. In the transmission experiments, we examine signal constellations to quantify the significance of intra-channel fiber nonlinearities and investigate the BER performance of the two formats over different reaches (up to 480 km). The results show that the performance of DQP-ASK is superior to D8PSK in back-to-back configuration but is inferior over long distances.
Keywords :
amplitude shift keying; error statistics; optical communication; optical modulation; BER performance; D8PSK; DQP ASK; back to back configuration; differential 8-ary modulation formats; high speed optical transmission systems; performance comparison; single polarization; Bit error rate; Modulation; Optical fibers; Optical noise; Optical transmitters; Receivers; Signal to noise ratio; ASK; D8PSK; DQP-ASK; DQPSK; IFWM; SPM; differential detection; fiber nonlinearities; modulation format; optical transmission;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2163495
