Application of SOI microring coupling modulation in microwave photonic phase shifters

Abstract

Phase shifter is one of the key devices in microwave photonics. We report a silicon microring resonator with coupling modulation to realize microwave phase shift. With coupling tuning of the Mach-Zehnder interferometer (MZI) coupler to change the resonator from under-coupling to over-coupling, the device can realize a p phase shift on the incoming microwave signal with a frequency up to 25 GHz. The device can also realize 2.5p continuous phase tuning by manipulating the three DC bias voltages applied on the MZI coupler.

Keywords

ring resonator / phase shifter / microwave photonics

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Acknowledgements

This work was supported in part by the National High Technology Research and Development Program (863 Program) (No. 2013AA014402), the National Natural Science Foundation of China (NSFC) (Grant Nos. 61422508), the Shanghai Rising-Star Program (No. 14QA1402600), and the Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) of Ministry of Education of China (No. 20130073130005). We also acknowledge IME Singapore for device fabrication.

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2016 Higher Education Press and Springer-Verlag Berlin Heidelberg