PILOT TONES IN NETWORKS WITH NONLINEAR ELEMENTS

Transmission of pilot tones for supervision and management of all-opti cal networks deploying nonlinear elements, like interferometric wavele ngth converters, is experimentally investigated, Experiments show that the pilot tone is affected due to the converters nonlinear transfer f unction, A novel scheme to block and reinsert pilot tones using an all -active interferometric Mach-Zehnder wavelength converter is demonstra ted experimentally in a 10-Gb/s all-optical wavelength conversion expe riment, where 30 dB suppression of a similar to 100-kHz pilot tone is obtained.