Abstract

The use of guided-wave optical devices will depend on how well they can be coupled to optical fibers. There are many works about coupling efficiences between optical fibers and waveguides which also evaluate waveguide transmission losses [1,2]. The aim of this work is to evaluate the coupling efficiency between a step-index single-mode fiber and a planar single-mode GRIN waveguide by butt-joining. In this way the coupling efficiency between a step-index single-mode fiber of 4μ core diameter and three single-mode planar ion-exchanged waveguides fabricated in this laboratory has been calculated and measured as well as the waveguide transmission losses. The results agree with the theoretical calculations.

© 1994 Optical Society of America