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Related Concept Videos

Propagation of Waves01:07

Propagation of Waves

When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
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Characterization of Anisotropic Leaky Mode Modulators for Holovideo
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Published on: March 19, 2016

Diffuse nonlinearity with a thermal gradient in waveguide prism coupling.

M Bertolotti, F Michelotti, C Sibilia

    Applied Optics
    |August 20, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study numerically investigates prism coupling in a linear film on a nonlinear substrate. Thermal gradients in the linear film significantly affect coupling changes with input power during quasi-continuous operation.

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    Area of Science:

    • Optics and Photonics
    • Nonlinear Optics
    • Materials Science

    Background:

    • Prism coupling is a key technique for evanescently exciting guided modes in thin films.
    • Nonlinear optical substrates can modify light propagation characteristics based on incident power.
    • Understanding thermal effects is crucial for stable device operation in nonlinear optics.

    Purpose of the Study:

    • To numerically investigate prism coupling of radiation in a linear film over a nonlinear substrate.
    • To analyze the influence of thermal gradients on coupling efficiency as a function of input power.
    • To validate numerical calculations against experimental data.

    Main Methods:

    • Numerical simulation of prism coupling.
    • Modeling of thermal nonlinearity and gradient generation within the linear film.
    • Comparison of simulation results with experimental measurements.

    Main Results:

    • The change in prism coupling is dependent on input power.
    • A thermal gradient generated in the linear film influences the coupling behavior.
    • Numerical results show good agreement with experimental data, confirming the model's accuracy.

    Conclusions:

    • Thermal gradients play a significant role in prism coupling dynamics for nonlinear optical systems.
    • Numerical modeling provides a reliable approach for studying such phenomena.
    • The findings are relevant for the design and optimization of nonlinear optical devices.