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Frontiers of Optoelectronics

Front Optoelec    2012, Vol. 5 Issue (3) : 322-329     DOI: 10.1007/s12200-012-0261-2
Simulation and comprehensive assessment of single channel RZ-DPSK optical link by dispersion management with channel bit rate beyond 40 Gbits/s
Hamidine MAHAMADOU1, Xiuhua YUAN1(), Eljack M. SARAH2, Weizheng ZOU1
1. Wuhan National Laboratory for Optoelectronics, College of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Department of Electronics Engineering, College of Engineering, Sudan University of Science and Technology, Khartoum 11111, Sudan
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This paper studied the influence of return to zero-differential phase-shift-keying (RZ-DPSK) data format on techniques of pre-, post- and pre/post combination dispersion compensation for faithful transmission of optical signal at 80 and 100 Gbits/s channel bit rate via simulation. The purpose of this study was to find out the dispersion compensation techniques for optimal transmission with the interaction effects of self-phase modulation (SPM) and amplifier spontaneous emission (ASE) for RZ-DPSK encoded optical data. By the simulation method, it was found out that the RZ-DPSK data format can be allowed with a transmission distance of about 700 km of standard single mode fiber (SMF) at 100 Gbits/s, and it can be provided with farther transmission distance of more than 1000 km at 80 Gbits/s with the combination of the pre- and post-compensation technique. To efficiently suppress the effect of ASE and improve optical signal-to-noise ratio (OSNR), the bandwidth frequency of optical receiver filter was found to be at least equal to bit rate.

Keywords return to zero-differential phase-shift-keying (RZ-DPSK)      dispersion compensation      self-phase modulation (SPM)      amplifier spontaneous emission (ASE)      bit rate      optical filter bandwidth     
Corresponding Authors: YUAN Xiuhua,   
Issue Date: 05 September 2012
 Cite this article:   
Hamidine MAHAMADOU,Xiuhua YUAN,Eljack M. SARAH, et al. Simulation and comprehensive assessment of single channel RZ-DPSK optical link by dispersion management with channel bit rate beyond 40 Gbits/s[J]. Front Optoelec, 2012, 5(3): 322-329.
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Xiuhua YUAN
Eljack M. SARAH
Weizheng ZOU
Fig.1  Pre-compensation dispersion scheme
Fig.2  Post-compensation dispersion compensation scheme
fiberα/(dB·km-1)D/(ps/km-nm)S/(ps/km-nm2)Aeff/μm2n2/(10-20 m2·W-1)
Tab.1  Fiber parameters
Fig.3  Pre/post-compensation dispersion compensation scheme
80 Gibits/s
Full simulation1919.224.423.423.628.3
noise free40404031.44040
100 Gbits/s
full simulation14.614.820.219.2019.423.9
Noise free30.229.83029.529.928.6
Tab.2  factor (dB) variations for the worse case and the threshold input powers to the reach of the ASE limit effects on span input power
Fig.4  factor(dB) at various span input power with noise and nonlinearities with chromatic dispersion and attenuation fully compensated at channel bit rate (a) 80 Gbits/s, (b) 100Gbits/s
Fig.5  factor (dB) at various span input power without noise with chromatic dispersion and attenuation fully compensated for each span at channel bit rate (a) 80 Gbits/s, (b) 100 Gbits/s
Fig.6  Log BER as the function of transmission distance for single channel simulation with both nonlinearities and noise (a, b); without noise (c, d) and without nonlinearities (e, f) at 80 and 100Gbits/s
Fig.7  factor vs link distance for optical filter bandwidth () equal to bit rate and twice the bit rate at 80 (a) and 100Gbits/s (b)
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