Ultralow-loss silica glass and optical fibers using the same

Details Ultralow-loss silica glass and optical fibers using the same Ultralow-loss silica glass and optical fibers using the same

1999-01-13

2000-11-28

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 54, C03C 1304, C03C 306

Patent

active

06153546&

ABSTRACT:
This ultralow-loss glass is characterized in that high purity silica glass contains 1 to 500 wt.ppm of at least one network modifying oxide. It is assumed that the network modifying oxide appropriately loosens the tetrahedral network structure of silica and hence Rayleigh scattering is decreased. Examples of the network modifying oxide include Na.sub.2 O, K.sub.2 O, Li.sub.2 O, MgO, CaO, and PbO. Since Rayleigh scattering losses are minimal in comparison with those of high purity silica glass, this impurity-added silica glass is excellent as a base material of a glass fiber for a long-distance transmission.

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Lines, "Can the Minimum Attenuation of Fused Silica be Significantly Reduced by Small Compositional Variations? I. Alkali Metal Dopants", Journal of Non-Crystalline Solids, vol. 171, No. 3, Aug. 2, 1994, pp. 209-218, XP000486704, North-Holland Physics Publishing, Amsterdam, NL..
Lines, "Can the Minimum Attenuation of Fused Silica be Significantly Reduced by Small Compositional Variations? II. Combined Fluorine and Alkali Metal Dopants", Journal of Non-Crystalline Solids, vol. 171, No. 3, Aug. 2, 1994, pp. 219-227, XP002110412, North-Holland Physics Publishing, Amsterdam, NL..
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