GB2586364A - Dual-wavelength laser and laser therapeutic apparatus - Google Patents

Dual-wavelength laser and laser therapeutic apparatus Download PDF

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Publication number
GB2586364A
GB2586364A GB2014567.8A GB202014567A GB2586364A GB 2586364 A GB2586364 A GB 2586364A GB 202014567 A GB202014567 A GB 202014567A GB 2586364 A GB2586364 A GB 2586364A
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Prior art keywords
laser
mirror
therapeutic apparatus
wavelength
power supply
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GB2014567.8A
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GB202014567D0 (en
GB2586364B (en
Inventor
Liu Teng
Liu Ming
Liu Puxia
Yuan Zhe
Wang Zhanhui
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Realton Suzhou Medical Tech Co Ltd
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Realton Suzhou Medical Tech Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00022—Sensing or detecting at the treatment site
    • A61B2017/00057—Light
    • A—HUMAN NECESSITIES
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    • A61B2017/00973—Surgical instruments, devices or methods, e.g. tourniquets pedal-operated
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    • A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
    • A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
    • A61B2018/00023—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids closed, i.e. without wound contact by the fluid
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    • A61B2018/00625—Vaporization
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    • A61B2018/00696—Controlled or regulated parameters
    • A61B2018/00702—Power or energy
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    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00773—Sensed parameters
    • A61B2018/00892—Voltage
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00898—Alarms or notifications created in response to an abnormal condition
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B2018/2065—Multiwave; Wavelength mixing, e.g. using four or more wavelengths
    • A61B2018/207—Multiwave; Wavelength mixing, e.g. using four or more wavelengths mixing two wavelengths
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A61B2018/2205—Characteristics of fibres
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A61B2018/2238—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor with means for selectively laterally deflecting the tip of the fibre
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A61B2018/2255—Optical elements at the distal end of probe tips
    • A61B2018/2272—Optical elements at the distal end of probe tips with reflective or refractive surfaces for deflecting the beam

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  • Laser Surgery Devices (AREA)
  • Radiation-Therapy Devices (AREA)
  • Lasers (AREA)

Abstract

Disclosed are a dual-wavelength laser and a laser therapeutic apparatus. The dual-wavelength laser therapeutic apparatus having a simple structure and high stability can switch to output a high-power 532 nm green laser and 1064 nm near-infrared laser by means of a movable reflecting lens (12) shifting between a first position and a second position. The 532 nm green laser is used for vaporizing and removing soft tissue, and the 1064 nm laser is used for cutting soft tissue and for hemostasis of large blood vessels and venous sinuses, thereby meeting surgical requirements and becoming a better solution for soft tissue surgery. A 532 nm laser resonator and a 1064 nm laser resonator share one pump, one Q switch and one back-cavity mirror. By means of a movable reflecting lens, a laser is divided into two lasers so as to switch to respectively output a 532 nm visible laser and a 1064 nm infrared laser.

Description

DESCRIPTION
DUAL-WAVELENGTH LASER AND LASER THERAPEUTIC
APPARATUS
FIELD OF THE INVENTION
[0ool] The invention relates to the field of laser therapeutic instruments, specifically to a dual-wavelength laser and a laser therapeutic apparatus, which are used for the therapeutic of soft tissue diseases and hemostasis, especially the therapeutic of benign prostatic hyperplasia.
BACKGROUND OF THE RELATED ART
[0002] In recent years, the application of laser technology in the medical field has developed rapidly. In the field of soft tissue, laser will soon replace electrosurgical treatment as the gold standard for treatment. Few bleeding, no risk of wound infection, no obturator reaction, etc., these features make laser soft tissue surgery gradually win the competition.
[0003] High-power lasers with a wavelength of 2 um, such as 100W Ho: YAG holmium laser and 120 W Tm: YAG laser, are also competitive in the application of prostatic hyperplasia surgery. It is mainly absorbed by water in the tissue, and the high absorption rate leads to shallow depth of tissue and poor hemostasis. The effect of tissue resection is very strong, but the coagulation and hemostasis are poor, and the fiber must be attached to the tissue, which makes the operation difficult to master. Near-infrared light with a wavelength of 980 nm-1470 nm, the depth of tissue depth is about 7-10 mm, which is beneficial to hemostasis. The patent of the publication patent number CN 102090926 B uses a combination of multiple wavelengths, cutting with a wavelength of 2 um, and using a wavelength of 1470 nm for hemostasis. The technology is complex, difficult to implement, and the system is bulky and difficult to maintain, which is not conducive to the promotion of new technologies.
[0004] The use of green laser for gasification cutting of soft tissue has obtained a lot of clinical practice, which fully proves its safety and effectiveness. Compared with the previous generation "gold standard" "transurethral resection of the prostate" TURP, it has almost no side effects, and it is expected to become a new generation of "gold standard" to replace TURP. Unlike other wavelengths of light, the green laser is mainly absorbed by hemoglobin
DESCRIPTION
in the human body, and can be transmitted over long distances in the water environment of the human body. It directly vaporizes the tissue into powder and flushes it out with water, without the need to crush large pieces of tissue These unique advantages make the wavelength of green laser inevitably the best choice for the treatment of soft tissue diseases However, since there is no cutting effect, pathology cannot be taken, and it is difficult to stop bleeding of large blood vessels and venous sinuses, so dual-wavelength output has become a better choice for the promotion of green laser surgery.
[0005] The patent with a number of US 20180078310A1 describes a combination of a 20 W 532 nm green laser and a 40W 980 nm near-infrared laser. The power of the two wavelengths of this combination is relatively low, and the two lasers are transmitted into the treatment operation fiber through the fiber combining method, the system is complicated, the stability is poor, and it is difficult to maintain.
[0006] Therefore, there is a need for a dual-wavelength laser therapeutic instrument with simple structure and high stability, which can switch the output of high-power 532 nm green laser and 1064 nm near-infrared laser. The 532 nm green laser is used for vaporizing and removing soft tissue, and the 1064 nm laser is used for cutting soft tissue and for hemostasis of large blood vessels and venous sinuses, thereby meeting surgical requirements and becoming a better solution for soft tissue surgery.
SUMMARY OF THE INVENTION
[0007] The technical issue to be solved by the invention is to provide a dual-wavelength laser and a laser therapeutic apparatus [0008] In order to solve the technical issue above, the invention provides dual-wavelength laser, wherein the laser comprises a pumping system, a first half mirror, a movable reflecting lens, a frequency doubling crystal, a total reflecting cavity mirror, an infrared output mirror, a first mirror, a second mirror, a second half minor, and a fiber coupling device; there is a first position and a second position for the movable reflecting lens, when the movable reflecting lens is at the first position, the first wavelength beam generated by the pumping system passes through the infrared output mirror after being reflected by the first half mirror and the movable reflecting lens in turn, and then reaches the fiber coupling device after being
DESCRIPTION
reflected by the first mirror and the second half mirror in turn; when the movable reflecting lens is at the second position, the first wavelength beam generated by the pumping system passes through the frequency doubling crystal after being reflected by the first half mirror and is reflected by the total reflecting cavity mirror to form a second wavelength beam; the second wavelength beam passes through the first half mirror, is reflected by the second mirror, passes through the second half mirror, and reaches the fiber coupling device; the first half mirror and the second half mirror can reflect the first wavelength beam and transmit the second wavelength beam.
[0009] Preferably, the first wavelength beam is an infrared laser with a wavelength of 1064 nm, and the second wavelength beam is a visible laser with a wavelength of 532 nm [0010] Preferably, the pumping system comprises a pump, a Q switch, and a rear mirror. [0011] Preferably, the movable reflecting lens is a slidable device mounted on a sliding block and capable of sliding between the first position and the second position.
[0012] The invention further provides a laser therapeutic apparatus, comprising the laser according to any one of claims 1 to 4, wherein the laser therapeutic apparatus further comprises a power supply control system for supplying power to the laser.
[0013] Preferably, the laser therapeutic apparatus further comprises a laser cooling system for cooling the pump and the Q switch.
[0014] Preferably, the laser cooling system is a water flow cooling system, comprising a water flow protection switch; the water flow protection switch is used to give a signal to feedback to the power supply control system when the water flow is interrupted in the working state of the laser; the power supply control system is used to cut off the power supply of the laser according to the signal fed back by the water flow protection switch. [0015] the laser therapeutic apparatus further comprises a multimode energy transmission fiber; a coupling lens in the fiber coupling device couples the laser energy into the multimode energy transmission fiber; the laser further comprises a temperature sensor for monitoring the temperature of the fiber coupling device; the temperature sensor is used to send a feedback signal to the power supply control system when the temperature of the fiber coupling device exceeds a set value; the power supply control system cuts off the power supply of the laser according to the feedback signal sent by the temperature sensor.
DESCRIPTION
[0016] Preferably, the laser therapeutic apparatus further comprises a power detection device for detecting the real-time power of the laser; the power supply control system is further used to send an alarm when the power measured by the power detection device is lower than or higher than 20% of a specified value.
[0017] Preferably, the laser therapeutic apparatus further comprises a foot switch for switching the output wavelength of the laser; the foot switch comprises two left and right foot control switches that control the output of the first wavelength beam and the second wavelength beam respectively; the foot switch is signally connected to the power supply control system; the power supply control system is used to control the movable reflecting lens to move in the first position or the second position according to the output signal of the foot switch.
[0018] The dual-wavelength laser and the laser therapeutic apparatus of the invention have a simple structure and high stability can switch to output a high-power 532 nm green laser and 1064 nm near-infrared laser by means of a movable reflecting lens shifting between a first position and a second position. The 532 nm green laser is used for vaporizing and removing soft tissue, and the 1064 nm laser is used for cutting soft tissue and for hemostasis of large blood vessels and venous sinuses, thereby meeting surgical requirements and becoming a better solution for soft tissue surgery. A532 nm laser resonator and a 1064 nm laser resonator share one pump, one Q switch and one back-cavity mirror. By means of a movable reflecting lens, a laser is divided into two lasers so as to switch to respectively output a 532 nm visible laser and a 1064 nm infrared laser.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] FIG. 1 is a schematic diagram of the structure of a dual-wavelength laser therapeutic apparatus of the invention; [0020] FIG. 2 is a schematic diagram of the structure of the green laser output of the laser of the invention; [0021] FIG. 3 is a schematic diagram of the structure of the infrared laser output of the laser of the invention; [0022] FIG. 4 is a schematic diagram of the light emitting from the straight of the energy
DESCRIPTION
transmission fiber of the invention; [0023] FIG. 5 is a schematic diagram of the light emitting from the side of the energy transmission fiber of the invention; [0024] In the figures, 1 refers to the laser; 2 refers to the energy transmission fiber; 3 refers to the power supply control system; 4 refers to the laser cooling system; 5 refers to the foot switch; 6 refers to the power detection device; 7 refers to the display device; 8 refers to the rear mirror; 9 refers to the Q switch; 10 refers to the pump; 11 refers to the first half mirror; 12 refers to the movable reflecting lens; 13 refers to the second mirror; 14 refers to the frequency doubling crystal; 15 refers to the total reflecting cavity mirror; 16 refers to the infrared output mirror; 17 refers to the second half mirror; 18 refers to the first mirror; 19 refers to the fiber coupling device; 20 refers to the coupling lens.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0025] The application will be further described hereinafter with reference to the drawings and specific embodiments, so that those skilled in the art can better understand and implement the application, but the examples cited are not intended to limit the application [0026] As shown in FIG. 2 and 3, a dual-wavelength laser 1 of the invention, wherein the laser 1 comprises a pumping system, a first half mirror 11, a movable reflecting lens 12, a frequency doubling crystal 14, a total reflecting cavity mirror 15, an infrared output mirror 16, a first mirror 18, a second mirror 13, a second half mirror 17, and a fiber coupling device 19; there is a first position and a second position for the movable reflecting lens 12.
[0027] As shown in FIG. 3, when the movable reflecting lens 12 is at the first position, the first wavelength beam generated by the pumping system passes through the infrared output mirror 16 after being reflected by the first half mirror 11 and the movable reflecting lens 12 in turn, and then reaches the fiber coupling device 19 after being reflected by the first mirror 18 and the second half mirror 17 in turn.
[0028] As shown in FIG. 2, when the movable reflecting lens 12 is at the second position, the first wavelength beam generated by the pumping system passes through the frequency doubling crystal 14 after being reflected by the first half mirror 11 and is reflected by the total reflecting cavity mirror 15 to form a second wavelength beam; the second wavelength beam
DESCRIPTION
passes through the first half mirror 11, is reflected by the second mirror 13, passes through the second half mirror 17, and reaches the fiber coupling device 19.
[0029] The first half mirror 11 and the second half mirror 17 are coated with a 45-degree 1064 nm high-reflection film and a 532 nm anti-reflection film, which can reflect the first wavelength light beam and transmit the second wavelength light beam. The first wavelength beam is an infrared laser with a wavelength of 1064 nm, and the second wavelength beam is a visible laser with a wavelength of 532 nm. The pumping system comprises a pump 10, a Q switch 9, and a rear mirror 8. The movable reflecting lens 12 is a slidable device mounted on a sliding block and capable of sliding between the first position and the second position. An L-shaped 532 nm laser resonator and a Z-shaped 1064 nm laser resonator share one pump 10, one Q switch 9 and one back-cavity mirror. By means of a movable reflecting lens 12, a laser 1 is divided into two lasers 1 so as to switch to respectively output a 532 nm visible laser and a 1064 nm infrared laser. The first mirror 18 and the second mirror 13 are 45-degree reflecting mirrors.
[0030] The frequency doubling crystal 14 is an LBO crystal or a KTP crystal; the frequency doubling efficiency is controlled by temperature matching, and the temperature control accuracy is ± 0.1 degrees Celsius. The pump 10 is side-pumped, which can be continuous semiconductor pumping or lamp pumping. The laser medium can be Nd:YAG, Nd:YLF or Nd:YV04. The diameter of the crystal rod ranges from 2 mm to 10 mm, and the doping concentration ranges from 0.5% to 1.2%. In order to improve the beam quality, the crystal can be made into two double-concave end faces of 1 m CC or directly use a bonded crystal, where the doping length depends on the distribution length of the pump light.
[0031] The debugging method of the two lasers shares one fiber coupling device 19; in the 532 nm green laser output mode, first adjust the second mirror 13 to adjust the 532 nm laser to the center of the fiber coupling device 19, and then fine-tune the coupling lens 20 of the fiber coupling device 19 to input the 532 nm laser from the center of the fiber; after adjustment, fix and lock the second mirror 13 and the coupling lens 20, switch to the 1064 nm output mode, and then adjust the first mirror 18; adjust the 1064 nm laser into the center of the fiber coupler, and then fine-tune the second mirror 13 to obtain the best 1064 nm laser energy output through the fiber.
DESCRIPTION
[0032] As shown in FIG. I, a laser therapeutic apparatus of the invention, comprising the laser 1, a power supply control system 3 for supplying power to the laser 1, a laser cooling system 4 for cooling the pump 10 and the Q switch 9, a multimode energy transmission fiber 2, a power detection device 6, a foot switch 5, and a display device 7.
[0033] The laser cooling system 4 is a water flow cooling system, comprising a water flow protection switch; the water flow protection switch is used to give a signal to feedback to the power supply control system 3 when the water flow is interrupted in the working state of the laser I. [0034] The power supply control system 3 is used to cut off the power supply of the laser 1 according to the signal fed back by the water flow protection switch. All output power sources are DC power supply, including the ultrasonic drive of the Q switch 9, the DC power supply of the pump 10, the temperature control of the LBO crystal, and the control of the moving lens. The power supply control system 3 also includes signal processing and alarms for each sensor, such as water circuit detection signals, current and voltage real-time monitoring signals, light energy feedback signals, interlocking control signals, and fiber optic sensor temperature signals.
[0035] A coupling lens 20 in the fiber coupling device 19 couples the laser energy into the multimode energy transmission fiber 2; the laser 1 further comprises a temperature sensor for monitoring the temperature of the fiber coupling device 19; the temperature sensor is used to send a feedback signal to the power supply control system 3 when the temperature of the fiber coupling device 19 exceeds a set value; the power supply control system 3 cuts off the power supply of the laser 1 according to the feedback signal sent by the temperature sensor. The multimode energy transmission fiber 2 is composed of a step refractive index multimode quartz energy transmission fiber, with a core diameter of 62.5-1200 um and a cladding diameter of 125-1250 um. During the operation, the laser energy is transmitted to the diseased part of the human body through the fiber for treatment, and the disease is mainly soft tissue disease.
[0036] The power supply control system 3 is further used to send an alarm when the power measured by the power detection device 6 is lower than or higher than 20% of a specified value. The foot switch S comprises two left and right foot control switches that control the
DESCRIPTION
output of the first wavelength beam and the second wavelength beam respectively; the foot switch 5 is signally connected to the power supply control system 3; the power supply control system 3 is used to control the movable reflecting lens 12 to move in the first position or the second position according to the output signal of the foot switch 5.
[0037] As shown in FIG. 4 and 5, the output end of the multimode energy transmission fiber 2 may be directly output along the fiber axis, or may be a lateral output at a certain angle with the fiber axis. When the fiber is directly output, the output end face of the fiber forms an angle of 90 degrees with the axis. When the fiber is output laterally, the output end face of the fiber forms an angle of 45 degrees with the axis.
[0038] In an embodiment, the laser 1 has an output wavelength of 532 nm and 1064 nm, a frequency of 10-15 KHz and CW mode, a pulse width of 100 ns-200 ns, and a maximum average power of 200 W and 120 W, respectively, which is used for the treatment and hemostasis of human soft tissue diseases [0039] The method of using the laser therapeutic apparatus in the application is as follows: [0040] During the operation, the doctor stepped on the foot switch 5, the therapeutic apparatus outputs a laser of one wavelength, and stepped on another foot switch 5, the signal enters the control system, and the control system sends a control signal to move the movable reflecting lens 12 and switch to the laser output of another wavelength. The two lasers are output separately, and the two foot switches 5 cannot be pressed at the same time to output lasers of two wavelengths at the same time. The two exposed control switches are covered with covers to prevent malfunction. The display device 7 is a touchable display. After the therapeutic device is turned on, the surgeon adjusts the control button on the display device 7 to the required power according to the operation needs to perform the operation. The display device 7 simultaneously displays the length of the operation time and the cumulative output laser energy, which is convenient for the doctor to analyze after the operation. When an alarm occurs in the system, the display device 7 displays the details of the alarm information, which is convenient for after-sales feedback and maintenance. During the operation, laser energy is transmitted to the diseased part of the human body through a fiber for treatment, and the disease is mainly soft tissue disease. The output end of the multimode energy transmission fiber 2 may be forward output along the fiber axis, or lateral output at a certain angle with the
DESCRIPTION
fiber axis. The doctor can choose the output mode according to the actual operation situation. [0041] The dual-wavelength laser 1 and the laser therapeutic apparatus of the invention have a simple structure and high stability can switch to output a high-power 532 nm green laser and 1064 nm near-infrared laser by means of a movable reflecting lens 12 shifting between a first position and a second position. The 532 nm green laser is used for vaporizing and removing soft tissue, and the 1064 nm laser is used for cutting soft tissue and for hemostasis of large blood vessels and venous sinuses, thereby meeting surgical requirements and becoming a better solution for soft tissue surgery. A 532 nm laser resonator and a 1064 nm laser resonator share one pump, one Q switch 9 and one back-cavity mirror. By means of a movable reflecting lens 12, a laser 1 is divided into two lasers 1 so as to switch to respectively output a 532 nm visible laser and a 1064 nm infrared laser.
[0042] The above embodiments are only preferred embodiments for fully explaining the application, and the protection scope of the application is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the application shall all fall within the protection scope of this application. The protection scope of the application is subject to the claims.

Claims (10)

  2. I. A dual-wavelength laser, wherein the laser comprises a pumping system, a first half mirror, a movable reflecting lens, a frequency doubling crystal, a total reflecting cavity mirror, an infrared output mirror, a first mirror, a second mirror, a second half mirror, and a fiber coupling device; there is a first position and a second position for the movable reflecting lens; when the movable reflecting lens is at the first position, the first wavelength beam generated by the pumping system passes through the infrared output mirror after being reflected by the first half mirror and the movable reflecting lens in turn, and then reaches the fiber coupling device after being reflected by the first mirror and the second half mirror in turn; when the movable reflecting lens is at the second position, the first wavelength beam generated by the pumping system passes through the frequency doubling crystal after being reflected by the first half mirror and is reflected by the total reflecting cavity mirror to form a second wavelength beam; the second wavelength beam passes through the first half mirror, is reflected by the second mirror, passes through the second half mirror, and reaches the fiber coupling device; the first half mirror and the second half mirror can reflect the first wavelength beam and transmit the second wavelength beam 2. The laser according to claim 1, wherein the first wavelength beam is an infrared laser with a wavelength of 1064 nm, and the second wavelength beam is a visible laser with a wavelength of 532 nm.
  3. 3. The laser according to claim 1, wherein the pumping system comprises a pump, a Q switch, and a rear mirror.
  4. 4. The laser according to claim 1, wherein the movable reflecting lens is a slidable device mounted on a sliding block and capable of sliding between the first position and the second position.
  5. 5. A laser therapeutic apparatus, comprising the laser according to any one of claims 1 to 4, wherein the laser therapeutic apparatus further comprises a power supply control system for supplying power to the laser.
  6. 6. The laser therapeutic apparatus according to claim 5, wherein the laser therapeutic apparatus further comprises a laser cooling system for cooling the pump and the Q switch.
  7. 7. The laser therapeutic apparatus according to claim 6, wherein the laser cooling system is a water flow cooling system, comprising a water flow protection switch; the water flowCLAIMSprotection switch is used to give a signal to feedback to the power supply control system when the water flow is interrupted in the working state of the laser; the power supply control system is used to cut off the power supply of the laser according to the signal fed back by the water flow protection switch.
  8. 8. The laser therapeutic apparatus according to claim 6, wherein the laser therapeutic apparatus further comprises a multimode energy transmission fiber; a coupling lens in the fiber coupling device couples the laser energy into the multimode energy transmission fiber; the laser further comprises a temperature sensor for monitoring the temperature of the fiber coupling device; the temperature sensor is used to send a feedback signal to the power supply control system when the temperature of the fiber coupling device exceeds a set value; the power supply control system cuts off the power supply of the laser according to the feedback signal sent by the temperature sensor.
  9. 9. The laser therapeutic apparatus according to claim 6, wherein the laser therapeutic apparatus further comprises a power detection device for detecting the real-time power of the laser; the power supply control system is further used to send an alarm when the power measured by the power detection device is lower than or higher than 20% of a specified value.
  10. 10. The laser therapeutic apparatus according to claim 6, wherein the laser therapeutic apparatus further comprises a foot switch for switching the output wavelength of the laser; the foot switch comprises two left and right foot control switches that control the output of the first wavelength beam and the second wavelength beam respectively; the foot switch is signally connected to the power supply control system; the power supply control system is used to control the movable reflecting lens to move in the first position or the second position according to the output signal of the foot switch.
GB2014567.8A 2018-07-03 2018-08-06 Dual-wavelength laser and laser therapeutic apparatus Expired - Fee Related GB2586364B (en)

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CN114632268B (en) * 2022-03-18 2023-04-07 温州眼视光国际创新中心 Two-dimensional adjustable optical double-lens holder
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CN109044526B (en) 2024-05-07

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