Abstract
We present an ultracompact (15.3 μm long) and high-efficiency silicon-on-insulator polarization rotator designed for polarization-diversified circuits. The rotator is comprised of a bilevel-tapered -to- mode converter and a novel bent-tapered -to- mode converter. The rotator has a simulated polarization conversion loss lower than 0.2 dB and a polarization-extinction ratio larger than 25 dB over a wavelength range of 80 nm around 1550 nm. The rotator has a top-cladding and can be fabricated in a CMOS-compatible process.
© 2014 Optical Society of America
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