CN103837928A - Optical fiber used for splicing of double-core optical fiber - Google Patents
Optical fiber used for splicing of double-core optical fiber Download PDFInfo
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- CN103837928A CN103837928A CN201210482936.3A CN201210482936A CN103837928A CN 103837928 A CN103837928 A CN 103837928A CN 201210482936 A CN201210482936 A CN 201210482936A CN 103837928 A CN103837928 A CN 103837928A
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Abstract
The invention discloses an optical fiber used for splicing of a double-core optical fiber. The optical fiber comprises a first fiber core which is arranged at the center of the optical fiber and second fiber cores which are spirally distributed in a way of surrounding the first fiber core. The first fiber core is externally provided with a first low-refractive-index ring. The first low-refractive-index ring is externally provided with a first optical fiber wrapping layer, and the second fiber cores are wrapped inside the first wrapping layer. The first wrapping layer is externally provided with a second low-refractive-index ring and a second wrapping layer in turn. When the optical fiber is spliced with the double-core optical fiber, the fiber core at the center of the optical fiber is easy to align, while the fiber cores in the wrapping layer are difficulty to align. With adoption of a double-refractive-index ring, light emitted by the fiber cores in the wrapping layer is constrained in the double-refractive-index ring. The refractive index of the fiber cores in the wrapping layer is higher than the refractive index of the wrapping layer, an optical signal transmitted in the double-refractive-index ring is easy to enter into the fiber cores in the wrapping layer and is difficult to escape from the fiber cores if the optical signal enters into the fiber cores so that low-loss splicing of the double-core optical fiber is realized.
Description
Technical field
The present invention relates to a kind of optical fiber, relate to specifically a kind of optical fiber continuing for twin-core fiber.
Background technology
The communication of twin-core fiber, image intensifer, a fiber laser Fibre Optical Sensor have certain application, but continuing between twin-core fiber is upper more difficult, particularly fibre core is while distributing round another fibre core with spiral fashion, the fibre core that is positioned at center routinely fibre junction just can, as the heat sealing machine that adopts fibre core to aim at just can connect, but another fibre core has certain helix angle, its fibre core is aimed at just more difficult, thereby causes connecting loss higher.
Summary of the invention
For addressing the above problem, the technical solution used in the present invention is:
A kind of twin-core fiber continues with optical fiber, comprise and be positioned at the fibre core 1 of fiber optic hub and the fibre core 22 around fibre core one 1 spiral distribution, it is characterized in that: outside fibre core 1, have low-refraction ring 1, it outside low-refraction ring 1, is fibre cladding 1, fibre core 22 is positioned at covering 1, is low-refraction ring 25 and covering 26 outside covering 1 successively.
The exponent of refractive index of fibre core 22 is high by 0.3% compared with the exponent of refractive index of covering 1.
The exponent of refractive index of low-refraction ring 1 and low-refraction ring 25 is low by 0.15% compared with the exponent of refractive index of covering 1.
Covering 1 is that pure silicon dioxide material forms, and low-refraction ring 1 and low-refraction ring 25 are that the material that is added with fluorine element in earth silicon material forms.
The present invention compared with prior art has the following advantages:
When optical fiber of the present invention and twin-core fiber continue, the fibre core that is positioned at fiber optic hub is easy to aim at, and the more difficult aligning of the fibre core that is positioned at covering, but by adopting birefraction ring, the light that fibre core in covering is sent is strapped in birefraction ring, and because the refractive index of fibre core that is positioned at covering is higher than the refractive index of covering, make the light signal of propagating in birefraction ring be easy to enter the fibre core that is positioned at covering, once and enter this fibre core, light signal is difficult to this fibre core of fugitive effusion, continues thereby realized low-loss twin-core fiber.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is the schematic diagram of apparatus of the present invention concrete structure.
Fig. 2 is the refractive index profile figure of Fig. 1 optical fiber cross section along diameter.
Description of reference numerals:
1-fibre core one; 2-fibre core two; 3-low-refraction ring one;
4-covering one; 5-low-refraction ring two; 6-covering two.
Embodiment
Embodiment
A kind of twin-core fiber as shown in Figure 1 and Figure 2 continues with optical fiber, comprise and be positioned at the fibre core 1 of fiber optic hub and the fibre core 22 around fibre core one 1 spiral distribution, outside fibre core 1, there is low-refraction ring 1, it outside low-refraction ring 1, is fibre cladding 1, fibre core 22 is positioned at covering 1, is low-refraction ring 25 and covering 26 outside covering 1 successively.When optical fiber of the present invention and twin-core fiber continue, the fibre core 1 that is positioned at fiber optic hub is easy to aim at, and be positioned at the more difficult aligning of fibre core 22 of covering 1, but by adopting birefraction ring, the light that interior covering 1 fibre core 22 is sent is strapped in birefraction ring, and because the refractive index of fibre core 22 that is positioned at covering 1 is higher than the refractive index of covering 1, after the fiber lengths of tens meters or tens meters, the light signal of propagating in birefraction ring is easy to enter the fibre core 22 that is positioned at covering 1, once and enter this fibre core 22, light signal is difficult to this fibre core 22 of fugitive effusion, thereby having realized low-loss twin-core fiber continues.
Preferably, the exponent of refractive index of fibre core 22 is high by 0.3% compared with the exponent of refractive index of covering 1.
Preferably, the exponent of refractive index of low-refraction ring 1 and low-refraction ring 25 is low by 0.15% compared with the exponent of refractive index of covering 1.
Preferably, covering 1 is that pure silicon dioxide material forms, and low-refraction ring 1 and low-refraction ring 25 are that the material that is added with fluorine element in earth silicon material forms.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
Claims (4)
1. a twin-core fiber continues with optical fiber, comprise and be positioned at the fibre core one (1) of fiber optic hub and the fibre core two (2) around fibre core one (1) spiral distribution, it is characterized in that: outside fibre core one (1), have low-refraction ring one (3), it outside low-refraction ring one (3), is fibre cladding one (4), fibre core two (2) is positioned at covering one (4), is low-refraction ring two (5) and covering two (6) outside covering one (4) successively.
2. twin-core fiber according to claim 1 continues with optical fiber, it is characterized in that: the exponent of refractive index of fibre core two (2) is high by 0.3% compared with the exponent of refractive index of covering one (4).
3. twin-core fiber according to claim 1 continues with optical fiber, it is characterized in that: the exponent of refractive index of low-refraction ring one (3) and low-refraction ring two (5) is low by 0.15% compared with the exponent of refractive index of covering one (4).
4. twin-core fiber according to claim 1 continues with optical fiber, it is characterized in that: covering one (4) is that pure silicon dioxide material forms, low-refraction ring one (3) and low-refraction ring two (5) are that the material that is added with fluorine element in earth silicon material forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482936.3A CN103837928A (en) | 2012-11-26 | 2012-11-26 | Optical fiber used for splicing of double-core optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482936.3A CN103837928A (en) | 2012-11-26 | 2012-11-26 | Optical fiber used for splicing of double-core optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103837928A true CN103837928A (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210482936.3A Pending CN103837928A (en) | 2012-11-26 | 2012-11-26 | Optical fiber used for splicing of double-core optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103837928A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752790A (en) * | 2017-11-03 | 2019-05-14 | 桂林电子科技大学 | A kind of producible vortex light and the coaxial double wave guiding fiber of toroidal field and preparation method thereof |
-
2012
- 2012-11-26 CN CN201210482936.3A patent/CN103837928A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752790A (en) * | 2017-11-03 | 2019-05-14 | 桂林电子科技大学 | A kind of producible vortex light and the coaxial double wave guiding fiber of toroidal field and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140604 |