Photonic integrated circuit incorporating a bandgap temperature sensor

摘要

An optical device that includes means for thermal stabilization and control is described. The optical device can be a ring resonator, or another device that requires accurate control of the phase of the optical signal. In an example involving an optical resonator, a thermal stabilization system includes a temperature sensor, a control circuit, and a heater local to the resonator. The temperature sensor can be a bandgap temperature sensor formed of a pair of matched p/n junctions biased in operation at different junction currents.

主权项

1. A device comprising:
a semiconductor photonic integrated circuit (PIC) comprising: at least one integrated optical device comprising an optical resonator; a temperature sensor comprising first and second p/n junctions integrated with the optical resonator, wherein the first and second p/n junctions are operable to produce one or more electrical signals that are indicative of a temperature of the optical resonator; and a temperature control element integrated with the optical resonator, the temperature control element operable to adjust the temperature of the optical resonator responsive to an electrical temperature control signal, wherein the first and second p/n junctions are spaced from the temperature control element by at least 10 microns so as to lessen effects of local thermal gradients near the temperature control element on said p/n junctions.