What is it about?

This is a tutorial article about Pure Quartic Solitons, which were discovered in 2016. They are unusual in that they rely on quartic dispersion, i.e., the wavenumber depends on the fourth power of the frequency, rather than quadratically as for conventional solitons. This gives these solitons unique properties, for example in how the soliton energy depends on its width. We discuss experimental, theoretical and numerical aspects of these solitons as well as their applications.

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Why is it important?

Solitons have been studied for decades and many variations on the basic elements have been investigated. For example, solitons with more general nonlinear effects, coupled solitons, polarisation effects. However, the dispersion has always been taken to be quadratic, at least to some approximation. This work, in which higher order dispersion dominates, thus represents a novel line of soliton research, and may also have applications in soliton lasers.


This was a great opportunity to write a comprehensive paper with a group of long-standing collaborators.It was a truly a please to pull all the different research strands together in a single manuscript.

Martijn de Sterke
University of Sydney

Read the Original

This page is a summary of: Pure-quartic solitons and their generalizations—Theory and experiments, APL Photonics, September 2021, American Institute of Physics, DOI: 10.1063/5.0059525.
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