Mixed-mode optical fiber jumper wire for solid ultraviolet laser

Abstract

The utility model discloses a mixed-mode optical fiber jumper wire for a solid ultraviolet laser, which belongs to the technical field of solid ultraviolet lasers and comprises a multimode optical fiber, a protective tube is wrapped on the outer surface of the multimode optical fiber, and two ends of the multimode optical fiber are respectively connected with a working end connector and a laser end connector. The laser end connector comprises a connecting plug, one end of the connecting plug is connected with a tail connecting pipe, one end, far away from the connecting plug, of the tail connecting pipe is connected with the protection pipe, a fiber winding device is arranged in the tail connecting pipe and between the connecting plug and the protection pipe, and one end of the multimode optical fiber is wound on the fiber winding device and then fixed with the connecting plug. The multimode optical fiber can naturally form a continuous macro bend after being wound on the fiber winding device, and continuous macro bend overflow loss can be generated after light is transmitted. By utilizing the characteristic, the fiber winding device is additionally arranged on the basis of a conventional multimode optical fiber patch cord, so that the mixed-mode optical fiber patch cord is obtained, when ultraviolet light is spread in the mixed-mode optical fiber patch cord, the number of transmission modes is increased after disorder, and the quality of an output light beam is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid ultraviolet lasers, in particular to a mixed-mode optical fiber jumper used for solid ultraviolet lasers. Background Art

[0002] Solid-state ultraviolet lasers usually use the technical principle of frequency doubling to obtain ultraviolet laser spectra. The output wavelength is usually 266nm, 355nm, etc., and needs to be used with a multimode fiber jumper as an output pigtail. The transmission mode refers to the propagation method and path of light in the optical fiber. When multimode fiber is used with a laser, its output wavelength is a fixed value. Due to the number of transmission modes, it is necessary to pay attention to the quality of the laser output beam. The wavelength of ultraviolet light is shorter and the dispersion generated by propagation in the optical fiber is smaller, resulting in fewer transmission modes when ultraviolet light propagates in the optical fiber, making the quality of the laser output beam poor. Utility Model Content

[0003] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to propose a mixed-mode fiber jumper for solid ultraviolet lasers, which can obtain an output beam with better beam quality, more uniform energy distribution and more concentrated spot size.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a mixed-mode optical fiber jumper for a solid ultraviolet laser, a multimode optical fiber, wherein a protective tube is wrapped on the outer surface of the multimode optical fiber, and two ends of the multimode optical fiber are respectively connected to a working end connector and a laser end connector; the laser end connector comprises a plug connector, one end of the plug connector is connected to a tail tube, and the end of the tail tube away from the plug connector is connected to the protective tube, a fiber winding device is provided in the tail tube and between the plug connector and the protective tube, and one end of the multimode optical fiber is wound around the fiber winding device and then fixed to the plug connector.

[0006] An optimal technical solution of the utility model is that the fiber winding device comprises a winding column, both ends of the winding column are provided with limit blocks, and a winding cavity is formed between the limit blocks at both ends.

[0007] An optimal technical solution of the utility model is that a guide channel is provided on the limit block.

[0008] A preferred technical solution of the utility model is that the number of turns of the multimode optical fiber on the winding rod is at least 3.

[0009] An optimal technical solution of the present utility model is that the winding device is made of ABS material.

[0010] The beneficial effects of the utility model are:

[0011] The utility model provides a mixed-mode optical fiber jumper for solid ultraviolet lasers. After the multimode optical fiber is wound on the fiber winding device, continuous macrobends will naturally form, and continuous macrobend overflow loss can be generated after light is passed. Utilizing this characteristic, a fiber winding device is added to the conventional multimode optical fiber jumper to obtain a mixed-mode optical fiber jumper. When ultraviolet light propagates in the mixed-mode optical fiber jumper, the number of transmission modes increases after being confused, so that the quality of the output light beam is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of a mixed-mode optical fiber jumper for a solid ultraviolet laser provided by a specific embodiment of the utility model;

[0013] Figure 2 It is a partial cross-sectional view of a mixed-mode optical fiber jumper for a solid ultraviolet laser provided by a specific embodiment of the utility model;

[0014] Figure 3 It is a structural schematic diagram of a fiber winding device for a mixed-mode optical fiber jumper for a solid ultraviolet laser provided by a specific embodiment of the utility model;

[0015] In the figure:

[0016] 1. Multimode optical fiber; 2. Protection tube; 3. Working end connector; 4. Laser end connector; 5. Plug connector; 6. Tail tube; 7. Fiber winding device; 8. Winding column; 9. Limit block; 10. Winding cavity; 11. Guide channel. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0018] As shown in the figure, this embodiment provides a mixed-mode fiber jumper for solid ultraviolet lasers, including a multimode optical fiber 1, the outer surface of the multimode optical fiber 1 is wrapped with a protective tube 2, and the two ends of the multimode optical fiber 1 are respectively connected to a working end connector 3 and a laser end connector 4; the laser end connector 4 includes a plug connector 5, one end of the plug connector 5 is connected to a tail connector 6, and the end of the tail connector 6 away from the plug connector 5 is connected to the protective tube 2, and the tail connector 6 is provided with ABS material inside and between the plug connector 5 and the protective tube 2, which is integrally formed by 3D printing. A fiber winding device 7, one end of the multimode optical fiber 1 is wound with the fiber winding device 7 and then fixed to the plug connector 5.

[0019] The fiber winding device 7 includes a winding column 8, both ends of which are provided with limit blocks 9, a winding cavity 10 is formed between the limit blocks 9 at both ends, and a guide channel 11 is provided on the limit blocks 9. The multimode optical fiber 1 is wound on the winding column 8 located in the winding cavity 10. When in use, the multimode optical fiber 1 needs to be wound in the winding cavity for at least 3 turns, and then extended to both sides through the guide channel 11 after the glue is applied and cured;

[0020] Light propagates at a critical propagation angle in the straight part of the multimode optical fiber 1, but the propagation angle formed at the boundary of the curved part is greater than the critical value, resulting in failure to meet the total internal reflection condition, that is, part of the light will overflow from the core layer of the multimode optical fiber 1, which is called macrobend overflow loss. Research experiments have found that the macrobend overflow loss of the multimode optical fiber has a certain optimization effect on the quality of its output light beam. After the multimode optical fiber 1 is wound on the fiber winding device 7, continuous macrobends will naturally form, and continuous macrobend overflow loss will be generated after light is passed. Utilizing this characteristic, a fiber winding device 7 is added to the conventional multimode optical fiber jumper to obtain a mixed-mode optical fiber jumper. Mixed mode means that the transmission mode of light is confused.

[0021] When ultraviolet light propagates in mixed-mode fiber jumpers, the number of transmission modes increases after being confused, which effectively improves the quality of the output beam. When mixed-mode fiber jumpers are used as output pigtails for solid-state ultraviolet lasers, output beams with better beam quality, more uniform energy distribution, and more concentrated spot sizes can be obtained.

[0022] In addition, the fiber winding device 7 has a small appearance and a simple structure. It is designed and processed according to the size of the metal tail tube 6 and can be embedded in the metal tail tube 6 to form a whole, thereby realizing important functions in a limited space.

[0023] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A mixed-mode optical fiber jumper for solid-state ultraviolet lasers, characterized in that: It comprises a multimode optical fiber (1), the outer surface of the multimode optical fiber (1) is wrapped with a protective tube (2), and the two ends of the multimode optical fiber (1) are respectively connected to a working end connector (3) and a laser end connector (4); The laser end connector (4) comprises a plug connector (5), one end of the plug connector (5) is connected to a tail tube (6), one end of the tail tube (6) away from the plug connector (5) is connected to the protective tube (2), a fiber winding device (7) is provided inside the tail tube (6) and between the plug connector (5) and the protective tube (2), and one end of the multimode optical fiber (1) is wound around the fiber winding device (7) and then fixed to the plug connector (5).

2. The mixed-mode optical fiber jumper for solid-state ultraviolet laser according to claim 1, characterized in that: The fiber winding device (7) comprises a winding column (8), both ends of which are provided with limit blocks (9), and a winding cavity (10) is formed between the limit blocks (9) at the two ends.

3. The mixed-mode optical fiber jumper for solid-state ultraviolet laser according to claim 2, characterized in that: The limiting block (9) is provided with a guide channel (11).

4. The mixed-mode optical fiber jumper for solid-state ultraviolet laser according to claim 3, characterized in that: The number of turns of the multimode optical fiber (1) on the winding rod (8) is at least 3.

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