CN106451055A - Phase control method and control circuit used for large array element coherent combination - Google Patents
Phase control method and control circuit used for large array element coherent combination Download PDFInfo
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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
- H01S3/10053—Phase control
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Abstract
The invention provides a phase control method used for large array element coherent combination. The phase control method is characterized in that a modulation signal of a phase control algorithm is subjected to orthogonal coding and single-frequency modulation; compared with a multi-dithering algorithm, debugging signals with a plurality of frequencies are not needed, so that the algorithm is simplified and hardware is convenient to realize; compared with a single-dithering algorithm, the quantity of paths subjected to phase debugging within a certain time period is increased and the control bandwidth is improved. The invention further provides a phase control circuit used for the large array element coherent combination; the phase control circuit comprises a programmable chip 1, a digital to analog converter 3, a control signal conditioning circuit 4, an analog to digital converter 5 and an input signal conditioning circuit 6, and is characterized by further comprising a multiplexer 2. Under the condition that the number of output pins of the programmable chip 1 is limited, the maximum control path quantity of a control circuit is improved, and phase control of a hundred-path-level large array element coherent combination system can be realized.
Description
Technical field
The present invention relates to the optics coherence tomography of laser, particularly a kind of phase control method for big array element optics coherence tomography and
Control circuit.
Background technology
Laser coherent combining technology can break through the limit of single laser output, improve laser power and brightness, be
The study hotspot of current superlaser technical field.(English name is for king oiscillator power amplification based on Active phase control
Master Oscillator Power Amplifier, abbreviation MOPA) structure is a kind of Laser coherent combining system for generally adopting
System is (referring to 1688069 A of patent of invention CN).The system structure is as shown in Figure 1 (referring to document：Liu Zejin, etc. Active phase
The research of control optical-fiber laser optics coherence tomography. Chinese laser, 2009,36 (3):518-524.), system mainly includes seed laser
1/, laser beam splitter 2/, phase-modulator 3/, laser amplifier 4/, laser aligner 5/, laser bundling device 6/, spectroscope 7/, light
Electric explorer 8/With phase-control circuit 9/.
Wherein, phase-control circuit is the core devices of optics coherence tomography.Current phase-control circuit is generally using as Fig. 2
Shown structure is (referring to document：Foxtail millet Rong Tao, etc. optical-fiber laser optics coherence tomography high-speed, high precision phase controller. light laser and grain
Beamlet, 2012,24 (6):1290-1294), control circuit mainly has following part to constitute：Programmable chip 1, digital to analog converter
3rd, control signal modulate circuit 4, analog-digital converter 5 and input signal conditioning circuit 6.
For the phase noise that the part such as laser amplifier in elimination system is introduced, the phase noise to each road laser is needed
It is controlled, realizes the same phase output of laser array.The light intensity fluctuation of synthesis light beam is usually detected using photodetector,
Again phase noise information therefrom being extracted by certain algorithm, and Active phase control is carried out using phase-control circuit, from
And eliminate the impact of phase noise.Widely used phase control algorithm has random paralleling gradient descent algorithm (ginseng at present
See document：Wang little Lin, etc. the high-precision phase position control system based on random paralleling gradient descent algorithm optical-fiber laser optics coherence tomography
System. Acta Physica Sinica, 2010,59 (2):973-979), many dither algorithms are (referring to document：Horse Yan Xing, etc. the main oscillations of many ditherings
Power amplifier optics coherence tomography technology. light laser and particle beam, 2009,21 (11):1639-1644) (join with single-frequency dither algorithm
See document 5：Y Ma, waits .Coherent beam combination with single frequency dithering
technique.Opt.Lett.,2010,35(9):1308-1310) etc..
As shown in Figure 2 (by taking 3 tunnels as an example), phase-control circuit is existed the principle of many dither algorithms by phase-modulator first
On each road laser load a high-frequency carrier signal, the signal when with beam Propagation can by the phase fluctuation amplitude modulation of light beam,
Finally embodied in the way of the shake of far-field spot striped.This optical signal is converted to by signal of telecommunication biography using photodetector
Phase-control circuit is defeated by, phase-control circuit calculates the phase contrast of light interfascicular again based on demodulation principle, and produces benefit accordingly
The phase place that signal loading corrects each road light beam to corresponding phase-modulator is repaid, the same phase for finally realizing laser array is defeated
Go out.As shown in Figure 3 (by taking 3 tunnels as an example), single-frequency dither algorithm only needs to a modulated signal to the principle of single-frequency dither algorithm, and
The phase-modulator 3 of each road laser is loaded into according to time-multiplexed mode timesharing/On, phase-control circuit 9/Timesharing is to each road
The modulated signal of light beam is demodulated, and the phase control signal timesharing that demodulation is obtained is loaded into the phase-modulator of each road laser
3/On.
At present, all there is certain deficiency in these phase control algorithm and phase-control circuit：
(1) control bandwidth of SPGD algorithm and single-frequency dither algorithm with control way bandwidth decline rapidly；
(2) many dither algorithms need multiple chattering frequencies, and circuit debugging is loaded down with trivial details, the response frequency scope to phase-modulator
Require too high；
(3) existing phase-control circuit is constituted based on monolithic programmable chip, and control way is limited, it is difficult to realize hundred tunnels
The phase controlling of the big array element optics coherence tomography system of level.
Content of the invention
It is an object of the invention to provide a kind of phase control method for big array element (hundred tunnel levels) optics coherence tomography and its
Control circuit, to overcome the above-mentioned deficiency of existing phase control algorithm and its control circuit.
A kind of phase control method for big array element optics coherence tomography, it is characterised in that：The modulation letter of phase control algorithm
Number constitute as follows：
Assume the common M of phase-modulator × N number of, corresponding laser way is also M × N road, algorithm exports M group signal altogether, i-th
Organizing signal is
Wherein HM(i, k) is modulated signal for the numerical value of the i-th row kth row of M rank hadamard matrix, k=1,2 ..., M, T
Cycle, t be the time；
(j-1) T to the jT moment, apply modulated signal y to (i-1) × N+j road phase-modulatori(t), wherein, i value
From 1 to M, j value from 1 to N；And repeat said process, until closing phase-control circuit.
The present invention provides a kind of phase-control circuit for big array element optics coherence tomography, including programmable chip (1), digital-to-analogue
Transducer (3), control signal modulate circuit (4), analog-digital converter (5) and input signal conditioning circuit (6), it is characterised in that：
Also include MUX (2).
Preferably, described MUX (2) for N, 1 MUX is selected.
Preferably, described MUX (2) is programmable logic chip.
Preferably, described MUX (2) is data selector chip.
Further, operation program described programmable chip (1) is included with lower module：There is module (7), signal in address
Generation module (8), signal demodulation module (9), multi-path choice module (10)；
It is that multi-path choice module (10) and MUX (2) provide address signal that the address occurs module (7), every
Time T updates primary address, so that the 1st road to N road input signal is exported from output signal successively, so circulates；
Described signal generating module (8) include M signal generator, each signal generator export one group of cycle for T but
It is different modulated signals；
Described signal processing module (9) include M group, have N number of signal demodulation module per group, j-th of i-th group is designated as 9-
Ij, works when the enable signal of multi-path choice module (10) is for high level, believes in the enable of multi-path choice module (10)
Quit work and keep control signal during number for low level, reset other intermediate parameters；
Described multi-path choice module (10) has M, and i-th described multi-path choice module (10) occurs mould according to address
The address signal that block (7) is produced, makes the signal output that (j-1) * T to j*T moment is input into from signal demodulation module 9-ij, while
It is high level to make the enable signal for being input to signal demodulation module 9-ij, and the enable signal of other signal demodulation modules is low electricity
Flat, and so on circulate, wherein i value is from 1 to M, j value from 1 to N.
Compared to existing technology, the technique effect of the present invention：
1st, the Laser coherent combining system structure of the present invention is identical with the system structure of many shakes, single-frequency dither algorithm, such as
Shown in Fig. 1-Fig. 3, difference is modulated signal difference, and the improvement of algorithm is that has invented new modulated signal, using orthogonal
Coding single-frequency modulation, for comparing many dither algorithms, without the need for the debugging signal of multiple frequencies, simplifies algorithm, is easy to hardware reality
Existing；For single-frequency dither algorithm, the way for applying phase modulation in certain time period is increased, improve control band
Wide.
2nd, the control signal timesharing of programmable chip 1 is passed to by different digital to analog converters using MUX 2
3, the maximum control way of control circuit in the case that 1 output pin of programmable chip is limited, is improved, hundred tunnels can be realized
The phase controlling of the big array element optics coherence tomography system of level.
Description of the drawings
Fig. 1 is existing Laser coherent combining system schematic；
Fig. 2 is existing many dither algorithms Laser coherent combining system schematic；
Fig. 3 is existing single-frequency dither algorithm Laser coherent combining system schematic；
Fig. 4 is existing phase-control circuit structural representation；
Fig. 5 is 4 × 3 road Laser coherent combining system schematic of orthogonal coding single-frequency dither algorithm of the present invention；
Fig. 6 is 8 × 3 road Laser coherent combining system schematic of the present invention
Fig. 7 is phase-control circuit structural representation of the present invention；
Fig. 8 is the program structure schematic diagram of phase-control circuit of the present invention.
Specific embodiment
Laser coherent combining system as shown in figure 1, the common M of phase-modulator × N number of, corresponding laser way is also M × N
Road.The modulated signal of phase control algorithm is constituted as follows：
Orthogonal coding single-frequency dither algorithm exports M group signal altogether, and i-th group of signal is constituted as follows：
HM(i, k) is the numerical value of the i-th row kth row of m rank hadamard matrix, k=1,2 ..., M.
(j-1) T to the jT moment, apply modulated signal y to (i-1) × N+j road phase-modulatori(t), i value from 1 to
M, j value is from 1 to N；And repeat said process, until closing phase-control circuit.
The phase control algorithm of phase control method of the present invention is described below by taking 4 × 3 road Laser coherent combining systems as an example
In modulated signal, as shown in Figure 5：
0 arrives the T moment, applies modulated signal y to No. 1st phase-modulator1T (), applies modulation to No. 4th phase-modulator
Signal y2T (), applies modulated signal y to No. 7th phase-modulator3T (), applies modulated signal y to No. 10th phase-modulator4
(t)；
In T to the 2T moment, apply modulated signal y to No. 2nd phase-modulator1T (), applies to adjust to No. 5th phase-modulator
Signal y processed2T (), applies modulated signal y to No. 8th phase-modulator3T (), applies modulated signal to No. 11st phase-modulator
y4(t)；
In 2T to the 3T moment, apply modulated signal y to No. 3rd phase-modulator1T (), applies to adjust to No. 6th phase-modulator
Signal y processed2T (), applies modulated signal y to No. 9th phase-modulator3T (), applies modulated signal to No. 12nd phase-modulator
y4(t)；
In 3T to the 4T moment, execute the process in 0 to T moment；In 4T to the 5T moment, execute the process in T to 2T moment；So follow
Ring, until closing phase-control circuit.
8 × 3 road Laser coherent combining systems are as shown in Figure 6：
0 arrives the T moment, applies modulated signal y to No. 1st phase-modulator1T (), applies modulation to No. 4th phase-modulator
Signal y2T (), applies modulated signal y to No. 7th phase-modulator3T (), applies modulated signal y to No. 10th phase-modulator4
T (), applies modulated signal y to No. 13rd phase-modulator5T (), applies modulated signal y to No. 16th phase-modulator6(t), to
No. 19th phase-modulator applies modulated signal y7T (), applies modulated signal y to No. 22nd phase-modulator8(t)；
In T to the 2T moment, apply modulated signal y to No. 2nd phase-modulator1T (), applies to adjust to No. 5th phase-modulator
Signal y processed2T (), applies modulated signal y to No. 8th phase-modulator3T (), applies modulated signal to No. 11st phase-modulator
y4T (), applies modulated signal y to No. 14th phase-modulator5T (), applies modulated signal y to No. 17th phase-modulator6(t),
Apply modulated signal y to No. 20th phase-modulator7T (), applies modulated signal y to No. 23rd phase-modulator8(t)；
In 2T to the 3T moment, apply modulated signal y to No. 3rd phase-modulator1T (), applies to adjust to No. 6th phase-modulator
Signal y processed2T (), applies modulated signal y to No. 9th phase-modulator3T (), applies modulated signal to No. 12nd phase-modulator
y4T (), applies modulated signal y to No. 15th phase-modulator5T (), applies modulated signal y to No. 18th phase-modulator6(t),
Apply modulated signal y to No. 21st phase-modulator7T (), applies modulated signal y to No. 24th phase-modulator8(t)；
In 3T to the 4T moment, execute the process in 0 to T moment；In 4T to the 5T moment, execute the process in T to 2T moment；So follow
Ring, until closing phase-control circuit.
Equally we can extend to the Laser coherent combining system of hundred tunnel levels, and 8 × 12 road Laser coherent combining systems are adjusted
Signal processed is as follows：
0 arrives the T moment, applies modulated signal y to No. 1st phase-modulator1T (), applies to adjust to No. 13rd phase-modulator
Signal y processed2T (), applies modulated signal y to No. 25th phase-modulator3T (), applies modulated signal to No. 37th phase-modulator
y4T (), applies modulated signal y to No. 49th phase-modulator5T (), applies modulated signal y to No. 61st phase-modulator6(t),
Apply modulated signal y to No. 73rd phase-modulator7T (), applies modulated signal y to No. 85th phase-modulator8(t)；
In T to the 2T moment, apply modulated signal y to No. 2nd phase-modulator1T (), applies to adjust to No. 14th phase-modulator
Signal y processed2T (), applies modulated signal y to No. 26th phase-modulator3T (), applies modulated signal to No. 38th phase-modulator
y4T (), applies modulated signal y to No. 50th phase-modulator5T (), applies modulated signal y to No. 62nd phase-modulator6(t),
Apply modulated signal y to No. 74th phase-modulator7T (), applies modulated signal y to No. 86th phase-modulator8(t)；
In 2T to the 3T moment, apply modulated signal y to No. 3rd phase-modulator1T (), applies to No. 15th phase-modulator
Modulated signal y2T (), applies modulated signal y to No. 27th phase-modulator3T (), applies modulation letter to No. 39th phase-modulator
Number y4T (), applies modulated signal y to No. 51st phase-modulator5T (), applies modulated signal y to No. 63rd phase-modulator6
T (), applies modulated signal y to No. 75th phase-modulator7T (), applies modulated signal y to No. 87th phase-modulator8(t)；
In 3T to the 4T moment, apply modulated signal y to No. 4th phase-modulator1T (), applies to No. 16th phase-modulator
Modulated signal y2T (), applies modulated signal y to No. 28th phase-modulator3T (), applies modulation letter to No. 40th phase-modulator
Number y4T (), applies modulated signal y to No. 52nd phase-modulator5T (), applies modulated signal y to No. 64th phase-modulator6
T (), applies modulated signal y to No. 76th phase-modulator7T (), applies modulated signal y to No. 88th phase-modulator8(t)；
In 4T to the 5T moment, apply modulated signal y to No. 5th phase-modulator1T (), applies to No. 17th phase-modulator
Modulated signal y2T (), applies modulated signal y to No. 29th phase-modulator3T (), applies modulation letter to No. 41st phase-modulator
Number y4T (), applies modulated signal y to No. 53rd phase-modulator5T (), applies modulated signal y to No. 65th phase-modulator6
T (), applies modulated signal y to No. 77th phase-modulator7T (), applies modulated signal y to No. 89th phase-modulator8(t)；
In 5T to the 6T moment, apply modulated signal y to No. 6th phase-modulator1T (), applies to No. 18th phase-modulator
Modulated signal y2T (), applies modulated signal y to No. 30th phase-modulator3T (), applies modulation letter to No. 42nd phase-modulator
Number y4T (), applies modulated signal y to No. 54th phase-modulator5T (), applies modulated signal y to No. 66th phase-modulator6
T (), applies modulated signal y to No. 78th phase-modulator7T (), applies modulated signal y to No. 90th phase-modulator8(t)；
In 6T to the 7T moment, apply modulated signal y to No. 7th phase-modulator1T (), applies to No. 19th phase-modulator
Modulated signal y2T (), applies modulated signal y to No. 31st phase-modulator3T (), applies modulation letter to No. 43rd phase-modulator
Number y4T (), applies modulated signal y to No. 55th phase-modulator5T (), applies modulated signal y to No. 67th phase-modulator6
T (), applies modulated signal y to No. 79th phase-modulator7T (), applies modulated signal y to No. 91st phase-modulator8(t)；
In 7T to the 8T moment, apply modulated signal y to No. 8th phase-modulator1T (), applies to No. 20th phase-modulator
Modulated signal y2T (), applies modulated signal y to No. 32nd phase-modulator3T (), applies modulation letter to No. 44th phase-modulator
Number y4T (), applies modulated signal y to No. 56th phase-modulator5T (), applies modulated signal y to No. 68th phase-modulator6
T (), applies modulated signal y to No. 80th phase-modulator7T (), applies modulated signal y to No. 92nd phase-modulator8(t)；
In 8T to the 9T moment, apply modulated signal y to No. 9th phase-modulator1T (), applies to No. 21st phase-modulator
Modulated signal y2T (), applies modulated signal y to No. 33rd phase-modulator3T (), applies modulation letter to No. 45th phase-modulator
Number y4T (), applies modulated signal y to No. 57th phase-modulator5T (), applies modulated signal y to No. 69th phase-modulator6
T (), applies modulated signal y to No. 81st phase-modulator7T (), applies modulated signal y to No. 93rd phase-modulator8(t)；
In 9T to the 10T moment, apply modulated signal y to No. 10th phase-modulator1T (), applies to No. 22nd phase-modulator
Plus modulated signal y2T (), applies modulated signal y to No. 34th phase-modulator3T (), applies modulation to No. 46th phase-modulator
Signal y4T (), applies modulated signal y to No. 58th phase-modulator5T (), applies modulated signal y to No. 70th phase-modulator6
T (), applies modulated signal y to No. 82nd phase-modulator7T (), applies modulated signal y to No. 94th phase-modulator8(t)；
In 10T to the 11T moment, apply modulated signal y to No. 11st phase-modulator1T (), applies to No. 23rd phase-modulator
Plus modulated signal y2T (), applies modulated signal y to No. 35th phase-modulator3T (), applies modulation to No. 47th phase-modulator
Signal y4T (), applies modulated signal y to No. 59th phase-modulator5T (), applies modulated signal y to No. 71st phase-modulator6
T (), applies modulated signal y to No. 83rd phase-modulator7T (), applies modulated signal y to No. 95th phase-modulator8(t)；
In 11T to the 12T moment, apply modulated signal y to No. 12nd phase-modulator1T (), applies to No. 24th phase-modulator
Plus modulated signal y2T (), applies modulated signal y to No. 36th phase-modulator3T (), applies modulation to No. 48th phase-modulator
Signal y4T (), applies modulated signal y to No. 60th phase-modulator5T (), applies modulated signal y to No. 72nd phase-modulator6
T (), applies modulated signal y to No. 84th phase-modulator7T (), applies modulated signal y to No. 96th phase-modulator8(t)；
In 13T to the 14T moment, execute the process in 0 to T moment；In 14T to the 15T moment, execute the process in T to 2T moment；So
Circulation, until closing phase-control circuit.
A kind of phase-control circuit for big array element optics coherence tomography as shown in Figure 7, including programmable chip 1, digital-to-analogue
Transducer 3, control signal modulate circuit 4, analog-digital converter 5 and input signal conditioning circuit 6, it is characterised in that：Also include many
Road selector 2.
Preferably, the MUX 2 selects 1 MUX for N.
Preferably, the MUX 2 is programmable logic chip.
Preferably, the MUX 2 is data selector chip.
As shown in figure 8, the operation program of the programmable chip 1 is included with lower module：Address occurs module 7, signal to send out
Raw module 8, signal demodulation module 9, multi-path choice module 10；
It is that multi-path choice module 10 and MUX 2 provide address signal that the address occurs module 7, every time T
Primary address is updated, so that the 1st road to N road input signal is exported from output signal successively, so circulate；
The signal generating module 8 includes M signal generator, and each signal generator exports one group of cycle for T still
Different modulated signals；
The signal processing module 9 includes M group, has N number of signal demodulation module per group, and j-th of i-th group is designated as 9-
Ij, works when the enable signal of the multi-path choice module 10 is for high level, in the enable signal of multi-path choice module 10 is
Quit work during low level and control signal is kept, reset other intermediate parameters；
Described multi-path choice module 10 has M, and i-th described multi-path choice module 10 occurs module 7 according to address
The address signal of generation, makes the signal output that (j-1) * T to j*T moment is input into from signal demodulation module 9-ij, while making defeated
The enable signal for entering to signal demodulation module 9-ij is high level, the enable signal of other signal demodulation modules be low level, such as
This reciprocation cycle, wherein i value are from 1 to M, j value from 1 to N.
Those skilled in the art will be clear that the scope of the present invention is not restricted to example discussed above, it is possible to which which is carried out
Some changes and modification, without deviating from the scope of the present invention that appended claims are limited.Although oneself is through in accompanying drawing and explanation
Illustrate and describe the present invention in book in detail, but such explanation and description are only explanations or schematic, and nonrestrictive.
The present invention is not limited to the disclosed embodiments.
By to accompanying drawing, the research of specification and claims, when the present invention is implemented, those skilled in the art are permissible
Understand and realize the deformation of the disclosed embodiments.In detail in the claims, term " including " is not excluded for other steps or element,
And indefinite article " one " or " one kind " be not excluded for multiple.The some measures that quotes in mutually different dependent claims
The fact does not mean that the combination of these measures can not be advantageously used.It is right that any reference marker in claims is not constituted
The restriction of the scope of the present invention.
Claims (6)
1. a kind of phase control method for big array element optics coherence tomography, it is characterised in that：The modulated signal of phase control algorithm
Constitute as follows：
The common M of hypothesis phase-modulator × N number of, corresponding laser way is also M × N road, and algorithm exports M group signal, i-th group of letter altogether
Number it is
Wherein HM(i, k) is the numerical value of the i-th row kth row of M rank hadamard matrix, and k=1,2 ..., M, T are the week of modulated signal
Phase, t is the time；
(j-1) T to the jT moment, apply modulated signal y to (i-1) × N+j road phase-modulatori(t), wherein, i value from 1 to
M, j value is from 1 to N；And repeat said process, until closing phase-control circuit.
2. a kind of phase-control circuit for big array element optics coherence tomography, including programmable chip (1), digital to analog converter (3), controls
Signal conditioning circuit (4) processed, analog-digital converter (5) and input signal conditioning circuit (6), it is characterised in that：Also include that multichannel is selected
Select device (2).
3. the phase-control circuit of big array element optics coherence tomography is used for as claimed in claim 2, it is characterised in that：The multichannel choosing
Selecting device (2) 1 MUX is selected for N.
4. the phase-control circuit of big array element optics coherence tomography is used for as claimed in claim 2, it is characterised in that：The multichannel choosing
Device (2) is selected for programmable logic chip.
5. the phase-control circuit of big array element optics coherence tomography is used for as claimed in claim 2, it is characterised in that：The multichannel choosing
Device (2) is selected for data selector chip.
6. the phase-control circuit for big array element optics coherence tomography as described in claim 2 to 5 is arbitrary, it is characterised in that：Institute
The operation program for stating programmable chip (1) is included with lower module：There is module (7), signal generating module (8), signal solution in address
Mode transfer block (9), multi-path choice module (10)；
It is that multi-path choice module (10) and MUX (2) provide address signal that the address occurs module (7), every the time
T updates primary address, so that the 1st road to N road input signal is exported from output signal successively, so circulates；
Described signal generating module (8) include M signal generator, and each signal generator exports one group of cycle for T still not
Same modulated signal；
Described signal processing module (9) include M group, have N number of signal demodulation module per group, j-th of i-th group is designated as 9-ij,
Work when the enable signal of multi-path choice module (10) is for high level, in the enable signal of multi-path choice module (10) be
Quit work during low level and control signal is kept, reset other intermediate parameters；
Described multi-path choice module (10) has M, and i-th described multi-path choice module (10) occurs module according to address
(7) address signal for producing, makes the signal output that (j-1) * T to j*T moment is input into from signal demodulation module 9-ij, while making
The enable signal for being input to signal demodulation module 9-ij is high level, and the enable signal of other signal demodulation modules is low level,
And so on circulate, wherein i value is from 1 to M, j value from 1 to N.
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| CN112202040A (en) * | 2020-10-12 | 2021-01-08 | 中国人民解放军国防科技大学 | Laser array piston phase control method |
| CN114006247A (en) * | 2021-11-03 | 2022-02-01 | 中国人民解放军国防科技大学 | Phase control system and method based on space-time-frequency multi-domain information |
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| CN108507688A (en) * | 2018-04-10 | 2018-09-07 | 中国人民解放军国防科技大学 | Phase detection and control method for large number of laser arrays |
| CN108507688B (en) * | 2018-04-10 | 2019-05-03 | 中国人民解放军国防科技大学 | Phase detection and control method for large number of laser arrays |
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| CN109802291B (en) * | 2019-02-18 | 2019-12-20 | 中国人民解放军国防科技大学 | Optical fiber laser aperture coherent synthesis phase control method based on deep learning |
| CN112202040A (en) * | 2020-10-12 | 2021-01-08 | 中国人民解放军国防科技大学 | Laser array piston phase control method |
| CN112202040B (en) * | 2020-10-12 | 2021-12-03 | 中国人民解放军国防科技大学 | Laser array piston phase control method |
| CN114006247A (en) * | 2021-11-03 | 2022-02-01 | 中国人民解放军国防科技大学 | Phase control system and method based on space-time-frequency multi-domain information |
| CN114859566A (en) * | 2022-04-18 | 2022-08-05 | 中国科学院光电技术研究所 | Multi-path laser splicing and synthesizing system based on automatic light path alignment and pointing accurate control |
| CN114859566B (en) * | 2022-04-18 | 2023-03-31 | 中国科学院光电技术研究所 | Multi-path laser splicing and synthesizing system based on automatic light path alignment and pointing accurate control |
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