Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

Oscillations In An LC Circuit

Oscillations In An LC Circuit

An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by

Forced Oscillations

Forced Oscillations

When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Mechanistic origins of temperature scaling in the early embryonic cell cycle.

Nature communications·2025

Same author

The nuclear-cytoplasmic ratio controls the cell-cycle period in compartmentalized frog egg extract.

Current biology : CB·2025

Same author

Mechanistic origins of temperature scaling in the early embryonic cell cycle.

bioRxiv : the preprint server for biology·2025

Same author

Wave-driven phase wave patterns in a ring of FitzHugh-Nagumo oscillators.

Physical review. E·2024

Same author

Transfer learning for photonic delay-based reservoir computing to compensate parameter drift.

Nanophotonics (Berlin, Germany)·2024

Same author

Spatial heterogeneity accelerates phase-to-trigger wave transitions in frog egg extracts.

Nature communications·2024

Search research articles

Related Experiment Video

Updated: May 18, 2026

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Published on: August 8, 2025

Square-wave oscillations in semiconductor ring lasers with delayed optical feedback.

Lilia Mashal¹, Guy Van der Sande, Lendert Gelens

¹Applied Physics Research Group (APHY), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium. lmashal@vub.ac.be

|October 6, 2012

Summary

This summary is machine-generated.

Delayed optical cross-feedback in semiconductor ring lasers can induce robust square-wave oscillations. These oscillations involve regular switching between counter-propagating modes, persisting with minor asymmetry in linear coupling.

More Related Videos

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Related Experiment Videos

Last Updated: May 18, 2026

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Published on: August 8, 2025

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Area of Science:

Optics and Photonics
Semiconductor Lasers
Nonlinear Dynamics

Background:

Semiconductor ring lasers exhibit complex dynamics under optical feedback.
Understanding feedback mechanisms is crucial for laser device applications.

Purpose of the Study:

To investigate the effects of delayed optical cross-feedback in semiconductor ring lasers.
To identify conditions leading to novel oscillation behaviors.

Main Methods:

Experimental analysis of semiconductor ring lasers.
Theoretical modeling of optical feedback effects.
Parameter variation to study oscillation stability.

Main Results:

Delayed optical cross-feedback can induce stable square-wave oscillations.
Oscillations occur when one directional mode is fed back into the counter-propagating mode.
Switching period is approximately twice the external loop roundtrip time.
Oscillations are robust across a range of parameters with slight linear coupling asymmetry.

Conclusions:

Square-wave oscillations are a significant dynamic regime in semiconductor ring lasers with delayed cross-feedback.
Feedback strength and injection current influence the stability of these oscillations.
Mode-hopping phenomena are observed near the transition regions due to noise.