Making a dielectric optical waveguide glass

Details Making a dielectric optical waveguide glass Making a dielectric optical waveguide glass

1976-02-09

1977-05-17

Bashore, S. Leon

Glass manufacturing

Processes

Operating under inert or reducing conditions

65134, 65178, C03B 2314

Patent

active

040239527

ABSTRACT:
A particular range of glass compositions in the soda-boro-silicate glass system has been found to be particularly suitable for ultra-low loss dielectric optical waveguides. The composition range is indicated in FIG. 1 of the specification. By preparing such glasses in a reducing atmosphere (0-2% CO in CO.sub.2) and adding about 1% As.sub.2 O.sub.3 to the melt attenuation coefficients due to copper and iron can be minimized. The water content of the glass can be reduced by bubbling dry CO in CO.sub.2 through the molten glass. Glasses containing less than 30% Na.sub.2 O by weight have the lowest losses. Using glasses of this type dielectric optical waveguides having an insertion loss of less than 14 dBKm.sup.-.sup.1 have been made.

REFERENCES:
patent: 2387222 (1945-10-01), Wright
patent: 2612726 (1952-10-01), Hordberg
patent: 3582307 (1971-06-01), Mulfinger et al.
patent: 3711264 (1973-01-01), Robinson et al.
patent: 3837828 (1974-09-01), Dietz et al.
patent: 3871853 (1975-03-01), Dietz et al.
Glass Technology, vol. 14, No. 5. Oct. 1973 pp. 115-124 - Techniques for Producing Low Loss Glasses for Optical Fibre Communication Systems by B. Scott & H. Rawson.

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