CN105167848B - A kind of high-power semiconductor laser surgery systems - Google Patents

Abstract

A high-power semiconductor laser surgery system, including a semiconductor laser light source, the semiconductor laser light source is connected to the medical laser optical fiber, the semiconductor laser light source is electrically connected to the laser power supply and control system, the laser power supply and control system are electrically connected to the laser cooling system, the laser power supply and The control system is electrically connected with the foot switch. When working, the indicating light source emits indicating laser light, which enters the optical fiber after being shaped and coupled; the single-tube semiconductor laser is controlled to emit laser light by stepping on the foot switch, and the laser enters the optical fiber after being shaped and coupled to work. Use the laser and the indicating laser to couple into a beam of light, enter the medical laser fiber, step on the foot switch, output the laser, perform the cutting operation and stop the bleeding at the same time, with high power, safety and reliability, small thermal damage, good hemostatic effect It has the characteristics of long life, good stability, easy portability and application.

Description

A high-power semiconductor laser surgery system

technical field

The invention relates to the technical field of using high-power semiconductor laser to treat human soft tissue, in particular to a high-power semiconductor laser surgery system.

Background technique

At present, green laser medical equipment has been applied in clinical practice. For example, the use of green laser in the clinical treatment of soft tissue gasification cutting has gained a lot of practice, and has fully proved the safety and effectiveness of its technology. Compared with the previous "gold standard" and "transurethral resection of the prostate" TURP, this technique has fewer side effects. The hemoglobin absorption rate of green laser is similar to that of water, which is 10 ^-3 /cm, as shown in Figure 1. However, the hemoglobin absorption rate of blue laser is 10 ³ /cm, about one order of magnitude higher than that of green laser. Therefore, it can be expected that blue laser is easier to perform soft tissue resection surgery, the heat-affected zone is smaller, and the hemostatic effect is also greatly improved. At present, there is still no precedent for using blue laser in soft tissue cutting surgery in the world.

The green laser is obtained by optically pumping laser crystals to obtain 1064nm infrared lasers, and then using infrared lasers to obtain 532nm frequency doubled lasers through frequency doubling crystals. The electro-optical efficiency of the entire conversion process is about 10%, and a large amount of waste heat needs to be discharged through water cooling. The design of the built-in water cooling device makes the entire surgical equipment bulky and extremely noisy. Compared with solid-state lasers, semiconductor lasers have high electro-optic conversion efficiency is their biggest advantage. Based on this advantage, water cooling can be removed from the low-power surgical system, and air cooling can be used instead. Furthermore, it is possible to make the low-power surgical system miniaturized, portable, low-noise, and long-life.

At present, the semiconductor blue laser power technology of To56 package is mature and has been commercialized, with an output power of 1.6W and an electro-optical efficiency of 26.7%. The expected life is more than 10000 hours. Coupling 1.6W blue light into 105um optical fiber, the efficiency can reach more than 90%. Combine multiple optical fiber-coupled semiconductor blue lasers through fiber combining technology to obtain a power output of 10W or 30W, and its efficiency is also above 90%. By calculation, the electro-optical efficiency of the whole machine can reach more than 20%. Laser 10W output, power consumption 50W, 30W output, power consumption 150W, can meet heat dissipation requirements through air cooling, therefore, blue laser portability is feasible.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a high-power semiconductor laser surgery system, which can utilize multiple single-tube semiconductor lasers to emit low-power blue lasers, and couple multiple blue lasers into high-power blue lasers. For soft tissue cutting, it has the characteristics of high power, safety and reliability, and less thermal damage.

In order to achieve the above object, the technical scheme that the present invention takes is:

A high-power semiconductor laser surgery system includes a semiconductor laser light source 1, the semiconductor laser light source 1 is connected to a medical laser fiber 2, and the emitted laser light is output through the medical laser fiber 2, the semiconductor laser light source 1 is connected to a laser power supply and The control system 5 is electrically connected, the laser power supply and the control system 5 control the semiconductor laser light source 1, and provide power for the semiconductor laser light source 1, the laser power supply and the control system 5 are electrically connected with the laser cooling system 3, and control the laser cooling system 3 To cool the semiconductor laser light source 1, the laser power supply and control system 5 are electrically connected to the foot switch 4, and the foot switch 4 controls the working state of the laser power supply and control system 5.

The semiconductor laser light source 1 includes a plurality of single-tube coupling modules 6, and the single-tube coupling module 6 is coupled out through an optical fiber 9; the semiconductor laser light source 1 also includes a single indicator light source 7, and the indicator light source 7 is output through an optical fiber 9 The optical fiber 9 is coupled through the optical fiber combining device 8;

The single-tube coupling module 6 includes two single-tube semiconductor lasers 10 with vertical polarization states. The single-tube semiconductor laser 10 is connected to a shaping lens 11, and the shaping lens 11 is connected to a polarization coupling prism 12 through a laser. The coupling prism 12 and the coupling focusing lens 13 are connected by a laser, and the coupling focusing lens 13 is connected to the optical fiber 9 by a laser. The coupling focusing lens 13 and the optical fiber 9 are packaged in the coupling sleeve shell by means of pressing and fixing or glue fixing. In the body 15, the blue laser light emitted by the single-tube semiconductor laser 10 is output after being shaped by the shaping lens 11, and the two blue laser beams are polarized and coupled into a beam of light by the polarization coupling prism 12 and then output, and coupled into the laser beam by the coupling focusing lens 13. Optical fiber 9 for output.

The single-tube coupling module 6 includes a single single-tube semiconductor laser 10, the single-tube semiconductor laser 10 is connected to a shaping lens 11, the shaping lens 11 is connected to a coupling focusing lens 13 by laser, and the coupling focusing lens 13 is connected to an optical fiber 9 Connected by laser, the coupling focusing lens 13 and the optical fiber 9 are packaged in the coupling sleeve housing 15 by means of compression or glue fixing, and the single-tube semiconductor laser 10 can emit frequency in continuous or pulsed mode. Adjustable, adjustable duty cycle, adjustable power blue laser, the adjustable range of the duty cycle of the blue laser is 1-100%, the adjustable range of power is 0.1-300.0W, the blue laser passes through the shaping lens 11 is output after shaping, and coupled into the optical fiber 9 through the coupling focusing lens 13 for output.

The single-tube coupling module 6 includes a plurality of single-tube semiconductor lasers 10, the single-tube semiconductor lasers 10 are connected to the shaping lens 11, the shaping lens 11 is connected to the deflection mirror 14 by laser, and the deflection mirror 14 is connected to the coupling focus The lens 13 is connected by a laser, and the coupling focusing lens 13 and the optical fiber 9 are connected by a laser, and the coupling focusing lens 13 and the optical fiber 9 are packaged in the coupling sleeve housing 15 by means of pressing and fixing or glue fixing. The blue laser light emitted by the single-tube semiconductor laser 10 is shaped by the shaping lens 11 and then output. The deflection mirror 14 converges multiple blue laser lights into a beam of light for output. It is coupled into the optical fiber 9 by the coupling focusing lens 13 for output.

The coupling focusing lens 13 includes one lens or a lens group composed of multiple lenses, and the lenses are spherical or aspherical lenses.

The optical fiber beam combining device 8 includes a coupling lens 17, the coupling lens 17 is installed in the coupling lens seat 16, and the optical fiber connector 18 is also arranged in the coupling lens seat 16, and the optical fiber connector 18 is used for fixing medical Laser Fiber 2,

The optical fiber combining device 8 is a (N+M+1)*1 type structure, that is, N+M+1 road input, 1 road output, wherein, the N road input is a blue laser of 440nm-460nm, and the M road input is One or a combination of 808nm, 980nm and 1470nm lasers, one input is the indicating laser; the input end of the optical fiber combining device 8 is located behind the output end of the optical fiber 9, and the optical fiber 9 will be coupled to the single tube in the module 6 The output laser and the indicator laser output from the indicator light source 7 are input to the coupling lens 17 in the fiber beam combining device 8, coupled into a beam of light through the coupling lens 17, enter the medical laser fiber 2, and output.

The indicating light source 7 can emit an indicating laser for positioning the working position, and the indicating laser is a red 635nm laser or a green 532nm laser.

The output mode of the front end of the medical laser optical fiber 2 includes straight output along the axis of the fiber or side output at a certain angle with the axis of the optical fiber.

The laser cooling system 3 includes a heat sink 19 and a TEC temperature control device 20, the heat sink 19 is located below the single-tube semiconductor laser 10, and the heat emitted by the single-tube semiconductor laser 10 is transferred out through the heat sink 19, and the TEC temperature The control device 20 is located under the heat sink 19, absorbs the heat of the heat sink 19, and releases and discharges it through air cooling.

Working principle of the present invention is:

The present invention can use multiple single-tube semiconductor lasers to emit low-power blue lasers, couple multiple blue lasers into high-power blue lasers, and use the characteristic that blue lasers are strongly absorbed by hemoglobin to output blue lasers and transmit them to human diseased soft tissues. Excision was performed, and the good water absorption properties of laser were used to stop bleeding. When the system is working, the indicating light source 7 starts to work and emits indicating laser light, which is output through the optical fiber 9 and coupled into the medical laser optical fiber 2 through the optical fiber combining device 8 to prompt the operator to work. According to the operator's needs, control instructions are sent to the laser power supply and control system 5 by stepping on and releasing the foot switch 4 . After receiving the instructions, the laser power supply and control system 5 controls whether the single-tube semiconductor laser 10 emits laser light for work. The single-tube semiconductor laser 10 emits low-power laser light, which is reshaped by the shaping lens 11 and then output. The laser is coupled into a beam of high-power laser light by the polarization coupling prism 12 or the deflection mirror 14 and then output, and then coupled into the optical fiber 9 by the coupling focusing lens 13. , for output. N pieces of optical fibers 9 carrying laser light for cutting, M pieces of optical fibers 9 carrying laser light for hemostasis, and 1 optical fiber 9 carrying indicating laser light are input to the coupling lens 17 in the fiber combining device 8, and are coupled into one through the coupling lens 17. Beam light enters the medical laser fiber 2 for output. Step on the foot switch 4, the single-tube semiconductor laser 10 normally outputs laser light, the laser used for cutting is used for cutting operations, and the laser used for hemostasis is used for hemostasis in the operation; loosen the foot switch, and the single-tube semiconductor laser 10 stops outputting Laser, laser output interrupted, surgery suspended.

The beneficial effects of the present invention are:

The present invention can use multiple single-tube semiconductor lasers to emit low-power blue lasers, couple multiple blue lasers into high-power blue lasers, and use the characteristic that blue lasers are strongly absorbed by hemoglobin to output blue lasers and transmit them to human diseased soft tissues. Excision was performed, and the good water absorption properties of laser were used to stop bleeding. The life of the single-tube semiconductor laser used in the invention is more than 10,000 hours, the whole system is stable and reliable, the life cycle is long, and the volume of the laser is small, easy to carry, and beneficial to practical application. The invention has the characteristics of safety, reliability, small heat damage, good hemostatic effect, long service life, good stability, and easy portability and application.

Description of drawings

Figure 1 is a schematic diagram of the laser absorption spectrum.

Fig. 2 is a structural schematic diagram of the present invention.

FIG. 3 is a schematic structural view of the semiconductor laser light source 1 of the present invention.

Fig. 4a is a schematic structural diagram of a single-tube coupling module 6 comprising two single-tube semiconductor lasers 10 with vertical polarization states according to the present invention.

FIG. 4 b is a schematic structural diagram of a single-tube coupling module 6 including a single single-tube semiconductor laser 10 of the present invention.

FIG. 4c is a schematic structural diagram of a single-tube coupling module 6 including multiple single-tube semiconductor lasers 10 according to the present invention.

Fig. 5a is a schematic structural view of an embodiment of the fiber combining device 8 of the present invention.

Fig. 5b is a schematic structural view of another embodiment of the fiber combining device 8 of the present invention.

FIG. 6 is a structural schematic diagram of the laser cooling system 3 of the present invention.

FIG. 7 is a diagram of the working state of pulses emitted by the single-tube semiconductor laser 10 of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Referring to Fig. 2, the present invention is a kind of high-power semiconductor laser surgery system, comprises semiconductor laser light source 1, and described semiconductor laser light source 1 is connected with medical laser fiber 2, and the emitted laser light is output through medical laser fiber 2, and described semiconductor laser light source Laser light source 1 is electrically connected with laser power supply and control system 5, and described laser power supply and control system 5 controls semiconductor laser light source 1, and provides power supply for semiconductor laser light source 1, and described laser power supply and control system 5 are electrically connected with laser cooling system 3 Connect and control the laser cooling system 3 to cool the semiconductor laser light source 1, the laser power supply and control system 5 are electrically connected to the foot switch 4, and the foot switch 4 controls the working state of the laser power supply and control system 5.

Referring to Fig. 3, the semiconductor laser light source 1 includes a plurality of single-tube coupling modules 6, and the single-tube coupling module 6 is coupled out through an optical fiber 9; the semiconductor laser light source 1 also includes a single indicator light source 7, and the indicator light source 7 Output through the optical fiber 9; the optical fiber 9 is coupled through the optical fiber combining device 8; the optical fiber combining device 8 combines the laser beams in a plurality of optical fibers 9, couples them into the medical laser optical fiber 2, and passes through the medical laser optical fiber 2 output.

Referring to Fig. 4a, the single-tube coupling module 6 includes two single-tube semiconductor lasers 10 with vertical polarization states, the single-tube semiconductor laser 10 is connected to a shaping lens 11, and the shaping lens 11 is connected to a polarization coupling prism 12 through a laser The polarization coupling prism 12 is connected to the coupling focusing lens 13 by laser, the coupling focusing lens 13 is connected to the optical fiber 9 by laser, and the coupling focusing lens 13 and the optical fiber 9 are packaged in the In the coupling sleeve housing 15, the blue laser light emitted by the single-tube semiconductor laser 10 is output after being shaped by the shaping lens 11, and the two blue laser beams are polarized and coupled into a beam of light by the polarization coupling prism 12, and then output, and focused by coupling The lens 13 is coupled into the optical fiber 9 for output.

Referring to Fig. 4b, the single tube coupling module 6 includes a single single tube semiconductor laser 10, the single tube semiconductor laser 10 is connected with the shaping lens 11, the shaping lens 11 is connected with the coupling focusing lens 13 by laser, and the coupling focusing The lens 13 and the optical fiber 9 are connected by a laser, and the coupling focusing lens 13 and the optical fiber 9 are packaged in the coupling sleeve housing 15 by means of pressing and fixing or adhesive fixing. The single-tube semiconductor laser 10 can be connected in a continuous manner or The pulse mode emits blue laser with adjustable frequency, adjustable duty cycle and adjustable power. The laser light is output after being shaped by the shaping lens 11, coupled into the optical fiber 9 by the coupling focusing lens 13, and output.

Referring to Fig. 4c, the single-tube coupling module 6 includes a plurality of single-tube semiconductor lasers 10, the single-tube semiconductor lasers 10 are connected to a shaping lens 11, and the shaping lens 11 is connected to a deflection mirror 14 through a laser, and the deflection mirror 14 is connected to the coupling focusing lens 13 by laser, and the coupling focusing lens 13 is connected to the optical fiber 9 by laser. Among them, the blue laser light emitted by the single-tube semiconductor laser 10 is output after being shaped by the shaping lens 11, a plurality of blue laser lights are converged into a beam of light by the deflection mirror 14 and then output, and coupled into the optical fiber 9 through the coupling focusing lens 13 for output .

The coupling focusing lens 13 includes one lens or a lens group composed of multiple lenses, and the lenses are spherical or aspherical lenses.

Referring to Fig. 5a and Fig. 5b, the optical fiber combining device 8 includes a coupling lens 17, and the coupling lens 17 is installed in a coupling lens seat 16, and an optical fiber connector 18 is also arranged in the coupling lens seat 16, and the optical fiber The connector 18 is used to fix the medical laser optical fiber 2,

The optical fiber combining device 8 is a (N+M+1)*1 type structure, that is, N+M+1 road input, 1 road output, wherein, the N road input is a blue laser of 440nm-460nm, and the M road input is One or a combination of 808nm, 980nm and 1470nm lasers, one input is the indicating laser; the input end of the optical fiber combining device 8 is located behind the output end of the optical fiber 9, and the optical fiber 9 will be coupled to the single tube in the module 6 The output laser and the indicator laser output from the indicator light source 7 are input to the coupling lens 17 in the fiber beam combining device 8, coupled into a beam of light through the coupling lens 17, enter the medical laser fiber 2, and output.

The indicating light source 7 can emit an indicating laser for positioning the working position, and the indicating laser is a red 635nm laser or a green 532nm laser.

The output mode of the front end of the medical laser optical fiber 2 includes straight output along the axis of the fiber or side output at a certain angle with the axis of the optical fiber.

6, the laser cooling system 3 includes a heat sink 19 and a TEC temperature control device 20, the heat sink 19 is located below the single-tube semiconductor laser 10, and the heat emitted by the single-tube semiconductor laser 10 is transferred out through the heat sink 19, The TEC temperature control device 20 is located under the heat sink 19, absorbs the heat of the heat sink 19, and releases and discharges it through air cooling.

When the system is working, the indicating light source 7 starts to work and emits indicating laser light, which is output through the optical fiber 9 and coupled into the medical laser optical fiber 2 through the optical fiber combining device 8 to prompt the operator to work. According to the operator's needs, control instructions are sent to the laser power supply and control system 5 by stepping on and releasing the foot switch 4 . After receiving the instructions, the laser power supply and control system 5 controls whether the single-tube semiconductor laser 10 emits laser light for work. The single-tube semiconductor laser 10 emits low-power laser light, which is reshaped by the shaping lens 11 and then output. The laser is coupled into a beam of high-power laser light by the polarization coupling prism 12 or the deflection mirror 14 and then output, and then coupled into the optical fiber 9 by the coupling focusing lens 13. , for output. N pieces of optical fibers 9 carrying laser light for cutting, M pieces of optical fibers 9 carrying laser light for hemostasis, and 1 optical fiber 9 carrying indicating laser light are input to the coupling lens 17 in the fiber combining device 8, and are coupled into one through the coupling lens 17. Beam light enters the medical laser fiber 2 for output. Step on the foot switch 4, the single-tube semiconductor laser 10 normally outputs laser light, the laser used for cutting is used for cutting operations, and the laser used for hemostasis is used for hemostasis in the operation; loosen the foot switch, and the single-tube semiconductor laser 10 stops outputting Laser, laser output interrupted, surgery suspended.

In Figure 1, the hemoglobin absorption characteristic of the blue laser is an order of magnitude higher than that of the green laser, reaching 10 ³ /cm; the water absorption is similar to that of the green laser, both at 10 ^-3 /cm. Utilizing the characteristic that the blue laser is strongly absorbed by hemoglobin, the radiation is transmitted to the soft tissue of the human body for excision. The soft tissue may be the soft tissue of nasal cavity, stomach, urinary, gynecological, anorectal and other related parts.

The laser energy is generated by the single-tube semiconductor laser 10, which can be continuous (CW) or pulsed. In Figure 7 the pulsed working state is shown. The pulse frequency is adjustable, the duty cycle is adjustable from 1% to 100%, and the laser power is adjustable from 0.1W to 30W. The medical laser optical fiber 2 transmits the laser energy output by the semiconductor laser light source to the soft tissue of the human body, and the output from the front end of the optical fiber can be straight along the axis of the optical fiber or sideways at a certain angle with the axis of the optical fiber. For example, the core diameter of the medical laser fiber 2 is 200um, and the front-end output is the direct light output mode.

Fig. 2 is a structural representation of the present invention, as can be seen from the figure, semiconductor laser light source 1 is connected with medical laser fiber 2, the laser output that sends by medical laser fiber 2, semiconductor laser light source 1 and laser power supply and control system 5 Electrically connected, the laser power supply and control system 5 controls the semiconductor laser light source 1 and provides power for the semiconductor laser light source 1, the laser power supply and control system 5 is electrically connected to the laser cooling system 3, and controls the laser cooling system 3 to cool the semiconductor laser light source 1 , the laser power supply and the control system 5 are electrically connected with the foot switch 4, and the foot switch 4 controls the working state of the laser power supply and the control system 5.

The laser power supply and control system 5 supplies power to all the single-tube semiconductor lasers 10 and the pointing laser 7, and controls the output laser power, which is continuously adjustable. Provide man-machine operation interface, control and work in the way of touch display interface. The touch display interface is provided with hemostasis and cutting buttons, which can control and adjust the power and wavelength of the hemostatic output laser and the cutting output laser. For example, the output laser for hemostasis can be infrared light with a wavelength of 980nm, the output laser for cutting can be a blue laser with a wavelength of 450nm, and the indicating light can be a laser with a wavelength of 635nm. Control the foot switch 4 and detect the working state of the system. The air cooling system 3 is controlled and the temperature of the heat sink 19 is monitored in real time. Once the temperature changes, the semiconductor laser is kept at a constant temperature through the automatic control of the TEC temperature control device 20 . High-efficiency and stable laser operation is achieved through TEC's high-precision temperature control. The optimized design of the TEC temperature control device 20 reduces the volume of the laser surgery system.

FIG. 3 is a schematic structural view of the semiconductor laser light source 1 of the present invention. The semiconductor laser light source 1 is mainly composed of a single tube coupling module 6 , an indicating light source 7 and a fiber combining device 8 . The N single-tube coupling modules 6 are all coupled and output through the optical fiber 9, and the N optical fibers 9 are coupled into a medical laser optical fiber 2 through the optical fiber combining device 8, so as to obtain higher energy laser output. Similarly, the M single-tube coupling modules 6 are all coupled and output through the optical fiber 9, and the M optical fibers 9 are coupled into a medical laser optical fiber 2 through the optical fiber combining device 8 to obtain higher energy laser output. Assuming that the energy aW output by each single-tube coupling module 6 is, the total output energy of the laser is N*aW+M*aW. For example, the output power of each single-mode coupling module is 2W, and the total output power of blue laser is 120W by using 60 modes to combine beams.

It can also be seen from FIG. 3 that the indicator light source 7 is coupled out through the optical fiber 9, and then coupled into the medical laser optical fiber 2 through the optical fiber combining device 8 together with N beams of laser light, and delivered to the diseased soft tissue of the human body. The laser light emitted by the indicating light source 7 can be a red 635nm laser or a green 532nm laser. When working, the indicator light source 7 continues to work, and is not controlled by the foot switch 4, and is used to help the operator determine the laser working position when not performing laser cutting. For example, using 635nm red indicator light, the laser power is 5mW.

4a-4c are structural schematic diagrams of the single-pipe coupling module 6 of the present invention. The single-tube coupling module 6 continuously emits or pulses polarized laser light from the single-tube semiconductor laser 10 . In the single-tube coupling module 6 including two single-tube semiconductor lasers 10 with vertical polarization states, the two single-tube semiconductor lasers 10 with vertical polarization states emit laser light, which is shaped by a shaping lens 11 and combined into a beam of light by a polarization coupling prism 12 , coupled into the optical fiber 9 through the coupling focusing lens 13 . In the single-tube coupling module 6 including a single single-tube semiconductor laser 10 , the single-tube semiconductor laser 10 emits laser light, and after being shaped by the shaping lens 11 , it is coupled into the optical fiber 9 through the coupling focusing lens 13 . In the single-tube coupling module 6 including multiple single-tube semiconductor lasers 10, multiple single-tube semiconductor lasers 10 emit laser light, after being shaped by the shaping lens 11, they are converged into a beam of spatial light by the deflection mirror 14, and coupled into the beam by the coupling focusing lens 13. Fiber 9. The coupling focusing lens 13 can be a spherical or aspherical lens, and can be a lens group composed of one lens or multiple lenses. The coupling focusing lens 13 and the optical fiber 9 are packaged in the coupling sleeve housing 15, and can be fixed by pressing or glue fixed. For example, the dual-single tube polarization coupling method is adopted, and the single tube is packaged in To56. Each single tube outputs 1.6W of laser with a wavelength of 447nm, and the output power of the coupling fiber is 2W.

5a-5b are structural schematic diagrams of the fiber combining device 8 of the present invention. The optical fiber combining device 8 is a (N+M+1)*1 type structure, that is, N+M+1 input and 1 output, wherein the N input is a blue laser of 440nm-460nm for cutting soft tissue. The M channel input is one or a combination of 808nm, 980nm and 1470nm lasers, and the good water absorption characteristics of the lasers of this wavelength are used for hemostasis. The single-tube semiconductor laser 10 that emits laser light with this wavelength can switch the wavelength of the emitted laser light according to the control of the laser power supply and the control system 5, so that the operator can control and adjust the wavelength of the laser light according to specific conditions. One input is 635nm red or 532nm green indicating laser. The low-power laser is combined into one high-power laser output through the fiber combiner 8. The obtained high-power laser can be used for soft tissue cutting. N input lasers are 440nm-460nm blue lasers, and one input is 635nm red or 532nm green indicating laser. 1 output laser fiber transmits laser energy to the diseased tissue that needs to be resected, such as the tissue surface of the ureter and renal pelvis. The input optical fiber is a multimode small core diameter thin fiber, and one output optical fiber is a multimode optical fiber with a core diameter ranging from 200um to 760um. For example, adopt 71*1 type structure, 60 channels of 2W 447nm blue laser input, 10 channels of 2W 980nm infrared laser input, 1 channel of 635nm red laser output, the input fiber 9 adopts 105um core diameter fiber, and the output medical laser fiber 2A fiber with a core diameter of 200um is used.

Referring to Fig. 5a, the input end of the fiber combining device 8 is located behind the output end of the optical fiber 9, and the optical fiber 9 inputs the laser output from the single tube coupling module 6 and the indicating laser output from the indicating light source 7 into the fiber combining device 8 The coupling lens 17 is coupled into a beam of light through the coupling lens 17, enters the medical laser fiber 2, and outputs it. Referring to FIG. 5 b , the output end of the optical fiber 9 is connected to the input end of the fiber combiner 21 , and the output end of the fiber combiner 21 is connected to the input end of the bundled optical fiber 22 . The input end of the optical fiber beam combining device 8 is positioned at the output end rear of the beam combining optical fiber 22, and the optical fiber 9 inputs the laser output in the single-tube coupling module 6 and the indicating laser output in the indicating light source 7 into the coupling in the optical fiber beam combining device 8. The lens 17 is coupled into a beam of light through the coupling lens 17, enters the medical laser fiber 2, and outputs it.

FIG. 6 is a schematic structural diagram of the laser cooling system 3 of the present invention. The laser cooling system 3 includes a heat sink 19 and a TEC temperature control device 20. All single-tube semiconductor lasers 10 are fixed on the same heat sink 19. The material of the heat sink 19 is copper, brass or other materials with good thermal conductivity. The heat emitted by the single-tube semiconductor laser 10 is transferred out through the heat sink 19 . Below the heat sink 19 is the TEC temperature control device 20, which can absorb the heat of the heat sink 19 and discharge it from the system through air cooling, while ensuring that the heat sink 19 is in a constant temperature state. High-efficiency and stable laser operation is achieved through TEC's high-precision temperature control. The optimized TEC temperature-controlled cooling system design reduces the volume of the laser surgery system.

FIG. 7 is a working state diagram of pulses emitted by the single-tube semiconductor laser 10 of the present invention. As shown in FIG. 7 , t0-t1 means that the semiconductor laser light source 1 normally outputs laser light, and the foot switch 4 is in a depressed state at this time. t1-t2 is the operation pause state, at this time the foot switch 4 is released, and the laser output is interrupted.

In the figure, 1 is a semiconductor laser light source, 2 is a medical laser fiber, 3 is a laser cooling system, 4 is a foot switch, 5 is a laser power supply and control system, 6 is a single tube coupling module, 7 is an indicator light source, 8 is an optical fiber Beam combining device, 9 is an optical fiber, 10 is a single-tube semiconductor laser, 11 is a shaping lens, 12 is a polarization coupling prism, 13 is a coupling focusing lens, 14 is a deflection mirror, 15 is a coupling sleeve shell, 16 is a coupling lens seat , 17 is a coupling lens, 18 is an optical fiber connector, 19 is a heat sink, 20 is a TEC temperature control device, 21 is an optical fiber combiner, and 22 is a bundled optical fiber.

Claims (8)

1. A high-power semiconductor laser surgery system is characterized in that: comprise semiconductor laser light source (1), described semiconductor laser light source (1) is connected with medical laser optical fiber (2), sends out by medical laser optical fiber (2) The laser output of the semiconductor laser light source (1) is electrically connected to the laser power supply and control system (5), and the laser power supply and control system (5) controls the semiconductor laser light source (1), and is the semiconductor laser light source (1) Power is provided, the laser power supply and control system (5) are electrically connected to the laser cooling system (3), and the laser cooling system (3) is controlled to cool the semiconductor laser light source (1), and the laser power supply and control system (5) Electrically connected with the foot switch (4), the foot switch (4) controls the working state of the laser power supply and the control system (5); Described semiconductor laser light source (1) comprises a plurality of single-tube coupling modules (6), and described single-tube coupling module (6) is coupled output by optical fiber (9); Described optical fiber (9) adopts the optical fiber of 105um core diameter; So The semiconductor laser light source (1) also includes a single indicator light source (7), and the indicator light source (7) is output through an optical fiber (9); the optical fiber (9) is coupled through an optical fiber combining device (8); the optical fiber The beam combining device (8) combines the laser beams in the multiple optical fibers (9), couples them into the medical laser fiber (2), and outputs them through the medical laser fiber (2); the medical laser fiber (2) adopts 200- 760um core diameter fiber; The optical fiber beam combining device (8) includes a coupling lens (17), the coupling lens (17) is installed in the coupling lens seat (16), and an optical fiber connector (18) is also arranged in the coupling lens seat (16) ), the optical fiber connector (18) is used to fix the medical laser optical fiber (2); The optical fiber combining device (8) is a (N+M+1)*1 type structure, that is, N+M+1 input, 1 output, wherein, N input is a blue laser of 440nm-460nm, and M The input is one or a combined laser of 808nm, 980nm and 1470nm, and one input is an indicating laser; the input end of the optical fiber combining device (8) is located behind the output end of the optical fiber (9), and the optical fiber (9) ) input the laser light output in the single-tube coupling module (6) and the indicator laser light output in the indicator light source (7) into the coupling lens (17) in the fiber beam combiner (8), and couple into a bundle through the coupling lens (17) The light enters the medical laser fiber (2) for output, the output blue laser power is 120W, and the output 980nm laser is 20W; the N blue laser is used for soft tissue cutting and vaporization, and the M infrared laser is used for soft tissue coagulation and hemostasis. 2. A kind of high-power semiconductor laser surgery system according to claim 1, characterized in that: said single-tube coupling module (6) comprises two single-tube semiconductor lasers (10) with vertical polarization states, said single-tube The semiconductor laser (10) is connected with the shaping lens (11), the shaping lens (11) is connected with the polarization coupling prism (12) by laser, and the polarization coupling prism (12) is connected with the coupling focusing lens (13) by laser, The coupling focusing lens (13) is connected to the optical fiber (9) by laser, and the coupling focusing lens (13) and the optical fiber (9) are packaged in the coupling sleeve housing (15) by means of compression or glue fixing. Among them, the blue laser light emitted by the single-tube semiconductor laser (10) is output after being shaped by the shaping lens (11), and the polarization coupling prism (12) is used to couple the two blue laser light into a beam of light and then output, and focus through coupling The lens (13) is coupled into the optical fiber (9) for output. 3. A kind of high-power semiconductor laser surgery system according to claim 1, characterized in that: the single-tube coupling module (6) comprises a single single-tube semiconductor laser (10), and the single-tube semiconductor laser (10) Connect with shaping lens (11), described shaping lens (11) is connected with coupling focus lens (13) by laser, described coupling focus lens (13) is connected with optical fiber (9) by laser, described coupling focus lens (13) ) and the optical fiber (9) are packaged in the coupling sleeve housing (15) by means of pressing and fixing or adhesive fixing, and the single-tube semiconductor laser (10) can emit frequency-adjustable, occupying A blue laser with adjustable duty ratio and adjustable power, the duty ratio of the blue laser can be adjusted in the range of 1-100%, and the power can be adjusted in the range of 0.1-300.0W. The blue laser is shaped by the shaping lens (11) After the output, it is coupled into the optical fiber (9) through the coupling focusing lens (13) for output. 4. A kind of high-power semiconductor laser surgical system according to claim 1, is characterized in that: described single-tube coupling module (6) comprises a plurality of single-tube semiconductor lasers (10), and described single-tube semiconductor laser (10 ) is connected with the shaping lens (11), and the shaping lens (11) is connected with the deflection mirror (14) by laser, and the deflection mirror (14) is connected with the coupling focusing lens (13) by laser, and the coupling focusing lens ( 13) It is connected with the optical fiber (9) by laser, and the coupling focusing lens (13) and the optical fiber (9) are packaged in the coupling sleeve housing (15) by means of pressing and fixing or adhesive fixing, and the single tube The blue laser light emitted by the semiconductor laser (10) is output after being shaped by the shaping lens (11), and the multiple blue laser light is converged into a beam of light by the deflection mirror (14) and then output, and coupled into the optical fiber (9) by the coupling focusing lens (13). ), to output. 5. A kind of high-power semiconductor laser surgery system according to claim 2, 3 or 4, characterized in that: said coupling focusing lens (13) comprises a lens group composed of a lens or a plurality of lenses, and the lens is spherical or Aspherical lenses. 6. A high-power semiconductor laser surgery system according to claim 1, characterized in that: said indicating light source (7) can emit indicating laser light for positioning the working position, said indicating laser is a red 635nm laser or a green 532nm laser laser. 7. A high-power semiconductor laser surgical system according to claim 1, characterized in that: the output mode of the front end of the medical laser optical fiber (2) includes straight output along the axis of the optical fiber or side output at a certain angle with the axis of the optical fiber . 8. A kind of high-power semiconductor laser surgery system according to claim 1, characterized in that: said laser cooling system (3) comprises a heat sink (19) and a TEC temperature control device (20), said heat sink ( 19) Located under the single-tube semiconductor laser (10), the heat emitted by the single-tube semiconductor laser (10) is transferred out through the heat sink (19), and the TEC temperature control device (20) is located under the heat sink (19), and the The heat of the heat sink (19) is absorbed and released and discharged by air cooling.