# A phase-space approach to directional switching in semiconductor ring lasers

## TL;DR

This paper introduces a phase-space topological method for switching in semiconductor ring lasers, providing an alternative to optical pulse injection, supported by bifurcation analysis and numerical simulations.

## Contribution

It presents a novel topological approach to switching in semiconductor ring lasers, moving beyond traditional optical pulse methods.

## Key findings

- Topological analysis predicts switching behavior.
- Bifurcation analysis reveals underlying dynamics.
- Numerical simulations confirm theoretical predictions.

## Abstract

We show that a topological investigation of the phase space of a Semiconductor Ring Laser can be used to devise switching schemes which are alternative to optical pulse injection of counter-propagating light. To provide physical insight in these switching mechanisms, a full bifurcation analysis and an investigation of the topology is performed on a two-dimensional asymptotic model. Numerical simulations confirm the topological predictions.