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Coupling loss minimization of slow light slotted photonic crystal waveguides using mode matching with continuous group index perturbation

TitleCoupling loss minimization of slow light slotted photonic crystal waveguides using mode matching with continuous group index perturbation
Publication TypeJournal Article
Year of Publication2012
AuthorsLin, C-Y., A. X. Wang, W-C. Lai, J. L. Covey, S. Chakravarty, and R. T. Chen
JournalOptics Letters
Volume37
Issue2
Pagination232
Date Published01/2012
ISSN1539-4794
Abstract

We experimentally demonstrate highly efficient coupling into a slow light slotted photonic crystal waveguide. With optical mode converters and group index tapers that provide good optical mode matching and impedance matching, a nearly flat transmission over the entire guided mode spectrum of 68.8 nm range with 2.4 dB minimum insertion loss is demonstrated. Measurements also show up to 20 dB baseline enhancement and 30 dB enhancement in the slow light region, indicating that it is possible to design highly efficient and compact devices that benefit from the slow light enhancement without increasing the coupling loss.

DOI10.1364/OL.37.000232
Short TitleOpt. Lett.