Hybrid InP and SiN integration of an octave-spanning frequency comb
Abstract
Implementing optical-frequency combs with integrated photonics will enable wider use of precision timing signals. Here, we explore the generation of an octave-span, Kerr-microresonator frequency comb using hybrid integration of an InP distributed-feedback laser and a SiN photonic-integrated circuit. We demonstrate electrically pumped and fiber-packaged prototype systems, enabled by self-injection locking. This direct integration of a laser and a microresonator circuit without previously used intervening elements, such as optical modulators and isolators, necessitates understanding self-injection-locking dynamics with octave-span Kerr solitons. In particular, system architectures must adjust to the strong coupling of microresonator backscattering and laser-microresonator frequency detuning that we uncover here. Our work illustrates critical considerations toward realizing a self-referenced frequency comb with integrated photonics.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 01, 2021
- Source ID
- 10.1063/5.0035452
Entities
People
- Chao Xiang
- David Kinghorn
- Grégory Moille
- Joel Guo
- John E. Bowers
- Kartik Srinivasan
- Lin Chang
- Scott B. Papp
- Su-Peng Yu
- Travis C. Briles
Organizations
- Defense Advanced Research Projects Agency
- Joint Quantum Institute
- National Institute of Standards and Technology
- University of California, Santa Barbara
- University of Colorado