公开(公告)号：US11286196B2

公开(公告)日：2022-03-29

申请号：US16811336

申请日：2020-03-06

申请人： Fujikura Ltd.

发明人： Kenji Okada

IPC分类号： C03B37/03 ,  C03C25/104

摘要： An optical fiber manufacturing method includes: coating an outer periphery of a bare optical fiber with a resin before curing by a coating device; and curing the resin with a coating curing device. The following equations are satisfied: t×sin θ>T1× tan θ and θ=tan−1 (d/L), where T1 is a tension in the upstream of the coating device, t is the shear force applied to the bare optical fiber by the resin, d is the design maximum value of a deviation amount of an entry position of the bare optical fiber into the resin in the coating device with respect to the center axis of the die hole of the coating device, and L is the contact length between the resin and the bare optical fiber in the coating device along the center axis.

公开(公告)号：US20220089480A1

公开(公告)日：2022-03-24

申请号：US17406523

申请日：2021-08-19

申请人： CORNING INCORPORATED

发明人： Kenneth Duane Billings ,  Hector Michael Belleza De Pedro ,  Robert Clark Moore ,  Zachary Joseph Quist ,  Michael James Todt

IPC分类号： C03C25/12 ,  C03C25/104

摘要： An apparatus for curing a coating composition disposed on a glass optical fiber. The apparatus includes a reflector, the reflector having an interior surface delineating a boundary of a cavity, the interior surface including a plurality of portions, each of the portions extending along a different curved contour. Furthermore, each of the plurality of portions is configured to reflect curing light so that the reflected curing light is concentrated to a curing zone within the cavity such that all the reflected curing light within the curing zone has an intensity of about 60% or greater relative to a maximum intensity of the reflected curing light. A fiber location for the glass optical fiber is located within the curing zone. Additionally, the plurality of portions includes at least a first portion and a second portion, the first portion having a different degree of curvature than the second portion.

公开(公告)号：US20210094873A1

公开(公告)日：2021-04-01

申请号：US17030605

申请日：2020-09-24

申请人： CORNING INCORPORATED

发明人： Dana Craig Bookbinder ,  Stephan Lvovich Logunov ,  Darren Andrew Stainer ,  Pushkar Tandon ,  Ruchi Tandon

IPC分类号： C03C25/104 ,  C03C25/12 ,  G02B6/02 ,  C03C25/6226

摘要： An optical fiber curing component includes a first tube comprising a first body defining a first interior surface and a first exterior surface, the first tube defining a first aperture and a second aperture on opposite ends of a first cavity, wherein the first tube defines a central axis extending through the first cavity; light sources coupled to the first body of the first tube and configured to emit light toward the central axis of the first tube, wherein each of the light sources intersect a common plane defined perpendicular to the central axis of the first tube; a silica glass article, having an anti-reflective coating, disposed between each of the plurality of light sources and the central axis of the first tube; and a reflective coating positioned on the interior surface of the first body and configured to reflect the light toward the central axis of the first tube.

公开(公告)号：US20200339465A1

公开(公告)日：2020-10-29

申请号：US16923490

申请日：2020-07-08

申请人： FURUKAWA ELECTRIC CO., LTD.

发明人： Mitsuhiro KAWASAKI ,  Tomohiro GONDA

IPC分类号： C03B37/014 ,  G02B6/02 ,  C03C25/104 ,  G02B6/036

摘要： A method for manufacturing an optical fiber preform includes: producing a core preform including a core portion made of transparent glass and a first cladding layer obtained by adding fluorine to the core portion; and forming, on an outer periphery of the first cladding layer, a second cladding layer made of glass having a refractive index higher than that of the first cladding layer. Further, a refractive index profile is formed in the first cladding layer due to a fluorine concentration profile, the refractive index profile being provided at least near a boundary surface with the second cladding layer and having a profile such that a refractive index difference between a refractive index of the first cladding layer and a refractive index of the second cladding layer decreases in accordance with a reduction in a distance from the boundary surface with the second cladding layer.

公开(公告)号：US20200290919A1

公开(公告)日：2020-09-17

申请号：US16811336

申请日：2020-03-06

申请人： Fujikura Ltd.

发明人： Kenji Okada

IPC分类号： C03B37/03 ,  C03C25/104

摘要： An optical fiber manufacturing method includes: coating an outer periphery of a bare optical fiber with a resin before curing by a coating device; and curing the resin with a coating curing device. The following equations are satisfied: t×sin θ>T1× tan θ and θ=tan−1 (d/L), where T1 is a tension in the upstream of the coating device, t is the shear force applied to the bare optical fiber by the resin, d is the design maximum value of a deviation amount of an entry position of the bare optical fiber into the resin in the coating device with respect to the center axis of the die hole of the coating device, and L is the contact length between the resin and the bare optical fiber in the coating device along the center axis.

公开(公告)号：US20180273427A1

公开(公告)日：2018-09-27

申请号：US15995796

申请日：2018-06-01

申请人： Furukawa Electric Co., Ltd.

发明人： Hiroki TANAKA ,  Yutaka HOSHINO ,  Hirotaka WATANABE ,  Yoshihiro ARASHITANI ,  Kenji YOKOMIZO ,  Tomohiro ISHIMURA

IPC分类号： C03C25/24 ,  G02B6/44 ,  C03C25/104 ,  C03C25/475 ,  G02B6/02

摘要： An optical fiber ribbon is intermittently connected in a length direction by an intermittent connection which includes a polyol having a weight-average molecular weight of 3000 to 4000 in a specific amount relative to the entire intermittent connection and which has Young's modulus at 23° C. within a specific range. When collectively unitizing optical fiber ribbons to form an optical fiber cable, an optical fiber ribbon is formed which maintains advantages of the optical fiber ribbon and which prevents cracks of the intermittent connection and detachment of the intermittent connection from a colored optical fiber core when the cable is subjected to repetitive ironing.