Optical fiber coupling laser

Abstract

The utility model belongs to the technical field of lasers, and provides an optical fiber coupling laser which comprises a laser diode, a lens, a tube body, an adjusting ring, an optical fiber connector and a tail sleeve. The optical fiber connector comprises a steel needle, a ceramic ferrule and an optical fiber, the end, close to the pipe body, of the steel needle is coaxially sleeved with the adjusting ring, a slot is formed in the end, close to the pipe body, of the steel needle, the ceramic ferrule is fixed in the slot, the optical fiber is inserted into the steel needle, the end, close to the pipe body, of the optical fiber is flush with the end, close to the pipe body, of the ceramic ferrule, and the end, away from the pipe body, of the optical fiber extends to the outer side of the tail sleeve. The included angle between the axis of the ceramic ferrule and the axis of the steel needle is 1.7-5.7 degrees, and the included angle between the end face of one end, close to the tube body, of the steel needle and the end face of one end, close to the tube body, of the optical fiber is 6-10 degrees. According to the laser, a certain included angle is designed between the ceramic ferrule and the steel needle, and a certain included angle is designed between the end face of the optical fiber and the end face of the steel needle, so that return light cannot be directly reflected back into the laser to cause damage to the laser.

Description

Technical Field

[0001] The utility model belongs to the technical field of lasers, and in particular relates to an optical fiber coupled laser. Background Art

[0002] The red fiber laser is a fiber laser that is coupled into an optical fiber after being focused by a lens. The client then fuses the fiber end of the red fiber laser to the input end of the high-power fiber laser, and the red light is output from the output end of the high-power fiber laser. The fiber structure design of the coupling end of the red fiber laser (the coupling end of the optical fiber connector) has a great influence on the red light spot effect at the output end of the high-power fiber laser.

[0003] In addition, when a fiber laser is processing highly reflective materials, part of the laser light will be reflected back into the laser, a phenomenon called reflected light. The reflected light may cause the core components inside the laser to continue to be heated, affecting the stability and service life of the laser. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a fiber-coupled laser, which can effectively solve the above problems.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fiber-coupled laser, including a laser diode, a lens, a tube body, an adjustment ring, a fiber connector, and a tail sleeve;

[0006] The tube body is provided with a light-guiding through hole along the axis, the light-guiding through hole comprises a columnar recessed groove, the lens is coaxially fixed in the recessed groove, the laser emitting end of the laser diode is inserted into the light-guiding through hole and abuts against the lens, the adjustment ring is coaxially fixed in the tail sleeve, and the end of the tube body away from the laser diode is inserted into the tail sleeve and abuts against the adjustment ring;

[0007] The optical fiber connector includes a steel needle, a ceramic ferrule, and an optical fiber. The steel needle is coaxially fixed in the tail sleeve, and the end of the steel needle close to the tube body is coaxially sleeved in the adjustment ring. The end of the steel needle close to the tube body is provided with a slot, and the ceramic ferrule is fixed in the slot. The optical fiber is inserted in the ceramic ferrule. The end of the optical fiber close to the tube body is flush with the end of the ceramic ferrule close to the tube body, and the optical fiber extends away from the end of the tube body to the outside of the tail sleeve. The angle between the axis of the ceramic ferrule and the axis of the steel needle is 1.7-5.7°, and the angle between the end face of the steel needle close to the tube body and the end face of the optical fiber close to the tube body is 6-10°.

[0008] Preferably, the adjustment ring is fixed to the steel needle by welding.

[0009] Preferably, the adjustment ring is fixed to the tube body by welding.

[0010] Preferably, an annular structure with a sharp cross-section is provided at one end of the tube body away from the tail sleeve, and the tube body is welded and fixed to the laser diode via the annular structure.

[0011] Preferably, the steel needle is bonded and fixed to the ceramic ferrule.

[0012] Preferably, the steel needle is bonded and fixed to the optical fiber.

[0013] Preferably, the lens is a self-focusing lens.

[0014] Preferably, the lens is bonded and fixed to the groove.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model provides a fiber-coupled laser, which can prevent the return light from being directly reflected back into the laser to cause damage to the laser by designing a certain angle between the ceramic ferrule and the steel needle, and a certain angle between the end face of the optical fiber and the end face of the steel needle, and can also improve the red light spot effect at the output end of the high-power fiber laser.

[0017] 2. The utility model provides a fiber-coupled laser, in which the direction of the coupled fiber has little effect on the power, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a fiber-coupled laser provided in an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the explosion structure of a fiber-coupled laser provided in an embodiment of the utility model;

[0020] Figure 3 A schematic cross-sectional view of a fiber-coupled laser provided in an embodiment of the utility model;

[0021] Figure 4 A schematic cross-sectional view of a fiber optic connector for a fiber-coupled laser provided in an embodiment of the utility model;

[0022] Figure 5 The present invention is a schematic diagram of a cross-sectional structure of a tube body of a fiber-coupled laser provided in an embodiment of the present invention.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Laser diode; 2. Lens; 3. Tube body; 4. Adjustment ring; 5. Fiber optic connector; 6. Tail sleeve; 31. Sink; 32. Ring structure; 51. Steel needle; 52. Ceramic ferrule; 53. Optical fiber. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with specific embodiments so that those skilled in the art can understand the present invention more clearly.

[0026] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0027] like Figure 1-5 As shown, this embodiment provides a fiber-coupled laser, including a laser diode 1, a lens 2, a tube body 3, an adjustment ring 4, a fiber connector 5, and a tail sleeve 6.

[0028] The tube body 3 is provided with a light-guiding through hole along the axis, and the light-guiding through hole includes a columnar recessed groove 31, and the lens 2 is coaxially fixed in the recessed groove 31. The laser emitting end of the laser diode 1 is inserted into the light-guiding through hole and abuts against the lens 2. For example, Figure 3 As shown, the lens 2 is a self-focusing lens, and the lens 2 is bonded and fixed to the groove 31. The right end of the laser diode 1 is inserted into the left end of the light-guiding hole and abuts against the left end of the lens 2, so that the light-emitting surface of the laser diode 1 roughly coincides with the focal plane of the lens 2.

[0029] The adjusting ring 4 is coaxially fixed in the tail sleeve 6, and the end of the tube 3 away from the laser diode 1 is inserted into the tail sleeve 6 and abuts against the adjusting ring 4. Figure 3 As shown, the right end of the tube body 3 is inserted into the left end of the tail sleeve 6 and abuts against the left end of the adjustment ring 4, and the tube body 3 and the adjustment ring 4 are welded and fixed.

[0030] The optical fiber connector 5 comprises a steel needle 51, a ceramic ferrule 52, and an optical fiber 53. The steel needle 51 is coaxially fixed in the tail sleeve 6, and one end of the steel needle 51 close to the tube body 3 is coaxially sleeved in the adjustment ring 4. For example, Figure 3 As shown, the left end of the steel needle 51 is inserted into the right end of the adjusting ring 4, the steel needle 51 and the adjusting ring 4 are automatically adjusted to the optimal position through a coupling device, and the steel needle 51 and the adjusting ring 4 are welded and fixed.

[0031] The steel needle 51 is provided with a slot at one end near the tube body 3, the ceramic ferrule 52 is crimped and fixed in the slot, the optical fiber 53 is inserted in the ceramic ferrule 52, the end of the optical fiber 53 near the tube body 3 is flush with the end of the ceramic ferrule 52 near the tube body 3, the optical fiber 53 extends to the outside of the tail sleeve 6 away from the end of the tube body 3, the axis of the ceramic ferrule 52 and the axis of the steel needle 51 are at an angle of 1.7-5.7°, and the end face of the steel needle 51 near the tube body 3 and the end face of the optical fiber 53 near the tube body 3 are at an angle of 6-10°. For example, Figure 3 As shown, the ceramic ferrule 52 is tilted at a certain angle relative to the steel needle 51, and the optical fiber 53 is also tilted at a certain angle. Specifically, the angle between the left end face of the optical fiber 53 and the left end face of the steel needle 51 is 6-10°.

[0032] In summary, the laser provided in this embodiment, by designing a certain angle between the ceramic ferrule 52 and the steel needle 51, and designing a certain angle between the end face of the optical fiber 53 and the end face of the steel needle 51, can prevent the return light from being directly reflected back into the laser to cause damage to the laser, and can also improve the red light spot effect at the output end of the high-power fiber laser.

[0033] In this embodiment, the tube body 3 is provided with a ring structure 32 with a sharp cross section at one end away from the tail sleeve 6, and the tube body 3 is welded and fixed to the laser diode 1 through the ring structure 32. Figure 3 , 5 As shown, the left end face of the tube body 3 is provided with the annular structure 32, and the left end face of the tube body 3 and the right end face of the laser diode 1 are welded and fixed through the annular structure 32, so that the welding between the tube body 3 and the laser diode 1 can be ensured to be more firm and have a longer service life.

[0034] In this embodiment, the steel needle 51 is bonded and fixed to the ceramic ferrule 52. The steel needle 51 is bonded and fixed to the optical fiber 53. For example, Figure 4 As shown, during installation, the ceramic ferrule 52 is first crimped onto the left end of the steel needle 51, and then fixed by gluing after adjusting to a suitable angle. Then the optical fiber 53 is inserted from the right end of the steel needle 51, and then the left end of the optical fiber 53 enters the ceramic ferrule 52 until the left end of the optical fiber 53 is flush with the left end of the ceramic ferrule 52, and then fixed by gluing after adjusting to a suitable angle. The gluing and fixing method is simple and efficient.

[0035] The mechanisms, components and parts not specifically described in the present invention are all existing structures in the prior art and can be directly purchased from the market.

[0036] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0037] The above is only a preferred embodiment of the utility model, and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fiber-coupled laser, characterized in that: It comprises a laser diode (1), a lens (2), a tube body (3), an adjustment ring (4), an optical fiber connector (5), and a tail sleeve (6); The tube body (3) is provided with a light-guiding through hole along the axis, the light-guiding through hole comprises a columnar recessed groove (31), the lens (2) is coaxially fixed in the recessed groove (31), the laser emitting end of the laser diode (1) is inserted into the light-guiding through hole and abuts against the lens (2), the adjustment ring (4) is coaxially fixed in the tail sleeve (6), and the end of the tube body (3) away from the laser diode (1) is inserted into the tail sleeve (6) and abuts against the adjustment ring (4); The optical fiber connector (5) comprises a steel needle (51), a ceramic ferrule (52), and an optical fiber (53). The steel needle (51) is coaxially fixed in the tail sleeve (6). The end of the steel needle (51) close to the tube body (3) is coaxially sleeved in the adjustment ring (4). The end of the steel needle (51) close to the tube body (3) is provided with a slot. The ceramic ferrule (52) is fixed in the slot. The optical fiber (53) is inserted in the ceramic ferrule (52). The end of the optical fiber (53) close to the tube body (3) is flush with the end of the ceramic ferrule (52) close to the tube body (3), the end of the optical fiber (53) away from the tube body (3) extends to the outside of the tail sleeve (6), the axis of the ceramic ferrule (52) and the axis of the steel needle (51) are at an angle of 1.7-5.7°, and the end face of the steel needle (51) close to the tube body (3) and the end face of the optical fiber (53) close to the tube body (3) are at an angle of 6-10°.

2. A fiber-coupled laser according to claim 1, characterized in that: The adjusting ring (4) is fixed to the steel needle (51) by welding.

3. A fiber-coupled laser according to claim 1, characterized in that: The adjusting ring (4) is fixed to the tube body (3) by welding.

4. A fiber-coupled laser according to claim 1, characterized in that: An annular structure (32) with a sharp cross-section is provided at one end of the tube body (3) away from the tail sleeve (6), and the tube body (3) is welded and fixed to the laser diode (1) via the annular structure (32).

5. The fiber-coupled laser according to claim 1, characterized in that: The steel needle (51) is bonded and fixed to the ceramic insert (52).

6. A fiber-coupled laser according to claim 1, characterized in that: The steel needle (51) is bonded and fixed to the optical fiber (53).

7. The fiber-coupled laser according to claim 1, characterized in that: The lens (2) is a self-focusing lens.

8. The fiber-coupled laser according to claim 1, characterized in that: The lens (2) is bonded and fixed to the sink (31).

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