Wavelength-Shift-Free Adjustment of the Pulsewidth in Return-to-Zero On–Off Keyed Signals by Means of Pulse Compression in Distributed Raman Amplification

A wavelength-shift-free adjustment of pulsewidth in return-to-zero on-off keyed signals is demonstrated by means of adiabatic pulse compression in distributed Raman amplification. The pulsewidth of output signal can be controlled by adjusting the launched pump power into the distributed Raman amplifier. We have successfully demonstrated high conversion performances with low power penalties of less than 1.0 dB at bit-error-rate =10^-9 in a wide pulsewidth tuning range between 13.0 and 3.06 ps at 10 Gb/s.