CN1959450A - Method suitable to large preform rod in high speed to produce single-mode optical fiber in low dispersion of polarization method - Google Patents
Method suitable to large preform rod in high speed to produce single-mode optical fiber in low dispersion of polarization method Download PDFInfo
- Publication number
- CN1959450A CN1959450A CNA2006101248584A CN200610124858A CN1959450A CN 1959450 A CN1959450 A CN 1959450A CN A2006101248584 A CNA2006101248584 A CN A2006101248584A CN 200610124858 A CN200610124858 A CN 200610124858A CN 1959450 A CN1959450 A CN 1959450A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- fiber
- high speed
- rubbing
- component
- 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
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
- C03B37/02745—Fibres having rotational spin around the central longitudinal axis, e.g. alternating +/- spin to reduce polarisation mode dispersion
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/03—Drawing means, e.g. drawing drums ; Traction or tensioning devices
- C03B37/032—Drawing means, e.g. drawing drums ; Traction or tensioning devices for glass optical fibres
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/10—Non-chemical treatment
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/36—Dispersion modified fibres, e.g. wavelength or polarisation shifted, flattened or compensating fibres (DSF, DFF, DCF)
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/06—Rotating the fibre fibre about its longitudinal axis
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
A method of utilizing high speed prefabricated bar to prepare optical fiber of low polarization mode dispersive single mode type includes fixing prefabricated bar on bar feeding mechanism with rotary holder at top of wiredrawing furnace for carrying out rotating white wiredrawing, forcing wiredrawn optical fiber to be rotated around its axle by twisting system under action of torque then untwisting said optical fiber by untwisting unit to obtain optical fiber of low polarization mode dispersive single mode type.
Description
Technical field
The present invention relates to the manufacture method of single-mode fiber, is that a kind of suitable large preform rod in high speed manufacturing has the method for low polarisation mode dispersion single-mode fiber specifically.
Background technology
In recent years, along with people to the increasing rapidly of communication bandwidth requirements, on many national telecommunication backbone networks the single channel transfer rate just from the Gb/s level to the development of Tb/s level, this should give the credit to the application of Erbium-Doped Fiber Amplifier (EDFA) EDFA and some other optical device.Yet they have also brought a serious problem, and that is exactly to make originally small polarization effect, obtains accumulation as ill effects such as polarization mode dispersion PMD, polarized dependent loss PDLs, finally optical fiber telecommunications system has been produced the influence that can not be ignored.Because PDL mainly is the loss of being introduced by optoisolator, optical branching filter and optical filter,, promptly can not become the principal element of the high code check transmission of restriction in fact as long as guarantee these devices and polarization irrelevant.And PMD is signal constantly accumulation in transmission course, does not also have effective prevention or solution at present, and therefore many documents think that PMD has become the final restriction of high code check digital transmission.In addition, though the research at the PMD compensation has at home and abroad been carried out for many years, and several compensation schemes have been developed, but no matter be to adopt fixing or variable PMD balanced device, still adopt decomposing the method that back orthogonal directions signal compensates respectively, also have some unsatisfactory places technically.So, for fiber manufacturers, the origin of research PMD, optimize and the PMD performance of stable fiber is the task of top priority from manufacturing process.
Only propagate a kind of pattern in the single-mode fiber that general communication backbone is used, i.e. LP
01Mould or HE
11Mould, in fact, basic mode also is made up of the linear polarization mould of two mutually orthogonals.Desirable single-mode fiber should have desirable round symmetrical structure, makes the linear polarization mould of two quadratures in the optical fiber that same propagation characteristic, i.e. degenerate mode be arranged.But always there is imperfection in actual single-mode fiber, and the round symmetrical structure of optical fiber is destroyed, and causes the mould refractive index relevant with optical fiber basic mode pairwise orthogonal polarized component that difference is arranged, and just shows birefringent characteristic.If input optical pulse has encouraged two orthogonal polarization components, and with different group velocitys along Optical Fiber Transmission, will cause pulse strenching, this phenomenon is called polarization mode dispersion.
Experimental results demonstrate: for short fiber, the differential group delay DGD that is caused by polarization mode dispersion is directly proportional with fiber lengths; For long optical fibers, the differential group delay DGD that is caused by polarization mode dispersion is directly proportional with the square root of fiber lengths.Therefore, defined a polarization mode dispersion coefficient for long optical fibers:
PMD＝ΔT/z
1/2 (1)
When the length of optical fiber during much larger than the polarization mode coupling length, the DGD value Δ T of optical fiber is a random parameter, should satisfy Maxwell's probability distribution function, and its average is:
<ΔT(z)>＝(8/π)
1/2δT(z?L
c)
1/2 (2)
Wherein δ T is the intrinsic DGD on the unit length, L
cBe the polarization mode coupling length, and z is much larger than L
c, represent the optical fiber physical length.
It is generally acknowledged, cause that the factor that single-mode fiber produces birefringence and polarization mode dispersion has two classes: a kind of is the intrinsic factor, comprises fiber core non circularity (elliptical core), reverses (twist), simple bending (purebending), transverse stress (transverse pressure) distributes and axial stress (axial tension) distribution etc.; Another kind is extrinsic factor, comprises environmental factors such as temperature.Therefore, be to obtain lower polarization mode dispersion, most manufacturers adopt the symmetrical distribution of the core circularity of effective technology controlling and process optical fiber and stress to reduce the δ T and the L of optical fiber
cBecause these measures are limited technically, thus therefore research at present more be that the Mode Coupling that how to increase polarization mode effectively reduces δ T and L
c, in drawing process, increase the main direction that reversing of optical fiber becomes research consciously.
A kind of method that reduces PMD in the prior art is to make the prefabricated rods rotation in fiber draw process.For example, people such as Barlow: Applied Optics, 20:2962,1981; People such as Payne: IEEEJournal of Quantm Electronics, QE-18:477-487,1982; Rashleigh: " Fabrication of Circularly Birefringent Single Mode Fibers " NavyTechnical Disclosure Bulletin, 5:7-12,1980; And WO 83/00232 etc.Rotation causes the minimizing of PMD to be proportional to rotational speed.Regrettably, the asymmetry of handling typical optical fiber usually needs very high rotational speed, this makes this method only be used in low speed spillikin drawing process, and for present drawing speed surpassed the big stick-means of intimidation drawing process of 800m/min, the rotation prefabricated rods caused the reduction of PMD not have positive effect.
The another kind of method of prior art reduction PMD is below wire drawing or is called the device of the horizontal rubbing optical fiber of take-up end introducing, form the mechanical wave of horizontal direction rotation, utilize optical fiber this mechanical wave to be delivered to the softened zone of prefabricated rods in fiber drawing furnace as medium, the formation plastic deformation also is cured in the optical fiber of drawing, the method that this rotation causes PMD to reduce relatively is fit to present big stick-means of intimidation high-speed wire-drawing technology, and is extensively used by optical fiber manufacturer.。
Can find from Theoretical Calculation and actual test, the number of turns of every meter optic fibre turning depends on the frequency of drawing speed and motor rotation, not exclusively adapt to the PMD parameter that in present high-speed wire-drawing technology, significantly reduces optical fiber, in addition, can analyzing the periodicity reciprocating machinery of rubbing wheel in surface level from the structure of rubbing system, to reverse waveform (be the number of turns of reversing that the spatial frequency of optic fibre turning is defined as unit length optical fiber, circle/rice is along the distribution function of length of string direction) approach sine or cosine function, the waveform that reverses of optical fiber is sine or cosine function waveform in theory.Patent US005298047A, US005418881A, US006324872B1 and Chinese patent 97190345.X, 97191779.5 grades have been introduced a kind of typical rubbing mode, they are fit to high-speed wire-drawing technology in theory, and can form the waveform that reverses of non-sinusoidal function.Yet, the implementation of above-mentioned patent introduction has changed the path of optical fiber in original drawing process, make optical fiber depart from the collimation of system for drawing, this implementation at first is unfavorable for the technology controlling and process of normal drawing process, increased the difficulty of plant maintenance, increased the resistance that optical fiber is forced to rotate simultaneously, the rubbing system that the above-mentioned patent that weakened is introduced produces the ability of moment of torsion.In addition, it is that optical fiber closely contacts with the rubbing wheel surface that above-mentioned patent is introduced the precondition that the rubbing mode produces good rubbing effect, but the acting force between them derives from the horizontal component of wire drawing tractive force, its size depends on optical fiber and departs from the inclination angle of wire-drawing direction and the tractive force size of wire drawing at rubbing wheel surface place, consider the slip of optical fiber simultaneously at the rubbing wheel surface, can affirm that optical fiber inevitably can beat at the rubbing wheel surface (patent US005298047A and US005418881A clearly propose this drawback in summary of the invention), can not guarantee that the moment of torsion of rubbing wheel effectively is delivered to optical fiber.The patent No. is that 93109633.2 patent of invention discloses a kind of fibre-optic manufacture method with low polarisation mode dispersion, it still adopts above-mentioned similar rubbing system to reduce the polarization mode dispersion coefficient, the produced fiber cores circularity of method is low thus, fiber PMD is also undesirable, so it also is not suitable for the requirement of large preform rod in high speed drawing process.Along with the continuous expansion of fiber optic applications technical field and the requirement of manufacturing process, invent the method that a kind of suitable large preform rod in high speed manufacturing has the low polarisation mode dispersion single-mode fiber and be highly profitable.
Summary of the invention
Purpose of the present invention proposes a kind of suitable large preform rod in high speed manufacturing and has the method for low polarisation mode dispersion single-mode fiber in order to solve the above-mentioned drawback that prior art exists.
Technical scheme of the present invention is: preform is fixed on the bar feeding mechanism that has rotary chuck on fiber drawing furnace top, and deliver in the drawing heating furnace and to carry out wire drawing while rotating, under rubbing system introducing torsional interaction, make optical fiber be forced to rotate through the optical fiber after the wire drawing, carry out back twist by the back twist device again and obtain having the low polarisation mode dispersion single-mode fiber around its axis.The number of turns representative average that described optical fiber on average reverses is 2～60 circle/rice, and the optic fibre turning number of turns goes up the periodicity array configuration that distribution waveform can realize permanent width of cloth constant frequency and luffing frequency conversion component along its length, and the typical case reverses waveform and comprises three kinds of forms:
A, reverse waveform and in one-period, do not comprise the component of permanent amplitude and constant frequency rate and torsional component not;
B, reverse waveform and in one-period, comprise the component of permanent amplitude and constant frequency rate and torsional component not;
C, reverse waveform comprises permanent amplitude and constant frequency rate in one-period component, but do not comprise not torsional component.
The action that the rubbing wheel of described rubbing system forms comprises three kinds of forms: a pair of rubbing wheel is stabilized in vertical position simultaneously, a pair of rubbing wheel is stabilized in the inclination maximum position axisymmetrically, and the swing between vertical position and inclination maximum position axisymmetrically of a pair of rubbing wheel.Generally speaking, it is the performance that influences fiber products for fear of the mechanical wave propagation high dither that optical fiber produces because of the rubbing system that the rubbing wheel short time is stabilized in vertical position, it is in order to increase the number of turns of optical fiber horizontal torsion that the rubbing wheel short time rests on the inclination maximum position, and the reciprocally swinging of rubbing wheel between vertical position and inclination maximum position is to reverse waveform for the non-sinusoidal that makes optical fiber form frequency and amplitude disorder, increases the energy coupling that causes between the single-mode fiber polarization mode dispersion birefringence pairwise orthogonal component.
The full swing inclination angle representative value on described rubbing wheel plane, place is 5～20 degree.The described bar feeding mechanism that has rotary chuck has the prefabricated rods of making is advanced the function of rod and mated drawing speed while rotating the rod speed that advances, and spinfunction can be realized at the uniform velocity or be quickened to rotary chuck, also can realize unidirectional or two-way spinfunction.
The polarization mode dispersion coefficient of optical fiber of the present invention is not more than 0.03ps/km
1/2, it reverses waveform is periodically to repeat, comprising a fiber lengths that reverses waveform is 2～50 meters.
The used rubbing of the present invention system produces optical fiber and reverses, its action effect (mainly refer to the number of turns of every meter optic fibre turning and along the waveform that reverses of fiber length) can be controlled by the angle θ (as Fig. 3) of control rubbing wheel swing and the time-sharing ratio example of three kinds of action forms, and realization is to the reduction of dissimilar single-mode fiber PMD.The representative value of rubbing wheel plane, place inclination maximum is 5～20 °.Optimizing behind the technological parameter steady production can produce polarization mode dispersion coefficient representative value and be lower than 0.03ps/km
1/2The communication single mode optical fibre.
The back twist device of indication of the present invention is that the mode of utilizing the periodicity elastic torsion of optical fiber to cancel out each other under the interference that is subjected to guide wheel realizes, therefore, before receiving silk device, increase the distance that guide wheel quantity and optical fiber advance to receive silk device consciously, reach the purpose of back twist with the drawing speed that mates reality.
Beneficial effect of the present invention is:
1, adopt technical scheme of the present invention can significantly improve the thermal field homogeneity that prefabricated rods is heated in fiber drawing furnace;
2, adopt preform delivered in the drawing heating furnace by the bar feeding mechanism that has rotary chuck and carry out wire drawing while rotating, then optical fiber being introduced in the rubbing system makes optical fiber be forced to rotate around its axis under the torsional interaction, carry out this method of back twist by the back twist device again, guarantee the circularity of fibre core, reduced PMD in single-mode fiber.
3, adopt technical scheme of the present invention that reversing the number of turns and providing more alternative optic fibre turning waveforms to reduce PMD in single-mode fiber of single-mode fiber can be provided, make the PMD coefficient be lower than 0.03ps/km
1/2
4, adopt the driving force of the optic fibre turning that rubbing of the present invention system produces to derive from the friction force of the optical fiber that moves on the wire-drawing direction between taking turns with rubbing, being different from the driving force that adds of announcing the rubbing system directly acts on and optical fiber, make the number of turns of optic fibre turning not be subjected to the appreciable impact of drawing speed, be particularly suitable for high-speed wire-drawing technology;
5, because above-mentioned rubbing system does not change the path of optical fiber high-speed wire-drawing in installing and using process, be different from part and announced that the rubbing system changes the implementation in drawing optical fibers path, when introducing is reversed, avoid the possible high dither of optical fiber, when having reduced single-mode fiber PMD, do not influenced the stability of high-speed wire-drawing technology.
Description of drawings
Fig. 1 is the synoptic diagram of the inventive method.
Among the figure: the band rotary chuck enter excellent mechanism-1, fiber drawing furnace-2, silk footpath detection system-3, cooling system-4, application system-5, rubbing system-6, finished product fiber geometries size monitor-7, the back twist device--8, receive a silk system-9.
Fig. 2 analyzes synoptic diagram for the optical fiber radial force.
Fig. 3 is rubbing wheel pendulum angle synoptic diagram.
Fig. 4 a is that the typical case of the horizontal rubbing mode of pair roller reverses oscillogram.
Fig. 4 b is that the theory that single wheel is swung mode is continuously reversed oscillogram.
Fig. 4 c is that the attainable typical case of technical solution of the present invention reverses oscillogram.
Embodiment
Below in conjunction with embodiment the present invention is further described:
As shown in Figure 1, the present invention is fixed to preform to be furnished with on fiber drawing furnace 2 tops in the excellent mechanism 1 of advancing of rotary chuck, deliver in the drawing heating furnace 2 and to carry out wire drawing while rotating, the optical fiber that draws passes through bare fibre physical dimension watch-dog 3 successively, cooling system 4, application system 5, rubbing system 6, the drawing tensile force wheel, finished product fiber geometries size monitor 7, a back twist device 8 and a receipts silk system 9, between taking turns from fiber drawing furnace to drawing tensile force, optical fiber remains vertically, the surface that other system contacts with optical fiber does not change the path of optical fiber, promptly keep the good collimation of optical fiber, wherein to be included in the rectilinear motion under the effect of wire drawing tractive force and to introduce in the rubbing system under the torsional interaction be the rotation of axis with the wire-drawing direction in the motion of optical fiber, optical fiber is introduced in the rubbing system and is made optical fiber be forced to rotate around its axis under the torsional interaction, the direction that optical fiber rotates is taken turns the reciprocally swinging in being parallel to the optical fiber plane and is periodically changed direction with rubbing, and form distinctive mechanical wave, this mechanical wave can be propagated to its wire drawing updrift side along optical fiber, this mechanical wave can arrive the softened zone of prefabricated rods in fiber drawing furnace, make the softened zone vitreum produce plastic deformation, and be cured in the optical fiber of new drawing, carry out back twist by the back twist device again and obtain having the low polarisation mode dispersion single-mode fiber.The number of turns representative average that described optical fiber on average reverses is 2～60 circle/rice, and the optic fibre turning number of turns goes up the periodicity array configuration that distribution waveform can realize permanent width of cloth constant frequency and luffing frequency conversion component along its length, and the typical case reverses waveform and comprises three kinds of forms:
A, reverse waveform and in one-period, do not comprise the component of permanent amplitude and constant frequency rate and torsional component not;
B, reverse waveform and in one-period, comprise the component of permanent amplitude and constant frequency rate and torsional component not;
C, reverse waveform comprises permanent amplitude and constant frequency rate in one-period component, but do not comprise not torsional component.
The action that the rubbing wheel of described rubbing system forms comprises three kinds of forms: a pair of rubbing wheel is stabilized in vertical position simultaneously, a pair of rubbing wheel is stabilized in the inclination maximum position axisymmetrically, and the swing between vertical position and inclination maximum position axisymmetrically of a pair of rubbing wheel.Generally speaking, it is the performance that influences fiber products for fear of the mechanical wave propagation high dither that optical fiber produces because of the rubbing system that the rubbing wheel short time is stabilized in vertical position, it is in order to increase the number of turns of optical fiber horizontal torsion that the rubbing wheel short time rests on the inclination maximum position, and the reciprocally swinging of rubbing wheel between vertical position and inclination maximum position is to reverse waveform for the non-sinusoidal that makes optical fiber form frequency and amplitude disorder, increases the energy coupling that causes between the single-mode fiber polarization mode dispersion birefringence pairwise orthogonal component.
The full swing inclination angle representative value on described rubbing wheel plane, place is 5～20 degree.The described bar feeding mechanism that has rotary chuck has the prefabricated rods of making is advanced the function of rod and mated drawing speed while rotating the rod speed that advances, and spinfunction can be realized at the uniform velocity or be quickened to rotary chuck, also can realize unidirectional or two-way spinfunction.
The polarization mode dispersion coefficient of optical fiber of the present invention is not more than 0.03ps/km
1/2, it reverses waveform is periodically to repeat, comprising a fiber lengths that reverses waveform is 2～50 meters.
Claims (6)
1, a kind of suitable large preform rod in high speed manufacturing has the method for low polarisation mode dispersion single-mode fiber, it is that preform is fixed on the bar feeding mechanism that has rotary chuck on fiber drawing furnace top, and deliver in the drawing heating furnace and to carry out wire drawing while rotating, optical fiber after the process wire drawing is introduced in the rubbing system and is made optical fiber be forced to rotate around its axis under the torsional interaction, makes to have the low polarisation mode dispersion single-mode fiber.
2, a kind of suitable large preform rod in high speed manufacturing according to claim 1 has the method for low polarisation mode dispersion single-mode fiber, it is characterized in that: described method comprises that also the optical fiber that will prepare carries out back twist by the back twist device again and handles.
3, a kind of suitable large preform rod in high speed manufacturing according to claim 1 has the method for low polarisation mode dispersion single-mode fiber, it is characterized in that: the number of turns representative average that described optical fiber on average reverses is 2～60 circle/rice, the optic fibre turning number of turns goes up the periodicity array configuration that distribution waveform can realize permanent width of cloth constant frequency and luffing frequency conversion component along its length, and the typical case reverses waveform and comprises three kinds of forms:
A, reverse waveform and in one-period, do not comprise the component of permanent amplitude and constant frequency rate and torsional component not;
B, reverse waveform and in one-period, comprise the component of permanent amplitude and constant frequency rate and torsional component not;
C, reverse waveform comprises permanent amplitude and constant frequency rate in one-period component, but do not comprise not torsional component.
4, has the method for low polarisation mode dispersion single-mode fiber according to claim 1,2 or 3 described a kind of suitable large preform rod in high speed manufacturings, it is characterized in that: the action that the rubbing wheel of described rubbing system forms comprises three kinds of forms: a pair of rubbing wheel is stabilized in vertical position simultaneously, a pair of rubbing wheel is stabilized in the inclination maximum position axisymmetrically, and the swing between vertical position and inclination maximum position axisymmetrically of a pair of rubbing wheel.
5, described a kind of suitable large preform rod in high speed manufacturing has the method for low polarisation mode dispersion single-mode fiber according to claim 4, it is characterized in that: the full swing inclination angle representative value on described rubbing wheel plane, place is 5～20 degree.
6, a kind of suitable large preform rod in high speed manufacturing according to claim 4 has the method for low polarisation mode dispersion single-mode fiber, it is characterized in that: the described bar feeding mechanism that has rotary chuck has the prefabricated rods of making is advanced the function of rod and mated drawing speed while rotating the rod speed that advances, spinfunction can be realized at the uniform velocity or be quickened to rotary chuck, also can realize unidirectional or two-way spinfunction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101248584A CN1959450A (en) | 2006-10-26 | 2006-10-26 | Method suitable to large preform rod in high speed to produce single-mode optical fiber in low dispersion of polarization method |
| PCT/CN2007/070955 WO2008049375A1 (en) | 2006-10-26 | 2007-10-25 | A method for manufacturing a single mode optical fiber having low pmd |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101248584A CN1959450A (en) | 2006-10-26 | 2006-10-26 | Method suitable to large preform rod in high speed to produce single-mode optical fiber in low dispersion of polarization method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1959450A true CN1959450A (en) | 2007-05-09 |
Family
ID=38071235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101248584A Pending CN1959450A (en) | 2006-10-26 | 2006-10-26 | Method suitable to large preform rod in high speed to produce single-mode optical fiber in low dispersion of polarization method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1959450A (en) |
| WO (1) | WO2008049375A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008049375A1 (en) * | 2006-10-26 | 2008-05-02 | Yangtze Optical Fibre And Cable Company, Ltd. | A method for manufacturing a single mode optical fiber having low pmd |
| CN103113021A (en) * | 2013-01-11 | 2013-05-22 | 烽火通信科技股份有限公司 | Twisting-angle-adjustable optical fiber twisting apparatus and optical fiber twisting method |
| CN111003602A (en) * | 2019-12-12 | 2020-04-14 | 朱立怀 | Optical fiber untwisting device |
| CN111620560A (en) * | 2020-06-10 | 2020-09-04 | 长飞光纤光缆股份有限公司 | Drawn optical fiber twisting control device and method and multimode optical fiber |
| CN114315125A (en) * | 2021-11-25 | 2022-04-12 | 江苏法尔胜光电科技有限公司 | Preparation process of non-twist polarization maintaining optical fiber |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556675B (en) * | 2013-10-15 | 2017-11-21 | 南京华信藤仓光通信有限公司 | The manufacture method of single-mode fiber |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6324872B1 (en) * | 1996-04-12 | 2001-12-04 | Corning Incorporated | Method and apparatus for introducing controlled spin in optical fibers |
| JP2002226229A (en) * | 2000-11-29 | 2002-08-14 | Furukawa Electric Co Ltd:The | Device for adding continuous torsion to optical fiber |
| JP3911220B2 (en) * | 2002-08-28 | 2007-05-09 | 正隆 中沢 | Photonic crystal optical fiber and manufacturing method thereof |
| WO2004050573A1 (en) * | 2002-09-25 | 2004-06-17 | Giacomo Stefano Roba | Process for producing an optical fiber having a low polarization mode dispersion |
| CN1209308C (en) * | 2003-03-28 | 2005-07-06 | 长飞光纤光缆有限公司 | Manufacture of low polarization mode dispersion single mode optical fibers and products thereby |
| US20050188728A1 (en) * | 2004-03-01 | 2005-09-01 | Zhi Zhiou | Apparatus and method for manufacturing optical fiber including rotating optical fiber preforms during draw |
| EP1817263B1 (en) * | 2004-12-02 | 2014-04-09 | Prysmian S.p.A. | Method, system and device for imparting a predetermined rotation to an optical fibre |
| CN1959450A (en) * | 2006-10-26 | 2007-05-09 | 长飞光纤光缆有限公司 | Method suitable to large preform rod in high speed to produce single-mode optical fiber in low dispersion of polarization method |
-
2006
- 2006-10-26 CN CNA2006101248584A patent/CN1959450A/en active Pending
-
2007
- 2007-10-25 WO PCT/CN2007/070955 patent/WO2008049375A1/en active Application Filing
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008049375A1 (en) * | 2006-10-26 | 2008-05-02 | Yangtze Optical Fibre And Cable Company, Ltd. | A method for manufacturing a single mode optical fiber having low pmd |
| CN103113021A (en) * | 2013-01-11 | 2013-05-22 | 烽火通信科技股份有限公司 | Twisting-angle-adjustable optical fiber twisting apparatus and optical fiber twisting method |
| CN103113021B (en) * | 2013-01-11 | 2014-12-31 | 烽火通信科技股份有限公司 | Twisting-angle-adjustable optical fiber twisting apparatus and optical fiber twisting method |
| CN111003602A (en) * | 2019-12-12 | 2020-04-14 | 朱立怀 | Optical fiber untwisting device |
| CN111003602B (en) * | 2019-12-12 | 2021-08-06 | 郑炜铃 | Optical fiber untwisting device |
| CN111620560A (en) * | 2020-06-10 | 2020-09-04 | 长飞光纤光缆股份有限公司 | Drawn optical fiber twisting control device and method and multimode optical fiber |
| CN111620560B (en) * | 2020-06-10 | 2021-11-09 | 长飞光纤光缆股份有限公司 | Drawn optical fiber twisting control device and method and multimode optical fiber |
| CN114315125A (en) * | 2021-11-25 | 2022-04-12 | 江苏法尔胜光电科技有限公司 | Preparation process of non-twist polarization maintaining optical fiber |
| WO2023093239A1 (en) * | 2021-11-25 | 2023-06-01 | 江苏法尔胜光电科技有限公司 | Preparation process of twist-free polarization-maintaining optical fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008049375A1 (en) | 2008-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1261777C (en) | Multimode optical fibre with enlarged band width | |
| EP0582405B1 (en) | Method of drawing an optical fibre and fibre produced thereby | |
| CN100434378C (en) | Optical fiber having a low polarization mode dispersion and process and apparatus for producing it | |
| CN1959450A (en) | Method suitable to large preform rod in high speed to produce single-mode optical fiber in low dispersion of polarization method | |
| CN1209308C (en) | Manufacture of low polarization mode dispersion single mode optical fibers and products thereby | |
| CN105621157B (en) | A kind of optical fiber back-twist device | |
| CN1477799A (en) | System for forming ultralow PMD optical fibre by utilizing amplitude modulation and frequency modulation rotation function | |
| US6876804B2 (en) | Method of making a spun optical fiber with low polarization mode dispersion | |
| AU715043B2 (en) | Polarization mode coupled single mode waveguide | |
| WO2002003115A1 (en) | Optical fibre with reduced polarization mode dispersion and method for obtaining an optical fibre with reduced polarization mode dispersion | |
| CN103113021B (en) | Twisting-angle-adjustable optical fiber twisting apparatus and optical fiber twisting method | |
| CN100595170C (en) | Process for producing a low polarization mode dispersion optical fiber | |
| KR20060132664A (en) | Low polarisation mode dispersion (pmd) optical fiber link, and method of making the same | |
| US7861556B2 (en) | Method and apparatus for impulsively spinning optical fiber | |
| CN1238750C (en) | Variable birefringence cell and dispersion compensator in polarization mode | |
| CN1572743A (en) | Apparatus and method for fabricating optical fiber by spinning | |
| EP1439150B1 (en) | Method for producing twisted optical fiber with reduced polarization mode dispersion | |
| US20050069267A1 (en) | Method of making spun optical fiber with low PMD | |
| CN1572742A (en) | Anti-PMD system | |
| CN217323881U (en) | Special optical fiber drawing device | |
| JP2004277217A (en) | Method of manufacturing optical fiber and optical fiber | |
| WO2005100274A1 (en) | Process for producing optical fiber and optical fiber | |
| US20040045324A1 (en) | Anti-PMD system | |
| Shen et al. | Application of single-mode fiber with low polarization mode-dispersion (PMD) in 40-Gb/s high-speed communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |