Dielectric optical waveguides

Details Dielectric optical waveguides Dielectric optical waveguides

C - Chemistry, Metallurgy

03

C

261/18, 31/183,

C03C 13/00 (2006.01) C03C 3/064 (2006.01) C03C 3/089 (2006.01) C03C 13/04 (2006.01)

Patent

CA 1047245

ABSTRACT OF THE DISCLOSURE A particular range of glass compositions in the soda-boro-silicate glass system has been found to be part- icularly suitable for ultra-low loss dielectric optical waveguides. By preparing such glasses in a reducing atmosphere (0.20% CO in CO2) and about 1% As2O3 to the melt attenuation coefficients due to copper and iron can be mini- mized. The water content of the glass can be reduced by bubbling dry CO in CO2 through the molten glass. Glasses containing less than 30% Na2O by weight have the lowest losses. Using glasses of this type dielectric optical waveguides having an insertion loss of less than 14 dBKm-1 have been made.

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