CN110104945A - For manufacturing the preform of oval core polarization maintaining optical fibre and the manufacturing process of oval core polarization maintaining optical fibre - Google Patents
For manufacturing the preform of oval core polarization maintaining optical fibre and the manufacturing process of oval core polarization maintaining optical fibre Download PDFInfo
- Publication number
- CN110104945A CN110104945A CN201910443477.XA CN201910443477A CN110104945A CN 110104945 A CN110104945 A CN 110104945A CN 201910443477 A CN201910443477 A CN 201910443477A CN 110104945 A CN110104945 A CN 110104945A
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- Prior art keywords
- plug
- polarization maintaining
- optical fibre
- maintaining optical
- preform
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Classifications
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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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
-
- 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
- C03B37/02709—Polarisation maintaining fibres, e.g. PM, PANDA, bi-refringent optical fibres
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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)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention discloses a kind of for manufacturing the preform of oval core polarization maintaining optical fibre, include a quartz socket tube, n root plug and the pure quartz pushrod of N root, the center line of all plugs in the same plane, the pure quartz pushrod of the symmetrical identical quantity in plug two sides, the interior diameter d of quartz socket tube0, plug overall diameter d1And the overall diameter d of pure quartz pushrod2Between relational expression beThe quantity n of the quantity N of pure quartz pushrod and plug, the pure quartz pushrod of plug side distribution columns C between relational expression be n=2C+1,Wherein n is the odd number greater than 1.The present invention also provides the manufacturing process of oval core polarization maintaining optical fibre, carry out high-temperature fusion to above-mentioned preform, and plug melts to form oval core, and pure quartz pushrod and quartz socket tube fuse to form elliptical core fiber covering, and birefringent oval core polarization maintaining optical fibre is made in wire drawing.The fibre core of preform is formed during the high-temperature fusion of short time in the present invention, and avoiding long-time high-temperature fusion prefabricated rods makes fibre core generate thermal diffusion and effective linear birefringence is caused to be greatly reduced.
Description
Technical field
The present invention is related with optical fiber technology, particularly belong to a kind of preform for manufacturing oval core polarization maintaining optical fibre and
The manufacturing process of oval core polarization maintaining optical fibre, to solve, the oval core polarization maintaining optical fibre done using traditional handicraft is birefringent low and consistency
The problem of difference.
Background technique
There are many type of polarization maintaining optical fibre, typically have panda type polarization-preserving fiber, bow-tie type polarization maintaining optical fibre, oval cladding type to protect
Fine, the oval core polarization maintaining optical fibre of polarisation, photonic crystal polarization maintaining optical fibre etc..Currently, most widely used at home and technology is most mature
Polarization maintaining optical fibre is exactly panda type polarization-preserving fiber.The production technology of this polarization maintaining optical fibre is more stable, and basic performance is consistent.
But the optical fiber of different structure has different advantage and disadvantage, these aforementioned polarization maintaining optical fibres can generally speaking be divided into
Two major classes, one is stress type polarization maintaining optical fibre, mentioned-above panda type polarization-preserving fiber, bow-tie type polarization maintaining optical fibre, oval covering
Type polarization maintaining optical fibre just belongs to stress type polarization maintaining optical fibre；Another kind is non-stress type optical fiber, mentioned-above ellipse core polarization maintaining optical fibre,
Photonic crystal polarization maintaining optical fibre just belongs to non-stressed type polarization maintaining optical fibre.
Influence of the different application scenarios to optical fiber property be also it is different, only from fibre optic current sensor and optical fiber
The application angle of gyro is analyzed, and overall development trend is substantially: (1) from high-stress area type optical fiber to small stress zone type optical fiber
Development；(2) it since non-stressed type optical fiber has better temperature stability, therefore is sent out from stress type optical fiber to non-stressed type optical fiber
Exhibition.
In view of above-mentioned optical fiber developing direction, photonic crystal polarization maintaining optical fibre is suitable for the characteristic of material itself
, but due to the particularity of its structure, therefore it is many in transmission loss, coupling loss, welding point reliability and cost etc. at present
The advantage that aspect is not shown compared with stress type polarization maintaining optical fibre.Due to these problems, photonic crystal polarization maintaining optical fibre does not have also so far
It is widely used.
For oval core polarization maintaining optical fibre, on the surface, it is to realize polarization property because geometry is birefringent, but real
Its existing geometry is birefringent in matter, and there are also stress birfringences, and the material of oval core and fibre cladding material are different after all.
The greatest problem of ellipse core polarization maintaining optical fibre is exactly that its linear birefringence compares lower (clapping longer) at present, is only used for low
Precision optical fiber gyro, such as the KVH company in the U.S. is exactly the optical fibre gyro for carrying out low precision in mass production using this optical fiber.It is ellipse
The linear birefringence of round core polarization maintaining optical fibre is low mainly to be determined by its production technology, usual production procedure as shown in Figure 1,
It is specific as follows:
1) the round prefabricated rods for preparing suitable parameters, as shown in Fig. 1 (A)；
2) round prefabricated rods are laterally ground and is polished, keep its shape similar oval, as shown in Fig. 1 (B)；
3) high-temperature fusion is carried out to the prefabricated rods that grinding and polishing is crossed, keeps its shape rounded, and original circular core becomes
Ovalisation, as shown in Fig. 1 (C)；
4) wire drawing forms oval core polarization maintaining optical fibre.
In above-mentioned technique the 3) in step, since preform is in high temperature fused state for a long time, fibre core generates heat
Diffusion effect is greatly reduced so as to cause effective linear birefringence effect, this is a urgent problem to be solved.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of for manufacturing the preform of oval core polarization maintaining optical fibre
And the manufacturing process of oval core polarization maintaining optical fibre, it can solve in existing oval core polarization maintaining optical fibre production process because preform is long
Time is in high temperature fused state and so that fibre core is led to the problem of thermal diffusion effect leads to that linear birefringence is low and consistency is poor.
In order to solve the above technical problems, provided by the present invention for the preform for manufacturing oval core polarization maintaining optical fibre, packet
Containing a quartz socket tube, n root plug and the pure quartz pushrod of N root, the center line of all plugs in the same plane, and the plug
The pure quartz pushrod of the symmetrical identical quantity in two sides, the interior diameter d of the quartz socket tube0, the plug overall diameter d1And institute
State the overall diameter d of pure quartz pushrod2Between relational expression be d1=d2=d0/ n, quantity N and the plug of the pure quartz pushrod
Quantity n, the relational expression between the distribution columns C of the pure quartz pushrod of the plug side are n=2C+1,Wherein n is the odd number greater than 1.
Preferably, the quantity of plug is 3 in the preform.Alternatively, in the preform plug number
Amount is 5.
Preferably, the plug is the quartz pushrod for mixing germanium.
Meanwhile the present invention also provides the manufacturing process of oval core polarization maintaining optical fibre, specifically includes the following steps:
Step 1, prepare circular preform, the preform includes a quartz socket tube, n root plug and N
The pure quartz pushrod of root, in the same plane, and the symmetrical identical quantity in two sides of the plug is pure for the center line of all plugs
Quartz pushrod, the interior diameter d of the quartz socket tube0, the plug overall diameter d1And the overall diameter d of the pure quartz pushrod2Between
Relational expression be d1=d2=d0The quantity n of/n, the quantity N of the pure quartz pushrod and the plug, positioned at the plug side
Relational expression between the distribution columns C of the pure quartz pushrod is n=2C+1,Wherein n is greater than 1
Odd number；
Step 2, high-temperature fusion is carried out to the preform, the n root plug melts to form oval core or strip
Core, the pure quartz pushrod of N root and quartz socket tube fuse together to form elliptical core fiber covering；
Step 3, high double-refraction elliptical core polarization maintaining optical fibre is made in wire drawing.
Further, the quantity positioned at the pure quartz pushrod of plug side c column is n-c, wherein 1≤c≤C.
Preferably, the quantity of plug is 3 in the preform.Alternatively, in the preform plug number
Amount is 5.
Preferably, the plug is the quartz pushrod for mixing germanium.
Compared with the existing technology for generating birefringent oval core polarization maintaining optical fibre using round prefabricated rods, of the invention is prefabricated
Stick uses cannula structure, and regularly arranges in casing two kinds of quartz pushrods (pure quartz pushrod and the quartz pushrod for mixing germanium), this
During preform high-temperature fusion contracting stick, the quartz pushrod for mixing germanium is fused together to form oval core sample, remaining pure stone
English stick and casing fuse together to form elliptical core fiber covering, since fibre core is the high temperature in preform in the short period
It is formed in melting process, therefore avoiding fibre core generation thermal diffusion effect causes effective linear birefringence effect to be greatly reduced
Problem.There is good process repeatability and linear birefringence using the method that oval core polarization maintaining optical fibre is made in preform of the invention
The high advantage of effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in the existing production process of oval core polarization maintaining optical fibre；
Fig. 2 is the structural schematic diagram of the embodiment one of preform in the present invention, and wherein preform includes three
Plug；
Fig. 3 is the part schematic diagram of fabrication technology of the oval core polarization maintaining optical fibre of the embodiment of the present invention one, wherein predispersed fiber
Stick processed includes three plugs；
Fig. 4 is the structural schematic diagram of the embodiment two of preform in the present invention, and wherein preform includes five
Plug；
Fig. 5 is the part schematic diagram of fabrication technology of the oval core polarization maintaining optical fibre of the embodiment of the present invention two, wherein predispersed fiber
Stick processed includes five plugs.
Wherein the reference numerals are as follows:
1 is quartz socket tube；2 be plug；3 be pure quartz pushrod.
Specific embodiment
Currently, the oval core polarization maintaining optical fibre in non-stressed type optical fiber is widely applied in middle low-precision optical fiber gyro, and it
Greatest problem to be that linear birefringence compares lower, this is because the optical fiber needs to make ground polishing in production technology
The elliptical preform of shape carries out prolonged high-temperature fusion, this makes fibre core generate thermal diffusion effect and cause to have
The linear birefringence of effect reduces.
In view of the above problems, the present invention is used to manufacture the preform of oval core polarization maintaining optical fibre, includes a quartz sleeve
Pipe, n root plug and the pure quartz pushrod of N root, in the same plane, and the two sides of the plug are symmetrical for the center line of all plugs
The pure quartz pushrod of identical quantity, the interior diameter d of the quartz socket tube0, the plug overall diameter d1And the pure quartz pushrod
Overall diameter d2Between relational expression be d1=d2=d0The quantity n of/n, the quantity N of the pure quartz pushrod and the plug, it is located at institute
Stating the relational expression between the distribution columns C of the pure quartz pushrod of plug side is n=2C+1,Its
Middle n is the odd number greater than 1.
In above-mentioned preform, the plug can choose the quartz pushrod for mixing germanium, but be not limited to that mixing germanium, only
If the structure type for adding inner quartz stick to arrange using above-mentioned quartz socket tube.
Wherein, the quantity positioned at the pure quartz pushrod of plug side c column is n-c, wherein 1≤c≤C.That is,
Secondary series positioned at the quantity of the pure quartz pushrod of the first row of plug two sides one fewer than the quantity of plug, positioned at plug two sides
It the quantity of pure quartz pushrod two fewer than the quantity of plug, is arranged and is pushed away with this.
The manufacturing process of oval core polarization maintaining optical fibre is processed using above-mentioned preform, specifically includes the following steps:
Step 1, prepare above-mentioned circular preform；
Step 2, high-temperature fusion is carried out to the preform, the n root plug melts to form oval core or strip
Core, the pure quartz pushrod of N root and quartz socket tube fuse together to form elliptical core fiber covering；
Step 3, high double-refraction elliptical core polarization maintaining optical fibre is made in wire drawing.
Embodiments of the present invention are illustrated by particular specific embodiment with reference to the accompanying drawing, those skilled in the art can
To understand further advantage and effect of the invention easily by content disclosed in the present specification.Elaborate have in the following description
Body details is to facilitate a thorough understanding of the present invention, still the present invention also can be implemented or be answered by other different specific embodiments
With details in this specification can also be based on different perspectives and applications, and those skilled in the art are without departing substantially from of the invention
Various similar popularizations and replacement can be carried out under spirit.
First embodiment
In the present embodiment, preform include 1, three plug 2 (quartz pushrod for mixing germanium) of a quartz socket tube and
Four pure quartz pushrods 3, three plugs 2 form a line, i.e., the center line of plug 2 in the same plane, symmetrically divide by the two sides of plug 2
Cloth two pure quartz pushrods 3, as shown in Fig. 2, wherein the interior diameter of quartz socket tube 1 is d0, the overall diameter d of plug 21With pure quartz pushrod 3
Overall diameter d2It is d0/3.The overall diameter of the overall diameter of quartz socket tube 1 is D, and the relationship of overall diameter and interior diameter depends on adding
The optic fibre characteristic of work, it usually needs the polarization maintaining optical fibre for ensuring to be finally made is single mode transport in fast axle and slow axis, wherein to ellipse
For round core optical fiber, slow axis is the long axis of core, and fast axle is the short axle of core.
After high-temperature fusion contracting stick, three plugs 2 are fused together to be formed oval core (or strip core), and four pure stones
English stick 3 and quartz socket tube 1 fuse together to form elliptical core fiber covering, as shown in figure 3, forming elliptical core fiber prefabricated rods.
After forming elliptical core fiber prefabricated rods, wire drawing can be carried out according to routine techniques, high double-refraction elliptical core guarantor is made
Polarisation is fine.
Second embodiment
In order to further increase the birefringence of oval core polarization maintaining optical fibre, the preform of the present embodiment includes a stone
1, five plug 2 (quartz pushrod for mixing germanium) of English casing and 14 pure quartz pushrods 3, five plugs 2 form a line, plug 2
The symmetrical pure quartz pushrod 3 of seven roots in two sides, as shown in figure 4, being located at the quantity of the pure quartz pushrod 3 of the first row of 2 two sides of plug
It is four, the quantity positioned at the pure quartz pushrod 3 of the secondary series of 2 two sides of plug is three, and wherein the interior diameter of quartz socket tube 1 is
d0, the overall diameter d of plug 21With the overall diameter d of pure quartz pushrod 32It is d0/5。。
After high-temperature fusion contracting stick, five plugs 2 are fused together to form oval core (or strip core), and 14 pure
Quartz pushrod 3 and quartz socket tube 1 fuse together to form elliptical core fiber covering, as shown in Figure 5.
After forming elliptical core fiber prefabricated rods, wire drawing can be carried out according to routine techniques, high double-refraction elliptical core guarantor is made
Polarisation is fine.
Prefabricated rods of the invention use cannula structure, and two kinds of quartz pushrod (pure quartz of regularly arranging in casing
Stick and the quartz pushrod for mixing germanium), in this way during preform high-temperature fusion contracting stick, the quartz pushrod for mixing germanium is fused together
Oval core is formed, remaining pure quartz pushrod and casing fuse together to form elliptical core fiber covering, since fibre core is to optical fiber
It is formed during the high-temperature fusion of prefabricated rods progress short period, therefore avoid fibre core generation thermal diffusion effect to cause effectively
Linear birefringence effect the problem of being greatly reduced, the oval core polarization maintaining optical fibre of high birefringence rate can be obtained.
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 (6)
1. a kind of for manufacturing the preform of oval core polarization maintaining optical fibre, which is characterized in that include a quartz socket tube, n root
Plug and the pure quartz pushrod of N root, the center line of all plugs in the same plane, and the symmetrical identical number in two sides of the plug
The pure quartz pushrod of amount, the interior diameter d of the quartz socket tube0, the plug overall diameter d1And the overall diameter of the pure quartz pushrod
d2Between relational expression be d1=d2=d0The quantity n of/n, the quantity N of the pure quartz pushrod and the plug, it is located at the plug
Relational expression between the distribution columns C of the pure quartz pushrod of side is n=2C+1,Wherein n is
Odd number greater than 1.
2. according to claim 1 for manufacturing the preform of oval core polarization maintaining optical fibre, which is characterized in that the light
The quantity of plug is 3 in fine prefabricated rods.
3. according to claim 1 for manufacturing the preform of oval core polarization maintaining optical fibre, which is characterized in that the light
The quantity of plug is 5 in fine prefabricated rods.
4. a kind of manufacturing process of ellipse core polarization maintaining optical fibre, which is characterized in that specifically includes the following steps:
Step 1, prepare circular preform, the preform includes that a quartz socket tube, n root plug and N root are pure
Quartz pushrod, the center line of all plugs in the same plane, and the pure quartz of the symmetrical identical quantity in two sides of the plug
Stick, the interior diameter d of the quartz socket tube0, the plug overall diameter d1And the overall diameter d of the pure quartz pushrod2Between pass
Be formula be d1=d2=d0The quantity n of/n, the quantity N of the pure quartz pushrod and the plug, positioned at described in the plug side
Relational expression between the distribution columns C of pure quartz pushrod is n=2C+1,Wherein n is the surprise greater than 1
Number；
Step 2, high-temperature fusion is carried out to the preform, the n root plug melts to form oval core or strip core, institute
It states the pure quartz pushrod of N root and quartz socket tube fuses together to form elliptical core fiber covering；
Step 3, high double-refraction elliptical core polarization maintaining optical fibre is made in wire drawing.
5. the manufacturing process of ellipse core polarization maintaining optical fibre according to claim 4, which is characterized in that in the preform
The quantity of plug is 3.
6. the manufacturing process of ellipse core polarization maintaining optical fibre according to claim 4, which is characterized in that in the preform
The quantity of plug is 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443477.XA CN110104945A (en) | 2019-05-27 | 2019-05-27 | For manufacturing the preform of oval core polarization maintaining optical fibre and the manufacturing process of oval core polarization maintaining optical fibre |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443477.XA CN110104945A (en) | 2019-05-27 | 2019-05-27 | For manufacturing the preform of oval core polarization maintaining optical fibre and the manufacturing process of oval core polarization maintaining optical fibre |
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| CN110104945A true CN110104945A (en) | 2019-08-09 |
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| CN201910443477.XA Pending CN110104945A (en) | 2019-05-27 | 2019-05-27 | For manufacturing the preform of oval core polarization maintaining optical fibre and the manufacturing process of oval core polarization maintaining optical fibre |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111559857A (en) * | 2020-04-22 | 2020-08-21 | 无锡法尔胜光电科技有限公司 | Linear polarization-maintaining optical fiber preform and linear polarization-maintaining optical fiber manufacturing method |
| CN112979155A (en) * | 2021-01-14 | 2021-06-18 | 艾菲博(宁波)光电科技有限责任公司 | Eccentric optical fiber stack preparation method and device |
| CN113548797A (en) * | 2021-07-02 | 2021-10-26 | 哈尔滨工程大学 | Preparation method of elliptical core optical fiber |
| CN113698090A (en) * | 2021-09-01 | 2021-11-26 | 北京热刺激光技术有限责任公司 | Optical fiber preform, homogenized optical fiber, and preparation method and application thereof |
| CN113698091A (en) * | 2021-08-20 | 2021-11-26 | 浙江康阔光智能科技有限公司 | Elliptical core polarization maintaining optical fiber preform, elliptical core polarization maintaining optical fiber and manufacturing process thereof |
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| JPS58104033A (en) * | 1981-12-10 | 1983-06-21 | Nippon Telegr & Teleph Corp <Ntt> | Preparation of optical fiber with zero polarization diversity and single linear polarization characteristic |
| JPS5918128A (en) * | 1982-07-16 | 1984-01-30 | Hitachi Cable Ltd | Manufacture of polarization maintaining optical fiber |
| JPS5954637A (en) * | 1982-09-17 | 1984-03-29 | Furukawa Electric Co Ltd:The | Preparation of optical fiber of constant polarization |
| JPS59164505A (en) * | 1983-03-10 | 1984-09-17 | Nippon Telegr & Teleph Corp <Ntt> | Single-polarization single-mode optical fiber |
| CN1216616A (en) * | 1996-04-23 | 1999-05-12 | 康宁股份有限公司 | Elliptical core fiber with axially decreasing aspect ratio and method |
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| JPS58104033A (en) * | 1981-12-10 | 1983-06-21 | Nippon Telegr & Teleph Corp <Ntt> | Preparation of optical fiber with zero polarization diversity and single linear polarization characteristic |
| JPS5918128A (en) * | 1982-07-16 | 1984-01-30 | Hitachi Cable Ltd | Manufacture of polarization maintaining optical fiber |
| JPS5954637A (en) * | 1982-09-17 | 1984-03-29 | Furukawa Electric Co Ltd:The | Preparation of optical fiber of constant polarization |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111559857A (en) * | 2020-04-22 | 2020-08-21 | 无锡法尔胜光电科技有限公司 | Linear polarization-maintaining optical fiber preform and linear polarization-maintaining optical fiber manufacturing method |
| CN112979155A (en) * | 2021-01-14 | 2021-06-18 | 艾菲博(宁波)光电科技有限责任公司 | Eccentric optical fiber stack preparation method and device |
| CN113548797A (en) * | 2021-07-02 | 2021-10-26 | 哈尔滨工程大学 | Preparation method of elliptical core optical fiber |
| CN113698091A (en) * | 2021-08-20 | 2021-11-26 | 浙江康阔光智能科技有限公司 | Elliptical core polarization maintaining optical fiber preform, elliptical core polarization maintaining optical fiber and manufacturing process thereof |
| CN113698090A (en) * | 2021-09-01 | 2021-11-26 | 北京热刺激光技术有限责任公司 | Optical fiber preform, homogenized optical fiber, and preparation method and application thereof |
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Application publication date: 20190809 |