CN103513428B - A kind of method and device realizing coherent laser beam combination - Google Patents
A kind of method and device realizing coherent laser beam combination Download PDFInfo
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- CN103513428B CN103513428B CN201310467671.4A CN201310467671A CN103513428B CN 103513428 B CN103513428 B CN 103513428B CN 201310467671 A CN201310467671 A CN 201310467671A CN 103513428 B CN103513428 B CN 103513428B
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Abstract
The invention discloses a kind of method realizing coherent laser beam combination, belong to laser technology field.Method of the present invention is: the flashlight sent by laser instrument is divided into multi-path laser light beam, and will wherein draw as current reference light by a road laser beam, and all the other each road laser beams are coupled with corresponding light beam respectively; Carry out amplification process to coupling Hou Ge road light beam, after Zai Duige road light beam carries out optical modulation process, collimation exports, and obtains coherently combined; This optical modulation is treated to: the phase place blue light in the light beam of each road being modulated to laser; The power of the current light beam be coupled with laser beam, the phase differential between the light beam collimating the respective optical path of output after depending on last reference light and optical modulation process.Meanwhile, the invention allows for the device of corresponding said method.The present invention realizes easy, to the hot ability to bear of device without particular demands, just can realize accurate phase-modulation, obtains high-power coherent laser and exports, can be widely used in laser technology.
Description
Technical field
The invention belongs to laser technology field, particularly a kind of method and device realizing coherently combined before laser wave.
Background technology
In the application that laser power requirements is higher, owing to being subject to the impact of the mechanism such as the thermal effect of laser instrument own or nonlinear effect, the output power of laser instrument can be limited, reach required higher laser output power, swashing combiner technology is wherein a kind of technical solution, to meet the requirement that system exports high power laser light.
In the technical scheme of sharp combiner, two kinds of conventional conjunction bundle modes are: incoherent conjunction bundle and coherently combined, wherein incoherent conjunctions bundle just simple each road laser energy superpose, therefore optimum chemical combination bundle can not be realized; And coherently combined Shi Ge road laser interferes, be the superposition of input laser electric field, in contrast, its performance is more excellent.
Coherently combined has the influence factor that two important: accurate phase control and fill factor, curve factor.At present, in the implementation of coherently combined, in order to ensure accurate phase control, usually high to the demand of the hot ability to bear of corresponding device, the mode of grating external-cavity combination is such as adopted to realize coherently combined, concrete structure can with reference to figure 1, in this scenario, body grating is placed in Compound Cavity, all laser instruments (example provided in figure is pumping source fuel laser instrument) share 1 exocoel, realize exporting by 1 translucent coupling mirror, lens focus makes different laser beams incide on special body grating with different angles, and only in one direction coherence stack jointly export, feedback is provided because outgoing mirror has certain reflectivity, make the energy of different light beam can enter in other optical fiber, the light generation of each like this fiber laser checks and balance, reach phase-locked object.But in this programme, due to special body grating in one direction coherence stack jointly export, its perform region is smaller, causes body grating to require higher, so can not reach the coherently combined of more multiple beam to the holding capacity of heat.Therefore be necessary to propose a kind of new coherently combined processing scheme, reduce the demand of the hot ability to bear to corresponding device, to improve the efficiency of existing coherently combined scheme.
Summary of the invention
The object of the invention is to: provide a kind of efficient, to the low method realizing coherent laser beam combination of the hot ability to bear demand of equipment and device.
The method realizing coherent laser beam combination of the present invention, comprises the following steps:
The flashlight sent by laser instrument is divided into multi-path laser light beam, and will wherein draw as current reference light by a road laser beam, and all the other each road laser beams are coupled with corresponding light beam respectively;
Carry out amplification process to coupling Hou Ge road light beam, after Zai Duige road light beam carries out optical modulation process, collimation exports, and obtains coherently combined;
Described optical modulation is treated to: the phase place blue light in the light beam of each road being modulated to laser; The power of the described current light beam be coupled with laser beam, the phase differential between the light beam collimating the respective optical path of output after depending on last reference light and optical modulation process.
The present invention is based on the phase differential between the laser beam of current acquisition and coupled light beam (coupled light beam of laser beam and light beam), with the characteristic relation of blue power, the regulated quantity of light beam power when obtaining next coupling processing, power adjustments amount based on current acquisition controls the power of the light beam of subsequent coupling process, so realize phase-locked output, before obtaining laser wave, coherently combined exports.It realizes easy, and the light beam realizing coherently combined is many, and the efficiency that the coherent laser obtained exports is high, and can guarantee phase-modulation degree of accuracy, again can not be high to the hot ability to bear demand of device.
Based on method of the present invention, the invention also discloses a kind of device realizing coherent laser beam combination, comprising:
The beam splitter of external laser instrument, described beam splitter is connected with detector, for by a road Laser beam propagation to detector;
The multiple coupling mechanisms be connected with beam splitter, blu-ray drive respectively, for the light beam that coupling beam divider and blu-ray drive export;
The amplifier be connected with described coupling mechanism, described amplifier is connected one to one with coupling mechanism;
The photomodulator be connected with each amplifier, for being modulated to the phase place of laser by the blue light in the output beam of each amplifier;
And carry out collimating the collimating mirror exported to the output beam of photomodulator, the output beam of collimation mirror carries out the semi-transparent semi-reflecting lens of transmittance and reflectance, and the reflected light that described semi-transparent semi-reflecting lens produces enters detector;
Described detector is based on the laser beam of beamsplitter, phase differential between each road light beam of exploring laser light light beam and reflected light, and convert described phase differential to blu-ray drive that electric signal exports respective optical path to, for controlling the power of the light beam that it exports.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows: the phase control of coherently combined is accurate, and coherently combined treatment effeciency is high, and it is convenient to realize.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is the existing device schematic diagram realizing coherently combined;
Fig. 2 is the fundamental diagram of the specific embodiment of the invention;
1-n---represent the laser beam of different light paths, 2-n---represent the light beam of different light paths, wherein n is natural number; 3---collimating mirror; 4---semi-permeable and semi-reflecting mirror; 5---detector.
Embodiment
All features disclosed in this instructions, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this instructions (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
See Fig. 2, the present invention realizes the device of coherent laser beam combination, comprises beam splitter, coupling mechanism, amplifier, blu-ray drive, photomodulator, collimating mirror 3, semi-transparent semi-reflecting lens 4, detector 5,
Wherein, beam splitter is by the laser instrument (as seed source laser) of the external light that transmits of Transmission Fibers, and this flashlight is the laser that will close bundle; And beam splitter is also connected with detector 5, for by a road Laser beam propagation in detector 5, the laser beam of input detector is as with reference to light;
Blu-ray drive is the blue laser that can control blue power, for exporting the light beam of different luminous power;
Coupling mechanism, is specially monomode coupler, and based on Transmission Fibers, coupling mechanism is connected with beam splitter, blu-ray drive respectively, and for the light beam that coupling beam divider and blu-ray drive export, the number of coupling mechanism depends on the light beam needed involved by coherently combined;
Amplifier, in present embodiment, selects MOPA power amplifier, and it is the master oscillator power amplifier fiber array carried out for flashlight.Amplifier is connected with each coupling mechanism one by one by Transmission Fibers;
By the photomodulator that Transmission Fibers is connected with each amplifier, in present embodiment, select blue optical-address liquid crystal spatial light modulator, it is by the voltage swing at the intensity control liquid crystal two ends of blue light, realize light addressing, thus reach the modulation of the flashlight phase place to input, namely respectively the blue light in the light beam of the output of amplifier is modulated to the phase place of laser;
And carry out collimating the collimating mirror 3 exported to the output beam of photomodulator, its focal length is selected according to the geometry arrangement of optical fiber, and LCD space light modulator is in the focus of collimating mirror;
The output beam of collimation mirror 3 carries out the semi-transparent semi-reflecting lens 4 of transmittance and reflectance, and the reflected light that semi-transparent semi-reflecting lens 4 produces enters in detector 5.Because semi-transparent semi-reflecting lens 4 pairs of flashlight transmissivities are very high, reflectivity is lower, thus makes it small part reflected light and enter in detector 5, with reference light generation difference interference, utilizes process of heterodyning, obtains the phase pushing figure of system, for close-loop feedback controls to provide phase information;
Detector 5 is connected by Transmission Fibers with blu-ray drive, the each phase pushing figure it obtained exports corresponding blu-ray drive to, for controlling the power that it exports light beam, namely when phase pushing figure be based on 2-n road light beam (n be greater than 0 natural number) be coupled with laser beam after, when the light beam that photomodulator, collimating mirror 3, semi-transparent semi-reflecting lens 4 reflect, then this side-play amount is transferred to the blu-ray drive of output 2-n road light beam.
Workflow of the present invention is: seed source laser launches flashlight, and flashlight is divided into multi-path laser light beam through beam splitter, will wherein go out as reference light and transfer to detector 5, all the other light path called afters light path 1-1,1-2 by a pass ..., 2-n; Blu-ray drive controls light beam power, export different luminous power (during system initialization, light beam power can arrange initial value arbitrarily, when subsequent treatment, the power of light beam, the phase differential between the light beam collimating the respective optical path of output after depending on last reference light and optical modulation process.) light beam be 2-1,2-2 ..., 2-n; Each road laser beam, light beam transfer to coupling mechanism respectively, and laser beam, the light beam of two different wave lengths are coupled to a road light beam by coupling mechanism, are transferred to the amplification of amplifier realization to light beam through Transmission Fibers; Light beam after amplification arrives photomodulator through Transmission Fibers, and the phase information of the light beam of being come by co-axial propagation by photomodulator is modulated to the phase information of laser beam.Watt level due to light beam is that the phase information obtained according to close-loop feedback carries out calculatings gained, therefore, it is possible to make flashlight output in each road have identical phase place, namely has identical wavefront, completes coherently combined before laser wave.The output beam of photomodulator carries out collimation through collimating mirror 3 and exports, its output beam reflects sub-fraction light to detector 5 through semi-transparent semi-reflecting lens 4, reflected light and the reference light of drawing are interfered, its phase differential (utilizing process of heterodyning to obtain the phase pushing figure of each road light beam and reference light) is detected through detector 5, through the characteristic relation of phase differential and blue power, obtain the regulated quantity of blue power, this regulated quantity converts electric signal to, control blu-ray drive, realize the control of blue light luminous power, so reach phase-locked output, before obtaining laser wave, coherently combined exports.
Embodiment
In this exemplifying embodiment, seed source laser output signal light 1064nm infrared light, multi-path laser light beam is divided into through beam splitter, as the reading light of LCD space light modulator, blu-ray drive controls output multi-channel 450nm blue light, and as control light and the writing light of LCD space light modulator, corresponding light beam is coupled in Transmission Fibers through coupling mechanism and transmits, each road light beam realizes amplifying by MOPA power amplifier and exports, then is transferred to LCD space light modulator surface through Transmission Fibers.LCD space light modulator, to output light phase modulation, is modulated into the output of identical wavefront, and then realizes the coherently combined of wavefront.
The present embodiment is by utilizing technology relative maturity, the LCD space light modulator of relative low price, realizes controlling the relative precise phase of laser, makes the modulated signals laser array exported through LCD space light modulator, there is identical wavefront, thus coherently combined before completing laser wave.Compared with existing scheme, it realizes easy, with low cost, low to the hot ability to bear demand of device, and the power that coherently combined exports is high.
Claims (6)
1. realize a method for coherent laser beam combination, it is characterized in that, comprise the following steps:
The flashlight sent by laser instrument is divided into multi-path laser light beam, and will wherein draw as current reference light by a road laser beam, and all the other each road laser beams are coupled with corresponding light beam respectively;
Carry out amplification process to coupling Hou Ge road light beam, after Zai Duige road light beam carries out optical modulation process, collimation exports, and obtains coherently combined;
Described optical modulation is treated to: the phase place blue light in the light beam of each road being modulated to laser;
The power of the described current light beam be coupled with laser beam, the phase differential between the light beam collimating the respective optical path of output after depending on last reference light and optical modulation process.
2. the method for claim 1, it is characterized in that, the phase differential obtained between reference light and the light beam of respective optical path is: will collimate the light path of output after optical modulation process through semi-transparent semi-reflecting lens, the reflected light obtained and reference light are carried out difference interference, obtains corresponding phase differential.
3. method as claimed in claim 1 or 2, is characterized in that, when performing laser beam light beam and carrying out coupling operation, the power of each light beam of initialization is preset value.
4. realize a device for coherent laser beam combination, it is characterized in that, comprising:
The beam splitter of external laser instrument, described beam splitter is connected with detector, for by a road Laser beam propagation to detector;
The multiple coupling mechanisms be connected with beam splitter, blu-ray drive respectively, for the light beam that coupling beam divider and blu-ray drive export;
The amplifier be connected with described coupling mechanism, described amplifier is connected one to one with coupling mechanism;
The photomodulator be connected with each amplifier, for being modulated to the phase place of laser by the blue light in the output beam of each amplifier;
And carry out collimating the collimating mirror exported to the output beam of photomodulator, the output beam of collimation mirror carries out the semi-transparent semi-reflecting lens projecting and reflect, and the reflected light that described semi-transparent semi-reflecting lens produces enters detector;
Described detector is based on the laser beam of beamsplitter, and the phase differential between each road light beam of exploring laser light light beam and reflected light, and described phase differential is exported to the blu-ray drive of respective optical path, for controlling the power of the light beam that it exports.
5. device as claimed in claim 4, it is characterized in that, described photomodulator is blue optical-address liquid crystal spatial light modulator.
6. the device as described in claim 4 or 5, is characterized in that, described amplifier is Master Oscillator Power-Amplifier.
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| DE102016100721B3 (en) * | 2016-01-18 | 2017-03-23 | Trumpf Scientific Lasers Gmbh + Co. Kg | Relative phase measurement for the coherent combining of laser beams |
| CN107561649B (en) * | 2017-10-10 | 2020-08-21 | 吉林珩辉光电科技有限公司 | Light wavelength division multiplexing system based on liquid crystal spatial light modulator |
| DE102020201161A1 (en) * | 2020-01-31 | 2021-08-05 | Trumpf Laser Gmbh | Device, laser system and method for combining coherent laser beams |
| CN112164973B (en) * | 2020-10-12 | 2021-08-27 | 中国人民解放军国防科技大学 | Phase control system and method for realizing orbital angular momentum light beam mode switching |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7079320B2 (en) * | 2003-07-15 | 2006-07-18 | Kewitsch Anthony S | Bandwidth properties of LC-SLMs for telecommunication applications with particular third compensator |
| CN103033944A (en) * | 2012-12-04 | 2013-04-10 | 广东汉唐量子光电科技有限公司 | Polarization beam-combination device for pulsed laser |
-
2013
- 2013-10-09 CN CN201310467671.4A patent/CN103513428B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7079320B2 (en) * | 2003-07-15 | 2006-07-18 | Kewitsch Anthony S | Bandwidth properties of LC-SLMs for telecommunication applications with particular third compensator |
| CN103033944A (en) * | 2012-12-04 | 2013-04-10 | 广东汉唐量子光电科技有限公司 | Polarization beam-combination device for pulsed laser |
Non-Patent Citations (3)
| Title |
|---|
| 主动相位控制光纤激光相干合成的研究;刘泽金等;《中国激光》;20090331;第36卷(第3期);第518页-519页、图1 * |
| 光寻址液晶空间光调制器用于激光光束整形的可控系统和设计算法;陈晓西等;《红外与激光工程》;20100228;第39卷(第1期);第48页-49页、图1 * |
| 基于液晶光调制器的激光相干合成主动相位控制;黄智蒙等;《中国激光》;20100731;第37卷(第7期);第1713页-第1716页、图1 * |
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