High bandwidth optical waveguide

Details High bandwidth optical waveguide High bandwidth optical waveguide

1980-02-01

1982-07-13

Lee, John D.

65 312, 350 9634, G02B 5172

Patent

active

043391745

ABSTRACT:
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 B.sub.2 O.sub.3, P.sub.2 O.sub.5 and GeO.sub.2. 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 B.sub.2 O.sub.3 decreases linearly from its barrier layer level to zero at the core break-point, the P.sub.2 O.sub.5 increases at a rapid rate from the barrier layer level to a first concentration level at the core break-point and the GeO.sub.2 remains at a constant value between zero and the barrier level. In the outer region of the core, the GeO.sub.2 increases from some level up to the barrier layer level to a greater value at the filament axis in a power law fashion. The P.sub.2 O.sub.5 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 P.sub.2 O.sub.5 in the outer core region increasing at a rate greater than the concentration of P.sub.2 O.sub.5 would increase if the power law P.sub.2 O.sub.5 gradient extended into the outer core region.

REFERENCES:
patent: 4057320 (1977-11-01), Marcatili
patent: 4106850 (1978-08-01), Marcatili
patent: 4111525 (1978-09-01), Kaminow et al.
patent: 4229070 (1980-10-01), Olshansky et al.
patent: 4230396 (1980-10-01), Olshansky et al.

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