Thulium-thulium double-cavity laser and multifunctional laser treatment device

Abstract

The utility model relates to the technical field of laser medical equipment, and provides a thulium-thulium double-cavity laser and a multifunctional laser treatment device, and the laser comprises a low repetition frequency thulium laser oscillation amplification cavity which is used for outputting first thulium laser with repetition frequency of 100-1000Hz and monopulse peak power greater than 20,000 watts; the high repetition frequency thulium laser oscillation amplification cavity is used for outputting second thulium laser with repetition frequency greater than 1kHz and average power greater than 100W; the thulium laser homogenizing and coupling coaxial device is used for homogenizing, coupling and coaxially outputting the laser with different repetition frequencies; the low-high repetition frequency laser power supply is used for selectively supplying power to the low repetition frequency thulium laser oscillation amplification cavity and the high repetition frequency thulium laser oscillation amplification cavity; by selectively utilizing the first thulium laser and the second thulium laser, hard or large stones can be completely smashed, the operation cutting speed can be increased, the operation time can be shortened, in addition, damage of the thulium laser to surrounding normal tissues is small, safety and reliability are improved, and the device is simple and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of laser medical equipment, in particular to a thulium-thulium dual-cavity laser and a multifunctional laser treatment device. Background Art

[0002] Laser medical equipment is a type of equipment that uses laser technology for medical treatment or surgery, and plays an important role in the medical field. Taking urology laser medical equipment as an example, compared with single-function urology 2-micron laser medical equipment, multifunctional urology 2-micron laser medical equipment has many advantages: the medical equipment with lithotripsy function and the medical equipment with soft tissue ablation and resection function are combined into one multifunctional medical equipment, which reduces the equipment procurement cost and improves the equipment use efficiency; lithotripsy and soft tissue ablation and resection are combined into one operation, which reduces the difficulty and risk of the operation, shortens the patient's treatment time, and reduces the patient's pain and medical expenses.

[0003] At present, the 2-micron laser medical devices for urology on the market are mainly holmium laser medical devices, thulium laser medical devices and holmium-thulium laser medical devices.

[0004] Among them, most holmium laser medical equipment adopts the technical solution of combining 4 holmium laser beams, with laser repetition rate no more than 80Hz, average power greater than 100W, and single pulse peak power of kilowatt level. Holmium laser medical equipment has been widely used in urology lithotripsy. Clinical studies have shown that the shortcomings of holmium laser medical equipment technology include: first, it cannot achieve powdered lithotripsy well, especially for hard or large stones. The fragmented lithotripsy needs to be completed with the help of stone removal instruments, especially for domestic holmium laser medical equipment. This phenomenon is more obvious; second, holmium laser medical equipment is easy to form splitting injuries and bleeding during urology soft tissue ablation and resection surgery, resulting in high surgical risks and long patient recovery period. In addition, the working repetition rate of holmium laser medical equipment is low, which reduces the speed of soft tissue ablation and resection.

[0005] Thulium laser medical equipment includes fiber thulium laser medical equipment and all-solid thulium laser medical equipment. Among them, fiber thulium laser medical equipment has a laser repetition rate greater than 1kHz, an average power greater than 100W, and a single pulse peak power that is relatively low at the hundred-watt level; clinical studies have shown that fiber thulium laser medical equipment has a good effect in the direction of soft tissue ablation and resection in urology, with less surgical bleeding, fast ablation and resection speed, and fast patient recovery, and has been well received by doctors and patients; however, the application of fiber thulium laser medical equipment in the direction of lithotripsy in urology urgently needs to further improve the single pulse peak power, because the laser single pulse peak power is too low to crush stones of general hardness, and the lithotripsy surgery can only be completed with the help of holmium laser medical equipment.

[0006] All-solid-state thulium laser medical equipment has a laser repetition rate generally less than 500Hz, an average power greater than 100W, and a single-pulse peak power of kilowatts. Its application in urological soft tissue ablation and resection surgery is limited by the laser repetition rate parameters. At the same time, in urological lithotripsy surgery, the laser single-pulse peak power is not high enough, resulting in hard or large stones cannot be completely powdered.

[0007] In short, the above-mentioned holmium laser medical equipment and thulium laser medical equipment technologies have deficiencies. The equipment either has unsatisfactory clinical effects in urological lithotripsy, or has unsatisfactory clinical effects in urological malignant tumor ablation and benign prostatic hyperplasia resection. For this reason, technicians have developed holmium-thulium laser medical equipment, but the medical equipment has a complex structure, high procurement cost and high energy consumption.

[0008] Therefore, how to improve the safety and reliability of multifunctional laser treatment devices and reduce equipment costs has become an important issue that needs to be solved urgently. Utility Model Content

[0009] The utility model provides a thulium-thulium dual-cavity laser and a multifunctional laser treatment device, which are used to solve the problems of low safety and reliability, complex equipment and high cost of treatment devices in the prior art. The utility model has the advantages of high safety and reliability, simple structure and low cost.

[0010] The utility model provides a thulium-thulium dual-cavity laser, comprising:

[0011] The low repetition rate thulium laser oscillator amplifying cavity comprises a first pump source, a first high-reflection mirror, a first gain medium, a first Q-switching switch and a first output mirror arranged coaxially along the optical path; the first gain medium is a thulium ion doped (Tm 3+ ) crystal; the transmittance of the first output mirror is not less than 15%; it is suitable for outputting a first thulium laser with a repetition rate of 100-1000Hz and a single pulse peak power greater than 20,000 watts;

[0012] A high repetition rate thulium laser oscillator amplifying cavity, comprising a second pump source, and a second high-reflection mirror, a second gain medium, a second Q-switched switch and a second output mirror coaxially arranged along an optical path; the transmittance of the second output mirror is less than 15%; and the cavity is suitable for outputting a second thulium laser with a repetition rate greater than 1kHz and an average power greater than 100 watts;

[0013] A thulium laser homogenizing coupling coaxial device is used for homogenizing and coupling the first thulium laser and the second thulium laser with different repetition rates to output them in a coaxial manner;

[0014] The low-high repetition rate laser power supply is suitable for selectively supplying power to the low repetition rate thulium laser oscillation amplification cavity and the high repetition rate thulium laser oscillation amplification cavity to selectively output the first thulium laser and the second thulium laser.

[0015] According to a thulium-thulium dual-cavity laser provided by the utility model, the second gain medium includes thulium-doped ions (Tm 3+ ) crystal and fiber optic media.

[0016] According to a thulium-thulium dual-cavity laser provided by the utility model, the thulium laser homogenization coupling coaxial device includes a waveguide homogenization coupler, an angle homogenization coupler, and a space homogenization coupler.

[0017] According to a thulium-thulium dual-cavity laser provided by the utility model, the low-high repetition rate laser power supply includes a low repetition rate laser power supply and a high repetition rate laser power supply which are separately arranged, the low repetition rate laser power supply is used to power the low repetition rate thulium laser oscillation amplification cavity, and the high repetition rate laser power supply is used to power the high repetition rate thulium laser oscillation amplification cavity;

[0018] Or the low-high repetition rate laser power supply selectively supplies power to the low repetition rate thulium laser oscillation amplification cavity and the high repetition rate thulium laser oscillation amplification cavity through a single-pole double-throw switch.

[0019] According to the utility model, a thulium-thulium dual-cavity laser is provided, which also includes a cooling device for providing cooling for the low-repetition-rate thulium laser oscillation amplification cavity and the high-repetition-rate thulium laser oscillation amplification cavity.

[0020] According to a thulium-thulium dual-cavity laser provided by the utility model, the cooling device includes a water chiller; there are two water chillers, which are used to provide cooling for the low-repetition-rate thulium laser oscillation amplification cavity and the high-repetition-rate thulium laser oscillation amplification cavity respectively;

[0021] Or there is one water cooler, which is used to provide cooling for the low repetition rate thulium laser oscillation amplifier cavity and the high repetition rate thulium laser oscillation amplifier cavity in parallel.

[0022] The utility model also provides a multifunctional laser treatment device, comprising any one of the thulium-thulium dual-cavity lasers described above;

[0023] Also includes an optical fiber, an optical fiber coupler and an indicator light source;

[0024] The optical fiber coupler is connected to the output end of the thulium laser homogenizing coupling coaxial device, and is used to couple the first thulium laser and the second thulium laser with different repetition rates into the optical fiber;

[0025] The indicating light source is used to output indicating light, and the indicating light is coupled into the optical fiber through the optical fiber coupler to locate the position of the laser.

[0026] A multifunctional laser treatment device according to the utility model also includes:

[0027] A selection module, used for generating and sending selection instructions;

[0028] A controller, which is in communication with the selection module and is adapted to receive the selection instruction and control the low-high repetition rate laser power supply to selectively supply power to the low repetition rate thulium laser oscillation amplification cavity and the high repetition rate thulium laser oscillation amplification cavity based on the selection instruction;

[0029] An enable switch is communicatively connected to the controller and is used to generate and send an enable signal. The controller turns on or off the connection between the low-high repetition rate laser power supply and the low repetition rate thulium laser oscillation amplification cavity or the high repetition rate thulium laser oscillation amplification cavity based on the enable signal.

[0030] According to the multifunctional laser treatment device provided by the utility model, it also includes a human-computer interaction module;

[0031] The human-computer interaction module is communicatively connected with the controller for receiving command input; the command includes a selection command and a modification command of various parameters of the low-repetition-rate thulium laser oscillation amplification cavity and the high-repetition-rate thulium laser oscillation amplification cavity.

[0032] According to the multifunctional laser treatment device provided by the utility model, it also includes an endoscope; the human-computer interaction module includes a display screen;

[0033] The endoscope is used to collect image information of the affected area and feed the image information back to the display screen for display.

[0034] According to a multifunctional laser treatment device provided by the utility model, the enabling switch includes a foot switch.

[0035] The utility model provides a thulium-thulium dual-cavity laser and a multifunctional laser treatment device, which can output a first thulium laser with a repetition rate of 100-1000Hz and a single-pulse peak power greater than 20,000 watts, which is beneficial for completely crushing hard or large stones, and can also output a second thulium laser with a repetition rate greater than 1kHz and an average laser power greater than 100 watts, which is beneficial for improving the surgical cutting speed and shortening the operation time. Compared with the holmium laser, the absorption coefficient of the human soft tissue to the thulium laser is large, the penetration depth is small, and the damage to the surrounding normal tissue is small. The safety and reliability are improved, and the device is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be 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.

[0037] Figure 1 This is one of the structural intentions of the laser treatment device method provided by the embodiment of the utility model;

[0038] Figure 2 This is the second structural intention of the laser treatment device method provided in the embodiment of the utility model.

[0039] Reference numerals:

[0040] 10. Low repetition rate thulium laser oscillation amplifier cavity; 11. High repetition rate thulium laser oscillation amplifier cavity; 12. Low-high repetition rate laser power supply; 120. Low repetition rate laser power supply; 121. High repetition rate laser power supply; 13. Thulium laser homogenization coupling coaxial device; 14. Single-pole double-throw switch; 15. Cooling device; 20. Optical fiber; 21. Optical fiber coupler; 22. Indicator light source; 23. Controller; 24. Enable switch; 25. Human-computer interaction module; 26. Endoscope. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] In order to facilitate the understanding of the thulium-thulium dual-cavity laser and multifunctional laser treatment device provided by the utility model, its application background is first explained. At present, the 2-micron laser medical equipment for urology on the market is mainly holmium laser medical equipment, thulium laser medical equipment and holmium-thulium laser medical equipment.

[0043] Most holmium laser medical devices use a four-way holmium laser beam combining technology solution, with a laser repetition rate of no more than 80Hz, an average power of more than 100W, and a single-pulse peak power of kilowatts.

[0044] However, the above-mentioned holmium laser medical equipment cannot effectively achieve powdered lithotripsy, especially for hard or large stones. The fragmented lithotripsy requires the use of stone removal instruments to complete the lithotripsy surgery. In addition, the holmium laser medical equipment is prone to cause splitting injuries and bleeding during the soft tissue ablation and resection surgery in urology, resulting in high surgical risks and long patient recovery periods. In addition, the working repetition rate of the holmium laser medical equipment is low, which reduces the speed of soft tissue ablation and resection.

[0045] Thulium laser medical equipment includes fiber thulium laser medical equipment and all-solid-state thulium laser medical equipment. Among them, for fiber thulium laser medical equipment, the laser repetition rate is greater than 1kHz, the average power is greater than 100W, and the single-pulse peak power is relatively low at the hundred-watt level; for all-solid-state thulium laser medical equipment, the laser repetition rate is generally less than 500Hz, the average power is greater than 100W, and the single-pulse peak power is at the kilowatt level.

[0046] However, the application of the above-mentioned fiber thulium laser medical equipment in urological lithotripsy surgery urgently needs to further improve the single-pulse peak power, because the laser single-pulse peak power is too low to crush stones of average hardness, and the lithotripsy surgery must be completed with the help of holmium laser medical equipment; all-solid-state thulium laser medical equipment is limited by the laser repetition rate parameters. At the same time, in the application of urological lithotripsy surgery, the laser single-pulse peak power is not high enough, resulting in hard or large stones cannot be completely powdered.

[0047] To this end, technicians have developed a holmium-thulium laser medical device, which integrates the functions of a holmium laser medical device and a thulium laser medical device, demonstrating its multifunctionality in urological surgery. However, the medical device has a complex structure, high procurement cost, and high energy consumption.

[0048] Therefore, how to improve the safety and reliability of multifunctional laser treatment devices and reduce equipment costs has become an important issue that needs to be solved urgently.

[0049] In actual applications, it is found that laser lithotripsy is mainly dominated by the mechanical force between the laser and the tissue, and other forces play an auxiliary role, which requires high-peak power pulsed laser medical equipment to complete; while laser soft tissue resection is mainly dominated by the thermal force between the laser and the tissue, and other forces play an auxiliary role, which requires high-average power laser medical equipment.

[0050] However, high-average-power holmium laser medical equipment is prone to cause fission damage when vaporizing and destroying prostate tissue, and is prone to bleeding during surgery, resulting in long surgery time, long patient recovery period, and high surgical risks. In addition, this type of high-average-power laser is limited by the radiation pump source device, and the working repetition rate is low, which reduces the surgical cutting speed.

[0051] The absorption coefficient of thulium laser in human soft tissue is large, which is more than 1.6 times that of holmium laser. The penetration depth is less than 0.5mm, and the damage to surrounding normal tissue is small. Therefore, thulium laser medical equipment has good application prospects in the treatment of urological diseases, such as urological lithotripsy, malignant tumor ablation, benign prostatic hyperplasia resection and other surgeries.

[0052] Based on the above problems and findings, the utility model provides a thulium-thulium dual-cavity laser and a multifunctional laser treatment device, which have the advantages of high safety and reliability, simple structure and low cost.

[0053] Combine the following Figure 1-Figure 2 The utility model describes a thulium-thulium dual-cavity laser and a multifunctional laser treatment device.

[0054] Reference Figure 1 and Figure 2 A thulium-thulium dual-cavity laser comprises a low-repetition-rate thulium laser oscillation amplification cavity 10, a high-repetition-rate thulium laser oscillation amplification cavity 11, a thulium laser homogenization coupling coaxial device 13 and a low-high repetition-rate laser power supply 12; the low-repetition-rate thulium laser oscillation amplification cavity 10 comprises a first pump source, and a first high-reflection mirror, a first gain medium, a first Q-switching switch and a first output mirror coaxially arranged along an optical path, wherein the first gain medium is a thulium ion-doped (Tm 3+ ) crystal, the transmittance of the first output mirror is not less than 15%, and is suitable for outputting the first thulium laser with a repetition rate of 100-1000Hz and a single pulse peak power greater than 20,000 watts.

[0055] The high repetition rate thulium laser oscillation amplifier cavity 11 includes a second pump source, and a second high-reflection mirror, a second gain medium, a second Q-switched switch and a second output mirror coaxially arranged in the source light path, wherein the transmittance of the second output mirror is less than 15%, and is suitable for outputting a second thulium laser with a repetition rate greater than 1kHz and an average power greater than 100 watts.

[0056] The thulium laser homogenizing coupling coaxial device 13 is used to homogenize and couple the first thulium laser and the second thulium laser of different repetition rates to coaxially output; the low-high repetition rate laser power supply 12 is suitable for selectively powering the low repetition rate thulium laser oscillation amplifier cavity 10 and the high repetition rate thulium laser oscillation amplifier cavity 11 to selectively output the first thulium laser and the second thulium laser.

[0057] In an actual application scenario, when performing lithotripsy in urology, the low-high repetition rate laser power supply 12 provides power to the low repetition rate thulium laser oscillation amplifier cavity 10, the first pump source emits pump light and excites the first gain medium to generate radiation, the repetition frequency of the Q-switched switch operates at 100-1000Hz, and the radiation oscillates and amplifies under the action of the first high-reflection mirror, the first gain medium and the first output mirror, and the output repetition rate is 100-1000Hz, the single pulse peak power is greater than 20,000 watts of the first thulium laser, and the transmittance of the first output mirror is not less than 15%, which can reduce the peak power density of the device surface in the low repetition rate thulium laser oscillation amplifier cavity 10 to ensure that it is not damaged. The first thulium laser is output to the affected area through the thulium laser homogenization coupling coaxial device 13 for lithotripsy. The single pulse peak power of the first thulium laser is high, which is conducive to completely crushing hard or large stones.

[0058] In another practical application scenario, when performing urological ablation surgery, the high repetition rate thulium laser oscillation amplifier cavity 11 is provided with electric energy through the low-high repetition rate laser power supply 12, the second pump source emits pump light and excites the second gain medium to generate radiation, the repetition frequency of the Q-switched switch is operated at a frequency greater than 1kHz, and the radiation is oscillated and amplified under the action of the second high-reflection mirror, the second gain medium and the second output mirror, and the second thulium laser with a repetition rate greater than 1kHz and an average power greater than 100 watts is output, and the transmittance of the second output mirror is less than 15%, ensuring precise control of the output power, and the second thulium laser is output to the affected area through the thulium laser homogenization coupling coaxial device 13 for ablation resection. The high repetition rate of the second thulium laser is beneficial to increase the surgical cutting speed and shorten the operation time.

[0059] Compared with the related art, the thulium-thulium dual-cavity laser provided in the embodiment of the utility model can output a first thulium laser with a repetition rate of 100-1000Hz and a single-pulse peak power greater than 20,000 watts, which is beneficial for completely crushing hard or large stones, and can also output a second thulium laser with a repetition rate greater than 1kHz and an average laser power greater than 100 watts, which is beneficial for improving the surgical cutting speed and shortening the operation time. Compared with the holmium laser, the absorption coefficient of the human soft tissue for the thulium laser is large, the penetration depth is small, and the damage to the surrounding normal tissue is small. Its safety and reliability are improved, and the device is simple and the cost is low.

[0060] In a specific embodiment of the utility model, a first high-reflection mirror, a first gain medium and a first output mirror are arranged in sequence to form a first group of resonant cavities, a first Q-switched switch is arranged in the resonant cavity, for example, it can be located between the first high-reflection mirror and the first gain medium, a first pump source is fixed around the periphery of the first gain medium, after power is supplied, the pump light emitted by the first pump source is irradiated into the first gain medium, the first gain medium is stimulated to radiate to generate thulium laser, the thulium laser is amplified by feedback oscillation in the resonant cavity, and under the regulation of the first Q-switched switch, a thulium laser with a specific single pulse peak power and repetition frequency is obtained.

[0061] In a specific embodiment of the utility model, the first high-reflection mirror adopts a 0° high-reflection mirror in the 1.91-2.07 μm band, and the reflectivity is not less than 99%; the first gain medium adopts thulium ion doped (Tm 3+ ) crystal, specifically, Tm:YAG crystal, Tm:YLF crystal, Tm:YAP crystal, Tm in the crystal 3+The doping concentration of ions is less than 5at.%; the first gain medium is a rod-shaped structure as a whole, with a length greater than 60mm and a diameter less than 5mm; the first pump source adopts a 780-795nm series semiconductor laser, and the output power is greater than 400W; the first Q-switching switch adopts an acousto-optic / electro-optic Q-switch in the 1.91-2.07μm band; the first output mirror adopts a 0° output mirror in the 1.91-2.07μm band, and the transmittance in the 1.91-2.07μm band is not less than 15%; the first high-reflection mirror, the first Q-switching switch, the first gain medium and the first output mirror are coaxially fixedly installed on the same plane inside the aluminum alloy cavity.

[0062] In a specific embodiment of the utility model, the first high-reflection mirror adopts a 0° high-reflection mirror in the 1.91-2.07 μm band, and the reflectivity is greater than 99.5%; the first gain medium adopts a Tm:YAG crystal, and the Tm in the crystal 3+ The doping concentration of ions is less than 3.5 at.%; the diameter of the first gain medium is 3 mm and the total length is 105 mm, which includes a Tm:YAG crystal located in the middle part and a 19 mm long white YAG crystal bonded to both ends of the Tm:YAG crystal to reduce reabsorption; the first gain medium is plated with a 0° anti-reflection film in the 1.91-2.07 μm band on both end faces, and the transmittance is greater than 99.5%; the first pump source adopts a 785nm continuous wave semiconductor laser array, the array is a 1×6 horizontal array, the power of the pump light output by each array is greater than 300W, and the total output pump light power of the three-dimensional side pumping structure is greater than 900W; the first Q-switching switch adopts a 1.91-2.07 μm band acousto-optic Q switch for modulating the laser repetition frequency and pulse width; the transmittance of the first output mirror is 40%.

[0063] The low repetition rate thulium laser oscillation amplifying cavity 10 with the above structure can output the first thulium laser with a repetition rate of 100-1000 Hz and a single pulse peak power greater than 20,000 watts, which is suitable for lithotripsy in urology.

[0064] The specific structure of the high repetition rate thulium laser oscillation amplifier cavity 11 is similar to that of the low repetition rate thulium laser oscillation amplifier cavity 10, wherein the second high-reflection mirror, the second gain medium and the second output mirror are arranged in sequence to form a second group of resonant cavities, and the second Q-switched switch is arranged in the resonant cavity, for example, it can be located between the second high-reflection mirror and the second gain medium, and the second pump source is fixed around the periphery of the second gain medium. After power is supplied, the pump light emitted by the second pump source is irradiated into the second gain medium, and the second gain medium is stimulated to radiate to generate thulium laser, which is amplified by feedback oscillation in the resonant cavity, and under the regulation of the second Q-switched switch, a thulium laser with a specific repetition frequency and average power is obtained.

[0065] In a specific embodiment of the utility model, the second high-reflection mirror adopts a 0° high-reflection mirror in the 1.91-2.07 μm band, and the reflectivity is not less than 99%; the second gain medium adopts thulium ion doped (Tm 3+ ) crystal, specifically, Tm:YAG crystal, Tm:YLF crystal, Tm:YAP crystal, Tm in the crystal 3+ The doping concentration of ions is less than 5at.%; the second gain medium is a rod-shaped structure as a whole, with a length greater than 60mm and a diameter less than 5mm; the second pump source adopts a 780-795nm series semiconductor laser, and the output power is greater than 400W; the second Q-switching switch adopts an acousto-optic / electro-optic Q-switch in the 1.91-2.07μm band; the second output mirror adopts a 0° output mirror in the 1.91-2.07μm band, and the transmittance in the 1.91-2.07μm band is less than 15%; the second high-reflection mirror, the second Q-switching switch, the second gain medium and the second output mirror are coaxially fixedly installed on the same plane inside the aluminum alloy cavity.

[0066] In a specific embodiment of the utility model, the second high-reflection mirror adopts a 0° high-reflection mirror in the 1.91-2.07 μm band, and the reflectivity is greater than 99.5%; the second gain medium adopts a Tm:YAG crystal, and the Tm in the crystal 3+ The doping concentration of the ions is less than 3.5 at.%; the diameter of the second gain medium is 3 mm and the total length is 105 mm, which includes a Tm:YAG crystal located in the middle part and a 19 mm long white YAG crystal bonded to both ends of the Tm:YAG crystal to reduce reabsorption; the second gain medium is plated with a 0° anti-reflection film in the 1.91-2.07 μm band on both end faces, and the transmittance is greater than 99.5%; the second pump source adopts a 785 nm continuous wave semiconductor laser array, the array is a 1×6 horizontal array, the power of the pump light output by each array is greater than 300 W, and the total output pump light power of the three-dimensional side pumping structure is greater than 900 W; the second Q-switching switch adopts a 1.91-2.07 μm band acousto-optic Q switch for modulating the laser repetition frequency and pulse width; the transmittance of the second output mirror is 10%.

[0067] Specifically, the high repetition rate thulium laser oscillator cavity outputs laser operation modes including pulse and continuous wave.

[0068] The high repetition rate thulium laser oscillation amplifying cavity 11 with the above structure can output a second thulium laser with a repetition rate greater than 1kHz and an average power greater than 100 watts, which can be applied to ablation of malignant tumors in urology, resection of benign prostatic hyperplasia and other human soft tissue resection surgeries.

[0069] It should be noted that, compared with other types of lasers, solid-state lasers using solid laser materials as gain media have efficient excitation mechanisms and effective pumping mechanisms, and thus can achieve higher single-pulse energy output. Therefore, in order to enable the low-repetition-rate thulium laser oscillator amplifier cavity 10 to output a thulium laser with a single-pulse peak power greater than 20,000 watts, the first gain medium is selected from thulium ions (Tm 3+ ) crystal. For the high repetition rate thulium laser oscillation amplification cavity 11, the repetition rate of its output laser is greater than 1kHz, the average power is greater than 100 watts, and the single pulse peak power requirement is relatively low. This can also be achieved by using lasers of other types of gain media. Therefore, in another embodiment, the second gain medium also includes an optical fiber medium.

[0070] The first thulium laser with different repetition rates output by the low repetition rate thulium laser oscillation amplification cavity 10 or the second thulium laser with different repetition rates output by the high repetition rate thulium laser oscillation amplification cavity 11 is homogenized and coupled coaxially and outputted through the thulium laser homogenization coupling coaxial device 13 .

[0071] In some embodiments, there are multiple options for the thulium laser homogenizing coupling coaxial device 13, for example, a waveguide homogenizing coupler, an angle homogenizing coupler, a space homogenizing coupler, etc. may be used.

[0072] In this embodiment, the thulium laser homogenizing coupling coaxial device 13 is an angle homogenizing coupler.

[0073] It should be noted that the thulium laser homogenization coupling coaxial device 13 of various principles described above can be obtained commercially, and its specific structure can refer to the existing technology. The embodiment of the utility model does not make any changes to its structure or principle. Therefore, the specific structure of the thulium laser homogenization coupling coaxial device 13 in the embodiment of the utility model will not be described in detail.

[0074] In practical applications, the low-high repetition rate laser power supply 12 selectively supplies power to the low repetition rate thulium laser oscillation amplifier cavity 10 and the high repetition rate thulium laser oscillation amplifier cavity 11 to selectively output the first thulium laser and the second thulium laser. The first thulium laser and the second thulium laser with different repetition rates are homogenized and coupled through the thulium laser homogenization coupling coaxial device 13 and output coaxially.

[0075] In a specific embodiment of the present invention, referring to Figure 2The low-high repetition rate laser power supply 12 includes a low repetition rate laser power supply 120 and a high repetition rate laser power supply 121 which are separately arranged, wherein the low repetition rate laser power supply 120 is used to power the low repetition rate thulium laser oscillation amplification cavity 10, and the high repetition rate laser power supply 121 is used to power the high repetition rate thulium laser oscillation amplification cavity 11. According to the required working mode, the low repetition rate laser power supply 120 and the high repetition rate laser power supply 121 are selectively started, and the low repetition rate thulium laser oscillation amplification cavity 10 and the high repetition rate thulium laser oscillation amplification cavity 11 can be selectively powered, so as to realize the selective output of the first thulium laser and the second thulium laser.

[0076] However, the above power supply method will make the device more complicated and the cost higher. Therefore, in order to simplify the structure and reduce the cost, in another specific embodiment of the utility model, Figure 1 A low-high repetition rate laser power supply 12 is provided, which can output the current required by the low repetition rate thulium laser oscillation amplification cavity 10 and the high repetition rate thulium laser oscillation amplification cavity 11 according to actual needs, and it selects one of the low repetition rate thulium laser oscillation amplification cavity 10 and the high repetition rate thulium laser oscillation amplification cavity 11 through the single-pole double-throw switch 14. According to the required working mode, a pair of low repetition rate thulium laser oscillation amplification cavity 10 and high repetition rate thulium laser oscillation amplification cavity 11 is selected through the single-pole double-throw switch 14 to power the low repetition rate thulium laser oscillation amplification cavity 10 and the high repetition rate thulium laser oscillation amplification cavity 11, thereby realizing the selective output of the first thulium laser and the second thulium laser.

[0077] Of course, the low-high repetition rate laser power supply 12 includes but is not limited to the above-mentioned methods. Other methods or principles of low-high repetition rate laser power supply 12 are also applicable, as long as one can be selected to power the low repetition rate thulium laser oscillation amplifier cavity 10 and the high repetition rate thulium laser oscillation amplifier cavity 11 according to actual needs.

[0078] In order to ensure the stable operation of the laser, an effective thermal management system is often particularly important. By effectively dissipating heat, the stability of the laser can be maintained and the laser medium can be prevented from being damaged by overheating, thereby achieving higher power output. Therefore, the thulium-thulium dual-cavity laser also includes a cooling device 15 for providing cooling for the low-repetition-rate thulium laser oscillation amplifier cavity 10 and the high-repetition-rate thulium laser oscillation amplifier cavity 11.

[0079] In a specific embodiment of the utility model, the cooling device 15 includes a water cooler; a water cooler can be provided, and the water circuit of the water cooler adopts a two-way parallel output mode, thereby providing cooling for the low-repetition-rate thulium laser oscillation amplifier cavity 10 and the high-repetition-rate thulium laser oscillation amplifier cavity 11 in parallel, which can make the overall device simpler, more compact, and relatively low in cost.

[0080] Two water coolers may be provided, and the two water coolers provide cooling for the low repetition rate thulium laser oscillation amplification cavity 10 and the high repetition rate thulium laser oscillation amplification cavity 11 respectively, so as to improve the cooling efficiency.

[0081] The two water cooling methods described above can be selected according to actual needs.

[0082] It is understandable that for solid-state lasers that use solid laser materials as gain media, water cooling can often ensure cooling efficiency, but for other types of lasers, such as fiber lasers, air cooling can also meet cooling requirements.

[0083] Therefore, in another specific embodiment of the utility model, when the second gain medium in the high repetition rate thulium laser oscillation amplifier cavity 11 adopts optical fiber medium, the water cooling device may include a water cooler and an air cooler, wherein the water cooler is used to cool the low repetition rate thulium laser oscillation amplifier cavity 10, and the air cooler is used to cool the high repetition rate thulium laser oscillation amplifier cavity 11.

[0084] The cooling device 15 can provide cooling for the low repetition rate thulium laser oscillation amplification cavity 10 and the high repetition rate thulium laser oscillation amplification cavity 11 to ensure stable operation of the laser and higher power output.

[0085] The multifunctional laser treatment device provided by the present invention is described below. The multifunctional laser treatment device described below and the thulium-thulium dual-cavity laser described above can be referred to each other.

[0086] Reference Figure 1 and Figure 2 A multifunctional laser treatment device includes the above-mentioned thulium-thulium dual-cavity laser; it also includes an optical fiber 20, an optical fiber coupler 21 and an indicator light source 22; wherein the optical fiber coupler 21 is connected to the output end of the thulium laser homogenizing coupling coaxial device 13, and is used to couple the first thulium laser and the second thulium laser with different repetition rates into the optical fiber 20; the optical fiber 20 is used to transmit lasers with different repetition rates to the surgical site; the indicator light source 22 is used to output indicator light, which is visible light, and the specific wavelength can be 0.53um. The indicator light is coupled to the optical fiber 20 through the optical fiber coupler 21, and is used for the human eye to observe the position of the thulium laser during the operation, thereby improving the accuracy of the operation.

[0087] For ease of control, refer to Figure 1 and Figure 2The multifunctional laser treatment device also includes a selection module, a controller 23 and an enable switch 24; wherein the selection module is used to generate and send a selection instruction; the controller 23 is communicated with the selection module, can receive the selection instruction, and based on the selection instruction, controls the low-high repetition rate laser power supply 12 to select one of the low repetition rate thulium laser oscillation amplification cavity 10 and the high repetition rate thulium laser oscillation amplification cavity 11 to supply power; the enable switch 24 is communicated with the controller 23, and is used to generate and send an enable signal, and the controller 23 turns on or off the connection between the low-high repetition rate laser power supply 12 and the low repetition rate thulium laser oscillation amplification cavity 10 or the high repetition rate thulium laser oscillation amplification cavity 11 based on the enable signal.

[0088] In an actual application scenario, the doctor triggers a selection instruction through the selection module, for example, he can select a urological lithotripsy or a urological ablation resection surgery. The controller 23 controls the low-high repetition rate laser power supply 12 to power the low-repetition rate thulium laser oscillation amplifier cavity 10 or the high-repetition rate thulium laser oscillation amplifier cavity 11 based on the selection instruction. When the low-repetition rate thulium laser oscillation amplifier cavity 10 or the high-repetition rate thulium laser oscillation amplifier cavity 11 is running stably, the enable signal is triggered by the enable switch 24. The controller 23 controls the conduction / disconnection of the low-high repetition rate laser power supply 12 and the low-repetition rate thulium laser oscillation amplifier cavity 10 or the high-repetition rate thulium laser oscillation amplifier cavity 11 based on the enable signal to generate / stop the first thulium laser or the second thulium laser.

[0089] Specifically, the enabling switch 24 may be a foot switch.

[0090] For ease of control, in a specific embodiment of the utility model, the multifunctional laser treatment device also includes a human-computer interaction module 25; the human-computer interaction module 25 is communicatively connected to the controller 23 for receiving command inputs, the commands including selection commands and modification commands for various parameters of the low-repetition-rate thulium laser oscillation amplifying cavity 10 and the high-repetition-rate thulium laser oscillation amplifying cavity 11.

[0091] In an actual application scenario, the doctor can modify the various parameters of the low-repetition-rate thulium laser oscillation amplifier cavity 10 and the high-repetition-rate thulium laser oscillation amplifier cavity 11, such as repetition frequency, single-pulse peak power, average power, etc., through the human-computer interaction module 25 according to the actual surgical needs, so that the first thulium laser can be set within the repetition rate of 100Hz to 1000Hz, the nanosecond thulium laser, the laser single-pulse peak power is greater than 20,000 watts, the repetition rate of the second thulium laser is greater than 1kHz, and the laser average power is greater than 100 watts. The multifunctional laser treatment device can be used for ablation of malignant tumors in urology, resection of benign prostatic hyperplasia and other human soft tissue resection operations.

[0092] In a specific embodiment of the utility model, the human-computer interaction module 25 includes a display screen, which is used to display the working parameters of each device, such as the water temperature of the cooling device 15, the various parameters of the low-repetition-rate thulium laser oscillation amplification cavity 10 and the high-repetition-rate thulium laser oscillation amplification cavity 11, etc., so that the doctor can intuitively monitor the parameters of each device and adjust the parameters of each device in time according to actual needs.

[0093] In a specific embodiment of the present invention, the above-mentioned modification instruction is typed through the display screen.

[0094] In a specific embodiment of the utility model, the selection module is configured as a touch key on a display screen. For example, there are two touch keys for urological lithotripsy and urological ablation resection on the display screen. The doctor triggers the selection instruction by touching the corresponding touch key, and the corresponding thulium laser oscillation amplification cavity operates.

[0095] Reference Figure 1 and Figure 2 The multifunctional laser treatment device also includes an endoscope 26, which is used to collect image information of the affected area and feed the image information back to the display screen for display.

[0096] The endoscope 26 allows doctors to monitor the condition of the affected area in real time, facilitates doctors to perform surgery, and ensures that the surgery is performed accurately and safely.

[0097] The novelty of the present invention is that the thulium-thulium dual-cavity laser and the multifunctional laser treatment device provided in the embodiments of the present invention can output a first thulium laser with a repetition rate of 100-1000Hz and a single-pulse peak power greater than 20,000 watts, which is beneficial for completely crushing hard or large stones, and can also output a second thulium laser with a repetition rate greater than 1kHz and an average laser power greater than 100 watts, which is beneficial for increasing the surgical cutting speed and shortening the operation time. Compared with the holmium laser, the absorption coefficient of the human soft tissue for the thulium laser is large, the penetration depth is small, and the damage to the surrounding normal tissue is small. Its safety and reliability are improved, and the device is simple and the cost is low.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 utility model.

Claims

1. A thulium-thulium dual-cavity laser, characterized in that: include: A low repetition rate thulium laser oscillation amplifying cavity (10) comprises a first pump source, a first high-reflection mirror, a first gain medium, a first Q-switching switch and a first output mirror coaxially arranged along an optical path; the first gain medium is a thulium ion-doped (Tm 3+ ) crystal; the transmittance of the first output mirror is not less than 15%; it is suitable for outputting a first thulium laser with a repetition rate of 100-1000Hz and a single pulse peak power greater than 20,000 watts; A high repetition rate thulium laser oscillation amplifying cavity (11) comprises a second pump source, and a second high-reflection mirror, a second gain medium, a second Q-switching switch and a second output mirror coaxially arranged along an optical path; the transmittance of the second output mirror is less than 15%; Applicable to the second thulium laser with an output repetition rate greater than 1kHz and an average power greater than 100W; A thulium laser homogenizing coupling coaxial device (13) is used for homogenizing, coupling and coaxially outputting a first thulium laser and a second thulium laser of different repetition rates; The low-high repetition rate laser power supply (12) is suitable for selectively supplying power to the low repetition rate thulium laser oscillation amplification cavity (10) and the high repetition rate thulium laser oscillation amplification cavity (11) to selectively output a first thulium laser and a second thulium laser.

2. The thulium-thulium dual-cavity laser according to claim 1, characterized in that: The second gain medium includes thulium ions (Tm 3+ ) crystal and fiber optic media.

3. The thulium-thulium dual-cavity laser according to claim 1, characterized in that: The thulium laser homogenizing coupling coaxial device (13) comprises a waveguide homogenizing coupler, an angle homogenizing coupler and a space homogenizing coupler.

4. The thulium-thulium dual-cavity laser according to claim 1, characterized in that: The low-high repetition rate laser power supply (12) comprises a low repetition rate laser power supply (120) and a high repetition rate laser power supply (121) which are separately arranged, the low repetition rate laser power supply (120) being used to supply power to the low repetition rate thulium laser oscillation amplification cavity (10), and the high repetition rate laser power supply (121) being used to supply power to the high repetition rate thulium laser oscillation amplification cavity (11); Or the low-high repetition rate laser power supply (12) selectively supplies power to the low repetition rate thulium laser oscillation amplification cavity (10) and the high repetition rate thulium laser oscillation amplification cavity (11) via a single-pole double-throw switch (14).

5. The thulium-thulium dual-cavity laser according to any one of claims 1 to 4, characterized in that: It also includes a cooling device (15) for providing cooling for the low-repetition-rate thulium laser oscillation amplification cavity (10) and the high-repetition-rate thulium laser oscillation amplification cavity (11).

6. The thulium-thulium dual-cavity laser according to claim 5, characterized in that: The cooling device (15) comprises a water cooler; there are two water coolers, which are used to provide cooling for the low repetition rate thulium laser oscillation amplification cavity (10) and the high repetition rate thulium laser oscillation amplification cavity (11) respectively; Or there is one water cooling machine, which is used to provide cooling for the low repetition rate thulium laser oscillation amplification cavity (10) and the high repetition rate thulium laser oscillation amplification cavity (11) in parallel.

7. A multifunctional laser treatment device, characterized in that: A thulium-thulium dual-cavity laser comprising the thulium-thulium dual-cavity laser as described in any one of claims 1 to 6; It also includes an optical fiber (20), an optical fiber coupler (21) and an indicator light source (22); The optical fiber coupler (21) is connected to the output end of the thulium laser homogenizing coupling coaxial device (13) and is used to couple the first thulium laser and the second thulium laser with different repetition rates into the optical fiber (20); The indicating light source (22) is used to output indicating light, and the indicating light is coupled into the optical fiber (20) through the optical fiber coupler (21) and is used to locate the position of the laser.

8. The multifunctional laser treatment device according to claim 7, characterized in that: Also includes: A selection module, used for generating and sending selection instructions; A controller (23) is connected in communication with the selection module, adapted to receive the selection instruction, and based on the selection instruction, controls the low-high repetition rate laser power supply (12) to selectively supply power to the low repetition rate thulium laser oscillation amplification cavity (10) and the high repetition rate thulium laser oscillation amplification cavity (11); An enable switch (24) is connected in communication with the controller (23) and is used to generate and send an enable signal, and the controller (23) switches on or off the connection between the low-high repetition rate laser power supply (12) and the low repetition rate thulium laser oscillation amplifier cavity (10) or the high repetition rate thulium laser oscillation amplifier cavity (11) based on the enable signal.

9. The multifunctional laser treatment device according to claim 8, characterized in that: Also includes a human-computer interaction module (25); The human-machine interaction module (25) is communicatively connected with the controller (23) and is used to receive command input; the command includes a selection command and a modification command for various parameters of the low-repetition-rate thulium laser oscillation amplification cavity (10) and the high-repetition-rate thulium laser oscillation amplification cavity (11).

10. The multifunctional laser treatment device according to claim 9, characterized in that: It also includes an endoscope (26); the human-machine interaction module (25) includes a display screen; The endoscope (26) is used to collect image information of the affected area and feed the image information back to the display screen for display.

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