Article comprising silica-based glass containing aluminum and ph

Details Article comprising silica-based glass containing aluminum and ph Article comprising silica-based glass containing aluminum and ph

1988-02-08

1989-05-16

Sikes, William L.

350 9630, 65 312, G02B 600

Patent

active

048304638

ABSTRACT:
It has been discovered that fused silica doped with approximately equimolar amounts of Al and P, has advantageous properties that make such co-doped glass useful in a variety of applications, including optical fiber, especially polarization-maintaining optical fiber, and planar waveguides in optical and optoelectronic devices. In particular, such co-doped fused silica can have a refractive index that is lower than, or at least not significantly greater than, that of pure fused silica, even though both Al and P individually are known up-dopants for silica. The co-doped fused silica also can have a relatively low working temperature, while otherwise maintaining many of the desirable properties of fused silica, e.g., chemical inertness and relatively low coefficient of thermal expansion.

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Journal of Lightwave Technology, vol. LT-2, No. 2, Apr. 1984, "Polarization Properties of Birefringent Fibers with Stress Rods in the Cladding", by M. J. Marrone et al, pp. 155-160.
Electronics Letters, vol. 21, 1985, "Low-Loss and Low-Crosstalk Polarisation-Maintaining Optical Fibres" by T. Hosaka et al, pp. 920-921.

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