CN101726792B - High-temperature resistant optical fiber and method for manufacturing same - Google Patents
High-temperature resistant optical fiber and method for manufacturing same Download PDFInfo
- Publication number
- CN101726792B CN101726792B CN2009102732624A CN200910273262A CN101726792B CN 101726792 B CN101726792 B CN 101726792B CN 2009102732624 A CN2009102732624 A CN 2009102732624A CN 200910273262 A CN200910273262 A CN 200910273262A CN 101726792 B CN101726792 B CN 101726792B
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- coating
- temperature
- polyimide
- precuring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention relates to high-temperature resistant optical fiber and a method for manufacturing the same and belongs to the technical field of special optical fiber communication and high-power laser communication and sensing. The high-temperature resistant optical fiber comprises optical fiber and a coating coated on the outer surface of the optical fiber, wherein the coating is the polyimide coating of which the single-sided thickness is 5 to 25mum, the Young modulus of the cured polyimide coating is equal to or more than 2GPa, the glassy state transition temperature is equal to or more than 300 DEG C, and the range of refractive index is 1.38 to 1.78; and the polyimide coating if formed by dipping the solution of polyimide on the outer surface of the optical fiber, and then heating the fiber to cure the solution of the polyimide, and the whole process comprises pre-coating, pre-curing and secondary coating. The high-temperature resistant optical fiber can be used at a high temperature and under severe working conditions; and when the high-temperature resistant optical fiber is used for a long time, the temperature reaches 300 DEG C, the operational performance is stable, and good persistence is kept. The high-temperature resistant optical fiber product, manufactured by the method, possesses a screening strength of 100kpsi and a segment length of 4km, even 6km.
Description
Technical field
The present invention relates to a kind of high-temperature resistant optical fiber and manufacture method thereof for special optical fiber communication, high power laser light transmission and field of sensing technologies.
Background technology
Along with the development of optical fiber technology, the range of application of optical fiber has extended to various high-temperature severe environment system.These system requirements optical fiber still keep good characteristic in rugged surroundings, this has proposed the requirement of very high optics, machinery, environmental stability and reliability to optical fiber.Coating material meeting serious aging even inefficacy when the optical fiber of the ultra-violet curing polyacrylate coating of existing routine surpasses 85 ℃ in temperature; show as coating color jaundice, blackening; mechanical property reduction is until lose protective effect to optical fiber; easily cause the optical fiber natural fracture, can't satisfy the reliability requirement of Optical Fiber Transmission under the hot environment.Chinese patent CN200620128456.7 discloses a kind of high-temperature resistant optical fiber, but this patent is not specifically introduced coating structure and the performance of this optical fiber and the method for making this optical fiber.
Summary of the invention
Technical matters to be solved by this invention is the deficiency that exists for above-mentioned prior art and a kind of high-temperature resistant optical fiber and manufacture method thereof with good high temperature resistant property and stability of characteristics is provided.
The technical scheme of high-temperature resistant optical fiber provided by the invention is: comprise optical fiber and the coating that is coated on the optical fiber outside surface, described optical fiber forms by the quartz glass sandwich layer with around the quartz glass covering of sandwich layer, its difference is that the coating in quartz glass covering outer cladding is polyimide coating, the monolateral thickness of described polyimide coating is 5～25 μ m, polyimide coating Young modulus after this curing is equal to or greater than 2GPa, its glass transition temperature is equal to or higher than 300 ℃, and ranges of indices of refraction is 1.38 to 1.78; Described polyimide is the aromatic heterocycle polymer compound that contains the imide chain link; Described polyimide coating is formed through being heating and curing by polyimide solution in the dip-coating of optical fiber outside surface.
Press such scheme, be less than or equal to the optical fiber of 220 μ m for quartz glass surrounding layer diameter, the monolateral thickness of polyimide coating is 8% to 11% of surrounding layer diameter; For the optical fiber of quartz glass surrounding layer diameter more than or equal to 330 μ m, the monolateral thickness of polyimide coating is 4% to 6% of surrounding layer diameter.
Press such scheme, described optical fiber is the sensing high-temperature resistant optical fiber, and its quartz glass surrounding layer diameter is 125 μ m, and the monolateral thickness of polyimide coating is 15 μ m, this optical fiber at 850nm window attenuation coefficient less than 3.5dB/km, at 1300nm window attenuation coefficient less than 1.5dB/km.
Press such scheme, described optical fiber is used high-temperature resistant optical fiber for as seen transmitting to infrared band, its quartz glass surrounding layer diameter is 220 μ m, 440 μ m or 660 μ m etc., the corresponding monolateral thickness of polyimide coating is 15 μ m, 15 μ m or 25 μ m etc., this optical fiber is less than or equal to 10dB/km at 850nm window attenuation coefficient, is less than or equal to 10dB/km at 1064nm window attenuation coefficient.
Press such scheme, described optical fiber is that ultraviolet is to visible waveband transmission high-temperature resistant optical fiber, its quartz glass cladding diameter is 220 μ m, 440 μ m or 660 μ m etc., corresponding polyimide coating thickness is 15 μ m, 15 μ m or 25 μ m etc., this optical fiber at 300nm window attenuation coefficient less than 200dB/km, at 800nm window attenuation coefficient less than 10dB/km.
The technical scheme of high-temperature resistant optical fiber manufacture method of the present invention is:
Preform behind the cleaning-drying is drawn fibroblast at wire-drawing frame, comprise that the prefabricated rods melting reels off raw silk from cocoons, surface coating is processed, receive around; Described surface coating is treated to polyimide coating and processes, and comprises that precoating, precuring and secondary apply; Described melt drawing is by the prefabricated rods feeding mechanism prefabricated rods to be sent in the high-temperature electric smelting furnace to heat, and prefabricated rods feeding rate scope control is at 0.03 ~ 15mm/min; The temperature controlling range of high temperature furnace work is 1700 ~ 2400 ℃, and an end of prefabricated rods forms a pyrometric cone under gravity and capillary effect after the melting of high-temperature region, and the cone tip becomes optical fiber through drawing mechanism's drawbar extension; The scope control of draw rate is at 2m/min ~ 20m/min, and representative value is 4m/min.
Described precoating is that out optical fiber enters the precoating device after passing through an external diameter monitoring means from high temperature furnace, this device comprises storage bottle and with the coating cup of sharp mouth, be filled with the high pressure clean gas in the storage bottle, with air pressure the coating solution of storage bottle is got into coating cup, so that polyimide solution keeps suitable pressure in coating cup, the polyimide solution range of viscosities is 1000cps to 10000cps, typical range of viscosities is 5000cps to 10000cps, optical fiber enters the rubber tip mouth that coating cup passes the bottom afterwards, so that the uniform coating solution of optical fiber surface dip-coating last layer.
Described precuring is the device that the optical fiber of coating solution passes precuring, the precuring device is the cylindrical shape electric furnace of vertically placing, the columniform high-temperature region of electric furnace inner chamber is the precuring passage, the precuring channel diameter is 20 to 28mm, the high-temperature region is divided into two zones, one is the solvent evaporates district, temperature range is 100 ℃ ~ 240 ℃, another is the molecule synthesis district, temperature is 240 ℃ ~ 460 ℃, uniform speed slow is by the high-temperature region under the traction of mechanism in receipts for optical fiber, and optical fiber was 10 to 30 seconds by the time in electric furnace high-temperature district.
Described precoating and precuring operation (repetition) capable of circulation 1～3 time.
Precoating and precuring operation form uniform polyimide coating layer at the optical fiber outside surface, are undercoat, the thickness of undercoat account for final coating thickness half or more than, Young modulus is equal to or greater than 2GPa, glass transition temperature is equal to or higher than 300 ℃.
It is that the optical fiber through precoating and precuring is carried out secondary coating and curing again that described secondary applies, entering horizontal chamber type electric resistance furnace through the optical fiber of precuring through guide wheel group is cured, " V " type trench bottom of guide wheel is lined with the liner that is impregnated with polyimide solution, meeting dip-coating last layer dope layer as thin as a wafer when this guide wheel group of optical fiber process, optical fiber enters cabinet-type electric furnace and is cured receiving under the traction of wheel subsequently, the high-temperature region of cabinet-type electric furnace is divided into two zones, one is the solvent evaporates district, the temperature range in this district is 120 ℃ ~ 300 ℃, finishes the volatilization process of solvent; Another is the molecule synthesis district, and the temperature in this district is 300 ℃ ~ 500 ℃, finishes the micromolecular polymerization process of solute.
Secondary applies and can carry out 1 to 6 time, with the curing quality that improves coating and control suitable coating thickness, reaches enhancing and toughening effect to optical fiber.
Secondary applies and by the two at cabinet-type electric furnace two groups of guide wheel group is set, the optical fiber that makes curing is returned by the guiding of the second guide wheel group and enters cabinet-type electric furnace after the first guide wheel group applies again and be cured, wherein " V " type trench bottom of the first guide wheel group guide wheel is lined with the liner that is impregnated with polyimide solution, the second guide wheel group V-type trench bottom liner does not flood coating solution, only play channeling direction, optical fiber returns the first guide wheel group from the periphery that the second guide wheel group is passed cabinet-type electric furnace, repeat again the process that above-mentioned guide wheel coating and cabinet-type electric furnace solidify, so repeated multiple times coating of circulation-solidify to form final high-temperature resistant optical fiber product can have at most 6 cyclic processes.
It is 1000cps to 10000cps that secondary applies used coating solution range of viscosities, and typical range of viscosities is 1000cps to 7000cps.
Forming the outer polyimide coating layer of optical fiber undercoat after secondary applies and solidifies is external coating.The top layer material Young modulus is equal to or greater than 2GPa, and representative value is not less than 4GPa, and namely external coating modular ratio internal coating is high, is that higher Young modulus helps to improve the Mechanical Reliability of optical fiber because external coating is used for the effect bear extraneous applied environment.The glass transition temperature of external coating is equal to or higher than 300 ℃, and typical transition temperature is higher than 350 ℃, and external coating thickness is 1/3 to 1/2 of polyimide coating gross thickness, and take HTG50/125/155 optical fiber as example, the thickness of external coating is 5 μ m to 7.5 μ m.The key factor that affects thickness is drawing speed, the set time of solution viscosity, optical fiber.
In the exit of the electric furnace inner chamber lower end of precuring and/or secondary apply the cabinet-type electric furnace endpiece that solidifies and be provided with exhausting system, the exhausting amount is 30 ~ 50L/min.The effect of exhausting is that the solvent molecule of in time getting rid of in the precuring passage promotes curing reaction, and has avoided the waste gas of curing process generation to the pollution of indoor environment.
Described receipts enter at last to receive and carry out take-up around mechanism around being after the high-temperature resistant optical fiber that the secondary coating processes is made passes through second external diameter monitoring means, and one time take-up length can reach 4km even 6km.Take-up is to be not less than on the wire winding tube of 400mm around diameter receiving than the optical fiber of big-length, and the rotating speed of this wire winding tube is by the elaborate servo Electric Machine Control of computer control, and rotating speed is associated with first external diameter monitoring means, with the diameter of control optical fiber quartz glass covering.The effect of second external diameter monitoring means is the coating physical dimension of monitoring fiber products, does not play control action.
The present invention for the manufacture of the specialized equipment technical scheme of high-temperature resistant optical fiber is:
Include melt drawing device and receipts around mechanism, install precoating device and precuring device at melt drawing device and receipts around mechanism, precoating device and precuring device arrange 1～3 cover, alternately be connected in series, install secondary and apply solidification equipment after precoating device and precuring device, the output terminal that secondary applies solidification equipment is connected around mechanism with receipts.
Press such scheme, described precoating device forms by the storage bottle that polyimide solution is housed with the coating cup of sharp mouth, is filled with the high pressure clean gas in the storage bottle, with air pressure the coating solution of storage bottle is got into coating cup.
Press such scheme, described precuring device is the cylindrical shape electric furnace of vertically placing, the columniform high-temperature region of electric furnace inner chamber is the precuring passage, the high-temperature region is divided into two zones, one is the solvent evaporates district, temperature range is 100 ℃ ~ 240 ℃, and another is the molecule synthesis district, and temperature is 240 ℃ ~ 460 ℃.
Press such scheme, described secondary applies solidification equipment and comprises the cabinet-type electric furnace that level is installed, correspondence arranges two groups of guide wheel group at box circuit two, the guide wheel number of two groups of guide wheel group is identical, it is 1～6, wherein " V " type trench bottom of the first guide wheel group guide wheel is lined with the liner that is impregnated with polyimide solution, be installed in the upstream end of cabinet-type electric furnace, the second guide wheel group is installed in the endpiece of cabinet-type electric furnace, the upper end of the corresponding two of cabinet-type electric furnace each guide wheel of guide wheel group tangentially arranges solidifying channel, and the lower end of two each guide wheel of guide wheel group is tangentially corresponding to the outer side-lower of cabinet-type electric furnace.
Press such scheme, in the exit of the electric furnace inner chamber lower end of precuring and/or secondary apply the cabinet-type electric furnace endpiece that solidifies and be provided with extractor fan, the exhausting amount is 30 ~ 50L/min.
The beneficial effect that the present invention obtains is:
1. the polyimide of specific thicknesses of the present invention is made the high-temperature resistant optical fiber that coat consists of and is comprised high temperature resistant telecommunication optical fiber, energy transmission optical fibre, sensor fibre etc., can be used for high temperature and abominable working environment, long-term serviceability temperature can be up to 300 ℃, and the optical fiber that has overcome the polyacrylate coatings of conventional ultra-violet curing explained hereafter can't tolerate the weak point of abominable working environment.And operating characteristic is stable, still keeps good persistence in rugged surroundings.
2. high-temperature resistant optical fiber manufacture method of the present invention can accurately be controlled diameter and the fibre coating diameter of optical fiber quartz glass covering, guarantee cladding diameter deviation be no more than ± 2%, the coating diameter deviation is no more than ± 3%.Utilize the produced high-temperature resistant optical fiber product of the inventive method to have the proof strength of 100kpsi, the product segment length can reach 4km even 6km.
Description of drawings
Fig. 1 is precoating inflammatory blepharoedema cut-open view in the one embodiment of the invention.
Fig. 2 is precuring stove diagrammatic cross-section in the one embodiment of the invention.
Fig. 3 is the schematic diagram of box circuit solidifying channel in the regelate.
Fig. 4 is high-temperature resistant optical fiber specialized equipment schematic diagram of the present invention.
Embodiment
The present invention is described in further detail below by way of embodiments and drawings.
Various high-temperature resistant optical fibers among the present invention all are to adopt precoating to add the technique preparation that secondary applies.The key of technique is the temperature setting of precuring stove and cabinet-type electric furnace and the temperature setting of prefabricated rods electric smelter.The below further specifies embodiments of the invention.
The 1st embodiment: fiber type is HT50/55/65, is a kind of ultraviolet transmission optical fiber.Diameter is that prefabricated rods molten contracting drawbar extension in 2180 ℃ high temperature thermal field of 21mm forms light transmitting fiber, under the haulage speed of 12m/min, forms the optical fiber finished product after the coating polyimide coating.This optical fiber quartz glass cladding diameter is 55 μ m, and the polyimide coating diameter is 65 μ m, and the monolateral thickness of coating is 5 μ m.The coating solution viscosity of undercoat is 5500cps, and be 5 seconds set time, and the temperature setting of precuring electric furnace high-temperature district is respectively 230 ℃ in solvent evaporates district, 375 ℃ in molecule synthesis district.Undercoat Young modulus after the curing is 2.2GPa, and glass transition temperature is 330 ℃, and refractive index is 1.5, and monolateral thickness is 2.5 μ m.The outer coating paint solution viscosity is 1500cps, and the temperature setting of regelate electric furnace high-temperature district is respectively 270 ℃ in solvent evaporates district, 400 ℃ in molecule synthesis district.External coating Young modulus after the curing is 4.5GPa, and glass transition temperature is 350 ℃, and monolateral thickness is 2.5 μ m.This optical fiber is 1.2dB/m at 200nm window attenuation coefficient, is 180dB/km at 300nm window attenuation coefficient.
The 2nd embodiment: fiber type is HT9/125/155, is the high temperature resistant single-mode fiber of a kind of communication.Diameter is that prefabricated rods molten contracting drawbar extension in 2100 ℃ high temperature thermal field of 44mm forms light transmitting fiber, under the haulage speed of 10m/min, forms the optical fiber finished product after the coating polyimide coating.This optical fiber quartz glass cladding diameter is 125 μ m, and the polyimide coating diameter is 155 μ m, and the monolateral thickness of coating is 15 μ m.The bottom coating solution viscosity is 5100cps, and be 6 seconds set time, and the temperature setting of precuring electric furnace high-temperature district is respectively 235 ℃ in solvent evaporates district, 380 ℃ in molecule synthesis district.Undercoat Young modulus after the curing is 2.5GPa, and glass transition temperature is 315 ℃, and refractive index is 1.54, and monolateral thickness is 7.5 μ m.The outer coating paint solution viscosity is 2000cps, and the temperature setting of regelate electric furnace high-temperature district is respectively 230 ℃ in solvent evaporates district, 390 ℃ in molecule synthesis district.External coating Young modulus after the curing is 7.5GPa, and glass transition temperature is 370 ℃, and monolateral thickness is 7.5 μ m.This optical fiber is 0.6dB/km at 1310nm window attenuation coefficient, is 0.5dB/km at 1550nm window attenuation coefficient.
The 3rd embodiment: fiber type is HTG50/125/155, is the high temperature resistant multimode optical fiber of a kind of sensing.Diameter is that prefabricated rods molten contracting drawbar extension in 2150 ℃ high temperature thermal field of 40mm forms light transmitting fiber, under the haulage speed of 8m/min, forms the optical fiber finished product after the coating polyimide coating.This optical fiber quartz glass cladding diameter is 125 μ m, and the polyimide coating diameter is 155 μ m, and the monolateral thickness of coating is 15 μ m.The bottom coating solution viscosity is 7000cps, and be 8 seconds set time, and the temperature setting of precuring electric furnace high-temperature district is respectively 240 ℃ in solvent evaporates district, 410 ℃ in molecule synthesis district.Undercoat Young modulus after the curing is 2.3GPa, and glass transition temperature is 355 ℃, and refractive index is 1.6, and monolateral thickness is 10 μ m.The outer coating paint solution viscosity is 1200cps, and the temperature setting of regelate electric furnace high-temperature district is respectively 260 ℃ in solvent evaporates district, 410 ℃ in molecule synthesis district.External coating Young modulus after the curing is 4.5GPa, and glass transition temperature is 370 ℃, and monolateral thickness is 5 μ m.This optical fiber is 2.6dB/km at 850nm window attenuation coefficient, is 0.8dB/km at 1300nm window attenuation coefficient.
The 4th embodiment: fiber type is HT400/440/470, is a kind of laser transmission fiber.Diameter is that prefabricated rods molten contracting drawbar extension in 2200 ℃ high temperature thermal field of 21mm forms light transmitting fiber, under the haulage speed of 5m/min, forms the optical fiber finished product after the coating polyimide coating.This optical fiber quartz glass cladding diameter is 440 μ m, and the polyimide coating diameter is 470 μ m, and the monolateral thickness of coating is 15 μ m.The bottom coating solution viscosity is 6300cps, and be 12 seconds set time, and the temperature setting of precuring electric furnace high-temperature district is respectively 227 ℃ in solvent evaporates district, 445 ℃ in molecule synthesis district.Undercoat Young modulus after the curing is 3.4GPa, and glass transition temperature is 405 ℃, and refractive index is 1.45, and monolateral thickness is 10 μ m.The outer coating paint solution viscosity is 3400cps, and the temperature setting of regelate electric furnace high-temperature district is respectively 290 ℃ in solvent evaporates district, 435 ℃ in molecule synthesis district.External coating Young modulus after the curing is 6.0GPa, and glass transition temperature is 410 ℃, and monolateral thickness is 5 μ m.This optical fiber is 180dB/km at 300nm window attenuation coefficient, is 8dB/km at 800nm window attenuation coefficient.
In the 5th embodiment, fiber type is HT600/660/710, is a kind of high damage thresholding laser transmission fiber.Diameter is that prefabricated rods molten contracting drawbar extension in 2200 ℃ high temperature thermal field of 22mm forms light transmitting fiber, under the haulage speed of 4m/min, forms the optical fiber finished product after the coating polyimide coating.This optical fiber quartz glass cladding diameter is 660 μ m, and the polyimide coating diameter is 710 μ m, and the monolateral thickness of coating is 25 μ m.The bottom coating solution viscosity is 5700cps, and be 15 seconds set time, and the temperature setting of precuring electric furnace high-temperature district is respectively 210 ℃ in solvent evaporates district, 425 ℃ in molecule synthesis district.Undercoat Young modulus after the curing is 3.3GPa, and glass transition temperature is 335 ℃, and refractive index is 1.42, and thickness is 15 μ m.The outer coating paint solution viscosity is 5300cps, and the temperature setting of regelate electric furnace high-temperature district is respectively 270 ℃ in solvent evaporates district, 490 ℃ in molecule synthesis district.External coating Young modulus after the curing is 11GPa, and glass transition temperature is 400 ℃, and monolateral thickness is 10 μ m.This optical fiber is 10dB/km at 850nm window attenuation coefficient, is 9.8dB/km at 1064nm window attenuation coefficient.
In the 6th embodiment, fiber type is HT1000/1100/1180, is a kind of as seen to Infrared Transmission optical fiber.Diameter is that prefabricated rods molten contracting drawbar extension in 2250 ℃ high temperature thermal field of 26mm forms light transmitting fiber, under the haulage speed of 2m/min, forms the optical fiber finished product after the coating polyimide coating.This optical fiber quartz glass cladding diameter is 1100 μ m, and the polyimide coating diameter is 1180 μ m, and the monolateral thickness of coating is 40 μ m.The bottom coating solution viscosity is 8900cps, and be 30 seconds set time, and the temperature setting of precuring electric furnace high-temperature district is respectively 225 ℃ in solvent evaporates district, 410 ℃ in molecule synthesis district.Undercoat Young modulus after the curing is 2.1GPa, and glass transition temperature is 380 ℃, and refractive index is 1.7, and monolateral thickness is 20 μ m.The outer coating paint solution viscosity is 5300cps, and the temperature setting of regelate electric furnace high-temperature district is respectively 295 ℃ in solvent evaporates district, 460 ℃ in molecule synthesis district.External coating Young modulus after the curing is 4.1GPa, and glass transition temperature is 400 ℃, and monolateral thickness is 20 μ m.This optical fiber is 25dB/km at 470nm window attenuation coefficient, is 10dB/km at 630nm window attenuation coefficient.
The embodiment of present device as shown in drawings, quartz glass optical fiber 1 enters precuring device 6 and carries out precuring after precoating inflammatory blepharoedema 3, such precoating and precuring device can be installed 3 groups, only list 1 group in the schematic diagram of simplification.The precoating device forms by the storage bottle that polyimide solution is housed with the coating cup 3 of rubber tip mouth 4, be filled with the high pressure clean gas in the storage bottle, with air pressure the coating solution 2 of storage bottle is got into coating cup, optical fiber passes through the rubber tip mouth of precoating inflammatory blepharoedema at the bottom of the precoating inflammatory blepharoedema and enters precuring device 6, the precuring device is the cylindrical shape electric furnace of vertically placing, the columniform high-temperature region of electric furnace inner chamber is the precuring passage, the high-temperature region is divided into two zones, one is solvent evaporates district 7, temperature range is 100 ℃～240 ℃, another is molecule synthesis district 5, and temperature is 240 ℃～460 ℃.Optical fiber is through precoating, precuring applies curing by entering secondary by guide wheel 12 guiding, secondary applies solidification equipment and comprises the cabinet-type electric furnace 9 that level is installed, in cabinet-type electric furnace two correspondence two groups of guide wheel group are set, the guide wheel number of two groups of guide wheel group is identical, it is 1～6, wherein " V " type trench bottom of the first guide wheel group 13 guide wheels is lined with the liner that is impregnated with polyimide solution, be installed in the upstream end of cabinet-type electric furnace, the second guide wheel group 11 is installed in the endpiece of cabinet-type electric furnace, the upper end of the corresponding two of cabinet-type electric furnace each guide wheel of guide wheel group tangentially arranges solidifying channel 8, and the lower end of two each guide wheel of guide wheel group is tangentially corresponding to the outer side-lower of cabinet-type electric furnace.Thin layer coating is laggard in 13 dip-coatings of the first guide wheel group enters box curing oven 9 and carries out regelate, returns the first guide wheel group by 11 guiding of the second guide wheel group again and repeats secondary and apply and the regelate process.Because guide wheel group is comprised of 6 concentric guide wheels with independent rotation respectively, the process that optical fiber solidifies through the guide wheel group guiding can have at most 6 times.Optical fiber finished product after 6 curing is received on the optical fibre winding cylinder by receiving around mechanism 10.In the exit of the electric furnace inner chamber lower end of precuring and/or secondary apply the cabinet-type electric furnace endpiece that solidifies and be provided with extractor fan, the exhausting amount is 30～50L/min.
Claims (3)
1. the manufacture method of a high-temperature resistant optical fiber draws fibroblast with the preform behind the cleaning-drying at wire-drawing frame, comprises that the prefabricated rods melting reels off raw silk from cocoons, and surface coating is processed, receive around; It is characterized in that described high-temperature resistant optical fiber comprises optical fiber and the coating that is coated on the optical fiber outside surface, described optical fiber forms by the quartz glass sandwich layer with around the quartz glass covering of sandwich layer, coating in quartz glass covering outer cladding is polyimide coating, the monolateral thickness of described polyimide coating is 5～25 μ m, polyimide coating Young modulus after this curing is equal to or greater than 2GPa, its glass transition temperature is equal to or higher than 300 ℃, and ranges of indices of refraction is 1.38 to 1.78; Described polyimide is the aromatic heterocycle polymer compound that contains the imide chain link; Described polyimide coating is formed through being heating and curing by polyimide solution in the dip-coating of optical fiber outside surface; Described surface coating is treated to polyimide coating and processes, and comprises that precoating, precuring and secondary apply; Described melt drawing is by the prefabricated rods feeding mechanism prefabricated rods to be sent in the high-temperature electric smelting furnace to heat, and prefabricated rods feeding rate scope control is at 0.03～15mm/min; The temperature controlling range of high temperature furnace work is 1700～2400 ℃, and an end of prefabricated rods forms a pyrometric cone under gravity and capillary effect after the melting of high-temperature region, and the cone tip becomes optical fiber through drawing mechanism's drawbar extension; The scope control of draw rate is at 2m/min～20m/min; Described precoating is that out optical fiber enters the precoating device after passing through an external diameter monitoring means from high temperature furnace, this device comprises storage bottle and with the coating cup of sharp mouth, be filled with the high pressure clean gas in the storage bottle, with air pressure the coating solution of storage bottle is got into coating cup, so that polyimide solution keeps suitable pressure in coating cup, the polyimide solution range of viscosities is 1000cps to 10000cps, optical fiber enters the rubber tip mouth that coating cup passes the bottom afterwards, so that the uniform coating solution of optical fiber surface dip-coating last layer; Described precuring is that the optical fiber of coating solution is through the device of precuring, the precuring device is the cylindrical shape electric furnace of vertically placing, the columniform high-temperature region of electric furnace inner chamber is the precuring passage, the high-temperature region is divided into two zones, and one is the solvent evaporates district, and temperature range is 100 ℃～240 ℃, another is the molecule synthesis district, temperature is 240 ℃～460 ℃, and uniform speed slow is by the high-temperature region under the traction of mechanism in receipts for optical fiber, and optical fiber was 10 to 30 seconds by the time in electric furnace high-temperature district; Described precoating and the circulation of precuring operation 1～3 time; And precoating and precuring operation form uniform polyimide coating layer at the optical fiber outside surface, are undercoat, the thickness of undercoat account for final coating thickness half or more than, Young modulus is equal to or greater than 2GPa, glass transition temperature is equal to or higher than 300 ℃; It is that the optical fiber through precoating and precuring is carried out secondary coating and curing again that described secondary applies, entering horizontal chamber type electric resistance furnace through the optical fiber of precuring through guide wheel group is cured, " V " type trench bottom of guide wheel is lined with the liner that is impregnated with polyimide solution, meeting dip-coating last layer dope layer as thin as a wafer when this guide wheel group of optical fiber process, optical fiber enters cabinet-type electric furnace and is cured receiving under the traction of wheel subsequently, the high-temperature region of cabinet-type electric furnace is divided into two zones, one is the solvent evaporates district, the temperature range in this district is 120 ℃～300 ℃, finishes the volatilization process of solvent; Another is the molecule synthesis district, and the temperature in this district is 300 ℃～500 ℃, finishes the micromolecular polymerization process of solute; Secondary applies and carries out 1 to 6 time.
2. press the manufacture method of high-temperature resistant optical fiber claimed in claim 1, it is characterized in that it is 1000cps to 10000cps that secondary applies used coating solution range of viscosities, after applying and solidify, secondary forms the outer polyimide coating layer of optical fiber undercoat, be called external coating, external coating modular ratio internal coating is high, the glass transition temperature of external coating is equal to or higher than 300 ℃, and external coating thickness is 1/3 to 1/2 of polyimide coating gross thickness.
3. by the manufacture method of high-temperature resistant optical fiber claimed in claim 1, it is characterized in that being less than or equal to for quartz glass surrounding layer diameter the optical fiber of 220 μ m, the monolateral thickness of polyimide coating is 8% to 11% of surrounding layer diameter; For the optical fiber of quartz glass surrounding layer diameter more than or equal to 330 μ m, the monolateral thickness of polyimide coating is 4% to 6% of surrounding layer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102732624A CN101726792B (en) | 2009-12-15 | 2009-12-15 | High-temperature resistant optical fiber and method for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102732624A CN101726792B (en) | 2009-12-15 | 2009-12-15 | High-temperature resistant optical fiber and method for manufacturing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101726792A CN101726792A (en) | 2010-06-09 |
| CN101726792B true CN101726792B (en) | 2013-02-13 |
Family
ID=42447927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102732624A Active CN101726792B (en) | 2009-12-15 | 2009-12-15 | High-temperature resistant optical fiber and method for manufacturing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101726792B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109634A (en) * | 2010-12-27 | 2011-06-29 | 富通集团有限公司 | Silica optical fiber with large core diameter for illumination and energy transmission |
| CN102360096A (en) * | 2011-10-10 | 2012-02-22 | 中天科技光纤有限公司 | High temperature resistant fiber and processing technology thereof |
| CN103295700B (en) * | 2013-04-27 | 2016-03-02 | 宁波隆达电子科技有限公司 | Electric cable core wire coating unit |
| CN103496857B (en) * | 2013-09-23 | 2015-10-28 | 宁波大学 | A kind of method forming polymer protective layer on chalcogenide glass fiber prefabricated rods surface |
| CN103869438A (en) * | 2014-03-31 | 2014-06-18 | 江苏科信光电科技有限公司 | High-temperature FTTH drop cable and manufacturing technology thereof |
| 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 |
| CN103992491B (en) * | 2014-05-23 | 2017-06-06 | 西安交通大学 | A kind of processing method and processing device of enhancing PI coated optical fibers and epoxy resin interface |
| CN106476305B (en) * | 2016-12-22 | 2019-03-05 | 苏州振瑞昌材料科技有限公司 | A kind of strengthening core Preparation equipment |
| CN111153597A (en) * | 2019-12-26 | 2020-05-15 | 中天科技光纤有限公司 | Optical fiber |
| CN113292256B (en) * | 2021-06-18 | 2024-01-09 | 江苏华能电缆股份有限公司 | Polyimide coating process for resisting high temperature and hydrogen loss on surface of optical fiber |
| 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 |
| CN114808437A (en) * | 2022-05-18 | 2022-07-29 | 四川华智纤维有限公司 | Method for surface treatment of polymer yarns |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5367046A (en) * | 1992-04-10 | 1994-11-22 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Low dielectric polyimide fibers |
| US6855422B2 (en) * | 2000-09-21 | 2005-02-15 | Monte C. Magill | Multi-component fibers having enhanced reversible thermal properties and methods of manufacturing thereof |
| CN200986600Y (en) * | 2006-12-20 | 2007-12-05 | 李高社 | High temperature resistant optical fiber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008141066A (en) * | 2006-12-04 | 2008-06-19 | Hitachi Cable Ltd | Optical fiber for fiber laser device, and fiber laser device |
-
2009
- 2009-12-15 CN CN2009102732624A patent/CN101726792B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5367046A (en) * | 1992-04-10 | 1994-11-22 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Low dielectric polyimide fibers |
| US6855422B2 (en) * | 2000-09-21 | 2005-02-15 | Monte C. Magill | Multi-component fibers having enhanced reversible thermal properties and methods of manufacturing thereof |
| CN200986600Y (en) * | 2006-12-20 | 2007-12-05 | 李高社 | High temperature resistant optical fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101726792A (en) | 2010-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101726792B (en) | High-temperature resistant optical fiber and method for manufacturing same | |
| CN104661975B (en) | Methods for optical fiber manufacture | |
| CN103941331A (en) | Polyimide coated optical fiber and machining process thereof | |
| CN103193398B (en) | A kind of preparation method of high-speed wire-drawing formed high-temperature resistant optical fiber | |
| CN101767930B (en) | High-speed wire drawing device for optical fiber production process and high-speed wire drawing method thereof | |
| CN103282809A (en) | Multi-core optical fiber ribbons and methods for making the same | |
| CN102503116B (en) | Method for manufacturing rotary optical fiber and rotary fiber winding device | |
| CN101852886A (en) | High anti-damage energy transfer optical fiber and manufacturing method | |
| CN102442774B (en) | Method for manufacturing ultra-low birefringence optical fibre and rotary stretching tower | |
| CN105158843A (en) | Thin-diameter bending-resistant optical fiber and preparation method thereof | |
| CN108609844A (en) | A kind of optic fibre manufacture process that loss is smaller | |
| CN106932874A (en) | The preparation method of filling type optical cable | |
| CN201713432U (en) | High-speed fiber drawing equipment during fiber production process | |
| US9416045B2 (en) | Method of manufacturing preforms for optical fibres having low water peak | |
| CN203849452U (en) | Polyimide-coated optical fiber | |
| CN109956665A (en) | A kind of manufacture craft of optical fiber cable | |
| CN103951286B (en) | A kind of equipment manufacturing polyimide coated optical fiber | |
| CN109212696A (en) | Coal mine low smoke and zero halogen Plastic-sheathed Cable high-temperature resistant optical fiber and its manufacturing method | |
| CN103323906A (en) | High-temperature-resisting optical fiber | |
| CN103764580B (en) | The method for preparation with the optical fiber of controlled index disturbance | |
| CN104402212B (en) | Optical fiber prefabricated component | |
| CN210656694U (en) | Low-loss optical fiber drawing system | |
| WO2021128213A1 (en) | Optical fiber and forming method therefor | |
| CN203350478U (en) | High temperature resistant fiber | |
| CN103278881B (en) | A kind of manufacturing process of high-temperature resistant optical fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: YANGTZE OPTICAL FIBRE AND CABLE CO., LTD Free format text: FORMER NAME: CHANGFEI FIBRE-OPTICAL + OPTICAL CABLE CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 430073 Hubei city of Wuhan province Wuchang two Guanshan Road No. four Patentee after: Yangtze Optical Fibre and Cable Co., Ltd Address before: 430073 Hubei city of Wuhan province Wuchang two Guanshan Road No. four Patentee before: Changfei Fibre-Optical & Optical Cable Co., Ltd. |