CN103500918A - Multi-channel acousto-optic Q-Switch - Google Patents
Multi-channel acousto-optic Q-Switch Download PDFInfo
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- CN103500918A CN103500918A CN201310494403.1A CN201310494403A CN103500918A CN 103500918 A CN103500918 A CN 103500918A CN 201310494403 A CN201310494403 A CN 201310494403A CN 103500918 A CN103500918 A CN 103500918A
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Abstract
The invention discloses a multi-channel acousto-optic Q-Switch. An acousto-optic medium is mounted in the mounting cavity of a base, two bonding layers are mounted on the two sound-transmitting surfaces of the acousto-optic medium, and are respectively provided with transducers, wherein at least one bonding layer is provided with two or more transducers, surface electrodes are respectively mounted on all the transducers, and are respectively electrically connected with a corresponding matching network, and the matching networks are then respectively connected with a corresponding high-frequency socket on the base. The point of intersection between the ultrasonic wave generated by any one of the transducers on one bonding layer and the ultrasonic wave generated by any one of the transducers on the other bonding layer is in the acousto-optic medium. Since the transducers are respectively produced on the two orthogonal sound-transmitting surfaces of the acousto-optic medium, two-dimensional diffractions can be generated at a plurality of positions. When an antireflection film at a certain position is broken by high-power laser, the laser can be switched to another position, and thereby the service life of the product can be prolonged.
Description
Technical field
The present invention relates to acoustooptic Q-switching, especially a kind of Q switching of the multi-channel sound and light for high laser power device, belong to field of optical device technology.
Background technology
Acoustooptic Q-switching has been widely used in laser, to work the critical component of adjusting the Q effect in laser cavity, it can be promptly adjusts continuous laser Q become the high power pulsed laser of required frequency, has that diffraction efficiency is high, strong turn-off capacity, insertion loss is little, repetition rate is high, control is convenient, the characteristics such as stable and reliable for performance.Acoustooptic Q-switching commonly used is all to adopt the one dimension design, on a logical sound face, makes a transducer, and the diffraction efficiency of this acoustooptic Q-switching, usually less than 90%, is difficult to meet the demand of the laser that some power densities are very high.
In order to improve the diffraction efficiency of acoustooptic Q-switching, people have invented the Two Dimensional Acoustooptic Q Switch, it is to make respectively transducer on two faces mutually orthogonal at same acousto-optic medium, during use, radiofrequency signal is transferred on two transducer table electrodes simultaneously, two transducers are converted into ultrasonic wave to the radiofrequency signal absorbed and are transferred in the acoustic optic interaction medium simultaneously, form mutually orthogonal refractive-index grating in medium.Acoustic optic interaction occurs in incident light and mutually orthogonal refractive-index grating simultaneously, produces the bidimensional diffraction light, so just can reach the purpose of raising diffraction efficiency.For example, the diffraction efficiency of a transducer is 90%, and the diffraction efficiency that two transducers are worked simultaneously so can reach 99%.
Because this Two Dimensional Acoustooptic Q Switch only has two mutually orthogonal transducers, therefore only have a position can realize the bidimensional diffraction, will cause product rejection and can't use when high power laser light breaks the anti-reflection film of this position, seriously reducing the life-span of product.
Summary of the invention
For existing the Two Dimensional Acoustooptic Q Switch, only have a position can realize the deficiency of bidimensional diffraction, the purpose of this invention is to provide a kind of multi-channel sound and light Q switching that has a plurality of positions to realize the bidimensional diffraction.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of multi-channel sound and light Q switching, comprise base, this base is provided with the installation cavity of opening, in this installation cavity, acousto-optic medium is installed, this acousto-optic medium has two logical sound face and sound absorption faces, and the angle of two logical sound faces is 90 ° ± 2 °, on two logical sound faces, bonded layer all is installed, be respectively arranged with solder joint on bonded layer, two solder joints respectively be arranged on base on corresponding screw conduct; Be respectively equipped with transducer on two bonded layers, wherein the transducer at least one bonded layer is two or more that work alone, be separately installed with the table electrode on all transducers, the table electrode is electrically connected to one by one with corresponding matching network, and matching network connects with high-frequency socket corresponding on base respectively more one by one; Transducer on two bonded layers meets following position relationship: hyperacoustic intersection point that on the ultrasonic wave that on one of them bonded layer, any one transducer produces and another bonded layer, any one transducer produces is in acousto-optic medium.
As a preferred version, the transducer on described two bonded layers is two.
Be provided with some grooves on the sidewall of floor installation chamber, on acousto-optic medium all transducer and solder joint all with groove one to one mode be positioned at groove.
Described solder joint is less than 10mm with the distance between corresponding screw, and is less than the electric conducting state of 0.1 ohm in resistance.
The sound absorption surface roughness Ra of described acousto-optic medium is greater than 0.1; Potsherd is installed on the sound absorption face of acousto-optic medium, and on this potsherd, laminating is equipped with the correcting block that is positioned at described installation cavity, and the material of this correcting block is quartz crystal or monocrystalline silicon.
Compared to existing technology, the present invention has following beneficial effect:
1, owing on two logical sound faces (X face and Y face) mutually orthogonal at acousto-optic medium, making respectively a plurality of transducers, so just there are a plurality of positions can produce the bidimensional diffraction.When high power laser light breaks the anti-reflection film of certain position, laser is changed to another position just passable, so just can reach and improve the product purpose in useful life.
For example, on two mutually orthogonal logical sound faces, make respectively two transducers, so just have 4 positions can produce the bidimensional diffraction, like this useful life of product be exactly before 4 times of product.
2, for transducer and solder joint, groove is set respectively on base, and is filled with heat-conducting glue in groove, the thermal conductivity of heat-conducting glue is greater than 0.8W/m-K, the heat of transducer and solder joint generation can be scattered like this, avoids heat to concentrate and burns out transducer.Groove is set has also increased the contact area of acousto-optic medium and base, is conducive to the transmission of heat, reduces the temperature of two transducers.
3, the sound absorption face of acousto-optic medium has passed through the texturing processing, glue pasted with ceramic veneer sheet easy to use.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
The structural representation that Fig. 2 is base;
The mounting structure schematic diagram that Fig. 3 is correcting block and acousto-optic medium.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
As shown in figures 1 and 3, multi-channel sound and light Q switching of the present invention, comprise base 1, this base 1 is provided with the installation cavity of opening, acousto-optic medium 33 is installed in this installation cavity, and this acousto-optic medium 33 has two logical sound faces, on the first logical sound face, the first bonded layer 8 is installed, be provided with the first solder joint 10 on this first bonded layer 8, described the first solder joint 10 conducts with the first screw 11 be arranged on described base 1.Also be provided with the first transducer 2 and the second transducer 5 on described the first bonded layer 8, be separately installed with the first table electrode 4 and the second table electrode 7 on this first transducer 2 and the second transducer 5, described the first table electrode 4 and the second table electrode 7 are electrically connected to the first matching network 16 and the second matching network 15 respectively, and described the first matching network 16 also is connected respectively with the second matching network 15 the first high-frequency socket 17 and the first high-frequency socket 18 be positioned on described base.On the second logical sound face of described acousto-optic medium 33, the second bonded layer 32 is installed, is provided with the second solder joint 24, the second solder joints 24 on this second bonded layer 32 and conducts with the second screw 23 be arranged on described base.Also be provided with the 3rd transducer 26 and the 4th transducer 31 on described the second bonded layer 32, be separately installed with the 3rd table electrode 27 and the 4th table electrode 29 on the 3rd transducer 26 and the 4th transducer 31, described the 3rd table electrode 27 and the 4th table electrode 29 are electrically connected to the 3rd matching network 21 and the 4th matching network 22 respectively, and described the 3rd matching network 21 also is connected respectively with the 4th matching network 22 third high frequency socket 19 and the 4th high-frequency socket 20 be positioned on described base 1.
On the sound absorption face 12 of acousto-optic medium 33, use glue to be pasted with potsherd 13, on this potsherd, laminating is equipped with the correcting block 14 that is positioned at installation cavity.More firm for potsherd 13 is pasted on sound absorption face 12, the sound absorption face 12 of acousto-optic medium 33 has passed through the texturing processing makes it coarse, and its roughness is Ra, Ra>0.1.
During work, need two radiofrequency signals to input this multi-channel sound and light Q switching simultaneously.Any one input from the first high-frequency socket 17 or the second high-frequency socket 18 of the first radiofrequency signal, suppose from the first high-frequency socket 17 inputs, radiofrequency signal is transferred on the first table electrode 4 through the first matching network 16 respectively so, the first transducer 2 is converted to ultrasonic transmission to the interior formation refractive-index grating of acousto-optic medium 33 by radiofrequency signal, through incident light and the refractive-index grating generation acoustic optic interaction of acousto-optic medium 33, produce diffraction light.Any one input from third high frequency socket 19 and the 4th high-frequency socket 20 of the second radiofrequency signal, suppose from third high socket 19 inputs frequently, radiofrequency signal is transferred on the 3rd table electrode 27 through the 3rd matching network 21 respectively so, the 3rd transducer 26 is converted to ultrasonic transmission to the interior formation refractive-index grating of acousto-optic medium 33 by radiofrequency signal, through incident light and the refractive-index grating generation acoustic optic interaction of acousto-optic medium 33, produce diffraction light.The intersection point of ultrasonic wave in acousto-optic medium 33 that the ultrasonic wave that the first transducer 2 produces and the 3rd transducer 26 produce is the D point, the ultrasonic wave generation acoustic optic interaction that the incident light of ordering through acousto-optic medium 33D like this produces with regard to while and the first transducer 2 and the 3rd transducer 26, produce the bidimensional diffraction light, thereby reach the purpose that improves diffraction efficiency.For example, the diffraction efficiency of a transducer is 90%, and the diffraction efficiency that two transducers are worked simultaneously so can reach 99%.
In like manner, the intersection point of ultrasonic wave in acousto-optic medium 33 that the ultrasonic wave that the first transducer 2 produces and the 4th transducer 31 produce is the C point, the intersection point of ultrasonic wave in acousto-optic medium 33 that the ultrasonic wave that the second transducer 5 produces and the 3rd transducer 26 produce is the B point, the intersection point of ultrasonic wave in acousto-optic medium 33 that the ultrasonic wave that the second transducer 5 produces and the 4th transducer 31 produce is the A point, when incident light passes A, B, C point respectively, with regard to energy while and two ultrasonic wave generation acoustic optic interactions, produce the bidimensional diffraction light, thereby reach the purpose that improves diffraction efficiency.
The present invention is referred to as " access points " to A, B, C, 4 of D, when laser burns out certain access points, change the radio frequency input socket, and laser is adjusted on the access points of relevant position, product can work again, and the life-span of such multi-channel sound and light Q switch just is equivalent to 4 times of common acousto-optic Q switch life.If make too much transducer, the life-span of product also will be multiplied.Transducer in prior art on two-dimensional acousto-optic Q switch two bonded layers is one, can only obtain an access points.Core of the present invention is, making the transducer at least one bonded layer wherein is two or more that work alone, transducer on two bonded layers meets following position relationship: hyperacoustic intersection point that on the ultrasonic wave that on one of them bonded layer, any one transducer produces and another bonded layer, any one transducer produces, in acousto-optic medium, so just can obtain a plurality of access points.Transducer in Fig. 1 on bonded layer is two, and obtaining four access points is only a specific embodiment, according to actual needs, can be that a bonded layer is a transducer, and another bonded layer is two transducers, obtains two access points; Perhaps a bonded layer is three transducers, and another bonded layer is two transducers, obtains six access points.
The first screw 11 and the second screw 23 that on base 1, arrange all and between base 1 conduct, the first solder joint 10, the second solder joint 24 respectively and the distance between the first screw 11, the second screw 23 be less than 10mm, and be less than the electric conducting state of 0.1 ohm in resistance, can reduce the decay of radiofrequency signal, be conducive to the raising of diffraction efficiency.
The first transducer 2, the second transducer 5, the ultrasonic wave that the 3rd transducer 26 and tetra-transducers 31 produce is transferred on the sound absorption face 12 of processing through texturing through acousto-optic medium 33, potsherd 13 on the sound absorption face of being close to 12 absorbs and is converted into heat energy, calibrated 14 of heat energy is delivered on base 1, because correcting block 14 is selected quartz crystal or monocrystalline silicon and is made, quartz crystal or monocrystalline silicon thermal conductivity are higher than acousto-optic medium 33, heat is transmitted rapidly, radiating effect is good, the heat of acousto-optic medium 33 can be passed rapidly, avoid excess Temperature to burn out transducer, improve the reliability of this multi-channel sound and light Q switching.
Two logical sound faces of described acousto-optic medium 33 are mutually vertical, and the angle between two logical sound faces is respectively 90 ° ± 2 °, so just can reach the purpose that improves diffraction efficiency.
As shown in Figure 2, the sidewall at the installation cavity of base 1 is provided with the first groove 3, the second groove 6, the 3rd groove 9, the 4th groove 25, the 5th groove 28 and the 6th groove 30.Described the first transducer 2 and the first table electrode 4 all are positioned at described the first groove 3, described the second transducer 5 and the second table electrode 7 all are positioned at described the second groove 6, described the first solder joint 10 is positioned at described the 3rd groove 9, described the second solder joint 24 is positioned at described the 4th groove 25, described the 3rd transducer 26 and the 3rd table electrode 27 all are positioned at described the 5th groove 28, and described the 4th transducer 31 and the 4th table electrode 29 all are positioned at described the 6th groove 30.
For transducer and solder joint, groove is set respectively on base, and, at fluted interior filling heat-conducting glue 34, the thermal conductivity of heat-conducting glue 34 is greater than 0.8W/m-K, the heat of transducer and solder joint generation can be scattered like this, avoid heat to concentrate and burn out transducer.Groove is set has also increased the contact area of acousto-optic medium and base, is conducive to the transmission of heat, reduces the temperature of transducer.
The above embodiment of the present invention is only to be explanation example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make on the basis of the above description other multi-form variation and changes.Here can't give all execution modes exhaustive.Every still row in protection scope of the present invention of apparent variation that technical scheme of the present invention amplifies out or change that belong to.
Claims (6)
1. a multi-channel sound and light Q switching, comprise base, this base is provided with the installation cavity of opening, in this installation cavity, acousto-optic medium is installed, this acousto-optic medium has two logical sound face and sound absorption faces, and the angle of two logical sound faces is 90 ° ± 2 °, on two logical sound faces, bonded layer all is installed, be respectively arranged with solder joint on bonded layer, two solder joints respectively be arranged on base on corresponding screw conduct, be respectively equipped with transducer on two bonded layers; It is characterized in that: wherein the transducer at least one bonded layer is two or more that work alone, be separately installed with the table electrode on all transducers, the table electrode is electrically connected to one by one with corresponding matching network, and matching network connects with high-frequency socket corresponding on base respectively more one by one; Transducer on two bonded layers meets following position relationship: hyperacoustic intersection point that on the ultrasonic wave that on one of them bonded layer, any one transducer produces and another bonded layer, any one transducer produces is in acousto-optic medium.
2. multi-channel sound and light Q switching according to claim 1, it is characterized in that: the transducer on described two bonded layers is two.
3. multi-channel sound and light Q switching according to claim 1 is characterized in that: be provided with some grooves on the sidewall of floor installation chamber, on acousto-optic medium all transducer and solder joint all with groove one to one mode be positioned at groove.
4. multi-channel sound and light Q switching according to claim 3, it is characterized in that: be filled with heat-conducting glue in described groove, the thermal conductivity of heat-conducting glue is greater than 0.8W/m-K.
5. multi-channel sound and light Q switching according to claim 1 is characterized in that: described solder joint is less than 10mm with the distance between corresponding screw, and is less than the electric conducting state of 0.1 ohm in resistance.
6. multi-channel sound and light Q switching according to claim 1, it is characterized in that: the sound absorption surface roughness Ra of described acousto-optic medium is greater than 0.1; Potsherd is installed on the sound absorption face of acousto-optic medium, and on this potsherd, laminating is equipped with the correcting block that is positioned at described installation cavity, and the material of this correcting block is quartz crystal or monocrystalline silicon.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310494403.1A CN103500918B (en) | 2013-10-21 | 2013-10-21 | A kind of multi-channel acousto-optic Q-Switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310494403.1A CN103500918B (en) | 2013-10-21 | 2013-10-21 | A kind of multi-channel acousto-optic Q-Switch |
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| CN103500918A true CN103500918A (en) | 2014-01-08 |
| CN103500918B CN103500918B (en) | 2016-02-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406346A (en) * | 2015-12-29 | 2016-03-16 | 中国电子科技集团公司第二十六研究所 | Minisize acousto-optic Q-switched apparatus |
| CN110401096A (en) * | 2018-04-24 | 2019-11-01 | 福州高意光学有限公司 | A kind of high efficiency A-O Q-switch device |
| CN117239529A (en) * | 2023-11-16 | 2023-12-15 | 长春理工大学 | High-repetition-frequency anhydrous air-cooling-free laser based on acoustic-optical path regulation and control and output method |
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| US20030086447A1 (en) * | 1998-10-21 | 2003-05-08 | Eddie H. Young | High loss modulation acousto-optic q-switch for high power multimode laser |
| CN201118091Y (en) * | 2007-09-05 | 2008-09-17 | 武汉中谷电源设备有限公司 | Same medium two-dimensional acousto-optic Q switch |
| CN103311795A (en) * | 2013-06-18 | 2013-09-18 | 中国电子科技集团公司第二十六研究所 | Two-dimensional acousto-optic q-switch |
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| JPH057046A (en) * | 1991-06-27 | 1993-01-14 | Fuji Electric Co Ltd | Q-switched control laser system |
| US20030086447A1 (en) * | 1998-10-21 | 2003-05-08 | Eddie H. Young | High loss modulation acousto-optic q-switch for high power multimode laser |
| CN201118091Y (en) * | 2007-09-05 | 2008-09-17 | 武汉中谷电源设备有限公司 | Same medium two-dimensional acousto-optic Q switch |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406346A (en) * | 2015-12-29 | 2016-03-16 | 中国电子科技集团公司第二十六研究所 | Minisize acousto-optic Q-switched apparatus |
| CN110401096A (en) * | 2018-04-24 | 2019-11-01 | 福州高意光学有限公司 | A kind of high efficiency A-O Q-switch device |
| CN117239529A (en) * | 2023-11-16 | 2023-12-15 | 长春理工大学 | High-repetition-frequency anhydrous air-cooling-free laser based on acoustic-optical path regulation and control and output method |
| CN117239529B (en) * | 2023-11-16 | 2024-01-23 | 长春理工大学 | High-repetition-frequency anhydrous air-cooling-free laser based on acoustic-optical path regulation and control and output method |
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| CN103500918B (en) | 2016-02-17 |
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