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

Abstract

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: College of Engineering & Physical Sciences > School of Informatics and Digital Engineering > Electrical and Electronic Engineering
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
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
Publication ISSN: 1094-4087
Full Text Link:
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 (ORCID Profile 0000-0001-6323-1082)
Bennion, Ian

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