Abstract

We fabricate a tunable optical true time delay (OTTD) lines based on arrayed waveguide gratings (AWG) and spirals in the SiNx platform. The AWG measurements show an insertion loss of about 6.5 dB of TE mode and a crosstalk of <-10 dB, and loss of the spirals is about 2.6 dB/cm.

© 2017 Optical Society of America

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