Abstract

This paper reports on the results of the design, fabrication, and experimental demonstration of a wavelength routing Thin-CLOS system based on arrayed waveguide grating routers (AWGRs) for intra-data-center applications. By using $M^2$ $W$-port AWGRs, this architecture allows increasing by a factor of $M$ the scalability provided by a wavelength router using a single $W$-port AWGR. The fabricated Thin-CLOS system has 64 ports and makes use of $M^2=4$ AWGRs with $W=32$ ports and 100 GHz channel spacing. The system fits in a 1U rack enclosure and consumes less than 10 W. We demonstrated error-free performance at $10\mathrm{Gb}/\mathrm{s}$ per wavelength with a power penalty of $<3\mathrm{dB}$ under a worst-case crosstalk scenario. The adopted 64-port Thin-CLOS architecture makes use of four 32-port silica AWGRs to reduce the impact of in-band crosstalk while guaranteeing nonblocking connectivity among the 64 ports and using only $W=32$ distinct wavelengths.

© 2018 Optical Society of America

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