Automated Routing and Control of Silicon Photonic Switch Fabrics
- 8 April 2016
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Selected Topics in Quantum Electronics
- Vol. 22 (6) , 169-176
Abstract
Automatic reconfiguration and feedback controlled routing is demonstrated in an $8 \times 8$ silicon photonic switch fabric based on Mach–Zehnder interferometers. The use of noninvasive contactless integrated photonic probes (CLIPPs) enables real-time 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 wire bonded to the photonic chip. Optical routing is demonstrated on simultaneous WDM input signals that are labeled 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.Keywords
Funding Information
- Seventh Framework Programme (FP7-ICT 323734 BBOI)
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