Optical fiber preform having barrier layers for hydroxyl (OH) radicals
AssigneeSamsung Electronics Co., Ltd.
InventorsSung-Jin Kim, Sung-Koog Oh
Life of this patent
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Abstract
Disclosed is an optical-fiber preform having barrier layers to hydroxyl radicals, the optical-fiber preform comprising: a quartz tube in the form of a cylinder shape serving as a substrate for forming the optical-fiber preform; a first barrier layer for preventing hydroxyl radicals from permeating the optical-fiber preform and deposited onto the inner surface of the quartz tube; a second barrier layer having a permeation coefficient higher than the first barrier layer and deposited onto the first barrier layer; a third barrier layer having a permeation coefficient lower than the second barrier layer and deposited onto the second barrier layer; and, a core layer being located at the center of the optical-fiber preform.
Claims5
An optical-fiber preform comprising:
- a quartz tube in the form of cylinder shape, defining the optical-fiber preform;
- a first barrier layer, disposed onto the inner surface of the quartz reaction tube, for preventing hydroxyl radicals from permeating the optical-fiber preform;
- a second barrier formed of B2O3+SiO2 material and deposited on the inside of the first barrier, and includes a permeation coefficient substantially higher than the first barrier layer;
- a third barrier having a permeation coefficient substantially lower than the second barrier layer, the third barrier deposited onto the second barrier layer;
- a core layer disposed at the center of the optical-fiber preform;
- and,
- a clad layer having a refractive index substantially lower than the core layer and deposited between the third barrier layer and the core layer.
An optical-fiber preform having a substrate tube, a cladding layer and a core layer, the optical-fiber preform further comprising a first barrier layer, deposited on the inside of the substrate tube, for preventing hydroxyl radicals from permeating the optical-fiber preform;
- a second barrier layer having a permeation coefficient substantially higher than the first barrier layer and deposited on the inside the first barrier layer;
- and, a third barrier layer having a permeation coefficient substantially lower than the second barrier layer and deposited inside the second barrier layer.
Dependencies are inferred from the claim text.