Method of manufacturing optical waveguide

Optical waveguides – Optical fiber waveguide with cladding

Reexamination Certificate

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C385S142000

Reexamination Certificate

active

10960013

ABSTRACT:
Two or more optical waveguides are placed in a treatment vessel. The optical waveguides in the treatment vessel are treated with a chemical substance containing at least one of deuterium, hydrogen, and a compound thereof. The treating includes causing molecules of the chemical substance to diffuse into the optical waveguides, causing the molecules of the chemical substance that have diffused into the optical waveguides to react with structural defects that exist in a portion, through which light propagates, of the optical waveguides, and removing from the optical waveguides molecules of the chemical substance that do not react with the structural defect.

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Y. Namihira, et al., “Hydrogen Problems in Optical Fibers”, The Institute of Electronics, Information and Communication Engineers (IEICE), CS-84, 1984, pp. 27-34 (with partial English translation).
R. W. Lee, et al., “Diffusion of Hydrogen and Deuterium in Fused Quartz”, The Journal of Chemical Physics, vol. 36, No. 4, Feb. 15, 1962, pp. 1062-1071.
Akira Iino, et al., “Mechanisms of Hydrogen-Induced Losses in Silica-Based Optical Fibers”, Journal of Lightwave Technology, IEEE, vol. 8, No. 11, Nov. 1990, pp. 1675-1679.

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