Planar gradient-index glass waveguides with nearly circular cross sections have been fabricated by the ion migration method. A low-loss branched circuit and star coupler are demonstrated.
© 1984 Optical Society of America
Original Manuscript: October 31, 1983
Published: June 1, 1984
Eiji Okuda, Ichiro Tanaka, and Tetsuya Yamasaki, "Planar gradient-index glass waveguide and its applications to a 4-port branched circuit and star coupler," Appl. Opt. 23, 1745-1748 (1984)