2500 km-10 Gbps RZ transmission system based on dispersion compensation CFBGs without electric regenerator

Abstract

The characteristics of chirped fiber Bragg gratings (CFBGs) are optimized so that the ripple coefficient of the power reflectivity spectrum and group time delay are less than 1 dB and |± 15| ps, group delay is about 2600 ps/nm, polarization module dispersion is very small, PMD < 2 ps, -3 dB bandwidth is about 0.35 nm, and insertion loss is about 4–5 dBm. Using dispersion compensation CFBG, a 2500 km-10 Gbps RZ optical signal transmission system on G.652 fiber was successfully demonstrated without an electric regenerator by optimizing dispersion management and loss management. The RZ optical signal was generated through a two-stage modulation method. At 2081 km, the power penalty of transmission is about 3 dB (conditions: RZ signal, BER = 10^-12, PRBS = 10²³ - 1); At 2560 km, the power penalty is about 5 dB. It is superior to the system using NRZ under the same conditions.

Keywords

return to zero (RZ) signal, chirped fiber Bragg grating (CFBG), dispersion compensation, power penalty

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Acknowledgements

The work was jointly supported by the National 863 Plan Project (No. 2001AA122012) and the National Natural Science Foundation of China (Grant No. 60337010).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg