Optical time-slot swapping based on parametric wavelength exchange

We have experimentally demonstrated simultaneous 10-Gb/s optical time-slot swapping between retum-to-zero (RZ) signal format and non-retum-to-zero (NRZ) signal format based on the parametric wavelength exchange (PWE) in the highly-nonlinear dispersion shifted fiber (HNL-DSF). Original RZ and NRZ signals located at two different wavelengths are exchanged after the PWE process. After exchanging between RZ and NRZ signals, the swapping ability involving two different signal formats within particular time slot has been proved. Clear open eye diagrams of periodic mixed RZ and NRZ signals are recorded on both wavelengths.