Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1978-07-31
1980-10-21
Fisher, Richard V.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
65 3A, 427163, G02B 514, C03B 37075
Patent
active
042290708
ABSTRACT:
A method of forming a preform or blank for a high bandwidth gradient index optical filament, the preform itself and the resulting optical filament is disclosed. The preform which ultimately forms the optical filament includes a barrier layer between a tubular starting member which comprises the cladding and the core, the index of refraction of the barrier layer being equal to or less than the index of refraction of the tubular starting member; there being no step increase in the index of refraction of the barrier layer at the barrier layer-cladding interface nor of the core at the core-barrier layer interface of the optical filament. The tubular starting member is formed of a base glass and at least one dopant, the index of refraction of the tubular starting member being in excess of said base glass. The barrier layer is formed from a base glass and at least one dopant which is maintained substantially constant in the barrier layer. The core is formed of a base glass and at least one dopant which is gradually varied during the formation of the core, the core being free of B.sub.2 O.sub.3.
REFERENCES:
patent: Re28028 (1974-06-01), Maurer
patent: 3711262 (1973-01-01), Keck et al.
patent: 3785718 (1974-01-01), Gloge
patent: 3823995 (1974-07-01), Carpenter
patent: 3884550 (1975-05-01), Maurer et al.
patent: 4087266 (1978-05-01), Irven et al.
Vapor Deposition, edited by C. F. Powell et al., 1966, pp. 3 & 259-263.
Olshansky Robert
Sarkar Arnab
Corning Glass Works
Fisher Richard V.
Simmons, Jr. William J.
Zebrowski Walter S.
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