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

Shu, Xuewen, Sugden, Kate and Bennion, Ian (2008). Apodisation of photo-induced waveguide gratings using double-exposure with complementary duty cycles. Optics express, 16 (3), pp. 2221-2225.

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.

Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences
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
Published Date: 2008-02-04
Authors: Shu, Xuewen
Sugden, Kate
Bennion, Ian

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