CN102570266A - Single-diode double-end pumping laser - Google Patents
Single-diode double-end pumping laser Download PDFInfo
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- CN102570266A CN102570266A CN2010106168008A CN201010616800A CN102570266A CN 102570266 A CN102570266 A CN 102570266A CN 2010106168008 A CN2010106168008 A CN 2010106168008A CN 201010616800 A CN201010616800 A CN 201010616800A CN 102570266 A CN102570266 A CN 102570266A
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Abstract
The invention relates to a single-diode double-end pumping laser, which comprises a pumping source, a collimating lens, a pumping light transmission optical fiber, a 50:50 light splitting plate, a first pumping light full reflector, a second pumping light full reflector, a first pumping light full reflector, a first focusing lens, a second focusing lens, a first pumping coupling mirror, a second coupling mirror, gain laser media and an oscillation laser output coupling mirror, wherein firstly, the pumping source is collimated by pumping laser output by the pumping light transmission optical fiber via the collimating lens, next, the 1:1 power distribution is carried out through the 50:50 light splitting plate, one of two beams of pumping laser after light splitting is turned back through a light path of the first pumping light full reflector, the other beam of pumping laser is turned back through light paths of the second pumping light full reflector and the third pumping light full reflector, and finally, gain laser media are respectively emitted and are output through the oscillation laser output coupling mirror. The single-diode double-end pumping laser has the advantages that the high-power laser output can be obtained, the structure is simple and compact, the debugging is convenient, the single-diode double-end pumping laser is suitable for mass production, and the practicability is high.
Description
Technical field
The present invention relates to the laser technology application, particularly relate to the laser that a kind of obtained high-power and high-lighting beam quality laser that utilizes single diode to realize both-end pumping is exported.
Background technology
At present, along with the continuous development of diode manufacturing technology, the power output of single diode is also constantly improving thereupon; Diode with tail optical fiber output is an example, and its laser power can be up to 60W, 80W, even a few hectowatt; But be prone to because of the inhomogeneous crystal thermal effect that causes of being heated because the laser of end-pumped laser is brilliant; Too high pumping laser power can cause the damage to crystal, therefore, in practical application, often is difficult to the diode of high power output directly is used for the end pumping structure.
Referring to shown in Figure 1, be the structural representation of typical single end face pump laser in the prior art.The laser of single end face pump shown in the figure comprises pumping laser Transmission Fibers 1, pumping shaping lens group 2, Effect of Back-Cavity Mirror 3, laser crystal 4 and outgoing mirror 5; Wherein, In order to reach the pattern matching condition, this single ended pump laser is when debuging, except wanting meticulous adjusting Effect of Back-Cavity Mirror 3 with the outgoing mirror 5; Also need regulate the position of pumping set of lenses 2, so that pumping laser 6 can reach best coincidence status with oscillating laser 7.But in the practical application, even so, said single end face pump laser also can still can't obtain the laser output of higher-wattage owing to the restriction of the single-ended pumping break limit of crystal.
Diode pumping Nd:YVO4 with 0.3% at present the most frequently used doping is an example, and the break limit of the single-ended pumping of its crystal can only obtain the low laser output power less than 15W usually about pump power 40W.
Therefore, in order further to improve the power output of end-pumped laser, the double-end pumping laser arises at the historic moment, and referring to shown in Figure 2, it is the structural representation of typical double-end pumping laser in the prior art.This double-end pumping laser comprises the first pumping laser Transmission Fibers 10, the first pumping shaping lens group 20, the second pumping shaping lens group 21, the second pumping laser Transmission Fibers 11, the first chamber mirror 8, the second chamber mirror 9, Effect of Back-Cavity Mirror 30, laser crystal 4 and outgoing mirror 12; Wherein, In this double-end pumping structure; Because being two end faces from laser crystal 4, injects respectively pumping laser; So the pump power that laser crystal 4 is allowed in the limit range of end face loss threshold value is doubled than single end face pump is whole, so double-end pumping laser power output when keeping mode quality well can significantly improve (power output of the highest can the acquisition >=30W).
But; Although the both-end pumping laser can obtain higher power output and better beam quality in the scope of laser crystal 4 break limits, in this kind pumping configuration, need inject respectively by the both direction of two diodes from laser crystal 4, it is for said single end face pump laser; In order to reach matching condition; Process is then very complicated, and regulates trouble, not only will regulate the first pumping set of lenses 20 and the second pumping set of lenses 21 so that first pumping laser 60 and second pumping laser 61 are with beyond oscillating laser 7 overlaps; Also need first pumping laser 60 and second pumping laser 61 is strict coaxial; So, just best pattern matching be can reach, and then best beam quality and the highest output laser power obtained.
In addition; The two-way pump diode also needs independent temperature control system of two-way and independent power supply and the drive part of two-way; And in the practical application; Avoid supplying power separately respectively and driving though can the two-way diode is together in series to use, the mode of this kind series connection be to need to sacrifice the best pumping condition of laser to a certain extent, so causes laser-conversion efficiency to reduce easily.
In sum, there is following problem in present single-ended/both-end pumping laser:
1) because the existence of crystal thermal effect, the restriction of promptly single-ended pumping break limit, single-ended pump laser can't obtain high-power laser output;
2) owing to need the two-way diode to inject from the laser crystal both direction respectively, coupling and adjustment process that the both-end pumping laser obtains high power and the output of high-quality laser are complicated;
3) because the employing series system is supplied power to the two-way diode jointly and driven, the laser-conversion efficiency of both-end pumping laser is low.
Summary of the invention
Based on existing in prior technology can't obtain high power laser light output, laser-conversion efficiency is low and coupling and adjustment process complicated problems; Main purpose of the present invention is to provide a kind of restriction that can solve the too high lens lesion fracture of single-ended pumping; The output of acquisition high power laser light; Can under the situation of using a diode, realize both-end pumping again, and the simple in structure and single easily diode both-end pumping laser of debugging.
To achieve these goals, single diode both-end pumping laser according to the invention adopts following technical scheme:
Single diode both-end pumping laser according to the invention comprise pumping source, collimating lens, pump light Transmission Fibers, 50: 50 light splitting pieces, the first pump light completely reflecting mirror, the second pump light completely reflecting mirror, the 3rd pump light completely reflecting mirror,, first condenser lens, second condenser lens, the first pumping coupling mirror, the second pumping coupling mirror, gain laser medium and oscillating laser output coupling mirror; Wherein, The pumping laser that said pumping source produces exports collimating lens to via the pump light Transmission Fibers and collimates; The pumping laser of said 50: 50 light splitting pieces after with collimation carries out beam split; After the beam split two bundle pumping laser; A branch ofly be sent to that the first pump light completely reflecting mirror carries out that light path is turned back and focus on and inject on gain laser medium one end face, and another Shu Ze is sent to the second pump light completely reflecting mirror and the 3rd pump light completely reflecting mirror and carries out that light path is turned back and focus on and inject on the other end of gain laser medium through the first pumping coupling mirror through first condenser lens through the second pumping coupling mirror through second condenser lens.
Further; Said first condenser lens is arranged between the 3rd pump light completely reflecting mirror and the first pumping coupling mirror; The said concussion laser output coupling mirror and the first pumping coupling mirror, the second pumping coupling mirror constitute laserresonator; And said gain laser medium is seated in the laserresonator, and between said first pumping coupling mirror and the said second pumping coupling mirror.
Said pumping source is the pumping optical fiber coupling diode.
The said first pumping coupling mirror and the second pumping coupling mirror have high-transmission rate to pump light, and oscillating laser is had total reflectivity, and said 50: 50 light splitting pieces carry out 1: 1 power division to pumping laser.
In addition; The present invention also provides a kind of single diode both-end pumping laser, and this laser further comprises pumping source, collimating lens, pump light Transmission Fibers, 50: 50 light splitting pieces, 1/2nd wave plates, the first pump light completely reflecting mirror, the second pump light completely reflecting mirror, the 3rd pump light completely reflecting mirror, first condenser lens, second condenser lens, the first pumping coupling mirror, the second pumping coupling mirror, gain laser medium and oscillating laser output coupling mirrors; Said 1/2nd wave plates are arranged between 50: 50 light splitting pieces and the collimating lens; Said first condenser lens is arranged between the 3rd pump light completely reflecting mirror and the first pumping coupling mirror; The said concussion laser output coupling mirror and the first pumping coupling mirror, the second pumping coupling mirror constitute laserresonator; Said gain laser medium is seated in the laserresonator, and between said first pumping coupling mirror and the said second pumping coupling mirror;
Wherein, The pumping laser that said pumping source produces exports collimating lens to via the pump light Transmission Fibers and collimates; And pass through said 50: 50 light splitting pieces and 1/2nd wave plates pumping laser after with collimation in regular turn and carry out 1: 1 power division; After the beam split two bundle pumping laser; A branch ofly be sent to that the first pump light completely reflecting mirror carries out that light path is turned back and focus on and inject on gain laser medium one end face, and another Shu Ze is sent to the second pump light completely reflecting mirror and the 3rd pump light completely reflecting mirror and carries out that light path is turned back and focus on and inject on the other end of gain laser medium through the first pumping coupling mirror through first condenser lens through the second pumping coupling mirror through second condenser lens.
Further, the said first pumping coupling mirror and the second pumping coupling mirror have high-transmission rate to pump light, and oscillating laser is had total reflectivity, and said pumping source is the pumping optical fiber coupling diode.
Single diode both-end pumping laser according to the invention has the following advantages:
1) adopt 50: 50 light splitting pieces that pumping laser is carried out beam split; Pumping laser can be injected from two end faces of laser medium; The pump power of laser medium is improved, and has avoided the restriction of the too high lens lesion fracture of single-ended pumping laser power, can obtain high power laser light output;
2) utilize a diode to realize both-end pumping, simple in structure and compact, debugging is convenient;
3) mass production of suitable product is practical.
Description of drawings
Fig. 1 is the structural representation of typical single end face pump laser in the prior art;
Fig. 2 is the structural representation of typical double-end pumping laser in the prior art;
Fig. 3 is the structural representation of single diode both-end pumping laser according to the invention.
Embodiment
Come the single diode both-end pumping laser of the present invention is done further to specify below in conjunction with accompanying drawing and specific embodiment.
Single diode both-end pumping laser according to the invention is a kind of new pumping configuration; It can give full play to the pumpage of single high-power optical fiber coupled module; Obtain the laser output of high-power and high-lighting beam quality; Both solved the restriction owing to the single-ended pumping break limit of crystal, the single end face pump laser can't obtain the problem of higher-wattage laser output, has realized utilizing single diode to realize both-end pumping again.
Referring to shown in Figure 3, said single diode both-end pumping laser comprises pumping source 310, collimating lens 312, pump light Transmission Fibers 313,50: 50 light splitting pieces 314, the first pump light completely reflecting mirror 315, the second pump light completely reflecting mirror 316, the 3rd pump light completely reflecting mirror 317, first condenser lens 318, second condenser lens 319, the first pumping coupling mirror 320, the second pumping coupling mirror 321, gain laser medium 322 and oscillating laser output coupling mirror 323.
Wherein, the pumping laser that said pumping source 310 produces exports collimating lens 312 to via pump light Transmission Fibers 313 and collimates, and in the practical application, this said pumping source 310 can be the pumping optical fiber coupling diode.
The pumping laser of said 50: 50 light splitting pieces after with collimation carries out 1: 1 power division, and then obtains two bundle pumping lasers, avoided in the prior art acquisition that the two-way diode removes to realize two-way pumping laser beam being set.
The said first pump light completely reflecting mirror 315, the second pump light completely reflecting mirror 316 and the 3rd pump light completely reflecting mirror 317 are turned back in order to the two-way pumping laser after the beam split is carried out light path, so that inject from gain laser medium 322 both ends of the surface.
Said first condenser lens 318 places between the 3rd pump light completely reflecting mirror 317 and the first pumping coupling mirror 320, for focusing in order to first pumping laser 401 after light path is turned back.
Said second condenser lens 319 places between the second pumping coupling mirror 321 and the first pump light completely reflecting mirror 315, for focusing in order to second pumping laser 402 after light path is turned back.
In the present invention; The said first pumping coupling mirror 320, the second pumping coupling mirror 321 constitute laserresonators with concussion laser output coupling mirror 323; In order to positive feedback to be provided; Make and activate the radiant energy that produces in the gain laser medium 322, when gain that stimulated radiation provided surpasses loss, in the chamber, amplified, set up and keep the characteristic of vibration light beam in self-oscillation and the control chamber, further guarantee the beam quality of output laser repeatedly through gain laser medium 322.
Said gain laser medium 322 is for being seated between said first pumping coupling mirror and the said second pumping coupling mirror; Wherein, The said first pumping coupling mirror 320 and 321 pairs of pump lights of the second pumping coupling mirror have high-transmission rate; Oscillating laser is had total reflectivity, and said high-transmission rate and total reflectivity are all more than 99%.
The operation principle of single diode both-end pumping laser according to the invention is following:
At first, adopt collimating lens 312 that the pumping laser of pumping optical fiber coupling diode 310 via 313 outputs of pumping optical fiber Transmission Fibers collimated.
Secondly; Pumping laser behind the collimation carries out 1: 1 power division via 50: 50 light splitting pieces 314; And the bundle of two after beam split pumping laser; Be pumping laser 401 and pumping laser 402; Pumping laser 402 carries out via the first pump light completely reflecting mirror 315 that light path is turned back and focuses on through second condenser lens 319, and injects the right side of gain laser medium 322 through the second pumping coupling mirror 321, and pumping laser 401 then carries out via the first pump light completely reflecting mirror 316 and the 3rd pump light completely reflecting mirror 317 that light path is turned back and focuses on through first condenser lens 318; And inject the left side of gain laser medium 322, thereby realize that two end faces are injected pumping laser from about the gain laser medium 322 through the first pumping coupling mirror 320.
At last, the laserresonator output oscillating laser 501 that forms from the said first pumping coupling mirror 320, the second pumping coupling mirror 321 and concussion laser output coupling mirror 323 is also exported through oscillating laser output coupling mirror 323.
In addition; As in further improvement of the present invention, said single diode both-end pumping laser also comprises 1/1st wave plate 324, and this 1/2nd wave plate 324 is arranged between said 50: 50 light splitting pieces 314 and the collimating lens 312; During practical application; Can realize the beam split ratio is finely tuned through rotating this two/wave plate 324, thereby can make two-way pumping laser after light splitting piece 314 beam split in 50: 50, promptly the power of first pumping laser 401 and second pumping laser 402 is consistent.
The above is merely the preferred embodiments of the present invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. single diode both-end pumping laser; It is characterized in that, comprise pumping source, collimating lens, pump light Transmission Fibers, 50: 50 light splitting pieces, the first pump light completely reflecting mirror, the second pump light completely reflecting mirror, the 3rd pump light completely reflecting mirror, first condenser lens, second condenser lens, the first pumping coupling mirror, the second pumping coupling mirror, gain laser medium and oscillating laser output coupling mirrors; Wherein, The pumping laser that said pumping source produces exports collimating lens to via the pump light Transmission Fibers and collimates; The pumping laser of said 50: 50 light splitting pieces after with collimation carries out beam split; After the beam split two bundle pumping laser; A branch ofly be sent to that the first pump light completely reflecting mirror carries out that light path is turned back and focus on and inject gain laser medium one end face through the second pumping coupling mirror through second condenser lens, another bundle is sent to that the second pump light completely reflecting mirror and the 3rd pump light completely reflecting mirror carry out that light path is turned back and focuses on and inject through the first pumping coupling mirror other end of gain laser medium through first condenser lens.
2. single diode both-end pumping laser according to claim 1 is characterized in that, said first condenser lens is arranged between the 3rd pump light completely reflecting mirror and the first pumping coupling mirror.
3. single diode both-end pumping laser according to claim 1 is characterized in that, the said concussion laser output coupling mirror and the first pumping coupling mirror, the second pumping coupling mirror constitute laserresonator.
4. single diode both-end pumping laser according to claim 1 is characterized in that, the said first pump coupling mirror and second pumping coupler have high-transmission rate to pump light, and oscillating laser is had total reflectivity.
5. single diode both-end pumping laser according to claim 1 is characterized in that said pumping source is the pumping optical fiber coupling diode.
6. single diode both-end pumping laser according to claim 1 is characterized in that, light splitting piece was in order to carry out 1: 1 power division to pumping laser in said 50: 50.
7. single diode both-end pumping laser according to claim 3 is characterized in that said gain laser medium is seated in the laserresonator, and between said first pumping coupling mirror and the said second pumping coupling mirror.
8. single diode both-end pumping laser; It is characterized in that, comprise pumping source, collimating lens, pump light Transmission Fibers, 50: 50 light splitting pieces, 1/2nd wave plates, the first pump light completely reflecting mirror, the second pump light completely reflecting mirror, the 3rd pump light completely reflecting mirror, first condenser lens, second condenser lens, the first pumping coupling mirror, the second pumping coupling mirror, gain laser medium and oscillating laser output coupling mirrors; Said 1/2nd wave plates are arranged between 50: 50 light splitting pieces and the collimating lens; Said first condenser lens is arranged between the 3rd pump light completely reflecting mirror and the first pumping coupling mirror; The said concussion laser output coupling mirror and the first pumping coupling mirror, the second pumping coupling mirror constitute laserresonator; Said gain laser medium is seated in the laserresonator, and between said first pumping coupling mirror and the said second pumping coupling mirror;
Wherein, The pumping laser that said pumping source produces exports collimating lens to via the pump light Transmission Fibers and collimates; And pass through said 50: 50 light splitting pieces and 1/2nd wave plates pumping laser after with collimation in regular turn and carry out 1: 1 power division; After the beam split two bundle pumping laser; A branch ofly be sent to that the first pump light completely reflecting mirror carries out that light path is turned back and focus on and inject gain laser medium one end face through the second pumping coupling mirror through second condenser lens, another bundle is sent to that the second pump light completely reflecting mirror and the 3rd pump light completely reflecting mirror carry out that light path is turned back and focuses on and inject through the first pumping coupling mirror other end of gain laser medium through first condenser lens.
9. single diode both-end pumping laser according to claim 8 is characterized in that, the said first pumping coupling mirror and the second pumping coupling mirror have high-transmission rate to pump light, and oscillating laser is had total reflectivity.
10. single diode both-end pumping laser according to claim 8 is characterized in that said pumping source is the pumping optical fiber coupling diode.
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| CN2010106168008A CN102570266A (en) | 2010-12-31 | 2010-12-31 | Single-diode double-end pumping laser |
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| CN2010106168008A CN102570266A (en) | 2010-12-31 | 2010-12-31 | Single-diode double-end pumping laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242038A (en) * | 2014-09-24 | 2014-12-24 | 福建福晶科技股份有限公司 | Optical fiber laser frequency doubling device |
| CN105261924A (en) * | 2015-11-09 | 2016-01-20 | 黑龙江工程学院 | Solid-state laser generating green continuous laser and method thereof |
| CN113809627A (en) * | 2021-11-18 | 2021-12-17 | 北京盛镭科技有限公司 | Laser amplifier |
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| US6137820A (en) * | 1995-02-15 | 2000-10-24 | Carl-Zeiss-Stiftung | Optically pumped laser |
| CN1848559A (en) * | 2005-04-12 | 2006-10-18 | 深圳市大族激光科技股份有限公司 | Semiconductor double-end pumping solid laser |
| CN101924320A (en) * | 2010-07-07 | 2010-12-22 | 北京理工大学 | Fabry-Perot cavity based non-modulating 2 mu m laser frequency stabilizing method and device thereof |
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2010
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Patent Citations (3)
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| US6137820A (en) * | 1995-02-15 | 2000-10-24 | Carl-Zeiss-Stiftung | Optically pumped laser |
| CN1848559A (en) * | 2005-04-12 | 2006-10-18 | 深圳市大族激光科技股份有限公司 | Semiconductor double-end pumping solid laser |
| CN101924320A (en) * | 2010-07-07 | 2010-12-22 | 北京理工大学 | Fabry-Perot cavity based non-modulating 2 mu m laser frequency stabilizing method and device thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242038A (en) * | 2014-09-24 | 2014-12-24 | 福建福晶科技股份有限公司 | Optical fiber laser frequency doubling device |
| CN105261924A (en) * | 2015-11-09 | 2016-01-20 | 黑龙江工程学院 | Solid-state laser generating green continuous laser and method thereof |
| CN105261924B (en) * | 2015-11-09 | 2018-05-18 | 黑龙江工程学院 | A kind of solid state laser and method for generating green light continuous laser |
| CN113809627A (en) * | 2021-11-18 | 2021-12-17 | 北京盛镭科技有限公司 | Laser amplifier |
| CN113809627B (en) * | 2021-11-18 | 2022-03-01 | 北京盛镭科技有限公司 | Laser amplifier |
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Application publication date: 20120711 |