Abstract
We design and demonstrate the novel silicon optical polarization rotators (PRs) based on the mode conversions inside the waveguide. The mode converters are realized by the mode hybridization of the tapered rib waveguides. The mode converters based on the beam shaping method are followed to complete the PRs function. By using the , , and mode as the transitional mode, the fabricated PRs show the insert losses of less than 0.4, 0.5, and 1 dB, respectively. The corresponding polarization extinction ratios of larger than 21, 18, and 23 dB, over a wavelength range of 100 nm.
© 2016 Optical Society of America
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