Method of fabricating monomode active strip optical...

Details Method of fabricating monomode active strip optical... Method of fabricating monomode active strip optical...

C - Chemistry, Metallurgy

03

C

C03C 17/02 (2006.01) C03B 19/14 (2006.01) C03B 37/018 (2006.01) C03C 23/00 (2006.01)

Patent

CA 2080527

In order to fabricate monomode active strip optical waveguides for optical telecommunications, a layer of vitreous soot is deposited on a substrate and is impregnated with a solution of a precursor of a rare-earth dopant, and radiation with a wavelength in an absorption band of the dopant is focused on the soot, and moved along a trajectory corresponding to the configuration desired for the guide, thereby forming a vitrified strip. The soot may be pre-doped with a refractive index raising dopant, or a precursor of such a dopant may be included in the solution. The substrate may be of a polygonal tubular cross-section, and the soot deposited on an inside surface. This enables several waveguides to be formed at once, and protects the soot layer from contamination.

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