CN102445736A - Optical fiber with low bending loss - Google Patents
Optical fiber with low bending loss Download PDFInfo
- Publication number
- CN102445736A CN102445736A CN2010105047805A CN201010504780A CN102445736A CN 102445736 A CN102445736 A CN 102445736A CN 2010105047805 A CN2010105047805 A CN 2010105047805A CN 201010504780 A CN201010504780 A CN 201010504780A CN 102445736 A CN102445736 A CN 102445736A
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- optical fiber
- refractive index
- little
- bending loss
- sheath
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Abstract
The invention relates to an optical fiber with low bending loss. A sheath is used to cover a plurality of optical fibers and coil the fibers in a spiral mode; therefore, less bending losses are generated at a signal optical wavelength position; and moreover, it can be avoided that an optical fiber is fractured due to unexpected bending during installation or other operations.
Description
Technical field
The present invention relates to a kind of little bend loss optical fiber, particularly the surface forms reeded optical fiber.
Background technology
For for example with optical fibre installation to the FTTH (Fiber to the home) of each family and with optical fibre installation to the roadside or the FTTC optical transmission systems such as (Fiber To The Curb) of electric pole, must suitably handle optical fiber excess length.In order suitably to handle optical fiber excess length, surplus long part is reeled and is stored in the storage box.At this moment, if the bending loss of optical fiber is little, then can this roll of optical fiber coiled be had minor diameter, thereby can use little storage box.Therefore, expectation optical fiber has little bending loss.Disclosed the optical fiber that meets standard G.652 and can reduce bending loss significantly in the prior art.Yet, can not avoid the fracture when installing or other operating period, accident was crooked of this optical fiber.
Summary of the invention
In order to solve above-mentioned drawback, the present invention provides a kind of little bending loss optical cable, comprising: fibre core, and it has refractive index n 1; The carbon overlay is set on the fibre core surface, and it is around said fibre core and have the little refractive index n of specific refractivity n1 2; On the triumphant surface of carbon overlay cottonrose hibiscus is set and draws layer, it is around said carbon overlay and have the little refractive index n of specific refractivity n2 3; The spiral fashion coiling sheath that the optical fiber outermost layer is provided with; On the surface of said sheath, be formed with groove along said optical fiber.
Description of drawings
The little bend loss optical fiber structural representation of Fig. 1 the present invention.
Embodiment
Fig. 1 illustrates the optical fiber according to the embodiment of the invention, and optical fiber 1 comprises fibre core, first covering, second covering, as the glass part of optical fiber 1.The carbon overlay is set on the surface of glass part.Set gradually first resin bed and second resin bed around the carbon overlay.The each several part of optical fiber 1 has constant refractive index.Yet those skilled in the art can easily find out similar structure (for example, because manufacturing approach, the refractive index of various piece is the structure that tilts or have fluctuation).Fibre core has radius r 1 and refractive index n 1.First covering that surrounds fibre core has the little refractive index n 2 of inside radius r1, external radius r2 and specific refractivity n1.Second covering that surrounds first covering has the little refractive index n 3 of inside radius r2, external radius r3 and specific refractivity n2.
The take up member that said optical fiber 1 laterally arranges; And the sheath that covers said optical fiber 1 and said take up member; Wherein, on the surface of said sheath, be formed with groove along said optical fiber.Multifiber is provided with abreast and is covered integratedly by resin, and in the following ON-LINE SEPARATION loss recruitment of operating period when wavelength is 1550nm less than 0.5dB/km/s, said ON-LINE SEPARATION operation is what to carry out with the mode of separating at interlude.
If the carbon overlay is not set on the surface of glass part, then static fatigue coefficient n is in 20 to 25 scope.Through the carbon coat is set on the surface of glass part, can make static fatigue coefficient n greater than 30.Therefore, even, also guarantee long-term reliability in radius-of-curvature hour.
In addition, on the surface of the sheath of optical fiber both sides, form groove.Thereby can separating along groove, sheath can easily pull out optical fiber.Optical cable allows radius-of-curvature to reduce when preventing fibercuts.
Optical cable comprises according to optical fiber of the present invention and spiral fashion protection structure, and this spiral fashion protection structure is processed by lilion (nylon) bar and around optical fiber.Through spiral fashion protection structure is set around optical fiber, can make optical fiber stronger from the ability that exceeds recovery of elasticity under the bending to a certain degree.Like this, prevent that the little radius-of-curvature of the curvature of optical fiber when reducing than reliability is crooked.
The invention is not restricted to the foregoing description; In concept of the present invention; According to the description of above-mentioned instructions, those of ordinary skill in the art also can make some conspicuous changes, but these changes all should fall within the protection domain of claim of the present invention.
Claims (1)
1. one kind little bending loss optical cable is characterised in that, comprising: fibre core, and it has refractive index n 1; The carbon overlay is set on the fibre core surface, and it is around said fibre core and have the little refractive index n of specific refractivity n1 2; On the triumphant surface of carbon overlay cottonrose hibiscus is set and draws layer, it is around said carbon overlay and have the little refractive index n of specific refractivity n2 3; The spiral fashion coiling sheath that the optical fiber outermost layer is provided with; On the surface of said sheath, be formed with groove along said optical fiber (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105047805A CN102445736A (en) | 2010-10-13 | 2010-10-13 | Optical fiber with low bending loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105047805A CN102445736A (en) | 2010-10-13 | 2010-10-13 | Optical fiber with low bending loss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102445736A true CN102445736A (en) | 2012-05-09 |
Family
ID=46008406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105047805A Pending CN102445736A (en) | 2010-10-13 | 2010-10-13 | Optical fiber with low bending loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102445736A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201035197Y (en) * | 2007-04-30 | 2008-03-12 | 无锡华能电缆有限公司 | Phase line complex optical fibre cable of complex material |
| CN101430402A (en) * | 2007-11-09 | 2009-05-13 | 普拉德研究及开发股份有限公司 | Hydrocarbon monitoring cable |
| CN201281772Y (en) * | 2008-06-07 | 2009-07-29 | 江苏亨通光电股份有限公司 | Minitype semi-closed-cover air transport fiber-optical unit |
-
2010
- 2010-10-13 CN CN2010105047805A patent/CN102445736A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201035197Y (en) * | 2007-04-30 | 2008-03-12 | 无锡华能电缆有限公司 | Phase line complex optical fibre cable of complex material |
| CN101430402A (en) * | 2007-11-09 | 2009-05-13 | 普拉德研究及开发股份有限公司 | Hydrocarbon monitoring cable |
| CN201281772Y (en) * | 2008-06-07 | 2009-07-29 | 江苏亨通光电股份有限公司 | Minitype semi-closed-cover air transport fiber-optical unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120509 |