Laser output head and laser

Abstract

The utility model provides a laser output head and a laser, which relates to the technical field of laser equipment. The laser output head includes an output optical fiber, a quartz column, at least three film strippers and a reflector. The output optical fiber includes a stripping port, an output end and an input end; the quartz column is arranged at the output end; from the input end to the output end, at least three film strippers are arranged at intervals on the output optical fiber; the reflector is sleeved on the output optical fiber, the reflector is arranged between two adjacent film strippers, and the reflector is located on the side of the stripping port close to the output end, so that at least two film strippers are located on the side of the stripping port away from the output end. The output end of the output optical fiber of the utility model outputs a laser beam through the quartz column, and the reflector is used to reflect the cladding light and the return light toward the direction of the output end, so as to reduce the laser that can enter the laser and reduce the return light at the stripping port position, so as to achieve a balance between preventing the output optical fiber from breaking and reducing the laser return.

Description

Technical Field

[0001] The utility model relates to the technical field of laser equipment, in particular to a laser output head and a laser. Background Art

[0002] Laser output heads can be used in metal material processing. Due to the low resistivity and smooth surface of metal materials, materials with high reflectivity such as copper or aluminum have low laser absorption efficiency, causing the laser to be reflected back into the laser output head, which can easily cause damage to the laser and reduce the service life of the laser, thus affecting the normal use of the laser. Utility Model Content

[0003] The utility model aims to provide a laser output head and a laser, which can reduce the return light at the stripping position. The film stripper can strip most of the cladding light and the return light, thereby increasing the service life of the laser output head.

[0004] The first aspect of the utility model provides a laser output head, which comprises an output optical fiber, a quartz column, at least three film strippers and a reflective component.

[0005] An output optical fiber, the output optical fiber comprising a stripped end, an output end and an input end, the stripped end being arranged between the output end and the input end;

[0006] A quartz column, wherein the quartz column is arranged at the output end;

[0007] At least three film strippers, from the input end to the output end, at least three film strippers are arranged on the output optical fiber at intervals;

[0008] A reflector is sleeved on the output optical fiber, and the reflector is arranged between two adjacent strippers, and the reflector is located on the side of the stripping opening close to the output end, so that at least two strippers are located on the side of the stripping opening away from the output end.

[0009] In a possible embodiment of the present invention, the reflector is arranged at an angle to the output optical fiber.

[0010] In a possible embodiment of the present invention, the reflector and the output optical fiber are perpendicular to each other.

[0011] In a possible embodiment of the present invention, the reflective element is a reflective lens.

[0012] In a possible embodiment of the present invention, a reflective film layer is coated on the surface of the reflective lens.

[0013] In a possible embodiment of the present invention, the diameter of the output optical fiber gradually increases from the input end to the output end.

[0014] In a possible embodiment of the present invention, the output optical fiber includes a core, a cladding and a coating layer, the cladding is wrapped around the core, the coating layer is wrapped around a side of the cladding away from the core, and the stripping position includes the core and the cladding.

[0015] In a possible embodiment of the present invention, the output optical fiber is one of a single-clad optical fiber, a double-clad optical fiber and a multi-clad optical fiber.

[0016] In a possible embodiment of the present invention, the laser output head further includes a housing, and the quartz column, the film stripper and the reflector are all installed in the housing.

[0017] A second aspect of the utility model provides a laser, comprising the laser output head described in any one of the above embodiments.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a laser output head and a laser, the output end of the output optical fiber outputs a laser beam through a quartz column, when the laser is reflected back into the laser output head, the stripper can strip off part of the cladding light and the return light in the optical fiber cladding, and the laser returned to the laser output head is scattered and diverged to the reflector, and the reflector is used to reflect the cladding light and the return light again toward the output end of the output optical fiber, playing a protective role to reduce the laser that can enter the laser, the reflector can protect the stripping position and reduce the return light at the stripping position, at least two strippers can strip off most of the cladding light and the return light, reduce the situation where the local temperature is too high due to the optical path aggregation, and achieve a balance between preventing the output optical fiber from breaking and reducing the laser return, thereby improving the service life of the laser output head. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The structure of the laser output head provided in some embodiments of the present invention is shown in FIG. Figure 1 ;

[0021] Figure 2A schematic diagram of the structure of an output optical fiber of a laser output head provided in some embodiments of the present utility model;

[0022] Figure 3 The structure of the laser output head provided in some embodiments of the present invention is shown in FIG. Figure 2 .

[0023] Description of main component symbols;

[0024] 100-laser output head; 110-output optical fiber; 111-output end; 112-input end; 113-stripping end; 114-fiber core; 115-cladding; 116-coating layer; 120-quartz column; 130-film stripper; 140-reflector; 150-housing. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0032] Example 1

[0033] In the related art, the laser light from the laser output device is reflected back into the laser output head 100, which may cause damage to the laser and reduce the service life of the laser, thereby affecting the normal use of the laser.

[0034] To solve the above technical problems, refer to Figure 1 As shown, an embodiment of the present application provides a laser output head 100 , which includes an output optical fiber 110 , a quartz column 120 , at least three film strippers 130 and a reflector 140 .

[0035] Specifically, Figure 1As shown, the output optical fiber 110 includes a stripping opening 113, an output end 111 and an input end 112, wherein the stripping opening 113 is arranged between the output end 111 and the input end 112; the quartz column 120 is arranged at the output end 111; from the input end 112 to the output end 111, at least three strippers 130 are arranged at intervals on the output optical fiber 110; a reflector 140 is sleeved on the output optical fiber 110, wherein the reflector 140 is arranged between two adjacent strippers 130, and the reflector 140 is located on a side of the stripping opening 113 close to the output end 111, so that at least two strippers 130 are located on a side of the stripping opening 113 away from the output end 111, and the output end 111 of the output optical fiber 110 11 outputs a laser beam through the quartz column 120. When the laser is reflected and returned to the laser output head 100, the stripper 130 can strip off part of the cladding 115 light and the return light in the optical fiber cladding 115. The laser returned to the laser output head 100 is scattered and diverged to the reflector 140. The reflector 140 is used to reflect the cladding 115 light and the return light toward the output end 111 of the output optical fiber 110 to play a protective role. The reflector 140 can protect the position of the stripping port 113 and reduce the return light at the stripping port 113. At least two strippers 130 can strip off most of the cladding 115 light and the return light, reduce the situation where the local temperature is too high due to the optical path aggregation, and achieve a balance between preventing the output optical fiber 110 from breaking and reducing the laser return.

[0036] It should be noted that the stripping port 113 is used to strip the coating layer 116 of the output optical fiber 110, which is usually made of a material having a refractive index equal to or greater than the refractive index of the optical fiber cladding 115, so as to facilitate the connection of the optical fiber line and the preparation of the optical fiber terminal during the processing. The cladding 115 light refers to the signal light that inevitably leaks in the cladding 115 structure of the output optical fiber 110 due to various factors, thereby affecting the transmission beam quality of the output optical fiber 110. The return light refers to the light beam reflected by the laser and returned to the laser output head 100.

[0037] It can be understood that the main function of the stripper is to remove the cladding light of the optical fiber so that the cladding light can be scattered from the cladding 115, which can promote the conversion of the cladding 115 mode into a radiation mode. At least two strippers 130 are set to corrode the cladding 115 of the optical fiber, ensuring that the corrosion area of ​​each stripper 130 is to avoid the local position of the cladding light from being too high in power to increase the temperature, thereby reducing the occurrence of breakage of the output optical fiber 110. The output optical fiber 110 is used as a medium, and the output optical fiber 110 can transmit the light beam, so that the light beam can be amplified, the light beam conversion efficiency is improved, and it has better light collection.

[0038] In one embodiment, specifically, the reflector 140 is disposed at an angle to the output optical fiber 110 so as to reflect and scatter the cladding light and the return light along the output optical fiber 110 toward the input end 112 .

[0039] Optionally, the reflector 140 is a reflective lens, which can change the angle of light. The reflective lens has a better reflectivity and a higher laser damage threshold, and plays a role in protecting the laser output head 100 .

[0040] In one embodiment, specifically, Figure 3 As shown, the output optical fiber 110 includes a core 114, a cladding 115 and a coating 116, the cladding 115 is wrapped around the core 114, the coating 116 is wrapped around the side of the cladding 115 away from the core 114, and the position of the stripping opening 113 includes the core 114 and the cladding 115, that is, the coating 116 is stripped off at the stripping opening 113 position to facilitate the connection of the optical fiber line.

[0041] Optionally, the output optical fiber 110 is one of a single-clad 115 optical fiber, a double-clad 115 optical fiber, and a multi-clad 115 optical fiber. It should be noted that a single-clad 115 optical fiber refers to an optical fiber having a single cladding 115, a double-clad 115 optical fiber refers to an optical fiber having two claddings 115, and a multi-clad 115 optical fiber may have multiple claddings 115 for transmitting various types of optical signals.

[0042] In summary, the output end 111 of the laser output head 100 outputs a laser beam through the quartz column 120. When the laser is reflected back into the laser output head 100, the stripper 130 can strip off part of the cladding light and the return light in the optical fiber cladding 115. The laser returned to the laser output head 100 is scattered and diverged to the reflector 140. The reflector 140 is used to reflect the cladding light and the return light again toward the output end 111 of the output optical fiber 110, playing a protective role to reduce the laser that can enter the laser. The reflector 140 can protect the position of the stripping port 113 and reduce the return light at the position of the stripping port 113. At least two strippers 130 can strip off most of the cladding light and the return light, reduce the situation where the local temperature is too high due to the optical path aggregation, and achieve a balance between preventing the output optical fiber 110 from breaking and reducing the laser return, thereby improving the service life of the laser output head 100.

[0043] Example 2

[0044] refer to Figure 1 As shown, an embodiment of the present application provides another laser output head 100 that can be applied to a laser. The laser output head 100 includes an output optical fiber 110 , a quartz column 120 , at least three film strippers 130 , and a reflector 140 .

[0045] Specifically, Figure 1 As shown, the output optical fiber 110 includes a stripped end 113, an output end 111 and an input end 112, wherein the stripped end 113 is disposed between the output end 111 and the input end 112; the quartz column 120 is disposed at the output end 111, and the output end 111 of the output optical fiber 110 outputs the laser beam through the quartz column 120. It can be understood that the quartz column 120 is used to expand the laser beam, reduce the loss of the laser beam, and adjust the output power and output range of the laser beam.

[0046] In this embodiment, at least three strippers 130 are arranged at intervals on the output optical fiber 110 from the input end 112 to the output end 111. When the laser is reflected back into the laser output head 100, the stripper 130 can strip off part of the cladding light and the return light in the optical fiber cladding 115. The laser returning to the laser output head 100 is scattered and diverged to the reflector 140.

[0047] Specifically, the reflector 140 is sleeved on the output optical fiber 110, and the reflector 140 is arranged between two adjacent strippers 130, and the reflector 140 is located on the side of the stripping opening 113 close to the output end 111, so that at least two of the strippers 130 are located on the side of the stripping opening 113 away from the output end 111. The reflector 140 is used to reflect the cladding light and the returned light toward the output end 111 of the output optical fiber 110, and plays a protective role. The reflector 140 can protect the position of the stripping opening 113 and reduce the returned light at the position of the stripping opening 113. At least two strippers 130 can strip most of the cladding light and the returned light, reduce the situation where the local temperature is too high due to the optical path aggregation, and achieve a balance between preventing the output optical fiber 110 from breaking and reducing laser return.

[0048] In one embodiment, specifically, the reflector 140 is arranged at an angle with the output optical fiber 110 so as to reflect and scatter the cladding light and the return light along the output optical fiber 110 toward the input end 112. Optionally, the reflector 140 and the output optical fiber 110 are perpendicular to each other, and the reflection of the cladding light and the return light can be further improved by the reflector 140, thereby protecting the position of the stripping port 113.

[0049] Optionally, the reflector 140 is a reflective lens, which can change the angle of light, has a better reflectivity and a higher laser damage threshold, and plays a role in protecting the laser output head 100. Furthermore, the reflective surface of the reflective lens faces the output end 111 of the output optical fiber 110, and is used to reflect the return light and cladding light of the quartz column 120.

[0050] Furthermore, the surface of the reflective lens is coated with a reflective film layer, which is used to reduce light source loss when reflecting lasers and other light sources, improve the reflectivity in a specific spectral region, and thereby improve the reflection efficiency. At the same time, the reflective film layer also has a certain anti-oxidation protection effect, thereby extending the product quality and service life of the reflective lens.

[0051] In one embodiment, specifically, referring to Figure 1 As shown, the diameter of the output optical fiber 110 gradually increases from the input end 112 to the output end 111, which facilitates the stripping of the returning light by the film stripper 130 during the transmission and reflection process of the returning light, thereby preventing the returning light from damaging the laser device.

[0052] Specifically, combined Figure 2 and Figure 3 As shown, the output optical fiber 110 includes a core 114, a cladding 115 and a coating 116, wherein the cladding 115 is wrapped around the core 114, and the coating 116 is wrapped around the side of the cladding 115 away from the core 114, and the position of the stripping opening 113 includes the core 114 and the cladding 115, that is, the coating 116 is stripped at the stripping opening 113 to facilitate the connection of the optical fiber line. Optionally, the thickness of the cladding 115 of the output optical fiber 110 remains unchanged, and the diameter of the core 114 of the output optical fiber 110 gradually increases, so that the reflector 140 can strip as much cladding 115 light and return light as possible, thereby improving the product life of the laser output head 100.

[0053] Optionally, the output optical fiber 110 is one of a single-clad optical fiber, a double-clad optical fiber and a multi-clad optical fiber. The output optical fiber 110 may also be a solid optical fiber or a hollow optical fiber, or may be a passive optical fiber or an active optical fiber.

[0054] In one embodiment, specifically, referring to Figure 2 As shown, the laser output head 100 also includes a housing 150, and the quartz column 120, the film stripper 130 and the reflector 140 are all installed in the housing 150, so that the reflector 140 is directed to the return light in the gap between the housing 150 and the output optical fiber 110, and the signal light in the gap can be reflected to reduce damage to the laser device.

[0055] In summary, the output end 111 of the laser output head 100 outputs a laser beam through the quartz column 120. When the laser is reflected back into the laser output head 100, the film stripper 130 can strip off part of the cladding light and the return light in the optical fiber cladding 115. The laser returned to the laser output head 100 is scattered and diverged to the reflector 140. The reflector 140 is used to reflect the cladding light and the return light again toward the output end 111 of the output optical fiber 110, playing a protective role to reduce the laser that can enter the laser. The reflector 140 can protect the position of the stripping port 113 and reduce the return light at the position of the stripping port 113. At least two film strippers 130 can strip off most of the cladding light and the return light. The reflector 140 is aimed at the housing 150. The signal light in the gap between the output optical fiber 110 and the output optical fiber 110 can be reflected to reduce the damage to the laser device and reduce the situation where the local temperature is too high due to the optical path aggregation, so as to achieve a balance between preventing the output optical fiber 110 from breaking and reducing the laser return, and improve the service life of the laser output head 100. The thickness of the cladding 115 of the output optical fiber 110 remains unchanged, and the diameter of the core 114 of the output optical fiber 110 gradually increases, so that the reflector 140 can strip off as much cladding light and return light as possible. The reflective film layer is used to reduce the light source loss when reflecting laser and other light sources, improve the reflectivity in a specific spectral region, and then improve the reflection efficiency. At the same time, the reflective film layer also has a certain anti-oxidation protection effect, which prolongs the product quality and service life of the reflective lens.

[0056] Example 3

[0057] The embodiment of the utility model also provides a laser, including the laser output head 100 in embodiment 1 or embodiment 2. The laser may also include other laser devices. The laser can be applied to metal cutting, welding, drilling, rust removal, etc. The laser including the laser output head 100 has all the beneficial effects of the laser output head 100, which will not be described in detail here.

[0058] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0059] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A laser output head, characterized in that: include: An output optical fiber, the output optical fiber comprising a stripped end, an output end and an input end, the stripped end being arranged between the output end and the input end; A quartz column, wherein the quartz column is arranged at the output end; At least three film strippers, from the input end to the output end, at least three film strippers are arranged on the output optical fiber at intervals; A reflector is sleeved on the output optical fiber, and the reflector is arranged between two adjacent strippers, and the reflector is located on the side of the stripping opening close to the output end, so that at least two strippers are located on the side of the stripping opening away from the output end.

2. The laser output head according to claim 1, characterized in that: The reflector is arranged at an angle to the output optical fiber.

3. The laser output head according to claim 2, characterized in that: The reflective element and the output optical fiber are perpendicular to each other.

4. The laser output head according to claim 1, characterized in that: The reflective element is a reflective lens.

5. The laser output head according to claim 4, characterized in that: The surface of the reflective lens is plated with a reflective film layer.

6. The laser output head according to any one of claims 1 to 5, characterized in that: The diameter of the output optical fiber gradually increases from the input end to the output end.

7. The laser output head according to claim 6, characterized in that: The output optical fiber comprises a core, a cladding and a coating layer, wherein the cladding is wrapped around the core, and the coating layer is wrapped around a side of the cladding away from the core, and the stripping position includes the core and the cladding.

8. The laser output head according to claim 6, characterized in that: The output optical fiber is one of a single-clad optical fiber, a double-clad optical fiber and a multi-clad optical fiber.

9. The laser output head according to any one of claims 1 to 5, characterized in that: The invention also comprises a shell, in which the quartz column, the film stripper and the reflector are all installed.

10. A laser, characterized in that: A laser output head comprising any one of claims 1 to 9.

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