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Related Concept Videos

Standing Waves in a Cavity01:28

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:

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Modal coupling in tilted-mirror waveguide lasers and amplifiers.

J Salzman, R J Hawkins, T P Lee

    Optics Letters
    |September 12, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Tilted-mirror facets in optical devices can cause intermode coupling, affecting laser and amplifier performance. This study models the impact of this coupling on cavity modes and device design.

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    Area of Science:

    • Optics and Photonics
    • Semiconductor Device Physics

    Background:

    • Antireflection coatings are standard for low facet reflectivity in waveguide structures.
    • Tilted-mirror facets offer an alternative design approach for controlling facet reflectivity.

    Purpose of the Study:

    • To investigate the impact of tilted-mirror facets on intermode coupling in semiconductor lasers and optical amplifiers.
    • To model the effect of tilt-induced intermode coupling on cavity modes.
    • To provide design insights for integrated-optical devices utilizing tilted-mirror facets.

    Main Methods:

    • Development of a simplified model to describe tilt-induced intermode coupling.
    • Analysis of the effect of this coupling on cavity modes.
    • Simulation and theoretical analysis of semiconductor laser and optical amplifier behavior.

    Main Results:

    • Tilted-mirror facets with finite reflectivity can induce significant intermode coupling.
    • Intermode coupling affects the characteristics of cavity modes in waveguide structures.
    • The degree of coupling is dependent on the tilt angle and facet reflectivity.

    Conclusions:

    • Tilted-mirror facets are not solely passive elements and can introduce active coupling effects.
    • Understanding intermode coupling is crucial for optimizing the design of tilted-mirror integrated-optical lasers and amplifiers.
    • This research highlights potential design trade-offs when using tilted-mirror facets.