Optical fiber cable and optical fiber ribbon
First Claim
1. An optical fiber cable that includes optical fiber ribbons composed of 3-fiber or more mono-coated optical fibers coated at the outer circumference of optical fibers, wherein the optical fiber cable comprising:
- (a) a cable core portion having;
(i) a plurality of units that are twisted in one direction and collected, wherein each of said units is configured with;
(1) a bundle of three or more mono-coated optical fibers,wherein said bundle has a first resin portion that bonds an adjacent pair of said optical fibers at a first place, and a second resin portion that bonds said adjacent pair at a second place,wherein said first and second resin portions are separated from one another by a length of a non-resin portion that does not bond said adjacent pair, andwherein each of said first resin portion and said second resin portion has a length that is shorter than said length of said non-resin portion; and
(2) a colored thread wound around an outer circumference of said bundle; and
(ii) a wrapping layer wound around an outer circumference of said plurality of units; and
(b) a sheath around an outer circumference of said cable core portion.
1 Assignment
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Accused Products
Abstract
Amono-coated optical fiber that has a bending loss characteristic in which an optical loss increase at a bending radius 13 mm is 0.2 dB/10 turn or less, an optical fiber ribbon that includes two-dimensionally disposed resin portions for bonding the adjacent 2-fiber mono-coated optical fibers in plural places, the resin portions being disposed apart from each other in the longitudinal direction of the optical fiber ribbon and an optical fiber cable that includes a cable core portion that stores twisting of plural units where the mono-coated optical fibers constituting the optical fiber ribbon are collected.
285 Citations
25 Claims
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1. An optical fiber cable that includes optical fiber ribbons composed of 3-fiber or more mono-coated optical fibers coated at the outer circumference of optical fibers, wherein the optical fiber cable comprising:
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(a) a cable core portion having; (i) a plurality of units that are twisted in one direction and collected, wherein each of said units is configured with; (1) a bundle of three or more mono-coated optical fibers, wherein said bundle has a first resin portion that bonds an adjacent pair of said optical fibers at a first place, and a second resin portion that bonds said adjacent pair at a second place, wherein said first and second resin portions are separated from one another by a length of a non-resin portion that does not bond said adjacent pair, and wherein each of said first resin portion and said second resin portion has a length that is shorter than said length of said non-resin portion; and (2) a colored thread wound around an outer circumference of said bundle; and (ii) a wrapping layer wound around an outer circumference of said plurality of units; and (b) a sheath around an outer circumference of said cable core portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 17, 18, 19, 20)
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11. An optical fiber cable comprising:
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(1) a plurality of units that are twisted and collected, wherein each of said units is configured with; (a) a bundle of optical fiber ribbons, wherein each of said optical fiber ribbons includes; (i) a quantity of n mono-coated optical fibers, where n is a natural number greater than or equal to 2, and (ii) a quantity of (n−
1) connecting portions disposed apart from each other to cause said optical fibers to not contact each other, and continuously connecting adjacent ones of said optical fibers in a longitudinal direction,wherein; (A) in at least (n/2−
1) of said connecting portions, a thickness of each of said at least (n/2−
1) connecting portions is set to b,(B) an outer diameter of each of said optical fibers is set to d, (C) a relation between b and d is b≦
d, and(D) a length h of each of said at least (n/2−
1) connecting portions is in a range of 100 (b/d)^2≦
h≦
312.5 μ
m−
d, andwherein each of b, d and h is in units of μ
m; and(b) a colored thread wound around an outer circumference of said bundle; and (2) a wrapping layer wound around an outer circumference of said plurality of units. - View Dependent Claims (12, 13, 14, 15, 21, 22, 23, 24, 25)
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Specification