CN103984183A - Laser coherent combination device adopting single-row liquid crystal optics phased arrays - Google Patents
Laser coherent combination device adopting single-row liquid crystal optics phased arrays Download PDFInfo
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- CN103984183A CN103984183A CN201410218642.9A CN201410218642A CN103984183A CN 103984183 A CN103984183 A CN 103984183A CN 201410218642 A CN201410218642 A CN 201410218642A CN 103984183 A CN103984183 A CN 103984183A
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Abstract
The invention discloses a laser coherent combination device adopting single-row liquid crystal optics phased arrays, belongs to the field of liquid crystal optics and particularly relates to the technical field of the laser coherent combination through the liquid crystal phased arrays. The plurality of LCOPAs (Liquid Crystal Optics Phased Array) are arranged into a row, every LCOPA is externally connected with a liquid crystal driving circuit and a controller, coherent laser shoots to the back side of every LCOPA, the controller controls the liquid crystal driving circuit to input appropriate voltage to every LCOPA to control the coherent laser to deflect with correct angles after the laser passing the LCOPA, and a beam of laser with strong power is combined due to interference of a plurality of deflected beams of laser. The laser coherent combination device adopting the single-row liquid crystal optics phased arrays has the advantages of being low in cost, high in laser combination power, high in accuracy and variable in direction.
Description
Technical field
The invention belongs to liquid crystal optics field, particularly relate to laser and realize relevant synthetic technical field by liquid crystal optical phased array.
Background technology
Liquid crystal optical phased array (LCOPA) is the accurate deflection device of a kind of laser, and the some electrodes that are arranged in parallel by liquid crystal cell and on liquid crystal cell surface form, a phase-shifting unit of liquid crystal region composition of each root electrode and impact thereof.When laser incident, each phase-shifting unit is realized phase delay to the part laser that is radiated at phase-shifting unit surface, when the phase-delay difference realized when adjacent phase-shifting unit is constant, the shoot laser of phase-shifting unit interferes in far field, in the direction that departs from incident direction certain angle, obtain very big light intensity, thereby change the direction of propagation of laser, realized the accurate deflection of laser.
Laser coherent combining refers to make the phase-locked output of multiple laser by relevant control, obtains the technology of synthetic laser.Existing relevant synthetic method is to realize by fiber laser array, fiber laser array outgoing multiple coherent laser, and phase-locking device keeps the phase place of multiple laser consistent, and multiple coherent laser interferes in far field, thereby realizes the relevant synthetic of laser.Owing to there is no beam direction control unit, existing laser synthetic technology can only realize in fixed position, far field the relevant synthetic of laser, and the beam position of synthetic laser is identical with the shoot laser direction of fiber laser.And in applications such as laser radars, require laser not only to have high-power, also to there is the beam position ability of arbitrary orientation.Because existing relevant synthetic technology can not meet the application requirements of laser radar, therefore in the urgent need to a kind of relevant synthetic technology that can obtain at far field arbitrary orientation high power laser.
Summary of the invention
The object of the invention is to improve design with a kind of Laser coherent combining device that adopts single-row liquid crystal optical phased array for the weak point of background technology, thereby reach the object that cost is low, synthetic laser power is high, precision is high, beam position is variable.
Technical scheme of the present invention forms a line some LCOPA, each LCOPA is external liquid crystal display drive circuit and controller respectively, coherent laser is respectively from each LCOPA back side vertical incidence, controller control liquid crystal display drive circuit inputs suitable voltage to each LCOPA, control coherent laser by the identical angle of LCOPA post deflection, interfere synthetic one high-power laser in far field finally by the multiply laser of crossing equal angular deflection, change laser and just can obtain by the angle of LCOPA post deflection the synthetic laser that different beams points to, thereby realize goal of the invention.Thereby a kind of Laser coherent combining device that adopts single-row liquid crystal optical phased array of the present invention comprises: coherent laser generating unit, laser synthesis unit, it is characterized in that laser synthesis unit is formed a line and formed by multiple LCOPA, each LCOPA connects respectively liquid crystal display drive circuit and controller.
Wherein laser synthesis unit is formed a line and is formed by N LCOPA, and N is greater than 1 integer, and each LCOPA centre distance span is between 1cm～10cm;
Each LCOPA forms by liquid crystal cell and at the some strip electrodes that are set up in parallel in liquid crystal cell surface;
Each LCOPA is that length and width is the rectangular parallelepiped that 1cm, thickness are 5mm, comprises 1920 independent strip electrodes, electrode width 5um, and adjacent electrode is arranged side by side.
The present invention is by forming a line some LCOPA, each LCOPA is external liquid crystal display drive circuit and controller respectively, coherent laser is respectively from each LCOPA back side vertical incidence, controller control liquid crystal display drive circuit inputs suitable voltage to each LCOPA, control coherent laser by the identical angle of LCOPA post deflection, interfere synthetic one high-power laser finally by the multiply laser of overshoot, thereby there is the effect that cost is low, synthetic laser power is high, precision is high, beam position is variable.
Brief description of the drawings
Fig. 1 is device schematic diagram of the present invention;
Fig. 2 is LCOPA liquid crystal characteristic curve synoptic diagram of the present invention;
Fig. 3 is LCOPA array synthetic laser light intensity of the present invention and 1 LCOPA diffraction laser intensity comparison diagram;
Fig. 4 be array of the present invention far field center O ' the synthetic light intensity comparison diagram of position and 3 ° of positions.
Embodiment
Below in conjunction with a model experiment example the specific embodiment of the present invention.Treatment in accordance with the present invention step,
Laser generating unit adopts fiber laser array outgoing multiple coherent laser, laser synthesis unit is formed a line and is formed by 4 LCOPA, the centre distance of each LCOPA is 11mm, each LCOPA is the rectangular parallelepiped that length of side 1cm, thickness are 5mm, comprise 1920 and be set up in parallel in the independent strip electrode in liquid crystal cell surface, electrode width is 5um.
First measure the liquid crystal characteristic curve of single LCOPA, 0～5V is divided into 200 voltages, load successively V=0,0.025,0.05 ..., 5 to LCOPA, the phase delay of measuring LCOPA is
draw out brilliant family curve as shown in Figure 2.
Setting laser deflection angle is 3 degree, according to formula
Calculate the phase delay that laser sees through each phase-shifting unit, wherein d represents the electrode width in LCOPA, and λ represents to swash light wavelength,
the phase modulation that represents adjacent electrode postpones.Obtaining adjacent electrode phase modulation postpones
therefore the phase delay of all electrodes of LCOPA is
Then obtain needing the correct voltage of loading according to liquid crystal characteristic curve, input correct voltage by controller control liquid crystal display drive circuit to LCOPA, realize laser deflection, relevant synthetic.
Claims (4)
1. one kind adopts the Laser coherent combining device of single-row liquid crystal optical phased array, this device comprises: coherent laser generating unit, laser synthesis unit, it is characterized in that laser synthesis unit is formed a line and formed by multiple LCOPA, each LCOPA connects respectively liquid crystal display drive circuit and controller.
2. a kind of Laser coherent combining device that adopts single-row liquid crystal optical phased array as claimed in claim 1, it is characterized in that laser synthesis unit is formed a line and formed by N LCOPA, N is greater than 1 integer, and each LCOPA centre distance is that span is between 1cm～10cm.
3. a kind of Laser coherent combining device that adopts single-row liquid crystal optical phased array as claimed in claim 1, is characterized in that each LCOPA forms by liquid crystal cell and at the some strip electrodes that are set up in parallel in liquid crystal cell surface.
4. a kind of Laser coherent combining device that adopts single-row liquid crystal optical phased array as claimed in claim 1, it is characterized in that each LCOPA is that length and width is the rectangular parallelepiped that 1cm, thickness are 5mm, comprise 1920 independent strip electrodes, electrode width is 5um, and each electrode is arranged side by side.
Priority Applications (1)
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| CN201410218642.9A CN103984183A (en) | 2014-05-22 | 2014-05-22 | Laser coherent combination device adopting single-row liquid crystal optics phased arrays |
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| CN201410218642.9A CN103984183A (en) | 2014-05-22 | 2014-05-22 | Laser coherent combination device adopting single-row liquid crystal optics phased arrays |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280974A (en) * | 2014-09-02 | 2015-01-14 | 电子科技大学 | Focusing type coherent combination method based on liquid crystalline phased arrays |
| CN104865770A (en) * | 2015-05-11 | 2015-08-26 | 电子科技大学 | Method for achieving one-dimensional deflection and beam divergence angle scaling of laser beam based on optical phased array |
| CN104865768A (en) * | 2015-05-11 | 2015-08-26 | 电子科技大学 | Laser coherent combination method based on two-dimensional liquid crystal optical phased array |
| CN108761956A (en) * | 2018-06-15 | 2018-11-06 | 电子科技大学 | A kind of liquid crystal optical phased array bore expansion system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008045653A2 (en) * | 2006-10-05 | 2008-04-17 | Northrop Grumman Corporation | Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler |
| CN101459315A (en) * | 2009-01-04 | 2009-06-17 | 中国人民解放军国防科学技术大学 | Pulse laser based on wavelength-division multiplex coherent synthesizing phase control |
| US7970040B1 (en) * | 2007-04-04 | 2011-06-28 | The United States Of America As Represented By The Secretary Of The Navy | Apparatus for incoherent combining of high power lasers for long-range directed-energy applications |
-
2014
- 2014-05-22 CN CN201410218642.9A patent/CN103984183A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008045653A2 (en) * | 2006-10-05 | 2008-04-17 | Northrop Grumman Corporation | Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler |
| US7970040B1 (en) * | 2007-04-04 | 2011-06-28 | The United States Of America As Represented By The Secretary Of The Navy | Apparatus for incoherent combining of high power lasers for long-range directed-energy applications |
| CN101459315A (en) * | 2009-01-04 | 2009-06-17 | 中国人民解放军国防科学技术大学 | Pulse laser based on wavelength-division multiplex coherent synthesizing phase control |
Non-Patent Citations (3)
| Title |
|---|
| 刘泽金 ET AL: "激光相干合成的历史、现状与发展趋势", 《中国激光》 * |
| 张健 ET AL: "液晶光学相控阵可编程光束偏转研究", 《光子学报》 * |
| 黄智蒙 ET AL: "基于液晶光调制器的激光相干合成主动相位控制", 《中国激光》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280974A (en) * | 2014-09-02 | 2015-01-14 | 电子科技大学 | Focusing type coherent combination method based on liquid crystalline phased arrays |
| CN104865770A (en) * | 2015-05-11 | 2015-08-26 | 电子科技大学 | Method for achieving one-dimensional deflection and beam divergence angle scaling of laser beam based on optical phased array |
| CN104865768A (en) * | 2015-05-11 | 2015-08-26 | 电子科技大学 | Laser coherent combination method based on two-dimensional liquid crystal optical phased array |
| CN104865768B (en) * | 2015-05-11 | 2018-01-12 | 电子科技大学 | Laser coherent combining method based on two-dimentional liquid crystal optical phased array array |
| CN108761956A (en) * | 2018-06-15 | 2018-11-06 | 电子科技大学 | A kind of liquid crystal optical phased array bore expansion system and method |
| CN108761956B (en) * | 2018-06-15 | 2020-04-17 | 电子科技大学 | Liquid crystal optical phased array caliber expansion system and method |
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Application publication date: 20140813 |