CN202022852U - Total synthesis oversize ultra-low-water-peak optical fiber preform manufacturing equipment - Google Patents
Total synthesis oversize ultra-low-water-peak optical fiber preform manufacturing equipment Download PDFInfo
- Publication number
- CN202022852U CN202022852U CN 201120078881 CN201120078881U CN202022852U CN 202022852 U CN202022852 U CN 202022852U CN 201120078881 CN201120078881 CN 201120078881 CN 201120078881 U CN201120078881 U CN 201120078881U CN 202022852 U CN202022852 U CN 202022852U
- Authority
- CN
- China
- Prior art keywords
- rod
- flow
- sintering
- optical fiber
- blowtorch
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01413—Reactant delivery systems
- C03B37/0142—Reactant deposition burners
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
- C03B2201/22—Doped silica-based glasses doped with non-metals other than boron or fluorine doped with deuterium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/62—Distance
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The utility model relates to total synthesis oversize ultra-low-water-peak optical fiber preform manufacturing equipment, in particular to equipment for manufacturing a total synthesis oversize ultra-low-water-peak optical fiber preform. A method for manufacturing the total synthesis oversize ultra-low-water-peak optical fiber preform comprises the following steps of: adjusting the flow and the position of a blast lamp group and increasing the diameter of a core layer under the condition of not changing the diameter of a mandrel parent material; and performing deuterium gas treatment before the vitrification process of a mandrel powder bar and porous glass preforms. The manufacturing equipment comprises a deposition device for an optical fiber preform mandrel parent material and a sintering device for the optical fiber preform mandrel parent material and the porous glass preforms, wherein the deposition device of the optical fiber preform mandrel parent material comprises a gas supply part, a rotary elevating part and a control part; the rotary elevating part consists of a servo motor, a transmission screw rod, a lead screw nut and a deposition suspender; and the sintering device of the optical fiber preform mandrel parent material and the porous glass preform comprises a sintering gas supply part, a preform rotary elevating part and a sintering furnace.
Description
Technical field
The utility model relates to the ultralow water peak fiber prefabricated rods of a kind of complete synthesis oversize producing apparatus, is exactly the producing apparatus for preparing the ultralow water peak fiber prefabricated rods of oversize specifically.
Background technology
Since 21st century, the competition of optical fiber industry grows in intensity, the price of preform, optical fiber and optical cable is also kept falling, and the cost competition becomes the primary factor of the sector market competition gradually, and the cost that therefore how to reduce product also becomes the focus that each major company pays close attention to.
Studies show that, increase the size of preform, but also promptly improve the cost that the length of string of single prefabricated rods can very effective reduction unit length optical fiber.For example, press 100 yuan/core of optical fiber kilometer and calculate, the size of prefabricated rods is increased to 120mm by 80mm, then SiO
2The sedimentation rate of powder is brought up to 80g/min by original 30g/min, and the annual capacity of single device improves 100%; SiCl
4Utilization ratio of raw materials brings up to 60% by original 30%, and this is also reducing exhausted air quantity discharging 50% when improving raw material availability; Single rod length of towing reaches more than the 1200km, and plant factor is high by 15% than φ 80mm prefabricated rods during follow-up wire drawing, can save water, electricity, gas to a certain extent, and 1 kilogram of prefabricated rods of every wire drawing can be saved 3 yuan energy consumption.Therefore, the maximization of prefabricated rods size becomes each company and reduces the optical fiber cost, improves the inevitable choice of the market competitiveness.
But the prefabricated rods of preparation oversize is subjected to the restriction of device diameters such as deposition chamber and stove, if the diameter of these equipment is all transformed, to adapt to the preparation of big stick-means of intimidation footpath prefabricated rods, then not only improvement expenses is huge, and the control of temperature field in furnace will become more difficult.
If also be to use these equipment, effectively way reduces core bag ratio exactly, be the difference of optics covering and sandwich layer diameter and the ratio of sandwich layer diameter, but reduction core bag compares also impossible unconfined reduction, because if the words of optics covering attenuation, extraneous moisture is easy to invade sandwich layer, causes the water peak value higher, thus reduce the core bag also can only be in a scope than this way cautious carrying out.
As everyone knows, on the decay spectrogram of silica-based optical fiber, (1280nm ~ 1325nm) and the second transmission window 1550nm district are (near the 1383nm wavelength between the 1380nm ~ 1565nm) in the first transmission window 1310nm district, a higher water absorption peak is arranged usually, be commonly referred to the water peak, in the 1380nm window, stop the available hertzian wave to pass through.Intravital silicon-dioxide (the Si0 of hydrogen atom and glass-based
2), germanium dioxide (Ge0
2) and other oxygenatedchemicalss in the oxygen combination, form hydroxyl (-OH/-OH
2).Because the hydroxyl (-OH/-OH in the glass
2) decay that caused is about 0.5 ~ 1.0dB/km, attenuation peak is usually in " 1380nm window " (wavelength region of about 1330 ~ 1470nm).Along with the recent advances of wavelength-division multiplex (WDM), amplifier technology and laser source aspect, the water peak of eliminating 1380nm seems important day by day.
The prefabricated rods technology develops to " two-step approach " direction in the world at present, promptly prepares plug with the wherein any method of VAD, OVD, PCVD, MCVD, prepares surrounding layer with methods such as tiretube process, plasma spraying method, flame hydrolysiss again.The surrounding layer technical development make preform do slightlyer, longer, further improve optical fiber production efficient, reduce production costs.
Since oxygenate impurity and hydroxyl impurity in the raw material halogenide, the aqueous vapor body in the current-carrying gas, and the hydroxyl (OH in the quartz glass tube
-) diffusion, making that the fibre-optical preform hydroxy radical content of powder method prepared is higher, the optical fiber of drawing is subjected to hydroxyl contamination.By hydroxyl contamination, reduce the decay that the water peak causes for fear of optical fiber, people generally adopt chemical dehydration, promptly before carrying out vitrifying, utilize thionyl chloride (SOCl2), chlorine (Cl
2) wait the substitution reaction of chemical reagent to hydroxyl, optical fiber preform is carried out halogenation (2Si-OH+Cl
2→ 2Si-O+2HCl).The chemical dehydration that utilizes the halogenation process and carry out for reduce residual hydroxy groups (-OH) content is very effective.
But (-OH) content and then reduce the technical requirements of water peak decay significantly, under present processing condition, the halogenation evaporation is to reach requirement at the hydroxyl of further reduction optical fiber preform.
Summary of the invention
The utility model is that the weak point at the present situation of above-mentioned preform provides the ultralow water peak fiber prefabricated rods of a kind of complete synthesis oversize producing apparatus, the preform size of this equipment preparation is big, the water peak is low: the fiber lengths that every rod can be pulled out reaches more than the 3000km, at present general diameter is the preform of 80mm, its production capacity will improve more than 100%, improve the production efficiency of wire-drawing equipment to a great extent, saved production cost.
At present, the prefabricated rods that the rod footpath surpasses φ 120mm is called large size prefabricated rod, and the preform diameter that the utility model equipment is produced can reach 185mm greater than 150 mm, can be referred to as super large; Described low water peak is that the optical fiber after the hydrogen loss is lower than 0.344dB/km at the water peak of 1383nm reduction coefficient, and the pad value of the preform 1383nm that the utility model equipment is produced is lower than 0.27dB/km, can be referred to as ultralow water peak.
For convenience of description, do to give a definition:
Plug: comprise sandwich layer and optics covering, plug and surrounding layer have constituted preform jointly;
Sandwich layer: the high refractive index part that contains element Ge in the prefabricated rod mandrel mother metal;
Optics covering: the low-refraction part outside the prefabricated rod mandrel mother metal center core layer;
Core bag ratio: the difference of optics covering and sandwich layer diameter and sandwich layer diameter ratio, the core bag is than between 2.5 ~ 4.5;
Surrounding layer: be at the outer deposition silicon tetrachloride (SiCl that continues of plug
4) raw material is formed.
The ultralow water peak fiber prefabricated rods of a kind of complete synthesis oversize producing apparatus is to take following technical scheme to realize:
The ultralow water peak fiber prefabricated rods of a kind of complete synthesis oversize producing apparatus comprises the agglomerating plant of a kind of deposition apparatus of optical fiber prefabricated rod mandrel mother metal and optical fiber prefabricated rod mandrel mother metal, porous glass preform rod.
The deposition apparatus of described optical fiber prefabricated rod mandrel mother metal comprises the gas supply section, rotates and upgrades part, control section.Wherein the gas supply section comprises the control unit of burners set and control blowtorch flow; Rotating and upgrading part is made up of servomotor, drive lead screw, feed screw nut and deposition suspension rod; Control section is made up of position measurement instrument and PLC, and it all is the commercially available prod, and measuring accuracy is higher relatively.
Described suspension rod can move up and down, and translational speed is by the determining positions of core rod base metal lower surface; Also can be along being rotated counterclockwise, speed of rotation is fixed, and is 5r/min～30r/min, but optimum velocity is 15r/min～25r/min, and the action of deposition suspension rod is controlled by PLC, and servomotor is carried out.
Described burners set comprises three blowtorch, is divided into c blowtorch, b blowtorch, a blowtorch, and wherein the effusive raw material of c blowtorch is silicon tetrachloride (SiCl
4), germanium tetrachloride (GeCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar), the sandwich layer part of deposition core rod base metal; B blowtorch and a blowtorch then deposit the optics clad section of plug, and effusive raw material is silicon tetrachloride (SiCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar).
The position of described burners set is by the base adjustment of blowtorch, can four-dimensionally adjust, comprise X, Y, three coordinates of Z and an angle θ, the coordinate setting range is respectively-15mm ~ 15mm, and precision is 0.01mm, and system of coordinates as shown in fig. 1, angle θ setting range is respectively 0 degree ~ 70 degree, precision is 0.5 degree, and regulation be a negative value clockwise, counterclockwise be on the occasion of;
The flow of described burners set is controlled by flow controlling unit, and the flow of each blowtorch that burners set comprises can both come independent control by matter under meter (MFC) separately.
The agglomerating plant of described optical fiber prefabricated rod mandrel mother metal, porous glass preform rod comprises sintering gas supply section, and prefabricated rods rotates and upgrades portion and sintering oven.Wherein sintering gas supply section comprises the intravital air intake in straight-through sintering oven chamber, the control unit of gas flow; Prefabricated rods rotates and upgrades portion and is made up of prefabricated rods rotating servo motor, prefabricated rods rotation drive lead screw, drive lead screw nut and prefabricated rods sintering suspension rod.
Described prefabricated rods sintering suspension rod can move up and down, and translational speed is by the determining positions of core rod base metal lower surface; Also can be along being rotated counterclockwise, speed of rotation is fixed, and is 10r/min～30r/min, and favor speed is 20r/min～25r/min, and the action of prefabricated rods suspension rod is controlled by PLC, and the prefabricated rods rotating servo motor is carried out.
Described air intake is connected with the control unit of sintering gas flow, and the connection evaporating pot comes gasified liquid.
The control of described gas flow is controlled by flow controlling unit, and the flow of all gases all comes independent control by separately matter under meter (MFC).
The main difficult point of preparation porous glass preform rod:
A. deposition blowlamp by move left and right with SiO
2Powder deposition is to plug, when moving to powder rod two ends, deposition blowlamp can make rod generation stress rod being produced calcination, intensity reduces, increase along with powder rod diameter, soot preforms weight increases, the shearing force that rod is subjected to increases, so higher excellent fracture probability in the deposition process, can affect to qualification rate;
B. along with the increase of powder rod diameter, keeping under the certain prerequisite of chuck speed of rotation, the linear velocity of powder rod outside surface can improve gradually, and flame can reduce relatively to the torch firing time of powder, thereby cause the density of soot preforms to reduce, in the deposition process rimose can take place may.
Counter-measure:
A. improve intensity by increasing the caudal peduncle diameter, quartzy caudal peduncle strength formula is calculated as follows:
P=8FL/D
3
In the formula: P-bending strength, MPa;
F-ultimate load power, N;
Distance between L-fulcrum, m;
The diameter of D-bar, m.
By following formula as can be known the bending strength of quartzy caudal peduncle be directly proportional with the cube of its diameter, therefore increasing the caudal peduncle diameter improves a lot to its intensity, the size of caudal peduncle diameter has direct influence to follow-up powder rod sintering circuit, and therefore the diameter with quartzy caudal peduncle increases to 45mm from 32mm.Because the existence of stress can cause quartzy caudal peduncle intensity to reduce, therefore the stress that reduces caudal peduncle also is one of effective measure that effectively solve its fracture, the strain temperature interval of caudal peduncle is 950 ℃-1050 ℃, therefore the annealing temperature interval is 1050 ℃-1150 ℃, reduces the stress that in its deposition process caudal peduncle caused by deposition blowlamp at the hydrogen in each stage and oxygen flow.
B. the density of powder rod and its depositing temperature are proportional, and the present invention is by increasing the blowtorch hydrogen flowing quantity, thereby have guaranteed that soot preforms density prolongs the radial consistence, and test-results shows that it is not easy to crack after powder rod density reaches more than the 0.8g/cm3.
The ultralow water peak fiber prefabricated stick producing method of a kind of complete synthesis oversize method, can take following steps to realize:
1, the low core bag of preparation is than plug powder rod: adjust each blowtorch in the burners set the position and in the flow of each composition, make to increase optics covering density and sandwich layer diameter under the constant situation of powder core rod base metal diameter;
Described burners set comprises three blowtorch, is divided into c blowtorch, b blowtorch, a blowtorch, and wherein the effusive raw material of c blowtorch is silicon tetrachloride (SiCl
4), germanium tetrachloride (GeCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar), the sandwich layer part of deposition core rod base metal, wherein silicon tetrachloride (SiCl
4) flow range be 0 ~ 30g/min, preferable range is 10 ~ 20g/min, germanium tetrachloride (GeCl
4) flow range be 0 ~ 20mg/min, preferable range is 5 ~ 15mg/min, hydrogen (H
2) flow range be 0 ~ 50L/min, oxygen (O
2) flow range be 0 ~ 100L/min, the flow range of argon gas (Ar) is 0 ~ 50L/min; B blowtorch and a blowtorch then deposit the optics clad section of plug, and effusive raw material is silicon tetrachloride (SiCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar), wherein silicon tetrachloride (SiCl
4) flow range be 0 ~ 100g/min, hydrogen (H
2) flow range be 0 ~ 150L/min, oxygen (O
2) flow range be 0 ~ 200L/min, the flow range of argon gas (Ar) is 0 ~ 50L/min;
The position of described burners set is by the base adjustment of blowtorch, can four-dimensionally adjust, comprise X, Y, three coordinates of Z and an angle θ, the coordinate setting range is respectively-15mm ~ 15mm, and precision is 0.01mm, and system of coordinates as shown in fig. 1, angle θ setting range is respectively 0 degree ~ 70 degree, precision is 0.5 degree, and regulation be a negative value clockwise, counterclockwise be on the occasion of;
Can under the situation that guarantees certain powder rod rod footpath, obtain thicker transparent plug like this;
2, plug powder rod vitrifying: in sintering oven, use chlorine (Cl
2) remove wherein hydroxyl (-OH), again with deuterium gas (D
2) fill up free siloxane bond (Si-O) in the powder rod, use all bubbles in helium (He) the removal powder rod at last, make the vitrifying of plug powder rod, transparence, wherein nitrogen (N
2) flow range be 0 ~ 30slpm, preferable range is 5 ~ 20slpm, chlorine (Cl
2) flow range be 0 ~ 5slpm, preferable range is 0 ~ 1slpm, the flow range of helium (He) is 0 ~ 20slpm, preferable range is 5 ~ 15slpm, deuterium gas (D
2) flow range be 0 ~ 10 slpm, preferable range is 2 ~ 5slpm, the flow of all gases will be determined according to the diameter of powder rod;
3, on horizontal lathe, feed inert nitrogen gas (N
2) and recirculated cooling water, wherein nitrogen (N
2) flow range be 0 ~ 200L/min, preferable range is 0 ~ 50L/min, temperature of cooling water remains on 20 ~ 25 ℃, graphite furnace is heated to 1950 ~ 2100 ℃, the vitreous state plug is extended to diameter 30mm-60mm, but the best is the thin plug of 45mm-50mm, and it is fixed that occurrence needs to come according to the rod footpath that will prepare prefabricated rods;
4, preparation porous glass preform rod: connect rod 13, by two deposition blowlamps, 16 effusive raw material silicon tetrachloride (SiCl at the two ends of vitreum plug
4) formation deposition blowlamp flame 15, outside deposition silicon-dioxide surrounding layer at the vitreum plug, the plug that forms porous glass preform rod 14(porous glass preform rod is a vitreous state, and surrounding layer is a powdered form), wherein the effusive raw material of each blowtorch is silicon tetrachloride (SiCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar), silicon tetrachloride (SiCl
4) flow range be 0 ~ 80g/min, preferable range is 30 ~ 50L/min, hydrogen (H
2) flow range be 0 ~ 200L/min, oxygen (O
2) flow range be 0 ~ 1100L/min, the flow range of argon gas (Ar) is 0 ~ 10L/min.In order to guarantee the ratio of fibre diameter and sandwich layer diameter, core bag ratio is more little, and surrounding layer needs sedimentary volume big more, and the prefabricated rods rod footpath that obtains at last is just big more; Described core bag is than difference and sandwich layer diameter ratio for optics covering and sandwich layer diameter, and the core bag is than between 2.5 ~ 4.5;
5, prefabricated rods moulding: in sintering oven, use chlorine (Cl
2) remove the porous glass preform rod hydroxyl (-OH), again with deuterium gas (D
2) fill up free siloxane bond (Si-O) in the powder rod, use all bubbles in helium (He) the removal powder rod again, make its vitrifying, transparence, become the vitreous state prefabricated rods, vitreous state prefabricated rods diameter is promptly made the ultralow water peak fiber prefabricated rods of complete synthesis oversize greater than 150mm.
Nitrogen (N wherein
2) flow range be 0 ~ 50slpm, preferable range is 5 ~ 30slpm, chlorine (Cl
2) flow range be 0 ~ 5slpm, preferable range is 0 ~ 1slpm, the flow range of helium (He) is 0 ~ 25slpm, preferable range is 5 ~ 20slpm, deuterium gas (D
2) flow range be 0 ~ 15 slpm, preferable range is 2 ~ 8slpm, the flow of all gases will be determined according to the diameter of powder rod;
The ultralow water peak fiber prefabricated rods of the complete synthesis oversize of the utility model producing apparatus has three advantages: the one, and it is fairly simple that the required plug of oversize prefabricated rods prepares implementation method, need not transform equipment such as cavity and cavity, the position and the flow that only need to adjust burners set can be realized; The 2nd, by many deuterium gas disposal processes in the sintering process, can effectively prevent moisture and hydroxyl (OH
-) infiltrate plug, make prefabricated rods in increased in size, also can keep low water peak value; The 3rd, the increase of prefabricated rods size effectively raises equipment and utilization ratio of raw materials, has also established solid basis for the raising of follow-up optical fiber wire-drawing equipment efficient.
The preform of the ultralow water peak fiber prefabricated rods of the complete synthesis oversize of the utility model producing apparatus production has that production efficiency height, speed are fast, the prefabricated rods size is big, the water peak is low, stable processing technique and low cost and other advantages.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified:
Fig. 1 is the deposition apparatus synoptic diagram of the ultralow water peak fiber prefabricated rods of the complete synthesis oversize of the utility model producing apparatus.
Fig. 2 is the core rod base metal of the ultralow water peak fiber prefabricated rods of the complete synthesis oversize of the utility model producing apparatus, the agglomerating plant synoptic diagram of porous glass preform rod.
Fig. 3 is a preform OVD outsourcing deposition synoptic diagram of the present utility model.
Among the figure: 1, deposition suspension rod, 2, the target rod, 3, cavity, 4, spherical cavity, 5, soot preforms, 6, burners set, 7, wind-supplying mouth, 8, laser apparatus, 9, the sintering suspension rod, 10, quartzy cavity, 11, plug powder rod, 12, the gas inlet, 13, rod, 14, porous glass preform rod, 15, deposition blowlamp flame, 16, deposition blowlamp.
Embodiment
With reference to accompanying drawing 1～3, the ultralow water peak fiber prefabricated rods of a kind of complete synthesis oversize producing apparatus comprises the agglomerating plant of a kind of deposition apparatus of optical fiber prefabricated rod mandrel mother metal and optical fiber prefabricated rod mandrel mother metal, porous glass preform rod.
Manufacturing installation of the present invention comprises the agglomerating plant device of the depositing device device of core rod base metal shown in Figure 1 and core rod base metal shown in Figure 2/porous glass preform rod.
Wherein as shown in Figure 1, the deposition apparatus of optical fiber prefabricated rod mandrel mother metal: reaction cavity 4, the gas exhaust duct 7 that links to each other with spherical cavity, cavity 3, the burners set 6 of spherical cavity bottom, the fixing deposition suspension rod 1 of prefabricated rods target rod, deposition suspension rod 1 can rotate and vertically move up and down around self axis.During preparation powder core rod base metal, silica glass target rod 7 is installed on deposition suspension rod 1.
Described deposition suspension rod 1 can move up and down, and translational speed is by the determining positions of core rod base metal lower surface; Also can be along being rotated counterclockwise, speed of rotation is fixed, and is 5r/min～30r/min, and (favor speed is that 15r/min～25r/min), the action of deposition suspension rod is controlled by PLC, and servomotor is carried out;
Described burners set comprises three blowtorch, is divided into c blowtorch, b blowtorch, a blowtorch, and wherein the effusive raw material of c blowtorch is silicon tetrachloride (SiCl
4), germanium tetrachloride (GeCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar), the sandwich layer part of deposition core rod base metal, wherein silicon tetrachloride (SiCl
4) flow range be 0 ~ 30g/min, preferable range is 10 ~ 20g/min, germanium tetrachloride (GeCl
4) flow range be 0 ~ 20mg/min, preferable range is 5 ~ 15mg/min, hydrogen (H
2) flow range be 0 ~ 50L/min, oxygen (O
2) flow range be 0 ~ 100L/min, the flow range of argon gas (Ar) is 0 ~ 50L/min; B blowtorch and a blowtorch then deposit the optics clad section of plug, and effusive raw material is silicon tetrachloride (SiCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar), wherein silicon tetrachloride (SiCl
4) flow range be 0 ~ 100g/min, hydrogen (H
2) flow range be 0 ~ 150L/min, oxygen (O
2) flow range be 0 ~ 200L/min, the flow range of argon gas (Ar) is 0 ~ 50L/min.
The position of described burners set is by the base adjustment of blowtorch, can four-dimensionally adjust, comprise X, Y, three coordinates of Z and an angle θ, the coordinate setting range is respectively-15mm ~ 15mm, and precision is 0.01mm, and system of coordinates as shown in fig. 1, angle θ setting range is respectively 0 degree ~ 70 degree, precision is 0.5 degree, and regulation be a negative value clockwise, counterclockwise be on the occasion of;
The flow of described burners set is controlled by flow controlling unit, and the flow of each blowtorch that burners set comprises can both come independent control by matter under meter (MFC) separately.
As shown in Figure 2, the agglomerating plant of described optical fiber prefabricated rod mandrel mother metal, porous glass preform rod comprises sintering gas supply section, and prefabricated rods rotates and upgrades portion and sintering oven.Wherein sintering gas supply section comprises the air intake 12 in the quartzy cavity 10 of straight-through sintering oven, the control unit of gas flow; Prefabricated rods rotates and upgrades portion and is made up of prefabricated rods rotating servo motor, prefabricated rods rotation drive lead screw, drive lead screw nut and prefabricated rods sintering suspension rod 9.Sintering oven has the quartzy cavity 10 of sintering oven, and the quartzy cavity 10 of sintering oven is provided with air intake 12.
Described prefabricated rods sintering suspension rod 9 can move up and down, and translational speed is by the determining positions of core rod base metal lower surface; Also can be along being rotated counterclockwise, speed of rotation is fixed, and is 10r/min～30r/min, and (favor speed is that 20r/min～25r/min), the action of prefabricated rods sintering suspension rod is controlled by PLC, and the prefabricated rods rotating servo motor is carried out.
Described air intake is connected with the control unit of sintering gas flow, and the connection evaporating pot comes gasified liquid.
The control of described gas flow is controlled by flow controlling unit, and the flow of each blowtorch that burners set comprises can both come independent control by matter under meter (MFC) separately.Nitrogen (N wherein
2) flow range be 0 ~ 30slpm, preferable range is 5 ~ 20slpm, chlorine (Cl
2) flow range be 0 ~ 5slpm, preferable range is 0 ~ 1slpm, the flow range of helium (He) is 0 ~ 20slpm, preferable range is 5 ~ 15slpm, deuterium gas (D
2) flow range be 0 ~ 10 slpm, preferable range is 2 ~ 5slpm.
The ultralow water peak fiber prefabricated rods of a kind of complete synthesis oversize preparation method, can take following steps to realize:
1, the low core bag of preparation is than plug powder rod: adjust each blowtorch in the burners set the position and in the flow of each composition, make to increase optics covering density and sandwich layer diameter under the constant situation of powder core rod base metal diameter;
Described burners set comprises three blowtorch, is divided into c blowtorch, b blowtorch, a blowtorch, and wherein the effusive raw material of c blowtorch is silicon tetrachloride (SiCl
4), germanium tetrachloride (GeCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar), the sandwich layer part of deposition core rod base metal, wherein silicon tetrachloride (SiCl
4) flow range be 0 ~ 30g/min, preferable range is 10 ~ 20g/min, germanium tetrachloride (GeCl
4) flow range be 0 ~ 20mg/min, preferable range is 5 ~ 15mg/min, hydrogen (H
2) flow range be 0 ~ 50L/min, oxygen (O
2) flow range be 0 ~ 100L/min, the flow range of argon gas (Ar) is 0 ~ 50L/min; B blowtorch and a blowtorch then deposit the optics clad section of plug, and effusive raw material is silicon tetrachloride (SiCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar), wherein silicon tetrachloride (SiCl
4) flow range be 0 ~ 100g/min, hydrogen (H
2) flow range be 0 ~ 150L/min, oxygen (O
2) flow range be 0 ~ 200L/min, the flow range of argon gas (Ar) is 0 ~ 50L/min;
The position of described burners set is by the base adjustment of blowtorch, can four-dimensionally adjust, comprise X, Y, three coordinates of Z and an angle θ, the coordinate setting range is respectively-15mm ~ 15mm, and precision is 0.01mm, and system of coordinates as shown in fig. 1, angle θ setting range is respectively 0 degree ~ 70 degree, precision is 0.5 degree, and regulation be a negative value clockwise, counterclockwise be on the occasion of;
Can under the situation that guarantees certain powder rod rod footpath, obtain thicker transparent plug like this;
2, plug powder rod vitrifying: in sintering oven, use chlorine (Cl
2) remove wherein hydroxyl (-OH), again with deuterium gas (D
2) fill up free siloxane bond (Si-O) in the powder rod, use all bubbles in helium (He) the removal powder rod at last, make the vitrifying of plug powder rod, transparence, wherein nitrogen (N
2) flow range be 0 ~ 30slpm, preferable range is 5 ~ 20slpm, chlorine (Cl
2) flow range be 0 ~ 5slpm, preferable range is 0 ~ 1slpm, the flow range of helium (He) is 0 ~ 20slpm, preferable range is 5 ~ 15slpm, deuterium gas (D
2) flow range be 0 ~ 10 slpm, preferable range is 2 ~ 5slpm, the flow of all gases will be determined according to the diameter of powder rod;
3, on horizontal lathe, feed inert nitrogen gas (N
2) and recirculated cooling water, wherein nitrogen (N
2) flow range be 0 ~ 200L/min, preferable range is 0 ~ 50L/min, temperature of cooling water remains on 20 ~ 25 ℃, graphite furnace is heated to 1950 ~ 2100 ℃, the vitreous state plug is extended to diameter 30mm-60mm, but the best is the thin plug of 45mm-50mm, and it is fixed that occurrence needs to come according to the rod footpath that will prepare prefabricated rods;
4, preparation porous glass preform rod: connect rod 13, by two deposition blowlamps, 16 effusive raw material silicon tetrachloride (SiCl at the two ends of vitreum plug
4) formation deposition blowlamp flame 15, outside deposition silicon-dioxide surrounding layer at the vitreum plug, the plug that forms porous glass preform rod 14(porous glass preform rod is a vitreous state, and surrounding layer is a powdered form), wherein the effusive raw material of each blowtorch is silicon tetrachloride (SiCl
4), combustion gases are hydrogen (H
2), oxygen (O
2), current-carrying gas is argon gas (Ar), silicon tetrachloride (SiCl
4) flow range be 0 ~ 80g/min, preferable range is 30 ~ 50L/min, hydrogen (H
2) flow range be 0 ~ 200L/min, oxygen (O
2) flow range be 0 ~ 1100L/min, the flow range of argon gas (Ar) is 0 ~ 10L/min.In order to guarantee the ratio of fibre diameter and sandwich layer diameter, core bag ratio is more little, and surrounding layer needs sedimentary volume big more, and the prefabricated rods rod footpath that obtains at last is just big more; Described core bag is than difference and sandwich layer diameter ratio for optics covering and sandwich layer diameter, and the core bag is than between 2.5 ~ 4.5;
5, prefabricated rods moulding: in sintering oven, use chlorine (Cl
2) remove the porous glass preform rod hydroxyl (-OH), again with deuterium gas (D
2) fill up free siloxane bond (Si-O) in the powder rod, use all bubbles in helium (He) the removal powder rod again, make its vitrifying, transparence, become the vitreous state prefabricated rods, vitreous state prefabricated rods diameter is promptly made the ultralow water peak fiber prefabricated rods of complete synthesis oversize greater than 150mm.Nitrogen (N wherein
2) flow range be 0 ~ 50slpm, preferable range is 5 ~ 30slpm, chlorine (Cl
2) flow range be 0 ~ 5slpm, preferable range is 0 ~ 1slpm, the flow range of helium (He) is 0 ~ 25slpm, preferable range is 5 ~ 20slpm, deuterium gas (D
2) flow range be 0 ~ 15 slpm, preferable range is 2 ~ 8slpm, the flow of all gases will be determined according to the diameter of powder rod;
The utility model is described in further detail below in conjunction with embodiment:
Embodiment one:
1, preparation prefabricated rods mother metal
Adopt the female rod of VAD prepared optical fiber prefabricated rod mandrel as shown in Figure 1, target rod 2 is fixing by deposition suspension rod 1, and drop to specified location (laser that laser apparatus 8 sends is just in time beaten in target rod 2 lower edges), the coordinate of burners set 6 and each composition flow parameter are provided with as following table:
Under above-mentioned processing parameter, having made diameter is the powder plug of 242mm.
2, preparation preform vitrifying plug
Adopt agglomerating plant as shown in Figure 2 to prepare preform vitrifying plug, plug powder rod 11 is fixing by sintering suspension rod 9, and drops to specified location, and each stage parameter of sintering is provided with as following table, all will feed inert nitrogen gas (N in the whole process of sintering
2), the fs is used chlorine (Cl
2) remove hydroxyl in the powder rod (-OH), subordinate phase is removed bubble in the powder rod with helium (He), the phase III is with deuterium gas (D
2) fill up free siloxane bond (Si-O) in the powder rod, the quadravalence section is with chlorine (Cl
2) remove residual hydroxyl in the powder rod (-OH), five-stage is removed residual bubble in the powder rod with helium (He), makes the vitrifying of plug powder rod, transparence:
Under above-mentioned processing parameter, transparent diameter of mandrel is 130mm behind the sintering, records the core bag than 2.48.
3, on horizontal lathe, the vitreous state plug is extended to the thin plug of diameter 46mm;
4, effective deshydroxy processing method, preparation preform vitreous state prefabricated rods
The 46mm plug is become the porous glass preform rod through as shown in Figure 3 equipment at the outer deposition covering that continues of plug, adopt agglomerating plant as shown in Figure 2 to prepare preform vitreous state prefabricated rods then, that different with the 2nd step is Cl
2Flow strengthen feeding time lengthening (because sedimentary surrounding layer volume is bigger than core rod base metal volume):
The average rod of the preform that makes at last footpath is 155mm, and its drawing optical fiber is 0.28dB/km at the pad value (water peak value) at 1383nm place.
Embodiment two:
1, preparation prefabricated rods mother metal
Adopt the female rod of VAD prepared optical fiber prefabricated rod mandrel as shown in Figure 1, target rod 2 is fixing by deposition suspension rod 1, and drop to specified location (laser that laser apparatus 8 sends is just in time beaten in target rod 2 lower edges), the coordinate of burners set 6 and each composition flow parameter are provided with as following table:
Under above-mentioned processing parameter, the powder plug that has made diameter and be 245mm records the core bag than 2.6.
2, preparation preform vitrifying plug
Adopt agglomerating plant as shown in Figure 2 to prepare preform vitrifying plug, plug powder rod 11 is fixing by sintering suspension rod 9, and drops to specified location, and each stage parameter of sintering is provided with as following table, all will feed inert nitrogen gas (N in the whole process of sintering
2), the fs is used chlorine (Cl
2) remove hydroxyl in the powder rod (-OH), subordinate phase is removed bubble in the powder rod with helium (He), the phase III is with deuterium gas (D
2) fill up free siloxane bond (Si-O) in the powder rod, the quadravalence section is with chlorine (Cl
2) remove residual hydroxyl in the powder rod (-OH), five-stage is removed residual bubble in the powder rod with helium (He), makes the vitrifying of plug powder rod, transparence:
Under above-mentioned processing parameter, transparent diameter of mandrel is 138mm behind the sintering.
3, on horizontal lathe, the vitreous state plug is extended to the thin plug of diameter 48mm;
4, effective deshydroxy processing method, preparation preform vitreous state prefabricated rods
The 48mm plug is become the porous glass preform rod through as shown in Figure 3 equipment at the outer deposition covering that continues of plug, still adopt agglomerating plant as shown in Figure 2 to prepare preform vitreous state prefabricated rods then, that different with the 2nd step is Cl
2Flow strengthen feeding time lengthening (because sedimentary surrounding layer volume ratio core rod base metal volume is big):
The average rod of the preform that makes at last footpath is 185mm, and its drawing optical fiber is 0.268dB/km at the median of the pad value (water peak value) at 1383nm place.
Claims (3)
1. the ultralow water peak fiber prefabricated rods of complete synthesis oversize producing apparatus is characterized in that comprising the agglomerating plant of a kind of deposition apparatus of optical fiber prefabricated rod mandrel mother metal and optical fiber prefabricated rod mandrel mother metal, porous glass preform rod;
The deposition apparatus of described optical fiber prefabricated rod mandrel mother metal comprises the gas supply section, rotates and upgrades part, control section, and wherein gas supply department comprises the control unit of burners set and control blowtorch flow; The portion that rotates and upgrades is made up of servomotor, drive lead screw, feed screw nut and deposition suspension rod; Control part is made up of position measurement instrument and PLC;
Described deposition suspension rod can move up and down, and translational speed is by the determining positions of core rod base metal lower surface; Also can be along being rotated counterclockwise, speed of rotation is 5r/min～30r/min, and the action of deposition suspension rod is controlled by PLC, and servomotor is carried out;
Described burners set comprises three blowtorch, be divided into c blowtorch, b blowtorch, a blowtorch, wherein the effusive raw material of c blowtorch is silicon tetrachloride, germanium tetrachloride, and combustion gases are hydrogen, oxygen, and current-carrying gas is an argon gas, the sandwich layer part of deposition core rod base metal, wherein the flow range of silicon tetrachloride is 0 ~ 30g/min, and the flow range of germanium tetrachloride is 0 ~ 20mg/min, and the flow range of hydrogen is 0 ~ 50L/min, the flow range of oxygen is 0 ~ 100L/min, and the flow range of argon gas is 0 ~ 50L/min; B blowtorch and a blowtorch then deposit the optics clad section of plug, effusive raw material is a silicon tetrachloride, combustion gases are hydrogen, oxygen, current-carrying gas is an argon gas, wherein the flow range of silicon tetrachloride is 0 ~ 100g/min, the flow range of hydrogen is 0 ~ 150L/min, and the flow range of oxygen is 0 ~ 200L/min, and the flow range of argon gas is 0 ~ 50L/min;
The agglomerating plant of described optical fiber prefabricated rod mandrel mother metal, porous glass preform rod comprises sintering gas supply section, and prefabricated rods rotates and upgrades portion and sintering oven; Wherein sintering gas supply section comprises the control unit of the intravital air intake in the quartzy chamber of straight-through sintering oven, sintering gas flow; Prefabricated rods rotates and upgrades portion and is made up of prefabricated rods rotating servo motor, prefabricated rods rotation drive lead screw, drive lead screw nut and prefabricated rods sintering suspension rod; Sintering oven has the quartzy cavity of sintering oven, and the quartzy cavity of sintering oven is provided with air intake;
Described prefabricated rods sintering suspension rod can move up and down, and translational speed is by the determining positions of core rod base metal lower surface; Also along being rotated counterclockwise, speed of rotation is 10r/min～30r/min, and the action of prefabricated rods sintering suspension rod is controlled by PLC, and the prefabricated rods rotating servo motor is carried out;
Described air intake is connected with the control unit of sintering gas flow, and the connection evaporating pot comes gasified liquid;
The control of described sintering gas flow is controlled by flow controlling unit, the flow of all gases all comes independent control by separately matter under meter, wherein the flow range of nitrogen is 0 ~ 30slpm, the flow range of chlorine is 0 ~ 5slpm, the flow range of helium is 0 ~ 20slpm, and the flow range of deuterium gas is 0 ~ 10 slpm.
2. the ultralow water peak fiber prefabricated rods of a kind of complete synthesis oversize according to claim 1 producing apparatus, it is characterized in that of the base adjustment of the position of described burners set by blowtorch, can four-dimensionally adjust, comprise X, Y, three coordinates of Z and an angle θ, the coordinate setting range is respectively-15mm ~ 15mm, and precision is 0.01mm, angle θ setting range is respectively 0 degree ~ 70 degree, precision is 0.5 degree, and regulation be a negative value clockwise, counterclockwise be on the occasion of.
3. the ultralow water peak fiber prefabricated rods of a kind of complete synthesis oversize according to claim 1 producing apparatus is characterized in that the flow of described burners set is controlled by flow controlling unit, and the flow of each blowtorch that burners set comprises can both independent control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120078881 CN202022852U (en) | 2011-03-23 | 2011-03-23 | Total synthesis oversize ultra-low-water-peak optical fiber preform manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120078881 CN202022852U (en) | 2011-03-23 | 2011-03-23 | Total synthesis oversize ultra-low-water-peak optical fiber preform manufacturing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202022852U true CN202022852U (en) | 2011-11-02 |
Family
ID=44847812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120078881 Expired - Lifetime CN202022852U (en) | 2011-03-23 | 2011-03-23 | Total synthesis oversize ultra-low-water-peak optical fiber preform manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202022852U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173572A (en) * | 2011-03-23 | 2011-09-07 | 中天科技精密材料有限公司 | Method and equipment for manufacturing fully-synthesized oversize ultralow water peak optical fiber preform |
| CN116234779A (en) * | 2020-10-19 | 2023-06-06 | 江苏亨通光纤科技有限公司 | Preparation device and method of optical fiber preform |
-
2011
- 2011-03-23 CN CN 201120078881 patent/CN202022852U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173572A (en) * | 2011-03-23 | 2011-09-07 | 中天科技精密材料有限公司 | Method and equipment for manufacturing fully-synthesized oversize ultralow water peak optical fiber preform |
| CN116234779A (en) * | 2020-10-19 | 2023-06-06 | 江苏亨通光纤科技有限公司 | Preparation device and method of optical fiber preform |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102173572B (en) | Method and equipment for manufacturing fully-synthesized oversize ultralow water peak optical fiber preform | |
| CN111694088B (en) | Single-mode optical fiber and preparation method thereof | |
| CN102249533B (en) | Method for manufacturing large-size low-water-peak prefabricated rod | |
| CN109665713B (en) | Low water peak large-size optical fiber preform and manufacturing method thereof | |
| CN109553295B (en) | Large-size low-loss optical fiber preform and manufacturing method thereof | |
| CN102730961B (en) | Device and method for preparing large-size bend insensitive fiber preform | |
| CN103553320A (en) | Quartz sleeve for large-size optical fiber perform, and manufacturing method thereof | |
| CN102757179A (en) | Method for preparing large-size optical fiber preform | |
| CN102320732A (en) | Method for preparing optical fiber preform rod | |
| CN104402213A (en) | Pure silicon dioxide loose body vitrification fluorine doping method | |
| CN102149648B (en) | Process for producing optical-fiber base material | |
| CN103663958A (en) | Method for preparing low water peak optical fiber preform | |
| CN114994830A (en) | Low-loss bending-resistant single-mode optical fiber and manufacturing method thereof | |
| WO2014119415A1 (en) | Process for producing glass base and optical fiber | |
| CN202022852U (en) | Total synthesis oversize ultra-low-water-peak optical fiber preform manufacturing equipment | |
| CN202912848U (en) | Device for manufacturing large-size bend insensitive fiber preform rod | |
| CN103760634A (en) | Single mode fiber | |
| CN1472150A (en) | Method for producing fibre-optical precast stick | |
| JP5046500B2 (en) | Manufacturing method of glass preform for optical fiber | |
| CN106277744A (en) | A kind of high deposition rate PCVD technique makes the method for single-mode fiber plug | |
| CN103864291B (en) | A kind of single-mode fiber prefabricated rods and preparation method thereof | |
| CN101066834A (en) | Process of preparing fiber preformrod | |
| CN107056042B (en) | Blowtorch of optical fiber preform | |
| CN113461322B (en) | Optical fiber and method for manufacturing optical fiber preform | |
| CN102503114B (en) | Device and method for manufacturing quartz core rod for optical fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111102 Effective date of abandoning: 20130703 |
|
| RGAV | Abandon patent right to avoid regrant |