University of California

Abhinav Kumar Vinod

Chee Wei Wong

Shu-Wei Huang

Baicheng Yao

Systems and methods in accordance with embodiments of the invention implement all-microwave stabilized microresonator-based optical frequency comb. In one embodiment, an all-microwave stabilized microresonator-based optical frequency comb includes: an optical pump configured to generate pulses of light; a microresonator including an input configured to receive pulses generated by an optical pump and an output configured to generate an optical frequency comb signal characterized by frep and &#x3be;; where frep describes spacing of frequency components in the optical frequency comb; where the optical frequency comb includes a primary comb and a plurality of subcombs and &#x3be; is a frequency offset between subcombs; and two phase locked loops that phase lock frep and &#x3be; to low noise microwave oscillators by modulating output power and pump frequency of the optical pump.

All-microwave stabilization of microresonator-based optical frequency combs

Based on graphene heterostructure in chip-scale silicon nitride microresonators, optoelectronic control and modulation in frequency combs via group velocity dispersion modulation can be demonstrated. By tuning graphene Fermi level from 0.50 eV to 0.65 eV via electric-field gating, deterministic in-cavity group velocity dispersion control from anomalous (&#x2212;62 fs/mm) to normal (+9 fs/mm) can be achieved with Q factor remaining high at 10. Consequently, both the primary comb lines and the full comb spectra can be controllable dynamically with the on/off switching of the Cherenkov radiation, the tuning of the primary comb lines from 2.3 THz to 7.2 THz, and the comb span control from zero comb lines to &#x2dc;781 phase-locked comb lines, directly via the DC voltage.

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Los Angeles, CA, United States of America

Abhinav Kumar Vinod