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Experimental study of bent multimode optical waveguides.

Sami Musa1, Albert Borreman, Abgail A M Kok

  • 1Faculty of Applied Sciences, Optics Research Group, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands. s.musa@tnw.tudelft.nl

Applied Optics
|November 13, 2004
PubMed
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Bend losses in multimode waveguides were experimentally studied. A simple ray optics model accurately predicts these losses and shows they are independent of wavelength.

Area of Science:

  • Optics and Photonics
  • Waveguide Theory
  • Materials Science

Background:

  • Multimode waveguides are crucial components in optical systems.
  • Understanding signal loss in bent sections is essential for device design.
  • Existing models for bend loss may require validation for multimode scenarios.

Purpose of the Study:

  • To experimentally investigate bend losses in multimode waveguides.
  • To validate an analytical expression for predicting these losses.
  • To determine the wavelength dependence of bend-induced losses.

Main Methods:

  • Experimental measurement of signal attenuation in bent multimode waveguides.
  • Application of a ray optics-based analytical model.
  • Testing across different wavelengths to assess dependence.

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Main Results:

  • Experimental data confirms the accuracy of the proposed analytical expression for bend loss.
  • Bend losses in multimode waveguides were found to be independent of the optical wavelength.
  • The study provides a validated, simple method for loss prediction.

Conclusions:

  • The ray optics model effectively predicts bend losses in multimode waveguides.
  • Bend-induced losses in these waveguides do not vary with wavelength.
  • This finding simplifies the design and analysis of optical systems employing bent multimode waveguides.