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Related Experiment Video

Updated: Jun 29, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Optical fiber systems are convectively unstable.

A Mussot¹, E Louvergneaux, N Akhmediev

¹Laboratoire de Physique des Lasers, Atomes et Molécules, UMR-CNRS 8523 IRCICA, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France. mussot@phlam.univ-lille1.fr

Physical Review Letters

|October 15, 2008

Summary

Fiber systems exhibit convective instabilities due to nonlocal properties like dispersion and Raman effects, breaking reflection symmetry. This asymmetry in the output power spectrum provides experimental evidence in fiber ring cavities.

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Area of Science:

Nonlinear optics
Fiber optics

Background:

Fiber systems possess nonlocal properties, including dispersion and Raman effects.
These properties can break the inherent reflection symmetry of the system.
Understanding instabilities in optical systems is crucial for device performance.

Purpose of the Study:

To theoretically and experimentally demonstrate that fiber systems are convective systems.
To identify the role of third-order dispersion in creating instabilities.
To establish a criterion for identifying convective instabilities in fiber cavities.

Main Methods:

Theoretical analysis of fiber ring cavities.
Numerical simulations to observe instability emergence.
Experimental verification using a pulsed laser and spectral analysis.

Main Results:

Third-order dispersion in fiber ring cavities leads to convective and absolute instabilities.
An asymmetric output power spectrum is identified as the signature of these instabilities.
Experimental data confirms the presence of convective instabilities in a pulsed laser-pumped fiber cavity.

Conclusions:

Fiber systems are fundamentally convective due to nonlocal effects.
Spectral asymmetry is a reliable indicator of convective instabilities in fiber optics.
The findings have implications for the design and control of nonlinear fiber systems.