CN202693930U - Wide-band acousto-optic component - Google Patents
Wide-band acousto-optic component Download PDFInfo
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- CN202693930U CN202693930U CN201220415316.3U CN201220415316U CN202693930U CN 202693930 U CN202693930 U CN 202693930U CN 201220415316 U CN201220415316 U CN 201220415316U CN 202693930 U CN202693930 U CN 202693930U
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- acousto
- optic
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- matching network
- optical device
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Abstract
A wide-band acousto-optic component comprises a high-frequency socket, a matching network, and acousto-optic crystals, wherein an output end of the high-frequency socket is connected with an input end of the matching network, an output end of the matching network is in electrode connection with the surfaces of the acousto-optic crystals, and the number of the acousto-optic crystals is at least two. The thickness of transducers of the acousto-optic crystals is different, the thickness of each transducer of each acousto-optic crystal is sequentially 20 percent less than one another from high to low, and an included angle between acousto-optic medium of two acousto-optic crystals with a similar transducer thickness value is 0.02 degree to 5 degrees. Bonding layers of adjacent acousto-optic crystals are connected through metal wires. Each acousto-optic crystal is responsible for certain different work bandwidth, and the work bandwidth of the acousto-optic component is the sum of the work bandwidth of each acousto-optic crystal. Therefore, limit of a single acousto-optic component to the work bandwidth is broke through and the work bandwidth of the acousto-optic component is greatly improved. Moreover, the wide-band acousto-optic component has the advantages of being convenient to manufacture and low in cost.
Description
Technical field
The present invention relates to acousto-optical device, especially a kind of broadband acousto-optical device.
Background technology
Acousto-optical device is that acoustic optic interaction occurs in acousto-optic medium a kind of ultrasound wave of incident light and transducer that utilizes, and obtains diffraction light.The energy of diffraction light shifts from incident light and comes.Certain condition is arranged when incident light and ultrasound wave generation acoustic optic interaction, only have when incident light and hyperacoustic direction satisfy the required angle of Bragg diffraction, just having a large amount of incident light energy to transfer to diffraction light gets on (this diffraction is named as Bragg diffraction), otherwise incident light only has few or does not have energy to transfer to diffraction light.Because the ultrasound wave that transducer produces has certain angle of divergence, like this in certain bandwidth range, the ultrasound wave generation Bragg diffraction that incident light can both produce with transducer, exceed this bandwidth (this bandwidth is named as Prague bandwidth), the ultrasound wave generation Bragg diffraction that incident light just can not produce with transducer, even the generation acoustic optic interaction, it is also very weak to obtain diffraction light, only has few energy to shift diffraction light from incident light and gets on.
Theoretical according to acoustic optic interaction, each acousto-optic crsytal can only be in certain bandwidth range and incident light generation acoustic optic interaction, and the bandwidth of operation of single acousto-optical device is limited.In actual applications, reduce acoustic optic interaction length and can increase Prague bandwidth, but this can reduce the diffraction light intensity, namely reduces diffraction efficiency.In order to obtain the diffraction light in broadband, solve the large not problem of bandwidth of operation of single transducer, dual mode is arranged now, a kind of is the ultrasonic tracking of planar structure formula, another kind is the ultrasonic tracking of staircase structure formula.The limited bandwidth that plane ultrasonic is followed the tracks of, and the homogeneity in the passband reduces along with the increase of transducer sheet number.The ultrasonic tracking of staircase structure formula is because manufacture difficulty is too large, and cost is high, and practical value is low.
Summary of the invention
For the prior art above shortcomings, the invention provides a kind of a plurality of acousto-optic crsytals that are equipped with, bandwidth of operation is large, and diffraction efficiency is high, and is easy to make, the broadband acousto-optical device that cost is low.
To achieve these goals, the object of the present invention is achieved like this: a kind of broadband acousto-optical device, comprise high-frequency socket, matching network and acousto-optic crsytal, described high-frequency socket output terminal is connected with the input end of described matching network, the output terminal of this matching network is connected with the table electrode of acousto-optic crsytal, it is characterized in that the quantity of described acousto-optic crsytal is at least two, the transducer thickness of this acousto-optic crsytal is different; The transducer thickness of described each acousto-optic crsytal differs more than 20% from high to low successively, and the angle between the acousto-optic medium of two acousto-optic crsytals approaching of transducer thickness value all is 0.02 °～5 °; The bonded layer of adjacent acousto-optic crsytal uses wire guide to connect.
Described high-frequency socket, matching network and acousto-optic crsytal all are installed in the shell, and wherein the external interface of high-frequency socket stretches out described shell.
Described shell is made by metal material.
The material of the acousto-optic medium of described acousto-optic crsytal is tellurium oxide crystal, GaP crystal, Crystals of Lead Molybdate, lithium columbate crystal, quartzy crystalline substance, melts quartz or dense flint glass.
The material of the transducer of described acousto-optic crsytal is lithium columbate crystal or zinc-oxide film.
Of the present invention have a following advantage:
1, a plurality of acousto-optic crsytals of broadband acousto-optical device of the present invention are worked simultaneously, each acousto-optic crsytal is responsible for certain and mutually different bandwidth of operation, at this moment the bandwidth of operation of acousto-optical device is the summation of each acousto-optic crsytal bandwidth of operation, broken through single acousto-optical device to the restriction of bandwidth of operation, significantly improved the bandwidth of operation of acousto-optical device, and have also easy to make, the advantage that cost is low.
2, because acousto-optic crsytal only is responsible for certain bandwidth of operation, therefore improve diffraction efficiency by the acoustic optic interaction length (namely reducing Prague bandwidth) that increases each acousto-optic crsytal, the acoustooptic diffraction efficient in bandwidth range is high.
3, whole work components and parts are all by packed by metal casing, and good integrity is easy to install and use, and the shell of metal material has the effect of electromagnetic screen, prevent that the work components and parts of packed by metal casing are interfered.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment the present invention is described in further detail.
As shown in Figure 1, the broadband acousto-optical device, comprise high-frequency socket 7, matching network 6 and two acousto-optic crsytals of being installed in the shell 1 that metal material makes, the external interface of described high-frequency socket 7 stretches out described shell 1, these high-frequency socket 7 output terminals are connected with the input end of described matching network 6, and the output terminal of this matching network 6 all is connected with the table electrode of two acousto-optic crsytals.The transducer thickness of described two acousto-optic crsytals differs more than 20%, and the angle between the acousto-optic medium of these two acousto-optic crsytals is 0.02 °～5 °, and the bonded layer of these two acousto-optic crsytals uses wire guide 8 to connect.
The material of the acousto-optic medium 2 of described acousto-optic crsytal can be selected tellurium oxide crystal, GaP crystal, Crystals of Lead Molybdate, lithium columbate crystal, quartzy crystalline substance, melt quartz or dense flint glass.The material of the transducer 4 of described acousto-optic crsytal can be selected lithium columbate crystal or zinc-oxide film.
The material of acousto-optic medium 2 is tellurium oxide crystal in the present embodiment, and the material of bonded layer 3 is metal (such as indium), and the material of transducer is lithium niobate.Wherein the thickness of the transducer of first sound luminescent crystal 9 is 1.6 microns, and the thickness of the transducer of second sound luminescent crystal 10 is 2.1 microns, and the thickness of this two transducer is different, and its difference is 31.3%.
The transducer of first sound luminescent crystal 9 and Prague angle between the incident light are 119 ＇, the transducer of second sound luminescent crystal 10 and Prague angle between the incident light are 92 ＇, the acousto-optic medium of first sound luminescent crystal 9 and two acousto-optic crsytals 10 angle each other is θ, θ=119 ＇-92 ＇=27 ＇.
Radiofrequency signal is transferred on the table electrode 5 of first sound luminescent crystal 9 and second sound luminescent crystal 10 through high-frequency socket 7, matching network 6, the transducer of first sound luminescent crystal 9 and second sound luminescent crystal 10 all absorbs radiofrequency signal, and radiofrequency signal is converted into ultrasound wave is transferred to respectively in the corresponding acousto-optic medium (2), and at acousto-optic medium 2 formation refractive-index gratings, pass incident light and the refractive-index grating generation acoustic optic interaction of acousto-optic medium, produce diffraction light.
When radio frequency signal frequency was in 1500MHz～2120MHz scope, the transducer 4 of first sound luminescent crystal 9 played a major role, and the refractive-index grating generation acoustic optic interaction that incident light transducer 4 main and first sound luminescent crystal 9 produces produces diffraction light.This is because the tuning-points of the transducer 4 of 1500MHz～2120MHz and first sound luminescent crystal 9 is more approaching, so that the energy of the transducer 4 absorption radiofrequency signals of first sound luminescent crystal 9 is more.
When radio frequency signal frequency was in 2120MHz～3000MHz scope, the transducer 4 of second sound luminescent crystal 10 played a major role, and the refractive-index grating generation acoustic optic interaction that incident light transducer 4 main and second sound luminescent crystal 10 produces produces diffraction light.This is because the tuning-points of the transducer 4 of 2120MHz～3000MHz and second sound luminescent crystal 10 is more approaching, and the energy of the transducer 4 absorption radiofrequency signals of second sound luminescent crystal 10 is more.
The operating frequency range of whole acousto-optical device is 1500MHz～3000MHz, if realize that with a transducer its relative bandwidth is 0.67, difficulty is larger.The present invention takes the combined type acousto-optical device to design, and the transducer operating frequency range of first sound luminescent crystal 9 is 1500MHz～2120MHz, relative bandwidth 0.34; The transducer operating frequency range of second sound luminescent crystal 10 is 2120MHz～3000MHz, relative bandwidth 0.34.Obviously, this combined type acousto-optical device under the prerequisite of the bandwidth of operation that guarantees whole acousto-optical device, has significantly reduced the relative bandwidth of each transducer work, and have easy to make, the advantage that cost is low.
The above embodiment of the present invention only is to be explanation example of the present invention, and is not to be 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 embodiments exhaustive.Everyly belong to the row that apparent variation that technical scheme of the present invention amplifies out or change still are in protection scope of the present invention.
Claims (5)
1. broadband acousto-optical device, comprise high-frequency socket (7), matching network (6) and acousto-optic crsytal, described high-frequency socket (7) output terminal is connected with the input end of described matching network (6), the output terminal of this matching network (6) is connected with the table electrode of acousto-optic crsytal, it is characterized in that, the quantity of described acousto-optic crsytal is at least two, and the transducer thickness of this acousto-optic crsytal is different; The transducer thickness of described each acousto-optic crsytal differs more than 20% from high to low successively, and the angle between the acousto-optic medium of two acousto-optic crsytals approaching of transducer thickness value all is 0.02 °～5 °; The bonded layer of adjacent acousto-optic crsytal uses wire guide (8) to connect.
2. broadband according to claim 1 acousto-optical device, it is characterized in that, also comprise shell (1), described high-frequency socket (7), matching network (6) and acousto-optic crsytal all are installed in the described shell (1), and wherein the external interface of high-frequency socket (7) stretches out described shell (1).
3. broadband according to claim 2 acousto-optical device is characterized in that described shell (1) is made by metal material.
4. broadband according to claim 2 acousto-optical device is characterized in that, the material of the acousto-optic medium of described acousto-optic crsytal be tellurium oxide crystal, GaP crystal, Crystals of Lead Molybdate, lithium columbate crystal, quartzy brilliant, melt quartz or dense flint glass.
5. broadband according to claim 4 acousto-optical device is characterized in that the material of the transducer of described acousto-optic crsytal is lithium columbate crystal or zinc-oxide film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201220415316.3U CN202693930U (en) | 2012-08-21 | 2012-08-21 | Wide-band acousto-optic component |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220415316.3U CN202693930U (en) | 2012-08-21 | 2012-08-21 | Wide-band acousto-optic component |
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| CN202693930U true CN202693930U (en) | 2013-01-23 |
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| CN201220415316.3U Expired - Lifetime CN202693930U (en) | 2012-08-21 | 2012-08-21 | Wide-band acousto-optic component |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076654A (en) * | 2013-03-04 | 2013-05-01 | 中国电子科技集团公司第二十六研究所 | Polarization maintaining optical fiber acousto-optic frequency shift device |
| CN103728745A (en) * | 2014-01-26 | 2014-04-16 | 中国电子科技集团公司第二十六研究所 | Abnormal broadband acousto-optic deflection device |
| CN104635361A (en) * | 2015-03-06 | 2015-05-20 | 中国电子科技集团公司第二十六研究所 | Wide-light-spectrum acousto-optic adjustable light filter |
| CN106019645A (en) * | 2016-08-10 | 2016-10-12 | 中国电子科技集团公司第二十六研究所 | Tail fiber coupling type acousto-optic tunable filtering device |
| CN107850796A (en) * | 2015-06-01 | 2018-03-27 | 菲托尼克斯公司 | Acousto-optic deflection device with hierarchy and the method using this deflector light beam |
| CN110716329A (en) * | 2019-10-29 | 2020-01-21 | 中国电子科技集团公司第二十六研究所 | 1 x 2 path optical fiber acousto-optic switch |
-
2012
- 2012-08-21 CN CN201220415316.3U patent/CN202693930U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076654A (en) * | 2013-03-04 | 2013-05-01 | 中国电子科技集团公司第二十六研究所 | Polarization maintaining optical fiber acousto-optic frequency shift device |
| CN103728745A (en) * | 2014-01-26 | 2014-04-16 | 中国电子科技集团公司第二十六研究所 | Abnormal broadband acousto-optic deflection device |
| CN103728745B (en) * | 2014-01-26 | 2016-03-09 | 中国电子科技集团公司第二十六研究所 | Unusual large bandwidth acoustooptic deflector |
| CN104635361A (en) * | 2015-03-06 | 2015-05-20 | 中国电子科技集团公司第二十六研究所 | Wide-light-spectrum acousto-optic adjustable light filter |
| CN104635361B (en) * | 2015-03-06 | 2017-06-06 | 中国电子科技集团公司第二十六研究所 | Wide spectrum acousto-optic turnable filter |
| CN107850796A (en) * | 2015-06-01 | 2018-03-27 | 菲托尼克斯公司 | Acousto-optic deflection device with hierarchy and the method using this deflector light beam |
| CN107850796B (en) * | 2015-06-01 | 2022-03-01 | 菲托尼克斯公司 | Acousto-optic deflector having a layered structure and method of deflecting a light beam using such a deflector |
| CN106019645A (en) * | 2016-08-10 | 2016-10-12 | 中国电子科技集团公司第二十六研究所 | Tail fiber coupling type acousto-optic tunable filtering device |
| CN110716329A (en) * | 2019-10-29 | 2020-01-21 | 中国电子科技集团公司第二十六研究所 | 1 x 2 path optical fiber acousto-optic switch |
| CN110716329B (en) * | 2019-10-29 | 2023-02-07 | 中国电子科技集团公司第二十六研究所 | 1 x 2 path optical fiber acousto-optic switch |
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