Laser medical device

Abstract

The invention relates to the technical field of medical equipment, and provides a laser medical device. The laser medical device comprises a laser oscillation module, a mode selection module and an optical fiber coupling module. The laser oscillation module is used for generating laser; the mode selection module is in signal connection with the laser oscillation module and is used for adjusting the laser oscillation module, so that the laser oscillation module at least operates in a continuous operation mode, a quasi-continuous operation mode, a continuous Q-switching operation mode, a quasi-continuous same-frequency Q-switching operation mode or a quasi-continuous difference-frequency Q-switching operation mode; and the optical fiber coupling module is connected with an outlet of the laser oscillation module and is used for coupling the laser and the indication light. According to the laser medical device, the defects that in the prior art, a thulium-doped laser is relatively single in working mode, and limitation exists when multiple operation requirements are met are overcome, the laser medical device capable of achieving free switching of multiple modes is achieved, medical staff can conduct operations on multiple conditions without replacing equipment, and the working efficiency is improved. And the operation efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a laser medical device. Background Art

[0002] Lasers, with their monochromatic nature, high energy density, and controllability, have gradually become a unique medical tool. Lasers in the 2-micron wavelength range, in particular, are near the absorption peak of water. This makes laser radiation energy more easily absorbed and converted by tissue, minimizing the area of ​​damage and providing excellent blood coagulation. Therefore, they are ideally suited for high-precision, minimally invasive medical procedures in fields such as ophthalmology, dermatology, and urology.

[0003] In recent years, thulium-doped solid-state lasers have attracted attention in the field of laser medical surgery. Compared to traditional holmium-doped solid-state lasers, thulium-doped solid-state lasers offer higher average power and repetition rate, faster cutting speeds, and significantly improved surgical efficiency. Furthermore, their radiation wavelength is closer to the absorption peak of water, resulting in shallower penetration depth, which helps reduce the risk of extensive tissue bleeding and provides a certain degree of assurance for surgical safety. However, currently developed thulium-doped lasers have relatively limited operating modes, limiting their ability to meet diverse surgical needs. For example, kidney lithotripsy surgery requires the use of continuous lasers and long-pulse lasers at different stages to treat renal soft tissue and kidney stones. This necessitates switching between different devices, increasing the complexity of the procedure. Furthermore, certain highly calcified areas within the human body combine soft and hard tissue, requiring the use of a continuous laser combined with a higher-energy-density short-pulse laser to treat these areas. Therefore, a single device cannot meet all surgical requirements. Furthermore, the current adjustable range of output power, repetition frequency, and pulse width of a single thulium-doped laser is limited. For example, the same device cannot simultaneously cover laser output in the nanosecond and microsecond pulse ranges, which limits its applicability in scenarios requiring more precise cutting, thereby extending the operation time and increasing surgical risks. Summary of the Invention

[0004] The present invention provides a laser medical device to solve the problem that the thulium-doped laser in the prior art has a relatively single working mode and is limited in responding to various surgical needs. The present invention realizes a laser medical device that can freely switch between multiple modes, so that medical staff can perform surgery in response to various situations without changing equipment, greatly improving the efficiency of surgery.

[0005] The present invention provides a laser medical device, comprising:

[0006] A laser oscillation module, used for generating laser;

[0007] a mode selection module, connected to the laser oscillation module signal, for adjusting the laser oscillation module so that the laser oscillation module operates in at least a continuous operation mode, a quasi-continuous operation mode, a continuous Q-switched operation mode, a quasi-continuous same-frequency Q-switched operation mode, or a quasi-continuous difference-frequency Q-switched operation mode;

[0008] The optical fiber coupling module is connected to the outlet of the laser oscillation module and is used to couple the laser and the indicator light.

[0009] According to a laser medical device provided by the present invention, the laser oscillation module includes a semiconductor pump module and a housing, wherein a resonant cavity is provided in the housing;

[0010] A first mirror body, a thulium-doped gain crystal, an optical modulator, and a second mirror body are sequentially arranged inside the resonant cavity, and the center lines of the first mirror body, the thulium-doped gain crystal, the optical modulator, and the second mirror body are located on the same straight line;

[0011] The semiconductor pump module is arranged outside the resonant cavity and located at one end of the first mirror body. The semiconductor pump module is arranged corresponding to the end surface of the thulium-doped gain crystal.

[0012] According to a laser medical device provided by the present invention, the laser oscillation module includes a semiconductor pump module and a resonant cavity;

[0013] A first mirror body, a thulium-doped gain crystal, an optical modulator, a thulium-doped gain crystal, and a second mirror body are sequentially arranged inside the resonant cavity, and the center lines of the first mirror body, the thulium-doped gain crystal, the optical modulator, and the second mirror body are located on the same straight line;

[0014] The semiconductor pump module is arranged inside the resonant cavity and on a side of the thulium-doped gain crystal.

[0015] According to a laser medical device provided by the present invention, the surface of the first mirror body is coated with a total reflection film for the 0° angle oscillation laser wavelength, and the reflectivity R of the total reflection film is greater than 99.5%;

[0016] The surface of the second mirror body is coated with a partial reflection film for the laser wavelength incident at an angle of 0°, and the reflectivity R of the partial reflection film is ≤90%.

[0017] According to a laser medical device provided by the present invention, the laser oscillation module further includes a temperature controller, which is used to adjust the temperature of the semiconductor pump module and the thulium-doped gain crystal.

[0018] According to a laser medical device provided by the present invention, the mode selection module includes a control circuit and a Q-switched driver, the semiconductor pump module, the optical modulator and the Q-switched driver are all signal-connected to the control circuit, and the control circuit is used to control the operating states of the semiconductor pump module, the optical modulator and the Q-switched driver.

[0019] According to a laser medical device provided by the present invention, the fiber coupling module includes a fiber coupler and a light gate. The fiber coupler is used to couple the laser and the indicator light. The output end of the fiber coupler is connected to an optical fiber. The light gate is arranged at the input end of the fiber coupler or on the optical fiber.

[0020] According to a laser medical device provided by the present invention, the optical fiber is further provided with an endoscope, and the endoscope is used to observe the coupled indicator light.

[0021] According to a laser medical device provided by the present invention, the thulium-doped gain crystal includes a rod-shaped structure and a slab structure.

[0022] According to a laser medical device provided by the present invention, the resonant cavity includes a plano-planar cavity, a plano-convex cavity and an unstable cavity.

[0023] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0024] The present invention controls the laser oscillation module through the mode selection module, so that the laser oscillation module can switch between continuous operation, quasi-continuous operation, continuous Q-switched operation, quasi-continuous same-frequency Q-switched operation or quasi-continuous difference-frequency Q-switched operation mode. When used for soft tissue cutting and internal lithotripsy, the present invention can be switched to continuous operation or quasi-continuous operation; when used for cutting hard tissues such as calcification or cartilage, the present invention can be switched to continuous Q-switched operation, quasi-continuous same-frequency Q-switched operation or quasi-continuous difference-frequency Q-switched operation mode. The present invention can cope with various complex medical surgical needs such as soft tissue cutting, internal stone removal, and calcification and cartilage hard tissue resection through a single device, which not only improves surgical efficiency but also reduces surgical risks for patients. At the same time, the device has a simple structure and multiple uses, which reduces procurement and surgical costs and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is one of the structural schematic diagrams of the laser medical device provided by the present invention;

[0027] Figure 2 This is the second structural diagram of the laser medical device provided by the present invention;

[0028] Figure 3 This is a timing diagram of the laser medical device provided by the present invention in the continuous operation mode and the continuous Q-switched operation mode;

[0029] Figure 4 It is a timing diagram of the laser medical device provided by the present invention in quasi-continuous operation mode, quasi-continuous same-frequency Q-switched operation mode and quasi-continuous difference-frequency Q-switched operation mode.

[0030] Reference numerals:

[0031] 100: laser oscillator module; 110: semiconductor pump module; 120: first mirror; 130: thulium-doped gain crystal; 140: optical modulator; 150: second mirror;

[0032] 200: mode selection module; 210: control circuit; 211: first circuit; 212: second circuit; 213: third circuit; 214: fourth circuit; 220: Q-switched driver; 221: first same-frequency working state; 222: second same-frequency working state;

[0033] 300: Fiber coupling module; 310: Fiber coupler; 320: Optical shutter; 330: Fiber; 340: Endoscope; 350: Coupled light;

[0034] 410: continuous laser timing; 420: continuous Q-switched laser timing;

[0035] 510: Quasi-continuous laser timing; 520: Quasi-continuous same-frequency Q-switched laser timing; 530: Quasi-continuous difference-frequency Q-switched laser timing. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "first" and "second" are numbered for the purpose of clearly illustrating the product components and do not represent any substantial difference. The directions of "up" and "down" shall be based on the directions shown in the accompanying drawings. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances. In addition, the meaning of "multiple" is two or more. In the specification, "and / or" means at least one of the connected objects, and the character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] Figure 1 One of the structural schematic diagrams of the laser medical device provided by an embodiment of the present invention is illustrated; Figure 2 The second structural diagram of the laser medical device provided by the embodiment of the present invention is illustrated.

[0040] Reference Figure 1 or Figure 2 The laser medical device provided by an embodiment of the present invention includes a laser oscillator module 100, a mode selection module 200, and a fiber coupling module 300. The laser oscillator module 100 is used to generate laser light; the mode selection module 200 is connected to the laser oscillator module 100 for signal transmission and is used to adjust the laser oscillator module 100 so that the laser oscillator module 100 operates in at least one of continuous operation, quasi-continuous operation, continuous Q-switched operation, quasi-continuous same-frequency Q-switched operation, or quasi-continuous difference-frequency Q-switched operation mode; and the fiber coupling module 300 is connected to the outlet of the laser oscillator module 100 for coupling the laser light with the indicator light.

[0041] The present invention controls the laser oscillator module 100 through the mode selection module 200, so that the laser oscillator module 100 can switch between continuous operation, quasi-continuous operation, continuous Q-switched operation, quasi-continuous same-frequency Q-switched operation, or quasi-continuous difference-frequency Q-switched operation modes. When used for soft tissue cutting and in vivo lithotripsy, the present invention can be switched to continuous operation or quasi-continuous operation; when used for cutting hard tissue such as calcification or cartilage, the present invention can be switched to continuous Q-switched operation, quasi-continuous same-frequency Q-switched operation, or quasi-continuous difference-frequency Q-switched operation mode. This allows staff to switch functions on only one device in response to different environments, which not only improves the work efficiency of medical staff, but also significantly reduces the surgical risks of patients.

[0042] Reference Figure 1 In some embodiments of the present invention, the laser oscillation module 100 includes a semiconductor pump module 110 and a shell, in which a resonant cavity is provided; a first mirror body 120, a thulium-doped gain crystal 130, an optical modulator 140, and a second mirror body 150 are sequentially arranged inside the resonant cavity, and the center lines of the first mirror body 120, the thulium-doped gain crystal 130, the optical modulator 140, and the second mirror body 150 are located on the same straight line; the semiconductor pump module 110 is provided outside the resonant cavity and is located at one end of the first mirror body 120, and the semiconductor pump module 110 is arranged corresponding to the end surface of the thulium-doped gain crystal 130.

[0043] It is understood that the first mirror 120 serves as an input mirror, allowing the laser output from the semiconductor pump module 110 to pass through while also reflecting the laser light directed toward the thulium-doped gain crystal 130. The second mirror 150 can specifically serve as a coupling output mirror. In this embodiment, the first mirror 120 is coated with a total reflection coating for the oscillating laser wavelength at a 0° angle. This coating has a reflectivity R > 99.5% for the oscillating laser wavelength (2μm) and a reflectivity R < 3% for the incident pump laser wavelength (760nm-810nm). The second mirror 150 is coated with a partial reflection coating for the incident laser wavelength at a 0° angle. This coating has a reflectivity R ≤ 90%. The thulium-doped gain crystal 130 includes, but is not limited to, rod-shaped and slab-shaped structures.

[0044] Specifically, the central wavelength range of the semiconductor pump module 110 is 780nm-800nm. The positional relationship between the semiconductor pump module 110 and the thulium-doped gain crystal 130 requires that the laser light generated by the semiconductor pump module 110 enters vertically from the end face of the thulium-doped gain crystal 130, that is, the semiconductor pump module 110 operates in an end-face pumping mode. The reflectivity R of the first mirror body 120 is greater than 99.5%, and the reflectivity R of the second mirror body 150 is 90%. The thulium-doped gain crystal 130 is a Tm:YAG crystal (thulium-doped yttrium aluminum garnet crystal) and has a rod-shaped structure. Undoped white YAG is bonded to both ends of the crystal to reduce reabsorption loss and alleviate thermal lens effect. The optical modulator 140 is an acousto-optic modulator that periodically controls the loss in the optical resonant cavity based on the repetition frequency set by the driver. The wavelength of the thulium laser generated in the laser oscillation module 100 is 2020nm.

[0045] Specifically, the housing is an elongated structure, specifically a cylindrical structure, with an outlet at one end for facilitating the projection of the generated laser light. The other end is sealed or has an opening, with a cover at the opening. The first mirror 120, thulium-doped gain crystal 130, optical modulator 140, and second mirror 150 are spaced apart from one end of the resonant cavity to the other, that is, the second mirror 150 is positioned at one end near the outlet, while the first mirror 120 is positioned at the other end. The semiconductor pump module 110 is also positioned within the housing but outside the resonant cavity. It is understood that another cavity is also positioned within the housing, outside the resonant cavity, and the two cavities are interconnected and coaxially arranged. The laser light generated by the semiconductor pump module 110 can be emitted from the other cavity into the interior of the resonant cavity and then emitted through the resonant cavity. It should be noted that the semiconductor pump module 110, the first mirror body 120, the thulium-doped gain crystal 130, the optical modulator 140 and the second mirror body 150 are arranged in the position of the shell so that the laser generated by the semiconductor pump module 110 passes through the first mirror body 120, the thulium-doped gain crystal 130, the optical modulator 140 and the second mirror body 150 in sequence and is finally emitted from the outlet of the shell.

[0046] In this embodiment, the semiconductor pump module 110 includes a semiconductor laser and a driver power supply. The driver power supply provides an appropriate current to the semiconductor laser to maintain its proper operating state. This current is a pulsed current that can excite the semiconductor laser to produce laser pulses. In addition, the driver power supply can provide an appropriate voltage to maintain the forward bias of the semiconductor laser to ensure normal operation of the laser. When the semiconductor laser is operating, it generates high-energy photons that are used to excite the subsequent laser medium.

[0047] The first mirror body 120 is used to reflect the generated photons so that the photons propagate back and forth in the laser medium. This helps to form laser oscillations. The first mirror body 120 mainly reflects lasers with a wavelength of 2 microns. Some lasers with other wavelengths can pass through, for example, the laser generated by the semiconductor pump module 110 can pass through the first mirror body 120. The thulium-doped gain crystal 130 is a laser medium, which is a solid-state laser medium doped with thulium. When receiving the energy provided by the semiconductor pump module 110, the thulium-doped gain crystal 130 will produce a laser amplification effect. The optical modulator 140 is used to modulate the frequency, phase or amplitude of the laser, and can be used to adjust the characteristics of the laser to meet the needs of different applications. The second mirror body 150 is a translucent mirror that allows part of the laser to pass through, while the other part is reflected and is used to couple out the laser from the laser.

[0048] The operating principle of the laser oscillator module 100 is as follows: a semiconductor pump module 110 provides energy and excites a thulium-doped gain crystal 130. Laser light from the thulium-doped gain crystal 130 is reflected back and forth by a first mirror 120, resulting in laser oscillation. This laser light is then modulated by an optical modulator 140 to meet the needs of various applications. Finally, a portion of the laser light is output through a second mirror 150, becoming the final laser output.

[0049] Reference Figure 2 In some embodiments of the present invention, a laser oscillator module 100 includes a semiconductor pump module 110 and a resonant cavity. A first mirror 120, a thulium-doped gain crystal 130, an optical modulator 140, the thulium-doped gain crystal 130, and a second mirror 150 are sequentially arranged within the resonant cavity. The centerlines of the first mirror 120, the thulium-doped gain crystal 130, the optical modulator 140, and the second mirror 150 are aligned. The semiconductor pump module 110 is disposed within the resonant cavity and to the side of the thulium-doped gain crystal 130.

[0050] It is understood that the first mirror 120 is a reflector, reflecting only the laser light directed toward the thulium-doped gain crystal 130. The second mirror 150 can be specifically a coupling-out mirror. In this embodiment, the first mirror 120 is coated with a total reflection coating with a reflectivity R > 99.5% for the 0° oscillating laser wavelength. The second mirror 150 is coated with a partial reflection coating with a reflectivity R < 90% for the 0° incident laser wavelength. The thulium-doped gain crystal 130 includes, but is not limited to, rod-shaped and slab-shaped structures.

[0051] It should be noted that, compared to the previous embodiment, this embodiment includes two sets of semiconductor pump modules 110 and thulium-doped gain crystals 130. These two sets of semiconductor pump modules 110 and thulium-doped gain crystals 130 are disposed on either side of the optical modulator 140, with each set of semiconductor pump modules 110 positioned on the side of the same set of thulium-doped gain crystals 130. Both sets of semiconductor pump modules 110 are signal-connected to the mode selection module 200. In this embodiment, the thulium-doped gain crystals 130 are Tm:YAG crystals (thulium-doped yttrium aluminum garnet crystals) with a slab structure. The central wavelength of the semiconductor pump modules 110 is 780 nm, and the pumping method is slab-wide side pumping. The reflectivity R of the second mirror 150 is 70%.

[0052] When the operating mode is continuous operation, the output power can reach 1000W; when the operating mode is continuous Q-switched operation, the peak power can reach 5MW, with a repetition frequency of 100Hz-10kHz; when the operating mode is quasi-continuous operation, the peak power can reach 5kW, with a repetition frequency of 1Hz-1000Hz; when the operating mode is quasi-continuous Q-switched operation, the peak power can reach 1MW, with a repetition frequency of 1Hz-100Hz. By adjusting the repetition frequency of the mode selection module 200, multiple sub-pulse laser outputs can be achieved in the quasi-continuous Q-switched operation mode, which is beneficial to further improve the lithotripsy efficiency and tissue cutting efficiency.

[0053] In some embodiments of the present invention, the laser oscillator module 100 further includes a temperature controller (not shown in the figure), which is used to adjust the temperature of the semiconductor pump module 110 and the thulium-doped gain crystal 130. Specifically, when the semiconductor pump module 110 is continuously pumping, the cooling water temperature of the semiconductor pump module 110 is T1; when the semiconductor pump module 110 is quasi-continuously pumping, the cooling water temperature of the semiconductor pump module 110 is T2. Wherein, T2>T1 to compensate for the absorption efficiency of the blue shift loss of the central wavelength of the semiconductor pump module 110 during quasi-continuous pumping. The cooling water temperature of the thulium-doped gain crystal 130 is T3, where T3>10°C, to prevent frost on the crystal end face from damaging the optical film layer.

[0054] Figure 3 The timing diagram of the laser medical device provided by the embodiment of the present invention in the continuous operation mode and the continuous Q-switched operation mode is illustrated; Figure 4 The following illustrates the timing diagram of the laser medical device provided by the embodiment of the present invention in the quasi-continuous operation mode, the quasi-continuous same-frequency Q-switched operation mode and the quasi-continuous difference-frequency Q-switched operation mode. Figure 3 and Figure 4 In the figure, the X-axis represents time and the Y-axis represents the amplitude of the pulse.

[0055] Reference Figure 1 or Figure 2In some embodiments of the present invention, the mode selection module 200 includes a control circuit 210 and a Q-switched driver 220. The semiconductor pump module 110, the optical modulator 140, and the Q-switched driver 220 are all signal-connected to the control circuit 210. The control circuit 210 is used to control the operating states of the semiconductor pump module 110, the optical modulator 140, and the Q-switched driver 220.

[0056] The control circuit 210 receives operational instructions to switch the pumping mode of the semiconductor pump module 110 (continuous-wave pumping or quasi-continuous-wave pumping) and control the operating states of the Q-switched driver 220 and the optical modulator 140, thereby selecting the operating mode of the optical resonator. When the Q-switched driver 220 and the optical modulator 140 are in the off state, the semiconductor pump module 110 is switched between continuous-wave pumping and quasi-continuous-wave pumping, thereby achieving continuous or quasi-continuous-wave pumping mode. When the Q-switched driver 220 and the optical modulator 140 are in the on state, the semiconductor pump module 110 is switched between continuous-wave pumping and quasi-continuous-wave pumping, thereby achieving continuous or quasi-continuous-wave pumping mode. Among them, the quasi-continuous Q-switching operation mode is divided into quasi-continuous same-frequency Q-switching operation and quasi-continuous difference-frequency Q-switching operation. When the frequency of the Q-switching driver 220 is the same as the quasi-continuous pumping frequency of the semiconductor pump module 110, quasi-continuous same-frequency Q-switching operation is realized, and one pump pulse contains one nanosecond short pulse; when the frequency of the Q-switching driver 220 is different from the quasi-continuous pumping frequency of the semiconductor pump module 110, and the Q-switching frequency is [n / pump pulse width] (n≥2, [] is the rounding symbol), quasi-continuous difference-frequency Q-switching operation is realized, and one pump pulse contains n nanosecond short pulses.

[0057] In some possible embodiments, the control circuit 210 includes a first circuit 211, a second circuit 212, a third circuit 213, and a fourth circuit 214. The Q-switched driver 220 includes a first co-frequency operating state 221 and a second co-frequency operating state 222. The control circuit 210 receives operation instructions to control the pumping mode of the semiconductor pump module 110 and the operating state of the Q-switched driver 220, thereby implementing the switching of the present invention among continuous operation, quasi-continuous operation, continuous Q-switched operation, and quasi-continuous Q-switched operation (including quasi-continuous co-frequency Q-switched operation or quasi-continuous difference frequency Q-switched operation).

[0058] When the control circuit 210 switches to the first circuit 211, the semiconductor pump module 110 continuously pumps and the Q-switched driver 220 is in the off state, the device operation mode is continuous operation, and the laser output timing is as shown in the attached figure. Figure 3 The laser output at this time is a continuous laser sequence 410 with an output power range of 0.1W-200W, which is used for soft tissue cutting.

[0059] When the control circuit 210 switches to the second circuit 212, the semiconductor pump module 110 continuously pumps and the Q-switched driver 220 is in the on state, the device operation mode is continuous Q-switched operation, and the laser output timing is as shown in the attached figure. Figure 3 The laser output at this time is a continuous Q-switched laser sequence of 420, with a peak power of 1W-100kW, a repetition frequency range of 100Hz-10kHz, and a pulse width of 100ns-1000ns, which is used for stone powdering and tissue cutting.

[0060] When the control circuit 210 switches to the third circuit 213, the semiconductor pump module 110 is in quasi-continuous pumping mode and the Q-switched driver 220 is in the off state, the device operation mode is quasi-continuous operation, and the laser output timing is as shown in the attached figure. Figure 4 At this time, the laser output is a quasi-continuous laser sequence 510, with a peak power of 1W-1000W, a repetition frequency range of 1Hz-1000Hz, and a pulse width of 50μs-1000μs, which is used for stone crushing.

[0061] When the control circuit 210 switches to the fourth circuit 214 , the semiconductor pump module 110 performs quasi-continuous pumping and the Q-switched driver 220 is in the on state, and the operation mode of the device is quasi-continuous Q-switched operation.

[0062] When the Q-switched driver 220 switches to the first frequency-matching working state 221, the laser output timing is as shown in the attached figure. Figure 3 As shown, the laser output at this time is a quasi-continuous frequency Q-switched laser timing 520, with an output power of 1W-50kW, a repetition frequency range of 1Hz-100Hz, and a pulse width of 100ns-1000ns, which is used for cutting hard tissues such as calcification or cartilage;

[0063] When the Q-switched driver 220 switches to the second frequency-matching working state 222, the laser output timing is as shown in the attached figure. Figure 3 As shown, the laser output at this time is a quasi-continuous difference frequency Q-switched laser sequence 530, and the average output power is the same as that of the quasi-continuous same frequency Q-switched laser sequence, but the peak power is reduced by about 1 / 3, which can further avoid tissue damage.

[0064] The five operating modes enable rapid switching through the control circuit 210 and Q-switched driver 220. Furthermore, the laser output power, repetition frequency, and pulse width are adjustable over a wide range, ensuring sufficient peak power and pulse duration. A single device can handle a variety of complex medical procedures, including soft tissue cutting, internal stone fragmentation, and calcification, cartilage, and hard tissue resection, improving surgical efficiency and reducing patient risks. Furthermore, the device's simple structure and multifunctionality reduce procurement and surgical costs, promising broad application prospects.

[0065] Reference Figure 1or Figure 2 In some embodiments of the present invention, the fiber coupling module 300 includes a fiber coupler 310 and a shutter 320. The fiber coupler 310 is used to couple the laser light and the indicator light to generate coupled light 350. The output end of the fiber coupler 310 is connected to the optical fiber 330. The shutter 320 is provided at the input end of the fiber coupler 310 or on the optical fiber 330. The optical fiber 330 is also provided with an endoscope 340, which is used to observe the coupled indicator light.

[0066] Specifically, the input end of the fiber coupler 310 is connected to and coupled with the output laser and indicator light of the laser oscillator module 100, and the laser and indicator light are transmitted through the optical fiber 330, wherein the indicator light is visible light and can be emitted by a helium-neon laser and a semiconductor laser; the output end of the fiber coupler 310 is connected to the optical shutter 320, and the optical shutter 320 is controlled by an external foot pedal (not shown in the figure), thereby realizing real-time light output and light blocking during the surgical process. The core diameter of the optical fiber 330 is 100μm-300μm, the numerical aperture is 0.18NA-0.23NA, and it is detachably connected to the fiber coupler 310. In some possible embodiments, the core diameter of the optical fiber 330 is 250μm, and the numerical aperture is 0.22NA. The endoscope 340 is used to provide real-time feedback on the surgical status in the body.

[0067] In some embodiments of the present invention, the resonant cavity includes but is not limited to a plano-planar cavity, a plano-convex cavity, and an unstable cavity.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A laser medical device, characterized in that: include: A laser oscillation module (100) for generating laser light; A mode selection module (200) is connected to the laser oscillation module (100) by signal, and is used to adjust the laser oscillation module (100) so that the laser oscillation module (100) operates in at least a continuous operation mode, a quasi-continuous operation mode, a continuous Q-switched operation mode, a quasi-continuous same-frequency Q-switched operation mode, or a quasi-continuous difference-frequency Q-switched operation mode; The optical fiber coupling module (300) is connected to the outlet of the laser oscillation module (100) and is used for coupling the laser light and the indicator light.

2. The laser medical device according to claim 1, characterized in that The laser oscillation module (100) comprises a semiconductor pump module (110) and a housing, wherein a resonant cavity is provided in the housing; A first mirror body (120), a thulium-doped gain crystal (130), an optical modulator (140), and a second mirror body (150) are sequentially arranged inside the resonant cavity, and center lines of the first mirror body (120), the thulium-doped gain crystal (130), the optical modulator (140), and the second mirror body (150) are located on the same straight line; The semiconductor pump module (110) is arranged outside the resonant cavity and located at one end of the first mirror body (120). The semiconductor pump module (110) is arranged corresponding to the end surface of the thulium-doped gain crystal (130).

3. The laser medical device according to claim 1, wherein: The laser oscillation module (100) includes a semiconductor pump module (110) and a resonant cavity; A first mirror body (120), a thulium-doped gain crystal (130), an optical modulator (140), a thulium-doped gain crystal (130), and a second mirror body (150) are sequentially arranged inside the resonant cavity, and center lines of the first mirror body (120), the thulium-doped gain crystal (130), the optical modulator (140), and the second mirror body (150) are located on the same straight line; The semiconductor pump module (110) is arranged inside the resonant cavity, and the semiconductor pump module (110) is arranged on the side of the thulium-doped gain crystal (130).

4. The laser medical device according to claim 2 or 3, characterized in that: The surface of the first mirror body (120) is coated with a total reflection film for the 0° angle oscillation laser wavelength, and the reflectivity R of the total reflection film is greater than 99.5%; The surface of the second mirror body (150) is coated with a partial reflection film for the wavelength of the laser incident at an angle of 0°, and the reflectivity R of the partial reflection film is ≤90%.

5. The laser medical device according to claim 4, characterized in that: The laser oscillation module (100) further includes a temperature controller, which is used to adjust the temperature of the semiconductor pump module (110) and the thulium-doped gain crystal (130).

6. The laser medical device according to claim 4, characterized in that: The mode selection module (200) comprises a control circuit (210) and a Q-switched driver (220); the semiconductor pump module (110), the optical modulator (140), and the Q-switched driver (220) are all connected to the control circuit (210) by signal; and the control circuit (210) is used to control the operating states of the semiconductor pump module (110), the optical modulator (140), and the Q-switched driver (220).

7. The laser medical device according to claim 4, characterized in that: The optical fiber coupling module (300) comprises an optical fiber coupler (310) and an optical gate (320). The optical fiber coupler (310) is used to couple the laser and the indicator light. The output end of the optical fiber coupler (310) is connected to an optical fiber (330). The optical gate (320) is provided at the input end of the optical fiber coupler (310) or at the optical fiber (330).

8. The laser medical device according to claim 7, characterized in that: The optical fiber (330) is further provided with an endoscope (340), and the endoscope (340) is used to observe the coupled indicator light.

9. The laser medical device according to any one of claims 5 to 8, characterized in that: The thulium-doped gain crystal (130) includes a rod-shaped structure and a slab structure.

10. The laser medical device according to any one of claims 5 to 8, characterized in that: The resonant cavity includes a plano-planar cavity, a plano-convex cavity and an unstable cavity.

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