10-Gb/s Repeaterless Transmission Using Standard Single-Mode Fiber With Pre-Chirping and Dispersion Compensation Techniques

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This paper proposes that a combination of pre-chirping and dispersion compensation is effective in suppressing the waveform distortion due to the self-phase modulation and the group-velocity dispersion in 10Gb/s repeaterless transmission using 1.3-μm zero-dispersion single-mode fibers (SMF) operating at a wavelength of 1.55μm. The following results were obtained through simulation. 1) Setting the α-parameter of a LiNbO_3 optical modulator negative (α=-1.0)gives a large tolerance of the launched power P_<in>. 2) For 90-km SMF transmission, the maximum P_<in> is obtained when the dispersion compensation ratio β is from 50% to 70%. 3) For the allowable β as a function of the transmission distance when a dispersion compensator is located in the receiver (post-compensation scheme), the lower limit of β is determined by the constant residual dispersion value, which agrees well with the dispersion tolerance without dispersion compensation. Our 90-km SMF transmission experiments using a LiNbO_3 optical modulator and a dispersion compensating fiber (DCF) confirmed the simulation results regarding the optimum value of β and the large tolerance of the fiber launched power. Based on the above investigations, we achieved a 10-Gb/s repeaterless 140-km SMF transmission with α=-1.0 and post-compensation.
社団法人電子情報通信学会の論文
1995-01-25