CN101060227A - A pulse width adjustable laser - Google Patents
A pulse width adjustable laser Download PDFInfo
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- CN101060227A CN101060227A CN 200610075689 CN200610075689A CN101060227A CN 101060227 A CN101060227 A CN 101060227A CN 200610075689 CN200610075689 CN 200610075689 CN 200610075689 A CN200610075689 A CN 200610075689A CN 101060227 A CN101060227 A CN 101060227A
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Abstract
The disclosed laser with adjustable Q pulse width comprises: an output mirror, a laser rod, a Pockel's box together with a first full deflection mirror coaxial arranged on a straight line, a first polaroid between the Pockel's box and first deflection mirror, at least one movable 1/2 glass filter and polaroid (7) between former first polaroid and the first deflection mirror, a second full reflection mirror (11) near the polaroid (7) to deflect all laser from (7) backwardly. This invention is simple and convenient, and can be used in different lasers.
Description
Technical field
The present invention relates to a kind of tunable laser device of laser Q-switching pulsewidth of realizing.
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.
Existing single pulse width laser output can not have been satisfied client's application demand in a lot of occasions.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 device 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 pulsewidth adjustable pulse laser as shown in Figure 1, comprising: outgoing mirror 1, one laser bar, 2, one Pockers cells 4 and one first total reflective mirror 10 coaxially are arranged on the straight line successively in order; It is characterized in that, also be included in and place first polarizer 5 between described Pockers cell 4 and described first total reflective mirror 10, between this first polarizer 5 and described first total reflective mirror 10, place at least one 1/2 wave plate 6 and at least one polarizer 7 successively again, side at described polarizer 7 is provided with second total reflective mirror 11, and this second total reflective mirror 11 is used for described polarizer 7 laser light reflected are all reflected back along former road; Described 1/2 wave plate is movable, can shift out or insert in the light path.
In technique scheme, the plane of described 1/2 wave plate is vertical with laser optical path.
In technique scheme, the polarization direction of all described polarizers is parallel, the optical axis of all described 1/2 wave plates and the polarization direction of polarizer angle at 45.
In technique scheme, the plane of all described polarizers 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 is removed.
In technique scheme, this laser aid comprises that also one the 2 1/2 wave plate 8 and the 3rd polarizer 9 are placed between described at least one 1/2 wave plate 6, described at least one polarizer 7 and the described total reflective mirror 10, described the 2 1/2 wave plate 8 is can be rotatably, thereby changes the direction of its optical axis.
Compared with prior art, the invention has the advantages that:
Simple and convenient; Installation and Debugging are easy; Being convenient to through engineering approaches 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 2;
Fig. 3 represents the device schematic diagram of the embodiment of the invention 4;
Fig. 4 represents the device schematic diagram of the embodiment of the invention 5;
Fig. 5 represents the device schematic diagram of the embodiment of the invention 7.
The drawing explanation:
1 expression outgoing mirror; 2 expression laser bars;
3 expression quarter wave plates; 4 expression Pockers cells;
5 expressions, first polarizer; 6 expressions the one 1/2 wave plate;
7 expressions, second polarizer; 8 expressions the 2 1/2 wave plate;
9 expressions the 3rd polarizer; 10 expressions, first total reflective mirror;
11 expressions, second total reflective mirror; 13 expressions the 3 1/2 wave plate;
14 expressions the 4th polarizer; 15 expressions the 3rd total reflective mirror.
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, first polarizer 5, the one 1/2 wave plate 6, the second polarizers 7, the 3 1/2 wave plates 13, the 4th polarizer 14, first total reflective mirror, 10, the second total reflective mirrors, 11, the three total reflective mirrors 15.Side at described polarizer 7 is provided with second total reflective mirror 11, and this second total reflective mirror 11 is used for described polarizer 7 laser light reflected are all reflected back along former road; Described 1/2 wave plate is movable, can shift out or insert in the light path.The plane of described 1/2 wave plate is vertical with laser optical path.The polarization direction of all described polarizers is parallel, the optical axis of all described 1/2 wave plates and the polarization direction of polarizer angle at 45.The plane of all described polarizers and the angle of laser optical axis are Brewster's angle.
By the insertion of controlling the one 1/2 wave plate 6 and the 3 1/2 wave plate 13 and the switching that is shifted out the long and long chamber of realization short cavity length.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, the one 1/2 wave plate 6 is inserted, the 3 1/2 wave plate 13 shifts out; When needs output long pulse, the 3 1/2 wave plate 13 is inserted, the one 1/2 wave plate 6 shifts out; When needs are exported longer pulse, the 3 1/2 wave plate 13 is shifted out, the one 1/2 wave plate 6 shifts out; When the light impulse length of needs output is between above-mentioned short pulse and above-mentioned long pulse, the 3 1/2 wave plate 13 is inserted, the one 1/2 wave plate 6 shifts out, and realizes the adjustable continuously of pulsewidth by injection energy that reduces laser bar or the time-delay that changes between pumping lamp, the Q-modulating device again.When the light impulse length of needs output is at above-mentioned long pulse and more between the long pulse, the 3 1/2 wave plate 13 is shifted out, the one 1/2 wave plate 6 shifts out, and realizes the adjustable continuously of pulsewidth by the time-delay that reduces to inject energy or change between lamp, the Q simultaneously.And to realize that in a big way pulsewidth is adjustable, can be in chamber combinations of inserting several groups 1/2 wave plates and polarizer, the combination that this combination forms as the one 1/2 wave plate 6 among Fig. 1 and second polarizer 7 more.Shifting out and inserting of above-mentioned all 1/2 wave plates can be adopted manual operation or electric operating, and perhaps by means of some carriages, but all to require be that translation is inserted and shifted out, and this is easy to realize to those skilled in the art.
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:
As Fig. 2, in resonant cavity, insert one group of 1/2 wave plate 8 and polarizer 9,1/2 wave plates 8 again and can rotate.When light pulse is vibrated,, can realize the pulse-width regulated of certain limit by rotating 1/2 wave plate 8 in the resonant cavity by speculum 15 or 11 decisions.Realize that rotation 1/2 wave plate 8 can be by manual or electronic mode, this accomplishes for those skilled in the art easily.Other are with embodiment 1.
Embodiment 3:
Embodiment 4:
As shown in Figure 3, present embodiment adopts cavity dumping output, can realize that pulsewidth is adjustable in shorter pulsewidth scope, and wherein the outgoing mirror 1 among the embodiment 1 changes high reflective mirror into, and laser pulse is gone out by first polarizer, 5 turned letters.Other are with embodiment 1.
Embodiment 5:
As shown in Figure 4, present embodiment adopts other to transfer the Q mode, as passive Q-adjusted or acousto-optic Q modulation or rotation accent Q.Quarter wave plate among the embodiment 13 and Pockers cell 4 are removed, change passive Q-switch or acoustooptic Q-switching into.Other are with embodiment 1.
Embodiment 6:
As Fig. 1, change all polarizers into polarization splitting prism, other are with embodiment 1.
Embodiment 7:
As shown in Figure 5, come exciting laser rod 2 with the pumping lamp (not shown), under the situation of not considering laser output energy and laser parameters variations such as Output mode, the angle of divergence, change and only pursue laser pulse width, can realize the adjustable continuously of pulsewidth by injection energy that changes laser bar or the time-delay that changes between pumping lamp, the Q-modulating device 4.
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 (8)
1, the adjustable laser of a kind of pulsewidth comprises: an outgoing mirror (1), and a laser bar (2), a Pockers cell (4) and one first total reflective mirror (10) coaxially are arranged on the straight line successively in order; It is characterized in that, also be included in and place first polarizer (5) between described Pockers cell (4) and described first total reflective mirror (10), between this first polarizer (5) and described first total reflective mirror (10), place at least one 1/2 wave plate (6) and another polarizer (7) at least successively again, side at this polarizer (7) is provided with second total reflective mirror (11), and this second total reflective mirror (11) is used for described polarizer (7) laser light reflected is all reflected back along former road; Described 1/2 wave plate is movable, can shift out or insert in the light path.
2, according to the adjustable laser of the described pulsewidth of claim 1, it is characterized in that the plane of described 1/2 wave plate is vertical with laser optical path.
3, according to claim 1 or the adjustable laser of 2 described pulsewidths, it is characterized in that the polarization direction of all described polarizers is parallel, the optical axis of all described 1/2 wave plates and the polarization direction of polarizer angle at 45.
According to the adjustable laser of the described pulsewidth of claim 3, it is characterized in that 4, the plane of all described polarizers and the angle of laser optical axis are Brewster's angle.
According to the adjustable laser of the described pulsewidth of claim 1, it is characterized in that 5, described Pockers cell (4) is that boost type is electric-optically Q-switched, this laser comprises that also a quarter wave plate (3) is placed between described laser bar (2) and the described Pockers cell (4).
6, according to the adjustable laser of the described pulsewidth of claim 1, it is characterized in that, when this laser adopts 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 described Pockers cell (4), and described quarter wave plate is removed.
7, according to the adjustable laser of the described pulsewidth of claim 1, it is characterized in that, this laser aid comprises that also one the 2 1/2 wave plate (8) and the 3rd polarizer (9) are placed between described at least one 1/2 wave plate (6), described another polarizer at least (7) and the described total reflective mirror (10), and described the 2 1/2 wave plate (8) is can be rotatably.
8, the adjustable laser of a kind of pulsewidth, comprise: an outgoing mirror (1), a laser bar (2), a quarter wave plate (3), one Pockers cell (4) and one first total reflective mirror (10) coaxially are arranged on the straight line successively in order, and one is used to encourage the pumping lamp of described laser bar (2); It is characterized in that, also be included in and place first polarizer (5) between described Pockers cell (4) and described first total reflective mirror (10), by injection energy that changes laser bar or the continuous adjusting that changes the time-delay realization pulsewidth between pumping lamp and the Q-modulating device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610075689XA CN100470965C (en) | 2006-04-18 | 2006-04-18 | A pulse width adjustable laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610075689XA CN100470965C (en) | 2006-04-18 | 2006-04-18 | A pulse width adjustable laser |
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| CN101060227A true CN101060227A (en) | 2007-10-24 |
| CN100470965C CN100470965C (en) | 2009-03-18 |
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| CNB200610075689XA Expired - Fee Related CN100470965C (en) | 2006-04-18 | 2006-04-18 | A pulse width adjustable laser |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570271A (en) * | 2012-01-13 | 2012-07-11 | 北京国科世纪激光技术有限公司 | Period-modulated flat-topped pulse device for accurately controlling output power/energy |
| CN105896259A (en) * | 2014-12-03 | 2016-08-24 | 杜金波 | Q-switch Nd:YAG laser pulse width narrowing technology |
| CN107681422A (en) * | 2017-11-23 | 2018-02-09 | 沈阳理工大学 | A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers |
| CN108923241A (en) * | 2018-07-25 | 2018-11-30 | 长春理工大学 | A kind of passive Q-regulaitng laser based on polarized combination laser gain |
| 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 |
| CN108988117A (en) * | 2018-07-25 | 2018-12-11 | 长春理工大学 | A kind of laser amplifier based on polarized combination laser gain |
| 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 |
| CN110006828A (en) * | 2019-04-26 | 2019-07-12 | 哈尔滨工业大学 | A kind of device and method improving optoacoustic spectroscopy trace-gas sensors performance |
| CN110120625A (en) * | 2017-05-31 | 2019-08-13 | 华中科技大学 | A kind of laser amplification method and solid laser amplifier based on disk crystal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872181A (en) * | 1988-11-21 | 1989-10-03 | Spectra-Physics | Laser resonator with laser medium exhibiting thermally induced birefringence |
-
2006
- 2006-04-18 CN CNB200610075689XA patent/CN100470965C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570271B (en) * | 2012-01-13 | 2014-10-01 | 北京国科世纪激光技术有限公司 | Period-modulated flat-topped pulse device for accurately controlling output power/energy |
| CN102570271A (en) * | 2012-01-13 | 2012-07-11 | 北京国科世纪激光技术有限公司 | Period-modulated flat-topped pulse device for accurately controlling output power/energy |
| CN105896259A (en) * | 2014-12-03 | 2016-08-24 | 杜金波 | Q-switch Nd:YAG laser pulse width narrowing technology |
| CN105896259B (en) * | 2014-12-03 | 2019-07-02 | 杜金波 | Q-switch Nd:YAG laser pulse width narrows technology |
| 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 |
| CN110120625A (en) * | 2017-05-31 | 2019-08-13 | 华中科技大学 | A kind of laser amplification method and solid laser amplifier based on disk crystal |
| CN110120625B (en) * | 2017-05-31 | 2020-07-10 | 华中科技大学 | Laser amplification method based on disc crystal and solid laser amplifier |
| CN107681422A (en) * | 2017-11-23 | 2018-02-09 | 沈阳理工大学 | A kind of adjustable Nd of pulsewidth nano-seconds:YAG solid state lasers |
| CN107681422B (en) * | 2017-11-23 | 2024-02-06 | 沈阳理工大学 | Nd-YAG solid laser with adjustable pulse width in nanosecond range |
| CN108988117A (en) * | 2018-07-25 | 2018-12-11 | 长春理工大学 | A kind of laser amplifier based on polarized combination laser gain |
| CN108923241A (en) * | 2018-07-25 | 2018-11-30 | 长春理工大学 | A kind of passive Q-regulaitng laser based on polarized combination laser gain |
| 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 |
| 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 |
| CN110006828A (en) * | 2019-04-26 | 2019-07-12 | 哈尔滨工业大学 | A kind of device and method improving optoacoustic spectroscopy trace-gas sensors performance |
| CN110006828B (en) * | 2019-04-26 | 2021-04-23 | 哈尔滨工业大学 | Device and method for improving performance of photoacoustic spectroscopy trace gas sensor |
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| Publication number | Publication date |
|---|---|
| CN100470965C (en) | 2009-03-18 |
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