CN110058350A - A kind of low-loss large effective area dispersion shifted single mode fiber and its manufacturing method - Google Patents
A kind of low-loss large effective area dispersion shifted single mode fiber and its manufacturing method Download PDFInfo
- Publication number
- CN110058350A CN110058350A CN201910341229.4A CN201910341229A CN110058350A CN 110058350 A CN110058350 A CN 110058350A CN 201910341229 A CN201910341229 A CN 201910341229A CN 110058350 A CN110058350 A CN 110058350A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- dispersion
- wavelength
- effective area
- less
- 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.)
- Pending
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
- G02B6/02004—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
- G02B6/02014—Effective area greater than 60 square microns in the C band, i.e. 1530-1565 nm
-
- 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
- G02B6/02214—Optical fibres with cladding with or without a coating tailored to obtain the desired dispersion, e.g. dispersion shifted, dispersion flattened
- G02B6/02219—Characterised by the wavelength dispersion properties in the silica low loss window around 1550 nm, i.e. S, C, L and U bands from 1460-1675 nm
- G02B6/02276—Dispersion shifted fibres, i.e. zero dispersion at 1550 nm
-
- 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
- G02B6/03644—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 arranged - + -
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Optical Communication System (AREA)
Abstract
The present invention is to provide a kind of low-loss large effective area dispersion shifted single mode fiber and its manufacturing methods.Its fibre core is adulterated using Ge and Cl, and the first and third covering is shallowly to mix F covering, and the second covering is Ge, F codope.The mode field diameter of optical fiber 1550nm is 9.6 ± 0.4 μm, and effective area is greater than 75 μm2, zero-dispersion wavelength be less than 1500nm, 1530nm~1625nm dispersion values in 2.0~8.0ps/nm/km range, chromatic dispersion gradient≤0.06ps/nm of 1550nm2The dispersion values of/km, 1550nm are 3.0ps/nm/km between 5.0ps/nm/km；Fiber cut off wavelength is less than 1500nm.In 1550nm bending loss, 1 circle is not more than 0.01dB under 16mm bending radius, and optical fiber is less than or equal to 0.185dB/km in the attenuation of 1550nm wavelength.
Description
(1) technical field
The present invention relates to a kind of low-loss large effective area dispersion shifted single mode fiber and its manufacturing method, main application
In high-speed optical fibre for metropolitan area network communication transmission field.
(2) background technique
Always constantly improve, number of users continues is increasing the transmission capacity of fiber optic communication.Long-distance transmission line mainly solves
Certainly be carrier network scale.But Metropolitan Area Network (MAN) is the high value traffic network of operator, includes high speed Internet access business, interaction
Game service, government services business, network TV business, enterprise/community services business etc..
The Networks of Fiber Communications of establishing of MAN is one of operator's emphasis investment contents, requires price just to optical fiber
Preferably, it is suitble to a variety of transmission plans.Therefore, a kind of low-loss dispersion shift large-effective area single mode fiber can satisfy this need
It asks, main performance is to improve C+L band dispersion characteristics, it is made to be suitble to the transmission of SDH and DWDM in Metropolitan Area Network (MAN).Meanwhile it to drop
Low network construction cost increases optical fiber in the effective area of 1550nm and reduces fibre loss, so that Metropolitan Area Network (MAN) is built less or do not built
Relaying amplification, can be greatly lowered network cost, meet actual demand.
Document CN00815954.8 discloses a kind of dispersion shifted optical fiber that effective area is big, in 1470nm to 1625nm
There are the dispersion values of 1.0ps/nm/km to 16.0ps/nm/km.It is greater than 70 μm in the effective area of 1550nm2, at 1550nm
Attenuation is less than 0.20dB/km.The optical fiber is larger in the dispersion of C+L band, and chromatic dispersion gradient is big, needs special dispersion compensating fiber
It is broadened to compensate long distance transmission bring pulse, but dispersion compensation brings the increase of system loss, and whole system is caused to be made
The increase of valence.
A kind of dispersion shifted optical fiber of low-dispersion slope, 1530nm to 1625nm are disclosed in document CN02809096.9
There are the dispersion values of 2.5ps/nm/km to 8.6ps/nm/km.It is about 8.3 ± 0.6 μm in the mode field diameter of 1550nm, in 1550nm
The attenuation at place is less than 0.22dB/km.In chromatic dispersion gradient≤0.05ps/nm of 1550nm2/km.This layout optimises dispersions, still
It is smaller in the limited areal of 1550nm, less than 60 μm2, and Section Design is complicated, increases manufacturing cost.
A kind of super large effective area and low dispersion slope non-zero dispersion displacement optical fiber is disclosed in document CN03119080.4, it should
Fiber design has the totally 6 layers of design of 5 core segments and 1 covering.Optical fiber 1550nm dispersion values 8ps/nm/km extremely
Between 10ps/nm/km.It is greater than 95 μm in the effective area of 1550nm2, the attenuation at 1550nm is less than 0.22dB/km.?
Chromatic dispersion gradient≤0.06ps/nm of 1550nm2/km.Dispersion values of the optical fiber in 1550nm are very big, reach 10ps/nm/km.
Dispersion shifted optical fiber always is disclosed in document CN03125581.7, zero dispersion point is very high, 1640nm with
On.It has the dispersion values of -1.0ps/nm/km to -10.0ps/nm/km in 1530nm to 1625nm, in the effective area of 1550nm
It is 40~70 μm2.This design causes effective area very small because zero-dispersion wavelength is very big.
A kind of dispersion shifted optical fiber is disclosed in document CN03823169.7, zero-dispersion wavelength is less than 1450nm,
The effective area of 1550nm is greater than 60 μm2, in chromatic dispersion gradient≤0.07ps/nm of 1550nm2/km.Dispersion of the optical fiber in 1550nm
Value is 4ps/nm/km between 10ps/nm/km.Its dispersion is larger, and when network construction needs dispersion compensation, and effective area is inclined
It is small.
Disclose a kind of dispersion shifted optical fiber in document CN200410098270.7, the optical fiber in 1490nm to 1625nm
Effective area be 45~120 μm2, chromatic dispersion gradient is 0.03~0.10ps/nm2/ km, but bending loss is 100dB/m, this
The attenuation of sample optical fiber will be very big.
A kind of dispersion shifted optical fiber of low decaying is disclosed in document CN200680051445.6, zero-dispersion wavelength is less than
1450nm is greater than 50 μm in the effective area of 1550nm2, in chromatic dispersion gradient≤0.06ps/nm of 1550nm2/km.Optical fiber exists
The dispersion values of 1550nm are 5ps/nm/km between 15ps/nm/km.The optical fiber is less than 0.19dB/km 1550nm's.Its color
Dissipate larger, when network construction needs dispersion compensation.
Dispersion shifted optical fiber is disclosed in document CN200910203954.1, dispersion values of the optical fiber in 1550nm are less than
12ps/nm/km, effective area are greater than 50 μm2, and cutoff wavelength is less than 1600nm.This design causes fiber cut off wavelength high,
Effective single mode transport is not can guarantee, and effective area is very small.
201110034823.2 disclose a kind of dispersion shifted optical fiber of short cutoff wavelength in document CN, which exists
The dispersion values of 1550nm are 3ps/nm/km between 14ps/nm/km, and effective area is greater than 55 μm2, and cutoff wavelength is less than
1150nm.The bending loss of this design optical fiber is big, and effective area is less than normal.
Dispersion shifted optical fiber is disclosed in document CN201110035625.8, which is 3ps/ in the dispersion values of 1550nm
For nm/km between 14ps/nm/km, effective area is greater than 95 μm2, in chromatic dispersion gradient≤0.11ps/nm of 1550nm2/ km, and cut
Only wavelength is less than 1530nm.Its dispersion is larger, and when network construction needs dispersion compensation, and the document do not disclose manufacturing method or
Other technical characteristics.
Dispersion shifted optical fiber is disclosed in document CN200820166463.5, dispersion of the optical fiber in 1530nm~1625nm
Value is 2.5ps/nm/km between 12ps/nm/km, 70~75 μm of effective area2, 1550nm chromatic dispersion gradient≤
0.073ps/nm2/ km, zero-dispersion wavelength is less than 1500nm, and cutoff wavelength is less than 1530nm.It is small in the optical fiber attenuation of 1550nm
In 0.22dB/km.The dispersion of the optical fiber and chromatic dispersion gradient are larger, and without disclosing manufacture formula and method.
In conclusion the large effective area dispersion shifted single mode fiber for developing a kind of low dispersion values of low attenuation closes very much
Key.In order to which the long-distance optical fiber communication of establishing of MAN must be single mode transport, dispersion and the chromatic dispersion gradient of C+L band are reduced, together
The effective area of Shi Zeng great 1550nm reduces optical fiber in the attenuation of 1550nm, and improves the bend loss properties of optical fiber, can be effective
Reduce network construction cost.Meanwhile selecting a kind of suitable technique manufacturing method to manufacture the optical fiber, the doping skill including fibre core
Art is also a urgent problem to be solved.
(3) summary of the invention
The purpose of the present invention is to provide a kind of low-loss, low dispersion values, the dispersion shifted optical fiber of large effective area and its
Preparation method.
It is involved term in the present invention below:
Relative fefractive index difference: outermost one layer of optical fiber is defined as surrounding layer, and absolute index of refraction is defined as nSiO2, past from a left side
Right i-th of step (referring to attached drawing 1) is defined as i-th layer, if i is outermost one layer, absolute index of refraction is exactly nSiO2。
I-th layer of relative fefractive index difference is defined as:
The effective area Aeff of optical fiber is defined by following formula:
Wherein E is and propagates the associated electric field of light in optical fiber, and r is the radius of optical fiber.
Cable cut-off wavelength: being that optical signal is transmitted in a fiber after 22 meters according to the cable cut-off wavelength that IEC is defined
It is not re-used as the wavelength that single mode signal is propagated.It needs to obtain by testing after looping to optical fiber in test.
Solution before is built using G.655 optical fiber cooperation erbium-doped fiber amplifier (EDFA) and dispersion compensation module
If Metropolitan Area Network (MAN).G.655 optical fiber is 12ps/nm/km in the dispersion representative value of 1550nm, and attenuation representative value is 0.22dB/km.This hair
Bright another thinking solved the problems, such as that proposes: a kind of dispersion shifted optical fiber of low dispersion values is designed, builds it in Metropolitan Area Network (MAN)
If dispersion compensation module is not necessarily in.Increase the effective area of optical fiber, improves injected optical power, while reducing the loss of optical fiber, it can
To effectively improve span length, erbium-doped fiber amplifier is not necessarily in establishing of MAN.
The present invention is by solving the problems, such as the technical solution set forth above taken are as follows: the fuse radius r1 of optical fiber be 2.5~
3.5 μm, sandwich layer relative fefractive index difference △ n1 is+0.45%~+0.55%, and sandwich layer is doped to Cl and Ge；First cladding radius r2
It is 4.0~5.0 μm, relative fefractive index difference △ n2 is -0.08%~-0.11%, and first is clad doped for F doping；Second covering
Radius r3 is 7.5~9 μm, and relative fefractive index difference △ n3 is+0.12%~+0.17%, and second is clad doped for Ge, F codope；
Third cladding radius r4 is 10~12 μm, and relative fefractive index difference △ n4 is -0.03%~-0.05%, and third is clad doped to mix for F
It is miscellaneous；Outermost layer is pure silicon dioxide, and radius is 62.5 μm.The center relative refractive index difference of fiber design is larger, is because in this way
Dispersion shift purpose may be implemented.Unlike bibliography, the core design that the present invention is adulterated using Cl and Ge, because of Cl
The refractive index of sandwich layer can be effectively increased but the rayleigh scattering coefficient of optical fiber can be reduced, it in this way can be in high-speed wire-drawing
Effectively reduce fibre loss.Fibre core does not mix alkali metal K in the present invention, is because fibre core is doped with more GeO2,GeO2In glass
It is also network body in glass network, but its bond energy and SiO2Difference is big, therefore effectively reduces the viscosity of network body, inherently may be used
To match the temperature field of wire drawing.Secondly, present invention employs two to mix the recessed covering of F, the purpose is to reduce the cut-off wave of optical fiber
Long and reduction bending loss.
Doped with the GeO of 8.5-10.5mol% in fuse2Cl with 0.5wt%-0.8wt% is to reach the opposite folding of design
It is poor to penetrate rate, and it is this doped be conducive to matching inside of optical fibre stress therefore use design of the invention can be with high-speed wire-drawing condition
The lower attenuation by optical fiber 1550nm is reduced to 0.185dB/km or less.Its drawing speed can be from 600m/min to 1800m/
min。
Sandwich layer, the first covering, the second covering and third covering are prepared using PCVD technique, center core layer, the first covering, the
Two coverings and third covering are in PCVD technique according to the SiCl of calculating4Flow, GeCl4Flow quantitatively evaporates and C2F6、O2Flow
It is uniformly mixed in pipeline, is then delivered to plasma area and is chemically reacted, generate required waveguiding structure.
Sandwich layer is the viscosity in order to match inside of optical fibre with the main purpose designed of adulterating of the first, second and third covering, favorably
In reduce optical fiber 1550nm attenuation.
Prefabricated rods after the completion of deposition are lifted to melt and carry out being collapsed into solid mandrel in contracting equipment, finally according to pure the two of calculating
Silica carries out wire drawing after covering pipe sleeve outside the prefabricated rods.
The temperature of wire drawing be 1900 DEG C to 2000 DEG C, delivery speed be 4.5~10mm/min, drawing speed be 1200~
1800m/min, optical fiber is by high-temperature region, and behind annealed zone and cooling zone, into a double application system, interlayer coatings and outer layer are applied
Expect while multiple solidification equipments carry out interlayer coatings and outer layer coating solidifies simultaneously coated in then passing through outside bare optical fiber.Light
Fibre is by high-temperature region, behind annealed zone and cooling zone, can also enter first of applicator and solidify, after coating diameter be 185~
It 200 μm, then enters back into second applicator and solidifies, diameter is 242~252 μm after coating.Optical fiber designed by the present invention
Because bending loss is smaller, the added losses applied after stranding are also smaller, are suitble to multiple use such as Metropolitan Area Network (MAN) or residence network,
Meanwhile optical fiber is smaller and flat in the dispersion of C+L band, can be applied to a variety of transmission modes without dispersion compensation.Meanwhile this
The designed optical fiber of invention is greater than 75 μm in 1550nm effective area2, the nonlinear factor of optical fiber is increased, can be injected bigger
The signal light of power, loss of the optical fiber in 1550nm are less than or equal to 0.185dB/km, increase the signal-to-noise ratio of network, can be substantially
Degree improves transmission range, reduces the bit error rate of system design, can reduce the construction cost of the networks such as communication Metropolitan Area Network (MAN).Meanwhile
Using each layer doping formula of optical fiber of the invention, low-loss large effective area dispersion position can be obtained under the conditions of high-speed wire-drawing
Single mode optical fiber is moved, fiber manufacturing cost is reduced.The optical fiber property of test is as follows: the mode field diameter of 1550nm is 9.78 μm, is had
75 μm of area of effect2, zero-dispersion wavelength 1485nm is 2.3ps/nm/km to 7.9ps/nm/ in the dispersion values of 1530nm~1625nm
Between km, the chromatic dispersion gradient of 1550nm is 0.06ps/nm2/ km, fiber cut off wavelength 1485nm.Exist in 1550nm bending loss
1 circle is 0.008dB under 16mm bending radius.
(4) Detailed description of the invention
Fig. 1 is low-loss large effective area dispersion shifted single mode fiber diagrammatic cross-section, and r1 represents fiber core radius, opposite
Refringence is indicated with Δ n1 on the diagram；R2 represents first and shallowly mixes F cladding radius, and relative fefractive index difference uses Δ n2 on the diagram
It indicates；R3 represents second layer cladding radius, and relative fefractive index difference is indicated with Δ n3 on the diagram；R4 represents second and shallowly mixes F packet
Layer radius, relative fefractive index difference are indicated with Δ n4 on the diagram；R5 is exactly pure silicon dioxide cladding radius, and usually 62.5 μm.
Fig. 2 is the dispersion curve figure of low-loss large effective area dispersion shifted single mode fiber.Zero-dispersion wavelength is
1491.2nm, the dispersion values at 1550nm are 3.26ps/nm/km, and the chromatic dispersion gradient of this wavelength is 0.06ps/nm2/ km,
Dispersion values at 1625nm are 7.96ps/nm/km.
(5) specific embodiment
The embodiment illustrated in further detail below.
Silicon tetrachloride, oxygen and carbon hexa fluoride are passed first into using PCVD method and are deposited on quartz reaction inside pipe wall formation third
Covering then passes to silicon tetrachloride, germanium tetrachloride, oxygen and carbon hexa fluoride and deposits to form the second covering, then be passed through silicon tetrachloride,
Oxygen and carbon hexa fluoride deposit to form the first covering, then are passed through silicon tetrachloride, germanium tetrachloride, oxygen and carbon hexa fluoride and deposit to be formed
Sandwich layer is formed, the deposition flow proportional of sandwich layer is by special optimization to increase sandwich layer Cl content.After the completion of deposition, it will have
The reaction tube collapsing in heart hole obtains solid preform.
Design fibre profile of the invention and parameter are as shown in table 1:
Test optical fiber data of the invention are as shown in table 2:
Infuse *: the unit of dispersion is ps/nm/km, and the unit of chromatic dispersion gradient is ps/nm2/km；
Test optical fiber data of the invention are as shown in table 3:
Design parameter in above embodiments is although preferably, above-described embodiment also retouch in detail to the present invention
It states, but those skilled in the art is, it will be observed that without departing from the spirit and scope of the present invention can also be in form
Or a variety of variations are made in details.
Claims (9)
1. a kind of low-loss large effective area dispersion shifted single mode fiber, the fiber core radius r1 of optical fiber is 2.5~3.5 μm, sandwich layer
Relative fefractive index difference △ n1It is+0.45%~+0.55%, sandwich layer is doped to Cl and Ge；First cladding radius r2 is 4.0~5.0 μ
M, relative fefractive index difference △ n2It is -0.08%~-0.11%, first is clad doped for F doping；Second cladding radius r3 is 7.5
~9 μm, relative fefractive index difference △ n3 is+0.12%~+0.17%, and second is clad doped for Ge, F codope；Third covering half
Diameter r4 is 10~12 μm, and relative fefractive index difference △ n4 is -0.03%~-0.05%, and third is clad doped to be adulterated for F；Outermost layer
For pure silicon dioxide.
2. optical fiber according to claim 1 is manufactured using PCVD technique, it is Si respectively that fibre core, which includes four kinds of elements, O, Ge and
Cl；Wherein the weight ratio of Cl accounts for 0.5% to 0.8%, GeO of glass of fiber core weight2Molar ratio account for the 8.5% of fibre core and arrive
10.5%.
3. optical fiber according to claim 1, it is characterised in that: the zero-dispersion wavelength of optical fiber is less than 1500nm.
4. optical fiber according to claim 1, it is characterised in that: optical fiber 1550nm dispersion values in 3~5ps/nm/km range
It is interior；It is 2.0ps/nm/km between 8.0ps/nm/km in the dispersion values of 1530nm~1625nm, the chromatic dispersion gradient of 1550nm≤
0.06ps/nm2/km。
5. optical fiber according to claim 1, it is characterised in that: optical fiber is 9.6 ± 0.4 μm in the mode field diameter of 1550nm, is had
It imitates area and is greater than 75 μm2。
6. optical fiber according to claim 1, it is characterised in that: optical fiber is less than or equal in the attenuation of 1550nm wavelength
0.185dB/km。
7. optical fiber according to claim 1, it is characterised in that: drawing speed of optical fiber is greater than 1200m/min, preferred wire drawing speed
Degree is 1600m/min.
8. optical fiber according to claim 1, it is characterised in that: the cutoff wavelength of the optical fiber is less than or equal to 1500nm.
9. optical fiber according to claim 1, it is characterised in that: the bending loss of the optical fiber at 1550nm wavelength, with
The circle of 16mm bending radius 1 is then less than or equal to 0.01dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910341229.4A CN110058350A (en) | 2019-04-25 | 2019-04-25 | A kind of low-loss large effective area dispersion shifted single mode fiber and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910341229.4A CN110058350A (en) | 2019-04-25 | 2019-04-25 | A kind of low-loss large effective area dispersion shifted single mode fiber and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110058350A true CN110058350A (en) | 2019-07-26 |
Family
ID=67320865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910341229.4A Pending CN110058350A (en) | 2019-04-25 | 2019-04-25 | A kind of low-loss large effective area dispersion shifted single mode fiber and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110058350A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000162462A (en) * | 1998-11-23 | 2000-06-16 | Alcatel | Dispersion compensating fiber for wavelength-divided multiple optical fiber transmission system using dispersion shift type line fiber |
| JP2003075674A (en) * | 2001-08-31 | 2003-03-12 | Hitachi Cable Ltd | Low-nonlinearity low-dispersion slope optical fiber |
| CN1434309A (en) * | 2002-01-22 | 2003-08-06 | 株式会社藤仓 | Optical fibre and transmission path |
| CN1667437A (en) * | 2004-03-09 | 2005-09-14 | 株式会社藤仓 | Dispersion compensating fiber module and optical fiber transmission line |
| CN107247305A (en) * | 2017-07-04 | 2017-10-13 | 长飞光纤光缆股份有限公司 | Low decay single-mode fiber and preparation method thereof |
-
2019
- 2019-04-25 CN CN201910341229.4A patent/CN110058350A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000162462A (en) * | 1998-11-23 | 2000-06-16 | Alcatel | Dispersion compensating fiber for wavelength-divided multiple optical fiber transmission system using dispersion shift type line fiber |
| JP2003075674A (en) * | 2001-08-31 | 2003-03-12 | Hitachi Cable Ltd | Low-nonlinearity low-dispersion slope optical fiber |
| CN1434309A (en) * | 2002-01-22 | 2003-08-06 | 株式会社藤仓 | Optical fibre and transmission path |
| CN1667437A (en) * | 2004-03-09 | 2005-09-14 | 株式会社藤仓 | Dispersion compensating fiber module and optical fiber transmission line |
| CN107247305A (en) * | 2017-07-04 | 2017-10-13 | 长飞光纤光缆股份有限公司 | Low decay single-mode fiber and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101101354B (en) | Fluorine doped optical fiber | |
| CN102411168B (en) | Low loss optical fiber designs and methods for their manufacture | |
| CN102798927B (en) | Single-mode fiber and manufacture method thereof | |
| US7946135B2 (en) | Extended-baking process for glass deposition tubes | |
| CN103323908B (en) | Single mode fiber and manufacturing method thereof | |
| CN102819063A (en) | Single-mode optical fiber and manufacturing method thereof | |
| CN104991306A (en) | Ultra-low attenuation bend-insensitive single-mode fiber | |
| CN100371747C (en) | Bending non-sensitive fibre optical with moderate modulus filed diameter | |
| CN104316994A (en) | Low-attenuation bending insensitive single mode fiber | |
| CN104698534A (en) | Low-attenuation few-mode fiber | |
| US20040055341A1 (en) | Dispersion flattened fiber with high negative dispersion and method for the manufacture thereof | |
| WO2022027796A1 (en) | Bend-resistant optical fiber manufacturing method and optical fiber corresponding thereto | |
| CN104216045A (en) | Optical fiber and manufacturing method thereof | |
| CN107678088A (en) | The single-mode fiber of low attenuation large effective area | |
| CN104714273A (en) | Low-attenuation and few-mode fiber | |
| CN109298482A (en) | A kind of large-effective area single mode fiber of low decaying and low bend loss | |
| CN107608023A (en) | A kind of ultralow decay less fundamental mode optical fibre of step change type | |
| CN103472525B (en) | Low-loss large-effective area single mode fiber and manufacturing method thereof | |
| CN104898201B (en) | A kind of single-mode fiber of ultralow attenuation large effective area | |
| EP0062450A1 (en) | Production of optical fibres | |
| CN101718888B (en) | Dispersion compensation fiber and module thereof | |
| CN107193079A (en) | A kind of single-mode fiber of low attenuation large effective area | |
| CN116209930A (en) | Low crosstalk multi-core optical fiber for single mode operation | |
| CN101226258B (en) | Single mode fibre with low bending loss and low nonlinear effect | |
| JP2007297254A (en) | 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 |