CN110364925A - A kind of high performance fiber coupling acousto-optic modulator - Google Patents
A kind of high performance fiber coupling acousto-optic modulator Download PDFInfo
- Publication number
- CN110364925A CN110364925A CN201810316410.5A CN201810316410A CN110364925A CN 110364925 A CN110364925 A CN 110364925A CN 201810316410 A CN201810316410 A CN 201810316410A CN 110364925 A CN110364925 A CN 110364925A
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- output end
- acousto
- input terminal
- light
- optic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1123—Q-switching
- H01S3/117—Q-switching using intracavity acousto-optic devices
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a kind of high performance fiber coupling acousto-optic modulators, it includes input terminal matt structure, output end matt structure, input terminal reflector, output end mirror, shell with accommodating cavity and the input optical fibre being sequentially arranged in shell accommodating cavity, input terminal collimation lens, acousto-optic crsytal, output end collimation lens and output optical fibre, input terminal reflector and output end mirror are symmetrically arranged at the two sides of acousto-optic crsytal, input terminal matt structure is opposite with input terminal reflector and for receiving the light for inputting terminal reflector reflection, output end matt structure is opposite with output end mirror and is used to receive the light of output end mirror reflection, acousto-optic crsytal is electrically connected with radio-frequency driven module and is controlled by radio-frequency driven module, the present invention not only has high on-off ratio, so that it has in being applied to laser preferably adjusts Q Effect, but also have both high reliability, temperature tolerance and there is high damage threshold, make it possible to be suitble to apply in high power laser.
Description
Technical field
The present invention relates to laser technology field, especially a kind of high performance fiber coupling acousto-optic modulator.
Background technique
Currently, laser is all widely used in various industries field, such as laser cutting, mark, with coupling
The development of technology and the market demand, laser generally realize all-fiber, this includes wherein important Q-switching device optical fiber coupling
Free space acousto-optic modulator is integrated into laser, so that laser by chorus optical modulator using the coupling technique of collimator
The structure of device is more compact, but due to high-power laser easy damaged film layer, glue-line and oxide layer, therefore on certain depth
Also limit the further promotion of laser power.
Summary of the invention
The case where for the prior art, the purpose of the present invention is to provide a kind of structures simply, implements reliable and can realize
The high performance fiber coupling acousto-optic modulator of high-power output.
In order to realize above-mentioned technical purpose, the technical solution adopted by the present invention are as follows:
A kind of high performance fiber coupling acousto-optic modulator, connect with radio-frequency driven module comprising input terminal matt structure, defeated
Outlet matt structure inputs terminal reflector, output end mirror, the shell with accommodating cavity and is sequentially arranged shell accommodating cavity
Interior input optical fibre, input terminal collimation lens, acousto-optic crsytal, output end collimation lens and output optical fibre, the input terminal are anti-
It penetrates mirror and output end mirror is symmetrically arranged at the two sides of acousto-optic crsytal, the input terminal matt structure and input terminal are anti-
Penetrate the light that mirror is opposite and reflects for receiving input terminal reflector, the output end matt structure and output end mirror phase
To and for receive the light that output end mirror reflects, the acousto-optic crsytal is electrically connected with radio-frequency driven module and by radio frequency
Drive module control；
When the work of radio-frequency driven module, light reaches input terminal collimation lens formation Collimated Gaussian Beam from input optical fibre and penetrates
Enter acousto-optic crsytal, the light diffraction of input is formed into level-one light and zero order light by acousto-optic crsytal, wherein level-one light is by output end standard
Straight lens receive, then incoming output optical fibre is exported, and zero order light is reflexed in output end matt structure by output end mirror
Carry out Circulated reflection；
When radio-frequency driven module does not work, light reaches input terminal collimation lens from input optical fibre and forms Collimated Gaussian Beam simultaneously
Acousto-optic crsytal is injected, acousto-optic crsytal only transmits and forms zero order light, and zero order light reflexes to output end delustring knot by output end mirror
Circulated reflection is carried out in structure.
Further, the input terminal matt structure and output end matt structure are internal rectangular with delustring cavity
Body, ellipsoid or sphere structure, and its surface has the light well of connection delustring cavity, the light well and input terminal reflect
The light that mirror or output end mirror reflect relatively and for receiving input terminal reflector or output end mirror.
Further, the input terminal matt structure and output end matt structure be crystal molding or metal material at
Type.
Further, the output optical fibre welding has coreless fiber.
Further, the accommodating cavity bottom of the shell is equipped with semiconductor cooler bottom plate.
Using above-mentioned technical solution, the invention has the benefit that the present invention program not only has high on-off ratio, so that
It has better q-effect in being applied to laser, but also has both high reliability, temperature tolerance and have high damage fault
Value, makes it possible to be suitble to apply in high power laser.
Detailed description of the invention
The present invention is further elaborated with reference to the accompanying drawings and detailed description:
Fig. 1 is the structural schematic diagram of prior art acousto-optic modulator；
Fig. 2 is the partial structurtes simplified diagram of acousto-optic modulator of the present invention, and wherein shell is not shown；
Fig. 3 is the cutting structural schematic diagram of acousto-optic modulator of the present invention；
Fig. 4 is the input of acousto-optic modulator of the present invention or the brief configuration schematic diagram for exporting matt structure；
Fig. 5 is that diffraction efficiency curve of the acousto-optic modulator that measures of structure of the invention in different temperatures is surveyed with using ordinary construction
The diffraction efficiency curve comparison obtained.
Specific embodiment
As shown in Figure 1, it illustrates one of structural schematic diagrams of acousto-optic modulator in the prior art, wherein light is from tail optical fiber
101 reach the Gaussian beam that collimator lens 102 form collimation, form level-one light and zero order light, level-one by 104 diffraction of crystal
It is optically coupled into collimator lens 106 and is spread out of by tail optical fiber 107, zero order light is kept off by diaphragm 105 and can not be coupled into side, institute
There is sub-unit to be mounted directly inside housings.The compact structure is compact, simple process, the optical-fiber laser for being suitble to power output not high
Device, when in high power laser, high power laser light is beaten on diaphragm always, and is reflected into shell, will cause veiling glare compared with
It is more, the oxide layer in apertured sheet face is in addition also easily damaged, causes lens surface to pollute, in addition also results in collimation lens temperature mistake
Height influences the thickness of glue-line, causes the reduction of coupling efficiency, wherein collimator lens 102,103 respectively by fixing piece 103,
105 are fixed, and 108 be shell (only schematically illustrating part).
As shown in Fig. 2, it on the basis of Fig. 1 shows the defect of structure, improvement obtains the present invention program, with radio-frequency driven
Module connection comprising input terminal matt structure 204, output end matt structure 206, input terminal reflector 203, output end reflection
Mirror 207, the shell 210 with accommodating cavity and the input optical fibre 201 being sequentially arranged in 210 accommodating cavity of shell, input terminal collimation
Lens 202, acousto-optic crsytal 205, output end collimation lens 208 and output optical fibre 209, the input terminal reflector 203 and defeated
Outgoing mirror 207 is symmetrically arranged at the two sides of acousto-optic crsytal 205, the input terminal matt structure 204 and input terminal
Reflecting mirror 203 is opposite and the light that reflects 203 for receiving input terminal reflector, the output end matt structure 206 with it is defeated
Outgoing mirror 207 is opposite and is used to receive the light of the reflection of output end mirror 207, the acousto-optic crsytal 205 and radio frequency
Drive module is electrically connected and is controlled by radio-frequency driven module；
When the work of radio-frequency driven module, light reaches input terminal collimation lens 202 from input optical fibre 201 and forms collimation Gauss light
Beam simultaneously injects acousto-optic crsytal, the light diffraction of input is formed level-one light and zero order light by acousto-optic crsytal 205, wherein level-one light
It is received by output end collimation lens 208, then incoming output optical fibre 209 is exported, zero order light is reflected by output end mirror 207
Circulated reflection is carried out into output end matt structure 206；
When radio-frequency driven module does not work, light reaches input terminal collimation lens 202 from input optical fibre 201 and forms collimation Gauss
Light beam simultaneously injects acousto-optic crsytal 205, and acousto-optic crsytal 205 only transmits and forms zero order light, and zero order light is reflected by output end mirror 207
Circulated reflection is carried out into output end matt structure 206, such mode makes zero order light in two kinds of feelings of radio-frequency driven on and off
It can not be coupled into output lens under condition, and then improve the on-off ratio of device, in addition, zero order light, which is reflected by a reflector, makes it
It can not get on collimation lens, high power laser light is avoided to get to glue-line, generate volatile matter, pollute device, improve device can
By property.
When output optical fibre 209 is as input optical fibre, structural principle is consistent with above description.
Further, the input terminal matt structure 204 and output end matt structure 206 are internal with delustring cavity
Cuboid, ellipsoid or sphere structure, and its surface has the light well of connection delustring cavity, the light well and input
The light that terminal reflector 203 or output end mirror 207 reflect relatively and for receiving input terminal reflector or output end mirror,
Further, the input terminal matt structure 204 and output end matt structure 206 are crystal molding or metal material moulding.
Further, 209 welding of output optical fibre has coreless fiber.
Further, the accommodating cavity bottom of the shell 210 is equipped with semiconductor cooler bottom plate 211.
In being mounted on 210 inside TEC bottom plate (i.e. semiconductor cooler bottom plate 211) of shell due to acousto-optic crsytal 205
Between position, input terminal matt structure 204 and output end matt structure 206, input terminal reflector 203, output end mirror 207 exist
Crystal two sides are symmetrically placed, light input end collimation lens 202 and input optical fibre 201 and light output end collimation lens 208 and output
Optical fiber 209 facilitates equally on bottom plate and carries out position adjusting.
The on-off ratio that structure of the invention measures and the data comparison that ordinary construction is tested are as follows:
From data it can be seen that structure of the invention can effectively improve the on-off ratio of acousto-optic modulator, there is better q-effect.
Diffraction efficiency curve of the acousto-optic modulator that structure of the invention measures in different temperatures is surveyed with using ordinary construction
The diffraction efficiency curve comparison obtained is as shown in Figure 5.
It can be seen that from the variation of Fig. 5 curve using TEC as bottom plate, the acousto-optic modulator of structure of the invention has more steady
Fixed diffraction efficiency curve is acted upon by temperature changes smaller, in addition at output optical fibre after welding centreless, hot spot at output optical fibre
Diameter increases to 40um by 10um, and corresponding peaks power density is reduced to original 1/16, improves the laser deflection of device
Value.
Claims (5)
1. a kind of high performance fiber coupling acousto-optic modulator, connect with radio-frequency driven module, it is characterised in that: it includes input
End matt structure, inputs terminal reflector, output end mirror, the shell with accommodating cavity and sequentially sets output end matt structure
Input optical fibre, input terminal collimation lens, acousto-optic crsytal, output end collimation lens and output optical fibre in shell accommodating cavity are set,
The input terminal reflector and output end mirror are symmetrically arranged at the two sides of acousto-optic crsytal, the input terminal delustring
Structure with input terminal reflector it is opposite and for receives input terminal reflector reflect light, the output end matt structure and
Output end mirror is opposite and is used to receive the light of output end mirror reflection, the acousto-optic crsytal and radio-frequency driven module
It is electrically connected and is controlled by radio-frequency driven module；
When the work of radio-frequency driven module, light reaches input terminal collimation lens formation Collimated Gaussian Beam from input optical fibre and penetrates
Enter acousto-optic crsytal, the light diffraction of input is formed into level-one light and zero order light by acousto-optic crsytal, wherein level-one light is by output end standard
Straight lens receive, then incoming output optical fibre is exported, and zero order light is reflexed in output end matt structure by output end mirror
Carry out Circulated reflection；
When radio-frequency driven module does not work, light reaches input terminal collimation lens from input optical fibre and forms Collimated Gaussian Beam simultaneously
Acousto-optic crsytal is injected, acousto-optic crsytal only transmits and forms zero order light, and zero order light reflexes to output end delustring knot by output end mirror
Circulated reflection is carried out in structure.
2. a kind of high performance fiber coupling acousto-optic modulator according to claim 1, it is characterised in that: the input
End matt structure and output end matt structure are internal cuboid, ellipsoid or the sphere structure with delustring cavity, and its
Surface has a light well of connection delustring cavity, the light well with input terminal reflector or output end mirror is opposite is used in combination
In the light for receiving input terminal reflector or output end mirror reflection.
3. a kind of high performance fiber coupling acousto-optic modulator according to claim 2, it is characterised in that: the input
End matt structure and output end matt structure are crystal molding or metal material moulding.
4. a kind of high performance fiber coupling acousto-optic modulator according to claim 1, it is characterised in that: the output
Fused fiber splice has coreless fiber.
5. a kind of high performance fiber coupling acousto-optic modulator according to claim 1, it is characterised in that: the shell
Accommodating cavity bottom is equipped with semiconductor cooler bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810316410.5A CN110364925A (en) | 2018-04-10 | 2018-04-10 | A kind of high performance fiber coupling acousto-optic modulator |
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| CN201810316410.5A CN110364925A (en) | 2018-04-10 | 2018-04-10 | A kind of high performance fiber coupling acousto-optic modulator |
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| CN110364925A true CN110364925A (en) | 2019-10-22 |
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| WO2001014925A9 (en) * | 1999-08-23 | 2002-05-10 | Etec Systems Inc | Thermally balanced acousto-optic modulator |
| CN103532001A (en) * | 2013-09-27 | 2014-01-22 | 深圳朗光科技有限公司 | High-power optical fiber acoustic optical modulator and optical fiber laser |
| CN104267516A (en) * | 2014-10-28 | 2015-01-07 | 中国电子科技集团公司第二十六研究所 | High-laser-power-tolerant optical fiber acousto-optic device |
| CN105048276A (en) * | 2015-07-28 | 2015-11-11 | 深圳联品激光技术有限公司 | Acousto-optic Q switch and laser device |
| US20170170619A1 (en) * | 2014-11-21 | 2017-06-15 | Photonics Industries International, Inc. | Pulse Picking Laser |
| CN207217995U (en) * | 2017-09-19 | 2018-04-10 | 上海濠润电子科技有限公司 | A kind of laser power stability device |
| CN208571218U (en) * | 2018-08-21 | 2019-03-01 | 福建海创光电有限公司 | A kind of acousto-optic Q-switching for optical fiber laser |
| CN110308565A (en) * | 2019-06-24 | 2019-10-08 | 西安空间无线电技术研究所 | A kind of wide spectrum acousto-optic modulation spatial light obscures stripping system and method |
| CN209858765U (en) * | 2019-02-19 | 2019-12-27 | 天津人诺科技有限公司 | Extinction body |
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2018
- 2018-04-10 CN CN201810316410.5A patent/CN110364925A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001014925A9 (en) * | 1999-08-23 | 2002-05-10 | Etec Systems Inc | Thermally balanced acousto-optic modulator |
| CN103532001A (en) * | 2013-09-27 | 2014-01-22 | 深圳朗光科技有限公司 | High-power optical fiber acoustic optical modulator and optical fiber laser |
| CN104267516A (en) * | 2014-10-28 | 2015-01-07 | 中国电子科技集团公司第二十六研究所 | High-laser-power-tolerant optical fiber acousto-optic device |
| US20170170619A1 (en) * | 2014-11-21 | 2017-06-15 | Photonics Industries International, Inc. | Pulse Picking Laser |
| CN105048276A (en) * | 2015-07-28 | 2015-11-11 | 深圳联品激光技术有限公司 | Acousto-optic Q switch and laser device |
| CN207217995U (en) * | 2017-09-19 | 2018-04-10 | 上海濠润电子科技有限公司 | A kind of laser power stability device |
| CN208571218U (en) * | 2018-08-21 | 2019-03-01 | 福建海创光电有限公司 | A kind of acousto-optic Q-switching for optical fiber laser |
| CN209858765U (en) * | 2019-02-19 | 2019-12-27 | 天津人诺科技有限公司 | Extinction body |
| CN110308565A (en) * | 2019-06-24 | 2019-10-08 | 西安空间无线电技术研究所 | A kind of wide spectrum acousto-optic modulation spatial light obscures stripping system and method |
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Application publication date: 20191022 |
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