Open AccessFocusing of partially coherent light into planar waveguides
Author(s) -
Toni Saastamoinen,
Markku Kuittinen,
Pasi Vahimaa,
Jari Turunen,
Jani Tervo
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.004511
Subject(s) - optics , planar , waveguide , superposition principle , diffraction , physics , coupling (piping) , multi mode optical fiber , refractive index , gaussian , materials science , optical fiber , computer graphics (images) , quantum mechanics , computer science , metallurgy
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.