Efficiency of optical regeneration utilizing self-phase modulation (SPM) in a highly nonlinear fiber (HNF) is analyzed. The regeneration capability with respect to timing and amplitude of signal pulses are obtained by synchronous modulation and narrow-band filtering together with the SPM in HNF. This is a lumped version of inline soliton control. It is also shown that such a regeneration is effective in suppressing impairments caused by intrachannel four-wave mixing in highly dispersed pulse transmission.
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Masayuki Matsumoto (2002) studied this question.
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