CN104216044A - Low-attenuation bending insensitive single mode fiber - Google Patents
Low-attenuation bending insensitive single mode fiber Download PDFInfo
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Abstract
The invention relates to a low-attenuation bending insensitive single mode fiber for an optical communication transmission system. The low-attenuation bending insensitive single mode fiber comprises a fiber core layer, a sunk inner wrapping layer, an inner wrapping layer, a sunk outer wrapping layer and a pure silicon dioxide glass outer wrapping layer. The low-attenuation bending insensitive single mode fiber is characterized in that the fiber core layer is composed of a first core layer, a second core layer and a third core layer with the refractive indexes ranging from high to low from inside to outside. The radius R1 of the first core layer is 2.5-3.3 microns, the relative refractive index delta 1 is 0.25-0.38%; the radius R2 of the second core layer is 4-5 microns, the relative refractive index delta 2 is 0.15-0.25%; the radius R3 of the third core layer is 5.3-6.3 microns, and the relative refractive index delta 3 is -0.03-0.15%. A core wrapping layer achieves better combination and unity of low attenuation, a large effective area and the bending property, the fiber has the attenuation resistance far better than a conventional G.653.D fiber, the cost of constructing correlated base stations and other system devices is reduced in main line transmission, and the fiber has better macroscopic bending properties than the conventional G.653.D fiber so as to meet the harsher wiring environment or the FTTx using environment.
Description
Technical field
The present invention relates to a kind of low decay bend-insensitive single-mode optical fiber for optical communication transmission system, this optical fiber has lower attenuation, outstanding bend-insensitive characteristic, and mode field diameter compatibility G.652.D standard, belong to technical field of photo communication.
Background technology
Because it has, capacity is large, long transmission distance, transmission speed are fast, economic dispatch feature in optical fiber communication, has been widely used in long distance line net to Metropolitan Area Network (MAN) and Access Network.The development of Fibre Optical Communication Technology is all so that transfer rate, larger capacity and farther transmission range, for target, constantly promote and improve the performance index of optical fiber and the communication technology of optical fiber faster all the time.Particularly in recent years, along with the explosive growth of IP operation amount, communication network is just starting to stride forward to the direction of sustainable development of future generation, and constructs the physical basis that the fiber infrastructure with huge transmission capacity distance product is next generation network.In order to meet the development need of optical fiber telecommunications system, the related performance indicators as the optical fiber of Networks of Fiber Communications transmission medium also requires further improvement.
The attenuation coefficient of optical fiber is one of most important performance index of optical fiber, determines the repeater span of optical fiber communication to a great extent.The attenuation coefficient of optical fiber is less, then its light signal carried can transmission range far away, and under same transmission range, the attenuated optical signal amplitude that it carries is less.Reduction attenuation coefficient effectively can improve the Optical Signal To Noise Ratio OSNR in optical fiber communication, the transmission quality of further raising system and transmission range.In the optical fiber communication of long distance, light signal completes transmission by relay station, if the attenuation coefficient of optical fiber is less, the unrepeatered transmission distance of light signal is far away, so just can increase the distance between relay station, thus greatly reduce the setting of relay station, cut operating costs.Therefore, no matter the attenuation coefficient reducing optical fiber is from optimization system structure or cuts operating costs aspect, all has very important significance.And on the other hand, along with the development of FTTX in recent years, the performance of original G.652 optical fiber has been difficult to meet user's requirement, actual application environment requires that optical fiber has certain bending resistance, so on the basis of G.652 optical fiber, have developed bend-insensitive single-mode optical fiber---the G.657 optical fiber of a new generation, wherein comprise can compatible G.652 standard G.657.A type optical fiber and can not the G.657.B type optical fiber of compatible G.652 standard.G.657.A type optical fiber and G.652.D optical fiber have good compatibility, and it has better bending resistance relative to common G.652.D optical fiber, and therefore it is considered to most possibly substitute one of product of existing G.652 optical fiber.So invention is a kind of and G.652 operating such, and there is single-mode fiber of new generation that lower decay, relatively large mode field diameter also have a bend-insensitive characteristic simultaneously becomes a study hotspot in telecommunication optical fiber field.
For single-mode fiber, the attenuation coefficient of optical fiber can represent with formula (1):
(1)
Wherein R is rayleigh scattering coefficient,
represent infrared absorption respectively, defect decays, and OH absorbs, and uv absorption.In fiber optic materials, because certain unevenness much smaller than wavelength causes the scattering of light to form the scattering loss of optical fiber.Wherein Rayleigh scattering is one of three kinds of scattering mechanisms, is linear scattering (not producing the change of frequency).The feature of Rayleigh scattering is inversely proportional to the biquadratic of wavelength, and the loss caused by it is relevant with concentration with the kind of dopant material, and wherein the defect and impurity of parameter B reaction fiber preparation pollutes relevant.
In the manufacture process of preform, following several method generally can be adopted to reduce optical fiber attenuation.Such as, adopt more highly purified starting material, improve the probability of production environment and the introducing of equipment sealing property reduction introduced contaminants, as namely patent CN201110178833.3 adopts the bubble-tight method improved in prefabricated fiber rod depositing process, reduce the introducing of introduced contaminants.Or adopt the prefabricated rods manufacturing process of larger external diameter, reduced the overall attenuation of optical fiber by the dilution effect of large size prefabricated rod.In addition, in optical fiber manufacturing processes, the coating processes of bare fibre surface coating is also the key factor affecting optical fiber attenuation performance.But, in the cost no matter theoretically or in actual fiber preparation and technology controlling and process, reduce the doping of optical fiber and the section optimizing optical fiber is the simplest and effectively reduces the method for optical fiber attenuation.In general, the concentration of dopant material is lower, then the loss caused by Rayleigh scattering is less.In traditional single-mode fiber, in order to ensure the total reflection in optical fiber, must ensure enough refractive index differences between sandwich layer and inner cladding, the relative index of refraction of sandwich layer is far longer than the inner cladding of optical fiber; In order to ensure such design, the doping that a large amount of Ge or Ge/F mixes form altogether must be carried out in the core, and in traditional fibre profile design, laser energy becomes Gaussian distribution formal distribution in fibre profile, optical-fiber laser energy has about 70% to propagate in the sandwich layer part that doping is relatively more, and namely the Laser Transmission of high-energy-density concentrates in the larger high-concentration dopant sandwich layer of Rayleigh coefficient and propagates.If designed by rational optical cross-sectional, design a kind of section of energy non-gaussian distribution, reduce the loss of energy in high-concentration dopant sandwich layer, just significantly can reduce the fade performance of optical fiber.
On the other hand, larger useful area can cause the obvious increase of the bending loss of optical fiber (comprising macrobending loss and the microbending loss of optical fiber), particularly in long wavelength region.In the stranding, actual process of laying and use of optical fiber, if the bending resistance of optical fiber can meet the demands, then the loss of signal will become large, and the transmission quality of signal cannot be guaranteed.So while optical fiber has large effective area and low fading characteristics, ensureing macrobend and the microbend performance of optical fiber, is a difficult problem of optical fiber Design and manufacture.
At present, what the bending resistance employing of optimization single-mode fiber was more is following three kinds of methods: one is the MAC value (i.e. the ratio of fibre-optic mode field diameter and cutoff wavelength) adjusting optical fiber.MAC value is less, then the bending resistance of optical fiber is better.But, the reduction of mode field diameter can cause the reduction of useful area, and easily cause more defect when wire drawing and increase decay, the cutoff wavelength of optical fiber must be less than operation wavelength simultaneously, to ensure the operating characteristic of single mode, so improved the limited space of the bending property of optical fiber by the MAC value changing optical fiber.Two is that the double-clad structure that can be sagging covering by inner cladding improves bending property, but the covering that sink likely causes " leakage of LP01 mould " phenomenon of optical fiber.Three is increase by the inner cladding at optical fiber the sagging covering (trench) that one deck is similar to groove outward, while ensureing larger mode field diameter, improves the bending property of optical fiber.The method obtains general application, as Chinese patent CN101523259B, CN103345017A, US Patent No. 7450807 and European patent EP 1978383 etc. in bend-insensitive single-mode optical fiber (namely G.657 optical fiber).But in these routines G.657 Section Design of optical fiber and manufacture method, sandwich layer is that Ge/F mixes altogether, and in order to obtain optimum macrobend performance, the relative index of refraction of sandwich layer is generally all greater than 0.35%, namely sandwich layer Ge adulterates more, therefore can bring larger Rayleigh scattering thus the decay of increase optical fiber.
Summary of the invention
Introduce content of the present invention for convenience, definitional part term:
Technical matters to be solved by this invention is that the deficiency overcoming the existence of above-mentioned prior art provides a kind of low attenuation bend-insensitive single-mode optical fiber, it can reduce optical fiber attenuation further, improve bending resistance (macrobend performance is better than G.657.A1 standard) increase mould field, makes it to mate completely with G.652.D optical fiber.
Introduce summary of the invention for convenience, be defined as follows term:
Prefabricated rods: the radial refractive index distribution be made up of sandwich layer and covering meets glass bar or the assembly that optical fiber designing requirement directly can be drawn into designed optical fiber;
Plug: the solid glass prefabricated component containing sandwich layer and part of clad;
Radius: the distance between this layer of outer boundary and central point;
Refractive index profile: optical fiber or the relation between preform (comprising plug) glass refraction and its radius;
Refractive index contrast:
n
iand n
0be respectively each corresponding optical fiber each several part
Refractive index and the refractive index of pure silicon dioxide glass;
The contribution amount of fluorine (F): mix the relative index of refraction difference (Δ F) of fluorine (F) quartz glass relative to pure quartz glass, represents with this and mixes fluorine (F) amount;
The contribution amount of germanium (Ge): mix the relative index of refraction difference (Δ Ge) of germanium (Ge) quartz glass relative to pure quartz glass, represents with this and mixes germanium (Ge) amount;
Bushing pipe (Tube): the substrate tube of tubulose, meets the pure quartz glass tube of certain geometry requirement;
OVD technique: the quartz glass preparing desired thickness by Outside Vapor deposition and sintering process;
VAD technique: the quartz glass preparing desired thickness with axial vapor deposition and sintering process;
APVD over cladding process: with high-frequency plasma flame, natural or synthetic quartz powder are founded the SiO preparing desired thickness in mandrel surface
2glass;
Bare fibre: refer to the glass fiber not containing coat in optical fiber.
The technical scheme that the problem that the present invention is the above-mentioned proposition of solution adopts is:
Include core layer, sagging inner cladding, inner cladding, sink surrounding layer and pure silicon dioxide glass overclad, it is characterized in that core layer is from inside to outside made up of refractive index the first sandwich layer from high to low, the second sandwich layer and the 3rd sandwich layer, the first described core radius R1 is 2.5 μm ~ 3.3 μm, and refractive index contrast Δ 1 is 0.25% ~ 0.38%; The second described core radius R2 is 4 μm ~ 5 μm, and refractive index contrast Δ 2 is 0.15% ~ 0.25%; The 3rd described core radius R3 is 5.3 μm ~ 6.3 μm, and refractive index contrast Δ 3 is-0.03% ~ 0.15%.
By such scheme, described sagging inner cladding diameter R4 is 7 μm ~ 8 μm, and refractive index contrast Δ 4 is-0.15% ~ 0%; Described inner cladding is pure silicon dioxide glassy layer, and R5 is 8 μm ~ 10 μm.
By such scheme, described sagging surrounding layer is the silica glass layer of F doping, and R6 is 12 μm ~ 18 μm; Δ 6 is-0.35% ~-0.20%; Surrounding layer is pure silicon dioxide glassy layer.
By such scheme, described core layer is the silica glass layer that germanium fluorine is mixed altogether, and wherein the contribution amount of fluorine is-0.04% ~-0.10%.
By such scheme, optical fiber is 8.4 ~ 9.6 microns in the mode field diameter at 1310nm wavelength place.
By such scheme, optical fiber is less than or equal to 0.335 dB/km at the attenuation coefficient at 1310nm wavelength place, be less than or equal to 0.324dB/km under optimum condition, be less than or equal to 0.195dB/km at the attenuation coefficient at 1550nm wavelength place, under optimum condition, be less than or equal to 0.184dB/km.
By such scheme, optical fiber has the cable cut-off wavelength being less than or equal to 1260nm.
By such scheme, optical fiber, at 1550nm wavelength place, is less than or equal to 0.15dB for around 15 millimeters of bending radius around the bending added losses of 10 circles; 0.5dB is less than or equal to around the bending added losses of 1 circle for around 10 millimeters of bending radius.In optimal case situation, 1550nm wavelength place, is less than or equal to 0.05dB for around 15 millimeters of bending radius around the bending added losses of 10 circles; 0.15dB is less than or equal to around the bending added losses of 1 circle for around 10 millimeters of bending radius.
Beneficial effect of the present invention is: 1. three core structures proposing the change of a kind of core layer refractive index gradient, make the germanium amount of mixing of core layer reduce, thus reduces the attenuation coefficient of optical fiber by reducing Rayleigh scattering; 2. doped with fluorine and germanium simultaneously in core layer of the present invention and covering, three core structure design changed by core layer refractive index gradient, make three sandwich layers and the viscosity of sagging covering on each interface more close, may be buffered in optical fiber surface in drawing process produce tension stress and affect the compressive stress of fiber core layer region formation, reduce the attenuation coefficient of optical fiber further by reducing stress, thus realize low decay, large effective area, bending resistance and combine better and unify; 3. relative to routine optical fiber attenuation G.652.D (0.34 dB/km@1310nm; 0.20 dB/km@1550nm), optical fiber in the present invention has the fade performance being far superior to conventional G.652.D optical fiber, thus can in primary transmission, reduce the cost building associated base stations and other system equipments, and relatively conventional G.652.D optical fiber has more excellent macrobending performance, to meet harsher wiring environment or FTTx environment for use.
Accompanying drawing explanation
Fig. 1 is the Refractive Index Profile of Optical schematic diagram of one embodiment of the invention.
Embodiment
To provide detailed embodiment below, the invention will be further described.
Optical fiber comprises core layer and covering, core layer is from inside to outside made up of refractive index the first sandwich layer from high to low, the second sandwich layer and the 3rd sandwich layer, covering includes sagging inner cladding, inner cladding, sink surrounding layer and pure silicon dioxide glass overclad, core layer and sagging covering are made up of the quartz glass being mixed with fluorine and other adulterants, be all vapour deposition process to obtain, surrounding layer is pure silicon dioxide glassy layer prepared by OVD technique, and diameter is 125 μm.
According to the technical scheme of above-mentioned single-mode fiber, design at the parameters of the scope interior focusing fibre of its defined, designing requirement according to optical fiber manufactures plug by plug manufacturing process such as gas-phase depositions, is then completed the manufacture of whole preform by over cladding process such as OVD.The major parameter of the refractive index profile structure and material composition of prepared optical fiber is as shown in table 1, and the Specifeca tion speeification of prepared optical fiber is as shown in table 2.
Table 1: the structure and material composition of optical fiber
Table 2: the Specifeca tion speeification of optical fiber
Claims (8)
1. one kind low attenuation bend-insensitive single-mode optical fiber, include core layer, sagging inner cladding, inner cladding, sink surrounding layer and pure silicon dioxide glass overclad, it is characterized in that core layer is from inside to outside made up of refractive index the first sandwich layer from high to low, the second sandwich layer and the 3rd sandwich layer, the first described core radius R1 is 2.5 μm ~ 3.3 μm, and refractive index contrast Δ 1 is 0.25% ~ 0.38%; The second described core radius R2 is 4 μm ~ 5 μm, and refractive index contrast Δ 2 is 0.15% ~ 0.25%; The 3rd described core radius R3 is 5.3 μm ~ 6.3 μm, and refractive index contrast Δ 3 is-0.03% ~ 0.15%.
2., by low attenuation bend-insensitive single-mode optical fiber according to claim 1, it is characterized in that described sagging inner cladding diameter R4 is 7 μm ~ 8 μm, refractive index contrast Δ 4 is-0.15% ~ 0%; Described inner cladding is pure silicon dioxide glassy layer, and R5 is 8 μm ~ 10 μm.
3., by low attenuation bend-insensitive single-mode optical fiber according to claim 2, it is characterized in that described sagging surrounding layer is the silica glass layer of F doping, R6 is 12 μm ~ 18 μm; Δ 6 is-0.35% ~-0.20%; Surrounding layer is pure silicon dioxide glassy layer.
4., by low attenuation bend-insensitive single-mode optical fiber described in claim 1 or 2, it is characterized in that described core layer is the silica glass layer that germanium fluorine is mixed altogether, wherein the contribution amount of fluorine is-0.05% ~-0.12%.
5., by the low attenuation bend-insensitive single-mode optical fiber described in claim 1 or 2, it is characterized in that optical fiber is 8.4 ~ 9.6 microns in the mode field diameter at 1310nm wavelength place.
6. by the low attenuation bend-insensitive single-mode optical fiber described in claim 1 or 2, it is characterized in that optical fiber is less than or equal to 0.335 dB/km at the attenuation coefficient at 1310nm wavelength place, 0.324dB/km is less than or equal under optimum condition, be less than or equal to 0.195dB/km at the attenuation coefficient at 1550nm wavelength place, under optimum condition, be less than or equal to 0.184dB/km.
7., by the low attenuation bend-insensitive single-mode optical fiber described in claim 1 or 2, it is characterized in that optical fiber has the cable cut-off wavelength being less than or equal to 1260nm.
8. by the low attenuation bend-insensitive single-mode optical fiber described in claim 1 or 2, it is characterized in that optical fiber is at 1550nm wavelength place, be less than or equal to 0.15dB for around 15 millimeters of bending radius around the bending added losses of 10 circles; 0.5dB is less than or equal to around the bending added losses of 1 circle for around 10 millimeters of bending radius.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698534A (en) * | 2015-03-31 | 2015-06-10 | 长飞光纤光缆股份有限公司 | Low-attenuation few-mode fiber |
| CN104714273A (en) * | 2015-03-31 | 2015-06-17 | 长飞光纤光缆股份有限公司 | Low-attenuation and few-mode fiber |
| CN104880766A (en) * | 2015-06-25 | 2015-09-02 | 长飞光纤光缆股份有限公司 | Ultra-low attenuation single-mode optical fiber |
| CN104898201A (en) * | 2015-06-25 | 2015-09-09 | 长飞光纤光缆股份有限公司 | Ultralow attenuation large-effective-area single-mode optical fiber |
| CN106468803A (en) * | 2016-08-30 | 2017-03-01 | 武汉长盈通光电技术有限公司 | A kind of bend-insensitive single-mode optical fiber |
| CN106772786A (en) * | 2017-01-17 | 2017-05-31 | 烽火通信科技股份有限公司 | A kind of less fundamental mode optical fibre for supporting multiple linear polarization patterns and orbital angular momentum pattern |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4358073B2 (en) * | 2004-09-07 | 2009-11-04 | 株式会社フジクラ | Low bending loss trench type multimode fiber |
| CN101738681A (en) * | 2010-01-20 | 2010-06-16 | 长飞光纤光缆有限公司 | High bandwidth multimode fiber |
| CN102540327A (en) * | 2012-01-10 | 2012-07-04 | 长飞光纤光缆有限公司 | Bent insensitive single-mode optical fiber |
| CN102768383A (en) * | 2012-08-01 | 2012-11-07 | 长飞光纤光缆有限公司 | Single mode fiber with large effective area |
| CN102944910A (en) * | 2012-10-30 | 2013-02-27 | 长飞光纤光缆有限公司 | Single-mode fiber with larger effective area |
| CN103941334A (en) * | 2014-04-21 | 2014-07-23 | 长飞光纤光缆股份有限公司 | Low-attenuation single mode fiber |
-
2014
- 2014-09-17 CN CN201410473879.1A patent/CN104216044B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4358073B2 (en) * | 2004-09-07 | 2009-11-04 | 株式会社フジクラ | Low bending loss trench type multimode fiber |
| CN101738681A (en) * | 2010-01-20 | 2010-06-16 | 长飞光纤光缆有限公司 | High bandwidth multimode fiber |
| CN102540327A (en) * | 2012-01-10 | 2012-07-04 | 长飞光纤光缆有限公司 | Bent insensitive single-mode optical fiber |
| CN102768383A (en) * | 2012-08-01 | 2012-11-07 | 长飞光纤光缆有限公司 | Single mode fiber with large effective area |
| CN102944910A (en) * | 2012-10-30 | 2013-02-27 | 长飞光纤光缆有限公司 | Single-mode fiber with larger effective area |
| CN103941334A (en) * | 2014-04-21 | 2014-07-23 | 长飞光纤光缆股份有限公司 | Low-attenuation single mode fiber |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698534A (en) * | 2015-03-31 | 2015-06-10 | 长飞光纤光缆股份有限公司 | Low-attenuation few-mode fiber |
| CN104714273A (en) * | 2015-03-31 | 2015-06-17 | 长飞光纤光缆股份有限公司 | Low-attenuation and few-mode fiber |
| CN104698534B (en) * | 2015-03-31 | 2017-11-17 | 长飞光纤光缆股份有限公司 | A kind of low decay less fundamental mode optical fibre |
| CN104714273B (en) * | 2015-03-31 | 2019-04-16 | 长飞光纤光缆股份有限公司 | Low decaying less fundamental mode optical fibre |
| CN104880766A (en) * | 2015-06-25 | 2015-09-02 | 长飞光纤光缆股份有限公司 | Ultra-low attenuation single-mode optical fiber |
| CN104898201A (en) * | 2015-06-25 | 2015-09-09 | 长飞光纤光缆股份有限公司 | Ultralow attenuation large-effective-area single-mode optical fiber |
| CN104898201B (en) * | 2015-06-25 | 2017-12-08 | 长飞光纤光缆股份有限公司 | A kind of single-mode fiber of ultralow attenuation large effective area |
| CN106468803A (en) * | 2016-08-30 | 2017-03-01 | 武汉长盈通光电技术有限公司 | A kind of bend-insensitive single-mode optical fiber |
| CN106772786A (en) * | 2017-01-17 | 2017-05-31 | 烽火通信科技股份有限公司 | A kind of less fundamental mode optical fibre for supporting multiple linear polarization patterns and orbital angular momentum pattern |
| CN106772786B (en) * | 2017-01-17 | 2019-11-26 | 烽火通信科技股份有限公司 | A kind of less fundamental mode optical fibre for supporting multiple linear polarization modes and orbital angular momentum mode |
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Effective date of registration: 20200117 Address after: 515041 No. 15 east science and technology road, hi tech Zone, Guangdong, Shantou Patentee after: Shantou Hi-Tech Zone Austrian Star Communications Equipment Co., Ltd. Address before: 430073 Hubei city of Wuhan province Wuchang two Guanshan Road No. four Patentee before: Yangtze Optical Fibre and Cable Co., Ltd |