applied sciences Article
SOA Based Photonic Integrated WDM Cross-Connects for Optical Metro-Access Networks Nicola Calabretta *, Wang Miao, Ketemaw Mekonnen and Kristif Prifti IPI—Institute of Photonic Integration, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands;
[email protected] (W.M.);
[email protected] (K.M.);
[email protected] (K.P.) * Correspondence:
[email protected]; Tel.: +31-40-247-5361 Received: 30 July 2017; Accepted: 18 August 2017; Published: 23 August 2017
Abstract: We present a novel optical metro node architecture that exploits the Wavelength Division Multiplexing (WDM) optical cross-connect nodes for interconnecting network elements, as well as computing and storage resources. The photonic WDM cross-connect node based on semiconductor optical amplifiers (SOA) allows switching data signals in wavelength, space, and time for fully exploiting statistical multiplexing. The advantages of using an SOA to realize the WDM cross-connect switch in terms of transparency, switching speed, photonic integrated amplification for loss-less operation, and gain equalization are verified experimentally. The experimental assessment of a 4 × 4 photonic integrated WDM cross-connect confirmed the capability of the cross-connect chip to switch the WDM signal in space and wavelength. Experimental results show lossless operation, low cross-talk
