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Updated: Jun 20, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

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Published on: November 30, 2012

Polymer parallel optical waveguide with graded-index rectangular cores and its dispersion analysis.

Tomoya Kosugi1, Takaaki Ishigure

  • 1Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. ishigure@appi.keio.ac.jp

Optics Express
|September 3, 2009
PubMed
Summary

We developed a low-loss polymer optical waveguide with graded-index rectangular cores for high-speed optical interconnections. This novel design shows properties similar to circular core waveguides, enabling denser and faster data transmission.

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Photonics

Background:

  • High-speed and high-density optical interconnections are crucial for modern computing and communication systems.
  • Graded-index (GI) optical waveguides, traditionally with circular cores, offer superior modal dispersion properties for signal integrity.
  • The development of novel waveguide structures is needed to enhance bandwidth and reduce losses in optical interconnects.

Purpose of the Study:

  • To fabricate and characterize a novel polymer parallel optical waveguide utilizing graded-index (GI) rectangular cores.
  • To investigate the modal dispersion properties of these GI rectangular core waveguides.
  • To assess the potential of this waveguide technology for high-speed and high-density optical interconnections.

Main Methods:

  • Fabrication of GI rectangular cores using the preform method.
  • Experimental measurement and analysis of modal dispersion in the fabricated polymer waveguides.
  • Comparison of performance characteristics with previously reported GI circular core waveguides.

Main Results:

  • Successful fabrication of a low-loss, high-bandwidth polymer parallel optical waveguide with GI rectangular cores.
  • Demonstration of a near-parabolic index profile in the rectangular cores, yielding properties comparable to GI circular cores.
  • Detailed experimental results on modal dispersion characteristics of the GI rectangular core waveguides.

Conclusions:

  • The developed GI rectangular core polymer waveguide exhibits excellent optical properties suitable for advanced optical interconnects.
  • The rectangular core design offers a viable alternative to circular cores, potentially enabling higher density integration.
  • Feasibility of using conventional photolithography and imprinting processes for mass production and integration onto printed circuit boards.