CN103682967A - Addressing pump capable of achieving amplification of variable-angle incident laser - Google Patents
Addressing pump capable of achieving amplification of variable-angle incident laser Download PDFInfo
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- CN103682967A CN103682967A CN201310698912.6A CN201310698912A CN103682967A CN 103682967 A CN103682967 A CN 103682967A CN 201310698912 A CN201310698912 A CN 201310698912A CN 103682967 A CN103682967 A CN 103682967A
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Abstract
The invention provides an addressing pump capable of achieving amplification of a variable-angle incident laser. The addressing pump comprises a pump array, a crystal, a coupling mirror, a reflecting mirror, an angular displacement sensor and a controller, wherein the crystal is opposite to the output end of the pump array; the coupling mirror is arranged between the output end of the pump array and one side of the crystal; the mirror surface of the reflecting mirror is opposite to the other side of the crystal; the angular displacement sensor is connected with the reflecting mirror; the controller is respectively connected with the angular displacement sensor and the pump array so as to regulate a light emitting region of the pump array according to angle changes of the reflecting mirror when the angular displacement sensor detects the angle changes of the reflecting mirror. According to the addressing pump capable of achieving amplification of the variable-angle incident laser, the angular displacement sensor can collect displacement information of the reflecting mirror, the controller carries out operation, an irradiation region is obtained after an incident angle is changed, full-time detection of a laser system is achieved, work is fed back in real time, and energy consumption of the pump is reduced.
Description
Technical field
The present invention relates to a kind of addressing pumping that varied angle incident laser is amplified that realizes.
Background technology
Laser came out so far from nineteen sixty, had obtained developing on an unprecedented scale, and because its brightness is high, monochromaticjty is good, collimation and good condensing performance, and in scientific research, military and national defense, industrial processes, astronomical observation and information pass the application widely that the fields such as ripple obtain.
Laser is generally to be produced by laserresonator, or output after laser amplifier amplifies.In oscillator～amplifier system, pulsewidth, beam divergence angle and spectral width depend primarily on resonant cavity, and pulse energy and power are determined by amplifier.If the energy of oscillator output when operation is lower, will reduces beam divergence angle, and spectral width is narrowed down.Therefore, oscillator～amplifier system is compared with independent oscillator, and the energy of its output is higher; Or when the energy of output beam is identical, beam divergence angle reduces, breadth of spectrum line narrows down.In general, to laser oscillator, add the object of amplifier, the brightness that increases exactly output beam.If need higher magnification ratio, will set up multistage amplification system.
When designing laser amplifier, must consider gain and the energy extracting, the wavefront distortion that amplifier causes and pulse shape distortion, the energy of optical element and power density in amplification system cause superradiance or front sharp feedback of penetrating in amplifier.When Design enlargement device, main consider be from amplifier the energy of obtainable gain and extraction.In amplifier, the length of rod depends primarily on required gain, and considers loss threshold values, and the diameter of rod depends primarily on needed output energy.
In the middle of practical application, the light distribution of laser is a principal element of restriction laser application.For example, at laser ablation manufacture field, just need to obtain light distribution and try one's best uniform flat top beam to reach optimal etching effect; And in the situation that needing Laser Focusing (as the coupling fiber of laser welding, laser), just wish to obtain the fundamental-mode gaussian beam that light distribution approaches Gaussian as far as possible, thereby improve the light intensity after Laser Focusing and reduce laser at the waist radius at focus place.Therefore, the control of Distribution of laser intensity is had to very important and real meaning.Current laser is all fixed angle incident, and laser is under severe environment for use, and light path may be subjected to displacement speculum because of vibrations, makes seed light can not get amplifying.At this moment the position of the seed light after displacement in amplifier changes, and need to make the distributed areas of pump light and light intensity change thereupon, makes to export optical mode constant.For example, when laser militarily uses, battlefield surroundings is conventionally more severe, and the variations in temperature of external environment condition is violent, stands to jolt in transportation; While using in industrial environment, face equally when ambient temperature variation is loaded and unloaded with workpiece greatly and produce vibration influence, these factors all may make laser inner member produce displacement, and light path is changed.Light path after change, can not be revised in time, makes laser parameters index reduction and even ineffective.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.
In view of this, the present invention need to provide a kind of addressing pumping that varied angle incident laser is amplified that realizes, and can improve the reliability of laser under severe environment for use.
Can realize according to an embodiment of the invention the addressing pumping that varied angle incident laser is amplified, comprise: pumping array; Crystal, described crystal is relative with the output of described pumping array; Coupling mirror, described coupling mirror is located between the output of described pumping array and a side of described crystal; Speculum, the minute surface of described speculum is relative with the opposite side of described crystal; Angular displacement sensor, described angular displacement sensor is connected with described speculum; And controller, described controller is connected with described pumping array with described angular displacement sensor respectively, while changing the angle of speculum to be detected at described angular displacement sensor, changes the light-emitting zone of adjusting described pumping array according to the angle of speculum.
Can realize according to an embodiment of the invention the addressing pumping that varied angle incident laser is amplified, adopt Design of Closed-Loop Control, angular displacement sensor can collect the displacement information of speculum, controller carries out computing and draws the irradiation area changing after incident angle, and the irradiation area by controller regulation and control pumping array, makes laser system accomplish full-time detection, Real-time Feedback work, reduce pumping energy consumption, improve the reliability of laser in severe environment for use, have high actual application value.
Can realize according to an embodiment of the invention the addressing pumping that varied angle incident laser is amplified, also there is following additional technical feature:
According to one embodiment of present invention, described controller comprises: computer connected with each other and pumping controller, and described computer is connected with described angular displacement sensor, and described pumping controller is connected with described pumping array.
According to one embodiment of present invention, the described coupling mirror face relative with described pumping array is provided with the anti-reflection film of pump light wavelength.
According to one embodiment of present invention, the described coupling mirror face relative with described crystal is provided with the anti-reflection film of pumping wavelength and the high-reflecting film of seed light wavelength.
According to one embodiment of present invention, the both sides of described crystal are provided with dual wavelength anti-reflection film.
According to one embodiment of present invention, can realize the addressing pumping that varied angle incident laser is amplified further comprises: eyeglass fixture, described eyeglass fixture is connected to fix described speculum with described speculum, and described eyeglass fixture is connected with described angular displacement sensor.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is the structural representation of realizing the addressing pumping that varied angle incident laser is amplified according to an embodiment of the invention;
Fig. 2 is the angular displacement sensor of addressing pumping and the connection diagram of speculum that varied angle incident laser is amplified that realize according to an embodiment of the invention;
Fig. 3 is the schematic diagram of realizing the pumping array of the addressing pumping that varied angle incident laser is amplified according to an embodiment of the invention, and it shows the arrangement of pumping array, a plurality of little pump light source arrays, consists of.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
Embodiments of the invention are hereinafter described with reference to the accompanying drawings.Attention is example at the embodiment of this description, and the present invention is not limited to the embodiment of the description here.Dimensional thickness in figure etc. is to illustrate for the ease of understanding in addition, so accompanying drawing not always matches with real structure.
As shown in Figure 1, can realize according to an embodiment of the invention the addressing pumping 100 that varied angle incident laser is amplified, comprise: pumping array 10, crystal 20, coupling mirror 30, speculum 40, angular displacement sensor 50 and controller 60.
Particularly, crystal 20 can be relative with the output of pumping array 10.Pumping array 10 can irradiate for laser amplifier provides the addressable pump light that energy is higher.Coupling mirror 30 is located between the output of pumping array 10 and a side of crystal 20.The minute surface of speculum 40 is relative with the opposite side of crystal 20.Angular displacement sensor 50 is connected with speculum 40, with the rotational angle of detection of reflected mirror 40.Controller 60 can be connected with pumping array 10 with angular displacement sensor 50 respectively, while changing the angle of speculum 40 to be detected at angular displacement sensor 50, changes the light-emitting zone of adjusting pumping array 10 according to the angle of speculum 40.
Can realize according to an embodiment of the invention the addressing pumping 100 that varied angle incident laser is amplified, adopt Design of Closed-Loop Control, angular displacement sensor 50 can collect the displacement information of speculum 40, controller 60 carries out computing and draws the irradiation area changing after incident angle, the light-emitting zone that regulates and controls pumping arrays 10 by controller 60 is to obtain corresponding irradiation area, make laser accomplish full-time detection, Real-time Feedback work, reduce pumping energy consumption, improve the reliability of laser in severe environment for use, have high actual application value.
Be understandable that, when laser internal structure changes because of external force or variations in temperature, cause speculum to send out 40 raw angular deflections, the incident angle of light that seed light reflects by speculum also changes thereupon, make to change at intracrystalline irradiation position, the light-emitting zone by adjusting pumping array is to adapt to the change of seed light position.Thereby raising laser energy, reduces pumping energy consumption.
As shown in Figure 1, according to one embodiment of present invention, controller 60 can comprise: computer 61 connected with each other and pumping controller 62, and computer 61 can be connected with angular displacement sensor 50, and pumping controller 62 can be connected with pumping array 10.Thus, can provide the reliability that can realize addressing pumping 100 work that varied angle incident laser is amplified.
According to one embodiment of present invention, the face that coupling mirror 30 is relative with pumping array 10 is provided with the anti-reflection film (not shown) of pump light wavelength.According to one embodiment of present invention, the face that coupling mirror 30 is relative with crystal 20 is provided with the anti-reflection film of pumping wavelength and the high-reflecting film of seed light wavelength.The both sides of crystal 20 are provided with dual wavelength anti-reflection film.Thus, light source loss can be dropped to minimum.
According to one embodiment of present invention, can realize the addressing pumping 100 that varied angle incident laser is amplified may further include: eyeglass fixture 70, state eyeglass fixture 70 and be connected with stationary mirror 40 with speculum 40, eyeglass fixture 70 is connected with angular displacement sensor 50.
Be understandable that, speculum 40 can change the light path of seed light, the seed light directive crystal 20 after change.The shaft core position that reflective mirror 40 may rotate with can be connected by angular displacement sensor 50, be for example connected with the top of angular displacement sensor 50.Pumping array 10 irradiates for laser amplifier provides the addressable pump light that energy is higher.Angular displacement sensor 50 is surveyed the position that speculum 40 changes angle.Machine 61 measuring and calculating as calculated, the pump light in pair array selectively changes irradiation area.The displacement of angular displacement sensor 50 detection of reflected mirrors 40, and signal is passed to computer 61 carry out the calculating of seed light incident angle.The irradiation area switching value that computer calculates passes to pumping controller 62, by pumping controller 62, converts switching value to switching signal to pumping array 10, and pumping array 10 is directly controlled.
It should be noted that, realizing of the embodiment of the present invention can comprise the addressing pumping 100 of varied angle incident laser amplification: angular displacement sensor 50, speculum 40 is arranged on eyeglass fixture 70.Angular displacement sensor 50 tops are connected with speculum 40, when speculum 40 rotates because of external force, it detects the angular displacement of speculum 40, and information is passed to computer 61 calculates, and calculates the irradiation area that seed light source occurs after Angulation changes through speculum 40; Speculum 40, the propagation path of change seed light, injects amplifier by seed light, and it is connected with angular displacement sensor 50; Coupling mirror 30, its face relative with pumping array 10 is coated with the anti-reflection film of pump light wavelength, the face relative with crystal 20 is coated with the anti-reflection film of pump light wavelength and the high-reflecting film of seed light wavelength, coupling mirror 30 can play logical pump light reflection seed light, makes seed light not enter pumping end and completely by crystal 20, be absorbed to raise the efficiency.Crystal 20, it is used for seed light to amplify, and two end faces are coated with dual wavelength anti-reflection film, and light source loss is dropped to minimum; Pumping array 10, it provides the pump light of amplification system, and owing to adopting array format, the pump energy providing is higher; Angular displacement sensor 50 passes to computer 61 by the speculum detecting 40 amount of spin information, and computer 61 calculates seed light and is subjected to displacement the angle variable quantity producing because of speculum 40.By computer 61, control pumping array 10 again and light new light-emitting zone.When speculum 40 changes angle because of certain reason, the position that now seed light is radiated at crystal 20 also changes, and pumping array 10 as calculated machine 61 is controlled, and lights the irradiation area that seed light is new.By the pump light after adjusting and seed light source, enter amplification crystal and amplify, can revise in real time pump light position, seed light is amplified in real time, reduce energy consumption.
The present invention carries out incident angle inspection, makes laser system accomplish full-time detection, and full-time feedback operation reduces pumping energy consumption, improves the reliability of laser in severe environment for use, has high actual application value.
Embodiments of the invention realize the addressing pumping 100 that varied angle incident laser is amplified, seed light is radiated on speculum 40, then is irradiated on amplifier through speculum 40.Angular displacement sensor 50 is arranged on speculum 40, when speculum 40 produces angular displacement because of vibration, angular displacement sensor 50 just can detect the generation of displacement, and signal is passed to computer 61, calculate seed light and be radiated at the new region on the crystal 20 in amplifier, by pumping controller 62, control pumping array 10 again, pump light is according to new seed light irradiation area transmitting pump light.This real-time pump mode can have imitates reduction pumping energy consumption.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that, in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (6)
1. can realize the addressing pumping that varied angle incident laser is amplified, it is characterized in that, comprise:
Pumping array;
Crystal, described crystal is relative with the output of described pumping array;
Coupling mirror, described coupling mirror is located between the output of described pumping array and a side of described crystal;
Speculum, the minute surface of described speculum is relative with the opposite side of described crystal;
Angular displacement sensor, described angular displacement sensor is connected with described speculum; And
Controller, described controller is connected with described pumping array with described angular displacement sensor respectively, while changing the angle of described speculum to be detected at described angular displacement sensor, changes the light-emitting zone of adjusting described pumping array according to the angle of described speculum.
2. the addressing pumping realizing the amplification of varied angle incident laser according to claim 1, it is characterized in that, described controller comprises: computer connected with each other and pumping controller, described computer is connected with described angular displacement sensor, and described pumping controller is connected with described pumping array.
3. the addressing pumping realizing the amplification of varied angle incident laser according to claim 1, is characterized in that, the face that described coupling mirror is relative with described pumping array is provided with the anti-reflection film of pump light wavelength.
4. the addressing pumping realizing the amplification of varied angle incident laser according to claim 1, is characterized in that, the face that described coupling mirror is relative with described crystal is provided with the anti-reflection film of pumping wavelength and the high-reflecting film of seed light wavelength.
5. the addressing pumping realizing the amplification of varied angle incident laser according to claim 1, is characterized in that, the both sides of described crystal are provided with dual wavelength anti-reflection film.
6. the addressing pumping realizing the amplification of varied angle incident laser according to claim 1, it is characterized in that, further comprise: eyeglass fixture, described eyeglass fixture is connected to fix described speculum with described speculum, and described eyeglass fixture is connected with described angular displacement sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310698912.6A CN103682967A (en) | 2012-12-28 | 2013-12-18 | Addressing pump capable of achieving amplification of variable-angle incident laser |
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| CN201210586320 | 2012-12-28 | ||
| CN201210586320.0 | 2012-12-28 | ||
| CN201310698912.6A CN103682967A (en) | 2012-12-28 | 2013-12-18 | Addressing pump capable of achieving amplification of variable-angle incident laser |
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| CN103682967A true CN103682967A (en) | 2014-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115327560A (en) * | 2022-08-11 | 2022-11-11 | 天津市特种设备监督检验技术研究院(天津市特种设备事故应急调查处理中心) | Device and method for detecting natural glide quantity of fork of forklift based on laser reflection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115327560A (en) * | 2022-08-11 | 2022-11-11 | 天津市特种设备监督检验技术研究院(天津市特种设备事故应急调查处理中心) | Device and method for detecting natural glide quantity of fork of forklift based on laser reflection |
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