Method for creating codoped layers and fibers containing codoped layers

Abstract From the Canadian patent

A method of creating a codoped layer (18) includes creating a first layer (14) having a first dopant and at least one other layer (16) have another dopant then interdiffusing the dopant to create a substantially homogeneous codoped layer. More than one dopant may be deposited in a single layer. The creating conditions may be optimized for each layer (14 16). Further, when the , creation of a layer includes sequential deposition and consolidation conditions for each process may be optimized within the layer creation. While at least two layers (14, 16) are formed the interdiffusion substantially , eliminates any stratification or layer structure.