CN109143572A - Beam laser system and method are closed for the bundling device of pulse laser, pulse - Google Patents
Beam laser system and method are closed for the bundling device of pulse laser, pulse Download PDFInfo
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- CN109143572A CN109143572A CN201811084011.7A CN201811084011A CN109143572A CN 109143572 A CN109143572 A CN 109143572A CN 201811084011 A CN201811084011 A CN 201811084011A CN 109143572 A CN109143572 A CN 109143572A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0977—Reflective elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
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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
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Abstract
Present invention relates particularly to a kind of bundling devices for pulse laser and pulse to close beam laser system and method.In order to overcome existing pulse sequence to close in beam, required transmission-type element is difficult to adapt to long-time high power laser light, or the defect that laser beam quality has an impact after other conjunctions Shu Fangfa meeting pairing beam, the present invention provides a kind of bundling devices for pulse laser, the shift unit set gradually including at least two along output light path, it is set on shift unit, for enabling pulse laser after beam is closed in space along the reflecting mirror of output light path outgoing.A kind of pulse conjunction beam laser system, including multiple bundling devices, pulse laser and mirror of turning back emit laser by setting timing, and mirror of being turned back, which is turned back, is incident to reflecting mirror formation conjunction Shu Jiguang.A method of for pulse laser beam combining, comprising the following steps: 1) pulse laser is emitted after reflecting mirror reflects along output light path (4)；2) each reflecting mirror is movable into and out output light path and does not stop rear.
Description
Technical field
The invention belongs to laser technology fields, and in particular to a kind of to close Shu Jiguang for the bundling device of pulse laser, pulse
Laser power and repetition parameter can be improved in system and method.
Background technique
With the continuous development and maturation of laser technology, high power laser light, which has, to be more and more widely used, profoundly shadow
The development of multiple industries is rung.It is divided by working method, high power laser light is broadly divided into high-peak power laser (i.e. high energy pulse
Laser) and high-average power laser.
For high energy pulse laser, requires laser that there is certain repetition rate in a variety of application fields, however directly mention
The repetition rate of high high energy pulse laser operation, it will serious fuel factor is generated, to influence the performance of laser, even
Lead to laser output pulse energy decline or cannot work.For high-average power laser, application demand exports laser
Power constantly proposes requirements at the higher level, and single laser power ascension is limited, it is difficult to realize higher average output power.Therefore,
Either for high energy pulse laser still for high-average power laser, the repetition rate for improving pulse laser is all to need to solve
Certainly the problem of.
Separate unit laser realizes the output of high power, high light beam quality and higher efficiency, can be increased due to power, light beam matter
There is non-linear decline in amount, and nonlinear relationship is extremely complex, therefore, under the conditions of adhoc basis, the ability of separate unit output
Always be limited, but people's demand that " three high " laser is exported be it is endless, to realize more powerful output, then most preferably
Approach is exactly multiple-beam synthesis technology.
It includes that beam is closed in coherently combined, spectrum beam combination and pulse laser timesharing that existing light beam, which closes Shu Fangfa,.In March, 2015 exists
" the Incoherent beam combining technical research of pulse laser " delivered in " laser technology " discloses a kind of based on turntable rotation realization arteries and veins
The method of impulse combiner will shift after the crystal of the laser oblique incidence of different timing to different-thickness, reflect through crystal
Coaxial line exports afterwards, realizes the conjunction beam of pulse laser, achievees the purpose that improve laser output repetition rate and mean power.It is this
Scheme the problem is that, light laser needs to transmit by crystal, and the ability that optical element bears laser power is limited, it is difficult to full
The incident of sufficient high power high energy laser requires.
Chinese invention patent application 201210078189.7 discloses a kind of pulse laser beam combining method, proposes one kind and adopts
With the mode of rotating mirror, the lower repetitive frequency pulsed laser beam of multi beam is synthesized into a branch of high repeat frequency pulsed laser
Beam, reflective optical components, the light channel structure of this method use are simple, and synthesis light beam can have very high power.According to it
Technical effect description, all optical elements of polygon prism system can be reflective optical devices, which can bear arbitrarily
Superpower laser, as long as the laser power of input is sufficiently high, so that it may export any high power pulsed laser beam.But it is this
Scheme the problem is that, between pulse laser goes out the photophase, due to reflecting mirror it is continuous movement bring synthesis beam quality under
Drop, for example when the pulse duration is millisecond (ms) magnitude, which constantly moves bring synthesis light beam due to reflecting mirror
Quality declines 1/10 magnitude, affects its popularization and application.
Summary of the invention
It is an object of the present invention to which required transmission-type element is difficult to fit in order to overcome existing pulse sequence to close in beam
The defect that laser beam quality has an impact after answering long-time high power laser light or other conjunctions Shu Fangfa pairing beam, and provide
It is a kind of to close beam laser system for the bundling device of pulse laser and pulse, substantially increase the average output power of single laser
And repetition rate, and keep the beam quality of original laser constant substantially, and have good power and number of lasers to expand
Malleability.
The technical scheme is that
A kind of bundling device for pulse laser, the reflecting mirror being obliquely installed including more along output light path；According to setting
The multi beam pulse laser of timing transmitting is emitted after corresponding reflecting mirror reflects and closes beam along the same output light path；The reflection
Mirror is arranged on shift unit, the described shift unit generation movement so that reflecting mirror according to pulse laser match when
Sequence is movable into and out output light path, and on the laser emitting direction of output light path, the reflecting mirror in front position will not hinder
Keep off the outgoing beam of rear position reflecting mirror.
Further, in the bundling device of above-mentioned pulse laser, the shift unit is several only according to timing control
Automatically controlled displacement platform.
Further, in the bundling device of above-mentioned pulse laser, the automatically controlled displacement platform is along the side perpendicular to output light path
To movement.
Further, in the bundling device of above-mentioned pulse laser, the automatically controlled displacement platform is driven using lead screw, cylinder or hydraulic cylinder
It is dynamic.
Further, in the bundling device of above-mentioned pulse laser, the angle of the reflecting mirror and output light path is 30-60 degree,
Angle between each reflecting mirror and output light path can be different, but are the need to ensure that pulse laser after reflecting mirror reflects
It is emitted along same output light path.
Further, in the bundling device of above-mentioned pulse laser, the angle of the reflecting mirror and output light path is 45 degree.
A kind of pulse conjunction beam laser system, is characterized in that including n pulse laser and n reflecting mirror, pulse
Laser forms conjunction beam laser emitting by being incident to reflecting mirror, wherein n is greater than 1 according to the timing shoot laser of setting
Positive integer.
Further, it further includes mirror of only turning back that beam laser system is closed in above-mentioned pulse；Shoot laser is after mirror of turning back is turned back
It is incident to reflecting mirror.
A method of for pulse laser beam combining, it is characterized in that, comprising the following steps:
1) at least two lasers export on edge after the reflection of respective reflecting mirror according to the pulse laser of setting timing transmitting
Optical path outgoing；
2) each reflecting mirror is movable into and out output light path according to the timing that pulse laser matches, and in output light path
On laser emitting direction, the reflecting mirror in front position will not stop the light beam of rear position reflecting mirror.
Further, the pulse laser in the step 1) first passes through after catadioptric mirror reflects again through the reflection of reflecting mirror.
Beneficial effects of the present invention:
1, the present invention is by more reflecting mirrors being arranged in same output light path, and according to pulse laser emission timing phase
Matching timing is removed and is moved into, and pulse laser beam combining is realized, before not changing original laser beam characterisitic parameter
It puts, substantially increases the power and repetition rate of output laser, and the extension of quantity can be carried out, this mode for closing beam does not have
The upper limit of the power has important application value in industry and other field；
2, reflecting mirror of the invention and other light path devices use total reflection mode, when avoiding using transmissive optical element
Existing device tolerance power is limited and to the deficiency that beam quality has an impact, and goes out light especially suitable for high-power, long-time
The case where, close beam implement in the parameter of incident laser will not be generated expand, the added influences such as shrink beam, it is ensured that close laser after beam
Beam quality.
Detailed description of the invention
Fig. 1 is operation principle schematic diagram of the present invention for the bundling device of pulse laser；
Fig. 2 is the timing diagram of n pulse laser before pulse laser beam combining of the present invention；
Fig. 3 is the output power schematic diagram of laser after pulse laser beam combining of the present invention；
Fig. 4 is the bundling device reflecting mirror shifting principle schematic diagram that the embodiment of the present invention is used for pulse laser；
Fig. 5 is that beam laser system theory of constitution schematic diagram is closed in pulse of the present invention；
Fig. 6 is that beam laser system theory of constitution schematic diagram is closed in the pulse of the embodiment of the present invention；
Description of symbols:
1-shift unit；2-reflecting mirrors；3-incoming laser beams；4-output light paths；5-displacement control units；6-electricity
Control displacement platform；7-laser timing control units；8-synchronous triggering signals；9-pulse lasers；10-turn back mirror.
Specific embodiment
It elaborates below in conjunction with the drawings and specific embodiments to the present invention.
As shown in Figure 1, Figure 2 and Figure 3, the principle thinking of beam is closed in pulse of the present invention is: tilting and sets on same output light path 4
It is equipped with n reflecting mirror 2, every reflecting mirror 2 is arranged on shift unit 1, and can be along making shifting mirror direction of the reflecting mirror 2 in figure
3 remove combined beam light roads and move back to combined beam light road again, and combined beam light road is output light path 4；Shift unit can be one it is whole
Body mechanism or seperated mechanism are, it can be achieved that every reflecting mirror 2 independently moves in and out.
Every reflecting mirror 2 is corresponding with incoming laser beam 3, and wherein laser is the pulse laser of repetition output, every laser
Go out light sequential as shown in Fig. 2, can using the scheme of " the Incoherent beam combining technical research of pulse laser " in background technique, by
Programmable logic array generates pulsewidth, frequency and the satisfactory electric signal of time delay, then drives seed laser with this electric signal
Device simultaneously amplifies or the mode of driving pulse pumping laser, when so that the light pulse of every laser output keeping different
Prolong, the requirement of beam is closed with coincidence pulse.
In Fig. 1 while n laser is incident to corresponding reflecting mirror 2, shift unit 1 is according to incident timing by reflecting mirror
2 remove and are moved back to original position according to the timing of setting, so that the reflecting mirror 2 in front will not when the laser reflection output of rear incident
Stop subsequent incident beam, so as to realize the conjunction beam of multi beam pulse laser.Such as the light pulse ratio 1# that goes out of 2# laser has
Certain delay, as long as the 1# reflecting mirror of front is removed by shift unit, makes it not when 2# laser light incident to 2# reflecting mirror
When being blocked in optical path, then combined beam light road has and the only beam of laser i.e. pulse laser of 2# this moment；Similarly, 3# laser go out
The light pulse ratio 2# certain delay of attachment again, when 3# laser light incident to 3# reflecting mirror, as long as the 1# reflecting mirror and 2# of front
When reflecting mirror is removed by shift unit and is not blocked in optical path, then the laser that combined beam light road exports this moment is the arteries and veins of 3#
Impulse light, and so on, recirculated after whole lasers are successively incident, then since 1#, then just obtained as
Gao Zhongying or quasi-continuous lasing output shown in Fig. 3.
When practical application, by the movement retardance of shift mechanism, front reflecting mirror inevitably can be to rear when reflecting mirror shifts
There is small part barrier effect in side, it is difficult to accomplish seamless timing synthesis, therefore be difficult to accomplish continuously to export, but can accomplish quasi-continuous
Export or improve the repetition rate of original laser.Since every pulse laser is that certain duty ratio exports, in this way after conjunction beam
Laser is the synthesis of n laser, and average laser power is the sum of all n average laser powers, to greatly improve laser
Output mean power, while reflect light beam be in it is coaxial, and close beam after beam quality will not because reflecting mirror movement due to send out
Changing, these all determine that the laser after closing beam can be with high efficiency, the distance transmission of high quality and transmission.
The meaning that beam is closed in this pulse is: either for Solid State Laser, optical-fiber laser or semiconductor laser, by
To the influence of nonlinear effect and fuel factor, it is difficult to improve the mean power output of single laser, especially for continuous defeated
Laser out.And the purpose for using pulse to close beam is, single laser is made into and is exported with certain repetition rate, and is accounted for
Empty smaller pulse laser, although being influenced by nonlinear effect and fuel factor, mean power can not too high, arteries and veins
Rushing peak power can be very high.Then the scheme for closing beam by pulse again, adjusts the pulse sequence characteristic of every laser, then leads to
Bundling device of the invention is crossed, n beam is swashed into combiner and is exported as Gao Zhongying laser or quasi-continuous lasing, due to improving output power
N times, and still keep original beam quality, and theoretically this mode for closing beam does not have the upper limit of the power, in industry and its
He has important application value in field.
As shown in figure 4, shift unit 1 several in the embodiment of the present invention electrically connects with displacement control unit 5
Automatically controlled displacement platform 6, automatically controlled displacement platform 6 is using lead screw transmission or the working method of cylinder, hydraulic cylinder, in displacement control unit 5
Under control, corresponding reflecting mirror 2 is successively driven to remove output light path 4 according to timing, then moves back to original position again, and really
The reflecting mirror 2 protected before each moment optical path will not stop subsequent light beam, can only have beam of laser along output in synchronization
The output of 4 direction of optical path.Simultaneously in order to match with the output timing of laser, displacement control unit 5 exports synchronous triggering signal 8
It is real to laser timing control unit 7 or the output synchronous triggering signal 8 of laser timing control unit 7 to displacement control unit 5
The displacement of existing reflecting mirror 2 and the matching of pulse laser timing.The mirror surface of reflecting mirror 2 is plane, and the angle with output light path 4 is
30-60 degree, preferably 45 degree, automatically controlled displacement platform 6 are movable into and out output light path 4 according to the direction perpendicular to output light path 4.
If effective incident area (area i.e. after clinographic projection) of reflecting mirror is much larger than the hot spot of laser beam, from swashing
To finish time at the time of light pulse originates, reflecting mirror has been in reciprocating movement state under the action of automatically controlled displacement platform,
And laser pulse width and velocity of displacement are controlled to ensure that incident beam will not leak out mirror surface.If reflecting mirror is effective
Incident area is only slightly larger than the hot spot of laser beam, then by the program-controlled setting of automatically controlled displacement platform, so that at the Laser output moment,
Reflecting mirror is remain stationary, and fast moves the position for leaving outgoing beam after light again out, avoids blocking reflected light below.
The move mode of this automatically controlled displacement platform, can meet above-mentioned pulse close that the power superposition of beam, beam quality be constant and optical path on adopt
With total reflection requirement on devices, the conjunction beam request of low recurrent frequency pulse laser is realized.
Fig. 5 gives invention pulse and closes beam laser system theory of constitution schematic diagram, according to the pulse laser 9 of timing control
Output beam is directly transmitted on reflecting mirror 2, closes beam finally to export after a branch of pulse laser beam.Fig. 6 then gives a kind of knot
Beam Optical Maser System is closed in the compact pulse of structure, and the output beam of laser 9 reenters after mirror 10 of turning back to be incident upon on reflecting mirror 2,
Conjunction beam is carried out again.Whole system is compact-sized, convenient for being laid out implementation, while whole combined beam lights perpendicular to combined beam light Shu Fangxiang
Device be all made of it is reflective, especially suitable for it is high-power, for a long time go out light situation, close beam implement in will not be to incident laser
Parameter generation expands, the added influences such as shrink beam, it is ensured that the laser beam quality after closing beam.
The present embodiment also provides a kind of method for pulse laser beam combining, the specific steps are as follows:
1) at least two lasers export on edge after the reflection of respective reflecting mirror according to the pulse laser of setting timing transmitting
Optical path outgoing；
2) each reflecting mirror is movable into and out output light path according to the timing that pulse laser matches, and in output light path
On laser emitting direction, the reflecting mirror in front position will not stop the light beam of rear position reflecting mirror.
Pulse laser in the step 1) first passes through after catadioptric mirror reflects again through the reflection of reflecting mirror.
Claims (10)
1. a kind of bundling device for pulse laser, it is characterised in that: the reflection being obliquely installed including more along output light path (4)
Mirror (2)；It is reflected according to the multi beam pulse laser of setting timing transmitting through corresponding reflecting mirror (2), and along defeated after beam is closed in space
Optical path (4) is emitted out；The reflecting mirror (2) is arranged on shift unit (1), shift unit (1) generation movement, so that reflection
Mirror (2) is movable into and out output light path (4) according to the timing that pulse laser matches, and is gone out in the laser of output light path (4)
It penetrates on direction, the reflecting mirror (2) in front position will not stop the light beam of rear position reflecting mirror (2).
2. the bundling device according to claim 1 for pulse laser, it is characterised in that: the shift unit is several
Only according to the automatically controlled displacement platform of timing control.
3. the bundling device according to claim 2 for pulse laser, it is characterised in that: the automatically controlled displacement platform is along vertical
It is directly mobile in the direction of output light path (4).
4. the bundling device according to claim 1 or 2 or 3 for pulse laser, it is characterised in that: the automatically controlled displacement platform
Using lead screw, cylinder or Driven by Hydraulic Cylinder.
5. the bundling device according to claim 4 for pulse laser, it is characterised in that: the reflecting mirror (2) and output
The angle of optical path (4) is 30-60 degree.
6. the bundling device according to claim 5 for pulse laser, it is characterised in that: the reflecting mirror (2) and output
The angle of optical path (4) is 45 degree.
7. it is a kind of using claim 1-6 it is one of any described in the pulse conjunction Shu Jiguang that obtains of the bundling device for pulse laser
System, it is characterised in that: including n pulse laser (9) and n reflecting mirror (2), pulse laser (9) according to setting when
Sequence shoot laser is incident to reflecting mirror (2) and forms conjunction beam laser emitting, and wherein n is the positive integer greater than 1.
8. beam laser system is closed in pulse according to claim 7, it is characterised in that: further include that n only turns back mirror (10)；Outgoing
Laser is incident to reflecting mirror (2) after mirror of turning back (10) is turned back.
9. a kind of method for pulse laser beam combining, which comprises the following steps:
1) pulse laser that at least two lasers (9) emit according to setting timing is after respective reflecting mirror (2) reflection along defeated
Optical path (4) is emitted out；
2) each reflecting mirror (2) is movable into and out output light path (4) according to the timing that pulse laser matches, and in output light path
(4) on laser emitting direction, the reflecting mirror (2) in front position will not stop the light beam of rear position reflecting mirror (2).
10. a kind of method for pulse laser beam combining according to claim 9, it is characterised in that:
Pulse laser in the step 1) first passes through the reflection after catadioptric mirror reflects again through reflecting mirror (2).
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| CN201811084011.7A CN109143572B (en) | 2018-09-17 | 2018-09-17 | Beam combiner for pulse laser, pulse beam combining laser system and method |
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| CN201811084011.7A CN109143572B (en) | 2018-09-17 | 2018-09-17 | Beam combiner for pulse laser, pulse beam combining laser system and method |
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| CN109633827A (en) * | 2019-02-21 | 2019-04-16 | 北京热刺激光技术有限责任公司 | High-capacity optical fiber laser timesharing output light path |
| CN114353961A (en) * | 2021-12-01 | 2022-04-15 | 北京仿真中心 | Infrared broadband large dynamic complex imaging target and interference simulation device |
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| CN109143572B (en) | 2021-05-25 |
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