By use of the stimulated Raman process, optical solitons can be amplified and reshaped while they propagate through a glass fiber. When an appropriate level is chosen for the pump power (10–100 mW for 10-psec solitons), the solitons can be reshaped adiabatically. The method allows the separation between two repeaters (amplifiers) to be decided by the fiber loss rather than by the fiber dispersion.
© 1983 Optical Society of America
Akira Hasegawa, "Amplification and reshaping of optical solitons in a glass fiber-IV: Use of the stimulated Raman process," Opt. Lett. 8, 650-652 (1983)