J4 ›› 2009, Vol. 36 ›› Issue (4): 669-674.

• Original Articles • Previous Articles     Next Articles

Demodulation scheme and transmission performance study  of the DOPSK signal in optical communication

LI Xiao-jun1,2;LIU Zeng-ji1;WEN Ai-jun1;Lü Liang1   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. School of Science, Xidian Univ., Xi'an  710071, China)
  • Received:2008-12-01 Online:2009-08-20 Published:2009-09-28
  • Contact: LI Xiao-jun E-mail:xjli@xidina.edu.cn

Abstract:

Based on the principle of the Mach-Zehnder Delay interferometer and balanced detector, an improved demodulation method is suggested for the ODOPSK modulation format. It is theoretically proved that this method could be used to demodulate the DOPSK signal correctly. Then the transmission performance of RZ-DOPSK in the single-channel is simulatively studied. It is shown that the chromatic dispersion tolerance of RZ-DOPSK is larger than that of other modulation formats, and that the nonlinear tolerance is smaller than that of RZ-DQPSK and RZ-DBPSK, but much larger than that of RZ-BASK.

Key words: optical communication, chromatic dispersion, fibers, nonlinear optics, phase modulation

CLC Number: 

  • TN929. 11