First Demonstration of Closed-Loop PWM Wavelength Locking of a Microring Resonator in a Monolithic Photonic-BiCMOS Platform

Microring resonator (MRR) is a versatile photonic device that finds a wide range of applications in communication, computing, and sensing. However, it is susceptible to fabrication, thermal, and laser wavelength variations. This paper presents a PWM wavelength locker for a MRR. The wavelength locker and the MRR have been fabricated in a monolithic photonic BiCMOS platform. The effectiveness of this design is verified by extensive computer simulations. To the best of our knowledge, this is the first closed-loop PWM wavelength locker for MRRs reported in the literature.