All-optical wavelength shifting of subcarrier channels using difference-frequency-generation in a PPLN

Summary form only given. It may be critical for future networks to provide wavelength shifting and subcarrier modulation to ensure high-throughput performance. Wavelength shifting is important because it enables wavelength reuse, contention resolution and efficient use of the wavelength domain. Similarly, subcarrier modulation is important for data grooming, bandwidth allocation flexibility, control/header information transportation, and access networks. In this paper, we demonstrate and characterize all-optical wavelength shifting of subcarrier channels in a periodically poled lithium niobate (PPLN) structure.