CN107908207A - A kind of automatic temperature-controlled automatic light modulating method of solid-state laser apparatus - Google Patents
A kind of automatic temperature-controlled automatic light modulating method of solid-state laser apparatus Download PDFInfo
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- CN107908207A CN107908207A CN201711181084.3A CN201711181084A CN107908207A CN 107908207 A CN107908207 A CN 107908207A CN 201711181084 A CN201711181084 A CN 201711181084A CN 107908207 A CN107908207 A CN 107908207A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The present invention relates to a kind of automatic temperature-controlled automatic light modulating method of solid-state laser apparatus, including：The laser pumping apparatus (1 1) obtains oscillating laser, the laser is exported from outgoing mirror (2 2) to hold pump mode emission pumping light beam to laser crystal (2 3)；Export laser and inject detection device (3 1), the detection device (3 1) inputs computer control system (4 1) after converting optical signals into electrical signal, and the computer control system (4 1) forms the three-dimensional adjustment platform of control signal control according to the electrical signal.The temperature signal of the laser crystal (2 3) is inputted the computer control system (4 1) by the temperature control device (2 31), the computer control system (4 1) forms the 4th control signal according to the temperature signal, and the 4th control signal controls the temperature of the temperature control device (2 31) so as to ensure that the temperature of the laser crystal (2 3) is consistent with preset value.
Description
Technical field
The present invention relates to a kind of Solid State Laser light-dimming method, particularly a kind of solid-state laser apparatus are automatic temperature-controlled with an automatic light meter
Method.
Background technology
The fuel factor problem of solid state laser is to limit the important bottleneck of laser developments since the dawn of human civilization, especially for
The development of high power laser plays certain restrictive function, therefore, the researcher of field of lasers for a long time one
It is straight to be directed to solve the heat dissipation problem unremitting effort of high power laser.Existing water cooling, the liquid nitrogen type of cooling are although can
The fuel factor of laser crystal is reduced to a certain extent, and still, crystal local temperature difference caused by dropping heat inequality is larger, and fuel factor is still
It is so obvious, still there is considerable influence for going out light quality.
In addition, in order to obtain the laser of specific wavelength, generally require to design complex optical resonator, and these chambers
Type is complicated, higher to optical path adjusting technical requirements, therefore, to obtain stable optics output, will become relatively difficult,
Therefore, for fuel factor problem should be overcome to solve the problems, such as that optical path adjusting just becomes very urgent again under complicated resonator.
The content of the invention
The brand-new solid laser system method that the present invention designs to solve the difficult technical problem of existing light modulation.
The automatic temperature-controlled automatic light modulating method of a kind of solid-state laser apparatus provided by the invention, including：
It is brilliant that laser pumping apparatus 1-1, input mirror 2-1, the first three-dimensional adjustment platform 2-11, laser are set gradually according to optical path direction
Body 2-3, temperature control device 2-31, the second three-dimensional adjustment platform 2-32, outgoing mirror 2-2, the 3rd three-dimensional adjustment platform 2-21, detection device 3-
1 and computer control system 4-1；
Wherein, the described first three-dimensional adjustment platform 2-11 is used for the position for adjusting the input mirror 2-1, and the 3rd three-dimensional is adjusted
Whole 2-21 is used for the position for adjusting the outgoing mirror 2-2；The laser crystal 2-3 and temperature control device 2-31 are located at described second
On three-dimensional adjustment platform 2-32, the described second three-dimensional adjustment platform 2-32 is used to adjust the laser crystal 2-3 and temperature control device 2-31
Position；
The laser pumping apparatus 1-1 is to hold pump mode emission pumping light beam to Er:YAG crystal 2-3, the 1640nm of acquisition
Laser, the laser from outgoing mirror 2-2 export；Export laser and inject detection device 3-1, the detection device 3-1 by optics
Signal inputs computer control system 4-1 after being converted into electrical signal, and the computer control system 4-1 is according to the electrical signal
First control signal is formed to the described first three-dimensional adjustment platform 2-11 automatic adjustments, forms second control signal to the described 2nd 3
Dimension adjustment platform 2-32 automatic adjustments, form the 3rd control signal to the described 3rd three-dimensional adjustment platform 2-21 automatic adjustments；
The temperature signal of the laser crystal 2-3 is inputted the computer control system 4-1 by the temperature control device 2-31,
The computer control system 4-1 forms the 4th control signal according to the temperature signal, and the 4th control signal controls institute
The temperature of temperature control device 2-31 is stated so as to ensure that the temperature of the laser crystal 2-3 is consistent with preset value.
Further, the temperature control device 2-31 includes：
At least one temperature sensor, the temperature for exploring laser light crystal 2-3；
Cooling device, including：Tight laser crystal 2-3 heat sink and with the heat sink temperature control system being connected
System.
Further, the temperature control system is water-cooling system；The computer control system 4-1 receives the temperature letter
After number, compared with the simulation model prestored, according to comparative result, water pump control signal is produced, is controlled according to control signal
The pressure of water pump system and then the flow velocity for controlling cooling water.
Further, it is described it is heat sink be micro-channel heat sink, the microchannel in the snakelike setting of single channel or multichannel side by side
Set.
Further, the temperature control system is conductor refrigeration system；The computer control system 4-1 receives described
After temperature signal, compared with the simulation model prestored, according to comparative result, voltage control signal is produced, according to voltage control
The temperature value of signal control conductor refrigeration system processed.
Further, described " according to comparative result, producing voltage control signal " includes：Crystal temperature effect value is more than 0 DEG C small
When 10 DEG C, set and control voltage as 40V；When crystal temperature effect value is more than 10 DEG C less than 45 DEG C, sets and control voltage as 52V；It is brilliant
When body temperature angle value is more than 45 DEG C less than 60 DEG C, sets and control voltage as 69V.
Further, the described first three-dimensional adjustment platform 2-11, the second three-dimensional adjustment platform 2-32, the 3rd three-dimensional adjustment platform 2-21
Front, rear, left and right can be carried out, bow and face upward six directions adjusting.
Beneficial effects of the present invention：The present invention is by front and rear hysteroscope and laser crystals setting adjust automatically platform, effectively
The defects of solving the technical problem of optical resonator light modulation, avoiding artificial regulation technology, and saved light modulation cost.Together
When, with reference to existing cooling technology, by the automatic temperature-controlled monitoring system of computer, can real-time automatic monitoring crystal temperature effect, and
With reference to the crystal temperature effect of simulation and the matching relationship of amount of cooling water, realize it is temperature automatically controlled, so as to ensure that the substantially permanent of crystal temperature effect
Fixed, the optics output to realize stable creates conditions, and then obtains preferable beam quality.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is the structure diagram of the generating means of Solid State Laser under room temperature of the present invention.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing into
One step it is described in detail, it is clear that described embodiment only part of the embodiment of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
All other embodiment, belongs to the scope of protection of the invention.
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
As shown in Figure 1, the automatic temperature-controlled automatic light modulating method of a kind of solid-state laser apparatus provided by the invention, including：According to light
Road direction sets gradually laser pumping apparatus 1-1, input mirror 2-1, the first three-dimensional adjustment platform 2-11, laser crystal 2-3, temperature control dress
Put 2-31, the second three-dimensional adjustment platform 2-32, outgoing mirror 2-2, the 3rd three-dimensional adjustment platform 2-21, detection device 3-1 and computer
Control system 4-1；
Wherein, the described first three-dimensional adjustment platform 2-11 is used for the position for adjusting the input mirror 2-1, and the 3rd three-dimensional is adjusted
Whole 2-21 is used for the position for adjusting the outgoing mirror 2-2；The laser crystal 2-3 and temperature control device 2-31 are located at described second
On three-dimensional adjustment platform 2-32, the described second three-dimensional adjustment platform 2-32 is used to adjust the laser crystal 2-3 and temperature control device 2-31
Position；
The laser pumping apparatus 1-1 is to hold pump mode emission pumping light beam to Er:YAG crystal 2-3, the 1640nm of acquisition
Laser, the laser from outgoing mirror 2-2 export；Export laser and inject detection device 3-1, the detection device 3-1 by optics
Signal inputs computer control system 4-1 after being converted into electrical signal, and the computer control system 4-1 is according to the electrical signal
First control signal is formed to the described first three-dimensional adjustment platform 2-11 automatic adjustments, forms second control signal to the described 2nd 3
Dimension adjustment platform 2-32 automatic adjustments, form the 3rd control signal to the described 3rd three-dimensional adjustment platform 2-21 automatic adjustments；
The temperature signal of the laser crystal 2-3 is inputted the computer control system 4-1 by the temperature control device 2-31,
The computer control system 4-1 forms the 4th control signal according to the temperature signal, and the 4th control signal controls institute
The temperature of temperature control device 2-31 is stated so as to ensure that the temperature of the laser crystal 2-3 is consistent with preset value.
Optionally, the temperature control device 2-31 includes：
At least one temperature sensor, the temperature for exploring laser light crystal 2-3；
Cooling device, including：Tight laser crystal 2-3 heat sink and with the heat sink temperature control system being connected
System.
Laser pumping apparatus 1-1 described in present embodiment is 1.9 μm and singly mixes thulium Tm optical fiber lasers, and one 1.9 μm are singly mixed
After the laser beam of thulium Tm optical fiber lasers 1-1 transmittings is coupled by the first coupled system, enter after being transmitted via plane input mirror 2-1
It is incident upon the crystal 2-3 for singly mixing Er or Ho；After fiber laser beam incident to its crystal 2-3 absorbs, swashing for 2 mum wavelengths is produced
Light, the laser light incident of 2 mum wavelength export Er or Ho laser to plano-concave outgoing mirror 2-2 by plano-concave outgoing mirror 2-2；
Singly mix Ho crystal 2-3 and Ho can be selected:YAP crystal, its thang-kng axis are c-axis, length 50mm；Ho3+ doping concentrations are
0.3at.%.1.9 μm of launch wavelengths for singly mixing thulium T m optical fiber lasers are 1940nm, singly mix the plano-concave outgoing mirror of Ho lasers
Radius of curvature is -200mm, and the transmitance to 2 μm of light is 30%.
1.9 μm are singly mixed laser diode, conduction optical fiber, double clad photosensitive light of the thulium Tm optical fiber lasers 1-1 by 792nm
Fine, fiber grating and thulium Tm silica fibres composition is singly mixed, fiber grating is arranged in the transmission path of double clad light-sensitive optical fibre,
The laser of the 792nm of the laser diode transmitting of 792nm is transmitted through conducting optical fiber, double clad light-sensitive optical fibre and fiber grating,
After coverlet mixes the absorption of thulium Tm silica fibres again, 1.9 μm of laser are produced, singly mix swashing for thulium Tm optical fiber lasers transmitting as 1.9 μm
Light beam；Conduction optical fiber is welded to connect with double clad light-sensitive optical fibre, and double clad light-sensitive optical fibre connects with singly mixing the welding of thulium Tm silica fibres
Connect.
1.9 μm of matrix for singly mixing thulium Tm optical fiber lasers include fluorine-based, silicon substrate and ZBLAN glass, use fiber grating pair
The launch wavelength for singly mixing 1.9 μm of laser of thulium Tm silica fibres transmitting is controlled, with the absorption ripple with singly mixing Ho laser crystals
Length matches.The doped substrate of single doping Ho laser crystals includes lithium yttrium fluoride YLF, lithium lutetium fluoride LuLF, yttrium aluminate YAP, gold-plating
Aluminium garnet LuAG, Yttrium Orthovanadate YVO4 and yttrium aluminium garnet YAG.
1.9 μm are singly mixed thulium Tm optical fiber lasers using the laser diode-pumped of 792nm.The fibre core of double clad light-sensitive optical fibre
A diameter of 25 μm, cladding diameter be 250 μm, conduction optical fiber and double clad light-sensitive optical fibre pass through optical fiber fusion welding technology welding.Optical fiber
Grating is the femtosecond Bragg reflection grating FBG that is inscribed using femtosecond fs laser writings technology in double clad light-sensitive optical fibre, optical fiber
Grating diffration centre wavelength is corresponding with singly mixing Ho absorption of crystal peak.Double clad light-sensitive optical fibre leads to singly mixing thulium Tm silica fibres
Optical fiber fusion welding technology to be crossed to be welded together, the core diameter for singly mixing thulium Tm silica fibres is 25 μm, and cladding diameter is 250 μm, and
And pressure cooling is carried out to it using fan.
In present embodiment, the laser of the 792nm of laser diode transmitting is through conducting optical fiber and double clad light-sensitive optical fibre
Transmission after coverlet mix the absorption of thulium Tm silica fibres, after the power of 792nm laser reaches the threshold value of optical fiber laser, in optical fiber
Under the action of grating, optical fiber laser exports 1.9 μm of laser of the wavelength that matches with Ho absorption of crystal peak.
In the present embodiment, temperature control adjusting apparatus 2-31 includes：At least one temperature sensor, for exploring laser light crystal 2-
3 temperature；The quantity of the temperature sensor is benefit with 5-10, is evenly distributed on around crystal, it is preferred that temperature sensor
It can be arranged among heat sink, corresponding blind hole is offered in heat sink, temperature sensor is arranged in blind hole.Cooling device, bag
Include：Tight laser crystal 2-3 heat sink and with the heat sink temperature control system being connected, it is heat sink to pass through heat conduction in crystal
Material (such as indium) wraps up.
The temperature control system can be water-cooling system；After the computer control system 4-1 receives the temperature signal,
Compared with the simulation model prestored, according to comparative result, water pump control signal is produced, water pump system is controlled according to control signal
The pressure of system and then the flow velocity for controlling cooling water, analog information parameter include the current temperature value of crystal current location, water flow velocity
Degree reduces temperature value etc. with evacuating crystal in calorie value, or unit interval in the unit interval.Wherein, the microchannel is in single-pass
The snakelike setting in road or multichannel are arranged side by side.Serpentine channel is cascaded structure, and multichannel is arranged side by side as parallel-connection structure.
The temperature control system can also be conductor refrigeration system；The computer control system 4-1 receives the temperature
After spending signal, compared with the simulation model prestored, according to comparative result, voltage control signal is produced, is controlled according to voltage
Signal controls the temperature value of conductor refrigeration system.Current temperature value of the analog information parameter including crystal current location,
Cooling capacity parameter (such as electric current, voltage, unit interval cooling capacity) of semiconductor cooler etc..According to comparative result, production
Giving birth to voltage control signal is specially：When crystal temperature effect value is more than 0 DEG C less than 10 DEG C, sets and control voltage as 36-42V, it is preferable that
40V；When crystal temperature effect value is more than 10 DEG C less than 45 DEG C, sets and control voltage as 48-55V, preferably 52V；Crystal temperature effect value is more than
45 DEG C be less than 60 DEG C when, set and control voltage as 65-80V, preferably 69V.
In addition, the first three-dimensional adjustment platform 2-11, the second three-dimensional adjustment platform 2-32, the 3rd three-dimensional adjustment platform 2-21 can be with
Front, rear, left and right are carried out, bow and face upward six directions adjusting.The three-dimensional adjustment platform includes stepper motor, turntable, and compass is described
Stepper motor, which is realized, is adjusted all around moving for device, and turntable realizes the pitching for being adjusted device, and quarter is provided with compass
Degree, there is provided amount of movement refers to.Wherein, can when the first three-dimensional adjustment platform 2-11, the 3rd three-dimensional adjustment platform 2-21 are adjusted
First the described first three-dimensional adjustment platform is adjusted the described 3rd three-dimensional adjustment platform is adjusted or first to the described 3rd 3 again
Dimension adjustment platform, which is adjusted, is again adjusted the described first three-dimensional adjustment platform, finally adjusts the second three-dimensional adjustment platform 2-32, from
And the output beam of ideal beam quality is obtained, the adjustment is carried out according to default computation model.
To sum up, the present invention is by the way that to front and rear hysteroscope and laser crystals setting adjust automatically platform, it is humorous effectively to solve optics
The defects of shaking the technical problem of intonation light, avoiding artificial regulation technology, and saved light modulation cost.Meanwhile with reference to existing
Cooling technology, by the automatic temperature-controlled monitoring system of computer, can real-time automatic monitoring crystal temperature effect, and combine the crystalline substance of simulation
The matching relationship of temperature and amount of cooling water, realizes temperature automatically controlled, so as to ensure that the substantially constant of crystal temperature effect, stablizes to realize
Optics output create conditions, and then obtain preferable beam quality.
Device embodiment described above is only schematical, wherein the unit illustrated as separating component can
To be or may not be physically separate, physics list is may or may not be as the component that unit is shown
Member, you can with positioned at a place, or can also be distributed in multiple network unit.It can be selected according to the actual needs
In some or all of module realize the purpose of this embodiment scheme.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
Realized by the mode of software plus required general hardware platform, naturally it is also possible to pass through hardware.Based on such understanding, on
The part that technical solution substantially in other words contributes to the prior art is stated to embody in the form of software product, should
Computer software product can store in a computer-readable storage medium, such as ROM/RAM, magnetic disc, CD, including some fingers
Order is used so that a computer equipment (can be personal computer, server, or network equipment etc.) performs each implementation
Method described in some parts of example or embodiment.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
To modify to the technical solution described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical solution spirit and
Scope.
Claims (7)
- A kind of 1. automatic temperature-controlled automatic light modulating method of solid-state laser apparatus, it is characterised in that including：Laser pumping apparatus (1-1), input mirror (2-1), the first three-dimensional adjustment platform (2-11), laser are set gradually according to optical path direction Crystal (2-3), temperature control device (2-31), the second three-dimensional adjustment platform (2-32), outgoing mirror (2-2), the 3rd three-dimensional adjustment platform (2- 21), detection device (3-1) and computer control system (4-1)；Wherein, the described first three-dimensional adjustment platform (2-11) is used for the position for adjusting the input mirror (2-1), and the 3rd three-dimensional is adjusted Whole (2-21) is used for the position for adjusting the outgoing mirror (2-2)；The laser crystal (2-3) and temperature control device (2-31) are located at On described second three-dimensional adjustment platform (2-32), the described second three-dimensional adjustment platform (2-32) is used to adjust the laser crystal (2-3) With the position of temperature control device (2-31)；The laser pumping apparatus (1-1) obtains oscillating laser to hold pump mode emission pumping light beam to laser crystal (2-3), The laser is exported from outgoing mirror (2-2)；Export laser and inject detection device (3-1), the detection device (3-1) believes optics Computer control system (4-1) is inputted after number being converted into electrical signal, the computer control system (4-1) is believed according to the electricity Number first control signal adjustment platform (2-11) automatic adjustment three-dimensional to described first is formed, form second control signal to described the Two three-dimensional adjustment platform (2-32) automatic adjustments, form the 3rd control signal and the described 3rd three-dimensional adjustment platform (2-21) are adjusted automatically Section；The temperature signal of the laser crystal (2-3) is inputted the computer control system (4- by the temperature control device (2-31) 1), the computer control system (4-1) forms the 4th control signal, the 4th control signal control according to the temperature signal The temperature of the temperature control device (2-31) is made so as to ensure that the temperature of the laser crystal (2-3) is consistent with preset value.
- 2. according to the method described in claim 1, it is characterized in that, the temperature control device (2-31) includes：At least one temperature sensor, the temperature for exploring laser light crystal (2-3)；Cooling device, including：Tight laser crystal (2-3) heat sink and with the heat sink temperature control system being connected.
- 3. according to the method described in claim 2, it is characterized in that, the temperature control system is water-cooling system；The computer control After system (4-1) processed receives the temperature signal, compared with the simulation model prestored, according to comparative result, water is produced Control signal is pumped, the pressure of water pump system is controlled according to control signal and then controls the flow velocity of cooling water.
- 4. according to the method described in claim 3, it is characterized in that, it is described it is heat sink be micro-channel heat sink, the microchannel is in single The snakelike setting of passage or multichannel are arranged side by side.
- 5. according to the method described in claim 2, it is characterized in that, the temperature control system is conductor refrigeration system；The meter After calculation machine control system (4-1) receives the temperature signal, compared with the simulation model prestored, according to comparative result, Voltage control signal is produced, the temperature value of conductor refrigeration system is controlled according to voltage control signal.
- According to the method described in claim 5,6. it is characterized in that, described " according to comparative result, producing voltage control signal " Including：When crystal temperature effect value is more than 0 DEG C less than 10 DEG C, sets and control voltage as 40V；Crystal temperature effect value is more than 10 DEG C and is less than 45 DEG C When, set and control voltage as 52V；When crystal temperature effect value is more than 45 DEG C less than 60 DEG C, sets and control voltage as 69V.
- 7. according to any methods of claim 1-6, it is characterised in that the described first three-dimensional adjustment platform (2-11), second Three-dimensional adjusts platform (2-32), the 3rd three-dimensional adjustment platform (2-21) can carry out front, rear, left and right, bowing and facing upward six directions is adjusted.
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Cited By (1)
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| CN114400494A (en) * | 2021-12-30 | 2022-04-26 | 广东职业技术学院 | Automatic dimming method for laser |
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| CN107908207B (en) | 2018-10-30 |
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