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Proceedings Paper

Ultra-low loss and compact coplanar waveguide crossing
Author(s): Amir Hosseini; Yang Zhang; Ray T. Chen
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Paper Abstract

We investigate the loss mechanism in 3-moded multimode-interference couplers that are the building blocks of a compact and low-loss waveguide crossing structure. Broadband silicon waveguide crossing arrays with <0.01dB insertion loss per crossing are proposed using cascaded multimode interference couplers, where lateral subwavelength nanostructures are used to reduce the insertions loss. We design and fabricate a 101×101 waveguide crossing array with a pitch of 3.08μm. Insertion loss of ~0.02dB per crossing and crosstalk <-40dB at 1550nm operating wavelength and broad transmission spectrum ranging from 1520 to 1610nm are experimentally demonstrated.

Paper Details

Date Published: 8 March 2014
PDF: 5 pages
Proc. SPIE 8991, Optical Interconnects XIV, 89910X (8 March 2014); doi: 10.1117/12.2044227
Show Author Affiliations
Amir Hosseini, Omega Optics, Inc. (United States)
Yang Zhang, The Univ. of Texas at Austin (United States)
Ray T. Chen, The Univ. of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 8991:
Optical Interconnects XIV
Henning Schröder; Ray T. Chen; Alexei L. Glebov, Editor(s)

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