Abstract

A silicon-on-insulator microring with three superimposed gratings is proposed and characterized as a device enabling $3\times 3$ optical switching based on orbital angular momentum and wavelength as switching domains. Measurements show penalties with respect to the back-to-back of $<1\mathrm{dB}$ at a bit error rate of ${10}^{-9}$ for OOK traffic up to 20 Gbaud. Different switch configuration cases are implemented, with measured power penalty variations of less than 0.5 dB at bit error rates of ${10}^{-9}$. An analysis is also carried out to highlight the dependence of the number of switch ports on the design parameters of the multigrating microring.

© 2017 Optical Society of America

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