Efficiency of dispersive wave generation from a dual-frequency beat signal

TL;DR

This paper investigates how the efficiency of dispersive wave generation from a dual-frequency beat signal is influenced by the frequency detuning of pump lasers, combining experimental, numerical, and analytical approaches.

Contribution

It provides new insights into the role of frequency detuning and soliton dynamics in dispersive wave generation, supported by experimental and theoretical analysis.

Findings

Efficiency varies non-trivially with detuning

Higher-order soliton dynamics influence DW generation

Analytical models match experimental results

Abstract

The emission of dispersive waves (DWs) by temporal solitons can be described as a cascaded four-wave mixing process triggered by a pair of monochromatic continuous waves (CWs). We report experimental and numerical results demonstrating that the efficiency of this process is strongly and non-trivially affected by the frequency detuning of the CW pump lasers. We explain our results by showing that individual cycles of the input dual-frequency beat signal can evolve as higher-order solitons whose temporal compression and soliton fission govern the DW efficiency. Analytical predictions based on the detuning dependence of the soliton order are shown to be in excellent agreement with experimental and numerical observations.