Ideal bend contour trajectories for single-mode operation of low-loss overmoded waveguides

Publisher:
IEEE Publications
Publication Type:
Journal Article
Citation:
Photonics Technology Letters, IEEE, 2007, 19 (11), pp. 819 - 821
Issue Date:
2007-01
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Bend designs for single-mode operation of low-loss overmoded waveguides are presented. A class of contour trajectories for minimum radiation loss is derived analytically, and numerical optimization is used to find ideal trajectory parameters. Three-dimensional finite-difference time-domain simulations predict bend losses below 0.1 dB for 180deg-bends of overmoded silicon-on-insulator waveguides with a radius of R=1.5 mum. These findings are supported experimentally
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