CN103178435A - High-power high-repetition-frequency pulse laser - Google Patents
High-power high-repetition-frequency pulse laser Download PDFInfo
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- CN103178435A CN103178435A CN2013100627634A CN201310062763A CN103178435A CN 103178435 A CN103178435 A CN 103178435A CN 2013100627634 A CN2013100627634 A CN 2013100627634A CN 201310062763 A CN201310062763 A CN 201310062763A CN 103178435 A CN103178435 A CN 103178435A
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- 239000013078 crystal Substances 0.000 claims abstract description 47
- 230000001360 synchronised effect Effects 0.000 claims abstract description 11
- 230000000306 recurrent effect Effects 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 241000464908 Elliptica Species 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
The invention provides a high-power high-repetition-frequency pulse laser which comprises a light condensing cavity, a resonance cavity, two laser crystal bars and a pulse discharge control system. The high-power high-repetition-frequency pulse laser is characterized in that the light condensing cavity is a metal cavity and comprises a double-oval gold-plated reflector, pulse lamps, a laser crystal bar support structure and a guide tube, the light condensing cavity is of a double-lamp double-oval structure, an oval center O of the double-oval gold-plated reflector is deviated from the pulse lamps and center points C of the laser crystal bars, and a small distance is kept between an intersected point B of double ovals and the laser crystal bars. The resonance cavity of the laser is a double-concave-mirror or plane-mirror symmetric cavity, the two crystal bars are serially connected, and the integral light path is of symmetric U-shaped structure. The pulse discharge control system realizes synchronous or asynchronous discharge of multiple lamps, and the two pulse lamps in the same group in the same light condensing cavity are kept synchronously discharge. Two groups of pulse lamps in different light condensing cavities, synchronous and intermittent discharge can be adjusted, and accordingly, pulse laser high in power, repetition frequency and beam quality is output.
Description
Technical field
The present invention relates to a kind of high power high recurrent frequency pulse laser device, be specially a kind of high repetition Pulse Nd of many lamps of two-rod series connection pumped high-power for Laser cutting: the YAG laser belongs to the Laser Devices technical field.
Background technology
High power laser light has huge advantage and is widely used at the Metal Cutting manufacture field.The laser that is used at present cutting processing mainly contains high power fiber laser, high-power CO
2Laser and lamp pumping pulse solid state laser.Two kinds of lasers of pulsed solid stale laser and other are compared, the advantage that is used for cutting processing shows that its Laser output is impulse form, and pulse laser has very high peak power, in the same average power situation, other want large many Thickness Ratio of cutting metal plate, and cutting power is strong.The lamp pumping pulse solid state laser that is used at present cutting mostly is the excellent solid state laser of double lamp pumped list, is limited to the restriction of emittance and the discharge frequency of flashlight, and laser output power is generally less than 600W, and repetition rate is less than 200Hz.Simultaneously because single laser crystal can not be accomplished effective thermal effect compensation, laser beam quality is poor, and this has limited pulsed solid stale laser greatly in the performance of cutting processing field advantage.Chinese invention patent " double lamp pumped great-power solid laser of serially connected rods " (application number: 01142319.6) disclosed pulse laser, adopt two-rod series connection, the pumping perpendicular direction improves laser power, Shortcomings still aspect pulse frequency and efficient.
In sum, high power high recurrent frequency pulse laser device has the advantage of oneself in the Metal Cutting field, above-mentioned disclosed patent has only proposed to put forward high-power method, still has larger shortcoming aspect pulse frequency and lasing efficiency, can not satisfy the demand of industrial processes development.
Summary of the invention
The object of the invention is exactly for the described problem of background technology, discloses the high repetition Pulse Nd of a kind of high power: the YAG laser.This laser is realized the pulse laser output of high power, high repetition, high light beam quality by the pumping of many lamps of two-rod series connection.
The technical solution adopted in the present invention is: a kind of high power high recurrent frequency pulse laser device, comprise laser pump cavity, resonant cavity, laser crystal bar, pulsed discharge control system, and it is characterized in that:
Described laser pump cavity is wire chamber, the supporting construction and the mozzle that comprise the gold-plated reflector of bielliptic(al), flashlight and laser crystal bar, laser pump cavity is two lamp bielliptic(al) structures, two flashlights are from laser crystal bar of two side pumpings, the elliptical center O of the gold-plated reflector of bielliptic(al) and flashlight and laser crystal bar central point C depart from 1mm are set, and bielliptic(al) joining B and laser crystal bar distance are controlled in 3mm;
Described laser crystal bar is the Nd:YAG crystal bar, and laser crystal bar is arranged in the mozzle of laser pump cavity center, and laser crystal bar directly is not connected by the crystal bar sleeve with supporting construction;
Described resonant cavity is made of total reflective mirror, outgoing mirror and two groups of catadioptric mirrors, and total reflective mirror and outgoing mirror are symmetrical concave mirror or level crossing, and the resonant cavity light path is symmetrical expression U-shaped structure; Whole laser structure is double laser crystal rod serial connection, four flashlight pumpings, minute two groups and laser pump cavity composition module;
The pulsed discharge control system is used for controlling the synchronous or asynchronous discharge of many lamps: two flashlight maintenance synchronous discharges on the same group in same laser pump cavity; Two group pulse lamps of different laser pump cavities are realized synchronously and the interval is discharged adjustable.
High power high recurrent frequency pulse laser device as above is characterized in that, total reflective mirror plating 1064nm wavelength reflectance coating, outgoing mirror plating part reflectance coating, total reflective mirror reflectivity R〉99.5%, outgoing mirror transmitance T=20～40%; Two groups of catadioptric mirror plating 1064nm wavelength reflectance coatings.
High power high recurrent frequency pulse laser device as above is characterized in that the laser crystal bar specification is Ф 8 * 175mm.
The invention has the beneficial effects as follows:
1. laser pump cavity elliptical reflecting body adopts flashlight and crystal bar misalignment elliptical center structural design, bielliptic(al) intersection point and laser crystal distance are little, the laser pump cavity compact conformation, radiant light is few and have higher coupling efficiency to the radiation of another symmetrical area elliptica, and the laser whole efficiency is improved.
2. control control system by pulsed discharge, realize flashlight synchronous discharge on the same group, two group pulse lamps are synchronous and the interval discharge is adjustable, realized that namely the output of laser pulse macro-energy has realized again the output of laser high repetition frequency, has strengthened working ability and the range of work of laser greatly.
3. resonant cavity adopts symmetrical expression U-shaped structure, cavity length is dwindled over half, has improved the stability of laser operation and the convenience of application.
4. adopt the two-rod series connection mode, by the resonant cavity optimal design, the thermal effect of two crystal bars can compensate greatly mutually, greatly improves laser beam quality.
In sum, can guarantee Pulse Nd by inventing disclosed technical scheme: the YAG laser is realized the stabilized lasers output of the high repetition high light beam quality of high power.
Description of drawings
Fig. 1 is the structural representation of high power high recurrent frequency pulse laser device of the present invention;
Fig. 2 is the laser pump cavity structural representation of high power high recurrent frequency pulse laser device of the present invention;
Fig. 3 is the laser pump cavity structural section schematic diagram of high power high recurrent frequency pulse laser device of the present invention.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
Symbol description in accompanying drawing: 1-total reflective mirror, 21,22,23,24-flashlight (4), 31,32-Nd:YAG crystal bar (two), 41,42-catadioptric mirror (two groups), 5-pulsed discharge control system, 6-outgoing mirror, the gold-plated reflector of 7-bielliptic(al), 8-mozzle, 9-supporting construction.
As shown in Fig. 1～2, high power high recurrent frequency pulse laser device of the present invention comprises laser pump cavity, resonant cavity, laser crystal bar, the several parts of pulsed discharge control system.Laser pump cavity is wire chamber, comprise the gold-plated reflector 7 of bielliptic(al), mozzle 8 and supporting construction 9, as shown in Figure 3, two elliptical center point O that intersect and flashlight and crystal bar central point C depart from 1mm are set, pass through simulative optimization, bielliptic(al) joining B and laser crystal bar keep less distance (in 3mm), and it is few and have a higher coupling efficiency that flashlight is radiated the radiation of another symmetrical area elliptica.
Resonant cavity is made of total reflective mirror 1, two groups of catadioptric mirrors 41 and 42, outgoing mirror 6, wherein total reflective mirror 1 and outgoing mirror 6 are symmetrical concave mirror or level crossing, plate respectively 1064nm wavelength reflectance coating and part reflectance coating, total reflective mirror 1 reflectivity R〉99.5%, outgoing mirror 6 transmitance T=20～40%, catadioptric mirror 41 and 42 plating 1064nm wavelength reflectance coatings.The resonant cavity light path is symmetrical expression U-shaped structure, makes the resonant cavity overall length be no more than 600mm, has improved the stability of laser operation and the convenience of application.
Nd:YAG laser crystal bar 31,32, specification are Ф 8 * 175mm, directly are not connected by the crystal bar sleeve with supporting construction 9, and structural stability is good, and cooling water flow is unimpeded.
The flashlight on the same group 21,22 or 23,24 that pulsed discharge control system 5 is controlled in same laser pump cavity keeps synchronous discharge, guaranteed the uniformity of pumping, two group pulse lamps of different laser pump cavities, realize synchronous and the interval is discharged adjustable, enlarge pulsed laser output energy and frequency range, the pulsed laser energy maximum can reach 8J, and frequency reaches as high as 600Hz.
Operation principle of the present invention is: when the flashlight of described solid state laser discharges, radiant light is coupled to the pumping that realizes laser on laser crystal bar by oval laser pump cavity, the laser pump cavity oval structure is designed to elliptical center and flashlight and the setting of crystal bar misalignment, the bielliptic(al) intersection point is little apart from the laser crystal bar distance, by the board design compact conformation, radius is difficult for going to a symmetrical side, has a high radiation that is radiated another symmetrical area elliptica of high coupling efficiency few and have higher coupling efficiency.Produce gain by the laser crystal bar under the high-velocity flow cooling condition of mozzle under the pulse pump effect, realize laser generation in resonant cavity, laser output pulse laser.Laser is the symmetrical structure of two-rod series connection, realizes that by the resonant cavity optimal design thermal effect of two crystal compensates mutually, realizes the high light beam quality Laser output.When the control of pulsed discharge control system realized two groups of lamp synchronous discharges, two laser crystal bars provided gain simultaneously, and laser produces huge energy pulse output; When two groups of lamp interval discharges, can realize the high Repetition Frequency Laser output of doubling frequency.When discharge in the interval, two laser crystal pump powers and frequency are identical, are only to stagger the time, and under the high-frequency impulse discharging condition, because thermal relaxation forms the Continuous Heat characteristic slowly, two crystal thermal effect are still identical, and the high light beam quality output of interval pulse is achieved.
The content that is not described in detail in this specification belongs to the known prior art of this area professional and technical personnel.
Claims (3)
1. a high power high recurrent frequency pulse laser device, comprise laser pump cavity, resonant cavity, laser crystal bar, pulsed discharge control system, it is characterized in that:
Described laser pump cavity is wire chamber, the supporting construction and the mozzle that comprise the gold-plated reflector of bielliptic(al), flashlight and laser crystal bar, laser pump cavity is two lamp bielliptic(al) structures, two flashlights are from laser crystal bar of two side pumpings, the elliptical center O of the gold-plated reflector of bielliptic(al) and flashlight and laser crystal bar central point C depart from 1mm are set, and bielliptic(al) joining B and laser crystal bar distance are controlled in 3mm;
Described laser crystal bar is the Nd:YAG crystal bar, and laser crystal bar is arranged in the mozzle of laser pump cavity center, and laser crystal bar directly is not connected by the crystal bar sleeve with supporting construction;
Described resonant cavity is made of total reflective mirror, outgoing mirror and two groups of catadioptric mirrors, and total reflective mirror and outgoing mirror are symmetrical concave mirror or level crossing, and the resonant cavity light path is symmetrical expression U-shaped structure; Whole laser structure is double laser crystal rod serial connection, four flashlight pumpings, minute two groups and laser pump cavity composition module;
The pulsed discharge control system is used for controlling the synchronous or asynchronous discharge of many lamps: two flashlight maintenance synchronous discharges on the same group in same laser pump cavity; Two group pulse lamps of different laser pump cavities are realized synchronously and the interval is discharged adjustable.
2. high power high recurrent frequency pulse laser device according to claim 1, is characterized in that, total reflective mirror plating 1064nm wavelength reflectance coating, outgoing mirror plating part reflectance coating, total reflective mirror reflectivity R〉99.5%, outgoing mirror transmitance T=20～40%; Two groups of catadioptric mirror plating 1064nm wavelength reflectance coatings.
3. high power high recurrent frequency pulse laser device according to claim 1, is characterized in that, the laser crystal bar specification is Ф 8 * 175mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310062763.4A CN103178435B (en) | 2013-02-28 | 2013-02-28 | High-power high-repetition-frequency pulse laser |
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| CN201310062763.4A CN103178435B (en) | 2013-02-28 | 2013-02-28 | High-power high-repetition-frequency pulse laser |
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| CN103178435A true CN103178435A (en) | 2013-06-26 |
| CN103178435B CN103178435B (en) | 2015-02-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233164A (en) * | 2018-02-10 | 2018-06-29 | 中国医学科学院生物医学工程研究所 | A kind of novel erbium laser |
| CN109256665A (en) * | 2018-09-30 | 2019-01-22 | 沈阳理工大学 | A kind of efficient local oscillator-two-stage amplification laser pump cavity |
| CN109260604A (en) * | 2018-12-05 | 2019-01-25 | 深圳市吉斯迪科技有限公司 | A kind of portable electro-optical Q-switch laser skin therapeutic equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1249906A (en) * | 1968-06-10 | 1971-10-13 | Comp Generale Electricite | A laser |
| JPS6095986A (en) * | 1983-10-31 | 1985-05-29 | Mitsubishi Electric Corp | Discharge tube excitation laser device |
| JPS61212078A (en) * | 1985-03-18 | 1986-09-20 | Toshiba Corp | Slab-type laser device |
| JPH02281776A (en) * | 1989-04-24 | 1990-11-19 | Hamamatsu Photonics Kk | Laser device |
| RU2186445C2 (en) * | 2000-05-17 | 2002-07-27 | Открытое акционерное общество АК "Туламашзавод" | Method and laser for pumping active element of laser |
| CN101626137A (en) * | 2008-07-11 | 2010-01-13 | 武汉楚天激光（集团）股份有限公司 | Double-rod double-lamp double-cavity light focusing cavity |
| CN101841121A (en) * | 2010-05-07 | 2010-09-22 | 华中科技大学 | Light focusing cavity of laser |
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2013
- 2013-02-28 CN CN201310062763.4A patent/CN103178435B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1249906A (en) * | 1968-06-10 | 1971-10-13 | Comp Generale Electricite | A laser |
| JPS6095986A (en) * | 1983-10-31 | 1985-05-29 | Mitsubishi Electric Corp | Discharge tube excitation laser device |
| JPS61212078A (en) * | 1985-03-18 | 1986-09-20 | Toshiba Corp | Slab-type laser device |
| JPH02281776A (en) * | 1989-04-24 | 1990-11-19 | Hamamatsu Photonics Kk | Laser device |
| RU2186445C2 (en) * | 2000-05-17 | 2002-07-27 | Открытое акционерное общество АК "Туламашзавод" | Method and laser for pumping active element of laser |
| CN101626137A (en) * | 2008-07-11 | 2010-01-13 | 武汉楚天激光（集团）股份有限公司 | Double-rod double-lamp double-cavity light focusing cavity |
| CN101841121A (en) * | 2010-05-07 | 2010-09-22 | 华中科技大学 | Light focusing cavity of laser |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233164A (en) * | 2018-02-10 | 2018-06-29 | 中国医学科学院生物医学工程研究所 | A kind of novel erbium laser |
| CN109256665A (en) * | 2018-09-30 | 2019-01-22 | 沈阳理工大学 | A kind of efficient local oscillator-two-stage amplification laser pump cavity |
| CN109260604A (en) * | 2018-12-05 | 2019-01-25 | 深圳市吉斯迪科技有限公司 | A kind of portable electro-optical Q-switch laser skin therapeutic equipment |
| CN109260604B (en) * | 2018-12-05 | 2024-03-15 | 深圳市吉斯迪科技有限公司 | Portable electro-optic Q-switched laser skin therapeutic instrument |
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Inventor after: Yao Yucheng Inventor after: Xu Shaogang Inventor after: Huang Chuyun Inventor after: Xu Guowang Inventor after: Yang Tao Inventor before: Yao Yucheng Inventor before: Huang Chuyun Inventor before: Xu Guowang Inventor before: Yang Tao Inventor before: Xu Shaogang |
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Free format text: CORRECT: INVENTOR; FROM: YAO YUCHENG HUANG CHUYUN XU GUOWANG YANG TAO XU SHAOGANG TO: YAO YUCHENG XU SHAOGANG HUANG CHUYUN XU GUOWANG YANG TAO |
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Effective date of registration: 20150105 Address after: 430068 Wuchang, Hubei Province, South Lake, Li Jia Dun special No. 1 Applicant after: Hubei Industry University Applicant after: WUXI TAIFU PHOTOELECTRIC TECHNOLOGY CO., LTD. Address before: 430068 Wuchang, Hubei Province, South Lake, Li Jia Dun special No. 1 Applicant before: Hubei Industry University |
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