MODIFICATION OF INTERNALLY CLAD SAPPHIRE FIBER TO ATTENUATE CLADDING MODES AT HIGH TEMPERATURES

摘要

A sapphire optical waveguide includes a sapphire core, at least one layer of internal cladding within the sapphire optical waveguide, and a mode stripping material, structure, or geometry that reduces a power of light traveling in the internal cladding at high temperatures. The mode stripping material, structure, or geometry strips higher order modes so that the low order modes of light are propagated along the waveguide. Methods for making a sapphire optical waveguide with various mode stripping materials, structures, or geometries are described.