Article

Applied Physics B

, Volume 73, Issue 5, pp 613-618

First online:

Design of optical polarization splitters in a single-section deeply etched MMI waveguide

  • B.M.A. RahmanAffiliated withCity University, Department of Electrical Electronic and Information Engineering, Northampton Square, London EC1V 0HB, UK
  • , N. SomasiriAffiliated withCity University, Department of Electrical Electronic and Information Engineering, Northampton Square, London EC1V 0HB, UK
  • , C. ThemistosAffiliated withCity University, Department of Electrical Electronic and Information Engineering, Northampton Square, London EC1V 0HB, UK
  • , K.T.V. GrattanAffiliated withCity University, Department of Electrical Electronic and Information Engineering, Northampton Square, London EC1V 0HB, UK

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Abstract

The design of a single-section polarization splitter in a deeply etched semiconductor MMI waveguide is presented. Numerically simulated results indicate that the semiconductor MMI exhibits considerable polarization dependence and, utilizing this effect, a compact 1.6-mm-long polarization splitter may be fabricated to yield more than 8-dB polarization separation and only 0.11-dB optical loss, using a very simple design-approach.

PACS: 42.25.Ja; 42.82.Bq; 85.60.Bt; 42.82.Et; 42.79.Gu