CN104181636B - The flexible infrared chalcogenide glass fiber coherent fiber bundle of high-resolution and preparation method - Google Patents

The flexible infrared chalcogenide glass fiber coherent fiber bundle of high-resolution and preparation method Download PDF

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CN104181636B
CN104181636B CN201410422692.9A CN201410422692A CN104181636B CN 104181636 B CN104181636 B CN 104181636B CN 201410422692 A CN201410422692 A CN 201410422692A CN 104181636 B CN104181636 B CN 104181636B
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optical fiber
chalcogenide glass
preparation
monofilament
resolution
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CN104181636A (en
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张斌
杨志勇
翟诚诚
祁思胜
郭威
任和
张鸣杰
杨安平
唐定远
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Jiangsu Normal University
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Abstract

The invention discloses a kind of flexible infrared chalcogenide glass fiber coherent fiber bundle of high-resolution and preparation method, optical fiber image transmission beam of the present invention is constituted by optical fiber multifilament is tightly packed, optical fiber multifilament is drawn by optical fiber filament tow and formed, optical fiber filament tow is constituted by optical fiber monofilament is tightly packed, optical fiber monofilament is from inside to outside followed successively by chalcogenide glass fibre core, chalcogenide glass inner cladding and thermoplastic polymer surrounding layer, described chalcogenide glass fiber core refractive index n1, chalcogenide glass inner cladding refractive index n2With thermoplastic polymer cladding refractive index n3Between there is relation:n1>n2>n3.Preparation process is simple of the present invention is easy to control, and fibre bundle wire broken rate is low, and easily prepares heavy in section, high-resolution flexible infrared optical fiber coherent fiber bundle.

Description

The flexible infrared chalcogenide glass fiber coherent fiber bundle of high-resolution and preparation method
Technical field
The invention belongs to infrared optical fiber coherent fiber bundle technical field, more particularly to a kind of infrared chalcogenide glass of flexible high-resolution Optical fiber image transmission beam and preparation method.
Background technology
In recent years, infrared chalcogenide glass fiber has excellent infrared transmission performance, good heat endurance and change because of it The advantages of learning stability, prepare simple, low cost and reelability, in Laser Transmission, thermal imagery transmission, chemistry and bio-sensing, red The fields such as external spectrum research receive much concern.Chalcogenide glass refers to based on periodic table Group VIA element S, Se, Te, introduces a certain amount of The amorphous material that other metals or nonmetalloid are formed.In chalcogenide glass fiber, sulfide, selenides and telluride object light Fine typical transmittance spectra scope is respectively 1~6 μm, 2~8 μm and 4~12 μm.Passed with flexible high-resolution chalcogenide glass fiber Video beam is connected as transmission waveguide with infrared imaging detector, is capable of achieving the transmission of high-quality infrared image, substantially reduces system weight Amount and reduction system bulk, significantly reduce infrared system cost, improve systematic function.Can be used to detect strong electromagnetic place, danger Environment, narrow space or in aperture object heat distribution, particularly have in national defence, medical treatment and the field such as industrial detection and weigh very much The application background wanted.
At present, chalcogenide glass fiber coherent fiber bundle is generally prepared using multifilament method and layered manner, multifilament method be prepare monofilament it is thin, The effective ways of the hard coherent fiber bundle of high resolution, but cannot be used for preparing flexible coherent fiber bundle.Layered manner is to prepare heavy in section biography One of effective ways of video beam, due to being limited to wire drawing and screening technique, it is difficult to prepare high resolution in the biography picture of 40lp/mm Beam.It is noted that being not used to prepare for preparing the acid extracting of flexible high-resolution multicomponent glass optical fiber coherent fiber bundle The flexible infrared chalcogenide glass fiber coherent fiber bundle of high-resolution, glass transition temperature on the one hand due to acid soluble glass, thermal expansion The critical physical parameters such as coefficient are mismatched with chalcogenide glass;On the other hand because the mechanical strength of chalcogenide glass fiber is low, in row Wire broken rate is high during silk.At present, the preparation of the infrared chalcogenide glass fiber coherent fiber bundle of flexible high-resolution still needs to overcome many skills Art problem.
The content of the invention
It is difficult to prepare the problem of flexible coherent fiber bundle for multifilament method in the prior art, multifilament is based on the invention provides one kind The infrared chalcogenide glass fiber coherent fiber bundle of flexible high-resolution and preparation method of method.
Thinking of the invention is:
Glass transition temperature thermoplastic polymer identical with chalcogenide glass or close is introduced as chalcogenide glass fiber Surrounding layer, for improving the mechanical strength and toughness of optical fiber monofilament, the wire broken rate during the row's of reduction silk;And by multifilament technique Improve the resolution ratio of optical fiber image transmission beam.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that:
A kind of infrared chalcogenide glass fiber coherent fiber bundle of flexible high-resolution, is constituted by optical fiber multifilament is tightly packed, and optical fiber is multiple Silk is drawn by optical fiber filament tow and formed, and optical fiber filament tow is constituted by optical fiber monofilament is tightly packed, and optical fiber monofilament is from inside to outside successively It is chalcogenide glass fibre core, chalcogenide glass inner cladding and thermoplastic polymer surrounding layer, described chalcogenide glass fiber core refractive index n1、 Chalcogenide glass inner cladding refractive index n2With thermoplastic polymer cladding refractive index n3Between there is relation:n1>n2>n3
Above-mentioned fibre optic image transmission area of beam is square or regular hexagon.
Above-mentioned optical fiber multifilament section is square or regular hexagon.
Preferably, the glass transition temperature of thermoplastic polymer it is higher than the glass transition temperature of chalcogenide glass by 0~ 50 DEG C, thus can at the same temperature realize the common fiber draw of chalcogenide glass and thermoplastic polymer.
Preferably, the component of chalcogenide glass fibre core includes 1 in 1 or 2 kind of element and sulphur, selenium, tellurium in germanium, arsenic, antimony Or 2 kinds of elements.
Preferably, the component of chalcogenide glass inner cladding is including in 1 or 2 kind of element and sulphur, selenium, tellurium in germanium, arsenic, antimony 1 or 2 kind of element.
Preferably, thermoplastic polymer surrounding layer is polysulfone resin surrounding layer, polyethersulfone resin surrounding layer or polyethers acyl Imines surrounding layer.
The preparation method of the above-mentioned infrared chalcogenide glass fiber coherent fiber bundle of flexible high-resolution, including step:
Step 1, three layers of coaxial configuration optical fiber monofilament are tightly packed into optical fiber filament tow, load thermoplastic polymer sleeve pipe Optical fiber monofilament fasces is constituted, three layers of described coaxial configuration optical fiber monofilament are from inside to outside followed successively by chalcogenide glass fibre core, sulphur system glass Glass inner cladding and thermoplastic polymer surrounding layer;
Step 2, optical fiber multifilament is drawn into by optical fiber monofilament fasces;
Step 3, optical fiber multifilament bundled is piled into by optical fiber multifilament;
Optical fiber multifilament bundled two ends are carried out hot gluing and sealed with wax by step 4, then, be put into organic solvent remove it is exposed Thermoplastic polymer, that is, obtain flexible high-resolution optical fiber image transmission bundle.
Above-mentioned three layers of coaxial configuration optical fiber monofilament is adopted and prepared with the following method:
Prepare chalcogenide glass plug, chalcogenide glass inner cladding sleeve pipe and thermoplastic polymer surrounding layer respectively using extrusion Sleeve pipe, and it is assembled into three layers of coaxial configuration preform;
Three layers of coaxial configuration preform are drawn into three layers of coaxial configuration optical fiber monofilament.
Three layers of coaxial configuration optical fiber monofilament are tightly packed into the optical fiber monofilament that section is square or regular hexagon in step 1 Beam.
Optical fiber multifilament is tightly packed into the optical fiber multifilament bundled that section is square or regular hexagon in step 3.
Preferably, the organic solvent described in step 4 is tetrahydrofuran, dichloromethane or dimethylacetylamide.
Optical fiber image transmission beam of the present invention has the characteristics that and beneficial effect:
(1) mechanical strength and toughness of optical fiber monofilament can be greatly improved using thermoplastic polymer surrounding layer, and is significantly dropped Wire broken rate of the low optical fiber monofilament during silk is arranged.
(2) heavy in section, high-resolution infrared image guide can be realized using multifilament and row's silk technique for being combined of stacking Prepare, coherent fiber bundle can as needed draw any required diameter.
(3) minimum filament diameter can be prepared using the present invention<8 μm, optical fiber area of beam>1cm2, fill factor>0.5th, differentiate Rate>The infrared chalcogenide glass fiber coherent fiber bundle of flexible high-resolution of 70lp/mm, 1~12 μm of spectral region.
Compared with existing infrared chalcogenide glass fiber coherent fiber bundle preparation method, the inventive method has the following advantages that:
Fibre bundle wire broken rate is low;Preparation process is simple is easy to control;Easily prepare heavy in section, high-resolution flexible infrared optical fiber Coherent fiber bundle.
Brief description of the drawings
Fig. 1 is three layers of coaxial configuration optical fiber individual filament cross section schematic diagram, in figure, 1- chalcogenide glass fibre cores, in 2- chalcogenide glasses Covering, 3- thermoplastic polymer surrounding layers;
Fig. 2 is optical fiber multifilament cross-sectional view in embodiment 1;
Fig. 3 is the transversal schematic diagram of optical fiber multifilament bundled in embodiment 1.
Specific embodiment
The present invention will now be further described by way of examples, but the scope of the present invention is not limited only to the cited case.
Embodiment 1:The preparation of high-resolution regular hexagon As-S optical fiber image transmission beams
(1) three layer of preparation of coaxial configuration preform
As is prepared using extrusion molding respectively0.4S0.6Chalcogenide glass plug, As0.38S0.62Chalcogenide glass inner cladding sleeve pipe and poly- Ether sulfone resin surrounding layer sleeve pipe, detailed process is as follows:
The mixed material of chalcogenide glass plug and chalcogenide glass inner cladding sleeve pipe is respectively placed in vitreosil pipe, quartz ampoule Internal diameter and external diameter are respectively 40mm and 44mm, and the As of diameter about 40mm is synthesized by conventional melt-chilling method0.4S0.6Chalcogenide glass Rod and As0.38S0.62Chalcogenide glass rod.By As0.4S0.6Chalcogenide glass rod and As0.38S0.62Chalcogenide glass rod is respectively put into extruder Crowded rod and crowded pipe grinding tool in, using extrusion molding obtain chalcogenide glass plug and chalcogenide glass inner cladding sleeve pipe, chalcogenide glass core Rod diameter 16mm, chalcogenide glass inner cladding casing inner diameter and external diameter are respectively 16.1mm and 19mm.
Polyethersulfone resin is made the polyethersulfone resin rod of diameter 40mm, polyethersulfone resin rod is placed in into extruder squeezes pipe mill In tool, polyethersulfone resin surrounding layer sleeve pipe is obtained by extrusion, polyethersulfone resin surrounding layer casing inner diameter and external diameter are respectively 19.1mm and 20mm.
By As0.4S0.6Chalcogenide glass plug, As0.38S0.62Chalcogenide glass inner cladding sleeve pipe and polyethersulfone resin surrounding layer set Pipe is assembled into three layers of coaxial configuration preform.
(2) three layers of preparation of coaxial configuration optical fiber monofilament
Three layers of coaxial configuration preform are drawn into the optical fiber list of 400 μm of diameter on high-accuracy fiber drawing tower Silk, Fig. 1 is optical fiber individual filament cross section schematic diagram, is from inside to outside followed successively by chalcogenide glass fibre core 1, chalcogenide glass inner cladding 2 and polyethers Sulphone resin surrounding layer 3.
(3) preparation of optical fiber multifilament:
Three layers of coaxial configuration optical fiber monofilament cutting are processed into the optical fiber monofilament section of length 50cm, by optical fiber monofilament section closely The optical fiber filament tow that section is regular hexagon is piled into, the optical fiber filament tow is formed by 817 optical fiber monofilament stackings, its section side A length of 6.8mm.Optical fiber filament tow is fitted into the polyethersulfone resin sleeve pipe that section is regular hexagon and forms optical fiber monofilament fasces, gathered Ether sulfone resin sleeve wall thickness 0.5mm, length of side 6.9mm in section.Monofilament fasces is drawn into light on high-accuracy fiber drawing tower Fine multifilament, optical fiber multifilament section is the regular hexagon of 150 μm of the length of side, and optical fiber multifilament schematic cross-section is shown in Fig. 2.Polyethers in this step Sulphone resin sleeve pipe is prepared using the extrusion described in step (1).
(4) preparation of optical fiber image transmission beam:
The cutting of optical fiber multifilament is processed into the optical fiber multifilament section of length 50cm, tightly packed is into section by optical fiber multifilament section The optical fiber multifilament bundled of regular hexagon, the optical fiber multifilament area of beam length of side is 6.5mm.By optical fiber multifilament bundled two ends carry out hot gluing and Seal with wax, the schematic cross-section of optical fiber multifilament bundled is shown in Fig. 3 after gluing is sealed with wax.The optical fiber multifilament bundled that two ends gluing is sealed with wax is put into dichloro In methane solvent, the polyethersulfone resin of sudden and violent leakage is dissolved, that is, obtain flexible high-resolution regular hexagon As-S coherent fiber bundles.
The optical fiber filament diameter that the present embodiment finally obtains in infrared optical fiber coherent fiber bundle is 7.6 μm, fibre optic image transmission area of beam Area is 1.1cm2, fill factor is 0.58, and optical fiber image transmission beam resolution ratio is 71lp/mm, 1~6 μm of spectral region.
Embodiment 2:The preparation of high-resolution square Te-As-Se optical fiber image transmission beams
(1) three layer of preparation of coaxial configuration preform:
Te is prepared using the extrusion molding described in embodiment 1 respectively0.2As0.3Se0.5Chalcogenide glass plug, Te0.16As0.30Se0.54Chalcogenide glass inner cladding sleeve pipe and polysulfone resin surrounding layer sleeve pipe, Te0.2As0.3Se0.5Chalcogenide glass plug Diameter 16mm, Te0.16As0.30Se0.54The straight internal diameter of chalcogenide glass inner cladding sleeve pipe and external diameter are respectively 16.1mm and 19mm, polysulfones Resin surrounding layer casing inner diameter and external diameter are respectively 19.1mm and 20mm.By Te0.2As0.3Se0.5Chalcogenide glass plug, Te0.16As0.30Se0.54Chalcogenide glass inner cladding sleeve pipe and polysulfone resin surrounding layer sleeve-assembled are into three layers of coaxial configuration predispersed fiber Rod processed.
(2) three layers of preparation of coaxial configuration optical fiber monofilament:
Three layers of coaxial configuration preform are drawn into the optical fiber list of 400 μm of diameter on high-accuracy fiber drawing tower Silk, optical fiber monofilament is from inside to outside followed successively by chalcogenide glass fibre core, chalcogenide glass inner cladding and polysulfone resin surrounding layer.
(3) preparation of optical fiber multifilament:
The cutting of optical fiber monofilament is processed into the optical fiber monofilament section of length 50cm, tightly packed is into section by optical fiber monofilament section Foursquare optical fiber filament tow, the optical fiber filament tow is formed by 1024 optical fiber monofilament stackings, and its section length of side is 12.8mm.Will Optical fiber filament tow is fitted into section to form optical fiber monofilament fasces, polysulfone resin casing wall thickness in foursquare polysulfone resin sleeve pipe Length of side 12.9mm in 0.5mm, section.Monofilament fasces is drawn into optical fiber multifilament in high-accuracy fiber drawing tower, optical fiber multifilament cuts Face is the square of 200 μm of the length of side.
(4) preparation of optical fiber image transmission beam:
The cutting of optical fiber multifilament is processed into the optical fiber multifilament section of length 50cm, tightly packed is into section by optical fiber multifilament section Foursquare optical fiber multifilament bundled, the optical fiber multifilament area of beam length of side is 12.8mm.By optical fiber multifilament bundled two ends carry out hot gluing and Seal with wax, the optical fiber multifilament bundled that two ends gluing is sealed with wax is put into dimethylacetamide solvent, dissolve the polysulfone resin of sudden and violent leakage, i.e., Obtain flexible high-resolution square Te-As-Se coherent fiber bundles.
Optical fiber filament diameter is 5.5 μm, fibre optic image transmission area of beam in the infrared optical fiber coherent fiber bundle that the present embodiment is finally obtained Area is 1.6cm2, fill factor is 0.51, and optical fiber image transmission beam resolution ratio is 86lp/mm, 4~12 μm of spectral region.
Embodiment 3:The preparation of flexible high-resolution regular hexagon Ge-Sb-Se optical fiber image transmission beams
(1) three layer of preparation of coaxial configuration preform:
Ge is prepared using the extrusion molding described in embodiment 1 respectively0.13Sb0.17Se0.70Chalcogenide glass plug, Ge0.15Sb0.15Se0.70Chalcogenide glass inner cladding sleeve pipe and PEI surrounding layer sleeve pipe, Ge0.13Sb0.17Se0.70Chalcogenide glass Diameter of mandrel 16mm, Ge0.15Sb0.15Se0.70The internal diameter and external diameter of chalcogenide glass inner cladding sleeve pipe are respectively 16.1mm, 19mm, gather The internal diameter and external diameter of etherimide surrounding layer sleeve pipe are respectively 19.1mm and 20mm.By Ge0.13Sb0.17Se0.70Chalcogenide glass core Rod, Ge0.15Sb0.15Se0.70Chalcogenide glass inner cladding sleeve pipe and PEI surrounding layer sleeve-assembled are into three layers of coaxial configuration light Fine prefabricated rods.
(2) three layers of preparation of coaxial configuration optical fiber monofilament:
Three layers of coaxial configuration preform are drawn into the optical fiber list of 400 μm of diameter on high-accuracy fiber drawing tower Silk, optical fiber monofilament is from inside to outside followed successively by chalcogenide glass fibre core, chalcogenide glass inner cladding and polysulfone resin surrounding layer.
(3) preparation of optical fiber multifilament:
The cutting of optical fiber monofilament is processed into the optical fiber monofilament section of length 50cm, tightly packed is into section by optical fiber monofilament section The optical fiber filament tow of regular hexagon, the optical fiber filament tow is formed by 1657 optical fiber monofilament stackings, and its section length of side is 9.6mm. Optical fiber filament tow is fitted into the PEI sleeve pipe that section is regular hexagon and forms optical fiber monofilament fasces, PEI set Length of side 9.7mm in thickness of pipe wall 0.5mm, section.Optical fiber monofilament fasces is drawn into optical fiber multifilament on high-accuracy fiber drawing tower, Optical fiber multifilament section is the regular hexagon of 150 μm of the length of side.
(4) preparation of optical fiber image transmission beam:
The cutting of optical fiber multifilament is processed into the optical fiber multifilament section of length 50cm, tightly packed is into section by optical fiber multifilament section The optical fiber multifilament bundled of regular hexagon, the optical fiber multifilament area of beam length of side is 9.6mm.By optical fiber multifilament bundled two ends carry out hot gluing and Seal with wax, the optical fiber multifilament bundled that two ends gluing is sealed with wax is put into tetrahydrofuran solvent, make the polyetherimide amine solvent of sudden and violent leakage, that is, obtain Obtain flexible high-resolution regular hexagon Ge-Sb-Se coherent fiber bundles.
Optical fiber filament diameter is 5.6 μm, fibre optic image transmission area of beam in the infrared optical fiber coherent fiber bundle that the present embodiment is finally obtained Area is 2.4cm2, fill factor is 0.58, and optical fiber image transmission beam resolution ratio is 96lp/mm, 2~8 μm of spectral region.
It is the optical fiber image transmission beam of regular hexagon, its fill factor theoretical value for sectionFor section It is foursquare optical fiber image transmission beam, its fill factor theoretical valueWherein, d is that the final infrared optical fiber for obtaining is passed Optical fiber monofilament core diameter in video beam, D is optical fiber filament diameter in the final infrared optical fiber coherent fiber bundle for obtaining.In above-described embodiment The fill factor of offer is to carry out detection acquisition to optical fiber image transmission beam.

Claims (6)

1. the preparation method of the flexible infrared chalcogenide glass fiber coherent fiber bundle of high-resolution, it is characterised in that including step:
Step 1, three layers of coaxial configuration optical fiber monofilament are tightly packed into optical fiber filament tow, load thermoplastic polymer sleeve pipe and constitute Optical fiber monofilament fasces, three layers of described coaxial configuration optical fiber monofilament are from inside to outside followed successively by chalcogenide glass fibre core, chalcogenide glass Covering and thermoplastic polymer surrounding layer, wherein, chalcogenide glass fiber core refractive index n1, chalcogenide glass inner cladding refractive index n2And heat Thermoplastic polymer cladding refractive index n3Between there is relation:n1>n2>n3
Step 2, optical fiber multifilament is drawn into by optical fiber monofilament fasces;
Step 3, optical fiber multifilament is tightly packed into optical fiber multifilament bundled;
Optical fiber multifilament bundled two ends are carried out hot gluing and sealed with wax by step 4, then, are put into organic solvent and are removed exposed thermoplastic Property polymer, that is, obtain flexible high-resolution optical fiber image transmission bundle.
2. preparation method as claimed in claim 1, it is characterised in that:
Three layers of described coaxial configuration optical fiber monofilament are adopted and prepared with the following method:
Prepare chalcogenide glass plug, chalcogenide glass inner cladding sleeve pipe and thermoplastic polymer surrounding layer set respectively using extrusion Pipe, and it is assembled into three layers of coaxial configuration preform;
Three layers of coaxial configuration preform are drawn into three layers of coaxial configuration optical fiber monofilament.
3. preparation method as claimed in claim 1, it is characterised in that:
Organic solvent described in step 4 is tetrahydrofuran, dichloromethane or dimethylacetylamide.
4. preparation method as claimed in claim 1, it is characterised in that:
Described thermoplastic polymer surrounding layer is polysulfone resin surrounding layer, polyethersulfone resin surrounding layer or PEI outsourcing Layer.
5. preparation method as claimed in claim 1, it is characterised in that:
The component of described chalcogenide glass fibre core includes 1 or 2 kind of unit in 1 or 2 kind of element and sulphur, selenium, tellurium in germanium, arsenic, antimony Element.
6. preparation method as claimed in claim 1, it is characterised in that:
The component of described chalcogenide glass inner cladding include germanium, arsenic, antimony in 1 or 2 kind of element and sulphur, selenium, tellurium in 1 or 2 kind Element.
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