Glass having refractive index distribution

Details Glass having refractive index distribution Glass having refractive index distribution

1993-08-09

1995-02-21

Lindsay, Robert L.

Optical waveguides

Optical fiber waveguide with cladding

With graded index core or cladding

65404, 65 173, 65 64, 65102, G02B 618

Patent

active

053923758

ABSTRACT:
A process for producing a glass having a rod refractive index distribution, which includes pressing a glass at a temperature below the glass transition temperature to form a glass having a density increased towards the surface layer thereof, or alternatively includes heating a glass at a temperature around the transition temperature at the lowest to prepare glass having a uniformly enhanced density and heating the treated glass under a pressure lower than the applied pressure at a temperature below the glass transition temperature of the glass to prepare a rod glass having a density increased towards the central portion.

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J. Arndet et al, "Anomalous changes in some properties of silica glass densified at very high pressures", Physics and Chemistry of Glasses, vol. 10, pp. 117-124 (June. 1969).
H. Hummel et al, "Anomalous Optical Relaxation Behaviour of Densified SiO.sub.2 Glass", J. Non-Crystalline Solids, 109 pp. 40-46 (1989).
J. D. MacKenzie, "High-Pressure Effects on Oxide Glasses: I, Densification in Rigid State"; J. Amer. Ceramic Soc., 46, pp. 470-476 (Oct. 21,.
J. D. MacKenzie, "High-Pressure Effects on Oxide Glasses: II, Subsequent Heat Treatment", J. Amer. Ceramic Soc., 46 pp. 461-470 (Oct. 1963).
Shand, Glass Engineering Handbook, (1959), P106-109.
Hampton, Some Problems Relating to Optical Glasses, vol. 54, Part 5, The Proceedings of the Physical Society, pp. 392-404 (Sep. 1, 1942).

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