CN105060700B - Soft glass preform producing device and method - Google Patents
Soft glass preform producing device and method Download PDFInfo
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- CN105060700B CN105060700B CN201510478413.5A CN201510478413A CN105060700B CN 105060700 B CN105060700 B CN 105060700B CN 201510478413 A CN201510478413 A CN 201510478413A CN 105060700 B CN105060700 B CN 105060700B
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Abstract
A kind of soft glass preform producing device and method based on double crucible laminar flows leakage note, device includes coaxial interior crucible and outer crucible, the outer crucible is longer than the inner crucible, so that the interior crucible can be surrounded completely after sealing, agitating device is respectively arranged with interior crucible and outer crucible, there is the outlet being connected with mould in the bottom of described interior crucible, described mould is built-in with piston and its electric drive mechanism, described interior crucible and outer crucible is placed in high temperature furnace, described mould is placed in heater, described mould and electric drive mechanism is placed on hoistable platform；Described interior crucible, outer crucible, agitating device, high temperature furnace, heater and hoistable platform is separately mounted on pylon.The present invention moves down speed by piston and determines Lou note speed, by controlling the viscosity and leakage note speed of glass metal, the Reynolds number of leakage note process is can control, to ensure to leak note process as laminar flow.
Description
Technical field
The present invention relates to the manufacturing technology of soft glass optical fiber, also known as multicomponent glass optical fiber, is specifically that one kind is based on double earthenwares
The soft glass preform producing device and method of crucible laminar flow leakage note.
Background technology
Soft glass optical fiber refers to the multicomponent glass optical fiber of non-quartzy base, and it has some unique optics and spectroscopy
Matter.Such as the sub- solubility of high rare earth, wide gain spectra, high non-linearity etc..It can be widely applied to single-frequency laser, ultrashort pulse swashs
Light device and Ramar laser etc..Some soft glass optical fiber are infrared in be can pass through, and can be widely applied to the optical fiber of middle infrared band
Laser device.This is silica fibre institute irreplaceable important application completely.Mid-infrared laser light source national defence, biomedicine and
There is important application in the fields such as tip scientific research.
So far, the loss of soft glass optical fiber is higher.Height loss is to restrict wide variety of one of soft glass optical fiber
Principal element.The loss of optical fiber depends primarily on the quality of prefabricated rods.Due to complicated component, and lack corresponding gaseous state chemical combination
Thing, soft glass preform can not use vapour deposition process as prefabricated quartz fiber rod.Conventional method has rod-in-tube technique
And the methods of column absorbing method.
Rod-in-tube technique is to apply most common prefabricated rods preparation method.It is mainly characterized by making plug and cladding glass respectively
Pipe, pipe and rod are nested together, you can form prefabricated rods.The defects of rod-in-tube technique is there is being difficult to overcome.Machining pipe or
During rod, the contaminant particles that pipe rod surface is easy to be polished in material and environment are polluted.When drawing optical fiber, the inner surface of pipe and
The surface of plug is actually to expose in the environment, it is easy to is polluted by ambient impurities.Therefore, rod-in-tube technique is to production environment
Requirement it is very strict.Further, since the presence of material surface energy, glass in softening easily in Surface Crystallization, so, pipe
Inner surface and the mandrel surface also easy crystallization when heating and softening.For some soft glass, this crystallization can cause than more serious
Fibre loss is very big.
When column absorbing method makes prefabricated rods.Mould is placed on bottom plate, bottom plate and mould have preheated in advance.By what is melted
Cladding glass liquid is poured into mould, and then sandwich layer glass metal is cast on cladding glass liquid.Lift mould rapidly upwards
A small amount of cladding glass liquid is set to be spilt from die end.Because the temperature low viscosity at glass metal and the interface of contacting dies is big, center
Temperature high viscosity it is small, the process that cladding glass liquid flows downward by gravity occurs mainly in fluid column centre, thus can
Form core --- cladding structure.
The sharpest edges of column absorbing method are, it is no longer necessary to sleeve pipe and plug are processed as rod-in-tube technique, thus pipe is also not present
Caused by rod method the problem of the increase of core covering interface loss.Column absorbing method can obtain excellent core covering interface quality.But
The shortcomings that this method is also fairly obvious.First, it is difficult accurately to hold to lift the opportunity of mould and hoisting depth, difficulty
Greatly, stability and uniformity are poor；Secondly, the core material of suction usually shows taper, it is difficult to obtains the prefabricated of sandwich layer constant diameter
Rod；In addition, pouring type used by column absorbing method, it is difficult the glass for producing the excellent high quality of optical homogeneity to determine it
Bar.
In summary, currently without a kind of suitable prefabricated rods making apparatus and technology, core covering interface can be produced
Closing, the soft glass preform that longitudinal size is constant, optical homogeneity is good.
The content of the invention
The present invention is a kind of new preform making apparatus and its using technology.The present invention is to solve current light
The problem of fine prefabricated rods manufacturing technology is present and propose.This equipment makes prefabricated rods using double crucible laminar flow leakage note modes, is based on
The rod technology processed of the equipment can solve the technical barrier that current rod-in-tube technique and column absorbing method are difficult to overcome.
The technical solution of the present invention is as follows：
A kind of that the soft glass preform producing device noted is leaked based on double crucible laminar flows, its feature is, including coaxial
Interior crucible and outer crucible, the outer crucible is longer than the interior crucible, so that the interior crucible can be surrounded completely after sealing,
Agitating device is respectively arranged with interior crucible and outer crucible, has what is be connected with mould to go out in the bottom of described interior crucible
Mouthful, described mould is built-in with piston and its electric drive mechanism, and described interior crucible and outer crucible are placed in high temperature furnace, described
Mould be placed in heater, described mould and electric drive mechanism are placed on hoistable platform；Described interior crucible, outer earthenware
Crucible, agitating device, high temperature furnace, heater and hoistable platform are separately mounted on pylon.
Described interior crucible and outer crucible is platinum material, and the volume of outer crucible is 2.5L, lower end outlet diameter 3cm,
The volume 0.8L of interior crucible, lower end outlet diameter 1cm.
Described mould is heat-resistance stainless steel material, in three-clove style, length 2.5m, internal diameter 3cm, external diameter 5cm.
The body of heater of described high temperature furnace uses aluminum oxide or magnesium oxide material, and heat generating component uses Si-Mo rod, maximum temperature
For 1500 degree, temperature-controlled precision ± 0.5 degree.
Described heater is cylindric, and mould is surrounded, and the thermal insulation furnace body of heater is split up into two parts, convenient to take out
Mould, the heat generating component of heater use resistance wire material, and insulation material is refractory brick, and maximum temperature is 800 degree.
Crucible can be exported and sealed by described piston, and be moved up and down in a mold, stroke 2m, with mould assembly building
Gap is less than 0.3mm.
The stroke of described hoistable platform is 0.3m, maximum capacity 200kg.
The method that soft glass preform is made using described soft glass preform producing device, its feature sign
It is, this method comprises the following steps：
1. heat up high temperature furnace, by core glass material and cladding glass material respectively including, found in outer crucible；
2. preheating heater, after core and cladding glass liquid melt, move down piston, by glass metal leakage note to mould
Interior formation prefabricated rods；
3. heater is cooled into room temperature according to annealing temperature flow, hoistable platform is fallen, mould is taken out, obtains prefabricated
Rod.
Described step 2. middle piston move down speed determine Lou note speed, by control glass metal viscosity and leakage note speed
Rate, the Reynolds number of control leakage note process, to ensure to leak note process as laminar flow.
Preform making apparatus of the present invention, it is using process, and heat up high temperature furnace, by covering and core glass
Material is founded in two crucibles respectively.Heater is preheated, after core and cladding glass liquid melt, piston moves down, by glass
Prefabricated rods are formed in liquid leakage note to mould.Piston moves down speed and determines Lou note speed.By the viscosity and the leakage that control glass metal
Speed is noted, can control the Reynolds number of leakage note process, to ensure to leak note process as laminar flow.Heater is dropped according to annealing temperature flow
Temperature arrives room temperature, falls lifting pedestal, takes out mould, obtains prefabricated rods.Prefabricated rods surface can be machined as needed,
Such as levigate, polishing (due to interface of the outer surface away from core and covering of machining, fibre loss will not be increased).
The technical principle of the present invention：
During flow of fluid, if the track of fluid particle is well-regulated smooth curve (simplest situation is straight line),
Laminar flow is in this flowing.There is no the flowing of this property turbulent flow.Turbulent flow is the irregular movement of fluid, in flow field various amounts with
The change that time and space coordinates get muddled.
It is to be in laminar flow or turbulent flow that fluid, which studies carefully meaning, can be come according to Reynolds number (Reynolds number, be abbreviated as Re)
Judge：
Re=ρ vd/ μ (1)
(1) in formula, ρ is fluid density, and v is flow velocity, and d is the diameter of the pipe residing for fluid, and μ is fluid viscosity.
Reynolds number is a dimensionless number for differentiating viscous fluid flow state.When Reynolds number is smaller, viscous force stream field
Influence be more than inertia force, in the event of small random perturbation in flow process, growth disturbance over time can be because of viscous force
And gradually decay down, thus flow of fluid is stable, is laminar flow；Conversely, when if Reynolds number is larger, the influence of inertia force stream field
More than viscous force, flow of fluid is unstable, and the minor variations of flow velocity easily develop, strengthened, and forms disorderly, irregular more turbulent flow
.In Guan Liuzhong, flowing of the Reynolds number less than 2300 is laminar flow, Reynolds number between 2300~4000 when be transition state, Reynolds
When number is more than 4000 is turbulent flow.
If by the viscosity of temperature control glass metal, and the speed for controlling piston to move down, it is possible to Reynolds number is controlled
In a relatively low scope, so as to obtain good laminar flow effect, good core covering interface is so ensured that.Together
When, good laminar flow effect can also make the uniformity of sandwich layer and cladding glass liquid close to its be in crucible when homogenizing shape
State, the prefabricated rods for making finally to obtain have good optical homogeneity.
Compared with prior art, the beneficial effects of the invention are as follows：
1. the core covering interface of closing：Core covering interface is separation not as rod-in-tube technique, so as to avoid environment
The pollution of grain thing and Surface Crystallization effect.
2. excellent optical homogeneity：The formation of barred body is the controllable leakage note process of speed, rather than as column absorbing method
Cast, thus the optical homogeneity of prefabricated rods can be ensured.
3. good longitudinal core diameter uniformity：It can make along the consistent prefabricated rods of prefabricated rods length direction core diameter, rather than
The tapered core as column absorbing method.
Brief description of the drawings
The double crucible laminar flow leakage note equipment of Fig. 1 totally equip figure
The double crucibles of Fig. 2 and agitator partial cutaway schematic
The double crucible laminar flow leakage note legal systems of Fig. 3 make soft glass prefabricated rods process schematic
The demoulding obtains prefabricated rods after Fig. 4 annealing
Embodiment
The present invention is further described below in conjunction with the accompanying drawings, but should not be limited the scope of the invention with this.
As shown in Figure 1-2, a kind of soft glass preform producing device based on double crucible laminar flows leakage note, including it is coaxial
Interior crucible 1 and outer crucible 2, the outer crucible is longer than the inner crucible, can surround the interior earthenware completely after sealing
Crucible, agitating device 3 is respectively arranged with interior crucible 1 and outer crucible 2, had and the phase of mould 4 in the bottom of described interior crucible 1
The outlet of connection, described mould 4 are built-in with piston and its electric drive mechanism 5, and described interior crucible 1 and outer crucible 2 are placed on
In high temperature furnace 6, described mould 4 is placed in heater 7, and described mould 4 and electric drive mechanism 5 are placed on hoistable platform 8
On；Described interior crucible, outer crucible, agitating device, high temperature furnace, heater and hoistable platform is separately mounted on pylon 9.It is described
Interior crucible and outer crucible be platinum material, the volume of outer crucible is 2.5L, lower end outlet diameter 3cm, the volume of interior crucible
0.8L, lower end outlet diameter 1cm.Described mould is heat-resistance stainless steel material, is in three-clove style, length 2.5m, internal diameter
3cm, external diameter 5cm.The body of heater of described high temperature furnace uses aluminum oxide or magnesium oxide material, and heat generating component uses Si-Mo rod, most
High-temperature is 1500 degree, temperature-controlled precision ± 0.5 degree.Described heater is cylindric, mould is surrounded, the holding furnace of heater
Body is split up into two parts, convenient to take out mould, and the heat generating component of heater uses resistance wire material, and insulation material is refractory brick,
Maximum temperature is 800 degree.Crucible can be exported and sealed by described piston, and be moved up and down in a mold, stroke 2m, be filled with mould
It is less than 0.3mm with gap.The stroke of described hoistable platform is 0.3m, maximum capacity 200kg.
The method that soft glass preform is made using described soft glass preform producing device, including it is as follows
Step：
1. heat up high temperature furnace, by core glass material 10 and cladding glass material 11 respectively including, found in outer crucible；
2. preheating heater, after core and cladding glass liquid melt, move down piston, by glass metal leakage note to mould
Interior formation prefabricated rods 12；
3. heater is cooled into room temperature according to annealing temperature flow, hoistable platform is fallen, mould is taken out, obtains prefabricated
Rod.
Described step 2. middle piston move down speed determine Lou note speed, by control glass metal viscosity and leakage note speed
Rate, the Reynolds number of control leakage note process, to ensure to leak note process as laminar flow.
By taking tellurate glass preform as an example：When making prefabricated rods, piston is first raised to crucible bottom, crucible is gone out
Mouth seals.Liftable base is preferably minimized by operation lifting platform control button, by mould on base.Base has sunk type to connect
Confession mould is embedded in.Base is risen to and is connected with crucible bottom end outlet.Closed die heater, and heated up in 30 minutes
To 500 degree of holdings.3 kilograms of core glass material and 10 kilograms of cladding glass material are placed in interior outer crucible, were warming up in one hour
800 degree keep with fusion cast glass.Ventilation is protected and stirs homogenizing in melting process.After about 1 hour, piston control button is operated,
Piston is moved downwardly until bottom with 0.1m/s speed, completes leakage note process.Heater rapid temperature is down to annealing temperature
320 degree of degree.Annealing 3 hours, room temperature is cooled to 30 degree/hour.Then Liftable base control button is operated, by liftable bottom
Seat minimizes, and removes the mould containing prefabricated rods, and the demoulding can obtain prefabricated rods.Prefabricated rods are about 2m, core diameter 1cm, external diameter
3cm.The bar-shaped of 30-50cm length can be cut into prefabricated rods segmentation as needed.
Claims (9)
1. a kind of soft glass preform producing device based on double crucible laminar flows leakage note, it is characterised in that including coaxial
Interior crucible (1) and outer crucible (2), the outer crucible are longer than the interior crucible, can surround the interior earthenware completely after sealing
Crucible, agitating device (3) is respectively arranged with interior crucible (1) and outer crucible (2), is had in the bottom of described interior crucible (1)
The outlet being connected with mould (4), described mould (4) are built-in with piston and its electric drive mechanism (5), described interior crucible
(1) it is placed on outer crucible (2) in high temperature furnace (6), described mould (4) is placed in heater (7), described mould (4)
And electric drive mechanism (5) is placed on hoistable platform (8)；Described interior crucible, outer crucible, agitating device, high temperature furnace, heater
It is separately mounted to hoistable platform on pylon (9).
2. soft glass preform producing device according to claim 1, it is characterised in that described interior crucible and outer
Crucible is platinum material, and the volume of outer crucible is 2.5L, lower end outlet diameter 3cm, the volume 0.8L of interior crucible, and lower end exports
Diameter 1cm.
3. soft glass preform producing device according to claim 1, it is characterised in that described mould is heat-resisting
Stainless steel material, in three-clove style, length 2.5m, internal diameter 3cm, external diameter 5cm.
4. soft glass preform producing device according to claim 1, it is characterised in that the stove of described high temperature furnace
Body uses aluminum oxide or magnesium oxide material, and heat generating component uses Si-Mo rod, and maximum temperature is 1500 degree, temperature-controlled precision ± 0.5 degree.
5. soft glass preform producing device according to claim 1, it is characterised in that described heater is circle
Column, mould is surrounded, the thermal insulation furnace body of heater is split up into two parts, and convenient to take out mould, the heat generating component of heater is adopted
With resistance silk material matter, insulation material is refractory brick, and maximum temperature is 800 degree.
6. soft glass preform producing device according to claim 1, it is characterised in that described piston can be by outside
Crucible outlet seals, and moves up and down in a mold, stroke 2m, is less than 0.3mm with mould fit-up gap.
7. soft glass preform producing device according to claim 1, it is characterised in that described hoistable platform
Stroke is 0.3m, maximum capacity 200kg.
8. the method for soft glass preform is made using the soft glass preform producing device described in claim 1,
Characterized in that, this method comprises the following steps：
1. heat up high temperature furnace, by core glass material (10) and cladding glass material (11) respectively including, found in outer crucible；
2. preheating heater, after core and cladding glass liquid melt, move down piston, by glass metal leakage note to shape in mould
Into prefabricated rods (12)；
3. heater is cooled into room temperature according to annealing temperature flow, hoistable platform is fallen, mould is taken out, obtains prefabricated rods.
9. it is according to claim 8 make soft glass preform method, it is characterised in that described step 2. in
Piston moves down speed and determines Lou note speed, by controlling the viscosity and leakage note speed of glass metal, the Reynolds of control leakage note process
Number, to ensure to leak note process as laminar flow.
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| CN201510478413.5A CN105060700B (en) | 2015-08-07 | 2015-08-07 | Soft glass preform producing device and method |
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| CN106186664B (en) * | 2016-07-22 | 2018-07-27 | 北京玻璃研究院 | A kind of double crucibles for drawing Infrared Optical Fibers Made From Chalcogenide Glass |
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| CN113387557B (en) * | 2018-07-26 | 2022-11-04 | 杭州富通通信技术股份有限公司 | Optical fiber processing device |
| CN110683753B (en) * | 2019-10-11 | 2021-08-27 | 华中科技大学 | Low-cost batch preparation method and system for multi-material multi-structure mid-infrared optical fiber |
| CN110981180B (en) * | 2019-12-13 | 2021-10-15 | 中国科学院西安光学精密机械研究所 | Device and method for preparing single-mode optical fiber preform |
| CN110818246B (en) * | 2019-12-20 | 2023-12-26 | 杭州永通智造科技有限公司 | Stable flow field device of clean reaction chamber for preform cladding deposition |
| CN113716857B (en) * | 2021-08-24 | 2022-08-02 | 华南理工大学 | Double-clad single-mode soft glass optical fiber and preparation method and application thereof |
| CN114620933B (en) * | 2022-03-28 | 2023-02-14 | 中国科学院上海光学精密机械研究所 | Preparation device and method of glass optical fiber preform |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0004183A1 (en) * | 1978-03-14 | 1979-09-19 | The Post Office | Method and apparatus for drawing optical fibres by means of a double crucible |
| US4243296A (en) * | 1977-09-27 | 1981-01-06 | Siemens Aktiengesellschaft | Optical unit having a longitudinal side coupling zone |
| US4729777A (en) * | 1985-08-22 | 1988-03-08 | Kokusai Denshin Denwa Kabushiki Kaisha | Method and apparatus for manufacturing preform for fluoride glass fiber |
| CN1182720A (en) * | 1996-11-06 | 1998-05-27 | 日本板硝子株式会社 | Glass composition of core/clad structure refractive index distribution type optical element |
| CN101492248A (en) * | 2009-02-27 | 2009-07-29 | 中国科学院上海光学精密机械研究所 | 2 [mu]m laser output thulium tellurate doped glass and optical fiber, and producing method thereof |
-
2015
- 2015-08-07 CN CN201510478413.5A patent/CN105060700B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243296A (en) * | 1977-09-27 | 1981-01-06 | Siemens Aktiengesellschaft | Optical unit having a longitudinal side coupling zone |
| EP0004183A1 (en) * | 1978-03-14 | 1979-09-19 | The Post Office | Method and apparatus for drawing optical fibres by means of a double crucible |
| US4729777A (en) * | 1985-08-22 | 1988-03-08 | Kokusai Denshin Denwa Kabushiki Kaisha | Method and apparatus for manufacturing preform for fluoride glass fiber |
| CN1182720A (en) * | 1996-11-06 | 1998-05-27 | 日本板硝子株式会社 | Glass composition of core/clad structure refractive index distribution type optical element |
| CN101492248A (en) * | 2009-02-27 | 2009-07-29 | 中国科学院上海光学精密机械研究所 | 2 [mu]m laser output thulium tellurate doped glass and optical fiber, and producing method thereof |
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