CN108054626A - To the method for pump light finely regulating in a kind of end-face pump solid laser - Google Patents
To the method for pump light finely regulating in a kind of end-face pump solid laser Download PDFInfo
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- CN108054626A CN108054626A CN201711323938.7A CN201711323938A CN108054626A CN 108054626 A CN108054626 A CN 108054626A CN 201711323938 A CN201711323938 A CN 201711323938A CN 108054626 A CN108054626 A CN 108054626A
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- pump
- wavelength
- pump light
- light
- ultrasonic
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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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094038—End pumping
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094049—Guiding of the pump light
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses in a kind of end-face pump solid laser to the method for pump light finely regulating, acousto-optic modulation disk is added in common pump light Lens Coupling system, the relation that the angle of the diffraction light generated using acoustooptic diffraction is directly proportional to ultrasonic wavelength, power of diffraction light is directlyed proportional to ultrasonic power, to the Energy distribution progress finely regulating of pump light.The fineness of institute's extracting method regulation and control pump light distribution of the present invention is very high.The pump light distribution form of the controllable generation of this method is very various, can be adjusted according to the needs of laser works.The present invention only regulates and controls pump light distribution by ultrasonic parameters, does not have any mechanical movement in regulation process, regulates the speed fast, reliable and stable.
Description
Technical field
The present invention is related in field of laser device technology more particularly to a kind of laser diode end-face pump solid laser to pump
The method of the Energy distribution finely regulating of Pu light.
Background technology
In laser diode end-face pump solid laser, coupling pump light system directly exports laser diode or light
The light beam of fibre output, which becomes, carries out optical shaping conversion, then carries out end pumping to laser medium.Pump light in laser medium
On the one hand Energy distribution determines the gain profiles in laser medium, on the other hand also determine the fuel factor point in laser medium
Cloth, the two the performance of solid state laser from two different side effects, and therefore, coupling pump light is the one of solid state laser
Item key technology.With the raising of laser power level, pump light intensities increase, the gain profiles effect and fuel factor generated
Influence to laser power, beam quality is more prominent.In order to further improve solid state laser performance, it is necessary to pump light
Energy distribution carry out finely regulating, its distribution form is made to be conducive to solid state laser and exports the light beam matter that high power is become reconciled
Amount.
Currently used coupling pump light system realizes that the shaping to pump light converts using lens group, to light beam after shaping
It is converged, end pumping is carried out to laser medium with the focal spot of converging beam.This coupling pump light being made of lens
The pump spot that system generates, Energy distribution determine that distribution form is single by the convergence property of optical system.It will be to pump spot
When being adjusted, it can only be realized by the machinery adjustment to some or certain several lens positions to pump spot position and size
Fine tuning can not carry out fine, diversified regulation and control to the distribution of energy in hot spot according to the needs of laser works, this is difficult to full
The foot demand that high power solid state laser regulates and controls pump light distribution at present.Therefore, develop a kind of to pump light distribution progress essence
The method of fine tuning control has important value to the promotion of solid state laser performance.
The content of the invention
It is an object of the invention to provide in a kind of end-face pump solid laser to the method for pump light finely regulating, with
Solve above-mentioned technical problem.
The present invention uses following technical scheme to achieve the above object：
To the method for pump light finely regulating in a kind of end-face pump solid laser, in common pump light Lens Coupling
Acousto-optic modulation disk is added in system, the diffraction light generated using acoustooptic diffraction angle is directly proportional to ultrasonic wavelength, diffraction light
The power relation directly proportional to ultrasonic power, finely regulating is carried out to the Energy distribution of pump light.
The method of pump light finely regulating, this method are as follows in a kind of end-face pump solid laser：
1) collimated light beam, is transformed to using common lens transformation method by optical fiber output laser diode-pumped light beam；
2), collimated light beam enters acousto-optic modulation disk progress acoustooptic diffraction, is formed after acousto-optic modulation and is passed along different directions
The pump beam broadcast, the light beam along different directions propagation that acousto-optic modulation is formed, on the focal plane of lens, are passed through lens focus
It broadcasts the different position that the different light beam in direction is converged on focal plane and forms convergence hot spot, by the use of the hot spot as pump spot to swashing
Optical medium carries out end pumping；
3), to solid state laser carry out end pumping when, predefine need ultrasonic wavelength number, wavelength value and its
Corresponding ultrasonic power size, is loaded by driving power on acousto-optic modulation disk, is formed on the focal plane of plus lens
Preliminary pump spot distribution, pumping is carried out with it；
4) to the needs of pump spot Energy distribution finely regulating when, according to solid state laser work, further adjustment is each
The wavelength value of a ultrasonic wave and its corresponding ultrasonic power, the Energy distribution of finely regulating pump spot, until obtaining close want
Until the pump spot Energy distribution asked.
Further scheme is invented as this case, in order to generate the ultrasonic wave radially propagated in acousto-optic modulation disk,
Several PZT (piezoelectric transducer)s (PZT) are arranged in the central area of acousto-material, and each PZT (piezoelectric transducer) generates what is propagated along radial direction
Ultrasonic wave, multiple PZT combine the loop-shaped ultrasound for being formed in disk and radially being propagated.In general, PZT is needed by radio frequency electrical
Source drives, and for the consistent ultrasonic wave of the formation phase in disk, each PZT is driven by same radio-frequency power supply in this programme.
Further scheme is invented as this case, for the ultrasonic wave of some wavelength, wavelength size determines pump light
The direction of propagation, its ultrasonic power after its diffraction determine the power of diffraction light, and the wavelength of ultrasonic wave is controlled to can control pumping
The direction of propagation of light controls the ultrasonic power of the wavelength to can control the energy size of pump light on the corresponding direction of propagation, passes through tune
The whole loading ultrasound number of wavelength, the size of wavelength and the corresponding ultrasonic power of each wavelength accurately adjust acousto-optic modulation disk tune
Pump light form after system.
Compared with prior art, the present invention has the following advantages：(1) angle for the diffraction light that acoustooptic diffraction is formed and pumping
The ratio of optical wavelength and ultrasonic wavelength is related, and the ratio is about 10-3Magnitude, therefore, institute's extracting method of the present invention regulate and control pumping
The fineness of light distribution is very high.
(2) ultrasonic parameters needed can flexibly be generated by the driving power of PZT, therefore, the controllable generation of this method
Pump light distribution form it is very various, can be adjusted according to the needs of laser works.
(3) this programme only regulates and controls pump light distribution by ultrasonic parameters, does not have any mechanical movement in regulation process, adjusts
Whole speed is fast, reliable and stable.
Description of the drawings
Fig. 1 is the system structure diagram of pump light distribution acousto-optic finely regulating.
Fig. 2 is the structure chart of acousto-optic modulation disk.
In figure：1st, optical fiber, 2, acousto-optic modulation disk, 3, lens A, 4, lens B, 5, acousto-material, 6, PZT.
Specific embodiment
The present invention is further elaborated in the following with reference to the drawings and specific embodiments.
To the method for pump light finely regulating in a kind of end-face pump solid laser, it is as follows：
1) laser diode-pumped light beam, is exported by optical fiber 1, directional light is transformed to using common 3 converter techniques of lens A
Beam；
2), collimated light beam enters acousto-optic modulation disk progress acoustooptic diffraction, is formed after acousto-optic modulation and is passed along different directions
The pump beam broadcast if depicted 3 ultrasonic wavelength in Fig. 1, generates the situation of 3 different directions of propagation light beams；Acousto-optic modulation
The light beam propagated along different directions formed is focused on through lens B 4 on the focal plane of lens B 4, the different light beam in the direction of propagation
The different position converged on focal plane forms convergence hot spot, and end face pump is carried out to laser medium by the use of the hot spot as pump spot
Pu；
In order to generate the ultrasonic wave radially propagated in acousto-optic modulation disk, as shown in Fig. 2, in acousto-material 5
Several PZT (piezoelectric transducer)s (PZT) 6 are arranged in heart district domain, and each PZT (piezoelectric transducer) generates the ultrasonic wave propagated along radial direction, multiple
PZT6 combines the loop-shaped ultrasound for being formed in disk and radially being propagated.In general, PZT6 needs are driven by radio-frequency power supply, it is
The consistent ultrasonic wave of phase is formed in disk, each PZT 6 is driven by same radio-frequency power supply in this programme.
3), to solid state laser carry out end pumping when, predefine need ultrasonic wavelength number, wavelength value and its
Corresponding ultrasonic power size, is loaded by driving power on acousto-optic modulation disk 2, on the focal plane of plus lens B 4
Preliminary pump spot distribution is formed, pumping is carried out with it；
4) to the needs of pump spot Energy distribution finely regulating when, according to solid state laser work, further adjustment is each
The wavelength value of a ultrasonic wave and its corresponding ultrasonic power, the Energy distribution of finely regulating pump spot, until obtaining close want
Until the pump spot Energy distribution asked.
For the ultrasonic wave of some wavelength, wavelength size determine the direction of propagation of the pump light after its diffraction, its
Ultrasonic power determines the power of diffraction light, and the wavelength of ultrasonic wave is controlled to can control the direction of propagation of pump light, controls the wavelength
Ultrasonic power can control the energy size of pump light on the corresponding direction of propagation, number, ripple by adjusting the ultrasonic wavelength of loading
Long size and the corresponding ultrasonic power of each wavelength accurately adjusts the modulated pump light form of acousto-optic modulation disk.
The above is present pre-ferred embodiments, for the ordinary skill in the art, according to the present invention
Introduction, in the case where not departing from the principle of the present invention and spirit, the changes, modifications, replacement and the change that are carried out to embodiment
Type is still fallen within protection scope of the present invention.
Claims (4)
1. to the method for pump light finely regulating in a kind of end-face pump solid laser, which is characterized in that in common pumping
Acousto-optic modulation disk is added in optical lens coupled system, the angle and ultrasonic wavelength of the diffraction light generated using acoustooptic diffraction are into just
The relation more directly proportional to ultrasonic power than the power of, diffraction light carries out finely regulating to the Energy distribution of pump light.
2. to the method for pump light finely regulating, feature in a kind of end-face pump solid laser as described in claim 1
It is, this method is as follows：
1) collimated light beam, is transformed to using common lens transformation method by optical fiber output laser diode-pumped light beam；
2), collimated light beam enters acousto-optic modulation disk progress acoustooptic diffraction, forms what is propagated along different directions after acousto-optic modulation
Pump beam, acousto-optic modulation formed along the light beam that different directions are propagated through lens focus on the focal plane of lens, propagation side
The different position converged to different light beams on focal plane forms convergence hot spot, is situated between by the use of the hot spot as pump spot to laser
Matter carries out end pumping；
3) when, carrying out end pumping to solid state laser, ultrasonic wavelength number, wavelength value and its correspondence needed is predefined
Ultrasonic power size, be loaded on acousto-optic modulation disk, formed on the focal plane of plus lens preliminary by driving power
Pump spot distribution, carry out pumping with it；
4) to the needs of pump spot Energy distribution finely regulating when, according to solid state laser work, further adjust each super
The wavelength value of sound wave and its corresponding ultrasonic power, the Energy distribution of finely regulating pump spot, until obtaining close to requirement
Until pump spot Energy distribution.
3. to the method for pump light finely regulating, feature in a kind of end-face pump solid laser as described in claim 1
It is, in order to generate the ultrasonic wave radially propagated in acousto-optic modulation disk, is arranged in the central area of acousto-material several
PZT (piezoelectric transducer) (PZT), each PZT (piezoelectric transducer) generate the ultrasonic wave propagated along radial direction, and multiple PZT combine in circle
The loop-shaped ultrasound radially propagated is formed in disk, PZT needs are driven by radio-frequency power supply, consistent in order to form phase in disk
Ultrasonic wave, each PZT is driven by same radio-frequency power supply in this programme.
4. to the method for pump light finely regulating, feature in a kind of end-face pump solid laser as described in claim 1
It is, for the ultrasonic wave of some wavelength, wavelength size determines the direction of propagation of the pump light after its diffraction, its ultrasound
The power decision power of diffraction light, controls the wavelength of ultrasonic wave to can control the direction of propagation of pump light, controls the super of the wavelength
Acoustical power can control the energy size of pump light on the corresponding direction of propagation, the number, wavelength by adjusting the ultrasonic wavelength of loading
Size and the corresponding ultrasonic power of each wavelength accurately adjust the modulated pump light form of acousto-optic modulation disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711323938.7A CN108054626A (en) | 2017-12-13 | 2017-12-13 | To the method for pump light finely regulating in a kind of end-face pump solid laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711323938.7A CN108054626A (en) | 2017-12-13 | 2017-12-13 | To the method for pump light finely regulating in a kind of end-face pump solid laser |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764347A (en) * | 2009-11-16 | 2010-06-30 | 深圳市大族激光科技股份有限公司 | acousto-optic modulation laser |
| CN101819147A (en) * | 2010-04-09 | 2010-09-01 | 哈尔滨工程大学 | Dynamic measurement method and device of effective service life of laser upper energy level |
| CN102354903A (en) * | 2011-10-18 | 2012-02-15 | 哈尔滨工程大学 | Air-spaced Fabry-Perot etalon and solid laser with same |
| CN106200028A (en) * | 2016-08-04 | 2016-12-07 | 山东航天电子技术研究所 | A kind of method improving acousto-optic frequency shifters diffraction intensity and diffraction efficiency |
-
2017
- 2017-12-13 CN CN201711323938.7A patent/CN108054626A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764347A (en) * | 2009-11-16 | 2010-06-30 | 深圳市大族激光科技股份有限公司 | acousto-optic modulation laser |
| CN101819147A (en) * | 2010-04-09 | 2010-09-01 | 哈尔滨工程大学 | Dynamic measurement method and device of effective service life of laser upper energy level |
| CN102354903A (en) * | 2011-10-18 | 2012-02-15 | 哈尔滨工程大学 | Air-spaced Fabry-Perot etalon and solid laser with same |
| CN106200028A (en) * | 2016-08-04 | 2016-12-07 | 山东航天电子技术研究所 | A kind of method improving acousto-optic frequency shifters diffraction intensity and diffraction efficiency |
Non-Patent Citations (2)
| Title |
|---|
| 刘海霞 等: ""声光衍射及实验研究"", 《实验室研究与探索》 * |
| 逯美红 等: ""基于声光效应的声光器件特性研究"", 《通信技术》 * |
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Application publication date: 20180518 |