CN104181636A - Flexible high-resolution infrared chalcogenide glass optical fiber image transmission bundle and manufacturing method - Google Patents
Flexible high-resolution infrared chalcogenide glass optical fiber image transmission bundle and manufacturing method Download PDFInfo
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- CN104181636A CN104181636A CN201410422692.9A CN201410422692A CN104181636A CN 104181636 A CN104181636 A CN 104181636A CN 201410422692 A CN201410422692 A CN 201410422692A CN 104181636 A CN104181636 A CN 104181636A
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Abstract
The invention discloses a flexible high-resolution infrared chalcogenide glass optical fiber image transmission bundle and a manufacturing method. The optical fiber image transmission bundle is formed by closely stacking optical fiber multifilaments, the optical fiber multifilaments are formed by drawing optical fiber monofilament bundles, the optical fiber monofilament bundles are formed by closely stacking optical fiber monofilaments, the optical fiber monofilaments sequentially comprise chalcogenide glass fiber cores, chalcogenide glass inner coating layers and thermoplastics polymer outer coating layers from inside to outside, and the relation among the refractive index n1 of the chalcogenide glass fiber cores, the refractive index n2 of the chalcogenide glass inner coating layers and the refractive index n3 of the thermoplastics polymer outer coating layers is n1>n2>n3. The manufacturing process is simple and easy to control, the wire breakage rate of the optical fiber bundles is low, and the large-section high-resolution flexible infrared optical fiber image transmission bundle can be manufactured easily.
Description
Technical field
The invention belongs to infrared optical fiber coherent fiber bundle technical field, particularly the infrared chalcogenide glass fiber coherent fiber bundle of a kind of flexible high resolving power and preparation method.
Background technology
In recent years, infrared chalcogenide glass fiber, because it has excellent infrared transmission performance, good thermal stability and chemical stability, preparation is simple, cost is low and reelability etc. advantage, receives much concern in fields such as Laser Transmission, thermal imagery transmission, chemistry and bio-sensing, infrared spectroscopic studies.Chalcogenide glass refers to taking periodic table VIA family element S, Se, Te as amorphous material main, that introduce a certain amount of other metal or nonmetalloid formation.In chalcogenide glass fiber, the typical transmitted spectrum scope of sulfide, selenide and telluride optical fiber is respectively 1～6 μ m, 2～8 μ m and 4～12 μ m.Using flexible high resolving power chalcogenide glass fiber coherent fiber bundle as transmission waveguide, be connected with infrared imaging detector, can realize the transmission of high-quality infrared image, greatly reduce system weight and reduce system bulk, significantly reduce infrared system cost, improve system performance.Can be used for surveying the heat distribution of object in strong electromagnetic place, hazardous environment, narrow space or aperture, particularly there is very important application background in fields such as national defence, medical treatment and industrial detection.
At present, chalcogenide glass fiber coherent fiber bundle adopts multifilament method and layered manner preparation conventionally, and multifilament method is to prepare the effective ways of the hard coherent fiber bundle that monofilament is thin, resolution is high, but can not be for the preparation of flexible coherent fiber bundle.Layered manner is one of effective ways of preparation heavy in section coherent fiber bundle, owing to being limited to wire drawing and screening technique, is difficult to the coherent fiber bundle of preparation resolution higher than 40lp/mm.It is worth mentioning that, acid-soluble method for the preparation of flexible high resolving power multicomponent glass optical fiber coherent fiber bundle cannot be for the preparation of the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power, on the one hand because the key physical such as glass transition temperature, the thermal expansivity parameter of acid soluble glass is not mated with chalcogenide glass; Because the physical strength of chalcogenide glass fiber is low, in row's silk process, wire broken rate is high on the other hand.At present, the preparation of the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power still needs to overcome many technical barriers.
Summary of the invention
Be difficult to prepare the problem of flexible coherent fiber bundle for multifilament method in prior art, the invention provides the infrared chalcogenide glass fiber coherent fiber bundle of a kind of flexible high resolving power based on multifilament method and preparation method.
Thinking of the present invention is:
Introduce the glass transition temperature thermoplastic polymer identical or approaching with chalcogenide glass as chalcogenide glass fiber surrounding layer, be used for improving physical strength and the toughness of optical fiber monofilament, reduce the wire broken rate in row's silk process; And by the resolution of multifilament technique raising optical fiber image transmission beam.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
The infrared chalcogenide glass fiber coherent fiber bundle of a kind of flexible high resolving power, form by optical fiber multifilament is tightly packed, optical fiber multifilament is drawn and is formed by optical fiber filament tow, optical fiber filament tow forms 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 n
1, chalcogenide glass inner cladding refractive index n
2with thermoplastic polymer cladding refractive index n
3between there is relation: n
1>n
2>n
3.
Above-mentioned fibre optic image transmission area of beam is square or regular hexagon.
Above-mentioned optical fiber multifilament cross section is square or regular hexagon.
As preferably, the glass transition temperature of thermoplastic polymer is higher 0～50 DEG C than the glass transition temperature of chalcogenide glass, so just can under same temperature, realize the common wire drawing of chalcogenide glass and thermoplastic polymer.
As preferably, the component of chalcogenide glass fibre core comprises 1 or 2 kind of element in 1 in germanium, arsenic, antimony or 2 kind of element and sulphur, selenium, tellurium.
As preferably, the component of chalcogenide glass inner cladding comprises 1 or 2 kind of element in 1 in germanium, arsenic, antimony or 2 kind of element and sulphur, selenium, tellurium.
As preferably, thermoplastic polymer surrounding layer is polysulfone resin surrounding layer, polyethersulfone resin surrounding layer or polyetherimide surrounding layer.
The preparation method of the infrared chalcogenide glass fiber coherent fiber bundle of above-mentioned flexible high resolving power, comprises step:
Step 1, by the three layers of tightly packed one-tenth optical fiber of coaxial configuration optical fiber monofilament filament tow, pack thermoplastic polymer sleeve pipe into and form 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 inner cladding and thermoplastic polymer surrounding layer;
Step 2, is drawn into optical fiber multifilament by optical fiber monofilament fasces;
Step 3, is piled into optical fiber multifilament bundled by optical fiber multifilament;
Step 4, carries out optical fiber multifilament bundled two ends hot gluing and seals with wax, and then, puts into organic solvent and removes exposed thermoplastic polymer, obtains flexible high-resolution optical fiber image transmission bundle.
Above-mentioned three layers of coaxial configuration optical fiber monofilament are adopted preparation with the following method:
Adopt extrusion to prepare respectively chalcogenide glass plug, chalcogenide glass inner cladding sleeve pipe and thermoplastic polymer surrounding layer sleeve pipe, and be 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.
In step 1, the three layers of tightly packed one-tenth of coaxial configuration optical fiber monofilament cross section are square or orthohexagonal optical fiber filament tow.
In step 3, the tightly packed one-tenth of optical fiber multifilament cross section is square or orthohexagonal optical fiber multifilament bundled.
As preferably, the organic solvent described in step 4 is tetrahydrofuran, methylene chloride or dimethyl acetamide.
Optical fiber image transmission beam of the present invention has following characteristics and beneficial effect:
(1) adopt thermoplastic polymer surrounding layer can significantly improve physical strength and the toughness of optical fiber monofilament, and significantly reduced the wire broken rate of optical fiber monofilament in row's silk process.
(2) adopt multifilament and the stacked row's silk technique combining can realize the preparation of heavy in section, high-resolution infrared image guide, coherent fiber bundle can draw any required diameter as required.
(3) adopt the present invention can prepare minimum filament diameter <8 μ m, fibre bundle cross section >1cm
2, activity coefficient >0.5, resolution >70lp/mm, spectral range 1～12 μ m the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power.
Compared with existing infrared chalcogenide glass fiber coherent fiber bundle preparation method, the inventive method tool has the following advantages:
Fibre bundle wire broken rate is low; Preparation technology is simple and easy to control; Easily preparation 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 monofilament schematic cross-section, in figure, and 1-chalcogenide glass fibre core, 2-chalcogenide glass inner cladding, 3-thermoplastic polymer surrounding layer;
Fig. 2 is optical fiber multifilament cross sectional representation in embodiment 1;
Fig. 3 is the transversal schematic diagram of optical fiber multifilament bundled in embodiment 1.
Embodiment
To further illustrate the present invention by embodiment below, but protection domain of the present invention is not limited only to the cited case.
Embodiment 1: the preparation of high resolving power regular hexagon As-S optical fiber image transmission beam
The preparation of (1) three layer of coaxial configuration preform
Adopt extrusion molding to prepare respectively As
0.4s
0.6chalcogenide glass plug, As
0.38s
0.62chalcogenide glass inner cladding sleeve pipe and polyethersulfone 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 placed in respectively to vitreosil pipe, and quartz ampoule internal diameter and external diameter are respectively 40mm and 44mm, by the As of the synthetic diameter 40mm of traditional melting-quench
0.4s
0.6chalcogenide glass rod and As
0.38s
0.62chalcogenide glass rod.By As
0.4s
0.6chalcogenide glass rod and As
0.38s
0.62chalcogenide glass rod is put into respectively crowded rod and the crowded pipe grinding tool of extruder, adopts extrusion molding to obtain chalcogenide glass plug and chalcogenide glass inner cladding sleeve pipe, chalcogenide glass diameter of mandrel 16mm, and chalcogenide glass inner cladding casing inner diameter and external diameter are respectively 16.1mm and 19mm.
Polyethersulfone resin is made to the polyethersulfone resin rod of diameter 40mm, polyethersulfone resin rod is placed in to extruder and squeezes in pipe grinding tool, obtain polyethersulfone resin surrounding layer sleeve pipe by extrusion, polyethersulfone resin surrounding layer casing inner diameter and external diameter are respectively 19.1mm and 20mm.
By As
0.4s
0.6chalcogenide glass plug, As
0.38s
0.62chalcogenide glass inner cladding sleeve pipe becomes three layers of coaxial configuration preform with polyethersulfone resin surrounding layer sleeve-assembled.
The preparation of (2) three layers of coaxial configuration optical fiber monofilament
Three layers of coaxial configuration preform are drawn into the optical fiber monofilament of diameter 400 μ m on high-accuracy fiber drawing tower, Fig. 1 is optical fiber monofilament schematic cross-section, is from inside to outside followed successively by chalcogenide glass fibre core 1, chalcogenide glass inner cladding 2 and polyethersulfone resin surrounding layer 3.
(3) preparation of optical fiber multifilament:
Three layers of coaxial configuration optical fiber monofilament being cut to the optical fiber monofilament section that is processed into length 50cm, is orthohexagonal optical fiber filament tow by the tightly packed one-tenth of optical fiber monofilament section cross section, and this optical fiber filament tow is by 817 stacking forming of optical fiber monofilament, and its cross section length of side is 6.8mm.Packing optical fiber filament tow into cross section is in orthohexagonal polyethersulfone resin sleeve pipe, to form optical fiber monofilament fasces, polyethersulfone resin casing wall thickness 0.5mm, length of side 6.9mm in cross section.On high-accuracy fiber drawing tower, monofilament fasces is drawn into optical fiber multifilament, optical fiber multifilament cross section is the regular hexagon of the length of side 150 μ m, and optical fiber multifilament schematic cross-section is shown in Fig. 2.In this step, polyethersulfone resin sleeve pipe adopts the extrusion preparation described in step (1).
(4) preparation of optical fiber image transmission beam:
Optical fiber multifilament being cut to the optical fiber multifilament section that is processed into length 50cm, is orthohexagonal optical fiber multifilament bundled by the tightly packed one-tenth of optical fiber multifilament section cross section, and this optical fiber multifilament bundled cross section length of side is 6.5mm.Optical fiber multifilament bundled two ends are carried out to hot gluing and sealed with wax, glue together the schematic cross-section of optical fiber multifilament bundled after sealing with wax and see Fig. 3.The optical fiber multifilament bundled of sealing with wax is glued together in two ends and put into dichloromethane solvent, the sudden and violent polyethersulfone resin leaking is dissolved, obtain flexible high resolving power regular hexagon As-S coherent fiber bundle.
The optical fiber filament diameter that the present embodiment finally obtains in infrared optical fiber coherent fiber bundle is 7.6 μ m, and optical fiber image transmission beam area of section is 1.1cm
2, activity coefficient is 0.58, optical fiber image transmission beam resolution is 71lp/mm, spectral range 1～6 μ m.
Embodiment 2: the preparation of high resolving power square Te-As-Se optical fiber image transmission beam
The preparation of (1) three layer of coaxial configuration preform:
Extrusion molding described in employing embodiment 1 is prepared respectively Te
0.2as
0.3se
0.5chalcogenide glass plug, Te
0.16as
0.30se
0.54chalcogenide glass inner cladding sleeve pipe and polysulfone resin surrounding layer sleeve pipe, Te
0.2as
0.3se
0.5chalcogenide glass diameter of mandrel 16mm, Te
0.16as
0.30se
0.54the straight internal diameter of chalcogenide glass inner cladding sleeve pipe and external diameter are respectively 16.1mm and 19mm, and polysulfone resin surrounding layer casing inner diameter and external diameter are respectively 19.1mm and 20mm.By Te
0.2as
0.3se
0.5chalcogenide glass plug, Te
0.16as
0.30se
0.54chalcogenide glass inner cladding sleeve pipe becomes three layers of coaxial configuration preform with polysulfone resin surrounding layer sleeve-assembled.
The preparation of (2) three layers of coaxial configuration optical fiber monofilament:
The optical fiber monofilament that three layers of coaxial configuration preform is drawn into diameter 400 μ m on high-accuracy fiber drawing tower, 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:
Optical fiber monofilament being cut to the optical fiber monofilament section that is processed into length 50cm, is foursquare optical fiber filament tow by the tightly packed one-tenth of optical fiber monofilament section cross section, and this optical fiber filament tow is by 1024 stacking forming of optical fiber monofilament, and its cross section length of side is 12.8mm.Packing optical fiber filament tow into cross section is in foursquare polysulfone resin sleeve pipe, to form optical fiber monofilament fasces, length of side 12.9mm in polysulfone resin casing wall thickness 0.5mm, cross section.At high-accuracy fiber drawing tower, monofilament fasces is drawn into optical fiber multifilament, optical fiber multifilament cross section is the square of the length of side 200 μ m.
(4) preparation of optical fiber image transmission beam:
Optical fiber multifilament being cut to the optical fiber multifilament section that is processed into length 50cm, is foursquare optical fiber multifilament bundled by the tightly packed one-tenth of optical fiber multifilament section cross section, and this optical fiber multifilament bundled cross section length of side is 12.8mm.Optical fiber multifilament bundled two ends carried out to hot gluing and sealed with wax, the optical fiber multifilament bundled of sealing with wax is glued together in two ends and put into dimethylacetamide solvent, the sudden and violent polysulfone resin leaking is dissolved, obtaining flexible high resolving power square Te-As-Se coherent fiber bundle.
In the final infrared optical fiber coherent fiber bundle obtaining of the present embodiment, optical fiber filament diameter is 5.5 μ m, and optical fiber image transmission beam area of section is 1.6cm
2, activity coefficient is 0.51, optical fiber image transmission beam resolution is 86lp/mm, spectral range 4～12 μ m.
Embodiment 3: the preparation of flexible high resolving power regular hexagon Ge-Sb-Se optical fiber image transmission beam
The preparation of (1) three layer of coaxial configuration preform:
Adopt the extrusion molding described in embodiment 1 to prepare respectively Ge
0.13sb
0.17se
0.70chalcogenide glass plug, Ge
0.15sb
0.15se
0.70chalcogenide glass inner cladding sleeve pipe and polyetherimide surrounding layer sleeve pipe, Ge
0.13sb
0.17se
0.70chalcogenide glass diameter of mandrel 16mm, Ge
0.15sb
0.15se
0.70internal diameter and the external diameter of chalcogenide glass inner cladding sleeve pipe are respectively 16.1mm, 19mm, and internal diameter and the external diameter of polyetherimide surrounding layer sleeve pipe are respectively 19.1mm and 20mm.By Ge
0.13sb
0.17se
0.70chalcogenide glass plug, Ge
0.15sb
0.15se
0.70chalcogenide glass inner cladding sleeve pipe becomes three layers of coaxial configuration preform with polyetherimide surrounding layer sleeve-assembled.
The preparation of (2) three layers of coaxial configuration optical fiber monofilament:
The optical fiber monofilament that three layers of coaxial configuration preform is drawn into diameter 400 μ m on high-accuracy fiber drawing tower, 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:
Optical fiber monofilament being cut to the optical fiber monofilament section that is processed into length 50cm, is orthohexagonal optical fiber filament tow by the tightly packed one-tenth of optical fiber monofilament section cross section, and this optical fiber filament tow is by 1657 stacking forming of optical fiber monofilament, and its cross section length of side is 9.6mm.Packing optical fiber filament tow into cross section is in orthohexagonal polyetherimide sleeve pipe, to form optical fiber monofilament fasces, length of side 9.7mm in polyetherimide casing wall thickness 0.5mm, cross section.On high-accuracy fiber drawing tower, optical fiber monofilament fasces is drawn into optical fiber multifilament, optical fiber multifilament cross section is the regular hexagon of the length of side 150 μ m.
(4) preparation of optical fiber image transmission beam:
Optical fiber multifilament being cut to the optical fiber multifilament section that is processed into length 50cm, is orthohexagonal optical fiber multifilament bundled by the tightly packed one-tenth of optical fiber multifilament section cross section, and this optical fiber multifilament bundled cross section length of side is 9.6mm.Optical fiber multifilament bundled two ends carried out to hot gluing and sealed with wax, the optical fiber multifilament bundled of sealing with wax is glued together in two ends and put into tetrahydrofuran solvent, making the sudden and violent polyetherimide amine solvent leaking, obtaining flexible high resolving power regular hexagon Ge-Sb-Se coherent fiber bundle.
In the final infrared optical fiber coherent fiber bundle obtaining of the present embodiment, optical fiber filament diameter is 5.6 μ m, and optical fiber image transmission beam area of section is 2.4cm
2, activity coefficient is 0.58, optical fiber image transmission beam resolution is 96lp/mm, spectral range 2～8 μ m.
Be orthohexagonal optical fiber image transmission beam for cross section, its activity coefficient theoretical value
be foursquare optical fiber image transmission beam for cross section, its activity coefficient theoretical value
wherein, d is optical fiber monofilament core diameter in the final infrared optical fiber coherent fiber bundle obtaining, and D is optical fiber filament diameter in the final infrared optical fiber coherent fiber bundle obtaining.The activity coefficient providing in above-described embodiment is all that optical fiber image transmission beam is detected to acquisition.
Claims (9)
1. the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power, is characterized in that:
Form by optical fiber multifilament is tightly packed, optical fiber multifilament is drawn and is formed by optical fiber filament tow, optical fiber filament tow forms 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 n
1, chalcogenide glass inner cladding refractive index n
2with thermoplastic polymer cladding refractive index n
3between there is relation: n
1>n
2>n
3.
2. the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power as claimed in claim 1, is characterized in that:
Described fibre optic image transmission area of beam is square or regular hexagon.
3. the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power as claimed in claim 1, is characterized in that:
Described optical fiber multifilament cross section is square or regular hexagon.
4. the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power as claimed in claim 1, is characterized in that:
The component of described chalcogenide glass fibre core comprises 1 or 2 kind of element in 1 in germanium, arsenic, antimony or 2 kind of element and sulphur, selenium, tellurium.
5. the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power as claimed in claim 1, is characterized in that:
The component of described chalcogenide glass inner cladding comprises 1 or 2 kind of element in 1 in germanium, arsenic, antimony or 2 kind of element and sulphur, selenium, tellurium.
6. the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power as claimed in claim 1, is characterized in that:
Described thermoplastic polymer surrounding layer is polysulfone resin surrounding layer, polyethersulfone resin surrounding layer or polyetherimide surrounding layer.
7. the preparation method of the infrared chalcogenide glass fiber coherent fiber bundle of flexible high resolving power claimed in claim 1, is characterized in that, comprises step:
Step 1, by the three layers of tightly packed one-tenth optical fiber of coaxial configuration optical fiber monofilament filament tow, pack thermoplastic polymer sleeve pipe into and form 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 inner cladding and thermoplastic polymer surrounding layer;
Step 2, is drawn into optical fiber multifilament by optical fiber monofilament fasces;
Step 3, is piled into optical fiber multifilament bundled by optical fiber multifilament;
Step 4, carries out optical fiber multifilament bundled two ends hot gluing and seals with wax, and then, puts into organic solvent and removes exposed thermoplastic polymer, obtains flexible high-resolution optical fiber image transmission bundle.
8. preparation method as claimed in claim 7, is characterized in that:
Three layers of described coaxial configuration optical fiber monofilament are adopted preparation with the following method:
Adopt extrusion to prepare respectively chalcogenide glass plug, chalcogenide glass inner cladding sleeve pipe and thermoplastic polymer surrounding layer sleeve pipe, and be 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.
9. preparation method as claimed in claim 7, is characterized in that:
Organic solvent described in step 4 is tetrahydrofuran, methylene chloride or dimethyl acetamide.
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Inventor after: Zhang Bin Inventor after: Yang Zhiyong Inventor after: Zhai Chengcheng Inventor after: Qi Sisheng Inventor after: Guo Wei Inventor after: Ren He Inventor after: Zhang Mingjie Inventor after: Yang Anping Inventor before: Zhang Bin Inventor before: Yang Zhiyong Inventor before: Zhai Chengcheng Inventor before: Qi Sisheng Inventor before: Guo Wei Inventor before: Ren He Inventor before: Zhang Mingjie Inventor before: Yang Anping Inventor before: Tang Dingyuan |