CN206201421U - A kind of graded index profile polymer optical fiber preparation facilities - Google Patents
A kind of graded index profile polymer optical fiber preparation facilities Download PDFInfo
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- CN206201421U CN206201421U CN201621323113.6U CN201621323113U CN206201421U CN 206201421 U CN206201421 U CN 206201421U CN 201621323113 U CN201621323113 U CN 201621323113U CN 206201421 U CN206201421 U CN 206201421U
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- sandwich layer
- optical fiber
- cortex
- junction station
- index profile
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Abstract
The utility model discloses a kind of graded index profile polymer optical fiber preparation facilities, including a cortex extrusion unit, n sandwich layer extrusion unit, junction station, mouth mold, string diameter measurement apparatus, draw-gear and wrap-up, different sandwich layer pellets enter junction station with molten state after respectively enteing n sandwich layer extruder by n gear pump of corresponding connection, and cortex pellet with molten state after cortex extruder by passing through the gear pump for connecting also into junction station；Melt is reached mouth mold by junction station again, and the concentric core/skin composite structures optical fiber outside mouth mold outlet is stretched under certain hauling speed, and cooling and shaping turns into the gradient fiber with required diameter, is then drawn by traction receiving apparatus and is collected by wrap-up；String diameter measurement apparatus are disposed between mouth mold and draw-gear.A kind of graded index profile polymer optical fiber preparation facilities of the utility model carries out dispersion mixing and obtains graded index profile by different refractivity material, it is to avoid use uncertain dopant.
Description
Technical field
Prepared the invention belongs to optical fiber processing technical field, more particularly to a kind of graded index profile polymer optical fiber
Device and method.
Background technology
Polymer optical fiber mainly includes step-refraction index profile optical fiber (abbreviation SI types polymer optical fiber) and gradient refractive index
Rate profile optical fiber (abbreviation GI types polymer optical fiber).Because there is larger intermode dispersion in the former, the transmission bandwidth of optical fiber compared with
Narrow, only about 5MHzkm, is typically only capable to meet the requirement more than low capacity signal transmission in 100m.Such as transmission is typically regarded
Frequency signal demand 6MHzkm bandwidth, transmission high-definition picture need 10MHzkm bandwidth, transmitting digitized vision signal then
Need at least 40MHzkm bandwidth.The bandwidth of SI type polymer optical fibers cannot meet above-mentioned needs, and this defect seriously hinders
Polymer optical fiber is hindered in the large-scale application in communication transfer field.
A kind of method for effectively improving polymer optical fiber bandwidth is the index distribution for changing optical fiber, makes the refractive index of optical fiber
It is distributed to prolong from the center of optical fiber and radially outward tapers into, that is, GI type polymer optical fibers.Since the eighties in 20th century,
Beautiful, Deng states have all proceeded by the development of GI type polymer optical fibers, and it turns into the main direction of studying in polymer optical fiber field.
The main preparation technology of GI type polymer optical fibers is prefabricated stick drawn wire technique and coextrusion processes.The former is in quartz
For many years, development is more ripe for the preparation field application of optical fiber, but because it is made up of two independent steps, that is, prepares prefabricated rods
And wire-drawing shape, there is timing and change the limitations such as prefabricated rods, wire drawing pause and length of string limitation；The latter continuity, plus
It is better than the former on work efficiency rate and reduction optical fiber light loss, is suitable for large-scale commercial production, but rely primarily on one or more
Diffusible dopant of index distribution can on request be changed, there is dopant not clear in extrusion die diffusion process mechanism
Really, the shortcomings of precision is inadequate.
The content of the invention
It is an object of the invention to overcome above technological deficiency, propose a kind of based on the gradient refractive index for being coextruded qualitative reference
Rate distribution polymer fiber preparation apparatus and method, so as to help to control Refractive Index Profile o rule, further explore drop
The optimised process of low optical loss, substantially reduces cost, is conducive to large-scale commercial production.
The present invention uses technical scheme：Quantitatively control refractive index polymer distribution, and basic progressive dispersion herein.
A kind of graded index profile polymer optical fiber preparation facilities, the device includes 1 cortex extrusion unit, n core
Layer extrusion unit, junction station, mouth mold, string diameter measurement apparatus, draw-gear and wrap-up.In the apparatus, different core
Layer pellet enters junction station with molten state after respectively enteing n sandwich layer extruder by n gear pump of corresponding connection, meanwhile,
Cortex pellet with molten state after cortex extruder by passing through the gear pump for connecting also into junction station.Junction station again passes melt
To mouth mold, the concentric core/skin composite structures optical fiber outside mouth mold outlet is stretched under certain hauling speed, cools down in atmosphere
Sizing turns into the gradient fiber with required diameter, is then drawn by traction receiving apparatus and is collected by wrap-up.
The present invention relates to a kind of graded index profile polymer optical fiber preparation facilities, the cloth between mouth mold and draw-gear
Be equipped with string diameter measurement apparatus, it can in real time measure the fibre diameter after stretching cooling, and according to control errors draw-gear and
The operating of wrap-up, the hauling speed of appropriate adjustment optical fiber, constitutes a closed-loop control system, it is ensured that the size essence of optical fiber
Degree.
The present invention relates to a kind of graded index profile polymer optical fiber preparation facilities, junction station includes 1 cortex runner
And n sandwich layer runner.During import, core layer polymer melt is input to the connection sandwich layer of gear pump 1 runner 1 circle of junction station
Sandwich layer 1 is formed in shape central passage；Gear pump 2 is connected to sandwich layer runner 2, and core layer polymer melt is disperseed by taper to be input into
Sandwich layer 2 is formed to junction station central passage periphery annulus layer；The n that sequentially forms sandwich layer 3 ...；Meanwhile, cortex gear pump connection cortex
Runner disperses cortex polymer melt by taper to be input to the outermost circle circular layer cortex of junction station.Each runner passes through above
Corresponding gear pump control flow is uniform to ensure each layer.
The present invention relates to a kind of graded index profile polymer optical fiber preparation facilities, n sandwich layer extruder group is fed respectively
Material, is than larger sandwich layer pellet A, B (A by two kinds of refractive index>B) constitute, 1 to n extrusion unit corresponding A, two kinds of B
The mixed proportion of material is respectively a1:b1、a2:b2、a3:b3、…、an:Bn, wherein, a1 ＞ a2 ＞ a3 ＞ ... ＞ an, b1<b2<
b3<…<bn.So that the material A into co-extruding machine head is gradually decreased by center to surrounding, and material B is by center to surrounding
Gradually increase.Due to the refractive index of the refractive index more than B of A, therefore the refractive index k1 from center to surrounding>k2>k3…>Kn, and then
The uniform sandwich layer composite construction of index distribution is obtained, fiber bandwidth can be effectively improved.
From above technical scheme, the present invention has the following advantages that compared with prior art：(1) directly by it is existing not
Dispersion mixing is carried out with refractive index material and obtain graded index profile, it is to avoid use uncertain dopant；(2) can be effective
Mixing and dispersion, reduce jitter time, improve processing efficiency, and process stablizes controllable.
Brief description of the drawings
Fig. 1 is a kind of connection diagram of graded index profile polymer optical fiber preparation facilities；
Fig. 2 is a kind of section runner distribution of graded index profile polymer optical fiber preparation facilities co-extruding machine head and connects
Schematic diagram；
Fig. 3 is a kind of fiber cross-sections schematic diagram of graded index profile polymer optical fiber preparation facilities extrusion.
In figure：1- sandwich layers extruder one, 2- gear pumps one, 3- gear pumps two, 4- sandwich layers extruder two, 5- cortex gears
Pump, 6- cortex extruders, 7- gear pumps three, 8- sandwich layers extruder three, 9- gear pumps n, 10- sandwich layer extruder n, 11- junction station,
12- mouth molds, 13- string diameter measurement apparatus, 14- draw-gears, 15- wrap-ups, 16- sandwich layer runner n, 17- sandwich layers runner three,
18- cortex runners, 19- sandwich layers runner two, 20- sandwich layers runner one.
Specific embodiment
A kind of graded index profile polymer optical fiber preparation facilities proposed by the present invention, as shown in figure 1, the device includes
One cortex extrusion unit, n sandwich layer extrude unit, junction station 11, mouth mold 12, string diameter measurement apparatus 13, draw-gear 14 with
And wrap-up 15.Cortex extrusion unit includes cortex gear pump 5 and cortex extruder 6, and n sandwich layer extrusion unit includes sandwich layer
Extruder 1, gear pump 1, gear pump 23, sandwich layer extruder 24, gear pump 37, sandwich layer extruder 38, gear pump n9,
Sandwich layer extruder n10；In the apparatus, different sandwich layer pellets passes through phase after respectively enteing n sandwich layer extruder with molten state
The n gear pump that should be connected enters junction station 11, meanwhile, cortex pellet with molten state after cortex extruder 6 by passing through connection
Gear pump 5 also into junction station 11.Melt is reached mouth mold 12 by junction station 11 again, and the concentric core/skin outside the outlet of mouth mold 12 is multiple
Close structured optical fiber to be stretched under certain hauling speed, cooling and shaping turns into the gradient type with required diameter in atmosphere
Optical fiber, is then drawn by traction receiving apparatus 14 and is collected by wrap-up 15.
The present invention relates to a kind of graded index profile polymer optical fiber preparation facilities, as shown in figure 1, in mouth mold 12 and leading
String diameter measurement apparatus 13 are disposed between leading-in device 14, it can in real time measure the fibre diameter after stretching cooling, and according to by mistake
The operating of difference control draw-gear 14 and wrap-up 15, the hauling speed of appropriate adjustment optical fiber, constitutes a closed-loop control system
System, it is ensured that the dimensional accuracy of optical fiber.
The present invention relates to a kind of graded index profile polymer optical fiber preparation facilities, as shown in Figure 2,3, junction station 11 is wrapped
Include a cortex runner 18 and n sandwich layer runner, i.e. sandwich layer runner n16, sandwich layer runner 3 17, sandwich layer runner 2 19 and sandwich layer
Runner 1.During import, core layer polymer melt is input to the connection sandwich layer of gear pump 1 runner 1 circle of junction station 11
Sandwich layer 1 is formed in shape central passage；Gear pump 23 is connected to sandwich layer runner 2 19, by core layer polymer melt by taper point
Dissipate and be input to the central passage of junction station 11 periphery annulus layer formation sandwich layer 2；The sandwich layer n that sequentially forms sandwich layer 3 ...；Meanwhile, cortex tooth
The connection cortex of wheel pump 5 runner 18 disperses cortex polymer melt by taper to be input to the outermost circle circular layer skin of junction station 11
Layer.Each runner controls flow uniform to ensure each layer by corresponding gear pump above.
The present invention relates to a kind of graded index profile polymer optical fiber preparation facilities, as shown in figure 1, n sandwich layer extrusion
Unit distinguishes feeding, is than larger sandwich layer pellet A, B (A by two kinds of refractive index>B) constitute, 1 to n extrusion unit
Corresponding A, the mixed proportion of two kinds of materials of B are respectively a1:b1、a2:b2、a3:b3、…、an:Bn, wherein, a1 ＞ a2 ＞ a3 ＞ ...
＞ an, b1<b2<b3<…<bn.So that the material A into co-extruding machine head is gradually decreased by center to surrounding, and material B by
Gradually increase to surrounding at center.Refractive index due to A refractive indexes more than B, therefore the refractive index k1 from center to surrounding>k2>k3>…
>Kn, and then the uniform sandwich layer composite construction of index distribution is obtained, fiber bandwidth can be effectively improved.
Claims (3)
1. a kind of graded index profile polymer optical fiber preparation facilities, it is characterised in that：Including cortex extrusion unit, a n
Individual sandwich layer extrusion unit, junction station, mouth mold, string diameter measurement apparatus, draw-gear and wrap-up, different sandwich layer pellets point
Junction station is not entered by n gear pump of corresponding connection with molten state into after n sandwich layer extruder, cortex pellet is by skin
The gear pump for connecting is passed through also into junction station with molten state after layer extruder；Melt is reached mouth mold by junction station again, and mouth mold goes out
Concentric core/skin composite structures optical fiber outside mouthful is stretched under certain hauling speed, and cooling and shaping turns into and has in atmosphere
The gradient fiber of required diameter, is then drawn by traction receiving apparatus and is collected by wrap-up；In mouth mold and draw-gear
Between be disposed with string diameter measurement apparatus.
2. a kind of graded index profile polymer optical fiber preparation facilities according to claim 1, it is characterised in that：Junction station bag
A cortex runner and n sandwich layer runner are included, during import, the connection sandwich layer of gear pump one runner one, by core layer polymer melt
It is input to formation sandwich layer 1 in the circular central passage of junction station；Gear pump two is connected to sandwich layer runner two, and core layer polymer is melted
Body disperses to be input to junction station central passage periphery annulus layer formation sandwich layer 2 by taper；The sandwich layer n that sequentially forms sandwich layer 3 ...；Together
When, cortex gear pump connects cortex runner to be disperseed cortex polymer melt by taper to be input to the outermost circle circular layer of junction station
Cortex.
3. a kind of graded index profile polymer optical fiber preparation facilities according to claim 1, it is characterised in that：N sandwich layer
Extruder group distinguishes feeding, is made up of than larger sandwich layer pellet A, B two kinds of refractive index, 1 to n extrusion unit pair
Answer the two kinds of mixed proportion of material respectively a1 of A, B:b1、a2:b2、a3:b3、…、an:Bn, wherein, a1 ＞ a2 ＞ a3 ＞ ... ＞
An, b1<b2<b3<…<bn；So that the material A into co-extruding machine head is gradually decreased by center to surrounding, and material B is in
The heart gradually increases to surrounding；Due to the refractive index of the refractive index more than B of A, therefore the refractive index k1 from center to surrounding> k2>k3…
>Kn, and then obtain the uniform sandwich layer composite construction of index distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621323113.6U CN206201421U (en) | 2016-12-05 | 2016-12-05 | A kind of graded index profile polymer optical fiber preparation facilities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621323113.6U CN206201421U (en) | 2016-12-05 | 2016-12-05 | A kind of graded index profile polymer optical fiber preparation facilities |
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| Publication Number | Publication Date |
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| CN206201421U true CN206201421U (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621323113.6U Expired - Fee Related CN206201421U (en) | 2016-12-05 | 2016-12-05 | A kind of graded index profile polymer optical fiber preparation facilities |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106476237A (en) * | 2016-12-05 | 2017-03-08 | 北京化工大学 | A kind of graded index profile polymer optical fiber preparation facilities |
-
2016
- 2016-12-05 CN CN201621323113.6U patent/CN206201421U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106476237A (en) * | 2016-12-05 | 2017-03-08 | 北京化工大学 | A kind of graded index profile polymer optical fiber preparation facilities |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20191205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |