Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1982-09-29
1986-02-04
Bashore, S. Leon
Glass manufacturing
Processes
Forming product or preform from molten glass
65 312, 65 182, C03B 37012
Patent
active
045683700
ABSTRACT:
A porous glass optical waveguide preform is formed by depositing a coating of glass particulate material on the lateral surface of a core which may be a porous glass body continuously produced by the axial deposition of glass particles. The core rotates and moves longitudinally in one direction with respect to two flame hydrolysis burners which emit streams of glass particles having different compositions. In addition, the two burners reciprocatingly move with respect to a portion of the length of the core. The speed of each burner varies as it traverses along its path of reciprocating motion. The thickness of the layer produced by a burner at a given point is inversely related to the speed of the burner as it passes that point. The layers formed by the completion of a single traverse by both burners combine to form a conically-shaped layer, the composition of which varies from the base toward the apex thereof. The conically-shaped layer, which are adjacently located longitudinally along the preform, combine to form a cylindrically-shaped portion of the preform.
REFERENCES:
patent: 3957474 (1976-05-01), Kobayashi et al.
patent: 4265515 (1981-05-01), Kao
patent: 4310339 (1982-01-01), Blankenship
patent: 4378985 (1983-04-01), Powers
patent: 4388094 (1983-06-01), Carpenter et al.
Applied Optics, vol. 20, No. 13, 1 Jul. 1981, pp. 2314-2318.
U.S. Patent Application Ser. No. 270,235, now U.S. Pat. No. 4,378,985, "Method of Forming an Optical Waveguide Fiber", filed 6-4-81, (D. R. Powers).
"Fabrication of Periodic Waveguides by Ion Exchange", by Pun et al., published in Appl. Phys. Lett., vol. 38, No. 9, May 1, 1981.
"Refractive Index Lowering of the Cladding for Optical Fiber Waveguides", by Pliskin, published in IBM Technical Disclosure Bulletin, vol. 18, No. 5, Oct. 1975.
Bashore S. Leon
Boyer Michael K.
Corning Glass Works
Simmons, Jr. W. J.
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