Ybの同時ドープによるEr導波路光増幅器の利得改善

抄録

In this letter, Er-doped LiNbO₃ waveguide-typed light amplifiers made with Yb co-dope technique are investigated from the point of view of gain improvement. The Ti-diffused waveguide light amplifiers are fabricated in Er/Yb co-doped LiNbO₃ substrate, and benefits of Yb co-doping are provided by comparing with the conventional Er-single doping in gain measurement. It is also shown experimentally that the high-index clad-loaded waveguide configuration is more advantageous in the gain improvement than the conventional non-clad waveguide.