CN101106248A - A permeation rate adjustable laser - Google Patents
A permeation rate adjustable laser Download PDFInfo
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- CN101106248A CN101106248A CNA2006100989103A CN200610098910A CN101106248A CN 101106248 A CN101106248 A CN 101106248A CN A2006100989103 A CNA2006100989103 A CN A2006100989103A CN 200610098910 A CN200610098910 A CN 200610098910A CN 101106248 A CN101106248 A CN 101106248A
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- wave plate
- quarter wave
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Abstract
The invention discloses a laser with transmission rate adjustable, comprising a first holophote equipped on one end of a laser module in the optical path of the laser, and an output mirror unit equipped on the other end of the laser module; the output mirror unit is composed of a polarizer positioned with certain angle with the optical axis of the laser module, a quarter-wave plate equipped on one side of the polarizer and a second holophote. The invention is simple and convenient, and can flexibly adjust the output transmission rate of the laser.
Description
Technical field
The present invention relates to the adjustable laser of a kind of transmitance.
Background technology
The optimum transmission of laser is most important to the design of laser, and it directly influences the maximum power output/energy of laser.If the transmitance choosing is too low, will increase the power density/energy density in the laser cavity chamber, burn out optical element easily, and the bright dipping power/energy is also lower; If the transmitance choosing is too high, the threshold value of laser is raise, the loss in chamber strengthens, and the bright dipping power/energy is also lower.And, the optimum transmission of static bright dipping and transfer Q later on dynamically the optimum transmission of bright dipping have many times that very big difference, especially laser energy are bigger, difference was bigger when repetition rate was relatively hanged down.And obtain by Theoretical Calculation that the method for optimum transmission is general to exist bigger error, as disclosed technology among " Solid-State Laser Engineering " the 5th edition p104 of document 1:W.Koechner.
In the prior art, the technical staff obtains the best percent of pass of laser in engineering and experiment way is after the laser chamber type is determined, the way of the outgoing mirror by changing different transmitances realizes the maximum output of power/energy.But this way is not only time-consuming but also be difficult to accurately, especially not common planar mirror but when certain curvature is arranged at outgoing mirror, be difficult to the outgoing mirror of the ready-made different percent of pass on sale of directly acquisition, like this for the outgoing mirror that obtains different percent of pass go to boil the respectively cost of plated film is huge, expensive time simultaneously.
Because the deficiencies in the prior art, the urgent hope of people can have the adjustable laser output mirror device of a kind of transmitance, is easy to just can obtain best output transmitance like this.
Summary of the invention
The objective of the invention is to overcome the deficiency that computational process is loaded down with trivial details, the optimum transmission error is big, cost is high that the laser outgoing mirror of prior art exists in the selection of optimum transmission, thereby provide a kind of transmitance adjustable laser.
For achieving the above object, the technical solution used in the present invention is as follows:
The laser that a kind of transmitance is adjustable as shown in Figure 1, comprises that first completely reflecting mirror 1 is arranged on an end of the laser module 2 in the laser light path, and outgoing mirror unit 6 is arranged on the other end of laser module 2; It is characterized in that described outgoing mirror unit 6 places the quarter wave plate 4 and second completely reflecting mirror 5 of a side of polarizer 3 to form by a polarizer 3 that has angle and place with the optical axis of described laser module 2.
Further, the plane of described quarter wave plate 4 is vertical with laser optical path.
Further, the angle of the optical axis of the plane of described polarizer 3 and laser module 2 is a Brewster's angle.
Further, described quarter wave plate 4 be mounted in one can support rotatably on, change the direction of its optical axises by rotating described quarter wave plate 4.
Further, described quarter wave plate 4 is positioned at the side near second completely reflecting mirror 5.
Further, described quarter wave plate 4 is positioned at the side near laser module 2.
Further, described quarter wave plate 4 is between the laser module 2 and first completely reflecting mirror 1.
Further, laser is exported from polarizer 3 transmissions.
Further, laser is from polarizer 3 reflection outputs.
Compared with prior art, the invention has the advantages that:
The present invention is simple and convenient; Installation and Debugging are easy; Being convenient to through engineering approaches promotes; Can export transmitance by the flexible laser, realize Best Coupling output.The present invention can various solid state lasers, gas laser, dye laser etc. polytype need to optimize the laser output degree of coupling or need use in the laser of the quantitative or qualitative change output degree of coupling.
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 3;
Fig. 4 represents the device schematic diagram of the embodiment of the invention 4.
Fig. 5 represents the device schematic diagram of the embodiment of the invention 5;
Fig. 6 represents the device schematic diagram of the embodiment of the invention 6;
Fig. 7 represents the device schematic diagram of the embodiment of the invention 7;
Fig. 8 represents the device schematic diagram of the embodiment of the invention 8.
The drawing explanation:
1-first completely reflecting mirror; The 2-laser module;
The 3-polarizer; The 4-1/4 wave plate;
5-second completely reflecting mirror; The adjustable unit of 6-transmitance;
The 7-1/2 wave plate; 8-transfers the Q unit.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
With reference to Fig. 1, make the adjustable laser of transmitance, comprise that first completely reflecting mirror 1 is arranged on an end of the laser module 2 in the laser light path, outgoing mirror unit 6 is arranged on the other end of laser module 2; Outgoing mirror unit 6 places the quarter wave plate 4 and second completely reflecting mirror 5 of a side of polarizer 3 to form by a polarizer 3 that becomes Brewster's angle to place with the optical axis of laser module 2, and quarter wave plate 4 is near second completely reflecting mirror 5.The plane of quarter wave plate 4 is vertical with laser optical path.Quarter wave plate 4 is mounted on the support (not shown) that can rotate, by rotating the direction of described quarter wave plate 4 its optical axises of change.
The material of first completely reflecting mirror 1 is K9 glass or fused quartz, and present embodiment adopts K9 glass, reflectivity is arranged more than or equal to 99.5% deielectric-coating on it, and present embodiment intermediary plasma membrane emissivity is 99.5%.Laser module 2 is made up of operation material and pumping source, the material of operation material is Nd:YAG, doping content elects 1% as, pumping source adopts the continuous krypton lamp pumping, the material of polarizer 3 adopts K9 glass, be coated with corresponding polarization deielectric-coating on it, mean level direction polarization (P polarization) transmitance is more than or equal to 95%, and horizontal direction polarization in the present embodiment (P polarization) transmitance equals 95%; The vertical direction polarized reflectance is more than or equal to 99%, and the vertical direction polarized reflectance equals 99% in the present embodiment, and 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 the second total reflective mirror M2 adopts K9 glass or fused quartz, and reflectivity adopts K9 glass more than or equal to 99.5% in the present embodiment, and emissivity equals 99.5%.
First completely reflecting mirror 1 and second completely reflecting mirror 5 fix by the mirror holder of routine, and its fixed form is well known to those skilled in the art.Laser module 2 is fixed in the laser pump cavity (not shown), for those skilled in the art know.
The step of the device of the foregoing description specifically being adjusted the outgoing mirror transmitance is as follows:
1, make light from first completely reflecting mirror, 1 vertical reflection first completely reflecting mirror 1, laser module 2, polarizer 3, quarter wave plate 4, second completely reflecting mirror, 5 collimations with the He-Ne laser, He-Ne light is through laser module 2, vertical by quarter wave plate 4 after polarizer 3 reflections from the light of laser module 2 outgoing, and vertical reflection returns along former road on second completely reflecting mirror 5; Start power supply and make laser module 2 bright dippings, Effect of Back-Cavity Mirror is transferred to maximum with the bright dipping power/energy before adjusting;
2, a power meter/energy meter is put among Fig. 1 from the light direction position probing luminous power or the energy of the arrow indication of polarizer 3 transmissions, rotation quarter wave plate 4 is transferred to maximum with the bright dipping light intensity;
3, when the primary optical axis direction of quarter wave plate 4 became 45 to spend with the vertical polarization of polarizer 3, transmitance was 100%; When the primary optical axis direction of quarter wave plate 4 became 0 degree or 90 to spend with the vertical polarization of polarizer 3, transmitance was 0.When the primary optical axis direction when quarter wave plate 4 became arbitrarily angled θ to spend with the vertical polarization of polarizer 3, transmitance can be by formula: T=cos (90-2 * θ) calculate.
Because for isotropic working-laser material such as Nd:YAG, to a certain degree depolarization is introduced in the affiliation that adds of polarizer, if correct depolarization, can respectively place a quarter wave plate in the both sides of operation material, and other are constant.
Make the adjustable laser of transmitance as shown in Figure 2, on the basis of embodiment 1, quarter wave plate 4 is moved to a side near laser module 2, other are with embodiment 1.The benefit of doing like this is that the laser light direction is free more, and light direction is consistent with the optical axis direction of laser module 2.
Make the adjustable laser of transmitance as shown in Figure 3, the quarter wave plate among the embodiment 24 is moved between the laser module 2 and first completely reflecting mirror 1, other are with embodiment 2.The laser light direction is consistent with the optical axis direction of laser module 2 in the present embodiment.
Make the adjustable laser of transmitance as shown in Figure 4, first completely reflecting mirror 1 is arranged on an end of the laser module 2 in the laser light path, and outgoing mirror unit 6 is arranged on the other end of laser module 2; Outgoing mirror unit 6 places the quarter wave plate 4 and second completely reflecting mirror 5 of a side of polarizer 3 to form by a polarizer 3 that becomes Brewster's angle to place with the optical axis of laser module 2, and quarter wave plate 4 is near second completely reflecting mirror 5.The plane of quarter wave plate 4 is vertical with laser optical path.Quarter wave plate 4 is mounted on the support (not shown) that can rotate, by rotating the direction of described quarter wave plate 4 its optical axises of change.
As different from Example 1, in the present embodiment, first completely reflecting mirror 1, laser module 2, polarizer 3, quarter wave plate 4, second completely reflecting mirror 5 are on the same straight line optical axis, and other are with embodiment 1.
The quarter wave plate 4 and second completely reflecting mirror 5 are in a side of polarizer 3 in the present embodiment, and laser module 2 is in the opposite side of polarizer 3, and laser goes out from polarizer 3 reflections, and the angle of the optical axis of light direction and laser module 2 is a Brewster's angle.
Make the adjustable laser of transmitance as shown in Figure 5, on the basis of embodiment 4, quarter wave plate 4 is moved to a side near laser module 2, other are with embodiment 4.Laser is from the opposite side reflection that is different from embodiment 4 of polarizer 3 and go out in the present embodiment, and the angle of the optical axis of light direction and laser module 2 is a Brewster's angle.
Make the adjustable laser of transmitance as shown in Figure 6, the quarter wave plate among the embodiment 44 is moved between the laser module 2 and first completely reflecting mirror 1, other are with embodiment 4.Laser goes out from polarizer 3 reflections in the present embodiment, and the angle of the optical axis of light direction and laser module 2 is a Brewster's angle.
Embodiment 1-6 makes the transmitance tunable laser during to the laser of continuous operation or free-running pulse laser, present embodiment is transferred the laser of Q output for needs, as shown in Figure 7 on embodiment 1 basis, also comprise and transferring on the light path that Q unit 8 is arranged between outgoing mirror unit 6 and the laser module 2.
For anisotropic working-laser material such as Nd:YVO
4, as shown in Figure 8,,, adjust its optical axis direction by rotating this 1/2 wave plate 7 comprising also on embodiment 1 basis that 1/2 wave plate 7 is placed on (not shown) on the support that can rotate, the bright dipping light intensity is transferred to maximum.Other are with embodiment 1.
Among the foregoing description 1-8, used pumping source is a continuous krypton lamp, it will be apparent to those skilled in the art that pumping source also can change xenon flash lamp or semiconductor laser (Laser Diode) into.Among the above embodiment, used operation material also can be selected other operation material material for use.
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 (9)
1. the laser that transmitance is adjustable comprises that first completely reflecting mirror (1) is arranged on an end of the laser module (2) in the laser light path, and outgoing mirror unit (6) are arranged on the other end of laser module (2); It is characterized in that described outgoing mirror unit (6) places the quarter wave plate (4) and second completely reflecting mirror (5) composition of a side of polarizer (3) by a polarizer (3) that has angle and place with the optical axis of described laser module (2).
2. according to the adjustable laser of the described transmitance of claim 1, it is characterized in that the plane of described quarter wave plate (4) is vertical with laser optical path.
3. according to the adjustable laser of the described transmitance of claim 1, it is characterized in that the angle of the optical axis of the plane of described polarizer (3) and laser module (2) is a Brewster's angle.
4. according to claim 1, the adjustable laser of 2 or 3 each described transmitances, it is characterized in that, also comprise a runing rest, described quarter wave plate (4) be installed in this can support rotatably on, make quarter wave plate (4) change the direction of optical axis by rotation.
5. according to the adjustable laser of the described transmitance of claim 1, it is characterized in that described quarter wave plate (4) is positioned at the side near second completely reflecting mirror (5).
6. according to the adjustable laser of the described transmitance of claim 1, it is characterized in that described quarter wave plate (4) is positioned at the side near laser module (2).
7. according to the adjustable laser of the described transmitance of claim 1, it is characterized in that described quarter wave plate (4) is positioned between laser module (2) and first completely reflecting mirror (1).
8. according to claim 5 or the adjustable laser of 6 or 7 described transmitances, it is characterized in that described second completely reflecting mirror (5) and described laser module (2) all are in the same side of described polarizer (3), laser is exported from polarizer (3) transmission.
9. according to claim 5 or the adjustable laser of 6 described transmitances, it is characterized in that, described second completely reflecting mirror (5) is in a side of described polarizer (3), and described laser module (2) is in the opposite side of described polarizer (3), and laser is from polarizer (3) reflection output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100989103A CN101106248A (en) | 2006-07-14 | 2006-07-14 | A permeation rate adjustable laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100989103A CN101106248A (en) | 2006-07-14 | 2006-07-14 | A permeation rate adjustable laser |
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| CN101106248A true CN101106248A (en) | 2008-01-16 |
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| CNA2006100989103A Pending CN101106248A (en) | 2006-07-14 | 2006-07-14 | A permeation rate adjustable laser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486434A (en) * | 2010-12-27 | 2012-06-06 | 北京国科世纪激光技术有限公司 | Test system of dynamic transmissivity of lambda/4-voltage electro-optical switch and test method thereof |
| CN102486435A (en) * | 2010-12-27 | 2012-06-06 | 北京国科世纪激光技术有限公司 | System and method for testing dynamic transmissivity of lambda/2 voltage electro-optical switch |
| CN102570278A (en) * | 2012-02-23 | 2012-07-11 | 中国科学院光电研究院 | High-stability output device for periodically-modulated flat-topped pulse |
| CN103594919A (en) * | 2013-11-14 | 2014-02-19 | 中国科学院半导体研究所 | Device capable of improving linear polarization laser output of solid laser |
-
2006
- 2006-07-14 CN CNA2006100989103A patent/CN101106248A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486434A (en) * | 2010-12-27 | 2012-06-06 | 北京国科世纪激光技术有限公司 | Test system of dynamic transmissivity of lambda/4-voltage electro-optical switch and test method thereof |
| CN102486435A (en) * | 2010-12-27 | 2012-06-06 | 北京国科世纪激光技术有限公司 | System and method for testing dynamic transmissivity of lambda/2 voltage electro-optical switch |
| CN102486435B (en) * | 2010-12-27 | 2014-03-12 | 北京国科世纪激光技术有限公司 | System and method for testing dynamic transmissivity of lambda/2 voltage electro-optical switch |
| CN102486434B (en) * | 2010-12-27 | 2014-03-12 | 北京国科世纪激光技术有限公司 | Test system of dynamic transmissivity of lambda/4-voltage electro-optical switch and test method thereof |
| CN102570278A (en) * | 2012-02-23 | 2012-07-11 | 中国科学院光电研究院 | High-stability output device for periodically-modulated flat-topped pulse |
| CN102570278B (en) * | 2012-02-23 | 2014-07-23 | 中国科学院光电研究院 | High-stability output device for periodically-modulated flat-topped pulse |
| CN103594919A (en) * | 2013-11-14 | 2014-02-19 | 中国科学院半导体研究所 | Device capable of improving linear polarization laser output of solid laser |
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Open date: 20080116 |