CN103036132A - Laser head device with multiple groups of discharge gain units circumferentially distributed - Google Patents
Laser head device with multiple groups of discharge gain units circumferentially distributed Download PDFInfo
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- CN103036132A CN103036132A CN2012105364132A CN201210536413A CN103036132A CN 103036132 A CN103036132 A CN 103036132A CN 2012105364132 A CN2012105364132 A CN 2012105364132A CN 201210536413 A CN201210536413 A CN 201210536413A CN 103036132 A CN103036132 A CN 103036132A
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Abstract
The invention discloses a laser head device with multiple groups of discharge gain units circumferentially distributed, and relates to the technical field of a high-power gas laser device. The laser head device with the multiple groups of discharge gain units circumferentially distributed solves the problem that average power and a repetition frequency of an existing laser device hardly can be improved due to restrictions of technology and devices of the existing laser device. The laser head device comprises the multiple groups of discharge gain units which are evenly distributed on the same circumference with a common axis as a standard; drought fans, heat exchangers and guiding devices are arranged between the discharge gain units to form an annular gas cycle flow field; one end, in the length direction, of each group of discharge gain units is vertically provided with a concave spherical surface total reflection lens; the other end of each group of discharge gain units is slantly provided with a first planer total reflection les; a second planar surface total reflection les is slantly arranged on the common axis; one side, along the transmission direction of lasers, of the common axis is vertically provided with a laser output window. Average power and repetition frequency of lasers output by the laser head device can achieve the same multiple as the number of the discharge gain units and are greatly improved.
Description
Technical field
The present invention relates to the high power gas laser technical field, be specifically related to the laser head structure of High Power Pulse TEA gas laser.
Background technology
The High Power Pulse TEA gas laser adopts repetition pulse discharge excitation working form, and discharge pulse width extremely narrow (hundred nanosecond orders) consists of the discharge gain unit by group leader's electrode pair and necessary preionization device.The optical resonator that makes laser generation amplify output adopts flat-recessed stable cavity.Be to realize the high repetition frequency running, obtain high-average power, require working gas to circulate, also need because of discharge and circulate the working gas that work done elevates the temperature and implement cooling.Therefore in laser head structure, except the discharge gain unit and optical resonator that are necessary, also need to have the heat exchanger of blower fan, guiding device and cooling that working gas is circulated.
The High Power Pulse TEA gas laser is only installed one group of discharge gain unit, and laser head cross-sectional structure layout is in conjunction with Fig. 1, by one group of discharge gain unit, one group of blower fan, two groups of heat exchangers and corresponding guiding device looping gas circulation flow field.Shown in the A-A cutaway view (flat-recessed stable cavity version) that Fig. 2 is Fig. 1, end at discharge gain unit length direction vertically arranges a concave spherical surface total reflection eyeglass, at the other end planar section reflecting optics is set vertically, this partially reflecting mirror sheet namely is laser output window.Export through optical resonance cavity oscillations amplification and by laser output window in the laser gain that the discharge gain unit produces.At present, because of the restriction of correlation technique and device, the average power of pulse TEA gas laser and repetition rate all are difficult to obtain larger raising.
Summary of the invention
The present invention is for solving existing laser owing to being subject to the restriction of technology and device, be difficult to realize the average power of laser and the problem that repetition rate improves, provide a kind of circumferential distribution to organize the laser head assembly of discharge gain unit more, laser average power and repetition rate are greatly improved.
The laser head assemblies of organizing the discharge gain units circumferentially distribute more, this device comprises many group discharge gain units, described many group discharge gain units are take a common axis as benchmark, on same circumference, evenly distribute, and be provided with blower fan, heat exchanger and guiding device between many group discharge gain units, described many group discharge gain units, blower fan, heat exchanger and guiding device looping gas circulation flow field; One end of the length direction of each group discharge gain unit vertically arranges concave spherical surface total reflection eyeglass, the other end is obliquely installed the first plane total reflection eyeglass, described the first plane total reflection eyeglass makes the direction of turning back from every group of laser beam of transferring out of discharge gain unit to inside circumference, and the laser beam optical axis is crossing with common axis; Tilt in common axis the second plane reflection eyeglass is set, side along the laser beam transmission direction on described common axis vertically arranges laser output window, when the second plane total reflection eyeglass and one group of discharge gain unit wherein tilt the first plane total reflection eyeglass of arranging when being in correspondence position, form the plano-concave stable cavity structure that light path communicates between concave spherical surface total reflection eyeglass and the laser output window.
Operation principle of the present invention: during laser works, each discharge gain unit with identical repetition rate, identical blanking time along the pulsed discharge of a certain circumferencial direction circular order, equal the inverse of repetition rate and set discharge gain unit quantity product blanking time.With common axis tilt the plane total reflection eyeglass that arranges and a certain discharge gain unit tilt the plane total reflection eyeglass that arranges when being in correspondence position as the start position of working, when common axis tilts the pulsed discharge of the revolution of the plane total reflection eyeglass that arranges and the discharge gain unit corresponding with it when starting synchronously, and the tilt rotating speed of the plane total reflection eyeglass that arranges of common axis is equal to the repetition rate numerical value of the gain unit that discharges, gyratory directions is equal to the loop direction of sequence discharge between the discharge gain unit, such result will occur: common axis the tilt plane completely reflecting mirror of setting of the plane total reflection eyeglass that arranges and a certain discharge gain unit that tilts is in moment of correspondence position, just be the moment of this discharge gain unit pulsed discharge, the laser gain of generation can form that light path communicates flat-recessed stable cavity structure in vibration amplify and export from laser output window.Therefore, compare with former the laser head that one group of discharge gain unit is set, the present invention circumferentially distributes organizes the laser head structure devices of discharge gain units more, its Laser output average power and repetition rate, can reach the multiple with the identical numerical value of quantity of the discharge gain unit that arranges, be greatly enhanced.
Description of drawings
Fig. 1 is the structural representation of existing discharge gain unit cross section;
Fig. 2 is the A-A profile of Fig. 1, is plano-concave stable cavity structural representation.
Fig. 3 is the circumferentially cross sectional representation of the laser head assembly of the many group discharges of distribution gain units of the present invention;
Fig. 4 is the A-A profile of Fig. 3, is when the second plane total reflection eyeglass and the first plane total reflection eyeglass are in correspondence position, the plano-concave stable cavity structure that forms between concave spherical surface total reflection eyeglass and laser output window.
Among the figure: 1, blower fan, 2, heat exchanger, 3, the discharge gain unit, 4, guiding device, 5, laser output window, 6, concave spherical surface total reflection eyeglass, the 7, first plane total reflection eyeglass, the 8, second plane total reflection eyeglass, 9, device for revolving and driving.
Embodiment
Embodiment one, in conjunction with Fig. 3 and Fig. 4 present embodiment is described, the laser head assemblies of organizing the discharge gain units circumferentially distribute more, comprise that the discharge gain unit 3 of many group (more than one group) same structure parameters take a common axis as benchmark, evenly distributes on same circumference; Between discharge gain unit 3, be provided with blower fan 1, heat exchanger 2 and guiding device 4, looping gas circulation flow field; End at each group discharge gain unit 3 length direction all vertically arranges an identical concave spherical surface total reflection eyeglass 6, all be obliquely installed first an identical plane total reflection eyeglass 7 at the other end, this the first plane total reflection eyeglass 7 makes the direction of turning back from the laser beam that transfers out of discharge gain unit 3 to inside circumference, and the laser beam optical axis is crossing with common axis; Tilting in common axis arranges the second plane total reflection eyeglass 8, the second plane total reflection eyeglasses 8 and is installed on the gyroaxis of a device for revolving and driving 9, and the axis of rotation of this device for revolving and driving 9 overlaps with common axis; When the second plane total reflection eyeglass 8 turns round along common axis, the tilt minute surface of the first plane total reflection eyeglass 7 of arranging of its minute surface and each discharge gain unit 3 all exists identical correspondence position relation, on this correspondence position, can receive the laser beam that transmits from the first plane total reflection eyeglass 7 corresponding with it, and can make the laser beam direction of turning back coaxial and export to a side with common axis; Side along the laser transmission direction on common axis vertically arranges a planar section reflecting optics, and this planar section reflecting optics namely is laser output window 5; When tilt the second plane total reflection eyeglass 8 of arranging and a certain discharge gain unit 3 of common axis tilts the first plane total reflection eyeglass 7 of arranging when being in correspondence position, can form between vertically disposed concave spherical surface total reflection eyeglass 6 on this discharge gain unit 3 and laser output window 5 that light path communicates flat-recessed stable cavity structure, this discharge gain unit is amplified because of the laser gain vibration of Pulsed Discharge and export from laser output window 5.
Can comprise multi-group heat exchanger in the present embodiment, described multi-group heat exchanger 2 is disposed on the circumference with many group discharge gain units 3.
Embodiment two, in conjunction with Fig. 3 and Fig. 4 present embodiment is described, present embodiment is the embodiment of laser head assembly that the discharge gain unit is organized in embodiment one described circumferential distribution more: present embodiment is take the laser head structure of the discharge gain unit of three groups of same structure parameters of circumferential distribution as example: comprise blower fan 1, two groups of heat exchangers 2, three groups of discharge gain units 3, six guiding devices 4, laser output window 5, three concave spherical surface total reflection eyeglasses 6, three the first plane total reflection eyeglass 7, the second plane total reflection eyeglass 8 and device for revolving and driving 9; The discharge gain unit 3 of described three groups of same structure parameters evenly distributes on same circumference take a common axis as benchmark; Blower fan 1, two groups of heat exchangers 2 are arranged on and respectively discharge between the gain unit 3, all are provided with guiding device 4, looping gas circulation flow field between discharge gain unit 3, blower fan 1, the heat exchanger 2; End (being right-hand member among Fig. 4) at each group discharge gain unit 3 length direction all vertically arranges an identical concave spherical surface total reflection eyeglass 6, all be obliquely installed first an identical plane total reflection eyeglass 7 at the other end (being left end among Fig. 4), three plane total reflection eyeglasses 7 also are evenly to distribute on discharge gain unit 3 residing same circumference, each piece first plane total reflection eyeglass 7 can both make laser beam that the discharge gain unit 3 of its correspondence transfers out to the inside circumference direction of turning back, and laser beam optical axis and common axis intersect; Tilting in common axis arranges the second plane total reflection eyeglass 8, the second plane total reflection eyeglasses 8 and is installed on the gyroaxis of device for revolving and driving 9, and the axis of device for revolving and driving 9 gyroaxises overlaps with common axis; When the second plane total reflection eyeglass 8 returns when circling around common axis, its minute surface identical correspondence position relation all can occur once with the minute surface of three the first plane total reflection eyeglasses 7, the second plane total reflection eyeglass 8 can receive the laser beam of turning back from the first plane total reflection eyeglass 7 corresponding with it on this correspondence position, and makes the laser beam direction of turning back coaxial and to side output (being to the left among Fig. 4) with common axis; Side (being to the left among Fig. 4) along the laser transmission direction on common axis vertically arranges a laser output window 5; When the second plane total reflection eyeglass 8 and a certain discharge gain unit 3 tilt the first plane total reflection eyeglass 7 of arranging when being in correspondence position, just form between concave spherical surface total reflection eyeglass 6 that this discharge gain unit 3 arranges and laser output window 5 that light path communicates flat-recessed stable cavity structure, this discharge gain unit 3 is exported because of the laser gain vibration amplification of Pulsed Discharge and from laser output window 5.
Adopt the described circumferential distribution of present embodiment to organize the laser of laser head assembly of discharge gain unit when work more, the discharge repetition rate of three groups of discharge gain units 3 is identical, take 100Hz as example, identical time of interval and along a certain circumferencial direction round sequential discharge all between them, in conjunction with Fig. 3, be example in a clockwise direction, equal the inverse of repetition rate and discharge gain unit 3 magnitude setting products blanking time, be to be blanking time 1/300 second, when being in correspondence position with the second plane total reflection eyeglass 8 with certain first plane total reflection eyeglass 7, as the work start position, the discharge gain unit 3 of corresponding top side is as example in Fig. 3, when the revolution of the second plane total reflection eyeglass 8 starts and discharge gain unit 3 discharges corresponding with it start when synchronous, and the rotating speed of the second plane total reflection eyeglass 8 is equal to the repetition rate numerical value of the gain unit 3 that discharges, that is: 100 revolutions per seconds (returning the 1/100 second time of circling), gyratory directions is equal to the loop direction of the sequence discharge between the gain unit 3 of respectively discharging, Figure 3 shows that clockwise direction, then the second plane total reflection eyeglass 8 from starting point be turned back to lower right side discharge gain unit 3 on time of the first plane total reflection eyeglass 7 correspondence positions be 1/300 second, being turned back to the time of being sidelong the first plane total reflection eyeglass 7 correspondence positions on the electric gain unit 3 with the lower-left is 2/300 second, be turned back to top side discharge gain unit 3 on time (namely returning the time of circling) of the first plane total reflection eyeglass 7 correspondence positions be 3/300 second (namely 1/100 second).As seen to be in the time interval of correspondence position be 1/300 second to the second plane total reflection eyeglass 8 and three the first plane total reflection eyeglass 7 orders, and 1/300 second blanking time of sequence discharge is identical between three groups of discharge gain units 3, the the first plane total reflection eyeglass 7 that then arranges on the second plane total reflection eyeglass 8 and a certain discharge gain unit 3 is in the moment of correspondence position, just be the moment of these discharge gain unit 3 discharges, the laser gain of generation can vibration be amplified and export from laser output window 5 in the plano-concave stable cavity structure that the formation light path communicates.Therefore, the laser head structure device of the circumferential three groups of discharge gain units 3 that distribute, in conjunction with Fig. 3, compare with the laser head that one group of discharge gain unit 3 only is set among Fig. 1, repetition rate is that 300Hz is original 3 times, and the Laser output average power is that three groups of discharge gain unit output sums also are original 3 times.Then can illustrate, for former the laser head that one group of discharge gain unit 3 is set, the laser head assembly of discharge gain unit is organized in the described circumferential distribution of present embodiment more, its Laser output average power and repetition rate can reach the multiple with the identical numerical value of quantity of set discharge gain unit.
Claims (2)
1. the laser head assemblies of organizing the discharge gain units circumferentially distribute more, it is characterized in that, this device comprises many group discharge gain units (3), described many group discharge gain units (3) are take a common axis as benchmark, on same circumference, evenly distribute, and be provided with blower fan (1), heat exchanger (2) and guiding device (4) between many group discharge gain units (3), described many group discharge gain units (3), blower fan (1), heat exchanger (2) and guiding device (5) looping gas circulation flow field; One end of the length direction of each group discharge gain unit (3) vertically arranges concave spherical surface total reflection eyeglass (6), the other end is obliquely installed the first plane total reflection eyeglass (7), described the first plane total reflection eyeglass (7) makes the direction of turning back from the laser beam that transfers out of every group of discharge gain unit (3) to inside circumference, and the laser beam optical axis is crossing with common axis; Tilt in common axis the second plane reflection eyeglass (8) is set, side along the laser beam transmission direction on described common axis vertically arranges laser output window (5), when the second plane total reflection eyeglass 8 and one group of discharge gain unit (3) wherein tilt the first plane total reflection eyeglass (7) of arranging when being in correspondence position, the plano-concave stable cavity structure that the formation light path communicates between concave spherical surface total reflection eyeglass (6) and the laser output window (5).
2. the laser head assembly of discharge gain unit is organized in circumferential distribution according to claim 1 more, it is characterized in that, also comprise device for revolving and driving (9), described the second plane total reflection eyeglass (8) is installed on the gyroaxis of device for revolving and driving (9), and the axis of rotation of described device for revolving and driving (9) overlaps with common axis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105364132A CN103036132A (en) | 2012-12-12 | 2012-12-12 | Laser head device with multiple groups of discharge gain units circumferentially distributed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105364132A CN103036132A (en) | 2012-12-12 | 2012-12-12 | Laser head device with multiple groups of discharge gain units circumferentially distributed |
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| CN103036132A true CN103036132A (en) | 2013-04-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453199A (en) * | 2017-07-31 | 2017-12-08 | 中国科学院长春光学精密机械与物理研究所 | A kind of repetition rate giant-pulse gas laser laser head |
| CN114204386A (en) * | 2020-09-18 | 2022-03-18 | 中国科学院空天信息创新研究院 | Raising transverse excitation atmospheric pressure CO2Device and method for laser repetition frequency |
Citations (5)
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| JPS6392073A (en) * | 1986-10-07 | 1988-04-22 | Toshiba Corp | Gas laser equipment |
| CN1119357A (en) * | 1994-09-21 | 1996-03-27 | 中国科学院电子学研究所 | High-repeat frequency rate high-average power laser |
| US20020044586A1 (en) * | 1999-12-10 | 2002-04-18 | Myers David W. | Very narrow band, two chamber, high rep rate gas discharge laser system |
| CN101222111A (en) * | 2007-12-11 | 2008-07-16 | 中国科学院长春光学精密机械与物理研究所 | Ring-shaped channel type laser cavity |
| CN101807772A (en) * | 2010-04-12 | 2010-08-18 | 中国科学院长春光学精密机械与物理研究所 | Ring-shaped resonant laser cavity of high-power TEA (triethylamine) gas laser |
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2012
- 2012-12-12 CN CN2012105364132A patent/CN103036132A/en active Pending
Patent Citations (5)
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| JPS6392073A (en) * | 1986-10-07 | 1988-04-22 | Toshiba Corp | Gas laser equipment |
| CN1119357A (en) * | 1994-09-21 | 1996-03-27 | 中国科学院电子学研究所 | High-repeat frequency rate high-average power laser |
| US20020044586A1 (en) * | 1999-12-10 | 2002-04-18 | Myers David W. | Very narrow band, two chamber, high rep rate gas discharge laser system |
| CN101222111A (en) * | 2007-12-11 | 2008-07-16 | 中国科学院长春光学精密机械与物理研究所 | Ring-shaped channel type laser cavity |
| CN101807772A (en) * | 2010-04-12 | 2010-08-18 | 中国科学院长春光学精密机械与物理研究所 | Ring-shaped resonant laser cavity of high-power TEA (triethylamine) gas laser |
Non-Patent Citations (1)
| Title |
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| 邵明振 等: "高功率脉冲TEA CO2激光器主机结构设计与流场优化", 《红外与激光工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453199A (en) * | 2017-07-31 | 2017-12-08 | 中国科学院长春光学精密机械与物理研究所 | A kind of repetition rate giant-pulse gas laser laser head |
| CN114204386A (en) * | 2020-09-18 | 2022-03-18 | 中国科学院空天信息创新研究院 | Raising transverse excitation atmospheric pressure CO2Device and method for laser repetition frequency |
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Application publication date: 20130410 |