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Related Experiment Videos

Incoupling waveguide holograms for simultaneous focusing into multiple arbitrary positions.

J Backlund1, J Bengtsson, C F Carlström

  • 1Photonics Laboratory, Department of Microelectronics, Chalmers University of Technology, SE-41296 Göteborg, Sweden. johan@elm.chalmers.se

Applied Optics
|March 8, 2008
PubMed
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Researchers developed a new design method for incoupling waveguide holograms (IWGHs). These novel holographic grating couplers can simultaneously focus light into specific waveguide positions, enabling advanced optical functionalities.

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Grating couplers, or IWGHs, are essential for coupling light into waveguides.
  • Existing IWGHs primarily focus on light incoupling, with limited capabilities for simultaneous manipulation.
  • Phase modulation of incoupled light offers potential for advanced optical functions.

Purpose of the Study:

  • To present a novel design method for incoupling waveguide holograms (IWGHs).
  • To enable IWGHs that simultaneously focus incoupled light to desired positions within a waveguide.
  • To demonstrate the capability of IWGHs for beam splitting and focusing functions.

Main Methods:

  • Development of a new design algorithm based on a simplified model relating incident light waves to locally excited guided waves.

Related Experiment Videos

  • Formulation of an efficient optimization problem for IWGH design.
  • Fabrication of four distinct IWGHs in Indium Phosphide (InP) for 1550-nm wavelength light.

    • Main Results:

    • Successful design and fabrication of novel IWGHs.
    • Experimental confirmation of efficient light incoupling into the waveguide.
    • Demonstration of simultaneous splitting and focusing of guided light into multiple positions.

    Conclusions:

    • The presented design method enables the creation of versatile IWGHs with simultaneous focusing capabilities.
    • These novel IWGHs offer enhanced control over light manipulation within waveguides.
    • The technology holds promise for advanced integrated photonic devices and applications.