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Optically controlled Fabry-Perot interferometer using a liquid crystal light valve.

D B Taber, J A Davis, L A Holloway

    Applied Optics
    |June 23, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an optically controlled Fabry-Perot interferometer using a liquid crystal light valve (LCLV). The LCLV modulates light polarization, enabling tunable optical device performance for applications in optical computing.

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    Area of Science:

    • Optics and Photonics
    • Liquid Crystal Devices
    • Interferometry

    Background:

    • Fabry-Perot interferometers are crucial optical resonators.
    • Liquid Crystal Light Valves (LCLVs) offer optical control capabilities.
    • Integrating LCLVs into interferometers can enable tunable optical systems.

    Purpose of the Study:

    • To develop and characterize an optically controlled Fabry-Perot interferometer.
    • To investigate the modulation of interferometer finesse via LCLV-induced polarization rotation.
    • To explore the potential of this device in optical computing and neural networks.

    Main Methods:

    • Constructed a Fabry-Perot interferometer using a polarizing cube beam-splitter and a liquid crystal light valve (LCLV).
    • Utilized the LCLV to rotate the plane of polarization of incident light, controlled by an external write beam intensity.
    • Examined the dependence of the interferometer's finesse on the LCLV's polarization rotation angle.

    Main Results:

    • The finesse of the Fabry-Perot interferometer showed sharp variations with the LCLV's polarization rotation angle.
    • The polarization rotation angle was found to be dependent on write beam intensity, applied voltage frequency, bias voltage, and LCLV orientation.
    • Experimental results using a He-Ne laser closely matched theoretical predictions.

    Conclusions:

    • An optically controllable Fabry-Perot interferometer based on LCLV-modulated polarization has been successfully demonstrated.
    • The device exhibits tunable finesse, offering a novel approach for optical modulation.
    • This technology holds promise for applications in optical computing and optical neural networks.