CN110456446A - A kind of single mode optical fiber - Google Patents
A kind of single mode optical fiber Download PDFInfo
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- CN110456446A CN110456446A CN201910762943.0A CN201910762943A CN110456446A CN 110456446 A CN110456446 A CN 110456446A CN 201910762943 A CN201910762943 A CN 201910762943A CN 110456446 A CN110456446 A CN 110456446A
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- optical fiber
- inner cladding
- index difference
- covering
- single mode
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 89
- 238000005452 bending Methods 0.000 claims abstract description 61
- 238000005253 cladding Methods 0.000 claims abstract description 48
- 238000007665 sagging Methods 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 33
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 16
- 229910052731 fluorine Inorganic materials 0.000 claims description 16
- 239000011737 fluorine Substances 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- AWEFOOVAPQKHBW-UHFFFAOYSA-N [Cl].[Ge] Chemical compound [Cl].[Ge] AWEFOOVAPQKHBW-UHFFFAOYSA-N 0.000 claims description 5
- 230000035772 mutation Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 5
- 241000790917 Dioxys <bee> Species 0.000 abstract 1
- 229910003978 SiClx Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 description 21
- 239000000835 fiber Substances 0.000 description 14
- 238000013461 design Methods 0.000 description 10
- 229910052732 germanium Inorganic materials 0.000 description 8
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- VDGJOQCBCPGFFD-UHFFFAOYSA-N oxygen(2-) silicon(4+) titanium(4+) Chemical compound [Si+4].[O-2].[O-2].[Ti+4] VDGJOQCBCPGFFD-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- 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
- G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
- G02B6/02009—Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres
-
- 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
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0283—Graded index region external to the central core segment, e.g. sloping layer or triangular or trapezoidal layer
-
- 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
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03638—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Glass Compositions (AREA)
Abstract
The present invention relates to a kind of low bend loss single mode optical fibers, it include sandwich layer and covering, the covering includes inner cladding from the inside to the outside, sink covering and surrounding layer, it is characterized in that sandwich layer diameter 2R1 is 8.2 μm~9.4 μm, relative fefractive index difference Δ 1 is 0.360%~0.420%, inner cladding diameter 2R2 is 16.0 μm~19.0 μm, inner cladding has from inward flange to the relative fefractive index difference of outer edge gradual change, wherein maximum relative refractive index difference Δ 2max is 0.02%~0.10%, relative fefractive index difference is 0.0% at outer edge, that is, inner cladding and sagging cladding interface, the cladding diameter 2R3 that sink is 28.0 μm~35.0um, relative fefractive index difference Δ 3 is -0.40%~-0.65%, the surrounding layer is pure dioxy SiClx surrounding layer.The present invention has lower bending loss, improves the bending property of optical fiber by the reasonable disposition of refractive index profile under conditions of guaranteeing that optical fiber has biggish mode field diameter；The bending property of optical fiber meets the needs of access net and some miniaturization optical devices more than G.657.B3 standard.
Description
Technical field
The present invention relates to a kind of single mode optical fiber with low bend loss for optic communication Transmission system, the optical fiber compared with
There is low bending loss under small bending radius, belong to access net technical field of photo communication.
Background technique
With the continuous development of optical fiber transmission technique, fiber to the home and fiber to the desk are built at communication access net network
If important development direction.Optical fiber as transmission medium plays the part of vital role wherein.Due in practical FTTx light
In fine track laying and configuration process, it is often necessary to various operations are carried out to optical fiber indoors and under narrow environment, as corner is straight
The installation of angle corner, it is tediously long to handle optical fiber in the storage box increasingly minimized for Optical Fiber Winding, it is therefore desirable to which design is opened
Send out have excellent bending resistance optical fiber, with meet FTTx network laying and device miniaturization requirement, it is counter-bending G.657
In series fibre, meeting minimum bending radius is the G.657.A1 fiber optic applications of 10mm in long-range net (long-haul
networks)；G.657.A2 optical fiber meets the application under the conditions of minimum 7.5mm bending radius, is mainly used for Metropolitan Area Network (MAN)
(metro networks) and FTTH (fiber to the home)；G.657.B3 optical fiber meets the use condition under minimum 5mm bending radius,
Mainly in the use of FTTd (fiber to the desk) and all-optical network.
According to the regulation and the G.657.B3 specific use environment of optical fiber and condition of ITU-T, G.657.B3 optical fiber makes substantially
For more focusing on the macrobending performance under small-bend radius (minimum bending radius 5.0mm) in short-range communications,
Compatible G.652.D standard is not strictly required.The ITU-T of in September, 2012 is G.657 in latest revised version, and B type optical fiber is gradually to simultaneous
The direction for holding G.652 optical fiber is developed, this would be even more beneficial to the popularization and use of G.657 optical fiber.Therefore in design bend insensitive fiber
While, it is necessary to consider G.652 compatible with tradition.
By years of researches, various countries scientific research personnel has found that the mode field diameter of optical fiber and cutoff wavelength are curved to the macroscopic view of optical fiber
Song loss play a major role, MAC value can qualitatively measure the bending property of optical fiber, wherein MAC value be defined as mode field diameter with
The ratio of cutoff wavelength, MAC value is smaller, then the bending property of optical fiber is better, it is clear that reduces mode field diameter, increases optical fiber and cut
Only wavelength can achieve the purpose that reduce MAC value, to obtain preferable bending property.But fibre-optic mode field diameter is too small, then exists
Biggish connecting loss can be brought when it connect with Standard single-mode fiber, and has been restricted to launched power.Simultaneously, it is contemplated that
The multi-service feature of FTTx, it would be desirable to be transmitted using all band, cable cut-off wavelength is necessarily less than 1260nm, therefore optical fiber
Cutoff wavelength increase space it is very limited.The method raising bending property effect for relying solely on reduction optical fiber MAC value is limited,
Especially it is difficult to reduce the bending loss under small-bend radius.
Relative to common single mode optical fiber cross-section structure, another the effective method for improving fibre-optical bending performance is to use
The design of sagging inner cladding can increase the numerical aperture of optical fiber by inner cladding design of sinking in the case where not increasing sandwich layer and adulterating
Diameter (NA) can avoid decaying caused by increasing doping and increase.But the optimization design for the covering that sink, it can only change to a certain extent
Kind macrobend performance of the optical fiber under long radius.When the bending radius of optical fiber is less than or equal to 10mm, it is difficult with sagging
The method of inner cladding is prepared with the optical fiber compared with low bend loss.
Through further research, it has been found that improving the maximally efficient method of optical fiber bending resistance is using the surrounding layer knot that sink
Structure designs fibre profile.To sagging cladding structure optical fiber the study found that sink depth of the surrounding layer in fibre profile and
Width requires limitation there is also certain: the surrounding layer that sink is excessively shallow, narrow to bring good bend-insensitive performance, and mistake
Shallowly, the wide bending loss that cannot be reduced under small bending radius；It is too deep, it is wide, then may influence optical fiber cutoff wavelength and
Dispersion.In order to enable optical fiber has lower loss under small and big bending radius, the width and depth of the covering that sink
It rationally designs extremely important.
Chinese patent CN101680994A, applicant describe one kind to have small bend loss optical fiber, but does not refer to
The loss and attenuation characteristic of 5mm bending radius at 1550nm, and the relative fefractive index difference of its covering that sink -7.28 ×
10-3~-2.62 × 10-2Range, it is contemplated that its it is deeper it is sagging will cause the curved excessively high and high dispersion of wavelength of cut-off, and in light
It is easy to appear multipath crosstalk (MPI) problem in fine transmission process, will affect the compatibility of optical fiber, be unfavorable for bend insensitive fiber
Application in existing communication network.And deeper sagging covering also increases the manufacturing cost of optical fiber, is unfavorable for the type light
Fine large-scale production and application.
Chinese patent CN200710096317.X describes a kind of bend-insensitive single-mode optical fiber, is provided with two layers of packet that sink
Layer, the first sagging covering fluorine doped is deeper, and the second sagging covering fluorine doped is shallower, is provided with tundish between this two layers sagging covering
Layer.Using the structure to reduce bending loss, while the optical fiber prepared also complies with G.652 standard, but it is typically only suitable for
Use demand under 7.5mm bending radius does not provide the bending loss embodiment of 5.0mm bending radius and specific in the patent
Parameter.Simultaneously it can be seen that the radius of the intermediate cladding layer of refractive index profile is in 18um-20um, and the second of fluorine doped the sagging covering is more
Width reaches 25um-40um, and the accounting of fluorine doped layer in a fiber is significantly higher, the sagging covering of the multilayer of design and intermediate cladding layer knot
Structure is complicated, is unfavorable for its large-scale production and practical application.
Summary of the invention
The content of present invention is introduced for convenience, defines part term:
Prefabricated rods: meeting fiber design requirement by the radial refractive index distribution that sandwich layer and covering form can directly be drawn into
The glass bar or assembly of 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: the relationship between optical fiber or preform (including plug) glass refraction and its radius；
Relative fefractive index difference:niAnd n0It is respectively each right
Answer the refractive index of optical fiber each section and the refractive index of surrounding layer pure silicon dioxide glass；
The contribution amount of fluorine (F): relative index of refraction difference (Δ F) of fluorine doped (F) quartz glass relative to pure quartz glass, with
This come indicate fluorine doped (F) measure；
The contribution amount of germanium (Ge): relative index of refraction difference (Δ of germanium (Ge) quartz glass relative to pure quartz glass is mixed
Ge), measured with this to indicate to mix germanium (Ge)；
Mixing germanium can be improved the refractive index of silica, and fluorine doped can reduce the refractive index of silica；
Bushing pipe (Tube): the substrate tube of tubulose meets the pure quartz glass pipe of certain geometry requirement；
PCVD technique: the quartz glass of thickness required for being prepared with plasma activated chemical vapour deposition technique；
OVD technique: with the quartz glass of Outside Vapor deposition and sintering process preparation required thickness；
VAD technique: with the quartz glass of axial vapor deposition and sintering process preparation required thickness；
The glass part of optical fiber refers to the glass fiber that coat is free of in optical fiber.
The summation of material dispersion and waveguide dispersion that the dispersion of optical fiber refers to.
Macrobend added losses test method method with reference to specified in IEC60793-1-47.
The problem to be solved by the present invention is that proposing a kind of cross-section structure in view of the deficiency of the prior art
The single mode optical fiber of optimization, the optical fiber have lower bending loss under lesser bending radius.
The present invention be solve the problems, such as it is set forth above used by technical solution are as follows: include sandwich layer and covering, it is described
Covering includes inner cladding from the inside to the outside, sink covering and surrounding layer, and wherein inner cladding wraps sandwich layer, packet in covering wrapping of sinking
Layer, surrounding layer wrap the covering that sink, it is characterised in that the sandwich layer diameter 2R1 is 8.20 μm~9.40 μm, relative index of refraction
Poor Δ 1 is 0.360%~0.420%, and the inner cladding diameter 2R2 is 16.0 μm~19.0 μm, and inner cladding has from inner edge
Edge to the relative fefractive index difference of outer edge gradual change, wherein inward flange have maximum relative refractive index difference Δ 2max be 0.02%~
0.10%, relative fefractive index difference is 0.0% at outer edge, that is, inner cladding and sagging cladding interface, the sagging cladding diameter
2R3 is 28.0 μm~35.0 μm, and relative fefractive index difference Δ 3 is -0.40%~-0.65%, and the surrounding layer is pure titanium dioxide
Silicon surrounding layer.
It according to the above scheme, is the intersection of inner cladding and sandwich layer at the mutation of the inner cladding relative fefractive index difference.
According to the above scheme, the inner cladding is from inward flange (intersection of inner cladding and sandwich layer) to outer peripheral opposite folding
The rate difference of penetrating tapers off shape.
According to the above scheme, the sandwich layer is that germanium chlorine is co-doped with silica glass layer, and the inner cladding is also that germanium chlorine is total
Mix silica glass layer.
According to the above scheme, the sagging covering is the silica glass layer of fluorine doped.
According to the above scheme, mode field diameter of the optical fiber at 1310nm wavelength is 8.2~9.0 μm.
According to the above scheme, the optical fiber has the cable cut-off wavelength less than or equal to 1260nm.
According to the above scheme, the optical fiber has the zero-dispersion wavelength of 1300~1324nm.
According to the above scheme, the optical fiber is at 1550nm wavelength, for attached around the bending of 1 circle around 10 millimeters of bending radius
Loss is added to be less than or equal to 0.02dB；Bending added losses around 7.5 millimeters of bending radius around 1 circle are less than or equal to
0.06dB；0.10dB is less than or equal to for the bending added losses around 5.0 millimeters of bending radius around 1 circle.
According to the above scheme, the optical fiber is at 1625nm wavelength, for attached around the bending of 1 circle around 10 millimeters of bending radius
Loss is added to be less than or equal to 0.07dB；Bending added losses around 7.5 millimeters of bending radius around 1 circle are less than or equal to
0.20dB；0.30dB is less than or equal to for the bending added losses around 5.0 millimeters of bending radius around 1 circle.
The used manufacturing method of optical fiber of the present invention are as follows: the technique of VAD+PCVD+OVD combination prepares prefabricated rods.VAD method system
Standby plug includes sandwich layer and inner cladding, and PCVD method has the advantages that deep fluorine doped, is used to prepare fluorine doped casing, by VAD method system
Standby plug and the fluorine doped pipe of PCVD deposition melt and shorten bigger plug into, which includes sandwich layer, inner cladding and
Sink covering, then carries out outsourcing formation prefabricated rods to the plug shortened into is melted by OVD technique again, or the plug for melting contracting is inserted
Enter and form prefabricated rods into the hollow sleeve of pure silicon dioxide, the prefabricated rods combined are subjected to wire drawing on wire-drawer-tower
Pull out ultralow bend loss optical fiber.
The beneficial effects of the present invention are: 1. devise a kind of index distribution single mode optical fiber of inner cladding gradual change, pass through
The reasonable disposition of refractive index profile has lower bending loss under conditions of guaranteeing that optical fiber has biggish mode field diameter,
Improve the bending property of optical fiber；2. the silica glass for mixing germanium has biggish elastic optical in sandwich layer and covering mixed with germanium
Coefficient, to reduce the influence of the stress refractive index variation generated under bending state, Profile distortion is small；And the covering that sink is mixed deeply
Fluorine has minimum refractive index and minimum modulus, and can buffer stress under bending state influences sandwich layer and covering, thus effectively
The bending resistance for improving optical fiber；3. optical fiber of the invention has under the bending radius of 5mm, 7.5mm and 10.0mm
There is lower bending loss, taken into account small-bend radius and long radius use condition, meets the complicated wiring grommet of access net
The demand in border and some miniaturization optical devices；4. preferred fiber of the present invention, while meeting G.657.A/B, perfection is compatible
G.652 optical fiber；5. optical fiber of the invention completes the preparation of prefabricated rods using combined manufacturing process, in conjunction with the excellent of each technique
Point improves Refractive Index Profile of Optical precision, and the manufacture efficiency of optical fiber is high, and performance is stablized.
Detailed description of the invention
Fig. 1 is the Refractive Index Profile of Optical figure of one embodiment of the invention.
Fig. 2 is the optical fiber radial section structural schematic diagram of one embodiment of the invention.
Specific embodiment
Detailed embodiment is presented below, the invention will be further described.
Optical fiber includes sandwich layer, inner cladding, sink covering and surrounding layer.The sandwich layer diameter is 2R1, relative index of refraction
Difference is Δ 1, and the inner cladding diameter is 2R2, and inner cladding has the relative fefractive index difference to successively decrease from inward flange to outer edge,
Middle maximum relative refractive index difference is Δ 2max, and relative fefractive index difference is 0.0% at outer edge, that is, inner cladding and sagging cladding interface,
The sagging cladding diameter is 2R3, and relative fefractive index difference is Δ 3, and the surrounding layer 100 is pure silicon dioxide surrounding layer.
The sandwich layer and inner cladding is made of the silica glass layer being co-doped with doped with germanium or germanium chlorine, and the covering that sink is doped with fluorine
Silica glass layer, surrounding layer be pure silicon dioxide glassy layer.As depicted in figs. 1 and 2, wherein inner cladding doped with gradual change
Germanium, wherein surrounding layer be OVD preparation pure silicon dioxide surrounding layer, outer cladding diameter be 125 μm.
According to the technical solution of above-mentioned low bend loss single mode optical fiber, in the range of its defined to the parameter of optical fiber into
The fluorine doped pipe of row design, the plug prepared by VAD method and PCVD deposition melt shortening plug into, passes through the out workers such as OVD
Skill completes the manufactures of entire prefabricated rods.The major parameter of the refractive index profile structure of prepared optical fiber is as shown in table 1, prepared
The part Specifeca tion speeification of optical fiber is as shown in table 2.Wherein 1-6 is the embodiment of the present invention, and 7-8 is comparative example (interior packet
Layer refringence is constant).It can find that optical fiber of the invention also has more excellent bending property under biggish mode field diameter.
Table 1: the refractive index profile structural parameters of optical fiber
Table 2: the Specifeca tion speeification of optical fiber
Claims (10)
- It include sandwich layer and covering 1. a kind of single mode optical fiber, the covering includes inner cladding from the inside to the outside, sink covering and outer Covering, wherein inner cladding wraps sandwich layer, and the covering that sink wraps inner cladding, and surrounding layer wraps the covering that sink, it is characterised in that described Sandwich layer diameter 2R1 be 8.2 μm~9.4 μm, relative fefractive index difference Δ 1 be 0.360%~0.420%, the inner cladding is straight Diameter 2R2 is 16.0 μm~19.0 μm, and inner cladding has from inward flange to the relative fefractive index difference of outer edge gradual change, wherein maximum phase Refractive index difference Δ 2max is 0.02%~0.10%, and relative fefractive index difference is at outer edge, that is, inner cladding and sagging cladding interface 0.0%, the sagging cladding diameter 2R3 be 28.0 μm~35.0 μm, relative fefractive index difference Δ 3 be -0.40%~- 0.65%, the surrounding layer is pure silicon dioxide surrounding layer.
- 2. single mode optical fiber according to claim 1, it is characterised in that be at the mutation of the inner cladding relative fefractive index difference The intersection of inner cladding and sandwich layer.
- 3. single mode optical fiber as described in claim 1 or 2, it is characterised in that the inner cladding is from inward flange to outer peripheral phase Refractive index difference tapers off shape.
- 4. single mode optical fiber as described in claim 1 or 2, it is characterised in that the sandwich layer is that germanium chlorine is co-doped with silica glass Layer, the inner cladding is also that germanium chlorine is co-doped with silica glass layer.
- 5. single mode optical fiber as described in claim 1 or 2, it is characterised in that the sagging covering is the silica glass of fluorine doped Glass layer.
- 6. single mode optical fiber as described in claim 1 or 2, it is characterised in that mould field of the optical fiber at 1310nm wavelength is straight Diameter is 8.2~9.0 μm.
- 7. single mode optical fiber as described in claim 1 or 2, it is characterised in that the optical fiber has less than or equal to 1260nm's Cable cut-off wavelength.
- 8. single mode optical fiber as described in claim 1 or 2, it is characterised in that the optical fiber has zero color of 1300~1324nm Dissipate wavelength.
- 9. single mode optical fiber as described in claim 1 or 2, it is characterised in that the optical fiber is at 1550nm wavelength, for surrounding 10 millimeters of bending radius are less than or equal to 0.02dB around the bending added losses of 1 circle；For surrounding 7.5 millimeters of bending radius around 1 The bending added losses of circle are less than or equal to 0.06dB；For small around the bending added losses of 1 circle around 5.0 millimeters of bending radius In or equal to 0.10dB.
- 10. single mode optical fiber as described in claim 1 or 2, it is characterised in that the optical fiber is at 1625nm wavelength, for surrounding 10 millimeters of bending radius are less than or equal to 0.07dB around the bending added losses of 1 circle；For surrounding 7.5 millimeters of bending radius around 1 The bending added losses of circle are less than or equal to 0.20dB；For small around the bending added losses of 1 circle around 5.0 millimeters of bending radius In or equal to 0.30dB.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824610A (en) * | 2019-11-29 | 2020-02-21 | 江苏亨通光导新材料有限公司 | Bending insensitive single mode fiber |
| CN111381314A (en) * | 2020-04-24 | 2020-07-07 | 长飞光纤光缆股份有限公司 | Small-outer-diameter single-mode optical fiber |
| WO2021128563A1 (en) * | 2019-12-24 | 2021-07-01 | 中天科技精密材料有限公司 | Bending-resistant multimode optical fiber |
| CN114114523A (en) * | 2021-11-25 | 2022-03-01 | 长飞光纤光缆股份有限公司 | Large-mode-field-diameter single-mode fiber and application thereof |
| CN114397727A (en) * | 2021-07-21 | 2022-04-26 | 国家电网有限公司信息通信分公司 | An ultra-low attenuation large effective area single-mode fiber |
| CN114994830A (en) * | 2022-06-14 | 2022-09-02 | 江苏亨通光导新材料有限公司 | A kind of low-loss bending-resistant single-mode optical fiber and its manufacturing method |
| CN115128728A (en) * | 2022-06-01 | 2022-09-30 | 长飞光纤光缆股份有限公司 | Distributed acoustic vibration sensing optical fiber and acoustic vibration monitoring system |
| CN115490419A (en) * | 2022-09-30 | 2022-12-20 | 中天科技光纤有限公司 | Optical fiber and method for producing the same |
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| US20100158460A1 (en) * | 2008-12-19 | 2010-06-24 | Sehf-Korea Co., Ltd. | Low bend loss optical fiber |
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