Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Patent
1992-08-03
1994-04-19
Bovernick, Rodney B.
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
385141, 385144, 501 42, G02B 514
Patent
active
053054148
ABSTRACT:
Optical fibers and glass composition comprising a mixture of barium oxide, gallium oxide, germanium oxide, and a modifying agent selected from lanthium oxide, indium oxide, and mixtures thereof; molar ratio of barium oxide to gallium oxide is from about 4:1 to about 1:1, preferably 2:1 to 1, and especially about 1:1; amount of germanium oxide is at least 40 mole percent, preferably 60 to 95 mole percent, and especially 65 to 90 mole percent; about 0.1 to about 5 mole percent, preferably 0.5 to 4, of gallium oxide is replaced with the modifying agent. The optical fibers made from the glass composition defined herein, with or without the modifying agent, have light transmission wavelength band of about 0.3 to 4 microns; lower optical loss than silica-based optical fibers, the minimum optical loss of the novel fibers having the potential of 0.05 dB/km at 2 microns.
REFERENCES:
patent: 4194807 (1980-03-01), Gliemeroth
patent: 4197136 (1980-04-01), Inoue et al.
patent: 4771020 (1988-09-01), Omata et al.
patent: 4999321 (1991-03-01), Kohli
patent: 5148510 (1992-09-01), Borrelli et al.
Miller, "Properties and Structure of Alkali and Alkaline Earth Gallogermae Glasses", 1991, pp. 4 & 110.
Aggarwal Ishwar D.
Friebele Edward J.
Higby Paige L.
Bovernick Rodney B.
Kap George A.
McDonnell Thomas E.
Sanghavi Hemang
The United States of America as represented by the Secretary of
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