CN101090193A - Laser capable of regulating pulsewidth - Google Patents
Laser capable of regulating pulsewidth Download PDFInfo
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- CN101090193A CN101090193A CN 200610087131 CN200610087131A CN101090193A CN 101090193 A CN101090193 A CN 101090193A CN 200610087131 CN200610087131 CN 200610087131 CN 200610087131 A CN200610087131 A CN 200610087131A CN 101090193 A CN101090193 A CN 101090193A
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- pockers cell
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Abstract
This invention discloses a laser realizing tuning of Q-switched pulse width including: an output mirror, a laser rod, a Pockels cell, a polaroid and a totally reflecting mirror set orderly on a same line in co-optical axis, a pump source for pumping said laser rod, a moving desk for the mounting the totally reflecting mirror to move it to-and-fro along the optical axis and alter length of a laser cavity.
Description
Technical field
The present invention relates to the pulse laser technology, the tunable laser of particularly a kind of realization laser Q-switching pulsewidth.
Background technology
Along with developing rapidly of laser technology, laser technology is more and more huger in the every field role, joins the army that it is civilian to use, from the scientific research to the teaching, and various fields such as from industry to the agricultural avocation.And meanwhile, in engineering is used, but also more and more higher to the reliability of laser, through engineering approaches, stability assembly type, multifunctionality, easy to operate requirement.
The laser output of existing single pulsewidth can not be satisfied application demand under many circumstances.Realize that at present the scheme that pulsewidth can be coordinated mainly is to realize by chopping switch outside laserresonator, the tunable scheme of this pulsewidth has some deficiency: at first, this scheme can only be implemented under the prerequisite of original laserresonator output pulse width, to short pulse duration copped wave and can not be to the copped wave of long pulse cross direction, be that pulsewidth can only shorten, can not be elongated; Secondly, copped wave is that cost obtains with the huge waste of energy, for example, realize becoming 5 nanosecond pulses output from the resonant cavity pulse output of 50 nanoseconds, will waste 10 times energy, and this part energy is to reflex in the receiving system in the chamber, like this when doing the copped wave of high-power or macro-energy by polarizer, also may make receiving system be played ash or receiving system extremely is heated, influence the stable of complete machine by the light laser of macro-energy; Have again, the effect of copped wave depends on the Pockers cell driving power to a great extent, this power supply not only will be realized with the time-delay of oscillator stage output pulse synchronous, but also the speed that will guarantee rising edge and trailing edge is enough fast, thereby improved the complexity of complete machine to a great extent, reduce reliability, and increased cost.
In addition, prior art also can realize by the SBS pond for pulse width-tuned, as disclosed technical scheme in " utility model patent number: 95212767.9; patent name: pulsewidth is tunable YAG laser ", but this scheme is to realize pulse width-tuned by mobile distance with the SBS pond, be unfavorable for through engineering approaches, and this scheme is turned in resonant cavity by the amplification light that reflects, thereby the laser bar of oscillator stage and amplifying stage and the plated film level of each optical element are had relatively high expectations, otherwise cause self-excitation easily; And this scheme realizes laser output by quarter wave plate and devating prism, when macro-energy or high power work, the laser bar depolarization of oscillator stage and amplifying stage can compare seriously, thereby the light that makes amplification has quite a few can not be poured out outside the chamber, interference oscillatory level, destruction work pulse stable.
At the deficiencies in the prior art, people just wish to have a kind of tunable laser of laser Q-switching pulsewidth of realizing.
Summary of the invention
The objective of the invention is to overcome in the prior art with Q-switched laser and add shortcomings such as cost height, the loss of chopping switch structure is big, energy dissipation is serious, thus provide a kind of simple and convenient, Installation and Debugging easily, be convenient to the pulsewidth adjustable pulse laser that through engineering approaches is promoted.
In order to achieve the above object, the present invention takes following technical scheme.
A kind of laser that can regulate pulsewidth, comprise: an outgoing mirror (1), one laser bar (2), a Pockers cell (4) one polarizers (5) and a total reflective mirror (6) successively in order common optical axis ground the one pumping source (not shown) that is used for the described laser bar of pumping (2) is set in a straight line; It is characterized in that also comprise and move platform (7), described total reflective mirror (6) is installed in described moving on the platform, can move forward and backward total reflective mirror (6) along optical axis, it is long to change laser cavity.
In technique scheme, the plane of described polarizer and the angle of laser optical axis are Brewster's angle.
In technique scheme, for the electric-optically Q-switched described Pockers cell 4 of boost type, this laser aid comprises that also a quarter wave plate 3 is placed between described laser bar 2 and the described Pockers cell 4.
In technique scheme, adopt passive Q-adjusted or acousto-optic Q modulation or when rotating Q-modulating device, put into passive Q-adjusted or acousto-optic Q modulation or rotate Q-modulating device, replace above-mentioned Pockers cell 4, and described quarter wave plate (3) and polarizer (5) are removed.
Compared with prior art, the invention has the advantages that:
The present invention is simple and convenient, and Installation and Debugging are easy, is convenient to through engineering approaches and promotes, can the flexible pulsewidth; The present invention can use in adjustable Q-switched laser of pulsewidth or the cavity-dumping laser in polytype needs such as various solid state lasers, gas laser, dye lasers.
Description of drawings
Fig. 1 represents the device schematic diagram of the embodiment of the invention 1;
Fig. 2 represents the device schematic diagram of the embodiment of the invention 5;
The drawing explanation:
The 1--outgoing mirror; The 2--laser bar;
The 3--1/4 wave plate;
The 4--Pockers cell;
The 5--polarizer; The 6--total reflective mirror;
7--moves platform 9--passive Q-switch or acoustooptic Q-switching
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
With reference to Fig. 1, make electric-optically Q-switched pulsewidth tunable laser, comprise outgoing mirror 1, laser bar 2, quarter wave plate 3, the Pockers cell 4 that boost type is electric-optically Q-switched, polarizer 5, total reflective mirror 6 moves the pumping source that platform 7, is used for exciting laser rod 2.The polarization direction of described polarizer 5 is levels, and the plane of described polarizer 5 and the angle of laser optical axis are Brewster's angle.
The material of outgoing mirror 1 is K9 glass or fused quartz, is coated with the deielectric-coating of certain transmitance, such as transmitance T=90%.The material of laser bar 2 is Nd:YAG, and doping content elects 1% as.The Pockers cell 4 that boost type is electric-optically Q-switched material be KD
*The P crystal also can be selected KDP or other adjusting Q crystals for use, and the diameter that size only need be slightly larger than laser crystal bar gets final product, and selects KD in the present embodiment for use
*The P crystal.The material of polarizer 5 adopts K9 glass, be coated with corresponding polarization deielectric-coating on it, mean level direction polarization (P polarization) transmitance is greater than 95%, the vertical direction polarized reflectance is greater than 99%, the manufacturing technology of polarizer is that those skilled in the art know, the polarizer that adopts market to sell in the present embodiment.The material of total reflective mirror 6 adopts K9 glass or fused quartz, and reflectivity is greater than 99.5%.
Move the electromigration platform that platform 7 adopts market to sell, the technical staff can select the electromigration platform of relevant parameter according to the needs of actual shift motion, such as stroke 300mm, and mesa dimensions 160 * 160mm, 5 microns of repetitive positioning accuracies.Described total reflective mirror 6 is fixed on described moving on the platform 7, and fixed form is well known to those skilled in the art.In the present embodiment, be used for the pumping source of exciting laser rod 2 to adopt single xenon flash lamp pumping pottery chamber, also can select other forms of pumping source for use certainly.
Operate the electromigration platform by known methods, control total reflective mirror 6 is realized the conversion of the long length in chamber along the optical axis start.Because the length of resonant cavity is the key factor that influences laser pulse width, so change the long change that just can realize laser pulse width in chamber.When needs output short pulse, make total reflective mirror 6 starts to the position close apart from outgoing mirror 1; When needs output long pulse, the position far away apart from outgoing mirror arrived in total reflective mirror 6 starts.
Present embodiment is simple in structure, and cost is low, and is easy to operate, reliable, is beneficial to the popularization of through engineering approaches.Satisfy fields such as scientific research, medical treatment, crystal test, laser processing to the continuously adjustable requirement of laser pulse width on can be largely.
Embodiment 2:
Total reflective mirror 6 is replaced to prism of corner cube, and it is that those skilled in the art are adequate that prism of corner cube is applied in the laser cavity, and other are with embodiment 1.Disclosed as document " light laser and the particle beams, 16 the 8th phases of volume, " characteristics of cube-corner prism laser resonator " ", advantage such as prism of corner cube has from calm, exempts from debugging, and the preventing mismatching ability is strong.Advantages such as therefore, the laser of present embodiment has from calm, exempts from debugging, and the preventing mismatching ability is strong.Operate the electromigration platform by known methods, the pilot angle cone prism is realized the conversion of the long length in chamber along the optical axis start.Because the length of resonant cavity is the key factor that influences laser pulse width, so change the long change that just can realize laser pulse width in chamber.When needs output short pulse, make prism of corner cube move to the position close apart from outgoing mirror 1; When needs output long pulse, prism of corner cube is moved to the position far away apart from outgoing mirror.
Embodiment 3:
Embodiment 4:
Present embodiment adopts cavity dumping output, can realize that pulsewidth is adjustable in shorter pulsewidth scope, wherein the outgoing mirror among the embodiment 11 is replaced to total reflective mirror, and laser pulse is gone out by polarizer 5 turned letters, and other are with embodiment 1.
Embodiment 5:
As shown in Figure 2, present embodiment adopts passive Q-adjusted or acousto-optic Q modulation or tilting mirror accent Q mode, and quarter wave plate among the embodiment 13 and Pockers cell 4 are removed, and replaces to passive Q-switch or acoustooptic Q-switching 9.Other are with embodiment 1.
Embodiment 6:
As Fig. 1, change polarizer 5 into polarization splitting prism, other are with embodiment 1.
It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1, a kind of laser that can regulate pulsewidth comprises: an outgoing mirror (1), a laser bar (2), a Pockers cell (4) one polarizers (5) and a total reflective mirror (6) successively in order common optical axis ground be provided with point-blank; It is characterized in that also comprise and move platform (7), described total reflective mirror (6) is installed in described moving on the platform, can vertically moving described total reflective mirror (6) along optical axis, to change laser chamber long.
According to the described laser that can regulate pulsewidth of claim 1, it is characterized in that 2, the plane of described polarizer (5) and the angle of laser beam axis are Brewster's angle.
According to claim 1 or the 2 described lasers that can regulate pulsewidth, it is characterized in that 3, described Pockers cell (4) is the electric-optically Q-switched Pockers cell of boost type; Comprise that also a quarter wave plate (3) is arranged between described laser bar (2) and the described Pockers cell (4).
4, according to the described laser that can regulate pulsewidth of claim 1, it is characterized in that, with passive Q-adjusted or acousto-optic Q modulation or rotate Q-modulating device and replace described Pockers cell 4, and described polarizer (5) is removed.
5, according to the described laser that can regulate pulsewidth of claim 1, it is characterized in that, replace described total reflective mirror (6) with prism of corner cube.
6, according to claim 1 or the 5 described lasers that can regulate pulsewidth, it is characterized in that, replace described polarizer (5) with polarization splitting prism.
7, according to claim 1 or the 5 described lasers that can regulate pulsewidth, it is characterized in that, replace described outgoing mirror (1) with a high reflective mirror, laser pulse is gone out by described polarizer (5) turned letter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610087131 CN101090193A (en) | 2006-06-13 | 2006-06-13 | Laser capable of regulating pulsewidth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610087131 CN101090193A (en) | 2006-06-13 | 2006-06-13 | Laser capable of regulating pulsewidth |
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| CN101090193A true CN101090193A (en) | 2007-12-19 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579427A (en) * | 2017-09-30 | 2018-01-12 | 西安卓镭激光技术有限公司 | A kind of method and laser for producing different laser pulse widths |
| CN108448375A (en) * | 2018-04-27 | 2018-08-24 | 国科世纪激光技术（天津）有限公司 | Fixed pulse width intracavity frequency doubling green (light) laser and operating method |
| CN108526711A (en) * | 2018-03-29 | 2018-09-14 | 歌尔股份有限公司 | A method of improving the cutting of nanosecond pulse width ultraviolet laser |
| CN108963746A (en) * | 2017-05-24 | 2018-12-07 | 中国科学院理化技术研究所 | Laser using method, pulse width adjustable laser and using method thereof |
| CN109494560A (en) * | 2018-11-26 | 2019-03-19 | 中国科学院理化技术研究所 | Pulse width discrete adjustable Q-switched laser |
| CN109510059A (en) * | 2018-11-26 | 2019-03-22 | 中国科学院理化技术研究所 | Q-switched laser for outputting long pulse |
| CN115621827A (en) * | 2022-12-02 | 2023-01-17 | 中国电子科技集团公司第十一研究所 | Large dynamic range output light beam quality maintaining anti-detuning laser |
-
2006
- 2006-06-13 CN CN 200610087131 patent/CN101090193A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963746A (en) * | 2017-05-24 | 2018-12-07 | 中国科学院理化技术研究所 | Laser using method, pulse width adjustable laser and using method thereof |
| CN107579427A (en) * | 2017-09-30 | 2018-01-12 | 西安卓镭激光技术有限公司 | A kind of method and laser for producing different laser pulse widths |
| CN107579427B (en) * | 2017-09-30 | 2021-01-26 | 西安卓镭激光技术有限公司 | Method for generating different laser pulse widths and laser |
| CN108526711A (en) * | 2018-03-29 | 2018-09-14 | 歌尔股份有限公司 | A method of improving the cutting of nanosecond pulse width ultraviolet laser |
| CN108526711B (en) * | 2018-03-29 | 2020-01-10 | 歌尔股份有限公司 | Method for improving nanosecond pulse width ultraviolet laser cutting |
| CN108448375A (en) * | 2018-04-27 | 2018-08-24 | 国科世纪激光技术（天津）有限公司 | Fixed pulse width intracavity frequency doubling green (light) laser and operating method |
| CN109494560A (en) * | 2018-11-26 | 2019-03-19 | 中国科学院理化技术研究所 | Pulse width discrete adjustable Q-switched laser |
| CN109510059A (en) * | 2018-11-26 | 2019-03-22 | 中国科学院理化技术研究所 | Q-switched laser for outputting long pulse |
| CN109494560B (en) * | 2018-11-26 | 2019-10-15 | 中国科学院理化技术研究所 | Pulse width discrete adjustable Q-switched laser |
| CN109510059B (en) * | 2018-11-26 | 2019-11-15 | 中国科学院理化技术研究所 | Q-switched laser for outputting long pulse |
| CN115621827A (en) * | 2022-12-02 | 2023-01-17 | 中国电子科技集团公司第十一研究所 | Large dynamic range output light beam quality maintaining anti-detuning laser |
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Open date: 20071219 |