Compact optical amplifier

摘要

The optical amplifier has a waveguide including a core and a cladding. The cladding at least partially surrounds the core and is doped with at least one species of rare earth ion in the range of 5 to 75 wt %. In another embodiment, the core is doped with Er³⁺ in the range of 7 to 9 wt % and with Yb³⁺ in the range of 11 to 13 wt %.