Influence of the Cross Sectional Shape of Board-integrated Optical Waveguides on the Propagation Characteristics

Abstract

The influence of the cross s ectional shape of highly multimode optical step-index waveguides on the attenuation is analyzed by an advanced ray tracing method, which is able to take mode coupling and additional losses due to surface roughness into account. Straight waveguides with trapezoidal crosssections, characterized by different tilt angles are investigated and their static propagation characteristic is compared to that of a waveguide with a rectangular cross-section.