Preparation device of hot melting optical fiber bundle

Abstract

The utility model discloses a preparation device of a hot melting optical fiber bundle, which comprises a small graphite furnace, a shaping chuck and a fixed chuck which are arranged from top to bottom, a graphite heater is arranged in the small graphite furnace, a protective gas joint is arranged at the top of the small graphite furnace, and a material inlet is arranged at the bottom of the small graphite furnace. The material inlet, the shaping chuck and the fixed chuck are concentrically arranged, the fixed chuck is arranged on a first lifting assembly, the fixed chuck is used for clamping a to-be-processed optical fiber bundle, the first lifting assembly drives the fixed chuck to reciprocate in the axial direction of the small graphite furnace, the end parts of a plurality of clamping jaws of the shaping chuck are all provided with shaping cambered surfaces, and the shaping cambered surfaces are used for clamping the to-be-processed optical fiber bundle. The plurality of shaping arc surfaces are matched to form a shaping circular ring. According to the utility model, the negative influence caused by the traditional chemical glue can be eliminated, so that the melting phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber bundle preparation, in particular to a preparation device for a hot-melt optical fiber bundle. Background Art

[0002] The fused silica fiber bundle is a new type of fiber bundle. Compared with the traditional quartz fiber bundle, it has excellent temperature resistance and stability. Therefore, it will have broad application value in the field of laser projection display and high-power laser transmission in the future.

[0003] At present, the main end of the optical fiber bundling realizes multi-fiber coupling output laser to improve the luminous intensity. However, as the number of optical fibers increases and the power of the laser increases, the ordinary physical gluing scheme often cannot withstand the long-term output process of the high-power laser, which can easily lead to the failure of the glue due to heat and cause local accumulation of heat, thus making the optical fiber bundling device fail. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a preparation device for a hot-melt optical fiber bundle, which can eliminate the negative effects brought by traditional chemical glue, thereby avoiding the occurrence of burning and melting.

[0005] In order to solve the above technical problems, the utility model provides a preparation device for a hot-melt optical fiber bundle, comprising a small graphite furnace, a shaping chuck and a fixed chuck arranged from top to bottom, wherein a graphite heater is arranged in the small graphite furnace, a protective gas joint is arranged at the top of the small graphite furnace, and a material inlet is arranged at the bottom, the material inlet, the shaping chuck and the fixed chuck are arranged concentrically, the fixed chuck is arranged on a first lifting assembly, the fixed chuck is used to clamp the optical fiber bundle to be processed, the first lifting assembly drives the fixed chuck to reciprocate along the axial direction of the small graphite furnace, and the ends of multiple claws of the shaping chuck are all provided with shaping arc surfaces, and the multiple shaping arc surfaces cooperate to form a shaping ring.

[0006] Furthermore, the small graphite furnace is arranged on the top of the support frame, and the shaping chuck and the first lifting assembly are arranged on the inner side wall of the support frame.

[0007] Furthermore, the shaping chuck is arranged on a second lifting assembly, and the second lifting assembly is connected to the support frame.

[0008] Furthermore, the second lifting assembly includes a second slide rail and a second slide seat arranged on the second slide rail, a mounting platform is arranged on the second slide seat, the shaping chuck is vertically fixedly arranged on the mounting platform, the first lifting assembly includes a first slide rail and a first slide seat arranged on the first slide rail, the fixing chuck is vertically fixedly arranged on the first slide seat.

[0009] Furthermore, locking bolts are provided on both the first slide seat and the second slide seat.

[0010] Furthermore, an upper limit block and a lower limit block are arranged on the first slide rail, and the first slide seat is arranged between the upper limit block and the lower limit block.

[0011] Furthermore, the shaped curved surface is polished to a mirror surface.

[0012] Furthermore, the material of the jaws is isostatic graphite.

[0013] Beneficial effects of the utility model:

[0014] Through the cooperation of the fixed chuck and the first lifting assembly, the optical fiber bundle to be processed can be clamped and sent to a small graphite furnace for hot melting and softening. After softening, it can also be taken out to the shaping chuck for shrinkage and shaping, so that the internal arrangement of the optical fiber approaches a hexagonal honeycomb structure. During the tightening process, the optical fiber cladding is gradually hot-melted and combined into one. Therefore, by directly melting the optical fiber end face into a bundle, the use of chemical glue is avoided, and the negative effects of traditional chemical glue are eliminated, thereby avoiding burning, so that the optical fiber bundle can operate stably during the long-term output of high-power laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the shaping chuck of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the utility model when heating;

[0019] Figure 5 It is a schematic diagram of the structure of the utility model when it is finalized;

[0020] Figure 6 It is a schematic diagram of the structure of the utility model when it is withdrawn as a whole;

[0021] Figure 7 It is a schematic diagram of the cross-sectional structure of the optical fiber bundle after the utility model is finalized. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0023] Reference Figures 1 to 5 As shown, an embodiment of the preparation device of the hot-melt optical fiber bundle of the utility model comprises a small graphite furnace 1, a shaping chuck 2 and a fixed chuck 3 arranged from top to bottom, a graphite heater 4 is arranged in the small graphite furnace, a protective gas connector 5 is arranged on the top of the small graphite furnace, and a material inlet 6 is arranged on the bottom. The material inlet, the shaping chuck and the fixed chuck are arranged concentrically, and the fixed chuck is arranged on the first lifting assembly 7. The fixed chuck is used to clamp the optical fiber bundle 8 to be processed, and the first lifting assembly drives the fixed chuck to reciprocate along the axial direction of the small graphite furnace.

[0024] The above-mentioned optical fiber bundle to be processed is formed by multiple quartz optical fibers inserted into a quartz tube. The graphite heater is used to heat the end of the optical fiber bundle to be processed. While heating, the protective gas is connected through the protective gas connector, which can be argon. The small graphite furnace does not need to be operated in a vacuum state. A water cooling component is arranged in its outer shell, and thermal insulation felt is arranged at the bottom and the top. During processing, the optical fiber bundle to be processed is first clamped on the fixed chuck, and the extended length is ensured to enter the middle of the graphite heater. Then the fixed chuck is pushed, and the optical fiber bundle to be processed moves upward through the shaping chuck and the material inlet and extends into the middle of the graphite heater. Refer to Figure 4 As shown, the graphite heater is then powered on to heat and soften the end of the optical fiber bundle to be processed, and a protective gas is introduced during the process. After the softening is completed, the shaping chuck is pushed down and moved, and the softened end of the optical fiber bundle to be processed is located in the shaping chuck, refer to Figure 5 As shown in the figure, when the outer tube or fiber cladding softens, the core diameter and shape remain unchanged, and the shaping chuck is operated to clamp the softened end, so that the outer diameter of the softened end shrinks, and the outer quartz tube shrinks to tighten the fiber into one. During the tightening process, the fiber cladding gradually melts and the arrangement approaches a hexagonal honeycomb structure. Figure 7 shown.

[0025] Among them, the ends of the multiple jaws 10 of the shaping chuck are all provided with shaping arc surfaces 9. After the multiple jaws are abutted, the multiple shaping arc surfaces cooperate to form a shaping ring, so that the required shrinkage diameter can be obtained. The shaping ring is consistent with the diameter after shrinkage. The size can be calculated according to the shrinkage ratio. It is a prior art and will not be described in detail. And because the softened part has a higher temperature, it is necessary to select a high-temperature resistant metal material higher than the heating temperature for the selection of the jaws, such as tungsten steel, titanium alloy, etc. Of course, isostatic graphite material can also be selected, and the shaping arc surface is polished to a mirror surface, which can effectively avoid the adhesion caused by high temperature.

[0026] For ease of implementation, a small graphite furnace is arranged on the top of a support frame 111, and a shaping chuck and a first lifting assembly are arranged on the inner side wall of the support frame to form a whole. Specifically, the shaping chuck is arranged on the second lifting assembly 11, and the second lifting assembly is connected to the support frame. The second lifting assembly includes a second slide rail 12 and a second slide seat 13 arranged on the second slide rail, and a mounting platform 14 is arranged on the second slide seat, and the shaping chuck is vertically fixed on the mounting platform. The first lifting assembly includes a first slide rail 15 and a first slide seat 16 arranged on the first slide rail, and the fixed chuck is vertically fixed on the first slide seat. Locking bolts are also arranged on both the first slide seat and the second slide seat for position locking.

[0027] Reference Figure 6 As shown, the second lifting assembly can drive the shaping chuck and the first lifting assembly to move downward as a whole, thereby being away from the small graphite furnace, forming a larger operating space, making it easy to observe the clamping state of the shaping chuck, and also convenient for repair and maintenance. The specific lifting and moving method of the first lifting assembly and the second lifting assembly is the existing method and will not be described in detail.

[0028] In order to improve the convenience and efficiency of operation, an upper limit block 17 and a lower limit block 18 are arranged on the first slide rail, and the first slide seat is arranged between the upper limit block and the lower limit block. The upper limit block is set at a position that can limit the end of the optical fiber bundle to be processed to extend into the graphite heater, thereby ensuring the accuracy of the heating position. The lower limit block can limit the softened end of the optical fiber bundle to be processed to be located in the shaping chuck after exiting the heating, and can be operated into place in a very short time during the exiting heating process (the first slide seat is in place when it contacts the lower limit block), and then the shaping chuck is operated to clamp. The whole process can be completed within 3S, avoiding the temperature of the optical fiber bundle to be processed from dropping too low after exiting, thereby reducing the difficulty of operation and ensuring the preparation quality.

[0029] In one embodiment, the same batch of optical fibers is used to prepare a fused silica optical fiber bundle sample A and a glued silica optical fiber bundle sample B, and a comparative test is performed.

[0030] A high-power laser light source is used to couple the laser into the fiber bundle sample A and the fiber bundle sample B in the same way. A beam quality analyzer is used to detect the total end output energy distribution of the fiber bundle samples A and B. The ratio of the output power density of the corresponding fiber positions of the fiber bundle samples A and B is about 1.2 to 1.3 times. The ratio remains unchanged when the optical fibers of each end of sample A are randomly tested. This proves that the end face of the hot-melt silica fiber bundle sample A is a molten structure (after the fiber bundle melts and shrinks, the shape of the end face of a single optical fiber changes from a circle to an inscribed hexagon, the effective transmission area becomes smaller, and the transmission power density increases).

[0031] In the same test time (≥1 hour), the end face of the glued quartz fiber bundle sample B was melted to the point of being unable to work, while the end face of the hot-melt quartz fiber bundle sample A did not change at all and could continue to transmit laser light, proving that the performance of this sample is superior to that of the traditional glued fiber bundle.

[0032] The above embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in this technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A device for preparing a hot-melt optical fiber bundle, characterized in that: It comprises a small graphite furnace, a shaping chuck and a fixed chuck arranged from top to bottom, wherein a graphite heater is arranged in the small graphite furnace, a protective gas joint is arranged on the top of the small graphite furnace, and a material inlet is arranged on the bottom, the material inlet, the shaping chuck and the fixed chuck are arranged concentrically, the fixed chuck is arranged on a first lifting assembly, the fixed chuck is used to clamp the optical fiber bundle to be processed, the first lifting assembly drives the fixed chuck to reciprocate along the axial direction of the small graphite furnace, and the ends of multiple claws of the shaping chuck are all provided with shaping arc surfaces, and the multiple shaping arc surfaces cooperate to form a shaping ring.

2. The hot-melt optical fiber bundle preparation device according to claim 1, characterized in that: The small graphite furnace is arranged on the top of the support frame, and the shaping chuck and the first lifting assembly are arranged on the inner side wall of the support frame.

3. The hot-melt optical fiber bundle preparation device according to claim 2, characterized in that: The shaping chuck is arranged on a second lifting assembly, and the second lifting assembly is connected to the supporting frame.

4. The hot-melt optical fiber bundle preparation device according to claim 3, characterized in that: The second lifting assembly includes a second slide rail and a second slide seat arranged on the second slide rail, a mounting platform is arranged on the second slide seat, and the shaping chuck is vertically fixedly arranged on the mounting platform. The first lifting assembly includes a first slide rail and a first slide seat arranged on the first slide rail, and the fixing chuck is vertically fixedly arranged on the first slide seat.

5. The hot-melt optical fiber bundle preparation device according to claim 4, characterized in that: The first slide seat and the second slide seat are both provided with locking bolts.

6. The hot-melt optical fiber bundle preparation device according to claim 4, characterized in that: An upper limit block and a lower limit block are arranged on the first slide rail, and the first slide seat is arranged between the upper limit block and the lower limit block.

7. The hot-melt optical fiber bundle preparation device according to claim 1, characterized in that: The shaped curved surface is polished to a mirror surface.

8. The hot-melt optical fiber bundle preparation device according to claim 1, characterized in that: The material of the clamping jaws is isostatic graphite.

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