Optical fiber of the graded index type and method of producing s

Details Optical fiber of the graded index type and method of producing s Optical fiber of the graded index type and method of producing s

1982-06-14

1984-03-27

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

65 313, 350 9634, 501 37, 501 38, 501 55, 501 64, 501 69, 501 70, C03C 304, C03C 310, C03C 1300, G02B 514

Patent

active

044390084

ABSTRACT:
An optical fiber of the graded index type consisting of a glass having predominantly the composition 60-70 mole % SiO.sub.2, 15-30 mole % alkali metal oxides, and 10 to 15 mole % MgO in combination with at least one oxide selected from the group formed by CaO, SrO, BaO and ZnO. The impurity content of the fiber is less than 0.01 ppm. In the fiber the MgO content increases from the axis of the fiber to the circumference of the fiber. The oxide or the other oxides, having cations which can be exchanged for the magnesium cation, decrease to a corresponding extent in this direction.

REFERENCES:
patent: 3937625 (1976-02-01), Stewart
patent: 4264131 (1981-04-01), Sawamura et al.
patent: 4275951 (1981-06-01), Beales et al.
patent: 4351659 (1983-01-01), Beales et al.
patent: 4367012 (1983-01-01), Ikeda et al.

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