Silica waveguide structure

Details Silica waveguide structure Silica waveguide structure

G - Physics

02

B

G02B 6/12 (2006.01) G02B 6/125 (2006.01) G02B 6/132 (2006.01)

Patent

CA 2129237

A three-dimensional waveguide has path regions which share a common confining region, preferably of uniform refractive index. The path regions are located at two or more levels. The structure is implemented in silica with distributed dopants to distin- guish path regions from the confining region. The structure is made using flame hydrolysis to deposit layers. Melting point de- pressants are incorporated so that later deposited layers can be melted without melting the whole structure. Some layers of pure silica can be deposited by chemical vapour deposition. These layers are never melted and they provide a stabilising skeleton when complicated structures are melted.

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