| 摘要 |
<p>An optical waveguide device having a folded waveguide structure on a semiconductor substrate (7). The optical waveguide device includes first (1) and second (2) single mode optical waveguides formed on a semiconductor substrate. The first and second optical waveguides merge together into a merging optical waveguide (8). A reflector (6) is positioned so that light travelling through the first optical waveguide into the merging optical waveguide is reflected by the reflector to travel through the second optical waveguide. The maximum complementary angle for total internal reflection for the light traveling through the first optical waveguide is &thetas;c, and the branch angle &thetas;b of the first and second optical waveguides is less than or equal to 0.55&thetas;c. <IMAGE></p> |
