| 摘要 |
<p>An active optical device comprises a glass, waveguiding structure (20,30,40,50) disposed on a substantially planar principal surface of a substrate (10). The structure includes a silica-based, erbium-doped active core (40). The active core has an erbium-to-silicon atomic ratio of at least about 0.01, an absolute erbium concentration of at least about 1.4x10<2><0> atoms per cubic centimeter, and a radiative lifetime of the erbium lasing level of at least about 7 milliseconds. Also disclosed is a method for forming an active optical device, including the step of depositing an erbium-doped active core by sputtering. <IMAGE></p> |
