Analysis of parameter combinations for optimal soliton microcomb generation efficiency in a simple single-cavity scheme

TL;DR

This paper analyzes parameter combinations in a simple single-cavity scheme to optimize soliton microcomb generation efficiency, revealing optimal conditions for maximal pump-to-comb conversion and discussing methods to enhance total comb power.

Contribution

It provides a comprehensive analysis of conditions for maximizing soliton microcomb efficiency in a single-cavity setup, including optimal coupling and pump power relations.

Findings

Achieved up to 100% pump-to-comb conversion efficiency.

Revealed the dependence of optimal coupling rate on pump power.

Discussed methods to increase total comb power.

Abstract

Dissipative Kerr solitons generated in high-Q optical microresonators provide unique opportunities for different up-to-date applications. Increasing the generation efficiency of of such signals is a problem of paramount importance. We provided comprehensive analysis and found optimal conditions providing maximal pump-to-comb conversion efficiency (up to 100\%) for the cases of a free-running and self-injection-locked pump lasers. The dependence of the optimal coupling rate on the pump power was revealed, in addition to the trade-off relations balancing the efficiency and the comb line number. The methods to increase the total comb power were also discussed.