Laser coupling device and laser

Abstract

The utility model belongs to the technical field of electronic components, and discloses a laser coupling device and a laser. The device comprises a coupling cylinder, a lens support, a clamping piece and a lens. The lens support is adjustably connected to the coupling cylinder along the axial position of the coupling cylinder, part of the lens support is located in the coupling cylinder, and part of the lens support extends out of the coupling cylinder so that the position of the lens support on the coupling cylinder can be adjusted. The clamping piece is sleeved outside the coupling cylinder in a position-adjustable manner and abuts against the part, extending out of the coupling cylinder, of the lens support so as to fix the lens support to the coupling cylinder. The lens is arranged on the lens support and located in the coupling cylinder so as to couple the light, and adjustment of the position of the lens in the coupling cylinder can be achieved through adjustment of the position of the lens support on the coupling cylinder. According to the laser coupling device, the position of the lens arranged in the coupling cylinder can be adjusted outside the coupling cylinder, and the debugging convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a laser coupling device and a laser. Background Art

[0002] The pump source, the laser crystal and the resonant cavity are the three key components of a laser. One of the key factors for whether a laser can emit light is whether the spot of the pump light source injected into the laser crystal matches the spot of the output laser, which can also be called the coupling effect between the pump source and the output light source. The better the coupling effect, the higher the output laser power and the better the output beam quality.

[0003] Generally, the pump source needs to be coupled into the laser crystal after changing the spot through a coupling cylinder. The inside of the coupling cylinder is a device composed of lenses, and the purpose is to shape the pump light into the shape required by the rear optical path, that is, the coupling process. The size of the coupling spot can be calculated.

[0004] However, in the actual laser debugging process, due to the machining error and the deviation between simulation and reality, the installation position of the lens needs to be adjusted repeatedly to ensure that the lens is at the best position inside the coupling cylinder. In the prior art, the structure for stably installing and adjusting the lens is relatively complex, making the adjustment operation of the lens difficult and the debugging convenience poor. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a laser coupling device and a laser, which solve the problems that the existing laser coupling device is complex to install, difficult to operate when adjusting the distance between lenses, and not convenient for debugging.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] On the one hand, a laser coupling device is provided, which is characterized by comprising: a coupling cylinder;

[0008] A lens holder, which is connected to the coupling cylinder in an axially adjustable manner along the coupling cylinder, and part of the lens holder is located inside the coupling cylinder and part extends outside the coupling cylinder;

[0009] A clamping member, which is sleeved on the outside of the coupling cylinder in a position-adjustable manner and abuts against the part of the lens holder extending outside the coupling cylinder to fix the lens holder to the coupling cylinder;

[0010] A lens, which is arranged on the lens holder and located inside the coupling cylinder.

[0011] As a preferred embodiment of the above laser coupling device, the coupling cylinder is provided with a chute extending axially, and a part of the lens holder passes through the chute and is slidably connected to the chute.

[0012] As a preferred embodiment of the above laser coupling device, the lens holder includes a mounting portion and a fixing portion. The mounting portion is disposed inside the coupling cylinder, the lens is mounted on the mounting portion, one end of the fixing portion is connected to the mounting portion, and the other end of the fixing portion passes through the chute and extends outside the coupling cylinder.

[0013] As a preferred embodiment of the above laser coupling device, the clamping member presses against one end of the fixing portion that passes through the chute.

[0014] As a preferred embodiment of the above laser coupling device, both end faces of the fixing portion are planar to form a surface contact with the clamping member.

[0015] As a preferred embodiment of the above laser coupling device, there is a clearance fit between the mounting portion and the coupling cylinder to adjust the position of the lens holder in the radial direction of the coupling cylinder.

[0016] As a preferred embodiment of the above laser coupling device, the coupling cylinder is provided with an external thread, and the clamping member is threadedly connected to the coupling cylinder.

[0017] As a preferred embodiment of the above laser coupling device, the clamping member includes a first clamping ring and a second clamping ring. The first clamping ring and the second clamping ring are mounted on both sides of the lens holder to press against the lens holder.

[0018] As a preferred embodiment of the above laser coupling device, the laser coupling device further includes an optical fiber. One end of the optical fiber is mounted on the coupling cylinder, and the other end of the optical fiber is used to connect to a pump source; and / or,

[0019] The lens includes a first lens, a second lens, and a third lens. The first lens, the second lens, and the third lens are sequentially mounted inside the coupling cylinder along the axis.

[0020] On the other hand, a laser is provided, which includes a pump source, a laser crystal, and the above laser coupling device. The pump source is mounted at one end of the coupling cylinder, and the laser crystal is disposed at the end of the laser coupling device away from the pump source.

[0021] Advantages of the present utility model:

[0022] The present utility model provides a laser coupling device and a laser, including a coupling cylinder, a lens holder, a clamping member and a lens. The lens holder is connected to the coupling cylinder in an axially adjustable manner, and a part of the lens holder is located inside the coupling cylinder, and a part extends outside the coupling cylinder to realize the adjustment of the position of the lens holder on the coupling cylinder. The clamping member is sleeved on the outside of the coupling cylinder in a position-adjustable manner, and abuts against the part of the lens holder extending outside the coupling cylinder to fix the lens holder to the coupling cylinder. The lens is arranged on the lens holder and located inside the coupling cylinder to couple light, and the adjustment of the position of the lens holder on the coupling cylinder can realize the adjustment of the position of the lens inside the coupling cylinder. The position of the lens arranged inside the coupling cylinder can be adjusted outside the coupling cylinder. After the adjustment is completed, by adaptively adjusting the clamping member outside the coupling cylinder, the clamping member abuts against the lens holder, so that the lens can be fixed inside the coupling cylinder, thereby reducing the operation difficulty of lens debugging and improving the convenience of debugging. Moreover, the lens is installed inside the coupling cylinder through the lens holder, avoiding direct contact between the lens and the clamping member, and preventing wear and damage to the lens during the installation and debugging process. Brief Description of the Drawings

[0023] Figure 1 is one of the sectional views of the laser coupling device provided by the embodiment of the present utility model;

[0024] Figure 2 is another sectional view of the laser coupling device provided by the embodiment of the present utility model;

[0025] Figure 3 is the axonometric view of the laser coupling device provided by the embodiment of the present utility model.

[0026] In the figure:

[0027] 1. Coupling cylinder; 11. Slide groove; 12. Optical fiber connector; 2. Lens holder; 21. Fixed part; 22. Mounting part; 3. Clamping member; 31. First clamping ring; 32. Second clamping ring; 4. Lens. Detailed Embodiment

[0028] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0031] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] As Figures 1-3 shown, this embodiment provides a laser coupling device, which includes a coupling cylinder 1, a lens holder 2, a clamping member 3, and a lens 4. The lens holder 2 is connected to the coupling cylinder 1 in an axially adjustable manner to realize the adjustment of the position of the lens holder 2 on the coupling cylinder 1, and a part of the lens holder 2 is located inside the coupling cylinder 1 and a part extends outside the coupling cylinder 1. The clamping member 3 is sleeved on the outside of the coupling cylinder 1 in an adjustable position and abuts against the part of the lens holder 2 extending outside the coupling cylinder 1 to fix the lens holder 2 to the coupling cylinder 1. The lens 4 is arranged on the lens holder 2 and is located inside the coupling cylinder 1 to couple light, and the adjustment of the position of the lens holder 2 on the coupling cylinder 1 can realize the adjustment of the position of the lens 4 inside the coupling cylinder 1.

[0033] The adjustment of the position of the lens 4 arranged inside the coupling cylinder 1 can be realized outside the coupling cylinder 1. After the adjustment is completed, the clamping member 3 is adaptively adjusted outside the coupling cylinder 1. During the adjustment process, the clamping member 3 can cooperate with the lens bracket 2 through the connection structure to form unilateral pressing, or the clamping member 3 can press from both sides of the lens bracket 2, so that the clamping member 3 presses against the lens bracket 2 to fix the lens 4 inside the coupling cylinder 1, thereby reducing the operation difficulty of debugging the lens 4, improving the convenience of debugging, and the lens 4 is installed inside the coupling cylinder 1 through the lens bracket 2, avoiding direct contact between the lens 4 and the clamping member 3, and preventing wear and damage to the lens 4 during the installation and debugging process.

[0034] Specifically, the coupling cylinder 1 is of a cylindrical structure. The lens bracket 2 is slidably connected to the coupling cylinder 1 along the axial direction of the coupling cylinder 1 to realize the adjustment of the position of the lens bracket 2 in the axial direction of the coupling cylinder 1. The cross-section of the lens 4 is circular and is arranged perpendicular to the axial direction of the coupling cylinder 1 so that light can pass through the lens 4. The lens 4 is fixed on the lens bracket 2 by means of bonding.

[0035] Optionally, the coupling cylinder 1 is provided with a chute 11 extending along the axial direction. A part of the lens bracket 2 is inserted into the chute 11 and slidably connected to the chute 11 so that the lens bracket 2 can move along the axial direction of the coupling cylinder 1.

[0036] Specifically, a chute 11 is axially opened on the inner wall of the coupling cylinder 1 and communicates with the outside of the coupling cylinder 1. The chute 11 is of a long strip structure. One end of the lens bracket 2 is installed in the chute 11 to realize the sliding connection between the lens bracket 2 and the coupling cylinder 1. The other end of the lens bracket 2 is placed inside the coupling cylinder 1, and the lens 4 is installed at the other end of the lens bracket 2.

[0037] Further, the lens bracket 2 includes a mounting portion 22 and a fixing portion 21. The mounting portion 22 is arranged inside the coupling cylinder 1, and the lens 4 is installed on the mounting portion 22. One end of the fixing portion 21 is connected to the mounting portion 22, and the other end of the fixing portion 21 is inserted into the chute 11 and extends outside the coupling cylinder 1.

[0038] Specifically, the mounting portion 22 is of an annular structure, and the lens 4 is bonded to one side of the mounting portion 22 along the axial direction so that the lens 4 can transmit light while being more firmly installed. The fixing portion 21 is of a cuboid structure, and the fixing portion 21 is fixedly connected to the mounting portion 22. In this embodiment, the fixing portion 21 and the mounting portion 22 are designed as an integral structure. The side wall of the fixing portion 21 is in clearance fit with the side wall of the chute 11 to realize the sliding of the fixing portion 21 in the chute 11, and the adjustment of the lens bracket 2 in the circumferential direction of the coupling cylinder 1 can be realized through the clearance.

[0039] Further, the clamping member 3 presses against one end of the fixing portion 21 passing through the sliding groove 11 to fix the lens holder 2. Specifically, the fixing portion 21 passes through the sliding groove 11 to the outside of the coupling cylinder 1, and the clamping member 3 sleeved outside the coupling cylinder 1 presses against the position of the fixing portion 21 outside the coupling cylinder 1.

[0040] Optionally, both end faces of the fixing portion 21 are planar to form a surface contact with the clamping member 3, increasing the contact area between the clamping member 3 and the fixing portion 21 to make the fixing of the clamping member 3 to the fixing portion 21 more firm.

[0041] Optionally, there is a clearance fit between the mounting portion 22 and the coupling cylinder 1 so that while the lens holder 2 is slidably connected to the coupling cylinder 1, the position of the lens holder 2 along the radial direction of the coupling cylinder 1 can be adjusted. Specifically, the outer diameter of the mounting portion 22 is smaller than the inner diameter of the coupling cylinder 1, and the difference between the outer diameter of the mounting portion 22 and the inner diameter of the coupling cylinder 1 is in the range of 0.2 - 2 millimeters.

[0042] Optionally, the coupling cylinder 1 is provided with an external thread, and the clamping member 3 is threadedly connected to the coupling cylinder 1 so that the position of the clamping member 3 on the coupling cylinder 1 can be adjusted.

[0043] Specifically, an external thread is axially provided on the outer wall of the coupling cylinder 1, and the clamping member 3 is provided with an internal thread matching the external thread. By rotating the clamping member 3 in different directions, the position of the clamping member 3 on the coupling cylinder 1 can be flexibly adjusted. It should be understood that the clamping member 3 can also form a position - adjustable connection with the coupling cylinder 1 through a clamping structure, etc. For example, a plurality of pin holes are spaced on the coupling cylinder 1, and the clamping member 3 has a pin that can be inserted into the pin holes, etc., which can also achieve the position adjustability between the clamping member 3 and the coupling cylinder 1. The specific connection method between the clamping member 3 and the coupling cylinder 1 can be designed according to the actual position adjustment requirements.

[0044] Further, the clamping member 3 includes a first clamping ring 31 and a second clamping ring 32. The first clamping ring 31 and the second clamping ring 32 are installed on both sides of the lens holder 2 to press against the lens holder 2 to fix the lens holder 2.

[0045] Specifically, the first clamping ring 31 and the second clamping ring 32 are circular rings, and both the first clamping ring 31 and the second clamping ring 32 are provided with internal threads and are threadedly connected to the coupling cylinder 1. During installation, first step, thread the first clamping ring 31 onto the outside of the coupling cylinder 1; second step, slidably connect the fixing portion 21 of the lens holder 2 to the sliding groove 11 so that one side of the fixing portion 21 abuts against the first clamping ring 31; third step, thread the second clamping ring 32 onto the outside of the coupling cylinder 1 so that the second clamping ring 32 abuts against the other side of the fixing portion 21 to form a double - side pressing and fixing of the lens holder 2.

[0046] In other embodiments, the clamping member 3 is connected to the lens holder 2 through a connecting member to press against the lens holder 2. Specifically, a threaded hole is provided on the clamping member 3, and a screw hole is provided at the part where the fixing portion 21 passes through the sliding groove 11. A screw is used as the connecting member, which passes through the screw hole and is threadedly connected to the threaded hole to form a one-sided pressing and fixing of the lens holder 2 and the clamping member 3.

[0047] Optionally, the laser coupling device further includes an optical fiber. One end of the optical fiber is installed in the coupling cylinder 1, and the other end of the optical fiber is used to connect to a pump source to transmit light; and / or, the lens 4 includes a first lens, a second lens, and a third lens. The first lens, the second lens, and the third lens are sequentially installed in the coupling cylinder 1 along the axial direction. By adjusting the axial positions of the first lens, the second lens, and the third lens, a better coupling effect can be achieved.

[0048] Specifically, an optical fiber connector 12 is provided at one end of the coupling cylinder 1 along the axial direction, and one end of the optical fiber is connected to the coupling cylinder 1 through the optical fiber connector 12. The first lens is installed on the first lens holder, the second lens is installed on the second lens holder, and the third lens is installed on the third lens holder. The first lens holder is fixed in the coupling cylinder 1 through the first clamping member, the second lens holder is fixed in the coupling cylinder 1 through the second clamping member, and the third lens holder is fixed in the coupling cylinder 1 through the third clamping member.

[0049] This embodiment also provides a laser, which includes a pump source, a laser crystal, and the above-mentioned laser coupling device. The pump source is installed at one end of the coupling cylinder 1, and the laser crystal is arranged at the end of the laser coupling device away from the pump source so that the light emitted by the pump source can be injected into the laser crystal through the laser coupling device.

[0050] Specifically, an external thread is provided on the outside of the optical fiber connector 12, and the pump source is threadedly connected to the optical fiber connector 12 to fix the pump source. The laser crystal is arranged on an external object. By adjusting the position of the lens 4 on the coupling cylinder 1, the size of the light spot injected into the laser crystal is adjusted to achieve the best coupling effect.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A laser coupling device, characterized in that, Comprising: Coupling cylinder (1); Lens holder (2), the lens holder (2) is connected to the coupling cylinder (1) in an axially adjustable manner along the coupling cylinder (1), and a part of the lens holder (2) is located inside the coupling cylinder (1), and a part extends outside the coupling cylinder (1); Clamping member (3), the clamping member (3) is sleeved on the outside of the coupling cylinder (1) in a position-adjustable manner, and abuts against the part of the lens holder (2) extending outside the coupling cylinder (1) to fix the lens holder (2) to the coupling cylinder (1); Lens (4), the lens (4) is arranged on the lens holder (2) and is located inside the coupling cylinder (1).

2. The laser coupling device according to claim 1, wherein The coupling cylinder (1) is provided with an axially extending sliding groove (11), and a part of the lens holder (2) passes through the sliding groove (11) and is slidably connected to the sliding groove (11).

3. The laser coupling device according to claim 2, wherein The lens holder (2) includes a mounting portion (22) and a fixing portion (21), the mounting portion (22) is arranged inside the coupling cylinder (1), the lens (4) is mounted on the mounting portion (22), one end of the fixing portion (21) is connected to the mounting portion (22), and the other end of the fixing portion (21) passes through the sliding groove (11) and extends outside the coupling cylinder (1).

4. The laser coupling device according to claim 3, characterized in that The clamping member (3) abuts against one end of the fixing portion (21) passing through the sliding groove (11).

5. The laser coupling device according to claim 4, characterized in that, Both end faces of the fixing portion (21) are planar to form a surface contact with the clamping member (3).

6. The laser coupling device according to claim 3, characterized in that, A clearance fit is provided between the mounting portion (22) and the coupling cylinder (1) to adjust the position of the lens holder (2) in the radial direction of the coupling cylinder (1).

7. The laser coupling device according to any one of claims 1 to 6, characterized in that, The coupling cylinder (1) is provided with an external thread, and the clamping member (3) is threadedly connected to the coupling cylinder (1).

8. The laser coupling device according to claim 7, wherein The clamping member (3) includes a first clamping ring (31) and a second clamping ring (32), and the first clamping ring (31) and the second clamping ring (32) are mounted on both sides of the lens holder (2) to abut against the lens holder (2).

9. The laser coupling device according to claim 1, wherein, The laser coupling device further includes an optical fiber, one end of the optical fiber is mounted on the coupling cylinder (1), and the other end of the optical fiber is used to connect to a pump source; and / or, The lens (4) includes a first lens, a second lens and a third lens, and the first lens, the second lens and the third lens are sequentially mounted inside the coupling cylinder (1) along the axis.

10. A laser, characterized in that, Comprising a pump source, a laser crystal and the laser coupling device according to any one of claims 1-9, the pump source is mounted at one end of the coupling cylinder (1), and the laser crystal is arranged at the end of the laser coupling device away from the pump source.

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