Laser device and laser treatment instrument

Abstract

The utility model discloses a kind of laser device and laser therapeutic instrument, including first laser, second laser, beam synthesis subassembly and optical fiber;The first laser is used for emitting holmium laser towards the beam synthesis subassembly;The second laser is used for emitting thulium laser towards the beam synthesis subassembly;The beam synthesis subassembly is used to beam combining the holmium laser emitted by the first laser and the thulium laser emitted by the second laser into mixed light beam, and the mixed light beam is output to the optical fiber.Wherein, laser device can generate the mixed light beam of holmium laser and thulium laser when working to beam combining, and mixed light beam is guided to target position (such as the region needing treatment) by optical fiber, so that corresponding treatment can be carried out using mixed light beam, so that the treatment effect of holmium laser and thulium laser can be considered.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a laser device and a laser therapy instrument. Background Technology

[0002] Currently, urology has become the most active and rapidly developing field in the application of laser medical technology. Taking urinary tract stones and benign prostatic hyperplasia as examples, these two types of diseases are mainly treated with holmium lasers and thulium lasers (primarily ultrapulse thulium lasers). However, in practical use, both holmium laser treatment and thulium laser treatment have their own shortcomings.

[0003] Holmium laser excitation generates plasma bubbles on the surface of the stone, triggering a high-intensity shock wave that causes the stone to fragment, creating a photomechanical explosion effect. In lithotripsy, holmium lasers are effective at breaking down large and hard stones into fragments of varying sizes, but they are less effective at pulverizing stones into uniform small particles. In prostate enucleation, holmium lasers do not require prying to open the surgical surface; instead, they open the prostate capsule through an explosive action, avoiding traction, compression, and damage to the external urethral sphincter. This advantage is widely accepted by surgeons. However, its hemostasis is relatively poor, often requiring the use of a plasma electrosurgical unit or a thulium laser during the procedure.

[0004] Thulium lasers primarily work by heating the surface moisture of stones to generate micro-vapor bubbles, softening the stone's surface structure and achieving thermal ablation. Simultaneously, the expansion and rupture of these vapor bubbles generate tiny shock waves that further fragment the stone. Therefore, ultrapulse thulium lasers can vaporize stones layer by layer, producing finer fragments (less than 1 mm), reducing the risk of residual stones after surgery. However, they are less effective at breaking down large and hard stones, resulting in low fragmentation efficiency. In prostate enucleation surgery, ultrapulse thulium lasers offer strong vaporization and cutting capabilities and good hemostasis, but require prying and dissecting to open the surgical plane, which may cause traction, compression, and damage to the external urethral sphincter. Utility Model Content

[0005] This utility model provides a laser device and laser therapy instrument, which aims to combine the advantages of holmium laser and ultrapulse thulium laser to make up for their shortcomings in lithotripsy and prostate enucleation surgery.

[0006] This utility model provides a laser device, including a first laser, a second laser, a beam combining component, and an optical fiber; the first laser is used to emit holmium laser towards the beam combining component; the second laser is used to emit thulium laser towards the beam combining component; the beam combining component is used to combine the holmium laser emitted by the first laser and the thulium laser emitted by the second laser into a mixed beam, and output the mixed beam to the optical fiber.

[0007] Optionally, the beam combining assembly includes a first collimator, a second collimator, and a dichroic mirror; in the propagation path of the holmium laser, the first laser, the first collimator, and the dichroic mirror are arranged in sequence; in the propagation path of the thulium laser, the second laser, the second collimator, and the dichroic mirror are arranged in sequence; the first collimator is used to collimate the holmium laser emitted by the first laser, and the second collimator is used to collimate the thulium laser emitted by the second laser; the dichroic mirror is used to combine the holmium laser collimated by the first collimator and the thulium laser collimated by the second collimator into the mixed beam.

[0008] Optionally, the dichroic mirror has an incident surface and a reflecting surface arranged opposite to each other; the holmium laser collimated by the first collimator is transmitted to the reflecting surface of the dichroic mirror; the thulium laser collimated by the second collimator is transmitted to the incident surface of the dichroic mirror and exits from the reflecting surface of the dichroic mirror; the beam combining assembly further includes a first reflecting mirror; in the propagation path of the thulium laser, the first reflecting mirror is located between the second collimator and the dichroic mirror, for reflecting the holmium laser collimated by the second collimator to the incident surface of the dichroic mirror.

[0009] Optionally, the collimation path of the first collimator is parallel to the collimation path of the second collimator, such that the holmium laser collimated by the first collimator and the thulium laser collimated by the second collimator are parallel; the incident surface of the dichroic mirror and the reflecting surface of the dichroic mirror are parallel; the angle between the collimation path of the first collimator and the reflecting surface of the dichroic mirror is an acute angle, and the angle between the collimation path of the second collimator and the reflecting surface of the first mirror is an acute angle.

[0010] Optionally, the beam combining assembly further includes a first shaping module located between the dichroic mirror and the optical fiber, so that the mixed beam is adjusted by the first shaping module and then transmitted to the optical fiber.

[0011] Optionally, the laser device further includes a cooling component connected to the dichroic mirror for cooling the dichroic mirror.

[0012] Optionally, the beam combining assembly includes a third collimator, a fourth collimator, and a reflection grating; in the propagation path of the holmium laser, the first laser, the third collimator, and the reflection grating are arranged sequentially; in the propagation path of the thulium laser, the second laser, the fourth collimator, and the reflection grating are arranged sequentially; the third collimator is used to collimate the holmium laser emitted by the first laser, and the fourth collimator is used to collimate the thulium laser emitted by the second laser; the reflection grating is used to combine the holmium laser collimated by the third collimator and the thulium laser collimated by the fourth collimator into the mixed beam; the beam combining assembly further includes a second shaping module, which is located between the reflection grating and the optical fiber, so that the mixed beam is adjusted by the second shaping module and then transmitted to the optical fiber.

[0013] Optionally, the beam combining assembly includes a first polarizer, a second polarizer, a half-wave plate, a second mirror, a polarization combiner, and a third shaping module; in the propagation path of the holmium laser, the first laser, the first polarizer, and the polarization combiner are arranged sequentially; in the propagation path of the thulium laser, the second laser, the second polarizer, the half-wave plate, the second mirror, and the polarization combiner are arranged sequentially; the polarization combiner is used to combine the holmium laser polarized by the first polarizer and the thulium laser reflected by the second mirror into the mixed beam; the third shaping module is located between the polarization combiner and the optical fiber, so that the mixed beam is adjusted by the third shaping module and then transmitted to the optical fiber.

[0014] Optionally, the first laser emits a holmium laser with a wavelength of 2100 nm; the second laser emits a thulium laser that is an ultrapulse thulium laser with a wavelength of 1940 nm, and the repetition frequency of the thulium laser is greater than or equal to 1 Hz and less than or equal to 2000 Hz.

[0015] This utility model embodiment also provides a laser therapy device, including any of the laser devices described above.

[0016] In the laser device and laser therapy instrument provided in this embodiment of the invention, when the laser device is working, it can generate a mixed beam of holmium laser and thulium laser, which is then combined and guided to the target location (such as the area to be treated) through an optical fiber. This allows for treatment using the mixed beam, thus combining the therapeutic effects of both holmium and thulium lasers. Specifically, in lithotripsy, the holmium laser can be used to break large and hard stones into fragments, improving fragmentation efficiency. Simultaneously, the ultrapulse thulium laser softens and ablates the stones, further increasing fragmentation efficiency and reducing the risk of residual stones post-surgery. In prostate enucleation surgery, the holmium laser can be used to open the prostate capsule, avoiding traction, compression, and damage to the external urethral sphincter. Simultaneously, the ultrapulse thulium laser improves hemostasis, increasing surgical efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the optical path of the laser device provided in Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the optical path of the laser device provided in Embodiment 2 of this utility model;

[0020] Figure 3 This is a schematic diagram of the optical path of the laser device provided in Embodiment 3 of this utility model.

[0021] Instruction manual drawing reference numerals:

[0022] 10. Laser device;

[0023] 1. First laser;

[0024] 2. Second laser;

[0025] 3. Beam combining assembly; 31. First collimator; 32. Second collimator; 33. Dichroic mirror; 331. First incident surface; 332. First reflecting surface; 34. First reflecting mirror; 341. Second reflecting surface; 35. First shaping module; 36. Third collimator; 37. Fourth collimator; 38. Reflection grating; 39. Second shaping module; 40. First polarizer; 41. Second polarizer; 42. Half-wave plate; 43. Second reflecting mirror; 44. Polarization combiner; 45. Third shaping module;

[0026] 4. Optical fiber. Detailed Implementation

[0027] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Example 1

[0031] like Figure 1 As shown, in one embodiment, the laser device 10 includes a first laser 1, a second laser 2, a beam combining component 3, and an optical fiber 4; the first laser 1 is used to emit holmium laser towards the beam combining component 3; the second laser 2 is used to emit thulium laser towards the beam combining component 3; the beam combining component 3 is used to combine the holmium laser emitted by the first laser 1 and the thulium laser emitted by the second laser 2 into a mixed beam, and output the mixed beam to the optical fiber 4; the optical fiber 4 is used to guide the mixed beam to the target position.

[0032] In this embodiment, when the laser device 10 is working, it can generate a mixed beam of holmium and thulium lasers, which is then combined and guided to the target location (such as the area requiring treatment) via optical fiber 4. This allows for treatment using the mixed beam, combining the therapeutic effects of both holmium and thulium lasers. In lithotripsy, holmium lasers can be used to break large and hard stones into fragments, improving fragmentation efficiency. Simultaneously, ultrapulse thulium lasers are used to soften and ablate the stones, further increasing fragmentation efficiency and reducing the risk of residual stones post-surgery. In prostate enucleation surgery, holmium lasers can be used to open the prostate capsule, avoiding traction, compression, and damage to the external urethral sphincter, while thulium lasers enhance hemostasis.

[0033] In this scheme, when the mixed beam just exits the beam combining component 3, in the orthogonal projection on the plane perpendicular to the beam, the projection of the holmium laser can be completely located within the projection of the thulium laser; or, in this scheme, a portion of the thulium laser projection is located within the projection of the holmium laser, and a portion of the thulium laser projection is not located within the projection of the holmium laser. In this case, the size of the thulium laser spot can be larger than the size of the holmium laser spot.

[0034] Of course, when the mixed beam just exits the beam combining component 3, the orthographic projection on the plane perpendicular to the beam can also be configured as follows: part of the holmium laser projection is located within the thulium laser projection, and part of the holmium laser projection is not located within the thulium laser projection; in this scheme, the thulium laser projection can be completely located within the holmium laser projection; or, part of the thulium laser projection is located within the holmium laser projection, and part of the thulium laser projection is not located within the holmium laser projection. In this case, the size of the holmium laser spot can be larger than the size of the thulium laser spot.

[0035] In one embodiment, the wavelength of the holmium laser emitted by the first laser 1 is 2100 nm; in addition, the pulse energy of the holmium laser is greater than or equal to 0.5 J and less than or equal to 5 J, the pulse width of the holmium laser is greater than or equal to 0.2 ms and less than or equal to 0.8 ms, the repetition frequency of the holmium laser is greater than or equal to 1 Hz and less than or equal to 50 Hz, the peak power of the holmium laser can be 500 W, and the beam quality of the holmium laser M² ≤ 1.2.

[0036] In one embodiment, the thulium laser emitted by the second laser 2 is an ultrapulse thulium laser, wherein the wavelength of the thulium laser is 1940 nm. The pulse energy of the thulium laser is greater than or equal to 0.025 J and less than or equal to 6 J, the pulse width is greater than or equal to 0.2 ms and less than or equal to 32 ms, the repetition frequency is greater than or equal to 1 Hz and less than or equal to 2000 Hz, the peak power of the thulium laser can be 500 W, and the beam quality M² ≤ 1.2. Preferably, the repetition frequency of the thulium laser is greater than or equal to 1 Hz and less than or equal to 200 Hz. Furthermore, the relevant parameters of the ultrapulse thulium laser can also adopt existing designs.

[0037] It should be noted that the first laser 1 can be an existing holmium laser, the second laser 2 can be an existing ultrapulse thulium laser, and the fiber 4 can also be an existing design.

[0038] like Figure 1 As shown, in one embodiment, the beam combining assembly 3 includes a first collimator 31, a second collimator 32, and a dichroic mirror 33; in the propagation path of the holmium laser, the first laser 1, the first collimator 31, and the dichroic mirror 33 are arranged sequentially; in the propagation path of the thulium laser, the second laser 2, the second collimator 32, and the dichroic mirror 33 are arranged sequentially; the first collimator 31 is used to collimate the holmium laser emitted by the first laser 1, and the second collimator 32 is used to collimate the thulium laser emitted by the second laser 2; the dichroic mirror 33 is used to combine the holmium laser collimated by the first collimator 31 and the thulium laser collimated by the second collimator 32 into a mixed beam.

[0039] The collimation effect of the first collimator 31 reduces light diffusion, allowing as much of the holmium laser emitted by the first laser 1 as possible to reach the dichroic mirror 33, thus minimizing energy waste. Similarly, the collimation effect of the second collimator 32 allows as much of the thulium laser emitted by the second laser 2 as possible to reach the dichroic mirror 33, further reducing energy waste. Furthermore, the collimation effects of the first and second collimators 31 and 32 also improve the beam combining effect of the dichroic mirror 33 on the holmium and thulium lasers.

[0040] Among them, "the propagation path of holmium laser" refers to the path that the holmium laser emitted by the first laser 1 travels from the first laser 1 to the optical fiber 4.

[0041] "The propagation path of the thulium laser" refers to the path that the holmium laser emitted by the second laser 2 takes as it travels from the second laser 2 to the optical fiber 4.

[0042] "In the propagation path of the holmium laser, the first laser 1, the first collimator 31, and the dichroic mirror 33 are arranged in sequence" means that the holmium laser emitted by the first laser 1 first passes through the first collimator 31, then is transmitted to the dichroic mirror 33, and then to the optical fiber 4.

[0043] "In the propagation path of the thulium laser, the second laser 2, the second collimator 32, and the dichroic mirror 33 are arranged in sequence" means that the thulium laser emitted by the second laser 2 first passes through the second collimator 32, then is transmitted to the dichroic mirror 33, and then to the optical fiber 4.

[0044] It should be noted that both the first collimator 31 and the second collimator 32 can be existing collimators.

[0045] like Figure 1 As shown, in one embodiment, the dichroic mirror 33 has an incident surface and a reflecting surface arranged opposite to each other, wherein, in Figure 1 In this system, the incident surface of the dichroic mirror 33 is the first incident surface 331, and the reflecting surface of the dichroic mirror 33 is the first reflecting surface 332. The holmium laser collimated by the first collimator 31 is transmitted to the reflecting surface of the dichroic mirror 33; the thulium laser collimated by the second collimator 32 is transmitted to the incident surface of the dichroic mirror 33 and exits from the reflecting surface of the dichroic mirror 33.

[0046] In other embodiments, the following configuration may be adopted: the holmium laser collimated by the first collimator 31 is transmitted to the first incident surface 331 and emitted from the first reflecting surface 332; the thulium laser collimated by the second collimator 32 is transmitted to the first reflecting surface.

[0047] It should be understood that the dichroic mirror 33 may be an existing design, and its operation to achieve the combination of two beams of light is also existing technology.

[0048] like Figure 1 As shown, in one embodiment, the beam combining assembly 3 further includes a first reflecting mirror 34; in the propagation path of the thulium laser, the first reflecting mirror 34 is located between the second collimator 32 and the dichroic mirror 33, and is used to reflect the holmium laser collimated by the second collimator 32 to the incident surface of the dichroic mirror 33.

[0049] The propagation path of light can be changed by setting the first reflector 34, so that the second laser 2 and the second collimator 32 can be installed in a suitable position according to the actual environment.

[0050] The first reflecting mirror 34 can be a plane reflecting mirror, etc. Figure 1 In the example shown, the number of first reflectors 34 is one.

[0051] In other embodiments, there may be multiple first reflectors 34. When there are multiple first reflectors 34, after the thulium laser is emitted from the second collimator 32, it is reflected by each of the first reflectors 34 in sequence and then transmitted to the dichroic mirror 33.

[0052] like Figure 1 As shown, in one embodiment, the collimation path of the first collimator 31 is parallel to the collimation path of the second collimator 32, such that the holmium laser collimated by the first collimator 31 and the thulium laser collimated by the second collimator 32 are parallel; the incident surface of the dichroic mirror 33 and the reflecting surface of the dichroic mirror 33 are parallel; the angle between the collimation path of the first collimator 31 and the reflecting surface of the dichroic mirror 33 is an acute angle, and the angle between the collimation path of the second collimator 32 and the reflecting surface of the first mirror 34 is an acute angle.

[0053] The "collimation path of the first collimator 31" can refer to the propagation path of light after it has been collimated by the first collimator 31 and its propagation path has not been changed by other objects. In the embodiment shown in 1, the propagation path of the holmium laser after it is emitted from the first collimator 31 until it is transmitted to the dichroic mirror 33 is the collimation path of the first collimator 31.

[0054] "The collimation path of the second collimator 32" can refer to the propagation path of light after it has been collimated by the second collimator 32 and its propagation path has not been changed by other objects. In the embodiment shown in 1, the propagation path of the thulium laser after it is emitted from the second collimator 32 until it is transmitted to the first reflector 34 is the collimation path of the first collimator 31.

[0055] Furthermore, the reflecting surface of the first reflecting mirror 34 can be parallel or non-parallel to the first incident surface 331. Specifically, in... Figure 1 The reflecting surface of the first reflecting mirror 34 is the second reflecting surface 341. In addition, the first incident surface 331, the first reflecting surface 332, and the second reflecting surface 341 can all be planes.

[0056] In one embodiment, the collimation path collimated by the first collimator 31 forms an angle of 45° with the first reflecting surface 332, and the collimation path collimated by the second collimator 32 forms an angle of 45° with the second reflecting surface 341.

[0057] like Figure 1 As shown, in one embodiment, the beam combining component 3 further includes a first shaping module 35, which is located between the dichroic mirror 33 and the optical fiber 4, so that the mixed beam is transmitted to the optical fiber 4 after being adjusted by the first shaping module 35, thereby improving the beam quality of the mixed beam.

[0058] The first shaping module 35 can be used to collimate the mixed beam and improve its energy density. In this case, the first shaping module 35 may include a focusing lens and a collimating lens. The focusing lens is used to improve the energy density of the mixed beam, and the collimating lens is used to collimate the mixed beam. Furthermore, the collimating lens is located between the focusing lens and the optical fiber 4. The mixed beam first passes through the focusing lens and then to the collimating lens. After passing through the collimator, the mixed beam can then be transmitted to the optical fiber 4. Both the focusing lens and the collimating lens can employ existing designs.

[0059] Furthermore, in actual products, the optical elements of the first shaping module 35 can be adapted to different needs, and these optical elements can also adopt existing designs.

[0060] In one embodiment, the laser device 10 further includes a cooling component connected to the dichroic mirror 33 for cooling the dichroic mirror 33. This controls the temperature rise of the dichroic mirror 33, prevents thermal deformation of the coating of the dichroic mirror 33 from causing spectral shift, and improves the beam combining effect of the dichroic mirror 33.

[0061] In one embodiment, the cooling component can be an air blowing component, which blows air onto the dichroic mirror 33 to cool it. The air blowing component may include an air source and an air pipe, etc. The air pipe can guide the gas from the air source to a suitable position on the dichroic mirror 33 for air blowing. The air source can be a fan or the like. Alternatively, a fan or the like can be used to blow air onto the dichroic mirror 33 directly.

[0062] In other embodiments, the cooling assembly can also be a liquid cooling assembly, which includes a supporting substrate with flow channels within it, allowing coolant to flow through. A dichroic mirror 33 is mounted on the substrate to absorb heat from the dichroic mirror 33. The substrate may have a slot or hole, in which the dichroic mirror 33 is mounted, and after assembly, the substrate does not adversely interfere with the light beam combining function of the dichroic mirror 33. For example, the substrate may have a through-hole, with the dichroic mirror 33 embedded within it. The incident surface and reflecting surface of the dichroic mirror 33 are opposite surfaces of the dichroic mirror 33 along the axial direction of the through-hole.

[0063] Of course, in other implementations, a cooling component may not be required.

[0064] Example 2

[0065] The difference between Example 2 and Example 1 is that the beam combining component 3 in Example 2 is different from the beam combining component 3 in Example 1.

[0066] likeFigure 2 As shown, in Embodiment 2, the beam combining assembly 3 includes a third collimator 36, a fourth collimator 37, and a reflective grating 38. In the propagation path of the holmium laser, the first laser 1, the third collimator 36, and the reflective grating 38 are arranged sequentially. In the propagation path of the thulium laser, the second laser 2, the fourth collimator 37, and the reflective grating 38 are arranged sequentially. The third collimator 36 is used to collimate the holmium laser emitted by the first laser 1, and the fourth collimator 37 is used to collimate the thulium laser emitted by the second laser 2. The reflective grating 38 is used to combine the holmium laser collimated by the third collimator 36 and the thulium laser collimated by the fourth collimator 37 into a mixed beam.

[0067] In other words, this embodiment is equivalent to replacing the dichroic mirror 33 in embodiment one with a reflective grating 38. Furthermore, the reflective grating 38 is prior art, and its operation for combining two beams of light is also prior art.

[0068] In addition, the third collimator 36 and the fourth collimator 37 can both be the same as the first collimator 31.

[0069] In practical use, the spacing between the third collimator 36 and the fourth collimator 37, as well as their collimation paths, can be adjusted so that the holmium laser and the thulium laser can be combined after being reflected by the reflection grating 38.

[0070] like Figure 2 As shown, in Embodiment 2, the beam combining assembly 3 further includes a second shaping module 39, which is located between the reflection grating 38 and the optical fiber 4, so that the mixed beam is transmitted to the optical fiber 4 after being adjusted by the second shaping module 39. This can improve the beam quality of the mixed beam.

[0071] The second shaping module 39 can be used to collimate the mixed beam and improve the energy density of the mixed beam. In this case, the structure of the second shaping module 39 can be the same as that of the first shaping module 35.

[0072] Apart from the differences mentioned above, all other settings in Embodiment 2 can be the same as in Embodiment 1.

[0073] Example 3

[0074] The difference between Example 3 and Example 1 is that the beam combining component 3 in Example 3 is different from the beam combining component 3 in Example 1.

[0075] like Figure 3As shown, in Embodiment 3, the beam combining component 3 includes a first polarizer 40, a second polarizer 41, a half-wave plate 42, a second reflector 43, a polarization combiner 44, and a third shaping module 45. In the propagation path of the holmium laser, the first laser 1, the first polarizer 40, and the polarization combiner 44 are arranged sequentially. In the propagation path of the thulium laser, the second laser 2, the second polarizer 41, the half-wave plate 42, the second reflector 43, and the polarization combiner 44 are arranged sequentially. The polarization combiner 44 is used to combine the holmium laser polarized by the first polarizer 40 and the thulium laser reflected by the second reflector 43 into a mixed beam. The third shaping module 45 is located between the polarization combiner 44 and the optical fiber 4, so that the mixed beam is adjusted by the third shaping module 45 and then transmitted to the optical fiber 4.

[0076] The polarization direction of the holmium laser emitted by the first laser 1 after being processed by the first polarizer 40 is defined as the first polarization direction, and the polarization direction of the thulium laser emitted by the second laser 2 after being processed by the second polarizer 41 and the half-wave plate 42 is defined as the second polarization direction, wherein the first polarization direction is perpendicular to the second polarization direction.

[0077] Furthermore, the direction of light propagation can be adjusted by the second reflector 43, thus facilitating the arrangement of related components. The second reflector 43 can be a plane reflector, and can be an existing design.

[0078] Furthermore, the beam quality of the mixed beam can be improved by setting the third shaping module 45. The third shaping module 45 can be used to collimate the mixed beam and increase its energy density. In this case, the structure of the third shaping module 45 can be the same as that of the first shaping module 35.

[0079] It should be understood that the first polarizer 40 and the second polarizer 41 can both be existing polarizers such as wire grid polarizers, and the half-wave plate 42 and the polarization combiner 44 can both adopt existing designs. At the same time, the operation of combining two beams of light through these components is also existing technology, and this embodiment will not be described in detail here.

[0080] Apart from the differences mentioned above, all other settings in Embodiment 3 can be the same as in Embodiment 1.

[0081] This utility model embodiment also provides a laser therapy device, which includes the laser device 10 described in any of the above embodiments.

[0082] In one embodiment, the mixed light can be directly transmitted to the patient's treatment area via optical fiber 4, or the mixed light can be first transmitted via optical fiber 4 to a corresponding device connected to optical fiber 4 (such as an optical fiber pen), and then transmitted from that device to the patient's treatment area.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A laser device, characterized in that, It includes a first laser, a second laser, a beam combining assembly, and optical fibers; The first laser is used to emit holmium laser light toward the beam combining assembly; The second laser is used to emit thulium laser light toward the beam combining assembly; The beam combining component is used to combine the holmium laser emitted by the first laser and the thulium laser emitted by the second laser into a mixed beam, and output the mixed beam to the optical fiber.

2. The laser device according to claim 1, characterized in that, The beam combining assembly includes a first collimator, a second collimator, and a dichroic mirror; Along the propagation path of the holmium laser, the first laser, the first collimator, and the dichroic mirror are arranged in sequence. Along the propagation path of the thulium laser, the second laser, the second collimator, and the dichroic mirror are arranged in sequence. The first collimator is used to collimate the holmium laser emitted by the first laser, and the second collimator is used to collimate the thulium laser emitted by the second laser. The dichroic mirror is used to combine the holmium laser collimated by the first collimator and the thulium laser collimated by the second collimator into the mixed beam.

3. The laser device according to claim 2, characterized in that, The dichroic mirror has an incident surface and a reflecting surface arranged opposite to each other; The holmium laser, collimated by the first collimator, is transmitted to the reflecting surface of the dichroic mirror; The thulium laser, collimated by the second collimator, is transmitted to the incident surface of the dichroic mirror and exits from the reflecting surface of the dichroic mirror; The beam combining assembly also includes a first reflecting mirror; In the propagation path of the thulium laser, the first reflecting mirror is located between the second collimator and the dichroic mirror, and is used to reflect the holmium laser collimated by the second collimator to the incident surface of the dichroic mirror.

4. The laser device according to claim 3, characterized in that, The collimation path of the first collimator is parallel to the collimation path of the second collimator, such that the holmium laser collimated by the first collimator and the thulium laser collimated by the second collimator are parallel; The incident surface and the reflecting surface of the dichroic mirror are parallel. The collimation path of the first collimator forms an acute angle with the reflecting surface of the dichroic mirror, and the collimation path of the second collimator forms an acute angle with the reflecting surface of the first mirror.

5. The laser device according to claim 2, characterized in that, The beam combining assembly further includes a first shaping module located between the dichroic mirror and the optical fiber, so that the mixed beam is adjusted by the first shaping module and then transmitted to the optical fiber.

6. The laser device according to claim 2, characterized in that, The laser device also includes a cooling component connected to the dichroic mirror for cooling the dichroic mirror.

7. The laser device according to claim 1, characterized in that, The beam combining assembly includes a third collimator, a fourth collimator, and a reflection grating; Along the propagation path of the holmium laser, the first laser, the third collimator, and the reflective grating are arranged in sequence. Along the propagation path of the thulium laser, the second laser, the fourth collimator, and the reflective grating are arranged in sequence; The third collimator is used to collimate the holmium laser emitted by the first laser, and the fourth collimator is used to collimate the thulium laser emitted by the second laser. The reflective grating is used to combine the holmium laser collimated by the third collimator and the thulium laser collimated by the fourth collimator into the mixed beam; The beam combining assembly further includes a second shaping module located between the reflection grating and the optical fiber, so that the mixed beam is adjusted by the second shaping module and then transmitted to the optical fiber.

8. The laser device according to claim 1, characterized in that, The beam combining assembly includes a first polarizer, a second polarizer, a half-wave plate, a second mirror, a polarization combiner, and a third shaping module; Along the propagation path of the holmium laser, the first laser, the first polarizer, and the polarization combiner are arranged in sequence. Along the propagation path of the thulium laser, the second laser, the second polarizer, the half-wave plate, the second mirror, and the polarization synthesizer are arranged in sequence. The polarization combiner is used to combine the holmium laser polarized by the first polarizer and the thulium laser reflected by the second mirror into the mixed beam; The third shaping module is located between the polarization synthesizer and the optical fiber so that the mixed beam is adjusted by the third shaping module and then transmitted to the optical fiber.

9. The laser device according to any one of claims 1 to 8, characterized in that, The wavelength of the holmium laser emitted by the first laser is 2100 nm; The thulium laser emitted by the second laser is an ultrapulse thulium laser with a wavelength of 1940 nm and a repetition frequency of greater than or equal to 1 Hz and less than or equal to 2000 Hz.

10. A laser therapy device, characterized in that, Includes the laser device according to any one of claims 1 to 9.

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