Polarization-insensitive wavelength filters by birefringence compensation of vertical couplers

We demonstrate a novel birefringence compensation technique to reduce the polarization dependence of AlGaAs directional coupler wavelength filters operating in the 770 to 970 nm wavelength range. By using a multiple quantum well structure to compensate intrinsic waveguide birefringence, we fabricate...

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Bibliographic Details
Published in:Applied physics letters 1996-02, Vol.68 (8), p.1037-1039
Main Authors: Deri, R. J., Emanuel, M. A., Patterson, F. G., Dijaili, S. P., Nguyen, L. T.
Format: Article
Language:English
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Summary:We demonstrate a novel birefringence compensation technique to reduce the polarization dependence of AlGaAs directional coupler wavelength filters operating in the 770 to 970 nm wavelength range. By using a multiple quantum well structure to compensate intrinsic waveguide birefringence, we fabricated vertical coupler filters with polarization-dependent wavelength shifts from 0.1 to 2 nm, significantly less than those achieved for conventional devices. Experimental results show that both the filter wavelength and insertion loss can be rendered polarization insensitive by this technique.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.116240