Title :
Coupling Efficiency of Gaussian Beams Into Step-Index Waveguides—An Improved Ray-Optical Approach
Author :
Stallein, Matthias
Author_Institution :
Dept. of Electr. & Comput. Eng., Paderborn Univ., Paderborn
Abstract :
The coupling efficiency of Gaussian beams into multimodal waveguides is calculated with the intention of validating ray-optical approaches, that can be used for a simulation tool for optical interconnections. A full-wave analysis using the mode matching technique serves as reference method. Therefore, waveguides with known mode spectra, the circular fiber, and the planar slab waveguide, have been considered. Detailed results especially for the fiber are presented for different geometry and material parameters and varying parameters of the incident Gaussian beam. It is shown that a ray-optical approach regarding a simplified Goos-Haenchen Shift gives accurate results.
Keywords :
integrated optoelectronics; laser beams; optical interconnections; optical planar waveguides; optical waveguide theory; circular fiber; full-wave analysis; incident Gaussian beams coupling efficiency; mode matching technique; multimodal waveguides; optical interconnections; planar slab waveguide; printed circuit boards; ray-optical approach; simplified Goos-Haenchen Shift; step-index waveguides; Geometrical optics; Optical coupling; Optical fiber communication; Optical fibers; Optical interconnections; Optical planar waveguides; Optical waveguides; Planar waveguides; Slabs; Vertical cavity surface emitting lasers; Gaussian beams; geometrical optics; optical communication; optical fiber coupling; optical interconnections; optical waveguides;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2007.914526
