CN103472531A - Low-attenuation high temperature resistance optical fiber - Google Patents
Low-attenuation high temperature resistance optical fiber Download PDFInfo
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- CN103472531A CN103472531A CN2013104411520A CN201310441152A CN103472531A CN 103472531 A CN103472531 A CN 103472531A CN 2013104411520 A CN2013104411520 A CN 2013104411520A CN 201310441152 A CN201310441152 A CN 201310441152A CN 103472531 A CN103472531 A CN 103472531A
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Abstract
The invention relates to a low-attenuation high temperature resistance optical fiber which comprises a silica fiber. An inner coating and an outer coating wraps the outer surface of the silica fiber from inside to outside in sequence. The low-attenuation high temperature resistance optical fiber is characterized in that the inner coating is made of modified silicone rubber coating materials, the outer coating is made of polyimide coating materials, the inner coating and the outer coating are both formed through thermal curing, and the thickness of the radial single edge of each coating is 16-25microns. According the low-attenuation high temperature resistance optical fiber, the inner coating is small in modulus, high in tensile strength and capable of playing a good buffering role, effectively protecting the silica fiber, improving the mechanical properties of the silicon fiber and optimizing the transmission characteristics of the optical fiber; by means of the recombination of the inner high temperature resistance coating and the outer high-temperature resistance coating, the silica fiber is made to be work normally and maintain low attenuation in environments with 300DEG C high temperature, and thus the application characteristics of the silicon fiber are improved greatly, the silicon fiber can be applied to high-temperature severe working environments, the long-period using temperature reaches 300DEG C, and thus the application field of the silica fiber is expanded; the low-attenuation high temperature resistance optical fiber is simple in coating structure and easy and convenient to manufacture.
Description
Technical field
The present invention relates to a kind of low decay high-temperature resistant optical fiber, belong to optical fiber communication and field of sensing technologies under the severe particular surroundings of high temperature.
Background technology
At present, along with developing rapidly of special optical fiber technology, its range of application has extended to various high temperature rugged environment systems, optics and mechanical property to optical fiber require also day by day improving, need optical fiber still to keep good optical characteristics in higher environment temperature under as the service condition of 300 ℃, better play a role in fields such as Aero-Space, military project, equipments.
The coating material on silica fibre surface is very large on the impact of optical fiber property, and the serviceability temperature of silica fibre is mainly determined by the performance of its coating material.The common manufacture of high-temperature resistant optical fiber is coating polyimide coating outside silica fibre, through the high temperature heat curing, makes, and Chinese patent CN 200986600Y, CN 101726792 B, CN 202421534 U and CN 202421535 UD etc. all mention.The existing design concept of this type optical fiber is: introduce the high-temperature resistant coating polyimide and make coat, improve the hot properties of optical fiber, but the elastic modulus of polyimide paint generally is greater than 2GPa, even up to hundreds of GPa, directly be coated on the silica fibre surface and make optical fiber be subject to very large stress, cut down greatly its transmission performance, the defect shown in actual applications is that the decay of optical fiber is generally very high, cause it to use length usually in 1～2km left and right, the even only hundreds of rice ability normal transmission signal had, and the mechanical fiber optic performance is also poor, the segment length of output is shorter.Usually the single mode of polyimide coating and multimode optical fiber decay are all larger, and can only under zero tension state, test its decay: single-mode fiber HT 9/125-14/155 is 0.698dB/km at 1310nm window attenuation coefficient, at 1550nm window attenuation coefficient, is 0.370dB/km; Multimode optical fiber HTG 50/125-20/155 is 3.49dB/km at 850nm window attenuation coefficient, at 1300nm window attenuation coefficient, is 1.70dB/km; Multimode optical fiber HTG 62.5/125-27/155 is 2.89dB/km at 850nm window attenuation coefficient, at 1300nm window attenuation coefficient, is 0.67dB/km.Chinese patent CN 202133795 U disclose a kind of can self-compensating high-temperature resistant optical fiber, the high-temperature stability of negative expansion coating wherein do not described, the fade performance of optical fiber is not studied in great detail yet.
Summary of the invention
Technical matters to be solved by this invention is that the deficiency existed for above-mentioned prior art has proposed a kind of low decay high-temperature resistant optical fiber, and it can effectively protect silica fibre, improves its mechanical property, and keeps preferably transport property.
The technical scheme that the problem that the present invention is the above-mentioned proposition of solution adopts is: a kind of low decay high-temperature resistant optical fiber, comprise silica fibre, the silica fibre outside surface coats internal coating and external coating from the inside to the outside successively, it is characterized in that described internal coating is modified silicon rubber coating coat, described external coating is the polyimide paint coat, inside and outside coating all forms through heat curing, and the radially monolateral thickness of each coating is 16～25 μ m.
Press such scheme, described silica fibre is single-mode fiber or multimode optical fiber.
Press such scheme, described silica fibre comprises sandwich layer and covering, at covering outer cladding internal coating and external coating.
Press such scheme, described silica fibre cladding diameter is 125 μ m.
Press such scheme, described modified silicon rubber coating is the macromolecular compound that contains the silicon oxygen bond link, and the elastic modulus after coat solidifies is 0.7～3MPa.
Press such scheme, described modified silicon rubber coating is organic-silicon-modified silicon rubber, and after solidifying, its elastic modulus is 2.0MPa, and operating ambient temperature range is-70～300 ℃.
Press such scheme, described polyimide paint is the aromatic heterocycle polymer compound that contains the imide link, and the elastic modulus after coat solidifies is 2～8GPa, and operating ambient temperature range is-65～300 ℃.
Press such scheme, described polyimide paint is the polyimide paint that model is ZKPI-306H, it is a kind of high-purity polyimide forebody-polyamic acid solution, directly change into the polyimide tunic after heat curing, pulling strengrth after solidifying is more than or equal to 150MPa, elastic modulus is more than or equal to 3.0 GPa, glass temperature is more than or equal to 400 ℃, initial decomposition temperature is more than or equal to 500 ℃, 5% weightless temperature is more than or equal to 550 ℃, 10% weightless temperature is more than or equal to 580 ℃, has excellent heat resistance and mechanical property.
Press such scheme, the radially monolateral thickness of each coating of described internal coating and external coating is 16～25 μ m.
Beneficial effect of the present invention is: 1, the internal coating of silica fibre is the modified silicon rubber coat, because this coat modulus is little, pulling strengrth is higher, fracture elongation is larger, adaptability flexible to basic unit or craze and transfiguration is stronger, can play buffer action preferably, can effectively protect silica fibre, improve its mechanical property, optimize the transport property of optical fiber; 2, pass through the compound of inside and outside two high temperature resistant coats, make silica fibre to work under 300 ℃ of hot environments and to keep lower decay, thereby greatly improved the application characteristic of optical fiber, can be used for the severe working environment of high temperature, long-term serviceability temperature reaches the high temperature of 300 ℃, has expanded the application of silica fibre; 3, fibre coating of the present invention is simple in structure, simple for production.
The accompanying drawing explanation
The optical fiber radial section structural representation that Fig. 1 is one embodiment of the invention.
The changing trend diagram that Fig. 2 is a kind of multi-mode structure optical fiber HTG 50/125-20/200 of the present invention and individual layer polyimide coated optical fiber HTG 50/125-20/155 850nm attenuation coefficient under the equal temperature condition.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Silica fibre comprises sandwich layer 1 and covering 2, the silica fibre outside surface is that the covering outside surface coats internal coating 3 and external coating 4 from the inside to the outside successively, described internal coating is modified silicon rubber coating coat, and described external coating is the polyimide paint coat, and inside and outside coating all forms through heat curing.
Embodiment 1:
Sandwich layer, covering and inside and outside coating structure are as shown in Figure 1, make single mode structure 9/125 μ m silica fibre, inside and outside coating is respectively modified silicon rubber coating coat and polyimide paint coat, wherein said modified silicon rubber coating is that organic-silicon-modified silicon rubber OF-182(buys from Japanese SHIN-ETSU HANTOTAI paint company), after solidifying, its elastic modulus is 2.0MPa, and operating ambient temperature range is-70～280 ℃; Described polyimide paint is the polyimide paint that model is ZKPI-306H, it is a kind of high-purity polyimide forebody-polyamic acid solution, directly change into the polyimide tunic after heat curing, pulling strengrth after solidifying is more than or equal to 150MPa, elastic modulus is more than or equal to 3.0GPa, glass temperature is more than or equal to 400 ℃, the internal coating external diameter is 165 μ m, the external coating external diameter is 200 μ m, optical fiber is 0.315dB/km at 1310nm place pad value, at the 1550nm place, pad value is 0.201dB/km, and fiber segment is grown up in 10km.
Embodiment 2:
Sandwich layer, covering and coating layer are as shown in Figure 1, make multi-mode structure 50/125 μ m silica fibre, inside and outside coating is respectively modified silicon rubber coating coat and polyimide paint coat, wherein said modified silicon rubber coating is organic-silicon-modified silicon rubber OF-180, condition of cure is 150 ℃ of heat curing 30min, after solidifying, its elastic modulus is 1.0MPa, and operating ambient temperature range is-70～300 ℃; Described polyimide paint is the polyimide paint that model is ZKPI-306I, condition of cure is 200 ℃ of heat curing 40min, elastic modulus 3.0GPa after solidifying, and the temperature resistant grade of coating is all-65 ℃～+ 300 ℃, the internal coating external diameter is 162 μ m, and coating is outer through being 202 μ m.Optical fiber is 2.23dB/km at 850nm place pad value, at the pad value of 1300nm, is 0.42dB/km, and fiber segment is grown up in 8km.
Embodiment 3:
Sandwich layer, covering and coating layer are as shown in Figure 1, make multi-mode structure 62.5/125 μ m silica fibre, inside and outside coating is respectively modified silicon rubber coating coat and polyimide paint coat, wherein said modified silicon rubber coating is organic-silicon-modified silicon rubber OF-101, condition of cure is 150 ℃ of heat curing 30min, after solidifying, its elastic modulus is 1.8MPa, and operating ambient temperature range is-70～300 ℃; Described polyimide paint is the polyimide paint that model is ZKPI-306II, condition of cure is 200 ℃ of heat curing 35min, elastic modulus 2.8 GPa after solidifying, and the temperature resistant grade of coating is all-65 ℃～+ 300 ℃, the internal coating external diameter is 164 μ m, and coating is outer through being 199 μ m.Optical fiber is 2.62dB/km at 850nm place pad value, at the pad value of 1300nm, is 0.51dB/km, and fiber segment is grown up in 8km.
Claims (8)
1. one kind is hanged down the decay high-temperature resistant optical fiber, comprise silica fibre, the silica fibre outside surface coats internal coating and external coating from the inside to the outside successively, it is characterized in that described internal coating is modified silicon rubber coating coat, described external coating is the polyimide paint coat, inside and outside coating all forms through heat curing, and the radially monolateral thickness of each coating is 16～25 μ m.
2. by low decay high-temperature resistant optical fiber claimed in claim 1, it is characterized in that described silica fibre is single-mode fiber or multimode optical fiber.
3. by the described low decay high-temperature resistant optical fiber of claim 1 or 2, it is characterized in that described silica fibre comprises sandwich layer and covering, at covering outer cladding internal coating and external coating.
4. by low decay high-temperature resistant optical fiber claimed in claim 3, it is characterized in that described fibre cladding diameter is 125 μ m.
5. by the described low decay high-temperature resistant optical fiber of claim 1 or 2, it is characterized in that described modified silicon rubber coating is the macromolecular compound that contains the silicon oxygen bond link, the elastic modulus after coat solidifies is 0.7～3MPa.
6. by low decay high-temperature resistant optical fiber claimed in claim 5, it is characterized in that described modified silicon rubber coating is organic-silicon-modified silicon rubber, after solidifying, its elastic modulus is 2.0MPa, and operating ambient temperature range is-70～300 ℃.
7. by the described low decay high-temperature resistant optical fiber of claim 1 or 2, it is characterized in that described polyimide paint is the aromatic heterocycle polymer compound that contains the imide link, elastic modulus after coat solidifies is 2～8GPa, and operating ambient temperature range is-65～300 ℃.
8. by low decay high-temperature resistant optical fiber claimed in claim 7, it is characterized in that described polyimide paint is the polyimide paint that model is ZKPI-306H, it is a kind of high-purity polyimide forebody-polyamic acid solution, pulling strengrth after solidifying is more than or equal to 150MPa, elastic modulus is more than or equal to 3.0 GPa, glass temperature is more than or equal to 400 ℃, initial decomposition temperature is more than or equal to 500 ℃, 5% weightless temperature is more than or equal to 550 ℃, and 10% weightless temperature is more than or equal to 580 ℃.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777269A (en) * | 2014-01-15 | 2014-05-07 | 烽火通信科技股份有限公司 | High-temperature-resistance optical fiber |
| CN103941331A (en) * | 2014-05-07 | 2014-07-23 | 江苏亨通光纤科技有限公司 | Polyimide coated optical fiber and machining process thereof |
| CN108169845A (en) * | 2018-02-26 | 2018-06-15 | 江苏法尔胜光电科技有限公司 | Class rectangle panda type polarization-preserving fiber |
| CN110304821A (en) * | 2019-07-16 | 2019-10-08 | 成都中住光纤有限公司 | A kind of small diameter fiber and its manufacturing method of low attenuation change |
| CN112904475A (en) * | 2021-01-29 | 2021-06-04 | 长飞光纤光缆股份有限公司 | Single-mode sensing optical fiber and application thereof |
| CN114035266A (en) * | 2022-01-10 | 2022-02-11 | 中天科技光纤有限公司 | Small-diameter optical fiber and preparation method thereof |
| CN114280720A (en) * | 2021-12-28 | 2022-04-05 | 长飞光纤光缆股份有限公司 | Optical fiber, coating and optical signal sensing system |
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| CN201488836U (en) * | 2009-04-20 | 2010-05-26 | 江苏通鼎光电股份有限公司 | Sensing optical cable for detecting strain and temperature |
| JP2012150360A (en) * | 2011-01-20 | 2012-08-09 | Mitsubishi Cable Ind Ltd | Optical fiber wiring structure and manufacturing method thereof |
| CN102692675A (en) * | 2012-05-28 | 2012-09-26 | 长飞光纤光缆有限公司 | Gradual refractive index bending resistant multimode optical fiber |
| CN202522744U (en) * | 2012-03-21 | 2012-11-07 | 长飞光纤光缆有限公司 | High temperature and voltage resistant optical cable |
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Patent Citations (5)
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| CN101446664A (en) * | 2008-11-25 | 2009-06-03 | 江苏亨通光电股份有限公司 | Hollow quartz plastic special optical fiber |
| CN201488836U (en) * | 2009-04-20 | 2010-05-26 | 江苏通鼎光电股份有限公司 | Sensing optical cable for detecting strain and temperature |
| JP2012150360A (en) * | 2011-01-20 | 2012-08-09 | Mitsubishi Cable Ind Ltd | Optical fiber wiring structure and manufacturing method thereof |
| CN202522744U (en) * | 2012-03-21 | 2012-11-07 | 长飞光纤光缆有限公司 | High temperature and voltage resistant optical cable |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777269A (en) * | 2014-01-15 | 2014-05-07 | 烽火通信科技股份有限公司 | High-temperature-resistance optical fiber |
| CN103941331A (en) * | 2014-05-07 | 2014-07-23 | 江苏亨通光纤科技有限公司 | Polyimide coated optical fiber and machining process thereof |
| CN108169845A (en) * | 2018-02-26 | 2018-06-15 | 江苏法尔胜光电科技有限公司 | Class rectangle panda type polarization-preserving fiber |
| CN110304821A (en) * | 2019-07-16 | 2019-10-08 | 成都中住光纤有限公司 | A kind of small diameter fiber and its manufacturing method of low attenuation change |
| CN112904475A (en) * | 2021-01-29 | 2021-06-04 | 长飞光纤光缆股份有限公司 | Single-mode sensing optical fiber and application thereof |
| CN114280720A (en) * | 2021-12-28 | 2022-04-05 | 长飞光纤光缆股份有限公司 | Optical fiber, coating and optical signal sensing system |
| CN114280720B (en) * | 2021-12-28 | 2023-03-10 | 长飞光纤光缆股份有限公司 | Optical fiber and optical signal sensing system |
| CN114035266A (en) * | 2022-01-10 | 2022-02-11 | 中天科技光纤有限公司 | Small-diameter optical fiber and preparation method thereof |
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| CN103472531B (en) | 2015-11-18 |
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Address after: 430073 Hubei city of Wuhan province Wuchang two Guanshan Road No. four Applicant after: Yangtze Optical Fibre and Cable Co., Ltd Address before: 430073 Hubei city of Wuhan province Wuchang two Guanshan Road No. four Applicant before: Changfei Fibre-Optical & Optical Cable Co., Ltd. |
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