Patent ID: 11815780

Abstract:
An integrated Mach-Zehnder Interferometer comprising: an upper arm and a lower arm; and a differential thermo-optic phase shifter comprising a first heating element and a second heating element collocated with the upper arm and the lower arm, respectively, the first heating element having a first resistance and the second heating element having a second resistance, an upper pad electrically connected to the first heating element, the upper pad being adapted to receive a first voltage, a lower pad electrically connected to the second heating element, the lower pad being adapted to receive a second voltage, and a common pad electrically connected to the first heating element and the second heating element, the common pad being adapted to receive a third voltage; wherein, when the first, the second, and the third voltages are applied to the upper, the lower, and the common pads, respectively, a phase shift difference is thermally produced.