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Electrooptic diffraction modulation in Ti-diffused LiTaO(3).

G L Tangonan, D L Persechini, J F Lotspeich

    Applied Optics
    |March 6, 2010
    PubMed
    Summary
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    Researchers designed electro-optic Bragg diffraction modulators using titanium-diffused lithium tantalate waveguides. These modulators achieve 98% deflection efficiency and high extinction ratios for visible and near-infrared light.

    Area of Science:

    • Photonics and optical engineering
    • Materials science

    Background:

    • Electro-optic modulators are crucial components in optical communication and signal processing.
    • Titanium-diffused lithium tantalate (LiTaO3) is a well-established material for integrated optics due to its electro-optic properties.

    Purpose of the Study:

    • To report the design and fabrication of novel electro-optic Bragg diffraction modulators.
    • To evaluate the performance of these modulators in terms of deflection efficiency and extinction ratio.

    Main Methods:

    • Fabrication of modulators using titanium-diffusion in LiTaO3 substrates.
    • Characterization of modulator performance for visible and near-infrared wavelengths.

    Main Results:

    • Achieved 98% deflection efficiency for both deflected (m=1) and non-deflected (m=0) beams.

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  • Demonstrated extinction ratios of at least 250:1.
  • Operation confirmed for visible and near-infrared spectra.

    • Conclusions:

    • The developed electro-optic Bragg diffraction modulators exhibit high performance.
    • Ti-diffused LiTaO3 waveguides are suitable for efficient modulator fabrication.