CN101710669B - Double-output end face pumping all-solid-state laser - Google Patents
Double-output end face pumping all-solid-state laser Download PDFInfo
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- CN101710669B CN101710669B CN2009102623576A CN200910262357A CN101710669B CN 101710669 B CN101710669 B CN 101710669B CN 2009102623576 A CN2009102623576 A CN 2009102623576A CN 200910262357 A CN200910262357 A CN 200910262357A CN 101710669 B CN101710669 B CN 101710669B
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Abstract
The invention relates to a laser, in particular to a double-output end face pumping all-solid-state laser, comprising two pumping sources, a linear type resonant cavity, two dichroscopes and two gain media, wherein the first and second dichroscopes are respectively arranged on the output pumping optical path of the first and second pumping source and form a certain included angle with the output pumping optical path, to ensure that the refraction optical path of the dichroscopes to the pumping light coincide with the resonant optical path in the resonant cavity; and the first and second gain media are arranged on the linear type resonant optical path between the first and second dichroscopes. The invention aims at designing a double-output end face pumping all-solid-state laser which can simultaneously output two beams of laser beams with equal power; and compared with the prior art, the invention has the advantages of coincident physical parameters output by laser beams, great output power, strong applicability, high quality of light beams and the like.
Description
Technical field
The present invention relates to laser, particularly a kind of double-output end face pumping all-solid-state laser.
Background technology
The diode pumping full-solid laser is meant the laser that replaces flash-lamp pump pumping solid laser gain media with laser diode, the advantage of it is integrated diode laser and solid state laser is in one, has the conversion efficiency height, component compact, volume is little, and the life-span is long, the reliability height, sound construction, characteristics such as good beam quality.
The end pumping mode is that the end face along laser crystal carries out pumping, it is laser diode pump solid state laser device a kind of pump mode commonly used, its gain medium is a solid dielectric, energy doped with high concentration ion, thereby make and easily form the high power density laser photon in the laser medium, has higher light light conversion efficiency, lower laser output threshold value.In end face pumping all-solid-state laser, the laser beam of diode laser output by coupled fiber and optical focusing system after, enter into laser medium along the gain medium optical direction, overlap with the resonance light beam in the resonant cavity, can obtain good beam mode coupling, with its can be maximum the energy that utilizes laser diode output, so both improved the whole conversion efficiency of laser, can improve the beam quality of output light again.
In the practical application in industry of some end-pumped lasers, need in same laser, export the identical laser beam of two beam powers.As in the industrial lasers mark, when needs once carry out same tag simultaneously to two products, perhaps when an enterprising rower of bigger area is carved, traditional output beam of laser obviously can not satisfy above-mentioned requirements, conventional method is the front end at a diode laser end face pumping all-solid-state laser light beam, additionally adds a device, i.e. the so-called optical optical splitter, with optical spectroscope beam of laser is divided into two light beams, and then uses.Will in the process of beam split, inevitably understand loss laser output energy but do like this, also can make original good laser output facula pattern variation simultaneously.Because spectrophotometric result is not good, will cause two bundle laser beam power differences, the spot size of output light does not wait, and the polarization direction also changes to some extent.
Summary of the invention
The objective of the invention is to design and a kind ofly can export the double-output end face pumping all-solid-state laser that two bundle laser beams and power equate simultaneously.
In order to achieve the above object, the present invention adopts following technical solution: a kind of double-output end face pumping all-solid-state laser, it is characterized in that it comprises first pumping source, second pumping source, resonant cavity, first two-phase look mirror, second two-phase look mirror, first gain media and second gain media, wherein, described resonant cavity is made of the plane output coupling mirror of two opposing parallel settings, the resonant optical path of described resonant cavity is a linear pattern, described first two-phase look mirror and second two-phase look mirror are located at respectively on the output pumping light path of described first pumping source and second pumping source, and it is in a certain angle with the output pumping light path at place, make two-phase look mirror play the refraction effect to pump light, described first two-phase look mirror and second two-phase look mirror are provided with direction and are 90 ° of angles, the refractive light paths of described first two-phase look mirror and second two-phase look mirror overlaps in twos with the resonant optical path in the resonant cavity, and described first gain media and second gain media are located on the linear pattern resonant optical path at place between described first two-phase look mirror and second the two-phase look mirror.
The best output of described plane output coupling mirror transmitance is 20%.
Described first two-phase look mirror and second two-phase look mirror are 45 ° of angles with the pumping light path traffic direction at place respectively, and two-phase look mirror both sides have been coated with the anti-reflection deielectric-coating of harmonic light, and the side that two-phase look mirror is relative with pump light has been coated with the pump light film that is all-trans.
In order to achieve the above object, the present invention can also adopt following another kind of technical solution: a kind of double-output end face pumping all-solid-state laser, it is characterized in that it comprises first pumping source, second pumping source, resonant cavity, first gain media and second gain media, wherein, described resonant cavity is by the first plane output coupling mirror that is arranged on the same horizontal line, the second plane output coupling mirror, first two-phase look mirror and second two-phase look mirror constitute, the resonant optical path of described resonant cavity is " U " type, described first two-phase look mirror and second two-phase look mirror are located at the breakover point place of " U " type resonant optical path, and it is in a certain angle with the resonant optical path at place, make two-phase look mirror play the refraction effect to harmonic light, described first two-phase look mirror and second two-phase look mirror are provided with direction and are 90 ° of angles, described first gain media and second gain media are located on the resonant optical path at place between described first two-phase look mirror and second the two-phase look mirror, and the resonant optical path at the output pumping light path of described first pumping source and second pumping source and described first gain media and the second gain media place coincides.
The best output of described plane output coupling mirror transmitance is 20%.
Described first two-phase look mirror and second two-phase look mirror are 45 ° of angles with the resonant optical path traffic direction at place respectively, and two-phase look mirror both sides have been coated with the anti-reflection deielectric-coating of pump light, and the side that two-phase look mirror is relative with harmonic light also has been coated with the harmonic light film that is all-trans.
Because all solid state laser characteristics of the present invention are not have to return mirror entirely, two chamber mirrors that constitute resonant cavity can adopt the equal output coupling mirror of transmitance, two bundle laser beams of output are produced by same resonant cavity, therefore the power of its output not only equates, and polarization direction, output beam radius and the angle of divergence are also identical.Simultaneously, by the output transmitance of two output coupling mirrors of adjusted in concert, guaranteeing has enough photon energies to guarantee enough gains in the resonant cavity, to continue output laser.
Description of drawings
Below in conjunction with drawings and Examples the present invention is described in further detail.
Fig. 1 is present embodiment 1 a structural principle schematic diagram.
Fig. 2 is present embodiment 2 structural principle schematic diagrames.
Embodiment
Embodiment 1:
As shown in Figure 1, present embodiment 1 comprises first pumping source 8, second pumping source 7, resonant cavity, first two-phase look mirror 2, second two-phase look mirror 5, first gain media 3 and second gain media 4, wherein, the plane output coupling mirror 1 that described resonant cavity is provided with by two opposing parallel, 6 constitute, the resonant optical path of described resonant cavity is a linear pattern, described first two-phase look mirror 2 and second two-phase look mirror 5 are located at respectively on the output pumping light path of described first pumping source 8 and second pumping source 7, and it is in a certain angle with the output pumping light path at place, make two-phase look mirror play the refraction effect to pump light, described first two-phase look mirror 2 and second two-phase look mirror 5 are provided with direction and are 90 ° of angles, the refractive light paths of described first two-phase look mirror 2 and second two-phase look mirror 5 overlaps in twos with the resonant optical path in the resonant cavity, and described first gain media 3 and second gain media 4 are located on the linear pattern resonant optical path at place between described first two-phase look mirror 2 and second the two-phase look mirror 5.
Output coupling mirror 1,6 best output transmitances in described plane are 20%.If crossing conference, general output coupling mirror output transmitance increases its laser output threshold value; If too small, in the laser of output with constant power, the photon density in the resonant cavity is excessive, when the needs pulse is exported, increases difficulty to Q-switching device lock light, and long-time steady operation is also had certain influence.Therefore two output coupling mirrors are arranged here, and the output transmitance of single output coupling mirror can not be excessive, and the output transmitance is 20% optimum value that obtains for us.
Described first two-phase look mirror 2 and second two-phase look mirror 5 are 45 ° of angles with the pumping light path traffic direction at place respectively, and two-phase look mirror both sides have been coated with the anti-reflection deielectric-coating of harmonic light, and the side that two-phase look mirror is relative with pump light has been coated with the pump light film that is all-trans.
Two-phase look mirror both sides are coated with the anti-reflection deielectric-coating of harmonic light, make harmonic light in resonant cavity interior resonance running, during by two-phase look mirror, reduce the energy loss that harmonic light causes in the effect of two surface reflections of two-phase look mirror or scattering, reduce laser threshold, improve its power output.
Two-phase look mirror also will be coated with the film that is all-trans of pump light under the situation of 45 degree near pump light one side in addition, to change the traffic direction of pump light, so that pump direction is collinear with the crystal optical direction after changing 45 °, enters the laser gain crystal smoothly.
During work, equate by first pumping source 8 and second pumping source, 7 while power output, spot size is 0.4mm, two bundle pump lights of energy even, then simultaneously through two-phase look mirror 2, after changing 90 °, 5 reflections enter into gain media, two identical gain medias 3,4 produce fluorescent radiation respectively after absorbing identical pump energy, vibration back and forth in the light path of the fluorescence that radiation produces between the laserresonator that two output coupling mirrors are formed, harmonic light is respectively by two gain medias the time, produce stronger stimulated radiation, when the number of photons of resonant cavity interior resonance surpasses the output threshold value of itself, part resonant laser light is respectively simultaneously by output coupling mirror 1,6, output wavelength is the two bundle laser beams of 1064nm, two bundle laser beam power output equal and opposite in directions, the polarization direction is identical, and the output beam radius and the angle of divergence are also identical.Along with the increase of pump energy, the power of the laser beam that two bundle physical parameters are identical also increases simultaneously synchronously.
Embodiment 2:
As shown in Figure 2, present embodiment 2 comprises first pumping source 8, second pumping source 7, resonant cavity, first gain media 3 and second gain media 4, wherein, described resonant cavity is by the first plane output coupling mirror 1 that is arranged on the same horizontal line, the second plane output coupling mirror 6, first two-phase look mirror 2 and second two-phase look mirror 5 constitute, the resonant optical path of described resonant cavity is " U " type, described first two-phase look mirror 2 and second two-phase look mirror 5 are located at the breakover point place of " U " type resonant optical path, described first gain media 3 and second gain media 4 are located on the resonant optical path at place between described first two-phase look mirror 2 and second the two-phase look mirror 5, and the resonant optical path at the output pumping light path of described first pumping source 8 and second pumping source 7 and described first gain media 3 and second gain media, 4 places coincides.
Output coupling mirror 1,6 best output transmitances in described plane are 20%.
Described first two-phase look mirror 2 is 45 ° of angles with the pumping light path traffic direction at place, described second two-phase look mirror 5 is 45 ° of angles with the pumping light path traffic direction at place, two-phase look mirror both sides have been coated with the anti-reflection deielectric-coating of harmonic light, and the side that two-phase look mirror is relative with pump light has been coated with the pump light film that is all-trans.
Described first two-phase look mirror 2 and second two-phase look mirror 5 are 45 ° of angles with the resonant optical path traffic direction at place respectively, two-phase look mirror both sides have been coated with the anti-reflection deielectric-coating of pump light, and the side that two-phase look mirror is relative with harmonic light also has been coated with the harmonic light film that is all-trans.
Two-phase look mirror is coated with the harmonic light film that is all-trans, purpose is to make harmonic light when the resonant cavity interior resonance, change the harmonic light traffic direction, allow harmonic light noenergy loss herein again, make chamber interior resonance light operation become folded form by straight line, make in the light path each optical element compact more, to reduce the laser entire length.
Two-phase look mirror both sides are coated with the anti-reflection deielectric-coating of pump light, make pump light before entering gain media, can make the most of energy of pump light by two-phase look mirror, reduce the loss herein of its pump energy, enter gain media to greatest extent.
During work, equate by first pumping source 8 and second pumping source, 7 while power output, spot size is 0.4mm, two bundle pump lights of energy even, then simultaneously by entering into gain media behind first two-phase look mirror 2 and second two-phase look mirror 5, two identical gain medias 3,4 produce fluorescent radiation respectively after absorbing identical pump energy, the fluorescence that radiation produces is at two output coupling mirrors 1,6 and two-phase look mirror 2, vibration back and forth in " U " type light path of 5 laserresonators of forming, harmonic light is respectively by two gain medias the time, produce stronger stimulated radiation, when the number of photons of resonant cavity interior resonance vibration surpasses the output threshold value of itself, part resonant laser light is respectively simultaneously by output coupling mirror 1,6, output wavelength is the two bundle laser beams of 1064nm, two bundle laser beam power output equal and opposite in directions, the polarization direction is identical, and the output beam radius and the angle of divergence are also identical.Along with the increase of pump energy, the power of the laser beam that two bundle physical parameters are identical also increases simultaneously synchronously.
In sum, the present invention compared with prior art has the following advantages:
1, laser beam output physical parameter is consistent. Because two bundle laser beams of output are produced by same resonator, the power of its output not only equates, and polarization direction, output beam radius and the angle of divergence are also identical.
2, power output is big, and is practical. Owing to adopt the double pumping action system, the whole pumping input power of laser instrument obtains increasing, make the power output of any a branch of light beam in the identical laser beam of two bundles all be not less than the power that traditional single end face pump laser instrument is exported, single beam bundle power output is big, and is practical.
3, good beam quality. Owing to adopt the bicrystal structure, alleviated the thermal lensing effect of laser instrument itself, and then improved the beam quality of laser instrument output light, so that laser instrument also possesses good beam quality in the output relatively high power.
Claims (3)
1. double-output end face pumping all-solid-state laser, it is characterized in that it comprises first pumping source (8), second pumping source (7), resonant cavity, first two-phase look mirror (2), second two-phase look mirror (5), first gain media (3) and second gain media (4), wherein, the plane output coupling mirror (1 that described resonant cavity is provided with by two opposing parallel, 6) constitute, the resonant optical path of described resonant cavity is a linear pattern, described first two-phase look mirror (2) and second two-phase look mirror (5) are located at respectively on the output pumping light path of described first pumping source (8) and second pumping source (7), and it is in a certain angle with the output pumping light path at place, make two-phase look mirror play the refraction effect to pump light, described first two-phase look mirror (2) and second two-phase look mirror (5) are provided with direction and are 90 ° of angles, the refractive light paths of described first two-phase look mirror (2) and second two-phase look mirror (5) overlaps in twos with the resonant optical path in the resonant cavity, and described first gain media (3) and second gain media (4) are located on the linear pattern resonant optical path at place between described first two-phase look mirror (2) and second the two-phase look mirror (5).
2. double-output end face pumping all-solid-state laser according to claim 1 is characterized in that described plane output coupling mirror (1,6) output transmitance is 20%.
3. double-output end face pumping all-solid-state laser according to claim 2, it is characterized in that described first two-phase look mirror (2) and second two-phase look mirror (5) are 45 ° of angles with the pumping light path traffic direction at place respectively, two-phase look mirror both sides have been coated with the anti-reflection deielectric-coating of harmonic light, and the side that two-phase look mirror is relative with pump light also has been coated with the pump light film that is all-trans.
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| CN103390854B (en) * | 2013-06-26 | 2016-03-30 | 温州市德罗斯激光科技有限公司 | Two single-ended pumping two-rod series connection solid state laser |
| CN106898937B (en) * | 2017-02-16 | 2019-07-23 | 中国科学院电子学研究所 | Semiconductor laser side face couples the alkali metal laser axially pumped |
| CN109119875B (en) * | 2018-09-21 | 2019-09-06 | 深圳市杰普特光电股份有限公司 | Bicrystal infrared laser |
| CN108963741B (en) * | 2018-09-21 | 2019-10-18 | 深圳市杰普特光电股份有限公司 | Bicrystal green (light) laser |
| CN117277038A (en) * | 2023-11-21 | 2023-12-22 | 武汉光谷航天三江激光产业技术研究院有限公司 | Single-end pumping airborne pulse laser based on double-crystal serial connection and control method |
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Address after: 325000 No. fourteen, No. 466 Binhai Road, Wenzhou economic and Technological Development Zone, Zhejiang, China Patentee after: ZHEJIANG JIATAI LASER TECHNOLOGY CO., LTD. Address before: Wenzhou high tech Industrial Park in Lucheng District of Zhejiang province 325000 Jiao Feng Road No. 108 Patentee before: ZHEJIANG JIATAI LASER SCIENCE & TECHNOLOGY CO., LTD. |
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Denomination of invention: Double-output end face pumping all-solid-state laser Effective date of registration: 20200325 Granted publication date: 20110601 Pledgee: China Minsheng Banking Corp Wenzhou branch Pledgor: ZHEJIANG JIATAI LASER TECHNOLOGY Co.,Ltd. Registration number: Y2020330000121 |
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