Highly compact polarization-independent grating coupler.


We propose a compact polarization-independent output grating coupler, which consists of T-shaped grooves. For only 20 periods on a silicon-on-insulator wafer with a 260nm thick top silicon layer, the output coupling efficiencies for both the TE and the TM modes are larger than 50% in the wavelength range of 1480-1580nm and are approximately 58% around 1550nm. The polarization-dependent loss of the device is within 0.05dB in the range of 1510-1580nm.

DOI: 10.1364/OL.35.001834

Cite this paper

@article{Shao2010HighlyCP, title={Highly compact polarization-independent grating coupler.}, author={Shiqian Shao and Yi Wang}, journal={Optics letters}, year={2010}, volume={35 11}, pages={1834-6} }