Stability of synchronous intensity modulation control of 40-Gb/s dispersion-managed soliton transmissions

The efficiency of transmission control of dispersion-managed solitons by me ans of in-line synchronous intensity modulation is numerically analyzed. We demonstrate that intensity modulation may lead to dramatic improvements in the transmission performance of 40-Gb/s dispersion-managed solitons, In pa rticular, we identify the locations within the dispersion map where synchro nous intensity modulation provides an efficient control of the pulse propag ation. Namely, a stabilization of pulse energy fluctuations is achieved, wi th no need for additional in-line control by guiding filters. On the other hand, incorrectly placed intensity modulation may cause significant pulse i nstabilities.