CN101350492A - LD pump high power 2 [mu]m wave lengh medical Tm laser - Google Patents
LD pump high power 2 [mu]m wave lengh medical Tm laser Download PDFInfo
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- CN101350492A CN101350492A CNA2007100583113A CN200710058311A CN101350492A CN 101350492 A CN101350492 A CN 101350492A CN A2007100583113 A CNA2007100583113 A CN A2007100583113A CN 200710058311 A CN200710058311 A CN 200710058311A CN 101350492 A CN101350492 A CN 101350492A
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Abstract
The invention relates to a LD pumping high-power 2Mum wavelength medical Tm LASER, consisting of a LD pumping system, a laser crystal rod, an optical resonant cavity, a water-cooling system, a drying system, a focusing mirror and an optical fiber. The LD pumping system takes GaAlAs semiconductor laser array as a pumping source, comprising 3 groups of LD array modules in total; the laser crystal rod adopts a Tm-doped bonding crystal rod; the optical resonant cavity is a planoconcave cavity; the water cooling system can make the laser crystal rod operate under low temperature; the drying system is a nitrogen-filled drying box in which the complete laser optical path is arranged; the laser is coupled to the optical-fiber output by the focusing mirror. The invention has the advantages that 2Mum wavelength laser can be exported high efficiently, vaporized incision of prostate and other soft tissues can be conducted under water environment efficiently, the operation is rapid, and the manipulation is easy, and damages are avoided; the invention can be extensively applied to the clinic fields of urinary surgery, orthopaedics, gynecopathy, dyspepsia and various minimally invasive operations, etc.. Therefore, the invention is an ideal medical LASER.
Description
(1) technical field
The present invention relates to a kind of Clinical Solid State Laser device, the medical Tm laser of particularly a kind of LD pumped high-power 2 mum wavelengths.
(2) background technology
Laser has a good application prospect in the excision of human body soft tissues such as prostate, and the particularly appearance of high power Ho laser and green laser makes laser obtain using widely in the benign prostate hyperplasia treatment.But with pulse mode work, wavelength is Ho laser formation fissility damage easily when the prostata tissue vaporization is broken of 2.1 μ m, and promptly hemorrhage easily in the surgical procedure, operation is difficult to grasp; The green laser of high power then in the prostate vaporization process, because of the tissue coagulation bleaching reduces excision speed, causes operating time long for bigger prostate lump.
(3) summary of the invention
The objective of the invention is problem at above-mentioned existence, provide a kind of can effectively excise human body soft tissue such as prostate and cause damage little, be convenient to the medical Tm laser of LD pumped high-power 2 mum wavelengths of operation technique again.
Technical scheme of the present invention
The medical Tm laser of a kind of LD pumped high-power 2 mum wavelengths, form by LD pumping system, laser crystal bar, optical resonator, water cooling system, drying system, focus lamp and optical fiber, it is characterized in that: it is pumping source that the LD pumping system adopts the GaAlAs semiconductor laser array, totally 3 groups of LD array modules, 3 groups of LD array modules are 120 degree around laser crystal bar and evenly distribute, pumping laser crystal bar after 3 post lens shaping of laser beam through being complementary with the LD array module; Laser crystal bar adopts mixes Tm bonding crystal bar; Optical resonator is the flat-concave cavity structure, and the resonant cavity total reflective mirror is concave mirror, plating 2013nm be all-trans film, reflectivity R＞98%, and the resonant cavity outgoing mirror is level crossing, plating 2013nm wavelength half anti-film, reflectivity R=70～90%; Water cooling system adopts laser crystal bar and the LD array module mode of temperature control cooling respectively, and laser crystal bar is worked under low-temperature condition; Drying system is that whole laser optical path is placed in the drying box that is filled with nitrogen; 2 mum wavelength laser are coupled to optical fiber output by focus lamp.
The medical Tm laser of a kind of above-mentioned LD pumped high-power 2 mum wavelengths, it is characterized in that: 3 groups of equal emission center wavelength of LD array module are the laser of 785nm.
The medical Tm laser of a kind of above-mentioned LD pumped high-power 2 mum wavelengths, it is characterized in that: laser crystal bar is a Tm:YAG bonding crystal bar.
The medical Tm laser of a kind of above-mentioned LD pumped high-power 2 mum wavelengths is characterized in that: the cooling control temperature of laser crystal bar is＜5 ℃.
The medical Tm laser of a kind of above-mentioned LD pumped high-power 2 mum wavelengths is characterized in that: adopt the transmission of silica fiber or photonic crystal fiber.
Operation principle of the present invention: LD array pumping source emission center wavelength under accurate temperature controlling is the laser of 785nm, laser beam is by even profile pump Tm:YAG laser crystal bar after the shaping of post lens, make this crystal produce the number of ions counter-rotating, form 2 mum wavelength laser generations by the resonant cavity modeling.Because Tm laser is worked in the quasi-three-level mode, cooling system of the present invention is realized temperature control cooling respectively with LD array module and laser crystal, assurance laser laser crystal in the course of the work has lower temperature, improves efficiency of laser, realizes the output of high power 2 mum wavelength laser.Laser light path integral body is in the drying box, guarantees laser crystal dewfall not under the low-temperature working state.
Advantage of the present invention is: this Tm laser can efficiently be exported continuous 2 mum wavelength laser, after low OH Optical Fiber Transmission, optical fiber connector output laser power can reach 70W, can be under water environment to the cutting of vaporizing efficiently of human body soft tissues such as prostate, operative speed is fast, easy and simple to handle, cause damage little, have a good haemostatic effect; 2 mum wavelength laser have in operation that penetration depth is shallow, damage range is little, the operation advantage of high precision, therefore can be widely used in clinical fields such as Urology Surgery, orthopaedics, neurosurgery, gynaecology, department of general surgery, Gastroenterology dept.; Owing to adopt the transmission of silica fiber or photonic crystal fiber,, be a kind of desirable medical laser so can be widely used in various Minimally Invasive Surgeries.
(4) description of drawings
The medical Tm laser structure of accompanying drawing 1:LD pumped high-power 2 mum wavelengths schematic diagram.
The medical Tm laser of accompanying drawing 2:LD pumped high-power 2 mum wavelengths schematic cross-section.
Among the figure: 1-I. resonant cavity total reflective mirror 1-II. resonant cavity outgoing mirror 2. laser crystal bars
3-I.3-II.3-III. post lens 4-I.4-II.4-III.LD array module
5-I. crystal bar cooling device 5-II.LD pumping array cooling device
6. focus lamp 7. optical fiber 8. drying systems
(5) embodiment
Embodiment: see accompanying drawing
The medical Tm laser of a kind of LD pumped high-power 2 mum wavelengths is made up of LD pumping system, laser crystal bar 2, optical resonator, water cooling system 5-I.5-II and drying system 8; It is pumping source that the LD pumping system adopts the GaAlAs semiconductor laser array, totally 3 groups of LD array module 4-I, 4-II, 4-III, 3 groups of LD array module 4-I, 4-II, 4-III are 120 degree around laser crystal bar 2 and evenly distribute, and 3 groups of equal emission center wavelength of LD array module are the laser of 785nm; Pumping laser crystal bar 2 after 3 post lens 3-I, the 3-II of laser beam through being complementary with the LD array module, the 3-III shaping; Laser crystal bar 2 adopts Tm:YAG bonding crystal bar, is of a size of Φ 4 * 80mm, and wherein middle Tm ion doping partial-length is 60mm, and two ends are each 10mm of doped portion length not; Optical resonator is the flat-concave cavity structure, and resonant cavity total reflective mirror 1-I is that be all-trans film, reflectivity R of concave mirror, plating 2013nm is 99.8%, and resonant cavity outgoing mirror 1-II is that level crossing, plating 2013nm wavelength half anti-film, reflectivity R are 80%; Water cooling system adopts laser crystal bar and the LD array module mode of temperature control cooling respectively, 5-I is that crystal bar cooling device, 5-II are LD pumping array cooling device, the cooling control temperature of LD array module is 25 ± 0.5 ℃, the cooling control temperature of laser crystal bar is 1 ± 0.5 ℃, and promptly laser crystal bar is worked under low-temperature condition; Drying system 8 is that whole laser optical path is placed in the drying box that is filled with nitrogen; 2 mum wavelength laser are coupled to silica fiber 7 outputs by focus lamp 6.Clinical practice shows: this Tm laser can be realized the output of 2 mum wavelength continuous lasers efficiently, power output surpasses 70W, by Optical Fiber Transmission can be under water environment to the cutting of vaporizing efficiently of human body soft tissues such as prostate, and operative speed is fast, easy and simple to handle, cause damage little, and clinical application effect is good.
Claims (5)
1. medical Tm laser of LD pumped high-power 2 mum wavelengths, form by LD pumping system, laser crystal bar, optical resonator, water cooling system, drying system, focus lamp and optical fiber, it is characterized in that: it is pumping source that the LD pumping system adopts the GaAlAs semiconductor laser array, totally 3 groups of LD array modules, 3 groups of LD array modules are 120 degree around laser crystal bar and evenly distribute, pumping laser crystal bar after 3 post lens shaping of laser beam through being complementary with the LD array module; Laser crystal bar adopts mixes Tm bonding crystal bar; Optical resonator is the flat-concave cavity structure, and the resonant cavity total reflective mirror is concave mirror, plating 2013nm be all-trans film, reflectivity R＞98%, and the resonant cavity outgoing mirror is level crossing, plating 2013nm wavelength half anti-film, reflectivity R=70～90%; Water cooling system adopts laser crystal bar and the LD array module mode of temperature control cooling respectively, and laser crystal bar is worked under low-temperature condition; Drying system is that whole laser optical path is placed in the drying box that is filled with nitrogen; 2 mum wavelength laser are coupled to optical fiber output by focus lamp.
2. the medical Tm laser of LD pumped high-power 2 mum wavelengths according to claim 1 is characterized in that: 3 groups of equal emission center wavelength of LD array module are the laser of 785nm.
3. the medical Tm laser of LD pumped high-power 2 mum wavelengths according to claim 1 is characterized in that: laser crystal bar is a Tm:YAG bonding crystal bar.
4. the medical Tm laser of LD pumped high-power 2 mum wavelengths according to claim 1 is characterized in that: the cooling control temperature of laser crystal bar is＜5 ℃.
5. the medical Tm laser of LD pumped high-power 2 mum wavelengths according to claim 1 is characterized in that: adopt the transmission of silica fiber or photonic crystal fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100583113A CN101350492A (en) | 2007-07-19 | 2007-07-19 | LD pump high power 2 [mu]m wave lengh medical Tm laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100583113A CN101350492A (en) | 2007-07-19 | 2007-07-19 | LD pump high power 2 [mu]m wave lengh medical Tm laser |
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| CN101350492A true CN101350492A (en) | 2009-01-21 |
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| CNA2007100583113A Pending CN101350492A (en) | 2007-07-19 | 2007-07-19 | LD pump high power 2 [mu]m wave lengh medical Tm laser |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867142A (en) * | 2010-06-09 | 2010-10-20 | 无锡市大华激光设备有限公司 | Protective lens for laser coupling mirror of medical holmium laser therapeutic apparatus |
| CN104795726A (en) * | 2015-05-05 | 2015-07-22 | 中国科学院武汉物理与数学研究所 | Semiconductor laser device capable of being operated below zero DEG C by integral refrigeration |
| CN106943191A (en) * | 2017-04-05 | 2017-07-14 | 中国科学院理化技术研究所 | It is provided simultaneously with 2 mum laser medical treatment devices of internal rubble and soft tissue excision |
| CN110459938A (en) * | 2019-07-23 | 2019-11-15 | 中国电子科技集团公司第十一研究所 | A kind of encapsulation of laser crystal and cooling structure |
| CN111106508A (en) * | 2019-12-19 | 2020-05-05 | 中国兵器装备研究院 | Intracavity pumping mid-infrared pulse laser |
| CN115064930A (en) * | 2022-08-05 | 2022-09-16 | 武汉创鑫激光科技有限公司 | Crystal fiber laser based on cascade pumping |
| WO2022236953A1 (en) * | 2021-05-12 | 2022-11-17 | 张宝刚 | Medical laser with collaborative output of solid-state pulse thulium laser and green laser |
-
2007
- 2007-07-19 CN CNA2007100583113A patent/CN101350492A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867142A (en) * | 2010-06-09 | 2010-10-20 | 无锡市大华激光设备有限公司 | Protective lens for laser coupling mirror of medical holmium laser therapeutic apparatus |
| CN104795726A (en) * | 2015-05-05 | 2015-07-22 | 中国科学院武汉物理与数学研究所 | Semiconductor laser device capable of being operated below zero DEG C by integral refrigeration |
| CN104795726B (en) * | 2015-05-05 | 2018-04-20 | 中国科学院武汉物理与数学研究所 | Integrally cooling can be operated in the semicondcutor laser unit below zero degrees celsius |
| CN106943191A (en) * | 2017-04-05 | 2017-07-14 | 中国科学院理化技术研究所 | It is provided simultaneously with 2 mum laser medical treatment devices of internal rubble and soft tissue excision |
| CN106943191B (en) * | 2017-04-05 | 2023-07-25 | 中国科学院理化技术研究所 | 2-micrometer laser medical device with in-vivo lithotripsy and soft tissue excision |
| CN110459938A (en) * | 2019-07-23 | 2019-11-15 | 中国电子科技集团公司第十一研究所 | A kind of encapsulation of laser crystal and cooling structure |
| CN110459938B (en) * | 2019-07-23 | 2021-07-02 | 中国电子科技集团公司第十一研究所 | Laser crystal packaging and cooling structure |
| CN111106508A (en) * | 2019-12-19 | 2020-05-05 | 中国兵器装备研究院 | Intracavity pumping mid-infrared pulse laser |
| WO2022236953A1 (en) * | 2021-05-12 | 2022-11-17 | 张宝刚 | Medical laser with collaborative output of solid-state pulse thulium laser and green laser |
| CN115064930A (en) * | 2022-08-05 | 2022-09-16 | 武汉创鑫激光科技有限公司 | Crystal fiber laser based on cascade pumping |
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