CN105006738A - Parallel connection end-pumped series amplifying high-power laser - Google Patents
Parallel connection end-pumped series amplifying high-power laser Download PDFInfo
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- CN105006738A CN105006738A CN201510494191.6A CN201510494191A CN105006738A CN 105006738 A CN105006738 A CN 105006738A CN 201510494191 A CN201510494191 A CN 201510494191A CN 105006738 A CN105006738 A CN 105006738A
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Abstract
The invention discloses a parallel connection end-pumped series amplifying high-power laser, which comprises a resonant cavity formed by a first totally reflecting mirror and an output mirror, and is characterized by further comprising a plurality of side-pumped modules and a plurality of parallelly connected end-pumped lasers, wherein the plurality of side-pumped modules are connected in the resonant cavity in series and form a side amplifying light path which is vertical with an optical axis of each end-pumped laser, each end-pumped laser comprises an end-pumped device formed by a pumping source, a coupling mirror and a laser crystal, a sub resonant cavity formed by a second totally reflecting mirror and a third totally reflecting mirror, a Q-switch arranged in the sub resonant cavity and a half transparent and half reflecting mirror used for reflecting and outputting laser, an included angle between the optical axis of each end-pumped laser and the half transparent and half reflecting mirror therein is 45 degrees, and pulse laser, which is reflected and outputted by each of the half transparent and half reflecting mirrors, is amplified by the side-pumped modules, then combined into a beam in the resonant cavity and outputted from an output mirror. The parallel connection end-pumped series amplifying high-power laser disclosed by the invention can form laser output with high power and low cost.
Description
Technical field
The present invention relates to a kind of laser, particularly relate to a kind of parallel connected end series connection of pumps and amplify superpower laser.
Background technology
High power solid state laser has the advantages such as high power laser light output, high light beam quality, high long-time stability, component compact, extensive application in industry, national defence, medical treatment, environmental protection and scientific research.At present, improving solid state laser power output method the most general is exactly that many rods are connected, or multi-laser association bundle.
Laser output power stability in many rod series connection, the pattern that Thermal property differences causes between rod the problem such as not to be mated and are had a strong impact on industrial production demand.At present, conventional series laser rod quantity only has two, can not meet the demand of superpower laser far away.
Multi-laser association bundle technology are the emphasis of research recent years, but correlative study is at home main or launch for fiber laser.The rarely seen employing optical shaping of report of diode pumping solid laser closes bundle and lens focus closes bundle two kinds of methods, its common problem be exactly laser export laser to realize each other being concerned with, high to installing positioning requirements for relevant optics, implementation method cost is high, and this must affect the use interest of medium and low-end users to laser.
Summary of the invention
The object of this invention is to provide a kind of parallel connected end series connection of pumps and amplify superpower laser, can power output be improved, form the Laser output of high power, low cost.
For achieving the above object, the invention provides a kind of parallel connected end series connection of pumps and amplify superpower laser, comprise the resonant cavity be made up of the first total reflective mirror and outgoing mirror, also comprise multiple side pumping module and multiple end-pumped laser be in parallel, three side pumping modules to be series in resonant cavity and to form a side and amplify light path, it is vertical with the optical axis of each end-pumped laser that light path is amplified in side, each end-pumped laser comprises by pumping source, the end pumping device that coupling mirror and laser crystal are formed, the sub resonant cavity be made up of the second total reflective mirror and the 3rd total reflective mirror, be located in sub resonant cavity for modulating the Q switching producing pulse laser and the semi-transparent semi-reflecting lens also exported for reflected impulse laser, the angle of the optical axis of each end-pumped laser and the semi-transparent semi-reflecting lens in it is 45 °, each semi-transparent semi-reflecting lens reflect and the pulse laser exported after the amplification of side pumping module described in one and association bundle to resonant cavity in and export from outgoing mirror.
As a further improvement on the present invention, the end pumping device of each end-pumped laser has two groups, and two groups of end pumping devices are distributed in the two ends of end-pumped laser, is Q switching and semi-transparent semi-reflecting lens between two groups of end pumping devices.
Further improve as of the present invention, described pumping source is the diode pumping source exporting 808nm wavelength pump light.
Further improve as of the present invention, described coupling mirror is made up of two-piece type lens, and two panels lens are all coated with 808nm anti-reflection film.
Further improve as of the present invention, described laser crystal is Nd:YAG crystal.
Further improve as of the present invention, described second total reflective mirror is level crossing, planoconvex lens or plano-concave mirror, second total reflective mirror is coated with and 1064nm high anti-deielectric-coating thoroughly high to 808nm, described 3rd total reflective mirror is level crossing, planoconvex lens or plano-concave mirror, the 3rd total reflective mirror is coated with to the high anti-deielectric-coating of 1064nm.
Further improve as of the present invention, described semi-transparent semi-reflecting lens is level crossing, semi-transparent semi-reflecting lens is coated with the part reflecting medium film to 1064nm and 808nm wavelength anti-reflection film.
Further improve as of the present invention, described Q switching position adopts the acoustooptic Q-switching of vitreous silica, and its supersonic frequency is 40.68MHz, and Q switching is two-sided is coated with 1064nm anti-reflection film.
Further improve as of the present invention, described side pumping module is laser diode side pumped Nd:YAG crystal laser module, and the two ends of side pumping module are coated with 1064nm anti-reflection film.
Further improve as of the present invention, described first total reflective mirror is level crossing, planoconvex lens or plano-concave mirror, first total reflective mirror is coated with to the high anti-deielectric-coating of 1064nm, described outgoing mirror is level crossing, planoconvex lens or plano-concave mirror, outgoing mirror is coated with the part reflecting medium film of 1064nm.
Compared with prior art, the beneficial effect of parallel connected end series connection of pumps amplification superpower laser of the present invention is as follows:
(1) the also cascaded structure that superpower laser adopts end pumping and profile pump to combine is amplified in parallel connected end series connection of pumps, the Output of laser power that superpower laser is amplified in parallel connected end series connection of pumps mainly comes from side pumping module, end-pumped laser power output does not need very high, each sub resonant cavity is independent of one another, the 1064nm light of institute's radiation independently shakes, do not interfere with each other, end-pumped laser is used for providing each seed laser with high light beam quality and linear polarization degree to side pumping module, such side pumping module just can export the laser of high light beam quality and linear polarization degree, and then its conversion efficiency can be improved, greatly improve power output, form high power, the Laser output of low cost, also correspondingly reduce the high thermal effect stress born required for end-pumped laser, avoid Thermal cracking problem occurs, the peak power output of laser no longer restricts by the Thermal cracking of end-pumped laser.
(2) each subsystem of parallel connected end series connection of pumps amplification superpower laser is coupled by semi-transparent semi-reflecting lens, amplify under side pumping module, form high light beam quality, high-power Laser output, decrease in pumping process in parallel, in order to ensure that each subsystem exports the coherent superposition of light, subsystem exports beam waist position and the size of light to adopt the means such as shaping or focusing to ensure, the relevant requirement that the angle of divergence is necessary equal, save high cost components and parts needed for the output light coherent superposition in the process of closing bundle, decrease to close in bundle process and positioning requirements is installed to the high accuracy of shaping mirror or focus lamp.
By following description also by reference to the accompanying drawings, the present invention will become more clear, and these accompanying drawings are for explaining embodiments of the invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that superpower laser embodiment one is amplified in parallel connected end series connection of pumps of the present invention.
Fig. 2 is the schematic diagram that superpower laser embodiment two is amplified in parallel connected end series connection of pumps of the present invention.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, element numbers similar in accompanying drawing represents similar element.
Embodiment one
Please refer to Fig. 1, described parallel connected end series connection of pumps is amplified superpower laser and is comprised three side pumping modules, 9, three end-pumped lasers 10 and amplify resonant cavity.
Amplify resonant cavity to be made up of the first total reflective mirror 8 and outgoing mirror 11.Three side pumping modules 9 are series at and amplify in resonant cavity, form a side and amplify light path.Three end-pumped lasers 10 are in parallel setting, the optical axis of three end-pumped lasers 10 is parallel, three end-pumped lasers 10 are distributed between two adjacent side pumping modules 9 and between the first total reflective mirror 8 and the side pumping module 9 close to this first total reflective mirror 8, and the optical axis of three end-pumped lasers 10 all vertically amplifies resonant cavity.Each end-pumped laser 10 comprises the end pumping device be made up of pumping source 1, coupling mirror 2 and laser crystal 4, the sub resonant cavity be made up of the second total reflective mirror 3 and the 3rd total reflective mirror 7, is located in sub resonant cavity for modulating the Q switching 5 of generation pulse laser and reflecting for being carried out by pulse laser the semi-transparent semi-reflecting lens 6 exported.
Wherein, pumping source 1 is the diode pumping source exporting 808nm wavelength pump light.Coupling mirror 2 is made up of two-piece type lens, and two panels lens are all coated with 808nm anti-reflection film, and magnification ratio is 1:2, inner for pump light being focused on laser crystal 4.Second total reflective mirror 3 is chamber, one end mirrors of sub resonant cavity, can be level crossing, planoconvex lens or plano-concave mirror, it is coated with and 1064nm high anti-deielectric-coating thoroughly high to 808nm.Laser crystal 4 is Nd:YAG crystal.3rd total reflective mirror 7 is the other end chamber mirror of sub resonant cavity, can be level crossing, planoconvex lens or plano-concave mirror, it is coated with to the high anti-deielectric-coating of 1064nm.Semi-transparent semi-reflecting lens 6 is level crossing, it is the outgoing mirror of end-pumped laser 10, semi-transparent semi-reflecting lens 6 and the optical axis angle at 45 ° of end-pumped laser 10, it is coated with the part reflecting medium film to 1064nm and 808nm wavelength anti-reflection film, can reflects the laser of 1064nm.Q switching 5 adopts the acoustooptic Q-switching of vitreous silica, and its supersonic frequency is 40.68MHz, and it is two-sided is coated with 1064nm anti-reflection film, for modulating generation pulse laser.Side pumping module 9 is laser diode side pumped Nd:YAG crystal laser module, and its two ends are coated with 1064nm anti-reflection film.First total reflective mirror 8 is chamber, one end mirror amplifying resonant cavity, can be level crossing, planoconvex lens or plano-concave mirror, it is coated with to the high anti-deielectric-coating of 1064nm.Outgoing mirror 11 is the other end chamber mirror amplifying resonant cavity, and being also the outgoing mirror of whole high power parallel end series connection of pumps amplify laser, can be level crossing, planoconvex lens or plano-concave mirror, it is coated with the part reflecting medium film of 1064nm.
During work, the pump light that each end-pumped laser 10 is produced by pumping source 1 focuses on laser crystal 4 through coupling mirror 2 and carries out end pumping, under the modulating action of Q switching 5, produce pulse laser, and exported by semi-transparent semi-reflecting lens 6, form a road independently end-pumped laser.The fundamental frequency light of each semi-transparent semi-reflecting lens 6 transmission and the second total reflective mirror 3 to the three total reflective mirror 7 are formed holds pump sub resonant cavity, the 1064nm laser that each semi-transparent semi-reflecting lens 6 reflects association bundle amplify in light path to the side of the optical axis vertical direction with each end-pumped laser 10 and namely amplify in resonant cavity, the 1064nm laser that each semi-transparent semi-reflecting lens 6 reflects, under the amplification of side pumping module 9, the first total reflective mirror 8, outgoing mirror 11 form amplification resonant cavity in formed amplify, and close restraint and the laser amplified finally from outgoing mirror 11 output high-power laser.
Utilize the conjunction Shu Zuoyong of semi-transparent semi-reflecting lens 6, can realize the Parallel opertation of multiple end-pumped laser 10, under the amplification of side pumping module 9, the series connection forming each seed laser is amplified, finally export from outgoing mirror 11, thus define the Laser output of high power, low cost.Semi-transparent semi-reflecting lens 6 and the side pumping module 9 of each end-pumped laser 10 and correspondence combine formation subsystem module, make parallel connected end series connection of pumps of the present invention amplify superpower laser and form modularized design, be convenient to later maintenance replace, or swap modules increases or reduces laser output power, such modularized design is conducive to parallel connected end series connection of pumps and amplifies superpower laser suitability for industrialized production and industrialization.
Embodiment two
Please refer to Fig. 2, the difference of the present embodiment and above-described embodiment one is only: the end pumping device of each end-pumped laser 10 has two groups, two groups of end pumping devices are distributed in the two ends of end-pumped laser 10, forming double-ended pump laser, is Q switching 5 and semi-transparent semi-reflecting lens 6 between two groups of end pumping devices.
Semi-transparent semi-reflecting outgoing mirror 6 and the side pumping module 9 of double-ended pump laser and correspondence can be combined into a subsystem module, be convenient to later maintenance replace, or swap modules increases or reduces laser output power, such modularized design is conducive to parallel connected end series connection of pumps and amplifies superpower laser suitability for industrialized production and industrialization.Each subsystem module adopts the corresponding laser crystal 4 of both-end pumping, and each seed laser that superpower laser output is amplified in parallel connected end series connection of pumps will have larger power stage, also will be improved greatly for laser device laser power output of the present invention.
The present invention can also have other embodiments, and in other embodiments, end-pumped laser 10 can be 4 or 5 or more, and the quantity of side pumping module 9 is identical with the quantity of end-pumped laser 10.
More than in conjunction with most preferred embodiment, invention has been described, but the present invention is not limited to the embodiment of above announcement, and should contain various carry out according to essence of the present invention amendment, equivalent combinations.
Claims (10)
1. superpower laser is amplified in a parallel connected end series connection of pumps, comprise the resonant cavity be made up of the first total reflective mirror and outgoing mirror, it is characterized in that: also comprise multiple side pumping module and multiple end-pumped laser be in parallel, multiple side pumping module to be series in resonant cavity and to form a side and amplifies light path, it is vertical with the optical axis of each end-pumped laser that light path is amplified in side, each end-pumped laser comprises by pumping source, the end pumping device that coupling mirror and laser crystal are formed, the sub resonant cavity be made up of the second total reflective mirror and the 3rd total reflective mirror, be located in sub resonant cavity for modulating the Q switching producing pulse laser and the semi-transparent semi-reflecting lens also exported for reflected impulse laser, the angle of the optical axis of each end-pumped laser and the semi-transparent semi-reflecting lens in it is 45 °, each semi-transparent semi-reflecting lens reflect and the pulse laser exported after the amplification of side pumping module described in one and association bundle to resonant cavity in and export from outgoing mirror.
2. superpower laser is amplified in parallel connected end series connection of pumps as claimed in claim 1, it is characterized in that: the end pumping device of each end-pumped laser has two groups, two groups of end pumping devices are distributed in the two ends of end-pumped laser, are Q switching and semi-transparent semi-reflecting lens between two groups of end pumping devices.
3. superpower laser is amplified in parallel connected end series connection of pumps as claimed in claim 1 or 2, it is characterized in that: described pumping source is the diode pumping source exporting 808nm wavelength pump light.
4. superpower laser is amplified in parallel connected end series connection of pumps as claimed in claim 1 or 2, and it is characterized in that: described coupling mirror is made up of two-piece type lens, two panels lens are all coated with 808nm anti-reflection film.
5. superpower laser is amplified in parallel connected end series connection of pumps as claimed in claim 1 or 2, it is characterized in that: described laser crystal is Nd:YAG crystal.
6. superpower laser is amplified in parallel connected end series connection of pumps as claimed in claim 1 or 2, it is characterized in that: described second total reflective mirror is level crossing, planoconvex lens or plano-concave mirror, second total reflective mirror is coated with and 1064nm high anti-deielectric-coating thoroughly high to 808nm, described 3rd total reflective mirror is level crossing, planoconvex lens or plano-concave mirror, the 3rd total reflective mirror is coated with to the high anti-deielectric-coating of 1064nm.
7. superpower laser is amplified in parallel connected end series connection of pumps as claimed in claim 1 or 2, it is characterized in that: described semi-transparent semi-reflecting lens is level crossing, semi-transparent semi-reflecting lens is coated with the part reflecting medium film to 1064nm and 808nm wavelength anti-reflection film.
8. superpower laser is amplified in parallel connected end series connection of pumps as claimed in claim 1 or 2, it is characterized in that: described Q switching position adopts the acoustooptic Q-switching of vitreous silica, and its supersonic frequency is 40.68MHz, and Q switching is two-sided is coated with 1064nm anti-reflection film.
9. superpower laser is amplified in parallel connected end series connection of pumps as claimed in claim 1 or 2, it is characterized in that: described side pumping module is laser diode side pumped Nd:YAG crystal laser module, and the two ends of side pumping module are coated with 1064nm anti-reflection film.
10. superpower laser is amplified in parallel connected end series connection of pumps as claimed in claim 1 or 2, it is characterized in that: described first total reflective mirror is level crossing, planoconvex lens or plano-concave mirror, first total reflective mirror is coated with to the high anti-deielectric-coating of 1064nm, described outgoing mirror is level crossing, planoconvex lens or plano-concave mirror, outgoing mirror is coated with the part reflecting medium film of 1064nm.
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Cited By (6)
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| CN105510005A (en) * | 2016-01-13 | 2016-04-20 | 中国工程物理研究院激光聚变研究中心 | Measuring instrument for transmittance and reflectivity of optical element |
| CN109449738A (en) * | 2018-12-18 | 2019-03-08 | 中国科学院合肥物质科学研究院 | Two-way coherent combining laser device |
| CN109659807A (en) * | 2018-12-18 | 2019-04-19 | 中国科学院合肥物质科学研究院 | Multikilowatt power pulse Nd:YAG laser |
| CN109672077A (en) * | 2018-12-18 | 2019-04-23 | 中国科学院合肥物质科学研究院 | Burst pulse holmium laser |
| CN112467505A (en) * | 2020-12-14 | 2021-03-09 | 中国科学院合肥物质科学研究院 | Three-path coherent synthesis laser |
| CN112490837A (en) * | 2020-12-14 | 2021-03-12 | 中国科学院合肥物质科学研究院 | Four-path coherent synthesis laser |
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| CN112490837A (en) * | 2020-12-14 | 2021-03-12 | 中国科学院合肥物质科学研究院 | Four-path coherent synthesis laser |
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| CN112490837B (en) * | 2020-12-14 | 2024-04-02 | 中国科学院合肥物质科学研究院 | Four-way coherent combining laser |
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