In this paper, we present 50 GHz spaced 4 ×40 Gbit/s WDM transmission over 700 km using SMF-based Effective Area Enlarged Positive Dispersion Fiber in a recirculating loop. The paper uses bandlimited RZ signals and shows that transmission distance of 700 km can be achieved with BER ≤ 10-9 using 6 ps pulsewidth for each data signal. To attain this, optical filters with sharp transmission characteristics are used in both transmitter and receiver. The results demonstrated in this paper are based on simulation, and the author believes the propagation distance reached in the paper is the longest distance achieved for such system.
J.-X. Cai, C. R. Davidson, M. Nissov, H. F. Li, W. T. Anderson, Y. Cai, L. Li, A. N. Pilipetskii, D. G. Foursa, W. W. Patterson, P. C. Corbett, A. J. Lucero and N. S. Bergano, “Transmission of 40-Gb/s WDM Signals over Transoceanic Distance Using Conventional NZ-DSF with Receiver Dispersion Slope Compensation,” Journal of Lightwave Technology, Vol. 24, No. 1, 2006, pp. 191- 200. doi:10.1109/JLT.2005.861138
S. S. Lee, H.-W. Cho, S.-K. Lim, K.-M. Yoon, Y.-G. Lee, and J. Ko, “Field Trial of 1.6 Tb/s (40 channels × 40 Gb/s) NRZ Signals over 511 km Standard Single Mode Fiber Using Conventional Optical Amplifiers,” IEEE International Conference on Communications (IEEE ICC 2005), Vol. 3, 2005, pp. 1598-1602.
C. M. Weinert, R. Ludwig, W. Pieper, H. G. Weber, D. Breuer, K. Petermann and F. Kuppers, “40 Gb/s and 4×40 Gb/s TDM/WDM Standard Fiber Transmission,” Journal of Lightwave Technology, Vol. 17, No. 11, 1999, p. 2276. doi:10.1109/50.803020
A. Tan and E. Pincemin, “Performance Comparison of Duobinary Formats for 40-Gb/s and Mixed 10/40-Gb/s Long-Haul WDM Transmission on SSMF and LEAF Fibers,” Journal of Lightwave Technology, Vol. 27, No. 4, 2009, pp. 396-408. doi:10.1109/JLT.2008.929117
R. Ludwig, U. Fieste, E. Dietrich, H. G. Weber, D. Breuer, M. Martin and F. Kuppers, “Experimental Comparison of 40Gbit/s RZ And NRZ Transmission over Standard Singlemode Fiber,” Electronics Letters, Vol. 35, No. 25, 1999, pp. 2216-2218. doi:10.1049/el:19991504