Globalfoundries U.S. Inc.

Prateek Kumar Sharma

Kenneth John Giewont

Michal Rakowski

Kevin K Dezfulian

Venkata Narayana Rao Vanukuru

Vaibhav A Ruparelia

Indranil Som

Riddhi Nandi

Vasudeva Reddy KuppiReddy

Avijit Chatterjee

Disclosed is a thermal stabilization circuit including a heater, which is adjacent and thermally coupled to a closed-curve waveguide of an optical ring resonator, and an analog feedback circuit, which includes a fully autonomous analog feedback loop from a drop port of a bus waveguide of the optical ring resonator to the heater. This analog feedback circuit is configured to dynamically control the electrical power provided to the heater and, thereby to dynamically control the thermal output of the heater in order to tune the ring resonance wavelength to the operating laser wavelength. The analog feedback circuit is further configured to be independent of input power, to be power efficient, to have a relatively small footprint, to have a tunable time constant and to facilitate adjustable wavelength locking. Also disclosed is a device (e.g., a ring-based transceiver or the like), which includes multiple optical ring resonators and corresponding thermal stabilization circuits.

Thermal stabilization circuit for an optical ring resonator

Structures including an inductor and methods of forming such structures. The structure comprises a semiconductor substrate including a first plurality of sealed cavities and a back-end-of-line stack on the semiconductor substrate. Each sealed cavity includes an air gap, and the back-end-of-line stack includes an inductor having a winding that overlaps with the scaled cavities.

Inductors with airgap electrical isolation

Growing community of inventors

Bengaluru, India

Prateek Kumar Sharma