CN1758079A - Double-cor plastic optical fiber and its preparation method - Google Patents
Double-cor plastic optical fiber and its preparation method Download PDFInfo
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- CN1758079A CN1758079A CN 200510021716 CN200510021716A CN1758079A CN 1758079 A CN1758079 A CN 1758079A CN 200510021716 CN200510021716 CN 200510021716 CN 200510021716 A CN200510021716 A CN 200510021716A CN 1758079 A CN1758079 A CN 1758079A
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Abstract
This invention provides a compound core plastic fiber including at least two cores and a cladding covering the cores, which not only has the advantage of ordinary plastic fibers, but also has the advantage of high bandwidth and high transmission intensity of fibers. This invention also provides a method for preparing compound core plastic fibers.
Description
Technical field:
The present invention is relevant with the multimedia messages transferring material field of information communication, and is special relevant with double-cor plastic optical fiber and preparation method thereof.
Background technology:
Information explosion since the eighties in 20th century has caused the rapid increase of data transmission, the long haul communication technology and the display technique of fast development have promoted multimedia development such as INTERNET data communication, HDTV, video request program, videophone, video conference, work-at-home, not only make the rush of demand of user to communication bandwidth, but also need the transfer rate in Local Area Network reach 1Gbps, even reach 10Gbps.
Plastic optical fiber claims polymer optical fiber again, be polymeric optical transparent material with high index of refraction as fibre core, with the polymeric optical transparent material of low-refraction as covering.By the index distribution difference, can divide phase step type plastics optical fibre and gradient plastic fibers.
Plastic optical fiber has many good qualities in the short-range data transmission, and at first the diameter of plastic optical fiber and numerical aperture are big, make low, the simple installation of its connection request, can use cheap injection moulding connector; Secondly plastic optical fiber proportion is little, pliability good, is easy to lay in narrow space, is particularly suitable for the communication network of automobile, buildings, aircraft and cabin inside; At last, plastic optical fiber is insensitive to electromagnetic interference (EMI), and radiation does not take place, and the decay under the different pieces of information speed is constant, and the measurable bit error rate can be used in electrical noise environment.The broad prospect of application of plastic optical fiber in LAN (Local Area Network) makes it become current domestic and international research focus.
The production of phase step type plastics optical fibre has at present realized suitability for industrialized production, but its bandwidth is at 50～250MHz100m, and during as short distance high-speed local area network information transmitting medium, its bandwidth advantages is not clearly.Though and the gradient plastic fibers bandwidth can reach 250MHz100m～10GHzkm, it prepares complicated, costs an arm and a leg, and is difficult to realize industrialization.
Summary of the invention:
The objective of the invention is for a kind of information transmission medium that both can be used as high broadband is provided, also can be used as the sharpness height, the double-cor plastic optical fiber that the high medium of fidelity matter uses, another object of the present invention is for the saving equipment investment is provided, and is easy to the preparation method of suitability for industrialized production, double-cor plastic optical fiber that production efficiency is high.
The object of the present invention is achieved like this:
Double-cor plastic optical fiber of the present invention comprises at least two cores, be coated on the covering on the core, core material can be polyacrylate/poly-fluoroacrylate, polystyrene type and polycarbonate-based, its covering can be poly-fluoroacrylate or tygon base class fluororesin, the quantity of core depends on the needs, and can be two cores, three cores, four-core, five cores, six cores, seven cores, eight cores etc.
Above-mentioned core diameter is 0.05～1.0mm, and fibre diameter is 0.25～3.0mm.
The refractive index of above-mentioned clad material is 1.3～1.6mm, and the core refractive index is higher by 1% than the refractive index of clad material at least.
The preparation method of double-cor plastic optical fiber of the present invention is that core material and clad material is compound in the moulding die orifice again after core material extruder and covering material extruder enter at least two core rod molding runners the coextrusion die head and covering material runner respectively, promptly makes double-cor plastic optical fiber through traction, cooling and shaping again.In producing the double-cor plastic optical fiber process, use two extruders, one is used for the fusion plastification core, another is used for the fusion plastification clad material, two extruders is by extrusion die connection altogether, melt extrude extrudate with multiple cored structure, through traction, cooling and shaping, take-up, promptly obtain double-cor plastic optical fiber.Two extruders can be 90 °, 180 ° connections.
Enter the core rod molding runners that communicates with it again after dividing equally through the core material shunting coning tower tray road identical again after above-mentioned core material is extruded from the core material extruder with core rod molding runners quantity, enter covering material runner material again after dividing equally through at least two covering material shunting coning tower tray roads after the covering material is extruded from the clad material extruder, be evenly distributed.
Double-cor plastic optical fiber of the present invention comprises a plurality of biography light unit, because each biography light element diameter is little, causes its transmission bandwidth height.Enough little as diameter, its transport property is identical with single mode.Simultaneously total biography light area big (a plurality of biography light cellar area sum) can transmit more luminous energy.Therefore the information transmission bandwidth performance of this plastic optical fiber is better than the multimode plastic optical fiber of same diameter, it passes the multimode plastic optical fiber of the characteristic of luminous energy near same diameter simultaneously, both can be used as the information transmission medium of high bandwidth, the biography that also can be used as high definition, high-fidelity is used as medium.
Double-cor plastic optical fiber of the present invention has the advantage of general plastic optical fiber, simultaneously, has high bandwidth, has improved the advantage of the light transmission density of optical fiber; Its production method is simple, save equipment investment, be easy to industrialization, enhances productivity.
Description of drawings:
Fig. 1 is a four-core double-cor plastic optical fiber synoptic diagram.
Fig. 2 is a double-cor plastic optical fiber production line synoptic diagram.
Fig. 3 is the coextrusion die head synoptic diagram of double-cor plastic optical fiber production line.
Fig. 4 eight core double-cor plastic optical fiber synoptic diagram.
Embodiment:
Embodiment 1:
Referring to Fig. 1, the four-core double-cor plastic optical fiber that the covering 2 that present embodiment 1 double-cor plastic optical fiber is made by four cores of being made by optical grade poly-methyl acrylate (PMMA) material respectively 1 and the high transparent fluororesin of usefulness that is coated on core 1 periphery is formed.
Fig. 2 is double-cor plastic optical fiber product line device figure.Comprise coextrusion die head 3, the core material extruder 4 that connects of extrusion die together, covering material extruder 5, traction engine 6, Laser Measuring is regulated traction engine piston apparatus 8 admission machines 9 consistent with admission machine speed through instrument 7.Fig. 3 is the structural representation of coextrusion die head 3.Comprise core material feeding mouth 10, four core materials that are distributed on the die head that communicate with the core material discharging opening are shunted coning tower tray roads 11, the core rod 14 that contains the core rod runner 13 that four two ends communicate with four core materials shunting coning tower tray roads and moulding die orifice 12 respectively, covering material feeding mouth 15, the covering material that communicates with covering material discharging opening shunting coning tower tray road 16 is positioned at the covering material runner 18 that the two ends of 14 of die cap 17 and core rods communicate with covering material shunting coning tower tray road and moulding die orifice respectively.
Referring to Fig. 2, Fig. 3, optical grade PMMA core material is passed through core material extruder 4 fusion plastifications, enter core material feeding mouth 10, and enter the shaping mould mouth behind the 13 one-tenth cores of core rod runner that enter on the core rod 14 through core material shunting coning tower tray road 11, and high transparent fluororesin is by covering material extruder 5 fusion plastifications, enter covering material feeding mouth 15, entering covering material runner 18 between die cap and core rod through covering material shunting coning tower tray road 16 enters moulding die orifice 12 again and is coated on core 1 periphery, pass through traction engine 6, cooling and shaping, take-up again, obtain the four-core double-cor plastic optical fiber.Control the rotating speed and the traction rotating speed of core material extruder simultaneously, obtain the four-core double-cor plastic optical fiber of core diameter 0.25mm, fibre diameter 1.0mm.The refractive index of clad material is 1.3, and the core refractive index is 1.49.
Also can enter the core material feeding mouth, and enter the moulding die orifice again after entering core rod runner Cheng Xin by core material shunting coning tower tray road with optical grade PMMA core material by core material extruder fusion plastification; And high transparent fluororesin is by covering material extruder fusion plastification, enter covering material feeding mouth, the covering material runner that enters between die cap and core rod through covering material shunting coning tower tray road enters the periphery that the moulding die orifice is coated on core again, pass through traction, cooling and shaping, take-up again, obtain the four-core double-cor plastic optical fiber.Control the rotating speed and the traction rotating speed of core material extruder simultaneously, obtain the four-core double-cor plastic optical fiber of core diameter 0.5mm, fibre diameter 1.5mm.The refractive index of clad material is 1.3, and the core refractive index is 1.49.
Embodiment 2:
Referring to Fig. 4, the eight core double-cor plastic optical fibers that the covering 2 that present embodiment 2 double-cor plastic optical fibers are made by eight cores of being made by optical grade polymethacrylate (PMMA) material respectively 1 and the high transparent fluororesin of usefulness that is coated on core 1 periphery is formed.
The device of production present embodiment 2 eight cores is basic and embodiment 1 is same.Do not exist together is that core material shunting coning tower tray road and core rod in the coextrusion die head is respectively eight.
Optical grade PMMA core material by core material extruder fusion plastification, is entered the core material feeding mouth, and enter the shaping mould mouth after entering core rod runner Cheng Xin by core material shunting coning tower tray road; And high transparent fluororesin is by covering extruder fusion plastification, enter covering material feeding mouth, enter through covering material shunting coning tower tray road and to enter the shaping mould mouth behind the covering material runner between die cap and core rod and be coated on the core periphery, pass through traction, cooling and shaping, take-up again, obtain eight core double-cor plastic optical fibers.Control the rotating speed and the traction rotating speed of core material extruder simultaneously, obtain the eight core double-cor plastic optical fibers of core diameter 0.2mm, fibre diameter 1.0mm.The refractive index of clad material is 1.3, and the core refractive index is 1.49.
The various embodiments described above are that foregoing of the present invention is further described, but this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to the foregoing description.All technology that realizes based on foregoing all belong to scope of the present invention.
Claims (5)
1, double-cor plastic optical fiber is characterized in that comprising at least two cores, is coated on the covering on the core.
2, double-cor plastic optical fiber as claimed in claim 1 is characterized in that core diameter is 0.05～1.0mm, and fibre diameter is 0.25～3.0mm.
3, the preparation method of double-cor plastic optical fiber as claimed in claim 1 or 2, the refractive index that it is characterized in that clad material is 1.3～1.6mm, the core material refractive index is higher by 1% than the refractive index of clad material at least.
4, the preparation method of double-cor plastic optical fiber as claimed in claim 1 or 2, it is characterized in that this method is that core material and clad material is compound in the moulding die orifice again after core material extruder and covering material extruder enter at least two core rod molding runners the coextrusion die head and covering material runner respectively, promptly makes double-cor plastic optical fiber through traction, cooling and shaping.
5, the preparation method of double-cor plastic optical fiber as claimed in claim 4, entering the core rod molding runners that communicates with it again after it is characterized in that dividing equally through the core material identical shunting coning tower tray road again after core material is extruded from the core material extruder, entering covering material runner again after dividing equally through at least two covering material shunting coning tower tray roads after clad material is extruded from covering material extruder with core rod molding runners quantity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510021716 CN1758079A (en) | 2005-09-23 | 2005-09-23 | Double-cor plastic optical fiber and its preparation method |
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| CN 200510021716 CN1758079A (en) | 2005-09-23 | 2005-09-23 | Double-cor plastic optical fiber and its preparation method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238004A (en) * | 2013-06-18 | 2014-12-24 | 深圳市中技源专利城有限公司 | Multi-core plastic optical fibers and plastic optical fiber cable |
| JP2019003162A (en) * | 2017-06-20 | 2019-01-10 | 旭化成株式会社 | Plastic optical fiber and plastic optical fiber cable |
| CN109870762A (en) * | 2019-02-27 | 2019-06-11 | 南宁旭越光纤有限责任公司 | Low decaying plastic optical fiber of one kind and preparation method thereof |
| CN110685027A (en) * | 2019-09-04 | 2020-01-14 | 苏州大学 | Method for preparing polymer optical fiber |
| CN111118658A (en) * | 2019-12-06 | 2020-05-08 | 湖北森沃光电科技有限公司 | Extrusion type super-flexible side light-emitting optical fiber and preparation method thereof |
-
2005
- 2005-09-23 CN CN 200510021716 patent/CN1758079A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238004A (en) * | 2013-06-18 | 2014-12-24 | 深圳市中技源专利城有限公司 | Multi-core plastic optical fibers and plastic optical fiber cable |
| JP2019003162A (en) * | 2017-06-20 | 2019-01-10 | 旭化成株式会社 | Plastic optical fiber and plastic optical fiber cable |
| JP7133290B2 (en) | 2017-06-20 | 2022-09-08 | 旭化成株式会社 | Plastic optical fiber and plastic optical fiber cable |
| CN109870762A (en) * | 2019-02-27 | 2019-06-11 | 南宁旭越光纤有限责任公司 | Low decaying plastic optical fiber of one kind and preparation method thereof |
| CN110685027A (en) * | 2019-09-04 | 2020-01-14 | 苏州大学 | Method for preparing polymer optical fiber |
| CN111118658A (en) * | 2019-12-06 | 2020-05-08 | 湖北森沃光电科技有限公司 | Extrusion type super-flexible side light-emitting optical fiber and preparation method thereof |
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