Abstract

90<sup>o</sup>bent hollow waveguides with distributed Bragg reflectors on silicon substrate are proposed. The air core was embedded by Si<sup>3</sup>N<sup>4</sup>/SiO<sup>2</sup>multilayer. The lowest 90<sup>o</sup>bending loss is around 0.8dB.

© 2009 Optical Society of America

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