Novel compact polarization converters based on ultra short bends

A novel integrated polarization converter based on ultra short bends is presented, which has a potential for low loss and small device size. A conversion value of 85% was experimentally measured with excess loss of 2.7 dB and overall dimensions of 975×83 μm. Also 45% conversion was measured with extremely low excess loss of 0.4 dB for a device size of 760×86 μm.