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Updated: Jun 20, 2026

Patterning via Optical Saturable Transitions - Fabrication and Characterization
08:19

Patterning via Optical Saturable Transitions - Fabrication and Characterization

Published on: December 11, 2014

Spatial instabilities, all-optical limiting, and thresholding in nonlinear distributed-feedback devices.

A Mecozzi, S Trillo, S Wabnitz

    Optics Letters
    |September 11, 2009
    PubMed
    Summary
    This summary is machine-generated.

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    Nonlinear distributed-feedback structures exhibit spatial instability in Bragg coupling, causing intensity-dependent transmission plateaus. This phenomenon leads to significant optical limiting effects and lower thresholding in reflection modes.

    Area of Science:

    • Nonlinear optics
    • Photonics
    • Condensed matter physics

    Background:

    • Distributed-feedback (DFB) structures are crucial for controlling light propagation.
    • Nonlinear optical effects in DFB structures can lead to complex behaviors.
    • Bragg coupling describes the interaction of counterpropagating modes within periodic structures.

    Purpose of the Study:

    • To investigate the spatial stability of coupled-mode solutions in nonlinear DFB structures.
    • To analyze the impact of intensity-induced Bragg coupling on mode behavior.
    • To understand the resulting optical limiting and thresholding characteristics.

    Main Methods:

    • Solving coupled-mode equations for counterpropagating modes.
    • Analyzing the stability of solutions under nonlinear conditions.

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  • Characterizing intensity transmission and reflection properties.

    • Main Results:

    • Spatial instability was identified in solutions describing Bragg coupling.
    • Instability results in nonpassing plateaus in intensity transmission.
    • Strong optical limiting in transmission and lower thresholding in reflection were observed.

    Conclusions:

    • Intensity-induced Bragg coupling in nonlinear DFB structures can lead to spatial instabilities.
    • These instabilities are responsible for observed optical limiting and thresholding behaviors.
    • The findings have implications for designing nonlinear optical devices.