CN105226495A - A kind of laser beam merging apparatus based on graded index electrooptic crystal and method thereof - Google Patents
A kind of laser beam merging apparatus based on graded index electrooptic crystal and method thereof Download PDFInfo
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- CN105226495A CN105226495A CN201510753656.5A CN201510753656A CN105226495A CN 105226495 A CN105226495 A CN 105226495A CN 201510753656 A CN201510753656 A CN 201510753656A CN 105226495 A CN105226495 A CN 105226495A
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Abstract
The invention discloses a kind of laser beam merging apparatus based on graded index electrooptic crystal and method thereof, comprise the electrooptic crystal with Kerr effect and space charge effect; Drive circuit; At least 2 lasers, the delivery outlet of described laser is relative with the plane of incidence of electrooptic crystal, and the Exit positions on exit facet is same point, and the pulse laser transmission direction of outgoing is identical, and the described plane of incidence is all vertical with battery lead plate with described exit facet; Synchronous motor, described drive circuit is all connected with synchronous motor with whole lasers; The present invention utilizes Kerr effect and the space charge effect of electrooptic crystal, improves repetition rate and the average power of pulse laser output under the prerequisite not reducing pulse energy.
Description
Technical field
The present invention relates to superpower laser field, be specifically related to a kind of laser beam merging apparatus based on graded index electrooptic crystal and method thereof.
Background technology
Along with development and the maturation of laser technology, high power laser light has to be applied more and more widely, has had a deep effect on the development of multiple industry.Divide high power laser light by working method and be mainly divided into high-peak power laser (i.e. high energy pulse laser) and high-average power laser.
For high energy pulse laser, require that laser has certain repetition rate in multiple application.But directly improve the repetition rate of high energy pulse laser operation, serious thermal effect will be produced, thus affect the performance of laser, even cause laser to export pulse energy and decline or can not work.For high-average power laser, application demand constantly proposes requirements at the higher level to laser output power, and single laser power ascension is limited, is difficult to realize higher average output power.
Therefore, no matter be for high energy pulse laser or for high-average power laser, the repetition rate improving pulse laser is all need the problem of solution badly.
Summary of the invention
For above-mentioned problems of the prior art, the present inventor thinks that close bundle by pulse laser solves this problem, for high energy pulse laser, sequential closes the repetition rate that bundle can improve laser pulse output, for high-average power laser, sequential closes the average power that bundle can improve Output of laser.The invention provides a kind of laser beam merging apparatus based on graded index electrooptic crystal and method thereof, the present invention utilizes Kerr effect and the space charge effect of electrooptic crystal, by drive circuit, voltage is applied to electrooptic crystal, the refractive index in electrooptic crystal is made to be what gradually change, electrooptic crystal, drive circuit, synchronous motor and laser are cooperatively interacted, multipath pulse laser is closed Shu Weiyi road pulse laser, under the prerequisite not reducing pulse energy, improve repetition rate and the average power of pulse laser output.
For achieving the above object, the invention provides following technical scheme:
Based on a laser beam merging apparatus for graded index electrooptic crystal, comprising:
There is the electrooptic crystal of Kerr effect and space charge effect;
Drive circuit, match in the bottom surface that 2 battery lead plates of described drive circuit are parallel with 2 of electrooptic crystal respectively;
At least 2 lasers, the delivery outlet of described laser is relative with the plane of incidence of electrooptic crystal, the incoming position of pulse laser on the plane of incidence that laser exports is arranged as straight line, Exit positions on exit facet is same point, the pulse laser transmission direction of outgoing is identical, and the described plane of incidence is all vertical with battery lead plate with described exit facet;
Synchronous motor, described drive circuit is connected with synchronous motor respectively with whole lasers.
Further, described electrooptic crystal is potassium tantalate niobate crystal.
Further, the pulse laser of wherein 1 laser output is perpendicular to the plane of incidence.
Further, adjacent laser front-back staggered arrangement.
Utilize described above based on a conjunction Shu Fangfa for the laser beam merging apparatus of graded index electrooptic crystal, comprise the following steps:
(1) delivery outlet of laser is relative with the plane of incidence of electrooptic crystal, and the incoming position of pulse laser on the plane of incidence that laser exports is arranged as straight line, and laser is controlled by synchronous motor, repeats to export pulse laser in the different moment;
(2) when the pulse laser exported by various lasers is not when inciding the plane of incidence of electrooptic crystal in the same time, synchronous motor controls drive circuit and applies different voltage to electrooptic crystal;
(3) described pulse laser is by the exit facet outgoing of electrooptic crystal, and Exit positions is same point, and the transmission direction of outgoing afterpulse laser is identical, obtains closing bundle of pulsed laser.
Further, described electrooptic crystal is potassium tantalate niobate crystal.
Further, the pulse laser of wherein 1 laser output is perpendicular to the plane of incidence, and when this pulse laser incides electrooptic crystal, drive circuit is zero to the voltage that electrooptic crystal applies.
Further, adjacent laser front-back staggered arrangement.
Beneficial effect of the present invention is as follows:
1, electrooptic crystal, drive circuit are combined with synchronous motor, the feature of the ingenious reverse electro optic effect, space charge effect and the pulse laser that utilize electrooptic crystal, multipath pulse laser is closed Shu Chengyi road laser, under the prerequisite not reducing pulse energy, improve repetition rate and the average power of pulse laser output;
2, by synchronous motor to the control in multipath pulse laser sequential, identical or different conjunction bundle of pulsed laser interpulse period can be obtained;
3, can be realized the conjunction bundle of multipath pulse laser by beam merging apparatus of the present invention, as needed the pulse laser of more high repetition frequency, beam merging apparatus of the present invention is carried out plural serial stage can be realized;
4, the pulse laser that laser exports for the pulse of reruning, also can be able to be single pulse, can have the characteristics such as different pulse shape, pulse duration, wavelength, spectral width, chirping characteristics, amplitude.
Accompanying drawing explanation
Fig. 1 is beam merging apparatus overall structure schematic diagram of the present invention;
Fig. 2 is conjunction Shu Qianhou pulse laser schematic diagram of the present invention.
In figure: 1-electrooptic crystal, 2-drive circuit, 21-battery lead plate, 22-battery lead plate, 31-laser, 32-laser, 33-laser, 310-pulse laser, 320-pulse laser, 330-pulse laser, 4-synchronous motor, 5-laser alignment element, 6-close bundle of pulsed laser.
Embodiment
Technical scheme of the present invention is understood better in order to make those skilled in the art; below in conjunction with accompanying drawing of the present invention; clear, complete description is carried out to technical scheme of the present invention; based on the embodiment in the application; other roughly the same embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of the application's protection.
Embodiment one:
As shown in Figure 1, a kind of laser beam merging apparatus based on graded index electrooptic crystal, comprising: electrooptic crystal 1, drive circuit 2,3 lasers, synchronous motor 4 and laser alignment elements 5.
In the present invention, electrooptic crystal 1 has Kerr effect and space charge effect, and described electrooptic crystal 1 is potassium tantalate niobate crystal.Kerr effect refers to the electric induction birefringent phenomenon be directly proportional to electric field quadratic power, and space charge is the residual charge being present in the inner regional area of semiconductor.Due to the existence of Kerr effect, when the bottom surface that electrooptic crystal 1 liang is parallel applies voltage, uniform electric field can be produced in electrooptic crystal 1 inside, and the refractive index of electrooptic crystal 1 paired pulses laser is according to executing alive difference and different, again owing to there is space charge in electrooptic crystal 1, thus balance out the extra electric field of part, electrooptic crystal 1 internal electric field is caused not to be identical throughout, but gradually change, refractive index also gradually changes, when there being pulse laser through this electrooptic crystal 1, the path of pulse laser transmission will deflect gradually, by controlling the incoming position of voltage swing and the incident laser applied, just can obtain by the pulse laser of the equidirectional outgoing of same point, namely the object of closing bundle is reached.
Match in the bottom surface that the battery lead plate 21 of described drive circuit 2 is parallel with 2 of electrooptic crystal 1 respectively with battery lead plate 22, battery lead plate 21 is identical with the shape and size of electrooptic crystal 1 bottom surface with the shape and size of battery lead plate 22, so just can form in electrooptic crystal 1 inside the electric field gradually changed, and then produce the refractive index gradually changed, instead of the refractive index of sudden change, be convenient to calculate the voltage and incoming position that need to apply;
3 lasers, laser 31 respectively, laser 32 and laser 33, the number of laser is determined as required, laser 31, laser 32 is all relative with the plane of incidence of electrooptic crystal 1 with the delivery outlet of laser 33, the pulse laser 310 that laser 31 exports, the pulse laser 320 that laser 32 exports and the incoming position of pulse laser 330 on the plane of incidence that laser 33 exports are arranged as straight line, through the effect of the graded index of electrooptic crystal 1, 3 road pulse lasers level off to same light path, and the same point outgoing on exit facet, the pulse laser transmission direction of outgoing is identical, the described plane of incidence and described exit facet are all vertical with battery lead plate 22 with battery lead plate 21, so just can obtain the refractive index of gradual change on pulse laser 320 and pulse laser 330 transmission direction, the transmission path of pulse laser 320 and pulse laser 330 is deflected gradually, and ensure that final pulse laser 320 and pulse laser 330 all transmit with pulse laser 310 same light path, the pulse laser 310 that laser 31 exports is perpendicular to the plane of incidence, this road beam orthogonal is incident and through electrooptic crystal 1, this pulse laser 310 through electrooptic crystal 1 time, drive circuit 2 does not need to apply voltage to electrooptic crystal 1, because deflection angle is larger, the voltage applied electrooptic crystal 1 is also larger, therefore, if have more multi-laser when, remaining laser can symmetry arrangement in the both sides of laser 31, adjacent laser front-back staggered arrangement (be relatively front near the position of electrooptic crystal 1), use the electrooptic crystal 1 of same size just the pulse laser of more multichannel can be closed bundle, alive numerical value is executed to reduce, improve fail safe, economize on resources.The pulse laser that laser 31, laser 32 and laser 33 export for the pulse of reruning, also can be able to be single pulse, can have the characteristics such as different pulse shape, pulse duration, wavelength, spectral width, chirping characteristics, amplitude.
Described drive circuit 2 is all connected with synchronous motor 4 with whole lasers, the moment that laser 31, laser 32 and laser 33 export pulse laser is all controlled by synchronous motor 4, the alive moment executed by drive circuit 2 and voltage swing is also controlled by synchronous motor 4, only controlled to not only simplify beam merging apparatus by a synchronous motor 4, avoid the time difference between different synchronous motor simultaneously, improve the precision that beam merging apparatus is controlled;
Laser alignment element 5 is positioned at the side of exit facet, perpendicular to the pulse laser of outgoing, for reducing the angle of divergence of closing bundle of pulsed laser 6, obtains the conjunction bundle of pulsed laser 6 of linear transmission.
Utilize described above based on a conjunction Shu Fangfa for the laser beam merging apparatus of graded index electrooptic crystal, comprise the following steps:
(1) laser 31, laser 32 are all relative with the plane of incidence of electrooptic crystal 1 with the delivery outlet of laser 33, the pulse laser 310 exported, pulse laser 320 and the incoming position of pulse laser 330 on the plane of incidence are arranged as straight line, and this straight line parallel is in direction of an electric field, laser 31, laser 32 and laser 33 control by synchronous motor 4, repeat to export pulse laser in the different moment;
(2) pulse laser 310, pulse laser 320 and pulse laser 330 pass through electrooptic crystal 1 in the different moment, when the pulse laser 310 exported by laser 31 incides the plane of incidence of electrooptic crystal 1, the voltage that synchronous motor 4 controls drive circuit 2 pairs of electrooptic crystals 1 applyings is zero, when the pulse laser 320 exported by laser 32 incides the plane of incidence of electrooptic crystal 1, synchronous motor 4 controls drive circuit 2 pairs of electrooptic crystals 1 and applies lower voltage, when the pulse laser 330 exported by laser 33 incides the plane of incidence of electrooptic crystal 1, synchronous motor 4 controls drive circuit 2 pairs of electrooptic crystals 1 and applies higher voltage, different voltage is applied to electrooptic crystal 1, make each pulse laser when through electrooptic crystal 1, have different transmission paths,
Pulse laser 310, pulse laser 320 and pulse laser 330 are the pulse laser of repetition rate, above-mentioned steps only describes the conjunction bundle process of each one of them pulse of pulse laser, for its after pulse, only need repeat above-mentioned steps can realize closing bundle, improve repetition rate and average power fast and effectively;
(3) described pulse laser 310, pulse laser 320 and pulse laser 330 be not in the same time by the exit facet outgoing of electrooptic crystal 1, and Exit positions is same point, after outgoing, the transmission direction of 3 road pulse lasers is identical, through too drastic light collimating element after outgoing, obtains closing bundle of pulsed laser 6.By the control in synchronous motor 4 pairs of multipath pulse laser sequential, identical or different conjunction bundle of pulsed laser 6 interpulse period can be obtained.
Electrooptic crystal 1, drive circuit 2 are combined with synchronous motor 4, the feature of the ingenious reverse electro optic effect, space charge effect and the pulse laser that utilize electrooptic crystal 1, multipath pulse laser is closed Shu Chengyi road pulse laser, under the prerequisite not reducing pulse energy, improve repetition rate and the average power of pulse laser output.
As shown in Figure 2, laser 31 exports the pulse laser 310 of rectangle, and laser 32 exports leg-of-mutton pulse laser 320, and laser 33 exports the pulse laser 330 of rectangle, after closing bundle, can obtain closing bundle of pulsed laser 6.If desired more multipath pulse laser closes bundle, beam merging apparatus of the present invention can be carried out plural serial stage, is about to close bundle of pulsed laser 6 again as incident pulse laser, incides on next stage electrooptic crystal.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (8)
1., based on a laser beam merging apparatus for graded index electrooptic crystal, it is characterized in that, comprising:
There is the electrooptic crystal of Kerr effect and space charge effect;
Drive circuit, match in the bottom surface that 2 battery lead plates of described drive circuit are parallel with 2 of described electrooptic crystal respectively;
At least 2 lasers, the delivery outlet of described laser is relative with the plane of incidence of described electrooptic crystal, the incoming position of pulse laser on the plane of incidence that laser exports is arranged as straight line, Exit positions on exit facet is same point, the pulse laser transmission direction of outgoing is identical, and the described plane of incidence is all vertical with battery lead plate with described exit facet;
Synchronous motor, described drive circuit is connected with described synchronous motor respectively with whole lasers.
2. the laser beam merging apparatus based on graded index electrooptic crystal according to claim 1, is characterized in that, described electrooptic crystal is potassium tantalate niobate crystal.
3. the laser beam merging apparatus based on graded index electrooptic crystal according to claim 2, is characterized in that, the pulse laser of wherein 1 described laser output is perpendicular to the plane of incidence.
4. the laser beam merging apparatus based on graded index electrooptic crystal according to claim 3, is characterized in that, adjacent described laser front-back staggered arrangement.
5. utilize as arbitrary in claim 1-4 as described in the conjunction Shu Fangfa of the laser beam merging apparatus based on graded index electrooptic crystal, it is characterized in that, comprise the following steps:
(1) delivery outlet of laser is relative with the plane of incidence of electrooptic crystal, and the incoming position of pulse laser on the plane of incidence that laser exports is arranged as straight line, and laser is controlled by synchronous motor, repeats to export pulse laser in the different moment;
(2) when the pulse laser exported by various lasers is not when inciding the plane of incidence of electrooptic crystal in the same time, synchronous motor controls drive circuit and applies different voltage to electrooptic crystal;
(3) described pulse laser is by the exit facet outgoing of electrooptic crystal, and Exit positions is same point, and the transmission direction of outgoing afterpulse laser is identical, obtains closing bundle of pulsed laser.
6. conjunction Shu Fangfa according to claim 5, is characterized in that, described electrooptic crystal is potassium tantalate niobate crystal.
7. conjunction Shu Fangfa according to claim 6, it is characterized in that, wherein the pulse laser of 1 described laser output is perpendicular to the plane of incidence, and when this pulse laser incides described electrooptic crystal, described drive circuit is zero to the voltage that described electrooptic crystal applies.
8. conjunction Shu Fangfa according to claim 6, is characterized in that, adjacent described laser front-back staggered arrangement.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105790056A (en) * | 2016-04-15 | 2016-07-20 | 中国科学院理化技术研究所 | Resonant cavity optical path adjusting device and method |
| CN113422277A (en) * | 2021-06-23 | 2021-09-21 | 中国工程物理研究院激光聚变研究中心 | Device and method for automatically calibrating output power of laser in real time |
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| JP2008158326A (en) * | 2006-12-25 | 2008-07-10 | Olympus Corp | Laser scanning microscope |
| CN201845131U (en) * | 2010-08-03 | 2011-05-25 | 福州高意通讯有限公司 | Laser projection display system for eliminating speckles |
| CN205159785U (en) * | 2015-11-06 | 2016-04-13 | 中国工程物理研究院激光聚变研究中心 | Laser beam combining device based on graded index electro -optical crystal |
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2015
- 2015-11-06 CN CN201510753656.5A patent/CN105226495A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008158326A (en) * | 2006-12-25 | 2008-07-10 | Olympus Corp | Laser scanning microscope |
| CN201845131U (en) * | 2010-08-03 | 2011-05-25 | 福州高意通讯有限公司 | Laser projection display system for eliminating speckles |
| CN205159785U (en) * | 2015-11-06 | 2016-04-13 | 中国工程物理研究院激光聚变研究中心 | Laser beam combining device based on graded index electro -optical crystal |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790056A (en) * | 2016-04-15 | 2016-07-20 | 中国科学院理化技术研究所 | Resonant cavity optical path adjusting device and method |
| CN113422277A (en) * | 2021-06-23 | 2021-09-21 | 中国工程物理研究院激光聚变研究中心 | Device and method for automatically calibrating output power of laser in real time |
| CN113422277B (en) * | 2021-06-23 | 2023-06-02 | 中国工程物理研究院激光聚变研究中心 | Device and method for automatically calibrating output power of laser in real time |
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