Summary: Pulse±pulse interaction in dispersion-managed ®ber
systems with nonlinear ampli®ers
Nail Akhmedieva,*, Freddy Zenb
, Pak Chuc
Australian Photonics CRC, Optical Science Centre, Research School of Physical Sciences, Australian National University,
Canberra ACT 0200, Australia
Department of Physics, Institute of Technology Bandung, Ganesha 10, Bandung, Indonesia
Department of Electrical Engineering and Computer Studies, University of New South Wales,
P.O. Box 1, Kensington, NSW 2033, Australia
Received 16 September 2001; received in revised form 7 November 2001; accepted 12 November 2001
The pulse±pulse interaction in a dispersion-managed ®ber system is studied for the case when a nonlinear gain and
spectral ®ltering are included into the dispersion-gain map. In this system, the pulse of any shape converges quickly to a
dispersion-managed soliton. Using the technique of interaction plane, we have found stable bound states of two pulses.
The eects we have studied may signi®cantly reduce the chances of pulse coalescence in specially designed optical
transmission lines. Ó 2002 Published by Elsevier Science B.V.
PACS: 42.79.S; 42.81.D; 42.65.W