CN106772788A - A kind of cutoff wavelength displacement single-mode fiber - Google Patents
A kind of cutoff wavelength displacement single-mode fiber Download PDFInfo
- Publication number
- CN106772788A CN106772788A CN201710100067.6A CN201710100067A CN106772788A CN 106772788 A CN106772788 A CN 106772788A CN 201710100067 A CN201710100067 A CN 201710100067A CN 106772788 A CN106772788 A CN 106772788A
- Authority
- CN
- China
- Prior art keywords
- scope
- optical fiber
- wavelength
- layer
- surrounding layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- G02B6/03661—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 4 layers only
- G02B6/03683—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 4 layers only arranged - - + +
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Glass Compositions (AREA)
Abstract
The present invention provides a kind of cutoff wavelength displacement single-mode fiber, including sandwich layer, the inner cladding, depressed cladding, middle covering and the surrounding layer that coat successively.The radius R of the sandwich layer1Scope be 5.5~8.5 μm, the refringence △ n of the relatively described surrounding layer of the sandwich layer1Scope be 0.1%~0.3%；The thickness R of the inner cladding2‑R1Scope be 5~25 μm, the refringence △ n of the relatively described surrounding layer of the inner cladding2Scope be 0.2%~0%；The thickness R of the depressed cladding3‑R2Scope be 4.5~12 μm, the refringence △ n of the relatively described surrounding layer of the depressed cladding3Scope be 0.45%~0.25%；The thickness R of the middle covering4‑R3Scope be more than 10 μm, the refringence △ n of the relatively described surrounding layer of middle covering4Scope be △ n2~0%；The radius R of the surrounding layer5Scope be 60~65 μm.The optical fiber that the present invention is provided not only has the excellent properties such as low decay, large effective area and low bend loss, and can realize the controllability of fiber cut off wavelength.
Description
Technical field
The present invention relates to optical communication field, more particularly to a kind of cutoff wavelength displacement single-mode fiber.
Background technology
Optical fiber as optical communication network underlying transport physical media, can direct body to the improvement of its Transmission system performance
Now in the improvement of OSNR (OSNR).The loss of optical fiber and nonlinear effect are limitation high-speed high capacity fiber optic communication systems
The key factor of system OSNR.Proved by correlative study, increase the effective area (A of optical fibereff), can not only be added to fine light
Power, can also effectively reduce nonlinear effect.So increasing optical fiber effective area, it is to overcome fibre loss to reduce fibre loss
With the main path of the two restraining factors of nonlinear effect.
G.652 the most frequently used single-mode fiber is 0.19dB/km in the decay representative value of 1550nm wavelength in current optic communication,
The upper limit of cutoff wavelength is 1260nm.Limited by cutoff wavelength, its effect area representative value is 83 μm2.And cutoff wavelength position
The cutoff wavelength upper limit for moving single-mode fiber (G.654) is 1530nm, and its effective area is typically larger than 100 μm2。
For the effective area A of optical fibereff, its with such as formula of the relation between mode field diameter MFD (1) Suo Shi,
In formula, k is correction factor.
From formula (1), the effective area A of optical fibereffTo square being directly proportional for MFD, therefore large effective area means greatly
Mode field diameter.Generally can be by increasing the sandwich layer external diameter of optical fiber or reducing the refringence between sandwich layer and optical fiber inner cladding to increase
Large mode field diameter.
The main component of telecommunication optical fiber is silica.In preform manufacturing process, typically by mixing dioxy
Changing germanium and improve the refractive index of sandwich layer, and mix fluorine element reduces cladding index.By the effort of 40 years, prefabricated rods and light
Fine manufacturing process has reached ultimate attainment.In addition to the Intrinsic Gettering of silica, the absorption and scattering of the germanium dioxide that adulterates
It is the main source of telecommunication optical fiber decay, therefore the content for reducing sandwich layer germanium dioxide is the Main way for reducing optical fiber attenuation.
Existing typical case is G.654 in Single Mode Fiber Design, although the refractive index of its sandwich layer and the content of germanium dioxide are substantially less than typical case
G.652 optical fiber, but its mode field diameter, cutoff wavelength λccThe further of sandwich layer germanium dioxide doping is limited with bending loss
Decline.
The content of the invention
In view of this, it is necessary to provide a kind of optical fiber, it passes through rational optical fiber structure and designs, and the loss of optical fiber is entered one
Step is reduced, and is met simultaneously G.654 to mode field diameter, cutoff wavelength and the isoparametric requirement of bending loss.
The present invention provides a kind of cutoff wavelength displacement single-mode fiber, including sandwich layer, the inner cladding, the depression bag that coat successively
Layer, middle covering and surrounding layer, wherein：
The radius of the sandwich layer is R1, R1Scope be 5.5~8.5 μm, the refractive index of the sandwich layer is n1, the sandwich layer
The refringence of relatively described surrounding layer is △ n1, △ n1Scope be 0.1%~0.3%；
The radius of the inner cladding is R2, the thickness of the inner cladding is R2-R1, R2-R1Scope be 5~25 μm, it is described
The refractive index of inner cladding is n2, the refringence of the relatively described surrounding layer of the inner cladding is △ n2, △ n2Scope be -0.2%
~0%；
The radius of the depressed cladding is R3, the thickness of the depressed cladding is R3-R2, R3-R2Scope be 4.5~12 μ
M, the refractive index of the depressed cladding is n3, the refringence of the relatively described surrounding layer of the depressed cladding is △ n3, △ n3Model
Enclose is -0.45%~-0.25%；
The radius of the middle covering is R4, the thickness of the middle covering is R4-R3, R4-R3Scope be more than 10 μm, it is described
The refractive index of middle covering is n4, the refringence of the relatively described surrounding layer of middle covering is △ n4, △ n4Scope be △ n2~
0%；
The radius of the surrounding layer is R5, R5Scope be 60~65 μm, the refractive index of the surrounding layer is nc。
Further, the radius R of the surrounding layer5Representative value be 62.5 μm.
Further, effective area of the optical fiber under wavelength 1550nm is 100~170 μm2；Under wavelength 1550nm
Dispersion be more than 18ps/nm/km；Attenuation coefficient under wavelength 1550nm is less than 0.18dB/km；The cable cutoff of the optical fiber
Wavelength is less than 1530nm.
Further, the effective area of the optical fiber is 100~145 μm2When, under wavelength 1550nm, 30mm radiuses-
The macrobending loss of 100 circles is less than 0.05dB, and under wavelength 1625nm, the macrobending loss of the circle of 30mm radiuses -100 is less than 0.1dB.
Further, the effective area of the optical fiber is 145~170 μm2When, under wavelength 1550nm, 30mm radiuses-
The macrobending loss of 100 circles is less than 0.15dB, and under wavelength 1625nm, the macrobending loss of the circle of 30mm radiuses -100 is less than 0.3dB.
Further, the application wave-length coverage of the optical fiber is 1535~1625nm.
Further, the optical fiber is the low-loss single-mode optical fiber of cutoff wavelength displacement.
The optical fiber that optical fiber structure provided by the present invention is designed can not only meet G.654 the mode field diameter of optical fiber,
Cable cut-off wavelength λccWith the parameter request such as bending loss, and with the spy of low decay, large effective area and low bend loss
Point；The controllability of fiber cut off wavelength can be realized by the regulation to optical fiber structure (middle covering) refractive index simultaneously.
Brief description of the drawings
Below in conjunction with Figure of description and embodiment, the invention will be further described.
Fig. 1 shows the cross-sectional view of the optical fiber of the embodiment of the present invention；
Fig. 2 shows the structure design schematic diagram of optical fiber shown in Fig. 1；
Fig. 3 shows the refractive index profile figure of the optical fiber of example 1；
Fig. 4 shows the refractive index profile figure of the optical fiber of example 2；
Fig. 5 shows the refractive index profile figure of the optical fiber of example 3；
Fig. 6 shows the refractive index profile figure of the optical fiber of example 4；
Fig. 7 shows the refractive index profile figure of the optical fiber of example 5；
Fig. 8 shows the refractive index profile figure of the optical fiber of example 6；
Fig. 9 shows the refractive index profile figure of the optical fiber of example 7；
Figure 10 shows the refractive index profile figure of the optical fiber of example 8.
Main element symbol description
| Optical fiber | 10 |
| Sandwich layer | 11 |
| Inner cladding | 13 |
| Depressed cladding | 15 |
| Middle covering | 17 |
| Surrounding layer | 19 |
Following specific embodiment will further illustrate the present invention with reference to above-mentioned accompanying drawing.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.It is appreciated that accompanying drawing is only provided used with reference to explanation, not for this hair
It is bright to be any limitation as.The connection shown in accompanying drawing is only to be described for ease of clear, and does not limit connected mode.
It should be noted that when a part is considered as " connection " another part, it can be directly to another
Part may be simultaneously present part placed in the middle.Unless otherwise defined, all of technologies and scientific terms used here by the article with belong to
The implication that those skilled in the art of the invention are generally understood that is identical.Used in the description of the invention herein
Term is intended merely to describe the purpose of specific embodiment, it is not intended that in the limitation present invention.
Fig. 1 and Fig. 2 is refer to, the present embodiment provides a kind of optical fiber 10, and it can realize low-loss and large effective area.
In present embodiment, optical fiber 10 is G.654 single-mode fiber, its mode field diameter, cable cut-off wavelength λccWith the parameter such as bending loss
Meet the parameter and standard of G.654 optical fiber.Optical fiber 10 includes being located at the sandwich layer 11 of center, is coated on the outer surface of sandwich layer 11
Inner cladding 13, the depressed cladding 15 being coated on the outer surface of inner cladding 13, the middle covering being coated on the outer surface of depressed cladding 15
17 and the surrounding layer 19 that is coated on the outer surface of middle covering 17.As shown in figure 1, sandwich layer 11, inner cladding 13, depressed cladding 15, in
The cross-sectional view of covering 17 and surrounding layer 19 is five concentric circles.In the present embodiment, the increase of depressed cladding 15 is conducive to
The optimization of the bending loss of single-mode fiber 10；Surrounding layer 19 is typically made up of pure silicon dioxide.In other embodiment of the invention
In, surrounding layer 19 is alternatively the silica of other additional materials of light dope, such as silica of slight fluorine doped.
The radius of sandwich layer 11 is R1, the refractive index of sandwich layer 11 is n1, the refringence between sandwich layer 11 and surrounding layer 19 is △
n1, wherein, R1Scope be 5.5~8.5 μm, △ n1Scope be 0.1%~0.3%.Reflected between sandwich layer 11 and surrounding layer 19
The change of rate difference can be realized by adulterating germanium dioxide in sandwich layer 11.
The radius of inner cladding 13 is R2, the refractive index of inner cladding 13 is n2, the refractive index between inner cladding 13 and surrounding layer 19
Difference is △ n2, wherein, the thickness R of inner cladding 132-R1Scope be 5~25 μm, △ n2Scope be -0.2%~0%.
The radius of depressed cladding 15 is R3, the refractive index of depressed cladding 15 is n3, between depressed cladding 15 and surrounding layer 19
Refringence is △ n3, wherein, the thickness R of depressed cladding 153-R2Scope be 4.5~12 μm, △ n3Scope be -0.45%
~-0.25%.
The radius of middle covering 17 is R4, the refractive index of middle covering 17 is n4, the refractive index between middle covering 17 and surrounding layer 19
Difference is △ n4, wherein, the thickness R of middle covering 174-R3Scope be the △ n more than 10 μm4Scope be △ n2~0%.
The radius of surrounding layer 19 is R5, the refractive index of surrounding layer 19 is n5, the thickness of surrounding layer 19 is R5-R4, wherein, R5's
Scope is 60~65 μm, and its representative value is that 62.5 μm, the i.e. radius of optical fiber 10 are 60~65 μm, and its representative value is 62.5 μ
m。
Following table I shows the example of the structure design according to optical fiber of the present invention 10, and outer other of the scope of the invention set
The comparative example of meter.Wherein example 3, example 5, example 7 and example 8 are the examples according to structure design of the present invention, and example 1, example 2, example 4 and example 6 exist
Outside protection scope of the present invention and be to be compared given example.
Table I
Following table II shows the test value of the main performance of example shown in Table I and comparative example.The present invention before testing, example
The optical fiber of the description of 1 to example 8 under zero tension force after-combustion on the disk of a 420mm diameters, then using optical time domain reflectometer
(PK8000-OTDR) decay of the test optical fiber under each wavelength, to eliminate influence of the macrobending to attenuation test result.
Table II
Fig. 3 to Figure 10 is refer to, the different and superiority of each example and comparative example is analyzed in combination with Table I and Table II.Example 1
It is using axial vapor deposition method (VAD) or VAD and improved chemical vapor deposition (MCVD) fluorine doped to example 5 (Fig. 3 to Fig. 7)
Quartz socket tube mixing method makes the example of optical fiber.Example 1 and common G.652 optical fiber ((Δ n1+|Δn2|) about 0.35%) with class
As index distribution, be simplest fiber design be also the most frequently used G.654 optical fiber at present design, on the one hand it pass through
Increase the radius of sandwich layer 11 to increase effective area；On the other hand by reducing the refringence (Δ of sandwich layer 11 and inner cladding 13
n1+|Δn2| about 0.29%) increase effective area.Relative to the performance of G.652 optical fiber, the optical fiber of example 1 has relatively low decay system
Number and big mode field diameter, but due to being limited by cable cut-off wavelength and bending loss, between sandwich layer 11 and inner cladding 13
The incrementss of refringence optimization range and effective area are all very limited (nominal value of mode field diameter is typically smaller than 12.5 μm).
If necessary to further improve mode field diameter, except adjustment sandwich layer 11 and the refringence and sandwich layer diameter of inner cladding 13, also adopt
The bending loss of optical fiber is controlled with sunk structure.
Example 2 and example 1 have identical (Δ n1+|Δn2|) (about 0.29%).Further to reduce fibre loss, example 2 passes through
Reduce the doping reduction n of the germanium dioxide of sandwich layer 111, in order to keep mode field diameter constant, while reducing n2.Test result shows
Attenuation coefficient of the optical fiber of example 2 at 1550nm has somewhat declined, but cable cut-off wavelength is relatively low (1298nm).Although inner cladding
13 thickness is very big (about 22 μm), but bending loss is seriously deteriorated that (1550nm and 1625nm at, it is grand that 30mm radiuses -100 are enclosed
Curved loss is up to 0.27dB and 0.93dB respectively).
Example 3 with the addition of depressed cladding 15 and middle covering 17 on the basis of example 2, from Table II it can be seen that the optical fiber of example 3 it is curved
Song loss be significantly reduced (1550nm and 1625nm at, 30mm radiuses -100 circle macrobending loss respectively up to 0.01dB with
0.02dB), the attenuation coefficient and at 1550nm is relatively low, and cable cut-off wavelength is also significantly improved (1444nm).
Example 4 has identical n with example 2 and example 32.Optical fiber attenuation is further reduced simultaneously in order to increase mode field diameter, and example 4 has
Low-down Δ n1(0.12%), its (Δ n1+|Δn2|) it is about 0.2%.It is (i.e. recessed that the example employs traditional sunk structure
Fall into covering 15) reduce bending loss, but the data display sunk structure of Table II improves limited for the bending loss of great circle
(at 1550nm and 1625nm, the macrobending loss of the circle of 30mm radiuses -100 reaches 0.20dB and 0.39dB respectively)；Simultaneously because Δ
n1Reduction, the cable cut-off wavelength of the optical fiber of example 4 is too low (1021nm), and the cable cut-off wavelength is difficult to adjust and controls.
It is not enough present in example 4 to solve, example 5 be with the addition of on the basis of example 4 in covering 17, from Table II it can be seen that example
5 bending loss that can further reduce optical fiber on the basis of relatively low decay (at 1550nm and 1625nm, 30mm radiuses-
The macrobending loss of 100 circles reaches 0.07dB and 0.16dB respectively), and cable cut-off wavelength meets G.654 standard.
Example 6 to example 8 (Fig. 8 to Figure 10) is to make optical fiber using MCVD techniques and fluorine-doped quartz sleeve pipe or pure quartz socket tube
Example.The optical fiber of comparative example 6 is further reducing the folding of sandwich layer 11 to the main performance test value and parameter of structure design of the optical fiber of example 8
Penetrate rate n1, reduce optical fiber attenuation on the premise of, simply use improvement of the depressed cladding 15 to bending loss be it is very limited amount of, only
There is increase to employ the design of middle covering 17, the bending loss of optical fiber can be just reduced within claimed range.The optical fiber of example 7 exists
Fiber attenuation coefficient at 1550nm is 0.176dB/km, and the macrobending loss of the circle of 30mm radiuses -100 is 0.02dB；In 1625nm
Place, fiber attenuation coefficient is 0.192dB/km, and the macrobending loss of the circle of 30mm radiuses -100 is 0.04dB.Comparative example 6 and example 7 and example
8, cable cut-off wavelength λcc1512nm and 1405nm are changed into from 1303nm, i.e., by cladding index n in regulation4, can be to optical fiber
Cutoff wavelength is changed and controls.
The knot of the center core layer 11 of optical fiber 10, inner cladding 13, depressed cladding 15, middle covering 17 and surrounding layer 19 that the present invention is provided
The characteristics of structure design has low decay, large effective area and low bend loss.Simultaneously sandwich layer 11, inner cladding 13, depressed cladding 15,
The parameter of middle covering 17 and surrounding layer 19 can realize following feature：The application wave-length coverage of optical fiber 10 is 1535nm to 1625nm；
Effective area is 100~170 μm under wavelength 1550nm2；Dispersion is more than 18ps/nm/km under wavelength 1550nm；In wavelength
Attenuation coefficient under 1550nm is less than 0.18dB/km.The cable cut-off wavelength of optical fiber 10 is less than 1530nm.
When the effective area scope of optical fiber 10 is 100~145 μm2, under wavelength 1550nm, it is grand that 30mm radiuses -100 are enclosed
Curved loss is less than 0.05dB, and under wavelength 1625nm, the macrobending loss of the circle of 30mm radiuses -100 is less than 0.1dB.When optical fiber 10
Effective area scope is 145~170 μm2, under wavelength 1550nm, the macrobending loss of the circle of 30mm radiuses -100 is less than 0.15dB,
Under wavelength 1625nm, the macrobending loss of the circle of 30mm radiuses -100 is less than 0.3dB.The optical fiber 10 that the present invention is provided is complied fully with
G.654 on mode field diameter, cable cut-off wavelength λ in standardccWith the requirement of bending loss, further reduce and decay and realize low
Bending loss and large effective area, meanwhile, the single-mode fiber 10 that the present invention is provided can be by the refractive index n of covering in regulation 174
Size, to realize change and control to fiber cut off wavelength.
The fibre-optical mandrel of the optical fiber 10 that the present invention is provided is applied to axial vapor deposition method (VAD), outside chemical gas phase and sinks
The various manufacture works such as area method (OVD), Plasma Enhanced Chemical Vapor Deposition (PECVD) (PCVD) and modified chemical vapor deposition process (MCVD) (MCVD)
Skill or hybrid technique.In the present embodiment, the manufacture craft of the fibre-optical mandrel can be using sedimentation in pipe, i.e., with silicon tetrachloride
As the raw material of silica, germanium tetrachloride as germanium dioxide raw material, ocratation, sulfur hexafluoride or perfluoroethane conduct
The raw material of fluorine doped, depressed cladding 15, inner cladding 13 and sandwich layer 11 are sequentially depositing in the quartzy base tube inner surface of fluorine doped, then in high temperature
It is lower by the deposition base tube collapsing into the plug, the now quartzy base tube of the quartzy base tube of the fluorine doped or the part fluorine doped
Covering 17 in formation.If the thickness of middle covering 17 is less than design load, can use in the side of the additional fluorine doped sleeve pipe of the fibre-optical mandrel
Formula realizes that now the fibre-optical mandrel and the fluorine doped sleeve pipe pass through sleeve pipe collapsing method integrator.Sedimentation is fitted in the pipe
For PCVD, MCVD or smelting furnace chemical vapour deposition technique (FCVD) manufacturing process.
In other embodiment of the invention, also the fibre-optical mandrel can be made using other manufacture crafts, such as mixed
Method, i.e., make the inner core rod of the fibre-optical mandrel first with VAD or OVD methods, and the inner core rod includes sandwich layer 11 and inner cladding 13；
In conjunction with PCVD, MCVD or FCVD method, using silicon tetrachloride as the raw material of silica, ocratation, sulfur hexafluoride or hexafluoro
Ethane as fluorine doped raw material, in fluorine-doped quartz pipe internal surface sedimentary depression covering 15；By the inner core rod and the fluorine doped stone
English pipe forms middle covering by sleeve pipe collapsing method integrator, now the fluorine-doped quartz pipe or part the fluorine-doped quartz pipe
17, if the thickness of middle covering 17 is less than design load, can be realized by the way of separately fluorine doped sleeve pipe is added outside the fibre-optical mandrel.Or
Other methods that can produce fluorine doped high purity quartz prepare depressed cladding 15 and middle covering 17, such as fluorine doped sleeve pipe or utilization OVD powder
Deposition combines fluorine doped sintering process in the inner core rod external sediment depressed cladding 15 and middle covering 17 etc..
After the fibre-optical mandrel of the single-mode fiber 10 completed by above method preparation is through survey calculation, the plug needed for obtaining is straight
Footpath and the thickness of surrounding layer 19, obtain the plug of goal standard, then melt contracting by quartz glass tube by being heat-treated extension, alignment
Or outside deposition, melt contracting method formed surrounding layer 19, finally by degassing etc. operation formed single-mode fiber 10 predispersed fiber
Rod processed.It should be understood that needing accurately to realize the △ n of design during the fibre-optical mandrel is made1、△n2、△n3、△
n4And the value of α, to ensure mode field diameter, the cable cut-off wavelength λ of single-mode fiber 10ccMeet G.654 standard with bending loss.
The single-mode fiber 10 that the present invention is provided can not only meet the G.654 mode field diameter of optical fiber, cable cut-off wavelength λcc
With the parameter request such as bending loss, and the characteristics of with low decay, large effective area and low bend loss；Simultaneously can be by right
The regulation of optical fiber structure refractive index, realizes the controllability of fiber cut off wavelength.The low damage of the cutoff wavelength displacement that the present invention is provided
Consumption single-mode fiber 10 can be applied to some high speed long distance optic transmission systems, including fibres submarine telecommunication, such as land and island, island
Communication system between small island and island, coastal cities；The geographical conditions such as circuit needs cross the desert, lake, marsh, forest are severe
Place, and geographical environment is complicated or the more severe place of weather etc.；And private communication along high-voltage electric power system.
In specification and claims of this application requirements, word "comprises/comprising" and word " have/including " and its deformation,
For specifying the presence of stated feature, numerical steps or part, but one or more of the other spy is not precluded the presence or addition of
Levy, numerical value, step, component or combinations thereof.
For clarity, some described in a single embodiment features of the present invention, can combine in single embodiment
In use.And, the various features of the invention described in single embodiment, it is also possible to individually or with any suitable shape
Formula is used in sub-portfolio.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of cutoff wavelength displacement single-mode fiber, it is characterised in that including sandwich layer, the inner cladding for coating successively, depressed cladding,
Middle covering and surrounding layer, wherein：
The radius of the sandwich layer is R1, R1Scope be 5.5~8.5 μm, the refractive index of the sandwich layer is n1, the sandwich layer is relative
The refringence of the surrounding layer is △ n1, △ n1Scope be 0.1%~0.3%；
The radius of the inner cladding is R2, the thickness of the inner cladding is R2-R1, R2-R1Scope be 5~25 μm, the interior bag
The refractive index of layer is n2, the refringence of the relatively described surrounding layer of the inner cladding is △ n2, △ n2Scope for -0.2%~
0%；
The radius of the depressed cladding is R3, the thickness of the depressed cladding is R3-R2, R3-R2Scope be 4.5~12 μm, institute
The refractive index for stating depressed cladding is n3, the refringence of the relatively described surrounding layer of the depressed cladding is △ n3, △ n3Scope
It is -0.45%~-0.25%；
The radius of the middle covering is R4, the thickness of the middle covering is R4-R3, R4-R3Scope be the middle bag more than 10 μm
The refractive index of layer is n4, the refringence of the relatively described surrounding layer of middle covering is △ n4, △ n4Scope be △ n2~0%；
The radius of the surrounding layer is R5, R5Scope be 60~65 μm, the refractive index of the surrounding layer is nc。
2. cutoff wavelength displacement single-mode fiber as claimed in claim 1, it is characterised in that the radius R of the surrounding layer5Allusion quotation
Offset is 62.5 μm.
3. cutoff wavelength displacement single-mode fiber as claimed in claim 1, it is characterised in that the optical fiber is under wavelength 1550nm
Effective area be 100~170 μm2；Dispersion under wavelength 1550nm is more than 18ps/nm/km；Declining under wavelength 1550nm
Subtract coefficient less than 0.18dB/km；The cable cut-off wavelength of the optical fiber is less than 1530nm.
4. cutoff wavelength displacement single-mode fiber as claimed in claim 3, it is characterised in that the effective area of the optical fiber is
100~145 μm2When, under wavelength 1550nm, the macrobending loss of the circle of 30mm radiuses -100 is less than 0.05dB, in wavelength 1625nm
Under, the macrobending loss of the circle of 30mm radiuses -100 is less than 0.1dB.
5. cutoff wavelength displacement single-mode fiber as claimed in claim 3, it is characterised in that the effective area of the optical fiber is
145~170 μm2When, under wavelength 1550nm, the macrobending loss of the circle of 30mm radiuses -100 is less than 0.15dB, in wavelength 1625nm
Under, the macrobending loss of the circle of 30mm radiuses -100 is less than 0.3dB.
6. cutoff wavelength displacement single-mode fiber as claimed in claim 1, it is characterised in that the application wave-length coverage of the optical fiber
It is 1535~1625nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710100067.6A CN106772788B (en) | 2017-02-23 | 2017-02-23 | Single mode fiber with cut-off wavelength displacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710100067.6A CN106772788B (en) | 2017-02-23 | 2017-02-23 | Single mode fiber with cut-off wavelength displacement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106772788A true CN106772788A (en) | 2017-05-31 |
| CN106772788B CN106772788B (en) | 2019-12-13 |
Family
ID=58960096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710100067.6A Active CN106772788B (en) | 2017-02-23 | 2017-02-23 | Single mode fiber with cut-off wavelength displacement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106772788B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422415A (en) * | 2017-06-15 | 2017-12-01 | 长飞光纤光缆股份有限公司 | A kind of single-mode fiber of ultralow attenuation large effective area |
| CN107490819A (en) * | 2017-08-22 | 2017-12-19 | 长飞光纤光缆股份有限公司 | Single-mode fiber with ultralow attenuation large effective area |
| CN108363138A (en) * | 2018-02-09 | 2018-08-03 | 长飞光纤光缆股份有限公司 | A kind of four mode fibers of ultralow decaying of gradation type |
| CN108415120A (en) * | 2018-02-09 | 2018-08-17 | 长飞光纤光缆股份有限公司 | A kind of two mode fibers of ultralow decaying of gradation type |
| CN109839694A (en) * | 2017-11-27 | 2019-06-04 | 中天科技精密材料有限公司 | A kind of cutoff wavelength displacement single mode optical fiber |
| CN110488411A (en) * | 2019-08-19 | 2019-11-22 | 长飞光纤光缆股份有限公司 | A kind of counter-bending single mode optical fiber |
| CN111164478A (en) * | 2017-09-15 | 2020-05-15 | 康普连通比利时私人有限公司 | Optical fiber thermal treatment for improved cleaving |
| CN111239891A (en) * | 2019-12-25 | 2020-06-05 | 中天科技精密材料有限公司 | Low-loss cut-off wavelength displacement single-mode fiber |
| CN111308609A (en) * | 2019-12-25 | 2020-06-19 | 中天科技精密材料有限公司 | Large-effective-area low-loss single-mode optical fiber |
| CN113716862A (en) * | 2021-09-01 | 2021-11-30 | 中天科技光纤有限公司 | Method and apparatus for manufacturing optical fiber |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110002590A1 (en) * | 2008-04-16 | 2011-01-06 | Haruo Ooizumi | Graded index multimode optical fiber |
| CN102933996A (en) * | 2009-09-11 | 2013-02-13 | 康宁股份有限公司 | Low bend loss optical fiber |
| 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 |
| CN105393149A (en) * | 2013-04-15 | 2016-03-09 | 康宁股份有限公司 | Low diameter optical fiber |
-
2017
- 2017-02-23 CN CN201710100067.6A patent/CN106772788B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110002590A1 (en) * | 2008-04-16 | 2011-01-06 | Haruo Ooizumi | Graded index multimode optical fiber |
| CN102933996A (en) * | 2009-09-11 | 2013-02-13 | 康宁股份有限公司 | Low bend loss optical fiber |
| CN105393149A (en) * | 2013-04-15 | 2016-03-09 | 康宁股份有限公司 | Low diameter optical fiber |
| 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 |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422415B (en) * | 2017-06-15 | 2020-05-05 | 长飞光纤光缆股份有限公司 | Single-mode fiber with ultralow attenuation and large effective area |
| CN107422415A (en) * | 2017-06-15 | 2017-12-01 | 长飞光纤光缆股份有限公司 | A kind of single-mode fiber of ultralow attenuation large effective area |
| CN107490819A (en) * | 2017-08-22 | 2017-12-19 | 长飞光纤光缆股份有限公司 | Single-mode fiber with ultralow attenuation large effective area |
| CN107490819B (en) * | 2017-08-22 | 2020-05-05 | 长飞光纤光缆股份有限公司 | Single mode optical fiber with ultra-low attenuation and large effective area |
| CN111164478A (en) * | 2017-09-15 | 2020-05-15 | 康普连通比利时私人有限公司 | Optical fiber thermal treatment for improved cleaving |
| CN109839694A (en) * | 2017-11-27 | 2019-06-04 | 中天科技精密材料有限公司 | A kind of cutoff wavelength displacement single mode optical fiber |
| CN109839694B (en) * | 2017-11-27 | 2020-08-18 | 中天科技精密材料有限公司 | Single mode fiber with cut-off wavelength displacement |
| CN108415120A (en) * | 2018-02-09 | 2018-08-17 | 长飞光纤光缆股份有限公司 | A kind of two mode fibers of ultralow decaying of gradation type |
| CN108363138A (en) * | 2018-02-09 | 2018-08-03 | 长飞光纤光缆股份有限公司 | A kind of four mode fibers of ultralow decaying of gradation type |
| CN110488411A (en) * | 2019-08-19 | 2019-11-22 | 长飞光纤光缆股份有限公司 | A kind of counter-bending single mode optical fiber |
| CN111239891A (en) * | 2019-12-25 | 2020-06-05 | 中天科技精密材料有限公司 | Low-loss cut-off wavelength displacement single-mode fiber |
| CN111308609A (en) * | 2019-12-25 | 2020-06-19 | 中天科技精密材料有限公司 | Large-effective-area low-loss single-mode optical fiber |
| CN111308609B (en) * | 2019-12-25 | 2021-12-14 | 中天科技精密材料有限公司 | Large-effective-area low-loss single-mode optical fiber |
| CN111239891B (en) * | 2019-12-25 | 2022-08-05 | 中天科技精密材料有限公司 | Low-loss cut-off wavelength displacement single-mode fiber |
| CN113716862A (en) * | 2021-09-01 | 2021-11-30 | 中天科技光纤有限公司 | Method and apparatus for manufacturing optical fiber |
| CN113716862B (en) * | 2021-09-01 | 2023-03-21 | 中天科技光纤有限公司 | Method and apparatus for manufacturing optical fiber |
| 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 |
| CN115128728B (en) * | 2022-06-01 | 2023-09-26 | 长飞光纤光缆股份有限公司 | Distributed acoustic vibration sensing optical fiber and acoustic vibration monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106772788B (en) | 2019-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106772788A (en) | A kind of cutoff wavelength displacement single-mode fiber | |
| CN102645699B (en) | Low-attenuation bend-insensitive single-mode fiber | |
| CN102590933B (en) | Bending insensitive single-mode optical fiber | |
| CN105899982B (en) | Show the single mode optical fiber with trapezoidal fibre core that loss reduces | |
| CN109839694B (en) | Single mode fiber with cut-off wavelength displacement | |
| CN103345017B (en) | A kind of bend-insensitive single-mode optical fiber | |
| CN105334570B (en) | A kind of low decaying bend-insensitive single-mode optical fiber | |
| CN102540327A (en) | Bent insensitive single-mode optical fiber | |
| CN104316994A (en) | Low-attenuation bending insensitive single mode fiber | |
| CN102385103B (en) | Optical fiber, optical fiber preform and method of fabricating same | |
| WO2016173253A1 (en) | Ultralow-attenuation bend-insensitive single-mode optical fibre | |
| CN112904474B (en) | Small-outer-diameter low-attenuation bending insensitive single-mode optical fiber | |
| CN104698535A (en) | Bent insensitive multi-mode optical fiber | |
| CN103454719A (en) | Single mode optical fiber | |
| CN102778722A (en) | Gradient-refractive index bending resistant multimode optical fiber | |
| CN103472525B (en) | Low-loss large-effective area single mode fiber and manufacturing method thereof | |
| CN107678087A (en) | A kind of low attenuation large effective area single-mode fiber | |
| CN110045456B (en) | Single-mode optical fiber with ultralow loss and large effective area and preparation method thereof | |
| CN104216044B (en) | A kind of low attenuation bend-insensitive single-mode optical fiber | |
| WO2020119439A1 (en) | Single-mode optical fiber having low loss and large effective area and preparation method therefor | |
| CN104216045A (en) | Optical fiber and manufacturing method thereof | |
| CN106443875A (en) | Ultra-low attenuation bend insensitive single-mode fiber | |
| CN103399376B (en) | A kind of bend-insensitive single-mode optical fiber and manufacture method thereof | |
| CN106716198A (en) | Optical fiber and method for manufacturing same | |
| CN105137534B (en) | A kind of miniaturized device single mode optical fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200108 Address after: 226009 Zhongtian Road, Nantong Development Zone, Jiangsu Province, No. 3 Co-patentee after: Zhongtian Science and Technology Co., Ltd., Jiangsu Patentee after: Jiangsu Zhongtian Technology Precision Material Co., Ltd. Co-patentee after: State Grid Co., Ltd. Co-patentee after: State Grid Corporation Limited information and communication branch Co-patentee after: State Grid Heilongjiang Electric Power Co., Ltd. Co-patentee after: Global energy Internet Institute, Inc. Address before: 226009 Zhongtian Road, Nantong Development Zone, Jiangsu Province, No. 3 Co-patentee before: Zhongtian Science and Technology Co., Ltd., Jiangsu Patentee before: Jiangsu Zhongtian Technology Precision Material Co., Ltd. |
|
| TR01 | Transfer of patent right |