Patent
1984-09-19
1987-06-02
Sikes, William L.
65 311, 65 312, G02B 600
Patent
active
046698213
ABSTRACT:
An optical fiber waveguide resistant to ionizing radiation having a glass core of predetermined refractive index surrounded by glass cladding having a lower predetermined refractive index. The glass core and glass cladding are each composed of high purity silica incorporating gallium as a constituent. The gallium is present in the form of Ga.sub.2 O.sub.3 in a concentration of about 0.01 to 0.15 mole percent ratio to the silica. The glass of the optical waveguide can further include phosphorus in the form of P.sub.2 O.sub.5 as an additional constituent in the amount of from about 5 to 16 mole percent ratio to the total amount of all constituents.
The waveguide of the invention is preferably manufactured by using GaCl.sub.3 in combination with an internal vapor phase process to produce a silica soot (16) containing Ga.sub.2 O.sub.3 on the interior surface of a high purity silica tube (10). The soot is then consolidated and the tube collapsed to form a substantially voidless solid rod preform of high purity SiO.sub.2 containing GeO.sub.2.
The process of manufacture is controlled so as to dispose Ga.sub.2 O.sub.3 within the preform in a concentration of about 0.01 to 0.15 mole percent ratio to the total constituents of the silica preform. The process can further include the deposition of P.sub.2 O.sub.5 within the preform.
REFERENCES:
patent: 4243299 (1981-01-01), Gliemeroth
Smith et al; "Color Centers in X-irradiated Soda-Silica Glasses"; J. of the Amer. Ceramic Soc.; vol. 47, No. 11; Nov. 1964; pp. 564-570.
Chemical Abstracts, vol. 100, nr. 18, 30 Apr. 1984, Columbus, Ohio, (US) see abstract nr. 143848b & JP, A, 58217450, (Nippon Telegraph and Telephone Public Corporation), 17 Dec. 1983.
Chemical Abstracts, vol. 92, nr. 24, 16 Jun. 1980, Columbus, Ohio, (US) see abstract nr. 202470p & JP, A, 79156827, (Sumitomo Electric Industries), 11 Dec. 1979.
Blair G. Richard
Pikulski Joseph L.
Hughes Aircraft Company
Karambelas A. W.
Sikes William L.
Wise Robert E.
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