CN104459876A - Single-mode optical fiber with ultralow attenuation and large effective area - Google Patents
Single-mode optical fiber with ultralow attenuation and large effective area Download PDFInfo
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- CN104459876A CN104459876A CN201410759087.0A CN201410759087A CN104459876A CN 104459876 A CN104459876 A CN 104459876A CN 201410759087 A CN201410759087 A CN 201410759087A CN 104459876 A CN104459876 A CN 104459876A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03694—Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties
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Abstract
The invention relates to a single-mode optical fiber with ultralow attenuation and a large effective area. The single-mode optical fiber comprises a core layer and a wrapping layer and is characterized in that the core layer comprises a sinking core layer body and an outer core layer body from center to outside; the wrapping layer comprises an inner wrapping layer body, a sinking inner wrapping layer body, an auxiliary outer wrapping layer body and an outer wrapping layer body from inside to outside; the radius R1 of the sinking core layer body ranges from 1.5 Mum to 4 Mum, and the relative refractivity ranges from minus 0.10% to 0.02%; the radius R2 of the outer core layer body ranges from 4.5 Mum to 6.5 Mum, and the relative refractivity ranges from minus 0.08% to 0.10%; the radius R3 of the inner wrapping layer body ranges from 9 Mum to 15 Mum, and the relative refractivity ranges from minus 0.25% to minus 0.1%; the radius R4 of the sinking inner wrapping layer body ranges from 12 Mum to 20 Mum, and the relative refractivity ranges from minus 0.6% to minus 0.25%; the radius R5 of the auxiliary inner wrapping layer body ranges from 35 Mum to 50 Mum, and the relative refractivity ranges from minus 0.45% to minus 0.15%; the outer wrapping layer body is a pure silicon dioxide glass layer. The single-mode optical fiber has the large effective area and good bending loss and chromatic dispersion performance, the cabling cutoff wavelength is smaller than 1530 nm, and the production cost is low.
Description
Technical field
The present invention relates to Optical Fiber Transmission field, be specifically related to a kind of single-mode fiber with ultralow attenuation large effective area, for long distance, Large Copacity, high rate communication transmission system.
Background technology
Along with the appearance of coherent transfer technology, in Optical Fiber Transmission field, the long distance of original restriction, some important indicators of Large Copacity and high rate data transmission no longer become restriction, and the index of dispersion in the transmission system in future (CD) and polarization mode dispersion (PMD) can further be relaxed.But the decay of optical fiber and useful area still become the major issue of restriction optical communication technology development.
Especially, in the transmission system of the 400G or higher in future, the reduction of decay will greatly reduce construction and the maintenance cost of whole system.For 400G system, if the 1550nm attenuation coefficient of optical fiber is reduced to 0.18dB/km, by the increase across section transmission range, can reduce by the regeneration base station of 20%; If optical fiber attenuation reduces 0.16dB/km further, then can reduce by the regeneration base station of about 40%.In like manner, if by increasing the useful area of optical fiber to 100um
2or higher, suppressing the condition of nonlinear effect of optical fiber, pump power is being improved, reaching with reducing optical fiber attenuation to the same effect of 0.16dB/km.Therefore, development and Design manufacture the important topic that a kind of ultralow attenuation large effective area optical fiber becomes optical fiber fabrication arts.
The main technique of the ultralow attenuating fiber of current preparation adopts the design of pure silicon core, and this design does not have Ge to adulterate due to sandwich layer, so can obtain low-down rayleigh scattering coefficient, thus obtains the optical fiber attenuation reduced.
And obtain large effective area, from fibre profile design angle, main method increases sandwich layer diameter exactly and reduces fiber core layer refractive index.Because ultralow attenuating fiber adopts pure silicon core technique, so there is restriction in the method reducing the refractive index of optical fiber further; And although the core diameter of simple increase optical fiber can obtain larger useful area, the cutoff wavelength of optical fiber also can be caused to increase sharply, thus cause optical fiber to exceed index of correlation.Traditional large effective area fiber is all the sagging auxiliary design method adopted, sandwich layer is rectangular configuration, the energy distribution of such optical fiber is Gaussian distribution substantially, if designed by specific sandwich layer, energy distribution form is changed, become non-gaussian distribution, then effectively can increase fibre-optic mode field diameter, thus improve the useful area of optical fiber.
Document US2010022533 proposes a kind of design of large effective area fiber, and in order to obtain lower Rayleigh coefficient, it adopts the design of pure silicon core, does not carry out mixing altogether of germanium and fluorine in the core, and its design adopts the silicon dioxide mixing fluorine as surrounding layer.For the design of this pure silicon core, it requires that inside of optical fibre must carry out complicated viscosity coupling, and requires in drawing process, adopt extremely low speed, and the decay avoiding high-speed wire-drawing to cause the defect of inside of optical fibre to cause increases, and manufacturing process is extremely complicated.
Document CN10232392 A describes a kind of optical fiber with more large effective area.Although the useful area of the described optical fiber of this invention reaches 150 um
2above, but mix the sandwich layer design of mode altogether because of the germanium fluorine that have employed routine, and realized by the performance index sacrificing cutoff wavelength and decay.It allows cable cut-off wavelength at more than 1450nm, and in embodiment described in it, cabled cutoff wavelength even reaches more than 1800nm.In the middle of practical application, too high cutoff wavelength is difficult to ensure that optical fiber is ended in application band, just cannot ensure that light signal is single mode when transmitting.Therefore, this type optical fiber may face a series of practical problems in the application.In addition, in the embodiment cited by this invention, sink cladding outer diameter r
3minimum is 16.3um, bigger than normal equally to some extent.This invention does not have to obtain optimum combination in optical fiber parameter (e.g., useful area, cutoff wavelength etc.) and fiber manufacturing cost.
Document CN103257393A describes the low attenuation optical fiber that there is sagging layer a kind of central core position.Although the useful area of the described optical fiber of this invention reaches 150 um
2above, decay is less than or equal to 0.175dB/km.But because have employed conventional fluorine surrounding layer design, sandwich layer is still larger relative to fluorine surrounding layer viscosity, still easily defect is produced in drawing process, the further reduction of limit fibre fade performance, adopt fluorine surrounding layer structure in addition, because Fluorin doped cost is higher, and viscosity is very low, in the preparation and drawing process of preform, relative to pure silicon dioxide surrounding layer prefabricated rods, preparation technology is more complicated, technology controlling and process progress is higher, and cost is also higher, is not easy to prepare large size prefabricated rod and reduces costs.
Be below definition and the explanation of some terms related in the present invention:
Refractive index contrast refringence
: count from fiber core axis, according to the change of refractive index, that layer be defined as near axis is core layer, and outermost layer and the pure silicon dioxide layer of optical fiber are defined as optical fiber jacket.
wherein, E is and propagates relevant electric field, and r is the distance that axle center arrives between Electric Field Distribution point.
Cable cut-off wavelength λ
cc:
Define in IEC (International Electrotechnical Commission) standard 60793-1-44: cable cut-off wavelength λ
ccthat light signal have propagated 22 meters of wavelength not being re-used as single mode signal afterwards and carrying out propagating in a fiber.Need by the circle of optical fiber around a radius 14cm when testing, the circle of two radius 4cm obtains data.
Summary of the invention
Technical matters to be solved by this invention is intended to design a kind of single-mode fiber with the ultralow attenuation large effective area of lower optical fiber manufacturing cost, and its cabled cutoff wavelength is less than 1530nm, and has good bending loss, dispersion.
The technical scheme that the problem that the present invention is the above-mentioned proposition of solution adopts is: comprise sandwich layer and covering, it is characterized in that described sandwich layer outwards comprises sagging sandwich layer and outer sandwich layer from center, described covering comprises inner cladding from inside to outside, sink inner cladding, auxiliary surrounding layer and surrounding layer, wherein, described sagging core radius R
1be 1.5 ~ 4 μm, refractive index contrast
for-0.10% ~ 0.02%, described outer core radius R
2be 4.5 ~ 6.5 μm, refractive index contrast
for-0.08% ~ 0.10%, described inner cladding diameter R
3be 9 ~ 15 μm, refractive index contrast
for-0.25% ~-0.1%, described sagging inner cladding diameter R
4be 12 ~ 20 μm, refractive index contrast
for-0.6% ~-0.25%, described auxiliary inner cladding diameter R
5be 35 ~ 50 μm, refractive index contrast
for-0.45% ~-0.15%, described surrounding layer is pure silicon dioxide glassy layer.
By such scheme, described surrounding layer radius R
6it is 62.5 μm.
By such scheme, described sagging sandwich layer is the silica glass layer that germanium fluorine is mixed altogether, and wherein the doping contribution amount of germanium is 0.02% ~ 0.10%
By such scheme, described optical fiber is 110 ~ 150 μm at the useful area of 1550nm wavelength
2.
By such scheme, the cabled cutoff wavelength of described optical fiber is equal to or less than 1530nm.
By such scheme, described optical fiber is equal to or less than 0.180dB/km in the attenuation at wavelength 1550nm place; 0.170dB/km is equal to or less than under optimum condition.
By such scheme, described optical fiber is equal to or less than 5dB/km at the microbending loss at wavelength 1700nm place.
Beneficial effect of the present invention is: 1, adopt the sandwich layer design of mixing germanium, reasonably devises the viscosity coupling of inside of optical fibre, reduces defect in fiber preparation, reduce the attenuation coefficient of optical fiber; 2, the structure adopting central core to sink, makes inside of optical fibre energy distribution become non-gaussian distribution from Gaussian distribution, thus on the basis ensureing fiber cut off wavelength and dispersion parameters, effectively adds the useful area of optical fiber; 3, devise rational Fluorin doped to sink structure, and by the appropriate design to each core layer section of optical fiber, optical fiber is had and is equal to or greater than 110 μm
2useful area, under better parameter area, can reach and be equal to or greater than 130 μm
2useful area; 4, the comprehensive performance parameter such as cutoff wavelength of the present invention, bending loss, dispersion is good at application band, enough little cabled cutoff wavelength, to ensure the single mode of this type optical fiber light signal in C-band transmission application, wider sagging cladding structure, has good improved action to the bending loss of optical fiber; 5, outermost surrounding layer structure have employed the design of pure silicon dioxide, reduces Fluorin doped glass proportion in a fiber, thus reduces fiber manufacturing production cost.
Accompanying drawing explanation
The refractive index profile structure distribution figure of Fig. 1 one embodiment of the invention.
Embodiment
Describe the present invention below in conjunction with embodiment.
Comprise sandwich layer and covering, described sandwich layer outwards comprises sagging sandwich layer and outer sandwich layer from center, described covering comprises inner cladding from inside to outside, and sink inner cladding, and auxiliary surrounding layer and surrounding layer, wherein, described sagging core radius is R
1, refractive index contrast is
, described outer core radius is R
2, refractive index contrast is
, described inner cladding diameter is R
3, refractive index contrast is
, described sagging inner cladding diameter is R
4, refractive index contrast is
, described auxiliary inner cladding diameter is R
5, refractive index contrast is
, described surrounding layer is pure silicon dioxide glassy layer, surrounding layer radius R
6it is 62.5 μm.
Table one be classified as the refractive index profile parameter of the preferred embodiment of the invention, wherein Δ Ge is the doping of Ge in sandwich layer.The light-transfer characteristic of table two corresponding to optical fiber described in table one.
The fibre profile parameter of table one, the embodiment of the present invention
The optical fiber parameter of table two, the embodiment of the present invention
Claims (7)
1. the single-mode fiber of a ultralow attenuation large effective area, comprise sandwich layer and covering, it is characterized in that comprising sandwich layer and covering, it is characterized in that described sandwich layer outwards comprises sagging sandwich layer and outer sandwich layer from center, described covering comprises inner cladding from inside to outside, and sink inner cladding, auxiliary surrounding layer and surrounding layer, wherein, described sagging core radius R
1be 1.5 ~ 4 μm, refractive index contrast is-0.10% ~ 0.02%, described outer core radius R
2be 4.5 ~ 6.5 μm, refractive index contrast is-0.08% ~ 0.10%, described inner cladding diameter R
3be 9 ~ 15 μm, refractive index contrast is-0.25% ~-0.1%, described sagging inner cladding diameter R
4be 12 ~ 20 μm, refractive index contrast is-0.6% ~-0.25%, described auxiliary inner cladding diameter R
5be 35 ~ 50 μm, refractive index contrast is-0.45% ~-0.15%, and described surrounding layer is pure silicon dioxide glassy layer.
2., by the single-mode fiber of ultralow attenuation large effective area according to claim 1, it is characterized in that described surrounding layer radius R
6it is 62.5 μm.
3., by the single-mode fiber of the ultralow attenuation large effective area described in claim 1 or 2, it is characterized in that described sagging sandwich layer is the silica glass layer that germanium fluorine is mixed altogether, wherein the doping contribution amount of germanium is 0.02% ~ 0.10%.
4., by the single-mode fiber of the ultralow attenuation large effective area described in claim 1 or 2, it is characterized in that described optical fiber is 110 ~ 150 μm at the useful area of 1550nm wavelength
2.
5., by the single-mode fiber of the ultralow attenuation large effective area described in claim 1 or 2, it is characterized in that the cabled cutoff wavelength of described optical fiber is equal to or less than 1530nm.
6., by the single-mode fiber of the ultralow attenuation large effective area described in claim 1 or 2, it is characterized in that described optical fiber is equal to or less than 0.180dB/km in the attenuation at wavelength 1550nm place; 0.170dB/km is equal to or less than under optimum condition.
7., by the single-mode fiber of the ultralow attenuation large effective area described in claim 1 or 2, it is characterized in that described optical fiber is equal to or less than 5dB/km at the microbending loss at wavelength 1700nm place.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749691A (en) * | 2015-04-28 | 2015-07-01 | 长飞光纤光缆股份有限公司 | Bent insensitive single-mode fiber with ultralow attenuation |
| CN104765098A (en) * | 2015-04-28 | 2015-07-08 | 长飞光纤光缆股份有限公司 | Single mode fiber with low damping coefficient |
| CN104777551A (en) * | 2015-04-28 | 2015-07-15 | 长飞光纤光缆股份有限公司 | Low-attenuation and large-effective-area single-mode optical fiber |
| CN104777553A (en) * | 2015-04-28 | 2015-07-15 | 长飞光纤光缆股份有限公司 | Ultralow attenuation single mode fiber |
| CN106338793A (en) * | 2016-10-20 | 2017-01-18 | 长飞光纤光缆股份有限公司 | Few-mode fiber |
| CN108469648A (en) * | 2018-05-14 | 2018-08-31 | 烽火通信科技股份有限公司 | A kind of ultra-low loss large-effective area single mode fiber and its manufacturing method |
| CN108680990A (en) * | 2018-04-25 | 2018-10-19 | 烽火通信科技股份有限公司 | A kind of low crosstalk orbital angular momentum Transmission Fibers and its manufacturing method |
| CN109683233A (en) * | 2019-02-26 | 2019-04-26 | 长飞光纤光缆股份有限公司 | A kind of single mode optical fiber with ultralow attenuation large effective area |
| CN110431472A (en) * | 2017-01-24 | 2019-11-08 | 康宁股份有限公司 | Optical fiber and optical system including the optical fiber |
| CN110794509A (en) * | 2019-09-29 | 2020-02-14 | 法尔胜泓昇集团有限公司 | Single-mode optical fiber and preparation method thereof |
| WO2020177355A1 (en) * | 2019-03-01 | 2020-09-10 | 江苏永鼎股份有限公司 | Single-mode optical fiber having ultra-low loss and large effective area and preparation method therefor |
| CN116880003A (en) * | 2023-09-06 | 2023-10-13 | 江苏亨通光纤科技有限公司 | Anti-radiation ultra-low loss single mode fiber with double-mesa waveguide guide structure |
| WO2023240880A1 (en) * | 2022-06-15 | 2023-12-21 | 烽火通信科技股份有限公司 | Multiband attenuation flattened fiber |
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Cited By (23)
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|---|---|---|---|---|
| US10018779B2 (en) | 2015-04-28 | 2018-07-10 | Yangtze Optical Fibre And Cable Joint Stock Limited Company | Bending-insensitive single-mode fiber with ultra low attenuation |
| CN104749691A (en) * | 2015-04-28 | 2015-07-01 | 长飞光纤光缆股份有限公司 | Bent insensitive single-mode fiber with ultralow attenuation |
| CN104777553A (en) * | 2015-04-28 | 2015-07-15 | 长飞光纤光缆股份有限公司 | Ultralow attenuation single mode fiber |
| CN104777553B (en) * | 2015-04-28 | 2017-12-29 | 长飞光纤光缆股份有限公司 | A kind of ultralow decay single-mode fiber |
| CN104765098B (en) * | 2015-04-28 | 2018-03-16 | 长飞光纤光缆股份有限公司 | A kind of single-mode fiber having compared with lower attenuation coefficient |
| CN104777551B (en) * | 2015-04-28 | 2018-03-16 | 长飞光纤光缆股份有限公司 | A kind of single-mode fiber of low attenuation large effective area |
| EP3290972A4 (en) * | 2015-04-28 | 2018-04-04 | Yangtze Optical Fibre and Cable Joint Stock Limited Company | Ultralow attenuation single mode optical fiber |
| CN104765098A (en) * | 2015-04-28 | 2015-07-08 | 长飞光纤光缆股份有限公司 | Single mode fiber with low damping coefficient |
| CN104777551A (en) * | 2015-04-28 | 2015-07-15 | 长飞光纤光缆股份有限公司 | Low-attenuation and large-effective-area single-mode optical fiber |
| US10514495B2 (en) | 2015-04-28 | 2019-12-24 | Yangtze Optical Fibre And Cable Joint Stock Limited Company | Single-mode fiber with ultra low attenuation |
| CN104749691B (en) * | 2015-04-28 | 2018-05-01 | 长飞光纤光缆股份有限公司 | A kind of ultralow attenuation bend-insensitive single-mode optical fiber |
| CN106338793A (en) * | 2016-10-20 | 2017-01-18 | 长飞光纤光缆股份有限公司 | Few-mode fiber |
| CN110431472A (en) * | 2017-01-24 | 2019-11-08 | 康宁股份有限公司 | Optical fiber and optical system including the optical fiber |
| CN108680990A (en) * | 2018-04-25 | 2018-10-19 | 烽火通信科技股份有限公司 | A kind of low crosstalk orbital angular momentum Transmission Fibers and its manufacturing method |
| CN108469648A (en) * | 2018-05-14 | 2018-08-31 | 烽火通信科技股份有限公司 | A kind of ultra-low loss large-effective area single mode fiber and its manufacturing method |
| EP3715923A4 (en) * | 2018-05-14 | 2021-04-14 | Fiberhome Telecommunication Technologies Co., Ltd. | Single-mode optical fiber with ultralow loss and large effective area and manufacturing method therefor |
| CN109683233A (en) * | 2019-02-26 | 2019-04-26 | 长飞光纤光缆股份有限公司 | A kind of single mode optical fiber with ultralow attenuation large effective area |
| WO2020177355A1 (en) * | 2019-03-01 | 2020-09-10 | 江苏永鼎股份有限公司 | Single-mode optical fiber having ultra-low loss and large effective area and preparation method therefor |
| CN110794509A (en) * | 2019-09-29 | 2020-02-14 | 法尔胜泓昇集团有限公司 | Single-mode optical fiber and preparation method thereof |
| CN110794509B (en) * | 2019-09-29 | 2020-09-11 | 法尔胜泓昇集团有限公司 | Single-mode optical fiber and preparation method thereof |
| WO2023240880A1 (en) * | 2022-06-15 | 2023-12-21 | 烽火通信科技股份有限公司 | Multiband attenuation flattened fiber |
| CN116880003A (en) * | 2023-09-06 | 2023-10-13 | 江苏亨通光纤科技有限公司 | Anti-radiation ultra-low loss single mode fiber with double-mesa waveguide guide structure |
| CN116880003B (en) * | 2023-09-06 | 2023-12-15 | 江苏亨通光纤科技有限公司 | Anti-radiation ultra-low loss single mode fiber with double-mesa waveguide guide structure |
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