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Published March 10, 2014 | Published
Journal Article Open

Design and characterization of whispering-gallery spiral waveguides

Abstract

Whispering gallery delay lines have demonstrated record propagation length on a silicon chip and can provide a way to transfer certain applications of optical fiber to wafer-based systems. Their design and fabrication requires careful control of waveguide curvature and etching conditions to minimize connection losses between elements of the delay line. Moreover, loss characterization based on optical backscatter requires normalization to account for the impact of curvature on backscatter rate. In this paper we provide details on design of Archimedean whispering-gallery spiral waveguides, their coupling into cascaded structures, as well as optical loss characterization by optical backscatter reflectometry.

Additional Information

© 2014 Optical Society of America. Received 5 Nov 2013; revised 27 Jan 2014; accepted 10 Feb 2014; published 27 Feb 2014. We gratefully acknowledge the Defense Advanced Research Projects Agency under the iPhoD program, the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation, and also the Kavli Nanoscience Institute at Caltech. H. L. thanks the Center for the Physics of Information.

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August 19, 2023
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