Focusing of partially coherent light into planar waveguides

Edge coupling of a focused partially coherent Gaussian Schell-model beam into a planar dielectric waveguide is examined. The incident field is decomposed into a sum of coherent modes that are expressed as a discrete superposition of plane-wave components. A model based on the rigorous diffraction th...

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Bibliographic Details
Published in:Optics express 2004-09, Vol.12 (19), p.4511-4522
Main Authors: Saastamoinen, Toni, Kuittinen, Markku, Vahimaa, Pasi, Turunen, Jari, Tervo, Jani
Format: Article
Language:English
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Summary:Edge coupling of a focused partially coherent Gaussian Schell-model beam into a planar dielectric waveguide is examined. The incident field is decomposed into a sum of coherent modes that are expressed as a discrete superposition of plane-wave components. A model based on the rigorous diffraction theory of gratings is used to replace the waveguide with a corresponding periodic multilayer structure to determine the coupling efficiencies. Numerical simulations are presented for single and multimode planar waveguides and for a graded index waveguide. The results are compared with the predictions of the overlap integral method.
ISSN:1094-4087
1094-4087
DOI:10.1364/OPEX.12.004511