Abstract

We present the design, fabrication, and operation of a polarization converter based on angled waveguides in the $\mathrm{InP}∕\mathrm{InGaAsP}$ material system. By combining design elements from mode evolution and birefringent devices, the total device length is kept short (less than $50\mathrm{\mu }\mathrm{m}$) and the insertion efficiency high at $81\%\pm 19\%$, which corresponds to an insertion loss of $1\mathrm{dB}$. Devices operate broadband, i.e., the polarization conversion exceeds $15\mathrm{dB}$ over a $100\mathrm{nm}$ wavelength range. A polarization rotator with these specifications is a prime candidate for use in an integrated polarization diversity scheme.

© 2007 Optical Society of America

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