CN112666658B - Manufacturing device of long tapered optical fiber and using method thereof - Google Patents
Manufacturing device of long tapered optical fiber and using method thereof Download PDFInfo
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- CN112666658B CN112666658B CN202011597927.XA CN202011597927A CN112666658B CN 112666658 B CN112666658 B CN 112666658B CN 202011597927 A CN202011597927 A CN 202011597927A CN 112666658 B CN112666658 B CN 112666658B
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Abstract
The invention provides a manufacturing device of a long tapered optical fiber and a using method thereof, which solve the technical problem that the manufacturing of the tapered optical fiber with waist length reaching several millimeters and high symmetry is difficult to realize in the prior art, and the manufacturing device comprises a base, a plurality of groups of electrode pairs are uniformly distributed and spaced side by side, and a linear guide rail is connected on the base; the optical fiber traction seat is provided with a groove and a threaded hole, the groove is in sliding fit with the linear guide rail, a power output shaft of the rotating motor is coaxially connected with a lead screw, the lead screw is in fit with the threaded hole, and the lead screw is parallel to the linear guide rail; the invention also discloses a use method of the device for manufacturing the long tapered optical fiber, which can be widely applied to the technical field of tapered optical fiber manufacturing.
Description
Technical Field
The invention relates to the technical field of tapered optical fiber manufacturing, in particular to a manufacturing device of a long tapered optical fiber and a using method thereof.
Background
Optical fibers are widely used as optical devices, and are widely used in the fields of sensing technology, communication and the like. The tapered optical fiber has the advantages of low cost, simple structure, good sensing property and the like, can replace expensive optical fiber devices and can achieve the same or even better effect. The configuration of the waist regions (length, diameter) and taper regions (length, profile) will result in different optical characteristics. There are two forms of tapered fibers in practical use: one is that a section of light cone is drawn into a cone, the length is short, the application is more in the coupling of optical fiber, light source and optical device, the optical fiber probe of the image scanning tunnel microscope, the light cone coupled with CCD, the cone microlens, etc.; the other is a longer conical fiber, which has wide application prospect in the aspect of image transmission of fiber bundles except for partial coupling. The long conical optical fiber bundle is made into an optical fiber image transmission bundle, can be used as a short-distance image transmission technology of a relay image transmission device, has the advantages of high resolution and distortion-free image transmission of a common optical fiber image transmission bundle, has the characteristics of image amplification and image reduction, light instrument weight and the like, simplifies the structure of an optical path, continuously reduces the volume, and has wide application prospect in industries such as automobiles, aerospace, medical treatment, buildings and the like.
At present, there are three main types of tapered optical fibers: grinding, etching and fusion-drawing processes. The diameters of the cladding and the fiber layer of the tapered optical fiber manufactured by adopting the fusion-drawing method are uniformly thinned along the axial direction of the optical fiber. While the grinding and etching methods merely locally thin the cladding. However, the above conventional methods for manufacturing long tapered optical fibers have significant disadvantages, including low symmetry coefficient of the tapered region, which is 0.9-0.5 or 1.7-3.7, small length of the waist region, which is less than 2.5mm, and difficulty in achieving manufacture of tapered optical fibers with a length of the waist region of several millimeters and high symmetry, and thus cannot meet the technical requirements of high-performance optical fiber sensors.
Disclosure of Invention
The invention provides a manufacturing device of a long tapered optical fiber and a using method thereof, aiming at the technical problems in the prior art, so that the manufacturing of the tapered optical fiber with waist length reaching several millimeters and high symmetry is realized, and the technical requirements of a high-performance optical fiber sensor are met.
In order to solve the above technical problems, the present invention provides a device for manufacturing a long tapered optical fiber, which comprises a base, a linear guide rail connected to the base, a pair of optical fiber traction devices oppositely arranged left and right, and a plurality of electrode pairs, wherein the number of the electrode pairs is at least three, and the electrode pairs are arranged side by side, evenly distributed and spaced, and heat a rod-shaped optical fiber clamped between the pair of optical fiber traction devices; the pair of optical fiber traction devices are provided with a pair of stepping motors, a pair of rotating motors, a pair of optical fiber traction seats and a pair of optical fiber clamps; the optical fiber traction seat is provided with a groove and a threaded hole, the groove is in sliding fit connection with the linear guide rail, a power output shaft of the rotating motor is coaxially connected with one end of a lead screw, the other end of the lead screw is in fit threaded connection with the threaded hole, the lead screw is arranged in parallel with the linear guide rail, and the stepping motor drives the optical fiber traction seat to move left and right along the linear guide rail through the lead screw; the optical fiber traction seat is provided with a rotating motor in a mounting connection mode, the rotating motor drives the optical fiber clamp to rotate, and a power output shaft of the rotating motor is arranged in parallel with the linear guide rail; the power output shaft of the rotating motor is coaxially connected with one end of the optical fiber clamp, the other end of the optical fiber clamp is used for clamping one end of the rod-shaped optical fiber, and the pair of optical fiber clamps are respectively used for clamping and fixing the two ends of the rod-shaped optical fiber; after the rod-shaped optical fiber is straightened by the optical fiber clamp, the rod-shaped optical fiber and a power output shaft of the pair of rotating motors are coaxial, the connecting line of the tips of the two electrodes of each group of electrode pairs is crosswise and vertically arranged with the rod-shaped optical fiber, and the tips of the two electrodes of each group of electrode pairs are symmetrically arranged relative to the rod-shaped optical fiber.
Preferably, the plurality of sets of electrode pairs are disposed in a middle region of the rod-shaped optical fiber.
Preferably, the linear guide rail is a miniature linear guide rail, and the precision of the linear guide rail is 1 micrometer.
Preferably, the number of the electrode pairs is seven, and the distance between the adjacent electrode pairs is 0.2-0.5 mm.
Preferably, the electrode tips of each group of electrode pairs are in an inward concave arc structure and are arranged opposite to each other.
Preferably, the optical fiber traction seat is further provided with a through hole, one end of the optical fiber clamp is coaxially connected with a power output shaft of the rotating motor, the other end of the optical fiber clamp penetrates through the through hole and extends out, and the through hole is in rolling connection with the optical fiber clamp through a bearing.
Preferably, the invention is also provided with an intelligent control system, the intelligent control system is provided with a central control unit, a plurality of groups of electrode pair heating units, a stepping motor control unit, a rotating motor control unit and a power supply unit, and the central control unit is respectively connected with the plurality of groups of electrode pair heating units, the stepping motor control unit and the rotating motor control unit through control circuits; the power supply unit is electrically connected with the central control unit, the heating units with the multiple groups of electrode pairs, the stepping motor control unit and the rotating motor control unit through leads respectively.
A method of using the above-mentioned apparatus for manufacturing a long tapered optical fiber, comprising the steps of:
step (1): respectively placing two ends of a rod-shaped optical fiber in a pair of optical fiber clamps for clamping; turning on a stepping motor, driving an optical fiber traction seat connected with the stepping motor to move through the stepping motor, and straightening the rod-shaped optical fiber;
step (2): simultaneously starting a pair of rotating motors to drive the rod-shaped optical fibers fixed by the pair of optical fiber clamps to synchronously rotate in the same direction, wherein the rotating speed of the rotating motors is controlled to be 300 r/min-900 r/min;
and (3): starting a central control unit and a plurality of groups of electrode pairs, wherein the central control unit controls the plurality of groups of electrodes to work on the electrodes which are symmetrically positioned at the left side and the right side of the electrodes, the power of an electrode exciting arc is controlled to be 50-200 mW, the discharge time is controlled to be 0.1-1.5 s, the rod-shaped optical fiber is heated, and meanwhile, a pair of stepping motors drive optical fiber drawing seats connected with the rod-shaped optical fiber to synchronously move the pair of optical fiber drawing seats towards the left side and the right side respectively, the moving speed is controlled to be 100-300 mu m/s, and the rod-shaped optical fiber is drawn to form a tapered zone structure at the left side and the;
and (4): the central control unit controls the electrodes symmetrically positioned on the left side and the right side of the multi-group electrode pairs to stop working, controls the electrodes positioned in the middle sections of the multi-group electrode pairs to start working, controls the power of the electrodes to excite the arc to be between 10 and 150mW, controls the discharge time to be between 0.1 and 1.5s, heats the rod-shaped optical fiber between the two conical areas, simultaneously drives the optical fiber drawing bases connected with the electrode drawing bases through a pair of stepping motors to ensure that the pair of optical fiber drawing bases synchronously move towards the left side and the right side respectively, controls the moving speed to be between 20 and 100 mu m/s, and draws the rod-shaped optical fiber to ensure that a waist region structure is formed between the two conical areas of the rod-shaped optical fiber; a long tapered optical fiber is obtained.
Preferably, a method of using the above-described apparatus for manufacturing an elongated tapered optical fiber, comprises the steps of:
step (1): respectively placing two ends of a rod-shaped optical fiber in a pair of optical fiber clamps for clamping; starting a pair of stepping motors, and driving an optical fiber traction seat connected with the stepping motors to synchronously move towards the left side and the right side at a speed of 10-20 mu m/s by the pair of stepping motors until the rod-shaped optical fiber is straightened;
step (2): simultaneously starting a pair of rotating motors to drive the rod-shaped optical fibers fixed by the pair of optical fiber clamps to synchronously rotate in the same direction, wherein the rotating speed of the rotating motors is controlled to be 300 r/min-450 r/min;
and (3): starting a central control unit and a plurality of groups of electrode pairs, wherein the central control unit controls the plurality of groups of electrodes to work on the electrodes which are symmetrically positioned at the left side and the right side of the electrodes, the power of an electrode exciting arc is controlled to be 50-100 mW, the discharge time is controlled to be 0.8-1.2 s, the rod-shaped optical fiber is heated, and meanwhile, a pair of stepping motors drive optical fiber drawing seats connected with the rod-shaped optical fiber to synchronously move the pair of optical fiber drawing seats towards the left side and the right side respectively, the moving speed is controlled to be 100-150 mu m/s, and the rod-shaped optical fiber is drawn to form a tapered zone structure at the left side and the right side of the rod-shaped optical fiber respectively;
and (4): the central control unit controls the electrodes symmetrically positioned on the left side and the right side of the multi-group electrode pairs to stop working, controls the electrodes positioned in the middle sections of the multi-group electrode pairs to start working, controls the power of the electrodes to excite the arc to be 10-50 mW, controls the discharge time to be 0.1-0.8 s, heats the rod-shaped optical fiber between the two conical areas, simultaneously drives the optical fiber drawing bases connected with the electrodes through a pair of stepping motors, enables the pair of optical fiber drawing bases to synchronously move towards the left side and the right side respectively, controls the moving speed to be 70-100 mu m/s, draws the rod-shaped optical fiber, and enables the two conical areas of the rod-shaped optical fiber to form a waist region structure; a long tapered optical fiber is obtained.
Preferably, the rod-shaped optical fiber is a single clad multimode optical fiber.
Preferably, the rod-shaped optical fiber is a single-clad multimode optical fiber having a cladding outer diameter of 125 μm and a core outer diameter of 50 μm.
The invention has the beneficial effects that: the invention provides a manufacturing device of a long tapered optical fiber and a using method thereof, the manufacturing device has simple structure, convenient assembly, strong flexibility and high production efficiency, the rod-shaped optical fiber is heated successively under the action of electric arcs respectively excited between a plurality of groups of electrode pairs, and simultaneously, under the action of stretching and rotating of an optical fiber traction device, the long tapered optical fiber with the requirement of the dimensional precision of a specific cone region and a waist region structure is successively formed at the corresponding part of the rod-shaped optical fiber surrounded by the plurality of groups of electrode pairs.
(1) The invention introduces a control technology of combining a plurality of groups of electrode pairs and an optical fiber traction device, can effectively control the stability of the structure of the cone region and the waist region of the optical fiber, can regulate the power, time and sequence of the excitation electric arc of the plurality of groups of electrode pairs and control the drawing speed of the optical fiber traction device through the cooperative control of the plurality of groups of electrode pairs and the optical fiber traction device, and accurately control the structure sizes of the cone region and the waist region of the optical fiber so as to obtain the structure size of the required long cone optical fiber.
(2) The invention is provided with a plurality of groups of electrode pairs which can be controlled respectively or simultaneously, the rod-shaped optical fiber is positioned at the center of the tip end with the electrode arc structure in pairs, an intelligent control system is arranged, and a central control unit controls the heating unit, the stepping motor control unit and the rotating motor of the plurality of groups of electrode pairs in a cooperative way, thereby realizing the heating uniformity and the stability of the autorotation drawing process of the rod-shaped optical fiber and effectively controlling the structure sizes of the waist area and the cone area of the long tapered optical fiber.
(3) The invention is provided with a plurality of groups of electrode pairs, and can realize the low-cost controllable manufacture of the long tapered optical fiber through the combination of the plurality of groups of electrode pairs and the process control thereof.
(4) The method has the advantages of good repeatability, simple operation, good symmetry of the tapered fiber taper region, uniform diameter size of the waist region and the like, has wide application prospect, and can be used for preparing the long tapered fiber and the grating.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural view in partial cross-section of a front view of the present invention;
FIG. 2 is a schematic structural diagram of the top view shown in FIG. 1;
FIG. 3 is a schematic view of a fiber optic fifth wheel;
FIG. 4 is a schematic view of a plurality of electrode pairs and a pair of fiber holders holding fibers;
FIG. 5 is an enlarged view of portion A of FIG. 4;
FIG. 6 is a schematic structural diagram of an intelligent control system;
FIG. 7 is a schematic diagram of a structure of a long tapered optical fiber.
The symbols in the figures indicate: 1. a base; 2. a linear guide rail; 3. an optical fiber traction device; 4. an electrode pair; 5. a rod-shaped optical fiber; 6. a lead screw; 7. a bearing; 8. a central control unit; 9. a heating unit with a plurality of groups of electrode pairs; 10. a stepping motor control unit; 11. a rotating electric machine control unit; 12. a power supply unit; 13. a cone structure; 14. a lumbar region structure; 15. a key unit; 16. a display unit; 31. a stepping motor; 32. a rotating electric machine; 33. an optical fiber traction seat; 34. an optical fiber clamp; 331. a groove; 332. a threaded hole; 333. a through hole; 41. an electrode tip; 411. a circular arc structure; 42. an outermost electrode pair; 43. an electrode pair of the middle section; l. the line connecting the two electrode tips.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
As shown in fig. 1, 2 and 4, the present invention provides a device for manufacturing a long tapered optical fiber, which comprises a base 1, a linear guide rail 2 connected to the base 1, a pair of optical fiber traction devices 3 oppositely arranged left and right, and a plurality of electrode pairs 4, wherein the number of the electrode pairs 4 is seven, the electrode pairs are arranged side by side and uniformly spaced, and the rod-shaped optical fiber 5 clamped between the pair of optical fiber traction devices 3 is heated; the pair of optical fiber drawing devices 3 are provided with a pair of stepping motors 31, a pair of rotating motors 32, a pair of optical fiber drawing bases 33, and a pair of optical fiber clamps 34. As shown in fig. 3, the optical fiber traction base 33 is provided with a groove 331 and a threaded hole 332, the groove 331 is in sliding fit connection with the linear guide rail 2, a power output shaft of the rotating motor 32 is coaxially connected with one end of the screw rod 6, the other end of the screw rod 6 is in fit threaded connection with the threaded hole 332, the screw rod 6 is arranged in parallel with the linear guide rail 2, and the stepping motor 31 drives the optical fiber traction base 33 to move left and right along the linear guide rail 2 through the screw rod 6; the optical fiber traction seat 33 is provided with a rotating motor 32 in an installing and connecting manner, the rotating motor 32 drives the optical fiber clamp 34 to rotate, and a power output shaft of the rotating motor 32 is arranged in parallel with the linear guide rail 2; the power output shaft of the rotary motor 32 is coaxially connected to one end of the optical fiber holder 34, and the other end of the optical fiber holder 34 is used to hold one end of the rod-shaped optical fiber 5. As shown in fig. 4 and 5, a pair of optical fiber clamps 34 is used to clamp and fix two ends of the rod-shaped optical fiber 5, after the rod-shaped optical fiber 5 is straightened by the optical fiber clamps 34, the rod-shaped optical fiber 5 and the power output shaft of the pair of rotating motors 32 are coaxial, and the connecting line L of the two electrode tips 41 of each group of electrode pairs 4 is crosswise and vertically arranged with respect to the rod-shaped optical fiber 5, and the two electrode tips 41 of each group of electrode pairs 4 are symmetrically arranged with respect to the rod-shaped optical fiber 5.
In this embodiment, the optical fiber traction apparatus 3 includes an optical fiber clamp 34 for fixing the end of the rod-shaped optical fiber 5, and further includes a stepping motor 31 and a rotating motor 32 for respectively or simultaneously realizing the rotating motion and the horizontal linear motion of the optical fiber clamp 34, and further respectively or simultaneously realizing the self-rotating motion and the horizontal drawing of the rod-shaped optical fiber 5.
In this embodiment, the number of the electrode pairs 4 is seven, and the distance between the adjacent electrode pairs 4 is 03mm, which may be 0.2-0.5 mm. The number of electrode pairs 4 may also range from at least three groups, the number depending on the long tapered fiber waist region and taper structure size.
In this embodiment, a plurality of electrode pairs 4 are fixedly mounted on the base 1 side by side at intervals.
In this embodiment, the rod-shaped optical fiber 5 is clamped and fixed between a pair of optical fiber clamps 34, the plurality of sets of electrode pairs 4 are disposed in the middle region of the rod-shaped optical fiber 5, the middle region includes the midpoint of the rod-shaped optical fiber 5 or a position close to the midpoint, and the plurality of sets of electrode pairs 4 surround and heat the center region, so that the whole rod-shaped optical fiber 5 is balanced or tends to be balanced in stress during the stretching process by the optical fiber clamps 34, which is beneficial to more accurately controlling the outer diameter and the size of the heated portion of the rod-shaped optical fiber 5.
In this embodiment, the linear guide 2 is a miniature linear guide 2, and the precision of the linear guide 2 is 1 μm. The power output shaft of the rotating motor 32 is parallel to the linear guide rail 2, and the rod-shaped optical fiber 5 and the power output shafts of the pair of rotating motors 32 are coaxial, and the rod-shaped optical fiber 5 rotates in the heating process, so that the heated circumferential surface of the rod-shaped optical fiber 5 is uniformly heated, and the outer diameter and the size of the heated part of the rod-shaped optical fiber 5 are more accurately controlled in the heating and stretching process of the rod-shaped optical fiber 5.
In this embodiment, as shown in fig. 4 and 5, the electrode tips 41 of each group of electrode pairs 4 are provided with inwardly recessed micro arc structures 411 and are disposed opposite to each other, the arc radius of the arc structures 411 is 1mm, and the arc radius range thereof may be 0.5mm to 2 mm. The inward-recessed arc structures 411 and the electrode tips 41 facing each other are arranged, so that each group of electron pairs can be arranged coaxially, the requirement that the two electrode tips 41 face each other is met, the coaxial precision can be controlled to be phi 0.1-0.5 mm, the connecting line L of the two electrode tips 41 of each group of electrode pairs 4 and the rod-shaped optical fiber 5 are arranged in a cross-shaped and vertical manner, the two electrode tips 41 of each group of electrode pairs 4 are symmetrically arranged relative to the rod-shaped optical fiber 5, and the rod-shaped optical fiber 5 is positioned in the center of the connecting line L between the micro arc structures 411 of the electrode tips 41 of each group of electrode pairs 4; the circumferential surface of the heating portion of the rod-shaped optical fiber 5 is completely positioned in the range of the arc structure 411 which is recessed inwards and the excitation arcs of the two electrode tips 41 which are arranged opposite to each other are heated, so that the outer diameter and the size of the heating portion can be controlled more accurately.
In this embodiment, as shown in fig. 1 and 3, the optical fiber traction base 33 is further provided with a through hole 333, one end of the optical fiber clamp 34 is coaxially connected to the power output shaft of the rotating motor 32, the other end of the optical fiber clamp 34 passes through the through hole 333 and extends out, and the through hole 333 is in rolling connection with the optical fiber clamp 34 through the bearing 7. The rotary motor 32 is in rolling connection with the optical fiber traction seat 33, the optical fiber clamp 34 is also in rolling connection with the through hole 333 of the optical fiber traction seat 33 through the bearing 7, the power output shaft of the rotary motor 32 is coaxially and fixedly connected with the optical fiber clamp 34, and the rotary motor 32 and the optical fiber clamp 34 are both arranged on the optical fiber traction seat 33, so that on one hand, the stable reliability of the installation positions of the rotary motor 32 and the optical fiber clamp 34 is ensured; on the other hand, the optical fiber holder 34 is kept coaxial with the power output shaft of the rotating motor 32 during rotation in the through hole 333, so that the rod-shaped optical fiber 5 is more stably and reliably heated, drawn and rotated, and the outer diameter and size of the heated portion thereof are more accurately controlled.
In this embodiment, the optical fiber clamp 34 is a conventional clamp, one end of which is coaxially connected to the power output shaft of the rotating motor 32, and the other end of which clamps and fixes the rod-shaped optical fiber 5, and after the rod-shaped optical fiber 5 is straightened by the optical fiber clamp 34, the rod-shaped optical fiber 5 and the power output shafts of the pair of rotating motors 32 are coaxial, so as to ensure that the rod-shaped optical fiber 5 does not deviate in the process of heating, stretching and rotation, and always keep a more stable and reliable state, and the outer diameter and size of the heating part are more precisely controlled. Preferably, the fiber clamp 34 is of a conventional self-centering construction.
As shown in fig. 6, the present invention can be controlled by computer software, the implementation of which can be designed according to the prior art. One embodiment of the control system may adopt a structure in which the present invention is provided with an intelligent control system provided with a central control unit 8, a plurality of sets of electrode pair heating units 9, a stepping motor control unit 10, a rotating motor control unit 11, and a power supply unit 12. The central control unit 8 comprises an intelligent control device which can be a PLC programmable logic controller, and the central control unit 8 is respectively connected with the heating unit 9, the stepping motor control unit 10 and the rotating motor control unit 11 through control circuits. After the intelligent control system is started, the central control unit 8 sends a signal to the multiple groups of electrode pair heating units 9, so that the multiple groups of electrode pairs 4 can be started, and the electrode pairs 4 in the corresponding positions in the multiple groups of electrode pairs 4 are controlled to work or not work, namely, each group of electronic pairs 4 are controlled to be respectively or combinatively switched on and off, so that the corresponding positions of the rod-shaped optical fiber 5 are heated. The central control unit 8 sends a signal to the stepping motor control unit 10 to start the stepping motor 31, and control the stepping motor 31 to drive the optical fiber drawing base 33 to move along the linear guide rail 2, so as to realize the straightening or stretching of the rod-shaped optical fiber 5. The central control unit 8 sends a signal to the rotating motor control unit 11 to start the rotating motors 32, and controls the power output shafts of the pair of rotating motors 32 to rotate in the same direction in synchronization, thereby driving the rod-shaped optical fibers 5 fixed by the optical fiber holders 34 to rotate in the same direction in synchronization. The power supply unit 12 is electrically connected with the central control unit 8, the multiple electrode pair heating units 9, the stepping motor control unit 10 and the rotating motor control unit 11 through wires, supplies power to the central control unit 8, the multiple electrode pair heating units 9, the stepping motor control unit 10, the rotating motor control unit 11 and other devices, and the power supply unit 12 comprises a power supply. The intelligent control system is also provided with a key unit 15 and an LCD display unit 16, wherein the key unit 15 and the LCD display unit 16 are respectively connected with the central control unit 8 through control circuits, the key unit 15 is provided with keys used for sending different function instructions to the central control unit 8, and the LCD display unit 16 is provided with an LCD display screen used for displaying data such as the current working mode, the current step, the rotating speed of the rotating motor 32, the moving speed of the stepping motor 31, the exciting arc power of a plurality of groups of electrodes 4, the time and the like. It should be noted that the heating unit 9 includes a plurality of electrode pairs 4, and the stepping motor control unit 10 and the rotating motor control unit 11 are conventional motor control units.
A method of using the above-mentioned apparatus for manufacturing a long tapered optical fiber, comprising the steps of:
step (1): the two ends of the rod-shaped optical fiber 5 are respectively placed in a pair of optical fiber clamps 34 to be clamped; the stepping motor 31 is started, and the optical fiber traction seat 33 connected with the stepping motor 31 is driven to move through the stepping motor 31 to straighten the rod-shaped optical fiber 5; the rod-shaped optical fiber 5 and the power output shafts of the pair of rotating motors 32 are ensured to be coaxial;
step (2): starting the rotating motor 32, driving the rod-shaped optical fibers 5 fixed by the pair of optical fiber clamps 34 to synchronously rotate in the same direction, and controlling the rotating speed of the rotating motor 32 to be 300 r/min-900 r/min;
and (3): starting a central control unit 8 and a plurality of groups of electrode pairs 4, wherein the central control unit 8 controls the symmetrical electrodes on the left and right sides of the plurality of groups of electrode pairs 4 to work, the electrode exciting arc power is controlled to be 50 mW-200 mW, the discharge time is controlled to be 0.1 s-1.5 s, the rod-shaped optical fiber 5 is heated, meanwhile, a pair of stepping motors 31 drive optical fiber drawing seats 33 connected with the rod-shaped optical fiber to synchronously move the pair of optical fiber drawing seats 33 to the left and right sides respectively, the moving speed is controlled to be 100 mu m/s-300 mu m/s, and the rod-shaped optical fiber 5 is drawn to form a tapered zone structure 13 on the left and right sides of the rod-shaped optical fiber 5;
and (4): the central control unit 8 controls the electrodes symmetrically positioned at the left and right sides of the plurality of electrode pairs 4 to stop working, controls the electrodes positioned at the middle section of the plurality of electrode pairs 4 to start working, controls the electrode exciting arc power to be 10 mW-150 mW, controls the discharge time to be 0.1 s-1.5 s, heats the rod-shaped optical fiber 5 between the two conical areas, simultaneously drives the optical fiber drawing bases 33 connected with the electrode exciting arc power through a pair of stepping motors 31, respectively leads the pair of optical fiber drawing bases 33 to synchronously move towards the left and right sides, controls the moving speed to be 20 mu m/s-100 mu m/s, draws the rod-shaped optical fiber 5, and leads the two conical areas of the rod-shaped optical fiber 5 to form a waist region structure 14; a long tapered optical fiber is obtained.
As a preferred embodiment, a method of using the above-described apparatus for manufacturing an elongated tapered optical fiber, comprises the steps of:
step (1): the two ends of the rod-shaped optical fiber 5 are respectively placed in a pair of optical fiber clamps 34 to be clamped; starting a pair of stepping motors 31, driving an optical fiber traction seat 33 connected with the stepping motors 31 to synchronously move towards the left side and the right side at a speed controlled within 10 mu m/s-20 mu m/s until the rod-shaped optical fiber 5 is straightened, and further ensuring that the rod-shaped optical fiber 5 and a power output shaft of a pair of rotating motors 32 are coaxial;
step (2): starting the rotating motor 32, driving the rod-shaped optical fibers 5 fixed by the pair of optical fiber clamps 34 to synchronously rotate in the same direction, and controlling the rotating speed of the rotating motor 32 to be 300 r/min-450 r/min;
and (3): starting a central control unit 8 and a plurality of groups of electrode pairs 4, wherein the central control unit 8 controls the electrode pairs 42 which are symmetrically positioned at the outermost sides at the left and right sides of the plurality of groups of electrode pairs 4 to work, the electrode excitation arc power is controlled to be 50-100 mW, the discharge time is controlled to be 0.8-1.2 s, the rod-shaped optical fiber 5 is heated, meanwhile, a pair of stepping motors 31 are used for driving optical fiber drawing seats 33 connected with the rod-shaped optical fiber to respectively move towards the left and right sides synchronously, the moving speed is controlled to be 100-150 mu m/s, and the rod-shaped optical fiber 5 is drawn to respectively form a cone region structure 13 at the left and right sides of the rod-shaped optical fiber 5;
and (4): the central control unit 8 controls the electrode pairs 42 located at the outermost sides symmetrically on the left and right sides of the plurality of electrode pairs 4 to stop working, controls the electrode pairs 43 located at the middle section of the plurality of electrode pairs 4 to start working, controls the electrode excitation arc power to be 10 mW-50 mW, controls the discharge time to be 0.1 s-0.8 s, heats the rod optical fiber 5 between the two tapered sections, drives the fiber drawing bases 33 connected with the electrode excitation arc power through a pair of stepping motors 31, synchronously moves the pair of fiber drawing bases 33 to the left and right sides respectively, controls the moving speed to be 70 μm/s-100 μm/s, draws the rod optical fiber 5, and forms the waist region structure 14 between the two tapered sections of the rod optical fiber 5.
In the present embodiment, the rod-shaped optical fiber 5 is a single clad multimode optical fiber. Preferably, the single-clad multimode optical fiber has a cladding outer diameter of 125 μm and a core outer diameter of 50 μm.
In this embodiment, the rod-shaped optical fiber 5 is clamped in the optical fiber clamp 34 for a length of 8mm, and the clamping length can be 5-10 mm; after the rod-shaped optical fiber 5 is straightened, the length of the rod-shaped optical fiber 5 between the pair of optical fiber clamps 34 is 100mm, and the length thereof ranges from 50mm to 200 mm.
In this embodiment, step (5) is repeated, and the rod-shaped optical fibers 5 between two tapered regions are all formed into the waist structure 14 of the long tapered optical fiber, so as to obtain the long tapered optical fiber with the required specification.
In this embodiment, as shown in FIG. 7, the long tapered optical fiber obtained by the method of the present invention has a waist length of 100 to 150mm, a taper length of 0.1 to 0.5mm, a waist outer diameter of 35 to 45 μm, a waist outer diameter tolerance of 5 to 8%, and a taper symmetry coefficient of 0.95 to 1.05.
The invention provides a manufacturing device of a long tapered optical fiber and a using method thereof, which overcome the obvious defects of the traditional method, the waist length of the manufactured long tapered optical fiber is 100-150 mm, which is far longer than the existing 2.5mm, the cone area symmetry coefficient of the manufactured long tapered optical fiber is 0.95-1.05, and the cone area symmetry coefficient of the existing product is 0.9-0.5 or 1.7-3.7, so that the manufacturing of the tapered optical fiber with the waist length reaching the millimeter level and high symmetry is realized, and the technical requirements of a high-performance optical fiber sensor are met.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. A manufacturing installation of the long conical optic fibre, it includes the base (1), connects the linear guide rail (2) set up on the said base (1), and a pair of optic fibre draw gear (3) that the left and right sides is relatively set up, characterized by that, it also includes the electrode pair of the multiunit (4), the quantity of the said electrode pair (4) is at least three groups, and equip the interval setting side by side, heat the claviform optic fibre (5) that is grasped between a pair of said optic fibre draw gear (3); the pair of optical fiber traction devices (3) is provided with a pair of stepping motors (31), a pair of rotating motors (32), a pair of optical fiber traction seats (33) and a pair of optical fiber clamps (34); the optical fiber traction seat (33) is provided with a groove (331) and a threaded hole (332), the groove (331) is in sliding adaptive connection with the linear guide rail (2), a power output shaft of the rotating motor (32) is coaxially connected with one end of a screw rod (6), the other end of the screw rod (6) is in adaptive threaded connection with the threaded hole (332), the screw rod (6) is arranged in parallel with the linear guide rail (2), and the stepping motor (31) drives the optical fiber traction seat (33) to move left and right along the linear guide rail (2) through the screw rod (6); the optical fiber traction seat (33) is provided with the rotating motor (32) in an installing and connecting manner, the rotating motor (32) drives the optical fiber clamp (34) to rotate, and a power output shaft of the rotating motor (32) is arranged in parallel with the linear guide rail (2); the power output shaft of the rotating motor (32) is coaxially connected with one end of the optical fiber clamp (34), the other end of the optical fiber clamp (34) is used for clamping one end of the rod-shaped optical fiber (5), and a pair of optical fiber clamps (34) are respectively used for clamping and fixing two ends of the rod-shaped optical fiber (5); after the rod-shaped optical fiber (5) is straightened by the optical fiber clamp (34), the rod-shaped optical fiber (5) and a power output shaft of the pair of rotating motors (32) are coaxial, a connecting line of two electrode tips (41) of each group of the electrode pairs (4) and the rod-shaped optical fiber (5) are arranged in a crossed and vertical mode, and the two electrode tips (41) of each group of the electrode pairs (4) are symmetrically arranged relative to the rod-shaped optical fiber (5);
the manufacturing device of the long tapered optical fiber further comprises an intelligent control system, the intelligent control system is provided with a central control unit (8), a plurality of groups of electrode pair heating units (9), a stepping motor control unit (10), a rotating motor control unit (11) and a power supply unit (12), and the central control unit (8) is respectively connected with the plurality of groups of electrode pair heating units (9), the stepping motor control unit (10) and the rotating motor control unit (11) through control circuits; the power supply unit (12) is electrically connected with the central control unit (8), the heating unit (9) with the multiple groups of electrode pairs, the stepping motor control unit (10) and the rotating motor control unit (11) through leads respectively;
the use method of the manufacturing device of the long-cone-shaped optical fiber comprises the following steps:
step (1): clamping the two ends of the rod-shaped optical fiber (5) in a pair of optical fiber clamps (34); turning on the stepping motor (31), and driving the optical fiber traction seat (33) connected with the stepping motor (31) to move through the stepping motor to straighten the rod-shaped optical fiber (5);
step (2): simultaneously starting a pair of rotating motors (32) to drive the rod-shaped optical fibers (5) fixed by the pair of optical fiber clamps (34) to synchronously rotate in the same direction, wherein the rotating speed of the rotating motors (32) is controlled to be 300 r/min-900 r/min;
and (3): the central control unit (8) and a plurality of groups of the electrode pairs (4) are started, the central control unit (8) controls the symmetrical electrodes on the left and the right sides of the plurality of groups of the electrode pairs (4) to work, the electrode exciting arc power is controlled to be 50 mW-200 mW, the discharge time is controlled to be 0.1 s-1.5 s, the rod-shaped optical fiber (5) is heated, meanwhile, the optical fiber drawing bases (33) connected with the electrode exciting arc power are driven by a pair of stepping motors (31), the pair of the optical fiber drawing bases (33) are respectively moved towards the left and the right synchronously, the moving speed is controlled to be 100 mu m/s-300 mu m/s, the rod-shaped optical fiber (5) is drawn, and the rod-shaped optical fiber (5) forms a cone area structure (13) on the left and the right respectively;
and (4): the central control unit (8) controls the symmetrical electrodes at the left and the right sides of the plurality of groups of electrode pairs (4) to stop working, controls the electrodes at the middle section of the plurality of groups of electrode pairs (4) to start working, controls the exciting arc power of the electrodes to be between 10 and 150mW, controls the discharge time to be between 0.1 and 1.5s, heating the rod-shaped optical fiber (5) between the two conical areas, simultaneously driving the optical fiber drawing seats (33) connected with the rod-shaped optical fiber by a pair of stepping motors (31) to make the pair of optical fiber drawing seats (33) respectively move towards the left and the right synchronously, the moving speed is controlled to be 20-100 mu m/s, drawing said rod-shaped optical fiber (5) such that a waist structure (14) is formed between two of said tapered regions of said rod-shaped optical fiber (5), resulting in said long tapered optical fiber.
2. The apparatus for manufacturing an elongated tapered optical fiber according to claim 1, wherein a plurality of sets of the electrode pairs (4) are disposed in a middle region of the rod-shaped optical fiber (5).
3. The apparatus for manufacturing a long tapered optical fiber according to claim 1, wherein the linear guide (2) is a micro linear guide, and the precision of the linear guide (2) is 1 μm.
4. The apparatus for manufacturing a long tapered optical fiber according to claim 1, wherein the number of the electrode pairs (4) is seven, and the distance between the adjacent electrode pairs (4) is 0.2 to 0.5 mm.
5. The apparatus for manufacturing a long tapered optical fiber according to claim 1, wherein the electrode tips (41) of each of the electrode pairs (4) are in an inwardly depressed circular arc structure (411) and are disposed opposite to each other.
6. The apparatus for manufacturing a long tapered optical fiber according to claim 1, wherein the optical fiber drawing base (33) further defines a through hole (333), one end of the optical fiber clamp (34) is coaxially connected to a power output shaft of the rotating motor (32), the other end of the optical fiber clamp (34) passes through the through hole (333) and protrudes out, and the through hole (333) and the optical fiber clamp (34) are connected in a rolling manner through a bearing (7).
7. The apparatus for manufacturing an elongated tapered optical fiber according to claim 1, wherein the method for using the apparatus for manufacturing an elongated tapered optical fiber comprises the steps of:
step (1): clamping the two ends of the rod-shaped optical fiber (5) in a pair of optical fiber clamps (34); starting a pair of stepping motors (31), and driving the optical fiber drawing seat (33) connected with the stepping motors (31) to synchronously move to the left and the right at a speed controlled within 10-20 mu m/s until the rod-shaped optical fiber (5) is straightened;
step (2): simultaneously starting a pair of rotating motors (32) to drive the rod-shaped optical fibers (5) fixed by the pair of optical fiber clamps (34) to synchronously rotate in the same direction, wherein the rotating speed of the rotating motors (32) is controlled to be 300 r/min-450 r/min;
and (3): the central control unit (8) and a plurality of groups of the electrode pairs (4) are started, the central control unit (8) controls the symmetrical electrodes on the left and the right sides of the plurality of groups of the electrode pairs (4) to work, the electrode exciting arc power is controlled to be 50-100 mW, the discharge time is controlled to be 0.8-1.2 s, the rod-shaped optical fiber (5) is heated, the optical fiber drawing bases (33) connected with the rod-shaped optical fiber are driven by a pair of stepping motors (31), the pair of the optical fiber drawing bases (33) are respectively moved towards the left and the right synchronously, the moving speed is controlled to be 100-150 mu m/s, the rod-shaped optical fiber (5) is drawn, and the rod-shaped optical fiber (5) forms a cone area structure (13) on the left and the right respectively;
and (4): the central control unit (8) controls the symmetrical electrodes on the left and right sides of a plurality of groups of the electrode pairs (4) to stop working, controls the electrodes on the middle section of the plurality of groups of the electrode pairs (4) to start working, controls the electrode exciting arc power to be 10-50 mW, controls the discharge time to be 0.1-0.8 s, heats the rod-shaped optical fiber (5) between the two conical areas, simultaneously drives the optical fiber drawing seat (33) connected with the optical fiber drawing seat through a pair of stepping motors (31), synchronously moves a pair of the optical fiber drawing seats (33) to the left and right sides respectively, controls the moving speed to be 70-100 mu m/s, draws the rod-shaped optical fiber (5), and forms a waist region structure (14) between the two conical areas of the rod-shaped optical fiber (5); and obtaining the long tapered optical fiber.
8. The apparatus for manufacturing an elongated tapered optical fiber according to claim 1, wherein the rod-shaped optical fiber (5) is a single clad multimode optical fiber.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS55151609A (en) * | 1979-05-16 | 1980-11-26 | Nippon Telegr & Teleph Corp <Ntt> | Discharge fusion-weld splicing method of optical fiber |
| JPS5891403A (en) * | 1981-11-26 | 1983-05-31 | Toshiba Corp | Optical fiber working device |
| JPH04154643A (en) * | 1990-10-19 | 1992-05-27 | Furukawa Electric Co Ltd:The | Static eraser for optical fiber |
| CN103477261A (en) * | 2011-01-19 | 2013-12-25 | 3Sae科技公司 | Multi-stage fiber processing system and method |
| CN104153012A (en) * | 2014-07-14 | 2014-11-19 | 厦门大学 | Conical micro-nanofiber preparation device and conical micro-nanofiber preparation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130236153A1 (en) * | 2012-03-06 | 2013-09-12 | The Royal Institution For The Advancement Of Learning / Mcgill University | Method of manufacturing optical fibers, tapered optical fibers and devices thereof |
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2020
- 2020-12-29 CN CN202011597927.XA patent/CN112666658B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55151609A (en) * | 1979-05-16 | 1980-11-26 | Nippon Telegr & Teleph Corp <Ntt> | Discharge fusion-weld splicing method of optical fiber |
| JPS5891403A (en) * | 1981-11-26 | 1983-05-31 | Toshiba Corp | Optical fiber working device |
| JPH04154643A (en) * | 1990-10-19 | 1992-05-27 | Furukawa Electric Co Ltd:The | Static eraser for optical fiber |
| CN103477261A (en) * | 2011-01-19 | 2013-12-25 | 3Sae科技公司 | Multi-stage fiber processing system and method |
| CN104153012A (en) * | 2014-07-14 | 2014-11-19 | 厦门大学 | Conical micro-nanofiber preparation device and conical micro-nanofiber preparation method |
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