Bandwidth and Conversion-Efficiency Analysis of Kerr Soliton Combs in Dual-Pumped Resonators with Anomalous Dispersion

TL;DR

This paper analyzes Kerr soliton combs in dual-pumped resonators with anomalous dispersion, optimizing pump parameters to enhance efficiency and bandwidth, and providing a detailed performance quantification.

Contribution

It extends the Lugiato-Lefever model to dual-tone pumping, offering new insights into optimizing single-soliton combs in microresonators.

Findings

Optimal detuning and power division improve comb performance.

Quantitative metrics for single-soliton states are established.

Performance trends are characterized over relevant parameters.

Abstract

Kerr frequency combs generated in high-Q microresonators offer an immense potential in many applications, and predicting and quantifying their behavior, performance and stability is key to systematic device design. Based on an extension of the Lugiato-Lefever equation we investigate in this paper the perspectives of changing the pump scheme from the well-understood monochromatic pump to a dual-tone configuration simultaneously pumping two modes. For the case of anomalous dispersion we give a detailed study of the optimal choices of detuning offsets and division of total pump power between the two modes in order to optimize single-soliton comb states with respect to performance metrics like power conversion efficiency and bandwidth. Our approach allows also to quantify the performance metrics of the optimal single-soliton comb states and determine their trends over a wide range of technically relevant parameters.