Abstract

We present compact crossings for silicon-on-insulator photonic wires. The waveguides are broadened using a 3μm parabolic taper in each arm. By locally applying a lower index contrast using a double-etch technique, loss of confinement is reduced and 97.5% transmission (1.7dB) is achieved with only 40dB cross talk.

© 2007 Optical Society of America

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