CN112609236A - Automatic optical fiber crystal preparation system utilizing laser annular heating - Google Patents
Automatic optical fiber crystal preparation system utilizing laser annular heating Download PDFInfo
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- 239000013078 crystal Substances 0.000 title claims abstract description 55
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 230000033001 locomotion Effects 0.000 claims abstract description 71
- 230000003287 optical effect Effects 0.000 claims abstract description 48
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
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- 238000011161 development Methods 0.000 description 2
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
- C30B11/005—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method by irradiation or electric discharge
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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Abstract
The invention belongs to the field of basic materials, relates to the technical field of crystal growth, and particularly relates to an automatic preparation system of an optical fiber crystal by utilizing laser annular heating, which comprises a water cooling system structure, a furnace body frame main body structure and a control structure, wherein the water cooling system is connected with the furnace body structure through a water cooling pipeline, and the control structure is connected with other two parts through a communication line and a driving line and is controlled; an optical heating system, a hearth vacuum system, a motion system and a mapping system are arranged on the main body structure of the furnace body frame, and a sealing window mirror facing to the beam-changing ring device is arranged in the hearth vacuum system; the optical heating system is used for generating laser beams and inputting the laser beams into the hearth vacuum system; a folding axis reflection and focusing reflection system is arranged in the hearth vacuum system; the motion system is used for controlling the feeding rod and the seed crystal rod to move up and down; the laser heating system can generate laser beams with different diameters and energy densities, and the adjustability of the laser heating system is enhanced.
Description
Technical Field
The invention belongs to the field of basic materials, relates to the technical field of crystal growth, and particularly relates to an automatic preparation system of an optical fiber crystal by utilizing laser annular heating.
Background
The single crystal optical fiber is an optical fiber made of single crystal material, which not only has the chemical and physical properties of single crystal material, but also has the characteristics of optical fiber, such as anti-electromagnetic interference, good light transmission, small volume, light weight, etc. In recent years, with the rapid development of optical fiber sensing technology and optical fiber laser technology and the continuous improvement of the preparation technology of single crystal optical fiber, the single crystal optical fiber with different matrixes has gained more and more attention from researchers in the industry in both the growth and the application.
Because the crystal diameter of the single crystal optical fiber is extremely small, the traditional crystal growth method can not meet the growth requirement, and the laser heating mode is adopted to realize the crystal growth, so that the single crystal optical fiber has the following advantages:
a small melting zone can be formed, and high melting zone temperature can be realized;
the growth is carried out in a crucible-free mode, so that the pollution problem is avoided;
the melting zone is small, the temperature gradient is large, and the growth speed is high;
the material consumption is less, the power is low, and the energy efficiency ratio is favorably improved;
the method is simple to use, has wide application materials, and is particularly suitable for material screening and new material development;
therefore, the mode of realizing crystal growth by adopting laser heating is widely applied.
However, there is basically no single crystal optical fiber growth equipment which can be used in engineering in China, the price of imported equipment is expensive, and the key technology and facilities have forbidden risks. The existing domestic single crystal optical fiber growth equipment is mostly built by a user, can be used for millimeter-scale single crystal growth, is simple and crude, has incomplete function, poor heating stability and uniformity, adopts a manual mode in a control process, and is poor in growth consistency.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an automatic preparation system of an optical fiber crystal by utilizing laser annular heating, which comprises a water cooling system structure 1, a furnace body frame main body structure 2 and a control structure 3, wherein the water cooling system is connected with the furnace body structure through a water cooling pipeline, and the control structure 3 is connected with other two parts through a communication line and a driving line and is controlled; an optical heating system, a hearth vacuum system 21, a moving system and a mapping system are arranged on the furnace body frame main body structure 2, and a sealing window mirror facing to the beam-changing ring device is arranged in the hearth vacuum system 21; the optical heating system is used for generating laser beams and inputting the laser beams into the hearth vacuum system 21; an independent mounting substrate is arranged in the hearth vacuum system 21, a folding axis reflection and focusing reflection system is mounted on the substrate, the folding axis reflection system and the focusing reflection system can be adjusted in four directions, namely, up, down, left and right, the folding axis reflection system and the beam expanding system 22 are horizontally arranged, the center positions are equal in height, the height positions are adjustable, the folding axis system and the focusing reflection system are vertically arranged, and the center holes are coaxial; the motion system is used for controlling the feed rod and the seed crystal rod to move up and down, and the vertical direction of the motion system is positioned at the central position of the focusing reflection focus in the normal use process.
Further, the optical heating system comprises a laser 28 and a beam-change ring system, the laser 28 comprising CO2Laser and visible laser, from CO2Laser and visible laser to generate laser light, the CO2The laser and the visible laser are arranged on the same optical base platform structure, CO2The laser and the visible laser have the same output horizontal height and parallel output directions, and the beam change ring system is used for generating the laser.
Further, a collimation and beam expansion device 27 is arranged between the laser 28 and the beam change ring system in the optical heating system, and laser beams generated by the laser 28 are diffused through a front concave lens and a rear convex lens of the collimation and beam expansion device 27.
Further, a beam splitting device is arranged between the collimation and beam expanding device 27 and the laser 28, the beam splitting device splits the laser generated by the laser 28, one beam is input into the collimation and beam expanding device 27, and the other beam is subjected to power modulation.
Further, the optical heating system further includes a beam combining device, the beam combining device is disposed between the collimating beam expanding device 27 and the beam changing ring system, the beam combining device includes a first reflector and a beam combining mirror, the visible light emitter is disposed toward the first reflector, the first reflector can reflect the visible light beams emitted by the visible light emitter to the beam combining mirror, the laser emitter is disposed toward the beam combining mirror, the beam combining mirror is of a semi-reflective and semi-transparent optical structure, and the beam combining mirror combines the optical path of the visible light beams reflected by the first reflector and the optical path of the laser light beams emitted by the laser emitter into the same optical path and makes the same optical path face the beam changing ring device.
Further, the motion system comprises a lower lifting motion structure 23, a lower lifting motion centering adjustment structure 24, an upper lifting motion centering adjustment structure 25 and an upper lifting motion structure 26, wherein the lower lifting motion structure 23 is mounted on the lower lifting motion centering adjustment structure 24 and can move up and down on the lower lifting motion centering adjustment structure 24; go up elevating movement structure 26 and install on last elevating movement centering adjustment structure 25, and lower elevating movement structure 23 can reciprocate on last elevating movement centering adjustment structure 25, and lower elevating movement structure 23 is used for installing the feed rod, and rising elevating movement structure 26 is used for installing the seed crystal stick.
Further, a large subdivision control technology is adopted to control the lead screw guide rail to directly drive the upper lifting movement structure 26 and the lower lifting movement structure 23.
Furthermore, the folding axis reflection and focusing reflection system comprises a folding axis device and a focusing mirror, the folding axis device can change the direction of the hollow annular light beam emitted by the beam change ring device and emit the hollow annular light beam to the focusing mirror, the focusing mirror can focus the hollow annular light beam and emit the hollow annular light beam to the area to be heated, and the focusing mirror is a spherical mirror or an aspheric mirror.
Furthermore, water cooling pipelines are arranged on the folding shaft device and the focusing mirror through water cooling systems.
Compared with the prior art which can only generate annular light beams, the collimation and beam expansion device expands light beam laser with high energy density and small diameter (2-4mm) generated by a laser transmitter into the actually required light beam size through the action of the front concave lens and the rear convex lens, can generate laser beams with different diameters and energy densities, and enhances the adjustability of a laser heating system.
Drawings
FIG. 1 is a schematic diagram of an optical system of the present invention;
FIG. 2 is a schematic view of a visual optical debugging according to the present invention;
FIG. 3 is a schematic view of a single crystal growth structure of an optical fiber according to the present invention;
wherein, 1, a water cooling system structure; 2. a furnace body frame main body structure; 21. a hearth vacuum system; 22. a folding axis reflection system and a beam expanding system; 23. a lower lifting motion structure; 24. a lower lifting movement centering adjustment structure; 25. an upper lifting movement centering adjustment structure; 26. an upper lifting motion structure; 27. a collimation and beam expansion device; 28. a laser; 3. a control structure; 101A, a laser beam; 101B another laser; 101C, a first mirror; 101E, a beam combiner; 104. a folding axis mirror; 105. a focusing mirror; 106. a feed rod; 107. seed crystal rod; 109. a mapping system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an automatic preparation system of an optical fiber crystal heated by laser ring, which comprises a water cooling system structure 1, a furnace body frame main body structure 2 and a control structure 3, wherein the water cooling system is connected with the furnace body structure through a water cooling pipeline, and the control structure 3 is connected with other two parts through a communication line and a driving line and is controlled; an optical heating system, a hearth vacuum system 21, a moving system and a mapping system are arranged on the furnace body frame main body structure 2, and a sealing window mirror facing to the beam-changing ring device is arranged in the hearth vacuum system 21; the optical heating system is used for generating laser beams and inputting the laser beams into the hearth vacuum system 21; an independent mounting substrate is arranged in the hearth vacuum system 21, a folding axis reflection and focusing reflection system is mounted on the substrate, the folding axis reflection system and the focusing reflection system can be adjusted in four directions, namely, up, down, left and right, the folding axis reflection system and the beam expanding system 22 are horizontally arranged, the center positions are equal in height, the height positions are adjustable, the folding axis system and the focusing reflection system are vertically arranged, and the center holes are coaxial; the motion system is used for controlling the feeding and the seed crystal rod to move up and down, and the vertical direction of the motion system is positioned at the central position of the focusing reflection focus in the normal use process. The refraction axis reflection and focusing reflection system is used for refracting or reflecting the laser beam.
Example 1
Before growing the crystal by using the optical fiber single crystal growing equipment, the installation of each device in the system is firstly completed, the power supply of the equipment is started, and the detection control of the equipment is carried out according to the following sequence:
the water cooling system of the system is ensured to run reliably and the temperature is normal;
the accurate movement speed of the up-and-down movement structure of the system is ensured;
ensuring that the light path of the visible light beam is overlapped with the light path of the laser beam, only starting the visible light emitter, and judging whether the light path of the laser beam is accurate or not through the light path of the visible light beam;
after the developing paper is installed, the power of the laser is output in a inching mode, and the shape of a laser output spot is confirmed to be normal.
Ensuring that the up-and-down motion structures of the system are aligned and superposed and are positioned on a focus point heated by a system light path;
ensuring the measurement and communication control of the system surveying and mapping system to be normal.
After the above inspection is completed, the feed rod and the seed rod can be loaded, and the laser power can be output for secondary confirmation. After the secondary confirmation is completed, the visible light laser emitter can be turned off and the CO is passed2The laser heats and crystal growth occurs.
Various optical heating systems can be arranged on the mounting frame through a support, the optical heating device comprises a laser 1, a collimation and beam expansion system, a beam change ring system, a CCD display system, a mapping system and the like, and the position and the orientation of each device are adjustable; the support comprises a rigid vibration isolation-free support frame, a passive vibration isolation support frame, an active automatic leveling support frame and the like. How to adjust the position and orientation of the device on the optical platform is the prior art and will not be described herein. In the present invention, as shown in fig. 1, the propagation direction of the light beam after passing through the beam-varying ring system is changed as shown by the arrow in the figure after being reflected by the folding axis device 104, and the light beam is focused on the positions of the feed rod 106 and the seed rod 107 by the focusing mirror 105, and the growth is observed by the mapping system 109.
As shown in fig. 2, the beam combiner includes a first reflector 101C and a beam combiner 101E, in an actual operation process, the visible light emitter is disposed toward the first reflector, that is, the visible light emitter generates another laser beam 101B, the first reflector can reflect the visible light beam emitted by the visible light emitter toward the beam combiner, the laser emitter is disposed toward the beam combiner, that is, the laser emitter generates a laser beam 101A, and the beam combiner can combine a light path of the visible light beam reflected by the first reflector and a light path of the laser beam emitted by the laser emitter into the same light path and make the same light path face the beam transformer. Due to visible light and CO2The optical path wavelength of the laser is different, so that the adjusting mirror 101D between the first reflecting mirror and the beam combining mirror can adjust and compensate the visible light beam reflected by the first reflecting mirror 101C, and the same optical path track as the laser can be realized by adjusting and compensating the subsequent light beams. The optical path focusing effect of the laser emitter and the invisible laser is realized, namely, the power modulation is carried out; the horizontal height, the parallelism and the like of the two light paths can be adjusted by adjusting various supports on the optical platform, so that the two light paths are ensured to have consistent effect.
As shown in figure 3, the main structure of the invention is divided into three independent parts, including a water cooling system structure, a furnace body frame main structure 2 and a control structure, wherein the water cooling system is connected with the furnace body structure through a water cooling pipeline, and the control cabinet structure is connected with the other two parts through a communication line and a driving line and is controlled; the optical heating system, the hearth vacuum system 21, the moving system and other units are all supported and installed by the hearth frame structure. The structure such as lower margin, shock attenuation and vibration isolation support carries out the leveling installation, and each part structure assembly need assemble the installation according to proprietary technology assembly file, and it is no longer repeated here.
The special surveying and mapping system is separated from two sides of the hearth, and can dynamically survey and map the current crystal growth diameter in real time; the measurement display precision can reach 0.1 μm, and the crystal diameter measured in real time is accessed into a control cabinet through communication and is compared and processed with the theoretically set diameter; the parameters such as the up-down lifting speed, the laser power and the like are output and controlled, and the diameter control of the crystal growth is realized.
According to the invention, a large subdivision control technology is adopted to control the lead screw guide rail to directly drive the moving system of the hearth, so that the moving system can synchronously and directly realize the real-time movement speed control of 0.01mm-6000mm/h, and the movement stroke of the moving system can exceed 700 mm; the motion system is provided with an automatic diameter aligning system based on optical position measurement, the diameter aligning system can be X, Y two-way adjusted, and the concentric alignment degree of an up-and-down motion mechanism below the motion unit can be dynamically adjusted in real time. The motion system comprises a lower lifting motion structure 23, a lower lifting motion centering adjustment structure 24, an upper lifting motion centering adjustment structure 25 and an upper lifting motion structure 26, wherein the lower lifting motion structure 23 is installed on the lower lifting motion centering adjustment structure 24 and can move up and down on the lower lifting motion centering adjustment structure 24; go up elevating movement structure 26 and install on last elevating movement centering adjustment structure 25, and lower elevating movement structure 23 can reciprocate on last elevating movement centering adjustment structure 25, and lower elevating movement structure 23 is used for installing the feed rod, and rising elevating movement structure 26 is used for installing the seed crystal stick.
In the invention, the application of the vacuum system and the control of the thickness and the structure of the light path sealing window enable the vacuum hearth system to realize 10-4Vacuum of Pa grade and positive pressure of 0.05 MPa.
According to the invention, centering X-Y moving platforms of the feed rod and the seed crystal rod are respectively arranged on the up-and-down motion system, through the display and mapping calculation of a CCD system, calculation signals are calculated through a controller in a control cabinet, the X-Y moving platforms are directly driven to realize the automatic centering of the feed rod and the seed crystal rod, and the equal-diameter stable control of crystal growth can be optimized.
The laser heating device in the prior art can only generate the annular beam, and the energy density, the irradiation area and the like of the annular beam are limited by the initial laser beam emitted by the laser emitter. In the invention, a collimation and beam expanding device 27 is added, as shown in fig. 1, the collimation and beam expanding device 27 expands the light beam laser with high energy density and small diameter (2-4mm) generated by a laser transmitter into the actually required light beam size through the action of a front concave lens and a rear convex lens, so that laser beams with different diameters and energy densities can be generated, and the adjustability of a laser heating system is enhanced; by adjusting the distance between the concave lens and the convex lens, the effect of adjusting the beam expanding effect can be achieved.
In terms of laser selection, CO2The laser can be selected from 10.6 μm wavelength laser, such as 1062nm CO, and other wavelength bands2Lasers, visible lasers include, but are not limited to 632nm visible lasers. CO 22The laser and the visible laser can be combined by a beam combining mechanism. The beam combining device comprises a first reflector and a beam combining mirror, wherein a visible light emitter is arranged towards the first reflector, the first reflector can reflect a visible light beam emitted by the visible light emitter to the beam combining mirror, a laser emitter is arranged towards the beam combining mirror, the beam combining mirror is of a semi-reflecting and semi-transmitting type optical structure, and the beam combining mirror combines a light path of the visible light beam reflected by the first reflector and a light path of a laser light beam emitted by the laser emitter into the same light path and enables the same light path to face a beam changing ring device.
An optical heating unit is arranged on an optical base on the side surface of the main body structure 2 of the furnace body frame, the optical heating unit is provided with a coaxial visible light indicator, a laser micro-light splitting and dynamic power stability adjusting system, the output stability of the heating unit and the light intensity distribution of a focusing heating focus can be adjusted in real time, and finally the growth of a 100 mu m-grade single crystal optical fiber can be realized; the optical heating power supply adopts CO2Laser but not limited to CO2The laser source has the laser output power of 30-400W, and the power output resolution can reach 0.01W.
Heating and heating the feed rod arranged on the lower movement mechanism by an optical heating system, forming a melting zone with a specific shape at the top end of the feed rod, and inoculating by using the seed rod arranged on the upper movement mechanism. On the premise of certain power, speed and atmosphere environment, the growth condition is monitored in real time by using a mapping unit, and parameters such as power, speed and the like of a laser are adjusted in real time through special operation to realize the controllable stable growth of the diameter of the single crystal optical fiber. Preferably, the system furnace side is provided with a single crystal optical fiber growth state mapping unit, which comprises a mapping emitting unit and a mapping receiving unit, the diameter and growth offset of the growing single crystal optical fiber can be dynamically measured and automatically controlled and adjusted through data operation, the growth state mapping unit can obtain the diameter distribution of the single crystal optical fiber in a certain length range, and the diameter measurement display precision can reach 0.1 μm. The measuring means includes laser, CCD and is not limited to these two means.
Further, a beam splitting device interface is further provided between the collimation and beam expansion devices 27, the beam splitting device can split the visible light beam or the laser beam into two visible light beams or laser beams with different directions, and the visible light beams or the laser beams can be respectively subjected to collimation and beam expansion and power modulation and then combined again to enter the beam change ring device. Meanwhile, a laser power modulation installation expansion interface can be reserved between the visual laser emitting device and the collimation and beam expansion device 27 in advance, through the interface, a beam splitting device can be installed between the visual laser emitting device and the collimation and beam expansion device 27, and the beam splitting device can adopt a beam splitter or a beam splitter. Meanwhile, a laser power modulation installation expansion interface can be reserved between the visual laser emitting device and the collimation and beam expansion device 27 in advance, through the interface, a beam splitting device can be installed between the visual laser emitting device and the collimation and beam expansion device 27, and the beam splitting device can adopt a beam splitter or a beam splitter. Therefore, the light beam can be divided into two beams, one beam is still used for heating the system, the other beam can be used for other purposes according to the process requirements, and the effect of adjusting the power of the heating light beam can also be achieved.
As an alternative embodiment, the visualization laser emitting device and the collimation and beam expansion device 27 are installed in a dustproof sealing structure.
Example 2
On the basis of embodiment 1, the system of this embodiment further includes an optical measurement device facing the region to be heated, and the optical measurement device includes a CCD detector. The optical measuring device is used for measuring the diameter of the optical fiber single crystal growing in real time and the appearance of a melting zone, so that working personnel can know the growth condition of the crystal, and the regulation and control and other operations of laser are facilitated.
The folding axis reflection and focusing reflection system in the embodiment comprises a folding axis device and a focusing mirror, wherein the folding axis device can change the direction of a hollow annular light beam emitted by a beam change ring device and emit the hollow annular light beam to the focusing mirror, the focusing mirror can focus the hollow annular light beam and emit the hollow annular light beam to a region to be heated, and the focusing mirror comprises a spherical mirror or an aspheric mirror. The folding shaft device and the focusing mirror are provided with water cooling devices, and the thermal deformation of the optical device can be effectively reduced by using the water cooling devices, so that the optical path of the system is more stable.
The furnace body frame main body structure 2 is made of stainless steel materials, and is provided with a water cooling structure and electrolytic polishing treatment, a folding shaft, a focusing device and a crystal growth area are all arranged in a vacuum furnace, and a sealing window mirror facing a beam change ring device is arranged in the vacuum furnace. The vacuum hearth and the up-and-down movement mechanism are hermetically connected by adopting a vacuum welding corrugated pipe; the vacuum furnace chamber is provided with various vacuum valve bodies, high and low vacuum pumps and corresponding control structures; the folding shaft device and the focusing lens are provided with water cooling devices, and the requirement of single crystal growth below 3000 ℃ can be met.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "outer", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "rotated," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An automatic preparation system of optical fiber crystals heated by laser ring is characterized by comprising a water cooling system structure (1), a furnace body frame main body structure (2) and a control structure (3), wherein the water cooling system is connected with the furnace body structure through a water cooling pipeline, and the control structure (3) is connected with other two parts through a communication line and a driving line and is controlled; an optical heating system, a hearth vacuum system (21), a motion system and a mapping system are arranged on the furnace body frame main body structure (2), and a sealing window mirror facing the beam ring changing device is arranged in the hearth vacuum system (21); the optical heating system is used for generating laser beams and inputting the laser beams into the hearth vacuum system (21); an independent mounting substrate is arranged in the hearth vacuum system (21), a folding axis reflection and focusing reflection system is mounted on the substrate, the folding axis reflection system and the focusing reflection system can be adjusted in four directions, namely, up, down, left and right, respectively, the folding axis reflection system and the beam expanding system (22) are horizontally arranged, the center positions are equal in height, the height positions are adjustable, the folding axis system and the focusing reflection system are vertically arranged, and the center holes are coaxial; the motion system is used for controlling the feed rod and the seed crystal rod to move up and down, and the vertical direction of the motion system is positioned at the central position of the focusing reflection focus in the normal use process.
2. The system of claim 1, wherein the optical heating system comprises a laser (28) and a beam-varying ring system, and the laser (28) comprises CO2Laser and visible laser, from CO2Laser and visible laser to generate laser light, the CO2The laser and the visible laser are arranged on the same optical base platform structure, CO2The laser and the visible laser have the same output horizontal height and parallel output directions, and the beam change ring system is used for generating the laser.
3. The automatic preparation system of the optical fiber crystal by using the laser ring heating as claimed in claim 2, characterized in that a collimation and beam expanding device (27) is arranged between the laser (28) and the beam change ring system in the optical heating system, and the laser beam generated by the laser (28) is diffused by a front concave lens and a rear convex lens of the collimation and beam expanding device (27).
4. The automatic preparation system of the optical fiber crystal by using the laser annular heating as claimed in claim 3, wherein a beam splitting device is arranged between the collimation and beam expanding device (27) and the laser (28), the beam splitting device splits the laser generated by the laser (28), one beam is input into the collimation and beam expanding device (27), and the other beam is subjected to power modulation.
5. The system of claim 4, wherein the optical heating system further comprises a beam combiner disposed between the collimating beam expander (27) and the beam-changing ring system, the beam combiner comprises a first reflector and a beam combiner, the visible light emitter is disposed toward the first reflector, the first reflector is capable of reflecting the visible light beam emitted by the visible light emitter toward the beam combiner, the laser emitter is disposed toward the beam combiner, the beam combiner is of a semi-reflective and semi-transparent type optical structure, and the beam combiner combines the optical path of the visible light beam reflected by the first reflector and the optical path of the laser light beam emitted by the laser emitter into the same optical path and makes the same optical path toward the beam-changing ring device.
6. The automatic preparation system of the optical fiber crystal by using the laser ring heating as claimed in claim 1, wherein the motion system comprises a lower lifting motion structure (23), a lower lifting motion centering adjustment structure (24), an upper lifting motion centering adjustment structure (25), and an upper lifting motion structure (26), wherein the lower lifting motion structure (23) is installed on the lower lifting motion centering adjustment structure (24) and can move up and down on the lower lifting motion centering adjustment structure (24); go up elevating movement structure (26) and install on last elevating movement centering adjustment structure (25), and lower elevating movement structure (23) can reciprocate on last elevating movement centering adjustment structure (25), and lower elevating movement structure (23) are used for installing the feed rod, and rising elevating movement structure (26) are used for installing the seed crystal stick.
7. The automatic preparation system of optical fiber crystal using laser ring heating as claimed in claim 6, wherein a large subdivision control technique is used to control the lead screw guide rail to directly drive the upper lifting motion structure (26) and the lower lifting motion structure (23).
8. The system of claim 1, wherein the optical fiber crystal heating system comprises a bending device and a focusing mirror, the bending device can change the direction of the hollow annular light beam emitted from the beam-changing ring device and emit the hollow annular light beam to the focusing mirror, the focusing mirror can focus the hollow annular light beam and emit the focused hollow annular light beam to the region to be heated, and the focusing mirror is a spherical mirror or an aspheric mirror.
9. The automatic preparation system of optical fiber crystal using laser ring heating as claimed in claim 8, wherein the folding axis device and the focusing mirror are equipped with water cooling pipes through water cooling systems.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110004496A (en) * | 2019-05-16 | 2019-07-12 | 中国电子科技集团公司第二十六研究所 | A kind of loop laser heating system |
| CN117966251A (en) * | 2024-04-02 | 2024-05-03 | 之江实验室 | Crystal rod preparation device, preparation method and crystal rod |
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| CN214458431U (en) * | 2020-12-29 | 2021-10-22 | 中国电子科技集团公司第二十六研究所 | Automatic optical fiber crystal preparation system utilizing laser annular heating |
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