CN100580538C - Method for obtaining four bundles of pulse coherent light by two pulse lasers - Google Patents
Method for obtaining four bundles of pulse coherent light by two pulse lasers Download PDFInfo
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- CN100580538C CN100580538C CN200710123314A CN200710123314A CN100580538C CN 100580538 C CN100580538 C CN 100580538C CN 200710123314 A CN200710123314 A CN 200710123314A CN 200710123314 A CN200710123314 A CN 200710123314A CN 100580538 C CN100580538 C CN 100580538C
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Abstract
Two pulse YAG lasers are used for obtaining four high-energy coherent pulsed beams with the wavelength of 532nm. One injection seeding pulse YAG laser 1 with a frequency multiplier and a beam splitting device is firstly used for generating two pulsed lasers with the wavelength of 1064nm and 532nm, wherein, light with the wavelength of 1064nm further generates two pulsed lasers with the wavelength of 1064nm and 532nm after passing a frequency multiplying crystal. Therefore, two coherent pulsed beams with the wavelength of 532nm can be obtained by the injection seeding pulse YAG laser 1. The obtained light with the wavelength of 1064nm after the beam splitting is taken as the seed light to be introduced to the amplification stage of the other pulse YAG laser 2 with the frequency multiplier and the beam splitting device, and two new pulsed lasers respectively with the wavelength of 1064nm and 532nm are obtained after the amplification ; wherein, the light with the wavelength of 1064nm further generates two pulsed lasers with the wavelength of 1064nm and 532nm after passing the frequency multiplying crystal. Therefore, two coherent pulsed beams with the wavelength of 532nm can be obtained by the pulse YAG laser 2. Flash lights and Q switches of the two lasers respectively use four lines of pulse signals which are output by a high-precision pulse generating and delaying device for control, thereby ensuring the constant phase difference between the two lasers. Therefore, four coherent pulsed beams with the wavelength of 532nm can be obtained.
Description
Technical field
The invention belongs to field of photoelectric technology.The various application that needs obtained simultaneously multi beam pulse coherence light have good using value.
Background technology
Often need utilize the multi beam coherent light simultaneously in a lot of fields such as holography, laser radar.The most frequently used method is that the beam of laser of a laser instrument output is carried out beam splitting.But this can reduce every bundle light intensity greatly.If the use multi-station laser then is difficult to guarantee the unanimity of multiple laser on frequency, initial phase, can't obtain the multi beam coherent light.Although adopt some special technique to obtain the multi beam coherent light at the indoor multi-station laser of experiment, these technology are often quite complicated.Therefore, up to the present, still there are not to obtain with multi-station laser easily in actual applications the effective ways of multi beam coherent light.
The present invention proposes a kind of new technology, can obtain the multi beam coherent light with multi-station laser easily in actual applications.
Summary of the invention
The present invention adopts the seed injecting principle, and the output beam that guarantees multi-station laser is at a frequency and a strict conformance of going up mutually, thus the high-intensity coherent light of acquisition multi beam.The present invention includes following components: (1) seed injected pulse YAG laser instrument; (2) pulsed YAG laser devices; (3) pulse generations and chronotrons; (4) one cover beam shaping systems; (5) two frequency-doubling crystals; The high anti-and high saturating level crossing of visible light (532nm) of (6) one covers infrared (1064nm).
One, principle of work:
The single longitudinal mode pulse laser beam that produces with a seed injected pulse laser instrument is injected into another pulsed laser as seed light, by the various control measure is that two laser instruments have identical frequency and polarization platform, and have constant initial position and differ, thereby obtain the multi beam coherent light.
Two, implementation method:
Describe principle of work of the present invention and implementation method in detail below in conjunction with accompanying drawing 1.
(1) the exportable two bundle laser of seed injected pulse YAG laser instrument 1 (containing frequency multiplication and beam splitting arrangement): account for the blue beam of the 532nm of gross energy 50%, and the infrared light that accounts for the 1064nm of gross energy 50%.The green glow of 532nm is as our output beam.
(2) frequency-doubling crystal is placed on the light path of 1064nm light beam of seed injected pulse YAG laser instrument 1 output, produce power is almost equal, wavelength is respectively 1064nm and the two bundle of pulsed laser of 532nm.This two-beam is behind level crossing M, and the light of 1064nm is reflected to other directions, and the light transmission level crossing of 532nm is as the second bundle output beam.
(3) through the light of the 1064m of level crossing M reflection again through two face mirror M reflections, enter beam shaping system.By the amplifier stage that enters pulsed YAG laser device 2 after the beam shaping system outgoing as seed light.The effect of beam shaping system is to make the seed light beam of the amplifier stage that enters pulsed YAG laser device 2 satisfy the requirement of this laser instrument amplifier stage to the input beam spot size and the angle of divergence.
(4) amplifier stage of pulsed YAG laser device 2 amplifies seed light beam, restraints laser through laser instrument 2 frequency multiplication and beam splitting arrangements exportable two own: account for the blue beam of the 532nm of gross energy 50%, and the infrared light that accounts for the 1064nm of gross energy 50%.Wherein, the green glow of 532nm is as our three beams output beam.
(5) infrared light of the 1064nm that is produced by pulsed YAG laser device 2 is again through a frequency-doubling crystal, and produce power is almost equal, wavelength is respectively 1064nm and the two bundle of pulsed laser of 532nm.This two-beam is behind level crossing M, and the light of 1064nm is reflected to other directions, and the light transmission level crossing of 532nm is as the 4th bundle output beam.
(6) light of the 1064nm that is reflected in step (five) can continue to produce more 532nm output beam as seed light through the step of above-mentioned (three) to (five).
(7) pulse electrical signal of exporting with four roads of pulse generation of a high precision four-way and deferred mount is controlled the pumping flashlamp of two laser instruments and the work of Q-switch respectively, guarantees that every laser instrument all obtains maximum energy output.The output time and the pulse width of the pulse electrical signal of these four road outputs are all carried out strictness control according to the performance index of two laser instruments.If will obtain more output beam, use many pulse generations and deferred mount.
(8) for guaranteeing that each output beam has identical polarization state, the output beam that should make every laser instrument changes to avoid the reflex time polarization state for strict vertical polarization.
(9) though the oscillator stage of pulsed laser 2 does not use, that is, the output light of oscillator stage does not enter amplifier stage, for guaranteeing the thermal stability of this laser instrument, the oscillator stage of this laser instrument is in running order all the time.
Three, advantage of the present invention:
1) owing to the seed injection mode, the frequency strict conformance of each output beam;
2) each output beam has identical polarization platform;
3) control the pumping flashlamp of two laser instruments and the work of Q-switch respectively with the pulse electrical signal of high precision pulse generation and deferred mount output, guaranteed that two laser instruments have constant phasic difference;
4) above 3 really reported four bundles or more multi beam output light have extraordinary coherence;
5) be convenient to obtain the high-octane coherent pulse laser beam of multi beam.
Description of drawings
Two pulsed lasers of accompanying drawing 1. usefulness obtain 4 bundle coherent pulse laser beam simultaneously.
M is high anti-to 1064m light among the figure, to the high saturating level crossing of 532nm light.
Accompanying drawing 2. beam shaping systems.
The inner structure of accompanying drawing 3. pulsed lasers 2.
Claims (1)
1. method that obtains 4 beam pulse coherent lights with two pulsed lasers: the light of the 532nm that produces with a seed injected pulse YAG laser instrument 1 is as the first bundle output beam; The wavelength of light after becoming frequency multiplication behind the frequency-doubling crystal of the 1064nm that seed injected pulse YAG laser instrument 1 produces is that 532nm and remaining wavelength are the 1064nm two-beam, and wherein, wavelength is that the light of 532nm is restrainted output beam as second; And being the light of 1064nm, wavelength is introduced into the amplifier stage of injected pulse YAG laser instrument 2 as seed light; The described remaining wavelength that the seed injected pulse YAG laser instrument 1 that is introduced into is produced with the amplifier stage of pulsed YAG laser device 2 is that the light of 1064nm amplifies; The two-beam that frequency multiplication that the light of the 1064nm that pulsed YAG laser device 2 amplifier stages produce itself has through this laser instrument and beam splitting arrangement output wavelength are respectively 1064nm and 532nm, wherein, the light of 532nm is as the three beams output beam; The light of the 1064nm of pulsed YAG laser device 2 amplifier stages output produces the two-beam that wavelength is respectively 1064nm and 532nm again through a frequency-doubling crystal again, and wherein, the light of 532nm is as the 4th bundle output beam; Control the flashlamp and the Q-switch of seed injected pulse YAG laser instrument 1 and seed injected pulse YAG laser instrument 2 respectively with the pulse signal of the pulse generation of high precision four-way and four passages generations of delayer, the flashlamp of every laser instrument and the time delay between the Q-switch and pulse width are controlled according to the performance parameter of laser instrument is strict by the respective channel of pulse generation of high precision four-way and delayer, and two laser instruments are synchronously worked; The pulse signal that four passages of high precision pulse generation and delayer produce is strict to be kept synchronously, and the four bundle output beams that two laser instruments are produced have constant phasic difference; The polarization state that guarantees every Laser Output Beam is vertical polarization, guarantee each Shu Guang after reflection polarization state do not change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710123314A CN100580538C (en) | 2007-06-22 | 2007-06-22 | Method for obtaining four bundles of pulse coherent light by two pulse lasers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710123314A CN100580538C (en) | 2007-06-22 | 2007-06-22 | Method for obtaining four bundles of pulse coherent light by two pulse lasers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101329489A CN101329489A (en) | 2008-12-24 |
| CN100580538C true CN100580538C (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710123314A Expired - Fee Related CN100580538C (en) | 2007-06-22 | 2007-06-22 | Method for obtaining four bundles of pulse coherent light by two pulse lasers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100580538C (en) |
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2007
- 2007-06-22 CN CN200710123314A patent/CN100580538C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101329489A (en) | 2008-12-24 |
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Granted publication date: 20100113 Termination date: 20110622 |