CN109437548A - Spiral high birefringence structure protects elliptical polarization optical fiber manufacturing process - Google Patents
Spiral high birefringence structure protects elliptical polarization optical fiber manufacturing process Download PDFInfo
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- CN109437548A CN109437548A CN201910000583.0A CN201910000583A CN109437548A CN 109437548 A CN109437548 A CN 109437548A CN 201910000583 A CN201910000583 A CN 201910000583A CN 109437548 A CN109437548 A CN 109437548A
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- China
- Prior art keywords
- optical fiber
- wire tray
- elliptical polarization
- polarization optical
- high birefringence
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- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/30—Polarisation maintaining [PM], i.e. birefringent products, e.g. with elliptical core, by use of stress rods, "PANDA" type fibres
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention discloses a kind of spiral high birefringence structures to protect elliptical polarization optical fiber manufacturing process, wherein preform is in non-rotating state or rotation status in drawing process, wire tray will be received while wire drawing to overturn, to make the optical fiber drawn generate torsion, and this torsion is transferred to high-temperature heating area, optical fiber is set to form intrinsic spiral high birefringence structure in the region, solve the problems, such as that wire drawing is unstable in traditional handicraft in this way, it ensure that the long range stabilization and the real industrialization of fiber manufacturing of optic fibre characteristic.
Description
Technical field
The present invention is related with optic fibre manufacture process, particularly belongs to a kind of spiral high birefringence structure guarantor elliptical polarization optical fiber system
Make technique.
Background technique
Spiral high birefringence structure, which protects elliptical polarization optical fiber (referred to as protecting elliptical polarization optical fiber), is imitated based on optics faraday
The core material for the fibre optic current sensor answered, the cross-sectional structure of this optical fiber and our usually said guarantor's linear polarization optical fiber
Cross-sectional structure it is similar, such as panda type, bow-tie type, oval cladding type, oval core, "-" type.
Structurally, the maximum differential protecting elliptical polarization optical fiber and protecting between linear polarization optical fiber is: protecting linearly polarized light
Linear birefringence orientation in fibre with transmission range (or optical fiber axial direction) be it is constant or very slowly varying, it is this slowly
Variation be not deliberately to be made into such as caused by drawing optical fibers technique, usually can be ignored；And protect elliptical polarization
Linear birefringence orientation in optical fiber with transmission range (or optical fiber axial direction) be it is fast-changing, what is referred to is exactly helical structure, is led to
The period (referred to as screw pitch) of normal this variation is less than 6mm.
It is as shown in Figure 1 the drawing process for protecting linear polarization optical fiber, the lower end of preform 1 utilizes high-temperature heating area 2 (such as
Pyrographite furnace) heating, the satisfactory bare fibre of diameter is made through wire drawing, the surface of the bare fibre is in optical fiber coating area 3
It is coated with one layer of coating material, is finally wound on and is received in wire tray 5 under the guidance of optic fibre guide wheel 4.From drawing process,
Production is protected in the drawing process of linear polarization optical fiber, and preform 1 does not need rotation, usually only needs to control to receive wire tray 5
Revolving speed can control drawing speed, general drawing speed is few meters per second (for example, 10 meters or so).
It is illustrated in figure 2 the traditional wiredrawing process for protecting elliptical polarization optical fiber, with the wire drawing shown in FIG. 1 for protecting linear polarization optical fiber
Unlike technique, in the drawing process that elliptical polarization optical fiber is protected in production, the needs of preform 1 are stably rotated, and receive silk
The revolving speed of disk 5 is determined by the revolving speed and set screw pitch of preform 1.If the rotation 5 per second of preform 1
Week, the screw pitch of spiral birefringent structure are 6mm, and only about 30mm, deficiency draw guarantor to drawn this fiber lengths per second
The 31 percent of linear polarization optical fibre velocity.However, most fatal problem be draw optical fiber parameter it is highly unstable, Er Qielian
The continuous length drawn is very limited, and usually only several hundred rice will be pulled off, this is because one end of preform 1 is heated
To more than 2000 degree, while high speed rotation is also needed, such prefabricated rods fire end is easy for generating eccentric phenomena, so that wire drawing can not
Continue.And when drawing guarantor's linear polarization optical fiber, preform 1 does not need to rotate, and the length of continuous wire drawing generally depends on light
The size of fine prefabricated rods 1, drawing dozens or even hundreds of kilometer, just there is no problem at all.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of spiral high birefringence structures to protect the manufacture of elliptical polarization optical fiber
Technique can solve and protect the wire drawing of elliptical polarization optical fiber unstable problem and continuous drawing length limited in the prior art
Problem.
In order to solve the above technical problems, spiral high birefringence structure provided by the invention, which protects elliptical polarization optical fiber, manufactures work
Skill, in drawing process, preform is in non-rotating state, receives while wire tray is rotated around its shaft and overturns, makes optical fiber
Torsion is generated, and is transferred to high-temperature heating area and forms intrinsic spiral high birefringence structure, wherein receiving the overturning central axis of wire tray
It is vertical with the rotating shaft of its own.
Alternatively, the preform is changed to rotation status, and the direction of rotation of preform and receipts wire tray overturning produce
Raw optic fibre turning is contrary.
Further, to the optical fiber progress after-combustion received in wire tray is wound on after drawing, during after-combustion, it is passive for receiving wire tray
, rewind disc be active, receive wire tray and rewind disc and all rotated around respective shaft, and receive wire tray or rewind disc rotates around the shaft
While overturn, the central axis of overturning is vertical with the shaft that itself is rotated.
Or it is further, after-combustion is carried out to the optical fiber received in wire tray is wound on after drawing, during after-combustion, receiving wire tray is
Passively, rewind disc is active, and receipts wire tray and rewind disc are overturn while rotation around each axis of rotation, receives the rotating shaft of wire tray
Parallel with the rotating shaft of rewind disc, the overturning central axis of the two is vertical with the rotating shaft of its own, and receives wire tray and answer
The reverses direction of drum is opposite.
Guarantor's elliptical polarization optical fiber manufacturing process provided by the invention solves the problems, such as that wire drawing is unstable in traditional handicraft,
So that the optical fiber drawn is generated torsion by way of it will receive wire tray in drawing process and overturn, and this torsion is transferred to
It is heated at high temperature area, so that optical fiber is formed intrinsic spiral high birefringence structure in the region, ensure that the long range of optic fibre characteristic is steady
Fixed and fiber manufacturing real industrialization.
Detailed description of the invention
Fig. 1 is the drawing process schematic diagram for protecting linear polarization optical fiber；
Fig. 2 is the traditional wiredrawing process schematic diagram for protecting elliptical polarization optical fiber；
Fig. 3 is the first drawing process schematic diagram of guarantor's elliptical polarization optical fiber of the invention；
Fig. 4 is second of drawing process schematic diagram of guarantor's elliptical polarization optical fiber of the invention.
Wherein the reference numerals are as follows:
1 is preform；2 be high-temperature heating area；3 be optical fiber coating area；4 be optic fibre guide wheel；5 be receipts wire tray.
Specific embodiment
Present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
First embodiment
Spiral high birefringence structure provided in this embodiment protects elliptical polarization optical fiber manufacturing process, as shown in figure 3, predispersed fiber
The lower end of stick 1 processed is heated in high-temperature heating area 2, the satisfactory bare fibre of diameter is made through wire drawing, the surface of the bare fibre exists
It is coated with a floor coating material in optical fiber coating area 3, is then guided through optic fibre guide wheel 4, is finally wound on and receives in wire tray 5.
In above-mentioned drawing process, as shown in figure 3, preform 1 does not rotate, and received during wire drawing
Wire tray 5 not only also will do it high-speed turnover around the rotation of its shaft, receive central axis and receive what wire tray 5 rotated that wire tray 5 is overturn
Shaft is mutually perpendicular to, so that the optical fiber of drawing generates torsion, and this torsion can overcome optic fibre guide wheel 4 easily
Frictional force (optic fibre guide wheel 4 can have in system for drawing multiple, the present embodiment is illustrated for three), and be transmitted to
The region that preform 1 is heated, in that region, torsion is continuously released by, and forms spiral high birefringence to draw
The optical fiber of structure, i.e. guarantor's elliptical polarization optical fiber.The speed for receiving the overturning of wire tray 5 is faster, and the speed of torsion transmitting is also faster, solid
In the case where fixed receipts silk speed, the speed for receiving the overturning of wire tray 5 is faster, protects the birefringent screw pitch of elliptical polarization optical fiber with regard to smaller.
Since the present embodiment is to receive the production of wire tray 5 by overturning to protect elliptical polarization optical fiber, preform 1 is not
It needs to rotate, the entire drawing process of guarantor's elliptical polarization optical fiber may be implemented non-like linear polarization optical fiber is protected in production in this way
Often stable long-time and long range wire drawing.
Under guarantor's elliptical polarization optical fiber screw pitch of setting, the reversal rate for receiving wire tray 5 determines drawing speed.Receive wire tray 5
Overturning realized by heavy-duty motor driving, usual reversal rate up to 50 circles/second, remaining torsion in removal optical fiber (i.e. without
Method is discharged by high-temperature region optical fiber), effective overturning circle number of generation per second is still in 45 circle left and right, the drawing speed being achieved in that
Probably at 270mm/ seconds, compared with the high-speed rotating traditional wiredrawing process of preform, the drawing speed of the present embodiment is improved
Nearly 10 times, most critical is exactly that can ensure that the long range of optic fibre characteristic is stablized.According to theoretic analysis, this optical fiber is available
In replace traditional fiber gyro ring in line polarization maintaining optical fibre, it is this kind of protect elliptical polarization optical fiber screw pitch be it is bigger, probably
In 20mm or so, such drawing speed is close to 1000mm/ seconds, and 2 kilometers of continuous drawing of guarantor's elliptical polarization optical fiber probably needs
Or so half an hour, one 50 kilometers of preform can pull in 24 hours.
Further, the remaining torsion in guarantor's elliptical polarization optical fiber drawn can also be by way of optical fiber after-combustion
(i.e. back twist) completely eliminates, and only in this way, is just able to achieve real industrialization.Concrete mode there are several types of:
(1) during after-combustion, receive wire tray rotation speed control by after-combustion disc spin speed (receive wire tray be passively,
Rewind disc is active), it receives wire tray and rewind disc and is all rotated around respective shaft, and receive while wire tray rotates around the shaft and turn over
Turn, the central axis for receiving wire tray overturning is vertical with the shaft that itself is rotated；
(2) during after-combustion, receive wire tray rotation speed control by after-combustion disc spin speed (receive wire tray be passively,
Rewind disc is active), it receives wire tray and rewind disc and is all rotated around respective shaft, and rewind disc rotates around the shaft while is turned over
Turn, the central axis of rewind disc overturning is vertical with the shaft that itself is rotated；
(3) during after-combustion, receive wire tray rotation speed control by after-combustion disc spin speed (receive wire tray be passively,
Rewind disc is active), receipts wire tray and rewind disc are overturn while rotation around each axis of rotation, receive rotating shaft and the after-combustion of wire tray
The rotating shaft of disk is parallel, and the overturning central axis of the two is vertical with the rotating shaft of its own (to receive the overturning center of wire tray
Axis is vertical with the rotating shaft of its own, and the overturning central axis of rewind disc is vertical with the rotating shaft of its own, the overturning of the two
Central axis is on the same axis), and the reverses direction for receiving wire tray and rewind disc is opposite.
Second embodiment
Spiral high birefringence structure provided in this embodiment protects elliptical polarization optical fiber manufacturing process, as shown in figure 4, with first
Unlike embodiment, preform 1 is changed to rotation status, and 1 lower end of preform is heated in high-temperature heating area 2, through drawing
The satisfactory bare fibre of diameter is made in silk, and the surface of the bare fibre is coated with a floor coating material in optical fiber coating area 3,
Then it is guided through optic fibre guide wheel 4, is finally wound on and receives in wire tray 5.The receipts wire tray 5 carries out high speed while rotation around its shaft
Ground overturning is received the central axis that wire tray 5 is overturn and is mutually perpendicular to the shaft that wire tray 5 rotates is received, and the rotation of preform 1
Direction is contrary with the optic fibre turning that the overturning of wire tray 5 generates is received, and can make the torsion of optical fiber that can accumulate superposition in this way.
After drawing protect elliptical polarization optical fiber in remaining torsion can also by way of optical fiber after-combustion (i.e. back twist) it is complete
Totally disappeared and remove, concrete mode there are several types of:
(1) during after-combustion, receive wire tray rotation speed control by after-combustion disc spin speed (receive wire tray be passively,
Rewind disc is active), it receives wire tray and rewind disc and is all rotated around respective shaft, and receive while wire tray rotates around the shaft and turn over
Turn, the central axis for receiving wire tray overturning is vertical with the shaft that itself is rotated；
(2) during after-combustion, receive wire tray rotation speed control by after-combustion disc spin speed (receive wire tray be passively,
Rewind disc is active), it receives wire tray and rewind disc and is all rotated around respective shaft, and rewind disc rotates around the shaft while is turned over
Turn, the central axis of rewind disc overturning is vertical with the shaft that itself is rotated；
(3) during after-combustion, receive wire tray rotation speed control by after-combustion disc spin speed (receive wire tray be passively,
Rewind disc is active), receipts wire tray and rewind disc are overturn while rotation around each axis of rotation, receive rotating shaft and the after-combustion of wire tray
The rotating shaft of disk is parallel, and the overturning central axis of the two is vertical with the rotating shaft of its own (to receive the overturning center of wire tray
Axis is vertical with the rotating shaft of its own, and the overturning central axis of rewind disc is vertical with the rotating shaft of its own, the overturning of the two
Central axis is on the same axis), and the reverses direction for receiving wire tray and rewind disc is opposite.
The present invention has been described in detail through specific embodiments, which is only of the invention preferable
Embodiment not limits the invention.Without departing from the principles of the present invention, those skilled in the art makes
Equivalent replacement and improvement, be regarded as in the technology scope protected of the present invention.
Claims (4)
1. a kind of spiral high birefringence structure protects elliptical polarization optical fiber manufacturing process, which is characterized in that preform is in non-
Rotation status is received while wire tray is rotated around its shaft and is overturn, optical fiber is made to generate torsion, and is transferred to high-temperature heating area's optical fiber shape
At intrinsic spiral high birefringence structure, wherein the overturning central axis for receiving wire tray is vertical with the rotating shaft of its own.
2. spiral high birefringence structure according to claim 1 protects elliptical polarization optical fiber manufacturing process, which is characterized in that institute
It states preform and is changed to rotation status, and the direction of rotation of preform and the optic fibre turning direction for receiving wire tray overturning generation
On the contrary.
3. spiral high birefringence structure according to claim 1 or 2 protects elliptical polarization optical fiber manufacturing process, feature exists
In, to be wound on after drawing receive wire tray on optical fiber carry out after-combustion, during after-combustion, receive wire tray be passively, rewind disc be main
It is dynamic, it receives wire tray and rewind disc rotate around respective shaft, and receive wire tray or overturning while rewind disc rotates around the shaft, overturn
Central axis it is vertical with the shaft that itself is rotated.
4. spiral high birefringence structure according to claim 1 or 2 protects elliptical polarization optical fiber manufacturing process, feature exists
In, to be wound on after drawing receive wire tray on optical fiber carry out after-combustion, during after-combustion, receive wire tray be passively, rewind disc be main
Dynamic, receipts wire tray and rewind disc are overturn while rotation around each axis of rotation, and the rotation for receiving the rotating shaft and rewind disc of wire tray turns
Axis is parallel, and the overturning central axis of the two is vertical with the rotating shaft of its own, and receives the reverses direction phase of wire tray and rewind disc
Instead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000583.0A CN109437548A (en) | 2019-01-02 | 2019-01-02 | Spiral high birefringence structure protects elliptical polarization optical fiber manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000583.0A CN109437548A (en) | 2019-01-02 | 2019-01-02 | Spiral high birefringence structure protects elliptical polarization optical fiber manufacturing process |
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| CN201910000583.0A Pending CN109437548A (en) | 2019-01-02 | 2019-01-02 | Spiral high birefringence structure protects elliptical polarization optical fiber manufacturing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147739A (en) * | 2019-06-26 | 2020-12-29 | 上海康阔光智能技术有限公司 | Bending-resistant and torsion-resistant optical fiber for optical fiber gyroscope, and sensing optical fiber ring and optical fiber gyroscope using same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503116B (en) * | 2011-10-14 | 2014-04-23 | 武汉长盈通光电技术有限公司 | Method for manufacturing rotary optical fiber and rotary fiber winding device |
| CN107564625A (en) * | 2017-08-16 | 2018-01-09 | 广东思柏科技股份有限公司 | One kind spin unwrapping wire back twist method |
-
2019
- 2019-01-02 CN CN201910000583.0A patent/CN109437548A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503116B (en) * | 2011-10-14 | 2014-04-23 | 武汉长盈通光电技术有限公司 | Method for manufacturing rotary optical fiber and rotary fiber winding device |
| CN107564625A (en) * | 2017-08-16 | 2018-01-09 | 广东思柏科技股份有限公司 | One kind spin unwrapping wire back twist method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147739A (en) * | 2019-06-26 | 2020-12-29 | 上海康阔光智能技术有限公司 | Bending-resistant and torsion-resistant optical fiber for optical fiber gyroscope, and sensing optical fiber ring and optical fiber gyroscope using same |
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Application publication date: 20190308 |
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