CN113772945B - Device and method for preparing soft glass optical fiber preform - Google Patents
Device and method for preparing soft glass optical fiber preform Download PDFInfo
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- CN113772945B CN113772945B CN202111270986.0A CN202111270986A CN113772945B CN 113772945 B CN113772945 B CN 113772945B CN 202111270986 A CN202111270986 A CN 202111270986A CN 113772945 B CN113772945 B CN 113772945B
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- 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
- C03B37/01265—Manufacture of preforms for drawing fibres or filaments starting entirely or partially from molten glass, e.g. by dipping a preform in a melt
- C03B37/01268—Manufacture of preforms for drawing fibres or filaments starting entirely or partially from molten glass, e.g. by dipping a preform in a melt by casting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The invention discloses a preparation device and a preparation method of a soft glass optical fiber preform, wherein the preparation device comprises an optical fiber preform molding module, a heating module, a temperature measuring module, a supporting module and a control module, is reasonable in structural arrangement, realizes the preparation of the soft glass optical fiber preform by adopting a mechanical and semi-automatic means through integrating the optical fiber preform molding module, the heating module, the temperature measuring module, the supporting module, the control module and the like, controls the feeding, the discharging and the like of the optical fiber preform molding module through electric signal communication among the heating module, the temperature measuring module and the control module, has high detection precision and strong operation connectivity, is favorable for improving the success rate of the preparation of the optical fiber preform, and has good repeatability. The invention can more accurately control the viscosity of the glass liquid and obtain the special glass optical fiber preform with higher optical quality. The invention can control the diameter of the fiber core in a smaller range, thereby improving the utilization rate of the glass optical fiber preform.
Description
Technical Field
The invention belongs to the technical field of special optical fiber preparation, relates to an optical fiber preform manufacturing technology, and particularly relates to a soft glass optical fiber preform preparation device and a preparation method.
Background
For special glasses such as tellurate glass and fluoride glass, the suction casting method is a common preparation method of optical fiber preforms. In the existing preparation method of the optical fiber preform based on the suction casting method, firstly, glass liquid is cast in a mould, the mould is quickly lifted at a proper time of glass liquid viscosity, the glass liquid at the center of the mould flows out of the mould due to the smaller viscosity, and the fiber core glass liquid above the mould flows into the center, so that the obtained optical fiber preform can avoid pollution and loss caused by external processing. However, the manual suction casting method for preparing the optical fiber preform has the disadvantages of high difficulty, low yield and low utilization rate of the prepared optical fiber preform.
Disclosure of Invention
The invention aims to provide a device and a method for preparing a soft glass optical fiber preform, which are used for solving the problems of low yield and low utilization rate of the optical fiber preform existing in the prior art.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a preparation device of a soft glass optical fiber preform, which comprises the following components:
the optical fiber preform molding module comprises an optical fiber preform mold, a first clamping groove and a second clamping groove, wherein the first clamping groove and the second clamping groove are respectively blocked at two ends of the optical fiber preform mold; one of the first clamping groove and the second clamping groove is used for containing fiber core glass liquid, and after the cladding glass liquid in the center of the optical fiber preform mold flows out, the fiber core glass liquid is filled into the optical fiber preform mold;
the heating module can heat the optical fiber preform molding module;
the temperature measuring module can monitor the heating temperature of the cladding glass liquid in the optical fiber preform mold in real time;
the support module comprises a bottom plate, a movable bracket and a bracket driving unit; the movable support is movably arranged on the bottom plate and used for mounting the optical fiber preform mold, and the other one of the first clamping groove and the second clamping groove can be detachably connected with the bottom plate; the support driving unit is connected with the movable support to drive the optical fiber preform mold to overturn and lift;
the control module is in communication connection with the heating module, the temperature measuring module and/or the bracket driving unit.
Optionally, the first clamping groove is a first funnel-shaped clamping groove, and the tip end of the first funnel-shaped clamping groove faces the inside of the optical fiber preform mold and is used for containing the fiber core glass liquid;
the second clamping groove is a second funnel-shaped clamping groove, and the tip end of the second funnel-shaped clamping groove faces the inner part of the optical fiber preform mold and can be detachably connected with the bottom plate.
Optionally, both ends of the first funnel-shaped clamping groove are all provided with openings, and the slope of the groove surface is less than 30 degrees.
Optionally, the diameter of the funnel inlet of the second funnel-shaped clamping groove is smaller than the inner diameter of the optical fiber preform mold, so that the end part of the optical fiber preform mold can be inserted into and in interference fit with the optical fiber preform mold.
Optionally, the first funnel-shaped clamping groove and the second funnel-shaped clamping groove are detachably connected with the optical fiber preform mold.
Optionally, the heating module includes:
the heating plate is arranged on the bottom plate, can heat the second funnel-shaped clamping groove and is detachably connected with the second funnel-shaped clamping groove;
and the heating sleeve is sleeved on the periphery of the optical fiber preform mould and used for heating the optical fiber preform mould.
Optionally, the heating sleeve and the heating plate are heated by resistance wires.
Optionally, the upper limit of the heating temperature of the heating sleeve and the heating plate is not lower than 600 ℃.
Optionally, the optical fiber preform mold is a cylindrical mold, a glass liquid containing cavity is arranged in the cylindrical mold, and a section of the glass liquid containing cavity cut along the radial direction of the cylindrical mold is circular or polygonal. The polygon is triangle, quadrangle, pentagon or hexagon.
Optionally, the support module further includes a fixing bracket, and the fixing bracket is disposed on the bottom plate; the fixing support is provided with a first fixing frame so as to fix the temperature measuring module above the optical fiber preform forming module. The first fixing frame is detachably connected with the fixing support.
Optionally, the temperature measuring module is a laser temperature measuring instrument.
Optionally, the laser thermometer is detachably connected with the first fixing frame.
Optionally, the laser thermometer is aligned with the optical fiber preform mold during detection; the detection direction of the laser thermometer is perpendicular to the heating plate and the bottom plate and is coaxial with the optical fiber preform mold.
Optionally, the movable support is an inverted L-shaped support, which includes:
the vertical arm is perpendicular to the bottom plate, the top of the vertical arm is a vertical section, the bottom of the vertical arm is bent to form an arc bending section, a plurality of gear teeth are arranged on the bottom side wall of the arc bending section along the radian direction of the arc bending section, a pitching driving gear meshed with the arc bending section is arranged on the bottom plate, and the pitching driving gear is connected with the bracket driving unit;
the horizontal arm is slidably mounted on the vertical section and is perpendicular to the vertical section, and the horizontal arm can be driven by the bracket driving unit to lift.
Optionally, a second fixing frame is disposed at one end of the horizontal arm far away from the vertical section, and is used for fixedly mounting the optical fiber preform mold. The second fixing frame is detachably connected with the horizontal arm.
Optionally, the stand driving unit includes:
the pitching driving assembly comprises a first motor and a pitching driving gear, and the pitching driving gear is connected with the output end of the first motor;
the lifting driving assembly comprises a second motor, a lifting driving gear and a straight rack, the lifting driving gear is rotatably arranged on the vertical section, and the lifting driving gear is connected with the output end of the second motor; the straight rack is fixedly arranged on the horizontal arm, and is meshed with the lifting driving gear.
Optionally, the horizontal arm is perpendicular to the plane where the vertical arm is located, and when the arc bending section of the vertical arm rotates, the optical fiber preform mold on the horizontal arm can be driven to incline relative to the bottom plate, and the inclination angle is 45-55 degrees.
Optionally, the first motor, the second motor, the inverted L-shaped bracket and the heating plate are all detachably connected with the bottom plate.
Meanwhile, the invention provides a preparation method of the soft glass optical fiber preform, which is carried out by adopting the preparation device of the soft glass optical fiber preform and comprises the following steps:
presetting the heating temperature of the optical fiber preform molding module and the feedback temperature of the temperature measuring module through the control module;
starting the heating module to heat the optical fiber preform molding module;
heating the optical fiber preform forming module to a preset heating temperature, and then introducing cladding glass liquid into the optical fiber preform die;
introducing a core glass liquid into one of the first and second clamping grooves;
fixing the other one of the first clamping groove and the second clamping groove with the bottom plate;
and adopting the temperature measuring module to measure the temperature of the cladding glass liquid in the optical fiber preform mold, and driving the optical fiber preform mold to move through the bracket driving unit when the measured temperature reaches a preset feedback temperature, so that the optical fiber preform mold is separated from the first clamping groove or the second clamping groove fixed with the bottom plate, the cladding glass liquid in the center of the optical fiber preform mold flows out, and meanwhile, the fiber core glass liquid is filled into the optical fiber preform mold.
Optionally, the upper limit of the heating temperature of the heating module is not lower than 600 ℃;
the detection temperature range of the temperature measuring module is 250-700 ℃.
Compared with the prior art, the invention has the following technical effects:
the soft glass optical fiber preform preparation device provided by the invention has reasonable structural arrangement, realizes the preparation of the soft glass optical fiber preform by adopting a mechanical and semi-automatic means through integrating the optical fiber preform forming module, the heating module, the temperature measuring module, the supporting module, the control module and the like, controls the feeding, the discharging and the like of the optical fiber preform forming module through the electric signal communication among the heating module, the temperature measuring module and the control module, has high detection precision and strong operation connection, is favorable for improving the success rate of the preparation of the optical fiber preform, and has good repeatability.
The device and the method for preparing the soft glass optical fiber preform can more accurately control the viscosity of glass liquid and obtain the special glass optical fiber preform with higher optical quality.
The device and the method for preparing the soft glass optical fiber preform can control the diameter of the fiber core in a smaller range, thereby improving the utilization rate of the glass optical fiber preform.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a device for preparing a soft glass optical fiber preform according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a vertical arm in a mobile bracket according to an embodiment of the present invention.
Wherein, the reference numerals are as follows: 100. a soft glass optical fiber preform preparation device; 1. a bottom plate; 2. a heating plate; 3. a second clamping groove; 4. a fixed bracket; 5. a heating jacket; 6. the second fixing frame; 7. an optical fiber preform mold; 8. a laser thermometer; 9. a first fixing frame; 10. a first clamping groove; 11. a movable bracket; 111. a horizontal arm; 112. a vertical arm; 1121. a vertical section; 1122. a curved arc segment; 1123. gear teeth; 12. a first motor; 13. a second motor; 14. a pitch drive gear; 15. a lifting driving gear; 16. a spur rack.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a device for preparing a soft glass optical fiber preform, which solves the problems of low yield and low utilization rate of the optical fiber preform existing in the prior art.
Still another object of the present invention is to provide a method for manufacturing a soft glass optical fiber preform based on the above-mentioned apparatus for manufacturing a soft glass optical fiber preform.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1-2, the present embodiment provides a soft glass optical fiber preform manufacturing apparatus 100, which mainly comprises an optical fiber preform molding module, a heating module, a temperature measuring module, a supporting module, a control module, and the like. The optical fiber preform molding module comprises an optical fiber preform mold 7, a first clamping groove 10 and a second clamping groove 3, wherein the first clamping groove 10 and the second clamping groove 3 are respectively blocked at two ends of the optical fiber preform mold 7; one of the first clamping groove 10 and the second clamping groove 3 is used for containing fiber core glass liquid, and after the cladding glass liquid in the center of the optical fiber preform mold 7 flows out, the fiber core glass liquid is filled into the optical fiber preform mold 7, and the other one can be detachably connected with the bottom plate 1. The heating module can heat the optical fiber preform molding module, wherein the heating module is mainly used for heating one clamping groove which is detachably connected with the bottom plate 1 in the optical fiber preform mold 7 and the first clamping groove 10 and the second clamping groove 3, so as to provide a warm condition for tackifying glass liquid. The temperature measuring module can monitor the heating temperature of cladding glass liquid in the optical fiber preform mold 7 in real time, is favorable for controlling the viscosity of the glass liquid more accurately, and obtains the special glass optical fiber preform with higher optical quality. The support module comprises a bottom plate 1, a movable bracket and a bracket driving unit; the movable support is movably arranged on the bottom plate 1 and is used for installing the optical fiber preform mold 7, the support driving unit is connected with the movable support so as to drive the optical fiber preform mold 7 to overturn and lift, the optical fiber preform mold 7 is overturned and is mainly used for filling cladding glass liquid into the mold, the optical fiber preform mold 7 is lifted up and lifted up so as to be separated from the first clamping groove 10 or the second clamping groove 3 connected with the bottom plate 1, the cladding glass liquid in the center of the optical fiber preform mold 7 flows out, and meanwhile, the second clamping groove 3 or the fiber core glass liquid in the first clamping groove 10 is filled into the optical fiber preform mold 7. The control module is in communication connection with at least one of the heating module, the temperature measuring module and the bracket driving unit, and preferably the heating module, the temperature measuring module and the bracket driving unit are all in communication connection with the control module, and signals of other modules are received and transmitted through the control module, so that the automatic intelligent operation of the whole preparation device is realized, and the purpose of preparing the soft glass optical fiber preform by adopting mechanical and semi-automatic means is realized.
In this embodiment, the first clamping groove 10 is a first funnel-shaped clamping groove, that is, the first clamping groove 10 is integrally funnel-shaped, and its tip is disposed towards the inside of the optical fiber preform mold 7, and in the preparation process, it is located at the top or obliquely above the optical fiber preform mold 7 for containing the core glass liquid. The second clamping groove 3 is a second funnel-shaped clamping groove, that is, the whole second clamping groove 3 is funnel-shaped, the tip (small end) of the second clamping groove is also arranged towards the inside of the optical fiber preform mold 7, the second clamping groove 3 and the first clamping groove 10 are in a state of being arranged opposite to the tip, in the actual operation process, the second clamping groove 3 is positioned at the bottom or obliquely below the optical fiber preform mold 7, and the large end of the second clamping groove can be detachably connected with the bottom plate 1 through the modes of bolting, buckling connection and the like.
In this embodiment, the first funnel-shaped clamping groove, that is, the first clamping groove 10 is used as a structure for holding the glass fiber core, two ends of the first funnel-shaped clamping groove are opened, before the glass fiber core glass at the center of the optical fiber preform mold 7 is not discharged, the first clamping groove 10 is located above the optical fiber preform mold 7, the glass fiber core glass in the first funnel-shaped clamping groove is not discharged from the tip outlet in the state that the glass fiber core in the first funnel-shaped clamping groove is full of the glass fiber core glass in the optical fiber preform mold 7, and after the optical fiber preform mold 7 is separated from the second clamping groove 3 at the bottom of the first funnel-shaped clamping groove, the glass fiber core glass in the first clamping groove 10 is filled into the optical fiber preform mold 7 along the tip outlet in the process of discharging the glass fiber core glass at the center of the optical fiber preform mold 7. Preferably, the slope of the groove surface of the first clamping groove 10 is smaller than 30 degrees, namely, the slope of the conical structure is smaller than 30 degrees. The funnel-shaped clamping groove structure can effectively reduce bubbles generated when the fiber core glass liquid is cast to the optical fiber preform mold 7.
In this embodiment, the second funnel-shaped clamping groove, that is, the second clamping groove 3 mainly plays a role of plugging the bottom of the optical fiber preform mold 7, the tip end of which is closed, and the diameter of the large end (also referred to as "funnel inlet") is smaller than the inner diameter of the optical fiber preform mold 7 so as to be inserted into and interference fit with the end of the optical fiber preform mold 7.
In this embodiment, the first funnel-shaped clamping groove and the second funnel-shaped clamping groove are both detachably connected with the optical fiber preform mold 7, and most preferably are inserted, and structures such as a sealing ring or a gasket which is beneficial to the insertion and sealing are configured between the first funnel-shaped clamping groove and the second funnel-shaped clamping groove and the inner wall of the optical fiber preform mold 7.
In this embodiment, the heating module includes a heating plate 2 and a heating sleeve 5, wherein the heating plate 2 is attached to the upper portion of the bottom plate 1, and is mainly used for heating the second funnel-shaped clamping groove (i.e. the second clamping groove 3), and can be detachably connected with the second funnel-shaped clamping groove (i.e. the second clamping groove 3). The heating sleeve 5 is sleeved on the periphery of the optical fiber preform mold 7 in a ring manner and is used for heating the optical fiber preform mold 7.
In this embodiment, the heating jacket 5 and the heating plate 2 are preferably heated by resistance wires, but the shape, the mounting position, and the heating target are different.
In this embodiment, the upper limit of the heating temperature of both the heating mantle 5 and the heating plate 2 is preferably not lower than 600 ℃.
In this embodiment, the optical fiber preform mold 7 is preferably configured as a cylindrical mold, and a glass liquid containing cavity is disposed inside the cylindrical mold, and a cross section (or referred to as a "cross section") of the glass liquid containing cavity, which is cut along a radial direction of the cylindrical mold, is a circle or a polygon, wherein the polygon may be a triangle, a quadrangle, a pentagon, a hexagon, or the like.
In this embodiment, the support module further includes a fixing bracket 4, where the fixing bracket 4 is disposed on the bottom plate 1; the fixing bracket 4 is provided with a first fixing bracket 9 for fixing the temperature measuring module above the optical fiber preform molding module. Preferably, the first fixing frame 9 may be detachably connected to the fixing bracket 4 through a bolt connection, a buckle connection, or the like.
In this embodiment, the temperature measuring module is preferably a laser thermometer 8. The laser thermometer 8 can be detachably connected with the first fixing frame 9 through bolt connection, buckle connection and the like.
In this embodiment, the laser thermometer 8 is aligned with the optical fiber preform mold 7 when detecting, that is, the detection direction of the laser thermometer 8 is perpendicular to the heating plate 2 and the bottom plate 1 and coaxial with the optical fiber preform mold 7.
In this embodiment, as shown in fig. 1 to 2, the movable bracket 11 is an inverted L-shaped bracket including a vertical arm 112 and a horizontal arm 111. The vertical arm 112 is perpendicular to the bottom plate 1, the top of the vertical arm 112 is a vertical section 1121, the bottom of the vertical arm is bent to form an arc bending section 1122, a plurality of gear teeth 1123 are arranged on the outer wall of the bottom side of the arc bending section 1122 along the radian direction of the arc bending section, a pitching driving gear 14 meshed with the arc bending section 1122 is arranged on the bottom plate 1, and the pitching driving gear 14 is connected with a bracket driving unit to drive the vertical arm 112 to rotate by taking the center of the arc bending section 1122 as the center, and the whole is mostly expressed as reciprocating pendulum (pitching). The horizontal arm 111 is slidably mounted on the vertical section 1121 and is perpendicular to the vertical section 1121 (i.e., the horizontal arm 111 is parallel to the bottom plate 1), and the horizontal arm 111 can be lifted and lowered relative to the vertical section 1121 by the driving of the stand driving unit.
In this embodiment, the end of the horizontal arm 111 remote from the vertical section 1121 is provided with a second fixing frame 6 for fixedly mounting the optical fiber preform mold 7. The second fixing frame 6 may be detachably connected to the horizontal arm 111 by a bolt connection or a snap connection.
In this embodiment, the stand driving unit includes a pitch driving assembly and a lift driving assembly. The pitching driving assembly comprises a first motor 12 and a pitching driving gear 14, the pitching driving gear 14 is connected with the output end of the first motor 12, the pitching driving gear 14 can be driven to rotate positively and negatively by the positive and negative rotation of the first motor 12, and then the arc bending section 1122 is driven to rotate positively and negatively in a short stroke and reciprocally, so that pitching of the optical fiber preform die 7 mounted on the movable support 11 is realized. The lifting driving assembly comprises a second motor 13, a lifting driving gear 15 and a straight rack 16, the lifting driving gear 15 is rotatably arranged on the vertical section 1121, and the lifting driving gear 15 is connected with the output end of the second motor 13; the straight rack 16 is fixedly arranged on the horizontal arm 111, and the straight rack 16 is meshed with the lifting driving gear 15; when the second motor 13 drives the lifting driving gear 15 to rotate in the forward and reverse directions, the optical fiber preform mold 7 can lift along with the straight racks 16. As shown in fig. 2, the pitch drive gear 14 is embedded in the base plate 1, and the pitch drive gear 14, the lift drive gear 15, the spur rack 16, and the circular arc curved section 1122 are all supported by a conventional support structure as transmission functional components.
In this embodiment, the horizontal arm 111 is perpendicular to the plane of the vertical arm 112, and the vertical arm 112 shown in fig. 2 is the left view of fig. 1. When the circular arc bending section 1122 of the vertical arm 112 rotates, it can drive the optical fiber preform mold 7 on the horizontal arm 111 to tilt (mainly tilt in the front-rear direction of the viewing angle shown in fig. 1 to form a pitching action) with respect to the base plate 1, and the tilting angle is preferably 45-55 degrees.
In this embodiment, the first motor 12, the second motor 13, the inverted L-shaped bracket as a whole, and the heating plate 2 are preferably detachably connected to the base plate 1, for example, by bolting.
In this embodiment, the control module adopts an existing data information acquisition processor, such as a single-chip microcomputer.
The embodiment also provides a preparation method of the soft glass optical fiber preform, which is carried out by adopting the preparation device 100 of the soft glass optical fiber preform, pouring molten glass into the heated optical fiber preform mold 7, and carrying out temperature measurement and lifting to obtain the optical fiber preform, wherein the main process steps are as follows:
s1, presetting the heating temperature of a heating sleeve 5 on an optical fiber preform mold 7, the heating temperature of a heating plate 2 on a second clamping groove 3 and the feedback temperature of a laser thermometer 8 in the data information acquisition processor (namely a control module);
s2, after setting corresponding temperatures, fixing the second clamping groove 3 at the bottom of the optical fiber preform mold 7 with the heating plate 2, and preheating;
s3, when the optical fiber preform mold 7 and the second clamping groove 3 reach the preset temperature in S1, loosening the second clamping groove 3 and the heating plate 2, controlling the first motor 12 to rotate, and adjusting the optical fiber preform mold 7 and the second clamping groove 3 plugged at the bottom of the optical fiber preform mold to an included angle of 45-55 degrees with the heating plate;
s4, introducing the prepared cladding glass liquid into the optical fiber preform mold 7 until the cladding glass liquid fills the optical fiber preform mold 7, and the liquid level of the cladding glass liquid reaches the position of a clamping groove (a first clamping groove 10) at the top of the optical fiber preform mold 7;
s5, pouring the prepared fiber core glass liquid into a clamping groove at the top of the optical fiber preform mould 7, namely a first clamping groove 10;
s6, controlling the first motor 12 to reversely rotate, adjusting the optical fiber preform mold 7 to be perpendicular to the heating plate 2 again, returning to the state of S2, wherein the optical fiber preform mold 7 is in a vertical state at the moment, and fixing the second clamping groove 3 at the bottom of the optical fiber preform mold 7 with the heating plate 2 again;
s7, starting a laser thermometer 8 to measure the temperature of glass liquid in the optical fiber preform mold 7, when the temperature reaches the preset feedback temperature in S1, sending a feedback signal to a data information acquisition processor (namely a control module), starting a second motor 13, vertically lifting a horizontal arm 111 together with the optical fiber preform mold 7 at a uniform speed, separating the optical fiber preform mold 7 from a second clamping groove 3 at the bottom, and enabling the glass liquid in the center of the optical fiber preform mold 7 to flow out due to the action of gravity, wherein the glass liquid in the fiber core in the first clamping groove 10 is filled into the optical fiber preform mold 7.
In the method for preparing a soft glass optical fiber preform according to the embodiment, in step S1, the preset heating temperature, feedback temperature, etc. may be adaptively adjusted according to different glass components.
In the method for preparing a soft glass optical fiber preform according to the embodiment, in step S3, the inclination angle may be adaptively adjusted according to different glass components.
In the method for manufacturing a soft glass optical fiber preform according to the present embodiment, in steps S4 and S5, T is the glass component g (glass transition temperature) is less than 480 degrees.
In step S6, the operation speed of the first motor 12 may be adaptively adjusted according to different glass components.
The method for producing the soft glass optical fiber preform according to this embodiment will be specifically described below by taking the production of a special soft glass optical fiber preform such as ZBLAN glass optical fiber preform (an optical fiber made of fluoride glass) and Te-Zn-Na glass optical fiber preform, respectively.
The preparation of the ZBLAN glass optical fiber preform mainly comprises the following steps:
s1, presetting the heating temperature of a heating sleeve 5 to an optical fiber preform mold 7 and the heating temperature of a heating plate 2 to a second clamping groove 3 at 390-400 ℃ by the data information acquisition processor (namely a control module), and presetting the feedback temperature of a laser thermometer 8 at 395 ℃;
s2, after setting corresponding temperatures, fixing the second clamping groove 3 at the bottom of the optical fiber preform mold 7 with the heating plate 2, and preheating;
s3, when the optical fiber preform mold 7 and the second clamping groove 3 reach 390-400 ℃, loosening the second clamping groove 3 and the heating plate 2, controlling the first motor 12 to rotate, and adjusting the optical fiber preform mold 7 and the second clamping groove 3 plugged at the bottom of the optical fiber preform mold to be between 50 degrees with the heating plate;
s4, introducing the prepared ZBLAN cladding glass liquid into the optical fiber preform mold 7 until the cladding glass liquid fills the optical fiber preform mold 7, and the liquid level of the cladding glass liquid reaches the position of a clamping groove (a first clamping groove 10) at the top of the optical fiber preform mold 7;
s5, pouring the prepared ZBLAN fiber core glass liquid into a clamping groove at the top of the optical fiber preform mold 7, namely a first clamping groove 10;
s6, controlling the first motor 12 to reversely rotate, adjusting the optical fiber preform mold 7 to be perpendicular to the heating plate 2 again, returning to the state of S2, wherein the optical fiber preform mold 7 is in a vertical state at the moment, and fixing the second clamping groove 3 at the bottom of the optical fiber preform mold 7 with the heating plate 2 again;
s7, starting a laser thermometer 8 to measure the temperature of glass liquid in the optical fiber preform mold 7, when the temperature of the glass liquid is detected to be reduced to 395 ℃, the laser thermometer 8 sends a feedback signal to a data information acquisition processor (namely a control module), a second motor 13 is started to vertically lift the horizontal arm 111 together with the optical fiber preform mold 7 at a constant speed, the optical fiber preform mold 7 is separated from the second clamping groove 3 at the bottom, the ZBLAN cladding glass liquid in the center of the optical fiber preform mold 7 flows out due to the action of gravity, and the ZBLAN core glass liquid in the first clamping groove 10 is filled into the optical fiber preform mold 7 immediately.
(II) the preparation of Te-Zn-Na glass optical fiber preform rod mainly comprises the following steps:
s1, presetting the heating temperature of a heating sleeve 5 to an optical fiber preform mold 7 and the heating temperature of a heating plate 2 to a second clamping groove 3 at 420-450 ℃ by the data information acquisition processor (namely a control module), and presetting the feedback temperature of a laser thermometer 8 at 430 ℃;
s2, after setting corresponding temperatures, fixing the second clamping groove 3 at the bottom of the optical fiber preform mold 7 with the heating plate 2, and preheating;
s3, when the optical fiber preform mold 7 and the second clamping groove 3 reach 420-450 ℃, loosening the second clamping groove 3 and the heating plate 2, controlling the first motor 12 to rotate, and adjusting the optical fiber preform mold 7 and the second clamping groove 3 plugged at the bottom of the optical fiber preform mold to form an included angle of 45 degrees with the heating plate;
s4, introducing the prepared Te-Zn-Na cladding glass liquid into the optical fiber preform mold 7 until the cladding glass liquid fills the optical fiber preform mold 7, and the liquid level of the cladding glass liquid reaches the position of a clamping groove (a first clamping groove 10) at the top of the optical fiber preform mold 7;
s5, pouring the prepared Te-Zn-Na fiber core glass liquid into a clamping groove at the top of the optical fiber preform mold 7, namely a first clamping groove 10;
s6, controlling the first motor 12 to reversely rotate, adjusting the optical fiber preform mold 7 to be perpendicular to the heating plate 2 again, returning to the state of S2, wherein the optical fiber preform mold 7 is in a vertical state at the moment, and fixing the second clamping groove 3 at the bottom of the optical fiber preform mold 7 with the heating plate 2 again;
s7, starting a laser thermometer 8 to measure the temperature of glass liquid in the optical fiber preform mold 7, when the temperature of the glass liquid is detected to be reduced to 430 ℃, the laser thermometer 8 sends a feedback signal to a data information acquisition processor (namely a control module), a second motor 13 is started to vertically lift the horizontal arm 111 together with the optical fiber preform mold 7 at a constant speed, the optical fiber preform mold 7 is separated from the second clamping groove 3 at the bottom, te-Zn-Na cladding glass liquid in the center of the optical fiber preform mold 7 flows out due to the action of gravity, and Te-Zn-Na core glass liquid in the first clamping groove 10 is immediately filled into the optical fiber preform mold 7.
Therefore, the soft glass optical fiber preform preparation device and the soft glass optical fiber preform preparation method provided by the technical scheme are reasonable in structural arrangement, the soft glass optical fiber preform is prepared by adopting mechanical and semi-automatic means through integrating the optical fiber preform forming module, the heating module, the temperature measuring module, the supporting module, the control module and the like, the optical fiber preform forming module is controlled to feed, discharge and the like through electric signal communication among the heating module, the temperature measuring module and the control module, the detection precision is high, the operation connectivity is strong, the success rate of optical fiber preform preparation is improved, and the repeatability is good.
The device and the method for preparing the soft glass optical fiber preform can more accurately control the viscosity of glass liquid and obtain the special glass optical fiber preform with higher optical quality.
According to the device and the method for preparing the soft glass optical fiber preform, the diameter of the fiber core can be controlled in a smaller range, so that the utilization rate of the glass optical fiber preform is improved.
It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (9)
1. A soft glass optical fiber preform manufacturing apparatus, comprising:
the optical fiber preform molding module comprises an optical fiber preform mold, a first clamping groove and a second clamping groove, wherein the first clamping groove and the second clamping groove are respectively blocked at two ends of the optical fiber preform mold; the first clamping groove is a first funnel-shaped clamping groove, the tip end of the first funnel-shaped clamping groove faces the inside of the optical fiber preform mold and is used for containing the fiber core glass liquid, and after the cladding glass liquid in the center of the optical fiber preform mold flows out, the fiber core glass liquid is filled into the optical fiber preform mold; the second clamping groove is a second funnel-shaped clamping groove, and the tip end of the second funnel-shaped clamping groove faces the inside of the optical fiber preform mold;
the heating module can heat the optical fiber preform molding module;
the temperature measuring module can monitor the heating temperature of the cladding glass liquid in the optical fiber preform mold in real time;
the support module comprises a bottom plate, a movable bracket and a bracket driving unit; the movable bracket is movably arranged on the bottom plate and used for installing the optical fiber preform mold, and the second funnel-shaped clamping groove can be detachably connected with the bottom plate; the support driving unit is connected with the movable support to drive the optical fiber preform mold to overturn and lift;
the control module is in communication connection with the heating module, the temperature measuring module and/or the bracket driving unit.
2. The soft glass optical fiber preform fabricating device according to claim 1, wherein the heating module comprises:
the heating plate is arranged on the bottom plate, can heat the second funnel-shaped clamping groove and is detachably connected with the second funnel-shaped clamping groove;
and the heating sleeve is sleeved on the periphery of the optical fiber preform mould and used for heating the optical fiber preform mould.
3. The apparatus according to any one of claims 1 to 2, wherein the optical fiber preform mold is a cylindrical mold, a glass liquid containing cavity is provided inside the cylindrical mold, and a cross section of the glass liquid containing cavity cut along a radial direction of the cylindrical mold is circular or polygonal.
4. The apparatus according to any one of claims 1 to 2, wherein the support module further comprises a fixing bracket provided on the base plate; the fixing support is provided with a first fixing frame so as to fix the temperature measuring module above the optical fiber preform forming module.
5. The apparatus for preparing a soft glass optical fiber preform according to claim 4, wherein the temperature measuring module is a laser temperature measuring instrument.
6. The apparatus for preparing a soft glass optical fiber preform according to any one of claims 1 to 2, wherein the movable support is an inverted L-shaped support, comprising:
the vertical arm is perpendicular to the bottom plate, the top of the vertical arm is a vertical section, the bottom of the vertical arm is bent to form an arc bending section, a plurality of gear teeth are arranged on the bottom side wall of the arc bending section along the radian direction of the arc bending section, a pitching driving gear meshed with the arc bending section is arranged on the bottom plate, and the pitching driving gear is connected with the bracket driving unit;
the horizontal arm is slidably mounted on the vertical section and is perpendicular to the vertical section, and the horizontal arm can be driven by the bracket driving unit to lift.
7. The soft glass optical fiber preform fabricating device according to claim 6, wherein the holder driving unit comprises:
the pitching driving assembly comprises a first motor and a pitching driving gear, and the pitching driving gear is connected with the output end of the first motor;
the lifting driving assembly comprises a second motor, a lifting driving gear and a straight rack, the lifting driving gear is rotatably arranged on the vertical section, and the lifting driving gear is connected with the output end of the second motor; the straight rack is fixedly arranged on the horizontal arm, and is meshed with the lifting driving gear.
8. A method for producing a soft glass optical fiber preform, using the soft glass optical fiber preform production apparatus according to any one of claims 1 to 7, comprising:
presetting the heating temperature of the optical fiber preform molding module and the feedback temperature of the temperature measuring module through the control module;
starting the heating module to heat the optical fiber preform molding module;
heating the optical fiber preform forming module to a preset heating temperature, and then introducing cladding glass liquid into the optical fiber preform die;
introducing a core glass liquid into one of the first and second clamping grooves;
fixing the other one of the first clamping groove and the second clamping groove with the bottom plate;
and adopting the temperature measuring module to measure the temperature of the cladding glass liquid in the optical fiber preform mold, and driving the optical fiber preform mold to move through the bracket driving unit when the measured temperature reaches a preset feedback temperature, so that the optical fiber preform mold is separated from the first clamping groove or the second clamping groove fixed with the bottom plate, the cladding glass liquid in the center of the optical fiber preform mold flows out, and meanwhile, the fiber core glass liquid is filled into the optical fiber preform mold.
9. The method for manufacturing a soft glass optical fiber preform according to claim 8, wherein an upper heating temperature limit of the heating module is not lower than 600 ℃; the detection temperature range of the temperature measuring module is 250-700 ℃.
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| JPH1160260A (en) * | 1997-08-08 | 1999-03-02 | Fujikura Ltd | Production of optical fiber preform |
| CN213446852U (en) * | 2020-09-29 | 2021-06-15 | 内蒙古世环新材料股份有限公司 | Wire drawing device for preparing high-performance glass fiber cotton |
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| JP2751982B2 (en) * | 1992-09-22 | 1998-05-18 | 日本電信電話株式会社 | Optical fiber manufacturing method |
| JP2010105869A (en) * | 2008-10-31 | 2010-05-13 | Ohara Inc | Optical device manufacturing apparatus and optical instrument manufacturing apparatus |
| CN101486531A (en) * | 2009-02-27 | 2009-07-22 | 中国科学院上海光学精密机械研究所 | 2 mu m high thulium-doped fluorophosphate glass optical fiber and preparation method thereof |
| US11169029B2 (en) * | 2018-08-27 | 2021-11-09 | Waviks, Inc. | Coaxial fiber optical pyrometer with laser sample heater |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1160260A (en) * | 1997-08-08 | 1999-03-02 | Fujikura Ltd | Production of optical fiber preform |
| CN213446852U (en) * | 2020-09-29 | 2021-06-15 | 内蒙古世环新材料股份有限公司 | Wire drawing device for preparing high-performance glass fiber cotton |
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