Automated routing and control of silicon photonic switch fabrics

Andrea Annoni, Emanuele Guglielmi, Marco Carminati, Stefano Grillanda, Pietro Ciccarella, Giorgio Ferrari, Marc Sorel, Michael Strain, Marco Sampietro, Andrea Melloni, Francesco Morichetti

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)
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Automatic reconfiguration and feedback controlled routing is demonstrated in an 8×8 silicon photonic switch fabric based on Mach-Zehnder interferometers. The use of non-invasive Contactless Integrated Photonic Probes (CLIPPs) enables realtime monitoring of the state of each switching element individually. Local monitoring provides direct information on the routing path, allowing an easy sequential tuning and feedback controlled stabilization of the individual switching elements, thus making the switch fabric robust against thermal crosstalk, even in the absence of a cooling system for the silicon chip. Up to 24 CLIPPs are interrogated by a multichannel integrated ASIC wirebonded to the photonic chip. Optical routing is demonstrated on simultaneous WDM input signals that are labelled directly on-chip by suitable pilot tones without affecting the quality of the signals. Neither preliminary circuit calibration nor lookup tables are required, being the proposed control scheme inherently insensible to channels power fluctuations.
Original languageEnglish
Number of pages8
JournalIEEE Journal of Selected Topics in Quantum Electronics
Early online date31 Mar 2016
Publication statusPublished - 8 Apr 2016


  • integrated optics
  • photonic switching systems
  • silicon
  • optical switches
  • optical waveguide


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