Optical Path and Crosstalk Monitoring Technique Using Pilot Tones in All-Optical WDM Transport Network

摘要

We propose and demonstrate a simple and efficient technique to monitor the optical paths in all-optical WDM transport networks using pilot tones. This technique could also monitor the crosstalk increases caused by the partial failures of optical switches in the optical cross-connects. In addition, unlike the other monitoring techniques based on the pilot tones, this technique was insensitive to the cross-gain modulation of EDFA. Thus, the proposed techniques could be used to monitor both the optical paths and switch failures in a large-scale all-optical WDM transport network.