COUPLING LOSSES BETWEEN STANDARD SINGLE-MADE FIBERS AND RECTANGULAR WAVEGUIDES FOR INTEGRATED OPTICS

摘要

The butt-coupling loss between different tapered rectangular waveguides and a standard single-mode optical fiber has been calculated. Losses as low as 0.16 dB can be reached for waveguides with a refractive-index contrast in the range of 0.5% to 1.96%. The fabrication tolerances are such that practical devices with coupling losses below 0.25 dB are feasible. [References: 13]