High bandwidth optical waveguide

Details High bandwidth optical waveguide High bandwidth optical waveguide

G - Physics

02

B

49/8, 88/97.2

G02B 6/036 (2006.01) C03C 13/04 (2006.01)

Patent

CA 1151456

Abstract of the Disclosure An optical waveguide filament comprising a cladding layer, a core and a barrier layer disposed between the core and cladding. The barrier layer comprises silica doped with B2O3, P2O5 and GeO2. The core consists of an inner region and an outer region, the boundary between which is referred to as the core break-point. In the outer region of the core, the concentration of B2O3 de- creases linearly from its barrier layer level to zero at the core break-point, the P2O5 increases at a rapid rate from the barrier layer level to a first concentration level at the core break-point and the GeO2 remains at a constant value between zero and the barrier level. In the outer region of the. core, the GeO2 increases from some level up to the barrier layer level to a greater value at the filament axis in a power law fashion. The P2O5 also increases in a power law fashion from the value thereof at the core break-point to a higher value at the filament axis, the increase in concentration of P2O5 in the outer core region increasing at a rate greater than the concentration of P2O5 would increase if the power law P2O5 gradient extended into the outer core region.

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