Glass material for optical fibers used in infrared region

Details Glass material for optical fibers used in infrared region Glass material for optical fibers used in infrared region

1984-11-26

1986-09-16

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

65DIG15, 501 37, 501904, C03C 332

Patent

active

046122940

ABSTRACT:
A selenium-base chalcogenide glass for use as optical fibers suitable for transmitting with low loss infrared rays, particularly that of 10.6 .mu.m in wavelength, is provided. The infrared optical fibers with low transmission loss, which is suitable for practical use, are obtained by incorporating 2 to 100 ppm of at least one of Al Ga, and In into a selenium-base chalcogenide glass, thereby to reduce the absorption due to the vibration of Ge--O bond formed by the contamination with oxygen. The infrared optical fibers made of such a glass material show a transmission loss of 3-4 dB/m which is less than 1/2.5 of the loss (10 dB/m) of a reference glass.

REFERENCES:
patent: 3360649 (1967-12-01), Brau et al.
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patent: 3615413 (1969-06-01), Fisher et al.
patent: 3627573 (1971-12-01), Schottmiller et al.
patent: 3901996 (1975-08-01), Hasegawa et al.
patent: 4154503 (1979-05-01), Lettington et al.
Hilton, A. R. et al., "Non-Oxide IVA-VA-VIA Chalcogenide Glasses Part 1 and Part 2", Physics and Chemistry of Glasses 7(4) Aug. 1966, pp. 105-116.
Feltz, A. et al., "Glass Formation and Structure of Chalcogenide Systems XXV, Permittivity of Vitreous Selenium", J. of Non-Crystalline Solids 51 (1982) pp. 395-398.

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