CN104876436B - The manufacturing method and equipment of low polarization mode dispersion optical fiber - Google Patents
The manufacturing method and equipment of low polarization mode dispersion optical fiber Download PDFInfo
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- CN104876436B CN104876436B CN201510321106.6A CN201510321106A CN104876436B CN 104876436 B CN104876436 B CN 104876436B CN 201510321106 A CN201510321106 A CN 201510321106A CN 104876436 B CN104876436 B CN 104876436B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 130
- 239000006185 dispersion Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 230000010287 polarization Effects 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000012681 fiber drawing Methods 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 4
- 241000209094 Oryza Species 0.000 claims description 11
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- 238000005457 optimization Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 description 17
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000007380 fibre production Methods 0.000 description 6
- 238000005491 wire drawing Methods 0.000 description 5
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- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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Abstract
A kind of manufacturing method and equipment of the low polarization mode dispersion optical fiber of optical fiber fabrication arts, including：The optical fiber test equipment below fiber drawing furnace is set to, PMD strandings turn control device and turns the closed loop control module that control device is connected with optical fiber test equipment and PMD strandings respectively, wherein：Closed loop control module obtains actual measurement optical fiber spin values from optical fiber test equipment, corresponding stranding rotary speed is exported after analyzing and processing and is instructed to PMD strandings turns control device, realizes that automatic adjustment is rubbed with the hands and turns.The present invention is by spin values with twist relationships, to reduce spin difficulty is brought so as to reduce fine follow-up cabling process so as to reduce twist, and with the PMD strandings of optical fiber turn control device using one on-line testing index parameter of optical fiber and form automated closed-loop to control, efficiently solve that optical fiber index is out of control and scrap problem.
Description
Technical field
The present invention relates to a kind of technologies of optical fiber fabrication arts, and specifically a kind of PMD Coefficient is 0.015
The optical fiber and its manufacturing method of left and right.
Background technology
In recent years, to meet growing bandwidth demand, Fiber Optical Communication System has achieved huge progress.Particularly
When single mode optical fiber is used widely, as the reform polarization mode dispersion of technology has become one of restriction fiber optic applications
Important factor.Optical fiber self-defect may increase PMD (polarization mode dispersion), for example geometry and pressure asymmetry will lead to two kinds partially
Pattern of shaking is transmitted with different group rates in single mode optical fiber.In digital transmission system, PMD will cause pulse to divide discrete pulses exhibition
Width so as to limit bit rate and transmission range, restricts the bandwidth of optical fiber transmission, is that the major technique of high speed optical fiber communication is difficult
One of point.
Past 10 years, people did a large amount of effort with regard to how to reduce system PMD.There are mainly two types of method, first, improving
Symmetry of the optical fiber in terms of refractive index and side pressure, this mainly improves in optical fiber production process, ensures fiber geometries performance simultaneously
Lower optical fiber side pressure.Another method is to control polarization mode coupling by drawing optical fibers.Optical fiber drawing art is in last century
90 epoch started to be applied to optical fiber production, and were proved to be the effective scheme for reducing fiber PMD, mainly using Mode Coupling mode
To control birefringent phenomenon.
This is in single mode optical fiber transmission, and the basic mode of light wave is containing there are two orthogonal polarization states.In practical optical fiber,
Due to geometric dimension inhomogeneities and internal stress inhomogeneities, two orthogonal polarization modes are propagated at different rates, because
And the time for reaching the optical fiber other end is also different, so as to cause the phase difference between two patterns, and it is " double that the optical fiber is claimed to show
Refraction ".
Since the polarization mode dispersion (PMD) of optical fiber is referred to by optical fiber parameter itself in practical optical fiber production process
It is marked with and the influence of the factors such as the situation of wire-drawing equipment, when same wire-drawing equipment draws same prefabricated rods, the PMD of optical fiber is rubbed with the hands
Turn control device and be difficult to adopt an identical technological parameter to reach the optical fiber polarisation pattern dispersion level of identical controlled level；
And the test of optical fiber polarisation pattern dispersion is an off-line procedure, this is the process of a delay, this is controlled to optical fiber production
Process brings difficulty, and easily since deferring procedure causes optical fiber index out of control and scraps.
Still further aspect is to carrying out ceaselessly rubbing in optical fiber both direction since the PMD strandings of optical fiber turn control device
Process, particularly when this stranding turn asymmetry it is excessive when, be easy to causeing the offline torsion of optical fiber, (twist, i.e. optical fiber complete to draw
After silk, after dividing disk to small fiber reel by drum, its free plumbness is allowed, to observe the number of turns of fiber spinning, conventional unit is
Circle/rice) it is excessive, this brings difficulty to the follow-up cabling process of optical fiber, particularly in the production process of cable.
In terms of how effectively solving the problems, such as two above, become faced in optical fiber production field in recent years one it is important
Challenge.
By to the retrieval of prior art discovery, U.S. Patent number US 5,298,047, which is disclosed, to be given optical fiber one and has
Constant spatial frequency is alternately rotated, so as to which optical fiber be made to have variable spaces swing circle, so as to control in optical fiber production
Birefringent phenomenon.Although the technology solves the problems, such as reduction fiber PMD coefficient in production control, but in actual production process
It is off-line procedure feature that can not solve due to the test of optical fiber polarisation pattern dispersion, easily since deferring procedure causes optical fiber index
It is out of control and scrap；Also can not solve to rub with the hands turn asymmetry it is excessive when, the twist for be easy to causeing optical fiber is excessive, this is to after optical fiber
Continuous cabling process brings difficult problem.
It is maximum ellipse by having that Chinese patent literature CN 1519212A disclose a kind of combination using indivedual speeds of rotation
The specific method in side of the optical fiber of prefabricated component manufacture low polarization mode dispersion (PMD) that circularity is about 3%.Specific light during drawing
The combination of the speed of rotation is repeated after fine length, thus effectively reduces the PMD of embedding cable optical fiber.But the technology can not solve due to
Deferring procedure causes optical fiber index out of control and scraps；Also can not solve rub with the hands turn asymmetry it is excessive when, be easy to cause optical fiber
Twist is excessive, this brings difficult problem to the follow-up cabling process of optical fiber.
Chinese patent literature CN102584001A, open (bulletin) day, 2012.07.18 disclose one kind and are based on to compile
The Wiredrawing automatic ending control system and its control method of range controller, based on programmable controller (PLC) and man-machine interface
Wiredrawing automatic ending control system and its control method are automatic decision defect of optical fiber in optical fiber manufacturing processes, and are carried out automatic
Finish up the system controlled.Including online detection fiber defect device, automatically cut off optical fiber and connect application device, polarizing coating dispersion turn round
Rub automatic flip device, programmable controller and host computer with the hands；On-line checking defect of optical fiber device includes optical fiber measurement and pops one's head in and believe
Number processor；It automatically cuts off optical fiber and connects application device and be provided with two sets, respectively once automatically cut off optical fiber and connect coating dress
It puts and automatically cuts off optical fiber with secondary and connect application device；Polarizing coating dispersion, which is turned round, rubs automatic flip device with the hands mounted on secondary coating curing
Stove lower part, polarizing coating dispersion turn round stranding automatic flip device and include turning round stranding guide wheel, turn round stranding motor, automatically spring open cylinder and horizontal cloud
Platform.The technology is only to provide one and carries out safeguard measure to PMD rubbings equipment, i.e., the polarizing coating dispersion torsion when detection fiber defect
Twist device automatically springs open, but the technology can not be solved since deferring procedure causes optical fiber index out of control and scraps；Also it can not solve
Certainly rub with the hands turn asymmetry it is excessive when, the twist for be easy to causeing optical fiber is excessive, this brings difficulty to ask to the follow-up cabling process of optical fiber
Topic.
Invention content
The present invention proposes a kind of manufacturer of stable low polarization mode dispersion optical fiber for deficiencies of the prior art
Method and equipment, since birefringent phenomenon is affected by several problems, existing optics aspect, also there are mechanical aspects, and
Reversely i.e. the variation of direction of rotation has adverse effect for PMD for rotation.This is because in rotation zones of inversions, rotation is relatively low, double
Refraction modulus is not sufficiently averaged, and the raising of local PMD is caused in direction of rotation, then PMD is higher.Therefore the present invention is by online
Process feedback signal eliminates the influence caused by the deferring procedure of the prior art, out of control and scrap so as to reduce optical fiber index；
By reversing online, (spin weighs physical quantity of the optical fiber in drawing process, due to optical fiber inherent parameters and wire drawing to the present invention
Tower causes optic fibre turning, conventional unit is circle/rice to the symmetrical sex differernce of optical fiber active force) with twist relationships, to drop
Low spin brings difficulty, and refer to using one on-line testing of optical fiber so as to reduce twist so as to reduce fine follow-up cabling process
Mark parameter turns one automated closed-loop control of control device formation with the PMD strandings of optical fiber and effectively solves the problems, such as two above.
The present invention is achieved by the following technical solutions：
The present invention relates to a kind of manufacturing methods of stable low polarization mode dispersion optical fiber, include the following steps：
The real-time measured value M of the torsion online of optical fiber that step 1) detection is exported from fiber drawing furnace, unit are circle/rice；
Step 2) compares the difference of M values and default optical fiber torsion value W online, and calculating PMD strandings and turning control device needs to adjust
Whole rubbing angleRubbing perimeterWherein：X turns real-time rubbing angle clockwise in control device to rub with the hands
Degree subtracts rubbing angle counterclockwise (unit is °), and y is real-time rubbing perimeter；
Rubbing angle-data and rubbing perimeter are converted level analogue signals in order to control and export to PMD to rub with the hands by step 3) turns control
Control equipment realizes manipulation.
The present invention relates to a kind of manufacturing equipment of stabilization low polarization mode dispersion optical fiber for realizing the above method, including：Setting
Optical fiber test equipment, PMD strandings below fiber drawing furnace turn control device and rub with the hands with optical fiber test equipment and PMD respectively to turn control
The closed loop control module that equipment is connected, wherein：Closed loop control module obtains actual measurement optical fiber spin values from optical fiber test equipment, through dividing
Corresponding stranding rotary speed is exported after analysis processing and is instructed to PMD strandings and turns control device, realizes that automatic adjustment is rubbed with the hands and turns.
The closed loop control module includes：Data acquisition unit, feedback computing unit and operation execution unit, wherein：
Data acquisition unit is connected with optical fiber test equipment and exports the collected real-time measured value of torsion to feedback computing unit,
Feedback computing unit is connected with operation execution unit and rubbing angle and rubbing perimeter after calculation optimization, operation execution unit will
The result of calculation of feedback computing unit, which converts level in order to control and exports to PMD strandings, to be turned in control device.
Rubbing angle-data after optimization and rubbing perimeter are exported to operation and perform list by the feedback computing unit
Rubbing angle-data and rubbing perimeter are converted level analogue signals in order to control by operation execution unit and exported to PMD by member
Stranding turns control device, realizes manipulation.
Technique effect
Compared with prior art, the present invention can produce stable online spin values optical fiber, while the optical fiber produced
It can be very good satisfaction and the optical fiber index with cable.Due to and with the optical fiber that needs of cable must have optical fiber small as possible and turn round offline
It the twist of revolution word (twist), only optical fiber digital hours, can just reduce and with the operating difficulties in cable cabling process.
Description of the drawings
The fiber PMD coefficient distribution that Fig. 1 is produced using common PMD apparatus control methods.
Fig. 2 fiber PMD coefficient distributions of the present invention.
Fig. 3 is spin in embodiment with the correspondence between twist.
Fig. 4 is embodiment operational flowchart.
Fig. 5 on-line testings equipment is the same as one closed-loop control figure of PMD equipment.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
As shown in Figure 4 and Figure 5, the present embodiment includes：It is set to the optical fiber test equipment 220 below fiber drawing furnace, PMD is rubbed with the hands and turned
Control device 250 and turn the closed loop control module that control device 250 is connected with optical fiber test equipment 220 and PMD strandings respectively
280, wherein：Closed loop control module obtains actual measurement optical fiber spin values from optical fiber test equipment, is exported after analyzing and processing corresponding
It rubs rotary speed with the hands and instructs to PMD strandings and turn control device, realize that automatic adjustment is rubbed with the hands and turn.
The closed loop control module includes：Data acquisition unit, feedback computing unit and operation execution unit, wherein：
Data acquisition unit be connected with optical fiber test equipment 220 and online obtain the real-time measured value M of spin, feedback computing unit according to
M and default optical fiber are calculated the operating parameter after optimization in line torsion value W and export to operation execution unit, and operation performs list
Member turns control device Unit 250 with PMD strandings and is connected and according to the operating parameter output control level after optimization to closed-loop control mould
In block 280.
As shown in figure 3, fitted figure is associated between spin and twist, according to the curvilinear equation y being fitted in the figure
=0.2249*e0.213x, wherein：Y is twist values, and x Spin, e are natural logrithm, and the light of spin ranges can be determined in production
Required corresponding twist is set in the case of fibre：If you need to produce optical fiber of the corresponding SPIN between 2 to 4, can be obtained by Fig. 3
It is desirable that between the offline torsion of optical fiber is 0.3 to 0.35, and be linear corresponding relation according to the same online torsion of offline torsion, it can
To set online torsion W values as between 6 to 12；If you need to produce optical fiber of the corresponding SPIN between 4 to 6, can be obtained by Fig. 3 needs
What is wanted is that torsion between 0.35 to 0.45, and according to offline torsion with online torsion is linear corresponding relation to optical fiber offline, can
To set online torsion W values as the number between 12 to 20.
The present embodiment includes the following steps：
Optical fiber 210 first passes around optical fiber test equipment 220 after being pulled out from fiber drawing furnace, optical fiber on-line testing equipment can lead to
It crosses optical principle and measures optical fiber and reverse online, by long cooling tube 230, rubbed with the hands using coating and curing system 240, PMD
Turn control device 250, be most wound on spooling equipment 270 after traction guide wheel 260 online afterwards, adding in one in whole process closes
Optical fiber test equipment 220 and PMD strandings are turned control device 250 and are associated with by closed loop control module 280, such as by ring control system
Shown in Fig. 5.
In the present embodiment, the closed loop control module 280 is realized by PLC, for example, set in PLC optical fiber spin as
It is 14.2 circles/rice when PLC obtains the practical spin of optical fiber, PLC aut signs turn control device to PMD strandings during 10 circles/rice
250 reduce the online rubbing of optical fiber by changing the technological parameter of PMD stranding turn controls automatically, and optical fiber reality is obtained so as to reach PLC
The border spin values purpose consistent with setting optical fiber spin values in PLC.
It is 7.8 when PLC obtains the practical spin of optical fiber when for another example setting optical fiber sets spin as 10 circles/rice in equipment PLC
Circle/rice, PLC aut signs to PMD stranding turn control device 250 by change automatically PMD rub with the hands turn control technological parameter come
Increase the online rubbing of optical fiber, to obtain the practical spin values of optical fiber consistent with optical fiber is set to set spin values in PLC so as to reach PLC
Purpose.
When the rubbing angle counterclockwise that PMD strandings turn control device is z, then rubbing angle clockwise is z+x, rubbing Zhou Changwei
y；The PMD rubbing equipment control parameters that closed loop control module 280 will calculate optimization are：Rubbing angle counterclockwise is z, up time
Needle rubbing angle isRubbing Zhou ChangweiClosed loop control module 280 in this way is by these data transmissions
Turn control device adjust automatically rubbing parameter to PMD strandings, last PMD strandings turn control device the parameter after adjustment is produced it is new
" X " and " Y " is fed back in closed loop control module 280 in real time, is thusly-formed a loop control.
As shown in Figure 1, fiber PMD index profile when this control system is not used for common wire-drawer-tower, Fig. 2 is draws
Silk tower uses fiber PMD index profile during this control system, and PMD coefficients have low Normal Distribution Characteristics.By this two
Figure can effectively control fiber PMD index it can be seen that using after control system as shown in Figure 2, steady so as to obtain manufacture
Determine low polarization mode dispersion optical fiber, reach stable fiber parameter index function, reduce and scrapped in optical fiber large-scale production control, improve light
Fine qualification rate improves the bandwidth of optical fiber transmission.
Embodiment 2
It is same as Example 2, when setting spin ranges are adjusted to 1.5 to 5 circles/rice, the optical fiber that is produced not only optical fiber
The distribution of PMD coefficients is narrow, and twist numerical value is very low, in 0.18-0.33 circles/rice range.It is given birth in this way using this case study on implementation
The optical fiber of the production not only PMD coefficients narrowly distributing of optical fiber and low, and this optical fiber can be very good to meet and the production with cable will
It asks.
Claims (1)
1. the optical fiber optimization production method of a kind of manufacturing equipment based on low polarization mode dispersion optical fiber, which is characterized in that described to set
It is standby to include：Be set to the optical fiber test equipment below fiber drawing furnace, PMD stranding turn control device and respectively with optical fiber test equipment and
PMD strandings turn the closed loop control module that control device is connected, wherein：The closed loop control module that PLC is realized is obtained from optical fiber test equipment
The real-time measured value of torsion online of optical fiber is obtained, corresponding stranding rotary speed is exported after analyzing and processing and is instructed to PMD stranding turn controls
Equipment is realized that automatic adjustment is rubbed with the hands and is turned；The closed loop control module includes：Data acquisition unit, feedback computing unit and operation
Execution unit, wherein：Data acquisition unit is connected with optical fiber test equipment and exports the collected real-time measured value of torsion
To feedback computing unit, feedback computing unit is connected with operation execution unit and the rubbing angle after calculation optimization and rubbing are all
Long, the result of calculation for feeding back computing unit is converted level in order to control and exported to PMD strandings by operation execution unit turns control device
In；
The method includes the following steps：
Step 1) data acquisition unit collects the real-time measured value M of torsion online of optical fiber, unit from on-line testing equipment
For circle/rice；
Step 2) data acquisition unit exports M numerical value respectively into feedback computing unit, feedback computing unit comparison M values and pre-
If the difference of optical fiber torsion value W online, calculate PMD strandings and turn the rubbing angle that control device needs adjustRubbing
PerimeterWherein：X turns real-time rubbing angle clockwise in control device for stranding and subtracts rubbing angle counterclockwise, and y is real
When rubbing perimeter；
Step 3) feedback computing unit exports the rubbing angle-data after optimization and rubbing perimeter to operation execution unit, leads to
It crosses operation execution unit and rubbing angle-data and rubbing perimeter is converted level analogue signals in order to control and export to PMD to rub with the hands and turn control
Control equipment realizes manipulation；
Step 4) data acquisition unit further acquired by on-line testing equipment based on the rubbing angle-data after optimization and
The real-time measured value of torsion for the optical fiber that rubbing perimeter is prepared, realizes dynamic auto adjustment；
When PMD strandings turn the rubbing angle counterclockwise of control device as z, then rubbing angle clockwise is z+x, rubbing Zhou Changwei y, then
Corresponding to the PMD rubbing equipment control parameters optimized is：Rubbing angle counterclockwise is z, rubbing angle clockwise isRubbing Zhou Changwei
The online slew range is 1.5~5 circles/rice.
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| CN201510321106.6A CN104876436B (en) | 2015-06-12 | 2015-06-12 | The manufacturing method and equipment of low polarization mode dispersion optical fiber |
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| CN201510321106.6A CN104876436B (en) | 2015-06-12 | 2015-06-12 | The manufacturing method and equipment of low polarization mode dispersion optical fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2004050573A1 (en) * | 2002-09-25 | 2004-06-17 | Giacomo Stefano Roba | Process for producing an optical fiber having a low polarization mode dispersion |
| CN101255005B (en) * | 2008-04-10 | 2012-03-07 | 中天科技光纤有限公司 | Production method of ultralow-polarization dispersive single-mode fiber |
| RU2616766C2 (en) * | 2012-03-05 | 2017-04-18 | Призмиан С.П.А. | Method for detecting twist in cable, power supply cable with twisting sensor and methods of making such cable |
| CN104529149B (en) * | 2014-12-04 | 2017-06-20 | 中天科技光纤有限公司 | A kind of system and method for the intelligent on-line automatic regulation rubbing patterns of FSU |
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