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Polarization-independent optical directional coupler based on slot waveguides Export

by: Takeshi Fujisawa, Masanori Koshiba
Optics Letters, Vol. 31, No. 1. (2006), pp. 56-58.

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polarization-conversion slot-waveguides

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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. ©2006 Optical Society of America


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