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Related Experiment Videos

Efficient coupling into polymer waveguides by gratings.

R Waldhäusl1, B Schnabel, P Dannberg

  • 1Fraunhofer-Institute for Applied Optics and Precision Engineering, Schillerstrasse 1, D-07745 Jena, Germany.

Applied Optics
|February 12, 2008
PubMed
Summary
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Highly efficient grating couplers for polymer waveguides were fabricated using electron-beam lithography, achieving up to 67% input efficiency. This technology enables all-polymeric optical chips with improved light coupling and focusing properties.

Area of Science:

  • Photonics
  • Materials Science
  • Nanofabrication

Background:

  • Grating couplers are essential for integrating light into optical waveguides.
  • Polymer-based optical devices offer advantages in cost and flexibility.
  • Efficient light coupling remains a challenge in polymer photonics.

Purpose of the Study:

  • To investigate and demonstrate highly efficient grating couplers for polymer waveguides.
  • To explore fabrication techniques for polymer-based optical chips.
  • To optimize grating coupler designs for improved light manipulation.

Main Methods:

  • Electron-beam lithography for high-resolution grating fabrication.
  • Embossing technique for replicating gratings into polymer substrates.

Related Experiment Videos

  • Design and characterization of blazed and variable grating depth couplers.

    • Main Results:

    • Achieved a maximum input coupling efficiency of 67% for polymer slab waveguides.
    • Demonstrated an all-polymeric optical chip incorporating efficient grating couplers.
    • Reported a focusing blazed grating with 42% efficiency into a polymer strip waveguide.
    • Investigated curvature correction for enhanced focusing properties.

    Conclusions:

    • Electron-beam lithography and embossing enable efficient polymer grating couplers.
    • Optimized grating designs, including blazed profiles, improve light coupling and focusing.
    • This work paves the way for advanced all-polymeric photonic integrated circuits.