Polarization-independent optical directional coupler based on slot waveguides
- 1 January 2006
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 31 (1), 56-58
- https://doi.org/10.1364/ol.31.000056
Abstract
A polarization-independent optical directional coupler based on slot waveguides is proposed and analyzed by using rigorous full-vectorial analysis methods based on a finite-element scheme. Properly choosing materials and structural parameters makes the coupling length for quasi-TE modes become equal to that for quasi-TM modes. Tolerances to operating wavelength and structural parameters are also discussed. The proposed coupler can be used for highly integrated optical circuits without polarization diversity schemes.Keywords
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