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Hybrid InP and SiN integration of an octave-spanning frequency comb

Published

Author(s)

Travis Briles, Su P. Yu, Lin Chang, Chao Xiang, Joel Guo, David Kinghorn, Gregory Moille, Kartik Srinivasan, John E. Bowers, Scott Papp

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, like 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 back-scattering and laser-microresonator frequency detuning that we uncover here. Our work illustrates critical considerations towards realizing a self-referenced frequency comb with integrated photonics.
Citation
Applied Physics Letters Photonics

Keywords

Frequency comb, microresonator, photonic integration, soliton, self-injection locking

Citation

Briles, T. , Yu, S. , Chang, L. , Xiang, C. , Guo, J. , Kinghorn, D. , Moille, G. , Srinivasan, K. , Bowers, J. and Papp, S. (2021), Hybrid InP and SiN integration of an octave-spanning frequency comb, Applied Physics Letters Photonics, [online], https://doi.org/10.1063/5.0035452 (Accessed April 19, 2024)
Created February 2, 2021, Updated March 25, 2024