Silica based optical fiber waveguide using phosphorus pentoxide

Details Silica based optical fiber waveguide using phosphorus pentoxide Silica based optical fiber waveguide using phosphorus pentoxide

1976-10-12

1978-09-05

Corbin, John K.

350 9634, G02B 514

Patent

active

041115252

ABSTRACT:
An optical fiber waveguide is disclosed wherein germanium dioxide (GeO.sub.2) and phosphorus pentoxide (P.sub.2 O.sub.5) are radially graded in the core of the optical fiber for the purpose of achieving minimum modal dispersion over a broad range of wavelengths. The phosphorus pentoxide has its maximum concentration on the axis of the fiber core and is graded to zero concentration at the core-cladding interface. The germanium dioxide has its maximum concentration at the core-cladding interface, is constant throughout the cladding and is graded to zero concentration on the axis of the fiber core. The ratio of maximum P.sub.2 O.sub.5 to maximum GeO.sub.2 is approximately 11.6 and therefore the numerical aperture is only slightly degraded as a result of the reverse doping of germanium dioxide.

REFERENCES:
patent: 4009014 (1977-02-01), Black et al.
patent: 4025156 (1977-05-01), Gloge et al.
patent: 4033667 (1977-07-01), Fleming, Jr.
patent: 4057320 (1977-11-01), Marcatili

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