CN102231472A - Laser pulse synchronization control device - Google Patents
Laser pulse synchronization control device Download PDFInfo
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- CN102231472A CN102231472A CN 201110096427 CN201110096427A CN102231472A CN 102231472 A CN102231472 A CN 102231472A CN 201110096427 CN201110096427 CN 201110096427 CN 201110096427 A CN201110096427 A CN 201110096427A CN 102231472 A CN102231472 A CN 102231472A
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Abstract
The invention discloses a laser pulse synchronization control device which is connected with M paths of laser pulse sources, wherein M is a natural number larger than 1. The laser pulse synchronization control device is characterized in that: except one path, each of other paths of the laser pulse source sequentially comprises a spectroscope, a static light delayer and a dynamic light delaying module, and the one path of the laser pulse source sequentially comprises a spectroscope and a static light delayer; laser pulse sub-beams of the spectroscope of each path are input to each photo detector, and outputs of the photo detectors are connected with a delay controller; and the delay controller controls and is connected with each dynamic light delaying module. The laser pulse synchronization control device breaks through a traditional synchronization method for controlling the current electro-optical Q-switching trigger time by utilizing the feedback of previous pulse period data, and carries out fast signal processing and delay time modification by utilizing static light delay and detecting current pulse, thus pulse synchronization accuracy can be further improved, and more application requirements are met.
Description
Technical field
The present invention relates to the photoelectron technology field, be specifically related to a kind of laser pulse sync control device that can improve synchronization accuracy.
Background technology
High-energy, high-peak power laser have important in laser processing, laser nonlinear effect and remote sensing field and use widely.It is the main mode that obtains high-energy and high-peak power output that laser is transferred Q.For satisfying application demand, the method that further improves energy and peak power mainly comprises: strengthen pumping and inject, multi-stage cascade amplifies and many element laser synthesizes synchronously.Because the restriction of laser thermal effect, pumping are injected when increasing to a certain degree, laser output energy and power can occur saturated.Synchronously synthetic the amplification with cascade of many element laser compared, and it is simple to have monotechnics, good heat management, and good laser transmission characteristic, advantages such as the good and flexible configuration of system extension have wide and important development and application prospect.Key technology during many element laser is synchronously synthetic be laser pulse synchronously, i.e. in time accurately overlapping of two bundles or multiple laser pulse.
The adjustable Q laser pulse width is generally ns or ten ns magnitudes.Traditional laser pulse method for synchronous is transferred Q to trigger constantly by control and is realized.At first each road laser output pulse is sampled, determine the relative time error that each road laser pulse produces, time difference signal is carried out analyzing and processing, and the electric-optically Q-switched triggering in the next pulse cycle of each laser of FEEDBACK CONTROL constantly, and laser pulse is exported synchronously.Adopt this method impulsive synchronization precision can reach ± 1ns about (list of references: Shang Weidong etc., the time domain analysis of Nd3+:YAG solid state laser electric-optically Q-switched laser pulse, infrared and laser engineering, 2009, the 38th the volume, the 4th phase, 633-636 page or leaf).But, because laser output is with respect to the uncertainty of the time-delay of transferring the Q triggering signal, be the laser pulse uncertainty of settling time, make the electric-optically Q-switched precision that triggers laser pulse method for synchronous constantly in next pulse cycle of this each laser of FEEDBACK CONTROL be difficult to further raising.
Summary of the invention
Problem to be solved by this invention is: how a kind of laser pulse sync control device is provided, and next pulse cycle electric-optically Q-switched that can overcome present each laser of FEEDBACK CONTROL triggers the defective of laser pulse method for synchronous constantly, further improves the laser pulse synchronization accuracy.
Technical problem proposed by the invention is to solve like this: a kind of laser pulse sync control device is provided, connect M road laser pulse source, M is the natural number greater than 1, it is characterized in that: other each road laser pulses comprise successively spectroscope, static light delayer and dynamic light time delay module are set from being input to output except that one the tunnel, and described one the road then comprises successively spectroscope and static light delayer are set from being input to output; Photodetector is separately imported in described spectroscopical laser pulse beam splitting on every road, and described photodetector is all exported the connection delay controller; Each described dynamic light time delay module of described delay controller control connection.
According to laser pulse sync control device provided by the present invention, M=2.
According to laser pulse sync control device provided by the present invention, 3≤M＜1000.
According to laser pulse sync control device provided by the present invention, described dynamic light time delay module comprises the dynamic light delay unit of electric light driver and connection thereof N, and N is the natural number between 3 to 100; Each dynamic light delay unit all comprises four polarization spectroscopes of electric light light polarization modulator and control connection thereof; Two are positioned on the same straight line of input optical pulse in described four polarization spectroscopes, and two are positioned on the input optical pulse parallel lines in addition.
Beneficial effect of the present invention is: 1, traditional impulsive synchronization method is revised the time of delay of transferring the Q triggering signal of telecommunication by the optical pulse time difference of measuring in the pulse period of having launched, makes synchronization accuracy be approximately equal to the light pulse shake of settling time; 2, the present invention's proposition is poor by the two-beam burst length of detecting in the current pulse period, and carries out fast signal processing and correction time of delay, further improves the impulsive synchronization precision.
Description of drawings
Fig. 1 is the structural representation of first embodiment of a kind of laser pulse sync control device that improves synchronization accuracy provided by the invention;
Fig. 2 is the first dynamic optical time delay unit structural representation among first embodiment of a kind of laser pulse sync control device that improves synchronization accuracy provided by the invention;
Fig. 3 is the structural representation of second embodiment of a kind of laser pulse sync control device that improves synchronization accuracy provided by the invention.
Wherein Reference numeral is: 1-first spectroscope, 2-first photodetector, 3-second spectroscope, 4-second photodetector, the 5-first static light delayer, the 6-second static light delayer, the 7-delay controller, the 8-first dynamic optical time delay unit, first delay control signal of 9-delay controller output, 10-first incident light pulse, 11-second incident light pulse, the 12-first emergent light pulse, the 13-second emergent light pulse, the time difference of 14-first and second incident light pulses, 15-electric light driver, 16-electric light drive signal, the input optical pulse of the 17-first dynamic optical time delay unit, the 18-first electric light light polarization modulator, the 19-second electric light light polarization modulator, 20-the 3rd electric light light polarization modulator, 21-first polarization spectroscope, 22-second polarization spectroscope, 23-the 3rd polarization spectroscope, 24-the 4th polarization spectroscope, 25-the 5th polarization spectroscope, 26-the 6th polarization spectroscope, 27-the 7th polarization spectroscope, 28-the 8th polarization spectroscope, 29-the 9th polarization spectroscope, 30-the tenth polarization spectroscope, 31-the 11 polarization spectroscope, 32-the 12 polarization spectroscope, the 33-first dynamic light delay unit, the 34-second dynamic light delay unit, 35-the 3rd dynamic light delay unit, the output optical pulse of the dynamic optical time delay unit of 36-, 37-the 3rd incident light pulse, 38-the 3rd spectroscope, 39-the 3rd photodetector, 40-the 3rd static light delayer, the 41-second dynamic optical time delay unit, second delay control signal of 42-delay controller output, 43-the 3rd emergent light pulse, the time difference of 44-first and the 3rd incident light pulse.
Embodiment
At first, inventive concept is described:
The two-beam burst length of detecting in the current pulse period is poor, and carries out fast signal processing and correction time of delay.One of wherein crucial: the static light delayer in the light pulse of every road is handled for fast signal and revised time of delay provides time enough.
The second, below in conjunction with accompanying drawing the present invention is further described:
First embodiment of the laser pulse isochronous controller of raising synchronization accuracy provided by the invention, structure comprises as shown in Figure 1: first spectroscope 1, second spectroscope 3, first photodetector 2, second photodetector 4, the first static light delayer 5, the second static light delayer 6, delay controller 7, the first dynamic optical time delay unit 8; First incident light pulse 10 is divided into two bundles by first spectroscope 1, a branch of input first photodetector 2, another bundle input first static light delayer 5, output then; Second incident light pulse 11 is divided into two bundles by second spectroscope 3, a branch of input second photodetector 4, and the light pulse of another bundle input second static light delayer 6, the second static light delayers 6 outputs is imported the first dynamic optical time delay unit 8, output then again; The output signal of telecommunication input time delay controller 7 of first photodetector 2 and second photodetector 4; First delay control signal, 9 inputs, the first dynamic optical time delay unit 8 of delay controller 7 outputs.
Its operation principle is: two inlet same distance places at distance laser pulse isochronous controller are provided with first spectroscope 1 and second spectroscope 3 respectively, and the light signal that sampling is obtained is imported first photodetector 2 and second photodetector 4 respectively.Its output signal input time delay controller 7 carries out fast signal to be handled, and produces first delay control signal 9 and imports the first dynamic optical time delay unit 8.The first dynamic optical time delay unit 8 carries out quick light time-delay state and switches, and meets the requirements of the light delay time.The first static light delayer 5 and the second static light delayer 6 are set in light path simultaneously, two light pulses produce fixing time-delay therein respectively, make second incident light pulse 11 before arriving the first dynamic optical time delay unit 8, delay controller 7 and electric light driver 15 have time enough to carry out signal processing.Simultaneously, static light delayer 5 and 6 delay value can carry out manual adjustments, thereby have the effect of calibration light path.By changing the delay value of the first dynamic optical time delay unit 8, revise the delay value of second incident light pulse 11 fast, make light pulse 10 and 11 arrive the correspondence outlet of laser pulse isochronous controller simultaneously, reach the purpose of accurate control laser pulse synchronism.
The first dynamic optical time delay unit 8, structure comprises as shown in Figure 2: electric light driver 15, first dynamic light delay unit 33, second dynamic light delay unit 34 to the N dynamic light delay units 35, wherein N is the positive integer between 3 to 100, N gets 3 here; First delay control signal, the 9 input electric light drivers 15 of delay controller 7 outputs, the electric light light polarization modulator 18 to 20 of output signal 16 inputs first dynamic light delay unit 33 to the 3rd dynamic light delay units 35 of electric light driver 15; The first dynamic light delay unit 33 comprises the first electric light light polarization modulator 18, first to the 4th polarization spectroscope 21 to 24, when the driving voltage of the first electric light light polarization modulator 18 is zero, the input optical pulse 17 of this unit 33 polarization direction by this modulator 18 time is constant, light pulse 17 sees through first and second polarization spectroscopes 21 and 22 back inputs, the second dynamic light delay unit 34 successively, when the driving voltage of the first electric light light polarization modulator 18 is half-wave voltage, light pulse is successively by first, the 3rd, the 4th and second polarization spectroscope 21,23, the second dynamic light delay unit 34 is then imported in 24 and 22 reflections; By that analogy, the 3rd dynamic light delay unit 35 comprises the 3rd electric light light polarization modulator the 20, the 9th to the 12 polarization spectroscope 29 to 32, when the driving voltage of the 3rd electric light light polarization modulator 20 is zero, the input optical pulse of this unit 35 polarization direction by this modulator 20 time is constant, light pulse sees through the 9th and the tenth polarization spectroscope 29 and 30 back outputs successively, when the driving voltage of the 3rd electric light light polarization modulator 20 is half-wave voltage, light pulse is successively by the the 9th, the 11, the 12 and the tenth polarization spectroscope 29,31,32 and 30 reflections, then output.
Its operation principle is:
(1) first kind of type of drive
For the first dynamic light delay unit 33, driving voltage at electric light light polarization modulator 18 is respectively under two kinds of situations of zero-sum half-wave voltage, light pulse 17 is the light path sum of first polarization spectroscope, 21 to the 3rd polarization spectroscopes 23 and the 4th polarization spectroscope 24 to second polarization spectroscopes 22 by the relative optical path difference of this unit 33, and corresponding light delay inequality is DL1.The corresponding delay inequality DL2 that gets the second dynamic light delay unit 34 is 2 times of DL1, and by that analogy, the delay inequality DLN of the dynamic light delay unit 35 of N is 2N a times of DL1.Therefore, the driving voltage (zero or half-wave voltage) by each electrooptic crystal is set can obtain the zero relative time delay value to 2N+1 times of DL1, and the time-delay stepping is DL1.For example for the laser pulse isochronous controller is reached ± the time-delay control precision of 100ps, desirable DL1 is 100ps, and getting N is 3, can obtain 0 to 0.7ns reference time delay, and getting N is 5, can obtain 0 to 3.2ns reference time delay.
(2) second kinds of type of drive
The first dynamic optical time delay unit 8 also can adopt second kind of type of drive, be with above-mentioned type of drive difference, when the driving voltage of the described first electric light light polarization modulator 18 is zero, described light pulse is successively by first, the 3rd, the 4th and second polarization spectroscope 21,23,24 and 22 reflections, then import the second dynamic light delay unit 34, when the driving voltage of the described first electric light light polarization modulator 18 was half-wave voltage, described light pulse saw through first and second polarization spectroscopes 21 and 22 back inputs, the second dynamic light delay unit 34 successively; By that analogy, when the driving voltage of described N electric light light polarization modulator 20 is zero, described light pulse is successively by 4N-3,4N-1,4N and 4N-2 polarization spectroscope 29,31,32 and 30 reflections, output then, when the driving voltage of described N electric light light polarization modulator 20 was half-wave voltage, described light pulse saw through 4N-3 and 4N-2 polarization spectroscope 29 and 30 back outputs successively.
Fig. 3 is second embodiment of the laser pulse isochronous controller of raising synchronization accuracy provided by the invention, the number of incident light pulse, spectroscope, photodetector and static light delayer is increased to M, M is the positive integer between 3 to 1000, here getting M is 3, and the number of the output delay control signal of delay controller 7 and dynamic optical time delay unit is increased to 2.The 3rd incident light pulse 37 is divided into two bundles by the 3rd spectroscope 38, a branch of input the 3rd photodetector 39, and the light pulse of another bundle input the 3rd static light delayer 40, the three static light delayers 40 outputs is imported the second dynamic optical time delay unit 41, output then again; The output signal of telecommunication input time delay controller 7 of the 3rd photodetector 39; Second delay control signal, 42 inputs, the second dynamic optical time delay unit 41 of delay controller 7 outputs.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of claim of the present invention.
Claims (4)
1. laser pulse sync control device, connect M road laser pulse source, M is the natural number greater than 1, it is characterized in that: other each road laser pulses comprise successively spectroscope, static light delayer and dynamic light time delay module are set from being input to output except that one the tunnel, and described one the road then comprises successively spectroscope and static light delayer are set from being input to output; Photodetector is separately imported in described spectroscopical laser pulse beam splitting on every road, and described photodetector is all exported and connected delay controller (7); Each described dynamic light time delay module of described delay controller (7) control connection.
2. laser pulse sync control device according to claim 1 is characterized in that: M=2.
3. laser pulse sync control device according to claim 1 is characterized in that: 3≤M＜1000.
4. laser pulse sync control device according to claim 1 is characterized in that: N the dynamic light delay unit that described dynamic light time delay module comprises electric light driver (15) and connects, and N is the natural number between 3 to 100; Each dynamic light delay unit all comprises four polarization spectroscopes of electric light light polarization modulator (18) and control connection thereof; Two are positioned on the same straight line of input optical pulse in described four polarization spectroscopes, and two are positioned on the input optical pulse parallel lines in addition.
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Cited By (7)
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| CN103197577A (en) * | 2012-01-06 | 2013-07-10 | 沈阳新松机器人自动化股份有限公司 | Method and device for robot controller pulse synchronous adjustment |
| CN103259156A (en) * | 2012-02-20 | 2013-08-21 | 中国科学院理化技术研究所 | Device for generating high-average-power high-repetition-frequency pulse sodium beacon laser |
| CN104964751A (en) * | 2015-07-01 | 2015-10-07 | 北京无线电计量测试研究所 | Device and method for relative time synchronization based on ultrashort pulses |
| CN107534265A (en) * | 2015-03-30 | 2018-01-02 | 奥里巴Abx股份有限公司 | Method and apparatus for trigger pulse light source |
| CN108332611A (en) * | 2017-12-15 | 2018-07-27 | 无锡亮源激光技术有限公司 | System and method for improving Laser Measuring according to device encoding precision |
| CN112247342A (en) * | 2020-09-29 | 2021-01-22 | 北京卓镭激光技术有限公司 | Switching light editable laser processing system and method |
| CN112928582A (en) * | 2021-01-25 | 2021-06-08 | 中国人民解放军陆军工程大学 | Non-phase measurement automatic synchronization method of passive coherent synthesis laser |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197577A (en) * | 2012-01-06 | 2013-07-10 | 沈阳新松机器人自动化股份有限公司 | Method and device for robot controller pulse synchronous adjustment |
| CN103197577B (en) * | 2012-01-06 | 2015-11-04 | 沈阳新松机器人自动化股份有限公司 | Robot controller impulsive synchronization method of adjustment and device |
| CN103259156A (en) * | 2012-02-20 | 2013-08-21 | 中国科学院理化技术研究所 | Device for generating high-average-power high-repetition-frequency pulse sodium beacon laser |
| CN103259156B (en) * | 2012-02-20 | 2015-03-18 | 中国科学院理化技术研究所 | Device for generating high-average-power high-repetition-frequency pulse sodium beacon laser |
| CN107534265A (en) * | 2015-03-30 | 2018-01-02 | 奥里巴Abx股份有限公司 | Method and apparatus for trigger pulse light source |
| CN107534265B (en) * | 2015-03-30 | 2019-10-01 | 奥里巴Abx股份有限公司 | Method and apparatus for trigger pulse light source |
| CN104964751A (en) * | 2015-07-01 | 2015-10-07 | 北京无线电计量测试研究所 | Device and method for relative time synchronization based on ultrashort pulses |
| CN108332611A (en) * | 2017-12-15 | 2018-07-27 | 无锡亮源激光技术有限公司 | System and method for improving Laser Measuring according to device encoding precision |
| CN108332611B (en) * | 2017-12-15 | 2023-06-27 | 无锡亮源激光技术有限公司 | System and method for improving coding precision of laser measuring device |
| CN112247342A (en) * | 2020-09-29 | 2021-01-22 | 北京卓镭激光技术有限公司 | Switching light editable laser processing system and method |
| CN112928582A (en) * | 2021-01-25 | 2021-06-08 | 中国人民解放军陆军工程大学 | Non-phase measurement automatic synchronization method of passive coherent synthesis laser |
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Application publication date: 20111102 |