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We first-time demonstrate gray-scale control by pulse-width modulation for silicon thermo-optic (TO) phase shifters using monolithic MOSFET. This work enables simple and power efficient control of TO modules without using DAC and analog current drivers.
This invited talk will review our work on the monolithic integration of the MOSFET and the thermo-optic (TO) based Mach-Zehnder switch (MZS) using the front-end process on the photonic SOI platform. This MOSFET was capable of driving the TO phase shifter because of its large current capability. By tuning the gate voltage of the MOSFET, the switching state of MZS was successfully controlled. We will...
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