Monolithic Kerr and electro-optic hybrid microcombs
Abstract
Microresonator-based soliton generation promises chip-scale integration of optical frequency combs for applications spanning from time keeping to frequency synthesis. Access to the soliton repetition rate is a prerequisite for those applications. While miniaturized cavities harness Kerr nonlinearity and enable terahertz soliton repetition rates, such high rates are not amenable to direct electronic detection. Here, we demonstrate hybrid Kerr and electro-optic microcombs using a lithium niobate thin film that exhibits both Kerr and Pockels nonlinearities. By interleaving the high-repetition-rate Kerr soliton comb with the low-repetition-rate electro-optic comb on the same waveguide, wide Kerr soliton mode spacing is divided within a single chip, allowing for direct electronic detection and feedback control of the soliton repetition rate. Our work establishes an integrated approach to electronically access terahertz solitons, paving the way for building chip-scale referenced comb sources.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 14, 2022
- Source ID
- 10.1364/optica.462055
Entities
People
- Hong X Tang
- Joshua B Surya
- Juanjuan Lu
- Mohan Shen
- Zheng Gong
Organizations
- Defense Advanced Research Projects Agency
- National Science Foundation
- United States Department of Energy
- Yale University