Comparison of DPSK and RZ-DPSK Modulations in Optical Channel with Speed of 10 Gbps

  • Petr Ivaniga Department of Information Networks, Faculty of Management Science and Informatics, University of Žilina
  • Tomáš Ivaniga Department of Electronic and Multimedia Communications, Faculty of Electrical Engineering and Informatics, University of Technology Košice
Keywords: BER, DPSK, RZ-DPSK, Q-factor, SNR


This article is devoted to the problematic of error rate and modulations in optical communication. Optic waveguide shows insufficiencies in high speed transfers manifested by corrupted transfer. Although modern technological processes contributed to lowering these insufficiencies, it would be uneconomical to completely reconstruct the optical network infrastructure. The solution is only partial so we approach more economical methods, such as modulations. The article works with a 10 Gbps channel with two modulation types, namely DPSK (Differential Phase Shift Keyed) and RZ-DPSK (Return to Zero-Differential Phase Shift Keyed). These modulations are evaluated and compared according to BER (Bit Error Rate) and Q-factor.