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Polarization-based tunable interferometric filter.

E M Frins, W Dultz

    Applied Optics
    |February 21, 2008
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a tunable interferometric filter controlled by birefringence and geometric phase. The filter demonstrates theoretical and experimental chromatic dispersion compensation for tunable optical filtering applications.

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    Area of Science:

    • Optics and Photonics
    • Interferometry
    • Geometric Phase Optics

    Background:

    • Interferometric filters are crucial for spectral selection.
    • Controlling filter characteristics like chromatic dispersion is a significant challenge.
    • Geometric phase, specifically the Pancharatnam phase, offers novel control mechanisms.

    Purpose of the Study:

    • To describe a polarization-based tunable interferometric filter.
    • To analyze the filter's transmission characteristics using the Pancharatnam phase.
    • To demonstrate theoretical and experimental chromatic dispersion compensation.

    Main Methods:

    • Utilizing a two-beam interferometer with birefringence elements.
    • Applying the concept of geometric phase (Pancharatnam phase) for analysis.

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  • Controlling transmission via element thickness, optical path difference, and analyzer orientation.

    • Main Results:

    • Transmission characteristics are tunable through three key parameters.
    • Theoretical demonstration of chromatic dispersion compensation within a specific spectral range.
    • Experimental validation of the filter's properties.

    Conclusions:

    • The described polarization-based filter offers tunable spectral control.
    • Geometric phase provides an effective framework for analyzing and designing such filters.
    • The device shows potential for applications requiring chromatic dispersion compensation.