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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 5 — Mar. 5, 2007
  • pp: 2008–2018

A double-sided grating coupler for thin light guides

Samuli Siitonen, Pasi Laakkonen, Jani Tervo, and Markku Kuittinen  »View Author Affiliations

Optics Express, Vol. 15, Issue 5, pp. 2008-2018 (2007)

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A simple and efficient solution for coupling a collimated light beam into a thin light guide is presented. The approach is based on two gratings, with their grating lines perpendicular to each other, fabricated into the opposite surfaces of the light guide. The presented numerical simulation shows that an optimized double-sided solution for unpolarized light enables around 2–7 times higher incoupling efficiencies than what is possible with conventional solution based on only one grating. Experimental verification is made by using UV-replicated binary gratings on both sides of a PMMA foil.

© 2007 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(230.7400) Optical devices : Waveguides, slab

ToC Category:
Diffraction and Gratings

Original Manuscript: December 12, 2006
Revised Manuscript: January 24, 2007
Manuscript Accepted: January 29, 2007
Published: March 5, 2007

Samuli Siitonen, Pasi Laakkonen, Jani Tervo, and Markku Kuittinen, "A double-sided grating coupler for thin light guides," Opt. Express 15, 2008-2018 (2007)

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