Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1980-07-24
1982-11-09
Fisher, Richard V.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
65 311, 65 312, 350 9634, 427163, C03B 3707, C03B 37075
Patent
active
043581811
ABSTRACT:
In the method of making a preform for a high numerical aperture gradient index optical waveguide, the concentration of two dopant constituents is changed during fabrication. Concentration of the first dopant, GeO.sub.2, is changed radially as the preform is built up in order to produce the desired radial refractive index gradient. The concentration of the second dopant, B.sub.2 O.sub.3, is changed radially to compensate for the radial change in thermal expansion coefficient caused by the varying GeO.sub.2 concentration. B.sub.2 O.sub.3 is added to the cladding layer to make the thermal expansion coefficient of the cladding equal to or greater than the composite thermal expansion coefficient of the core. The magnitude of residual tension at the inner surface caused by thermal expansion gradients is reduced and premature cracking of the preform is eliminated.
REFERENCES:
patent: 3778132 (1973-12-01), Pinnow et al.
patent: 3823995 (1974-07-01), Carpenter
patent: 3826560 (1974-07-01), Schultz
patent: 3957474 (1976-05-01), Kobayashi et al.
patent: 3982916 (1976-09-01), Miller
patent: 4017288 (1977-04-01), French et al.
patent: 4025156 (1977-05-01), Gloge et al.
patent: 4042404 (1977-08-01), Schultz
patent: 4062665 (1977-12-01), Izawa
patent: 4148621 (1979-04-01), Gliemeroth
patent: 4161505 (1979-07-01), Shiraishi et al.
patent: 4181403 (1980-01-01), Macedo et al.
patent: 4194807 (1980-03-01), Gliemeroth
patent: 4243298 (1981-01-01), Kao et al.
Rigterink, "Material Systems . . . of Glass Fiber Optical Waveguides", Ceramic Bulletin, vol. 55, No. 9, (1976), pp. 775-780.
O'Connor et al., "Preparation . . . of High Silica, Graded Index Optical Fibers", Ceramic Bulletin, vol. 55, No. 5, (1976), pp. 513-519.
Gulati Suresh T.
Scherer George W.
Corning Glass Works
Fisher Richard V.
Zebrowski Walter S.
LandOfFree
Gradient index optical waveguide and method of making does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gradient index optical waveguide and method of making, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gradient index optical waveguide and method of making will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-743723