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Intracavity transmission ellipsometry for optically anisotropic components.

W Holzapfel, S Neuschaefer-Rube, U Neuschaefer-Rube

    Applied Optics
    |September 22, 2010
    PubMed
    Summary

    Intracavity ellipsometry precisely measures optical component properties like retardation and orientation. This technique, using a phase-modulated laser, shows feasibility for analyzing optically anisotropic materials.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Materials Science

    Background:

    • Traditional ellipsometry methods can be complex and time-consuming.
    • Accurate characterization of optical components is crucial for various applications.
    • Optical anisotropy affects light propagation and polarization.

    Purpose of the Study:

    • To introduce and validate intracavity ellipsometry for optical component characterization.
    • To demonstrate the feasibility and precision of measuring relative retardation (Δ) and main axis orientation (φ).
    • To explore the potential for measuring polarization-dependent loss angle (Ψ) and rotation angles (ρ).

    Main Methods:

    • Placing the optical component within a phase-modulated continuous-wave (cw) laser cavity.
    • Monitoring changes in beat frequency, beam polarization, and intensity.
    • Utilizing a diode-pumped Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) laser ellipsometer.

    Main Results:

    • Preliminary measurements successfully determined relative retardation (Δ) and main axis orientation (φ).
    • Demonstrated the feasibility and precision of the intracavity ellipsometry technique.
    • Indicated the potential for comprehensive characterization of optical properties.

    Conclusions:

    • Intracavity ellipsometry offers a precise and feasible method for measuring optical component parameters.
    • The technique is particularly promising for analyzing optically anisotropic components.
    • Further development could extend its capability to measure additional polarization-dependent properties.