Apodisation of photo-induced waveguide gratings using double-exposure with complementary duty cycles


We present a novel apodisation scheme for photo-induced waveguide gratings. The apodisation is implemented with double exposures that have reversely varying duty cycles. We have successfully applied the proposed scheme to remove the sidelobes of long period gratings (LPGs). We also observed for the first time super strong sidelobes in LPGs when creating them with only a single varying-duty-cycle exposure. The strong sidelobes can be well explained with a Mach-Zehnder interference model.

Publication DOI: https://doi.org/10.1364/OE.16.002221
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: © 2008 Optical Society of America
Uncontrolled Keywords: apodisation scheme,photo-induced waveguide gratings,double exposures,reversely varying duty cycles,Atomic and Molecular Physics, and Optics
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://www.opti ... RI=oe-16-3-2221 (Publisher URL)
PURE Output Type: Article
Published Date: 2008-02-04
Authors: Shu, Xuewen
Sugden, Kate ( 0000-0001-6323-1082)
Bennion, Ian



Version: Published Version

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