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Radiatively coupled waveguide polarization splitter simulated by wave-matching-based coupled mode theory

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Abstract

Coupled mode theory is applied to an arrangement of three raised strip waveguides with a multimode central strip. We use semivectorial numerically computed modes of the three single isolated waveguides as a basis for propagating supermode analysis of the entire structure. The pronounced polarization dependence of the raised strip guides allows for the design of a conveniently short polarization splitter. We discuss design guidelines and estimate the fabrication tolerances. The accuracy of the coupled mode approach is assessed by comparison with rigorously computed supermodes for comparable two waveguide couplers. Both types of structures indicate the limits in the applicability of the coupled mode model.

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Authors and Affiliations

  1. Department of Physics, University of Osnabrück, Barbarastraße 7, D-49069, Osnabrück, Germany (

    M. Lohmeyer, N. Bahlmann, O. Zhuromskyy & P. Hertel

Authors
  1. M. Lohmeyer
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  2. N. Bahlmann
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  3. O. Zhuromskyy
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  4. P. Hertel
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Lohmeyer, M., Bahlmann, N., Zhuromskyy, O. et al. Radiatively coupled waveguide polarization splitter simulated by wave-matching-based coupled mode theory. Optical and Quantum Electronics 31, 877–891 (1999). https://doi.org/10.1023/A:1006945721326

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  • DOI: https://doi.org/10.1023/A:1006945721326

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