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Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

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Exploring multistability in semiconductor ring lasers: theory and experiment.

L Gelens¹, S Beri, G Van der Sande

¹Department of Applied Physics and Photonics, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.

Physical Review Letters

|June 13, 2009

Summary

This summary is machine-generated.

Researchers observed multistable states in semiconductor ring lasers for the first time. They demonstrated controlled steering between monostable, bistable, and multistable operation, matching theoretical models.

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Area of Science:

Nonlinear dynamics
Laser physics
Semiconductor devices

Background:

Semiconductor ring lasers exhibit complex dynamical behaviors.
Understanding and controlling these dynamics is crucial for advanced optical applications.
Previous studies have explored bistability, but multistability remains less understood.

Purpose of the Study:

To experimentally observe and characterize multistable states in a single-longitudinal mode semiconductor ring laser.
To demonstrate controlled steering of the laser's dynamical regimes (monostable, bistable, multistable).
To validate theoretical models of laser dynamics against experimental observations.

Main Methods:

Experimental setup utilizing a single-longitudinal mode semiconductor ring laser.
Controlled manipulation of device parameters to induce different dynamical regimes.
Comparison of experimental results with a two-dimensional theoretical model.
Analysis of phase space and stochastic transitions.

Main Results:

First experimental observation of multistable states in this laser type.
Demonstrated controlled transitions between monostable, bistable, and multistable operation.
Observed reproducible sequences of dynamical regimes matching theoretical bifurcation diagrams.
Experimentally confirmed predictions of stochastic transitions between multistable states.

Conclusions:

Multistable states are experimentally observable in single-longitudinal mode semiconductor ring lasers.
Laser dynamics can be controllably steered through different regimes.
Theoretical models accurately predict observed behaviors and transitions, aiding in understanding complex laser dynamics.