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Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light

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Raman-induced localization in Kerr waveguide arrays.

Dima Cheskis¹, Yoav Linzon, Iftach Ilsar

¹School of Physics and Astronomy, Faculty of Exact Sciences, Tel-Aviv University, Tel Aviv 69978, Israel.

|August 19, 2007

Summary

Stimulated Raman scattering stabilizes light propagation in periodic Kerr waveguide arrays by balancing nonlinear and dispersive effects. This prevents collapse and breakup, enabling stable single-site propagation across various input powers.

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Area of Science:

Nonlinear optics
Waveguide optics
Photonics

Background:

Kerr waveguide arrays exhibit complex light dynamics due to nonlinear effects like self-phase modulation and dispersion.
Spatiotemporal compression can lead to catastrophic collapse and breakup of optical beams.
Controlling these instabilities is crucial for stable light propagation in photonic devices.

Purpose of the Study:

To investigate the role of stimulated Raman scattering in stabilizing light propagation within periodic Kerr waveguide arrays.
To determine if stimulated Raman scattering can counteract detrimental effects during spatiotemporal compression.
To establish conditions for stable, single-site propagation of optical beams.

Main Methods:

Numerical simulations of light propagation in a periodic Kerr waveguide array.
Inclusion of stimulated Raman scattering, self-phase modulation, diffraction, and group-velocity dispersion models.
Analysis of beam dynamics across a wide range of input optical powers.

Main Results:

Stimulated Raman scattering effectively counteracts self-phase modulation, diffraction, and group-velocity dispersion.
Collapse and breakup phenomena are eliminated over a broad spectrum of input powers.
Stable propagation of light within a single site of the waveguide array is achieved.

Conclusions:

Stimulated Raman scattering is a key mechanism for achieving stable light propagation in Kerr waveguide arrays.
This finding opens possibilities for robust optical signal transmission and processing in photonic systems.
The study demonstrates a method to control spatiotemporal instabilities in nonlinear optical media.