Large bandwidth mode order converter by differential waveguides

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Oner B. B., ÜSTÜN K., Kurt H., Okyay A. K., Turhan-Sayan G.

OPTICS EXPRESS, vol.23, no.3, pp.3186-3195, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 3
  • Publication Date: 2015
  • Doi Number: 10.1364/oe.23.003186
  • Journal Name: OPTICS EXPRESS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3186-3195
  • Middle East Technical University Affiliated: Yes

Abstract

In this article, we propose a large bandwidth mode-order converter design by dielectric waveguides with equal lengths but different cross-sectional areas. The efficient conversion between even and odd modes is verified by inducing required phase difference between the equal length waveguides of different widths. Y-junctions are composed of both tapered mode splitter and combiner to connect mono-mode waveguide to multi-mode waveguide. The converted mode profiles at the output port show that the device operates successfully at designed wavelengths with wide bandwidth. This study provides a novel technique to implement compact mode order converters and direction selective/sensitive photonic structures. (C)2015 Optical Society of America