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Related Experiment Video

Updated: May 18, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Hopf bifurcation to square-wave switching in mutually coupled semiconductor lasers.

M Sciamanna¹, M Virte, C Masoller

¹Supélec, OPTEL Research Group, Laboratoire Matériaux Optiques, Photonique et Systèmes, EA-4423, 2 rue Edouard Belin, F-57070 Metz, France. marc.sciamanna@supelec.fr

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|September 26, 2012

Summary

Researchers explored bifurcations in coupled semiconductor lasers, revealing transitions to stable square-wave pulsing and polarization mode switching. Increased coupling strength drives these complex dynamics, mimicking experimental observations.

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Area of Science:

Physics
Nonlinear Dynamics
Optoelectronics

Background:

Semiconductor lasers exhibit complex dynamics under mutual coupling.
Polarization mode switching and pulsing are critical phenomena in laser operation.

Purpose of the Study:

To elucidate bifurcations leading to stable square-wave pulsing and polarization mode switching.
To analyze the impact of coupling strength on laser dynamics.

Main Methods:

Advanced continuation techniques for dynamical systems.
Analysis of bifurcations in mutually coupled semiconductor lasers.

Main Results:

Cascade of Hopf bifurcations on mixed-mode steady states.
Transcritical bifurcation on pure-mode steady states.
Emergence of time-periodic solutions with periods near relaxation oscillation or time delay.
Evolution of pulsing from harmonic to square-wave forms.

Conclusions:

Coupling strength dictates the transition to complex pulsing and polarization switching.
The study explains experimental observations of square-wave pulsing in lasers.