CN102269908A - Simulated Brillouin scattering generating device with preposed continuously pumping beam combiner and simulated Brillouin scattering generating method - Google Patents
Simulated Brillouin scattering generating device with preposed continuously pumping beam combiner and simulated Brillouin scattering generating method Download PDFInfo
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- CN102269908A CN102269908A CN2011101931168A CN201110193116A CN102269908A CN 102269908 A CN102269908 A CN 102269908A CN 2011101931168 A CN2011101931168 A CN 2011101931168A CN 201110193116 A CN201110193116 A CN 201110193116A CN 102269908 A CN102269908 A CN 102269908A
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Abstract
The invention discloses a simulated Brillouin scattering generating device with a preposed continuously pumping beam combiner and a simulated Brillouin scattering generating method. The simulated Brillouin scattering generating device comprises a pulse seed laser apparatus (1), a beam splitter (2), a beam combiner (3), a laser amplifying medium (4), a light path delay adjusting device (7), a first holophote 10 and a second holophote 11, a laser amplifying medium pumping system (5), a controller 8 and a simulated Brillouin scattering medium 9.
Description
Technical field
The present invention relates to a kind of Brillouin scattering laser aid, belong to photoelectron Detection Techniques field.
Background technology
The technology of utilizing Brillouin scattering to carry out Underwater Target Detection has at present obtained actual application, a problem that ultimate challenge is exactly a detection range in this technical development, as everyone knows, the visible light window of fresh water or seawater is near 532nm, even but use the optical maser wavelength of the laser of this wavelength as the Brillouin scattering undersea detection, because marine site or the lake water quality difference surveyed in the reality, the particularly aggravation of polluting along with environment in recent years, it is poor that present ubiquity various water area water-qualities, the direct influence that water quality inferiority is brought for the laser undersea detection is exactly the transmission range that has had a strong impact on laser, even in the middle of the unpolluted water territory, because WATER AS FLOW MEDIUM still is a bigger numerical value for the laser attenuation coefficient of 532nm comparatively speaking, particularly carry out the device of various detections for the scattered light that utilizes stimulated Brillouin scattering, in order to reach long detection range, just need powerful laser instrument, but powerful laser not only needs high cost, its maintenance, use needed in every respect expense all very high, big more general each the big volume that all can have of the output power that a more disadvantageous aspect is exactly a laser instrument, and the laser instrument of large volume is worthless for the application in some fields, because in some applications, there is not so big space to come the laser instrument of ccontaining large volume, and for some devices of surveying on moving target, large volume is obviously worthless especially.In order to obtain longer excited Brillouin detection range not increasing volume or increasing on the basis of small size very, various solutions have been proposed respectively in the prior art.Wherein a kind of technical scheme is exactly to utilize a branch of in addition laser with same frequency and identical polarization state that the passback stimulated Brillouin scattering light that produces is amplified, also promptly the stimulated Brillouin scattering light that produces being carried out secondary is excited to amplify, to improve the light intensity of the stimulated Brillouin scattering light that returns, thereby the sensor that guarantees receiving end can receive enough stimulated Brillouin scattering light signals to analyze the required probing medium information that obtains on this basis, at present in the configuration of laser that is used to amplify and stimulated Brillouin scattering light light path, there is dual mode, a kind of mode is that the two-way light beam is intersected, and another mode then is the two-way beam path to be overlapped be provided with.Accompanying drawing 1 and accompanying drawing 2 are shown all belongs to situation arranged in a crossed manner, wherein utilize two catoptrons 102 and 103 that beam of laser 101 is divided into two bundles in the accompanying drawing 1, and then the two bundle laser that will separate intersect in stimulated Brillouin scattering medium 104, so that the stimulated Brillouin scattering light that produces is amplified, in the middle of this device, owing to be that the beam of laser bundle has been divided into two bundles, so this two bundles laser is duplicate on frequency and polarization state, this device construction is simple, but there are two problems, a problem is owing to be for two bundles with beam of laser bundle branch, so it is not very high must causing the energy of two bundle laser beam, second problem is owing to be to use crossing mode, so just cause the The interaction distance of two-beam very short, causes utilizing of laser beam insufficient.Accompanying drawing 2 shows another mode that is provided with that intersects, in order to improve the beam of laser bundle is divided into two bundles and the problem that causes each energy all to diminish, the light beam that has proposed to use two laser instruments 201 to send intersects by catoptron 202 and incides stimulated Brillouin scattering medium 203, wherein each all is an independently laser instrument, so energy just can not diminish yet, in order to guarantee that laser that two laser instruments send is in identical generation to guarantee to be excited to amplify in nature, need to use same seed laser to be injected into respectively in two laser instruments, like this, though this system has solved the problem that laser beam energy diminishes, this device still can not solve the short problem of The interaction distance.In order to solve the short problem of The interaction distance, the best way is that the light path of two bundle laser beam is carried out overlapping setting, disclose as disclosed Chinese patent application CN101266342A in being provided with in that existing light path is overlapping, in order to realize two pulse laser beams with on coincidence to a light path that the time difference (this is to produce the secondary excited Brillouin to amplify needed) arranged, this device utilizes photoelectric crystal that the different laser beam of two bundle polarization states is controlled, thereby guarantee and two bundle of pulsed laser can be coupled on the light path in the mode that the time difference is arranged, and has identical polarization state in the time of can also guaranteeing to reach the stimulated Brillouin scattering medium, need to use simultaneously polarization coupled mirror and electro-optic crystal to realize the polarization states control of front and back two bundle laser in this device, complex structure not only, simultaneously very high for the requirement of electro-optic crystal, but also be accompanied by following problem, employed two bundle laser beam or be that beam of laser is divided into two bundles in this device, will cause diminishing of two bundle laser energies like this, if the two-way laser beam of using two laser instruments to produce, though kept energy intensity not diminish, but owing to use two laser instruments then can take more space accordingly, because two laser instruments obviously need occupy many one times space, and space problem is indeterminable under many circumstances or it is very difficult to solve, or will cause increasing sharply of cost.
Summary of the invention
The present invention puts forward in order to solve above-mentioned technical matters, can realize that not only the identical laser beam of two-way character has the light path of the time difference and overlaps, but also that volume that can implement device does not significantly become is big, the time difference wherein can be regulated, the adjusting of its time difference can be provided with according to the optimization that stimulated Brillouin scattering is amplified, certainly, if with said apparatus be used for other need character is identical the two-way laser beam have the light path of the time difference and overlap, the time difference is so wherein just regulated according to the actual needs, also promptly this device not only can be used for the application that excited Brillouin amplifies, and can also be applied in the system of similar this type of device of needs equally.
In order to solve above-mentioned technical matters, stimulated Brillouin scattering device of the present invention comprises: pulse seed laser instrument (1), beam splitter (2), light combination mirror (3), laser amplification medium (4), optical path delayed device (7), first completely reflecting mirror 10 and second completely reflecting mirror 11, laser amplification medium pumping system (5), controller 8 and stimulated Brillouin scattering medium 9.
Pulse seed laser instrument (1) sends pulse seed laser, this pulse seed Laser Transmission is to beam splitter 2, be divided into two bundles then, wherein the first bundle seed laser continues to propagate forward arrival light combination mirror 3 along original direction, pass and incide the laser amplification medium 4 that is positioned at after the light combination mirror 3 after the light combination mirror 3, the second bundle seed laser then is reflected and is transferred to first completely reflecting mirror 10, incided optical path delayed device 7 after 10 reflections of first completely reflecting mirror, incide on the light combination mirror 3 afterwards via 11 reflections of second completely reflecting mirror after passing this delay regulating device, light combination mirror 3 reflects this light beam in the mode that overlaps with the first bundle seed laser beam optical path, make it to incide laser amplification medium 4, wherein optical path delayed device 7 is by controller 8 controls, by controller 8 is set time delay, controller 8 is being controlled the pumping system 5 of laser amplification medium 4 simultaneously.Optical path delayed device 7 is used to regulate the mistiming of first laser beam and second laser beam arrival light combination mirror 3, above-mentioned two-way laser beam is injected in the laser amplification medium 4 with the light path that overlaps after penetrating light combination mirror 3, then incides the stimulated Brillouin scattering that stimulated Brillouin scattering medium 9 is used to produce amplification through the laser beam after amplifying.Controller 8 is being controlled pumping system 5, pumping system arrives excited state with the laser amplification medium pumping when laser beam is passed through laser amplification medium, controller 8 can guarantee that pumping system 5 is just in running order before the pulse seed Laser emission goes out pulse seed laser, and pumping system keeps continual work in whole process.
Description of drawings
Accompanying drawing 1 is in the prior art beam of laser bundle to be divided into two to restraint back system arranged in a crossed manner in the stimulated Brillouin scattering medium;
Accompanying drawing 2 is in the prior art that two bundle natures are the identical laser beam of being sent by two laser instruments systems arranged in a crossed manner in the stimulated Brillouin scattering medium;
Accompanying drawing 3 is first embodiment that laser beam among the present invention that two-way character is identical has the stimulated Brillouin scattering that the light path of the time difference overlaps.
Accompanying drawing 4 is second embodiment that laser beam among the present invention that two-way character is identical has the stimulated Brillouin scattering that the light path of the time difference overlaps
In accompanying drawing 3,1 expression seed laser, 2 expression beam splitters, 3 expression light combination mirrors, 4 expression laser amplification mediums, the optical path delayed device of 7 expressions, the pumping system of 5 expression laser amplification mediums, the 8th, controller, the 9th, the stimulated Brillouin scattering medium, 10 and 11 represent first and second completely reflecting mirrors respectively.
Embodiment
Below in conjunction with accompanying drawing 3 first embodiment of the present invention is described, seed laser (1) sends seed laser, this seed laser is transferred to beam splitter 2, be divided into two bundles then, wherein the first bundle seed laser continues to propagate forward arrival light combination mirror 3 along original direction, pass and incide the laser amplification medium 4 that is positioned at after the light combination mirror 3 after the light combination mirror 3, the second bundle seed laser then is reflected and is transferred to first completely reflecting mirror 10, incided optical path delayed device 7 after 10 reflections of first completely reflecting mirror, incide on the light combination mirror 3 afterwards via 11 reflections of second completely reflecting mirror after passing this delay regulating device, light combination mirror 3 reflects this light beam in the mode that overlaps with the first bundle seed laser beam optical path, make it to incide laser amplification medium 4, wherein optical path delayed device 7 is by controller 8 controls, by controller 8 is set time delay, controller 8 is being controlled the pumping system 5 of laser amplification medium 4 simultaneously.Optical path delayed device 7 is used to regulate the mistiming of first laser beam and second laser beam arrival light combination mirror 3, above-mentioned two-way laser beam is injected in the laser amplification medium 4 with the light path that overlaps after penetrating light combination mirror 3, then incides the stimulated Brillouin scattering that stimulated Brillouin scattering medium 9 is used to produce amplification through the laser beam after amplifying.Controller 8 is being controlled pumping system 5, pumping system arrives excited state with the laser amplification medium pumping when laser beam is passed through laser amplification medium, controller 8 can guarantee that pumping system 5 is just in running order before the pulse seed Laser emission goes out pulse seed laser, and pumping system keeps continual work in whole process.Could guarantee like this can also realize the amplification of restrainting laser after by laser amplification medium to second at the first bundle laser, carry out just can be implemented in the identical two bundle laser of front and back character of realizing having the mistiming in the laser instrument after such setting, thereby can realize the stimulated Brillouin scattering of amplifying.If laser amplification medium is in for a long time by pump state, so just may be owing to dispelling the heat untimely or the too much damage that causes laser amplification medium of thermal accumlation, in order to prevent the damage of laser amplification medium, in this device busy process, each two bundle seed laser bundles that amplify just stop the regular hour afterwards, to realize the needs of heat radiation.
In use, at first the pump light that sent by first pumping system of the first seed laser bundle by laser amplification medium carries out pumping and amplifies, laser beam after obtaining amplifying, the generation that this laser beam incident is used to produce stimulated Brillouin scattering in the stimulated Brillouin scattering medium, because controller 8 is being controlled pumping system, pumping system just arrives excited state with the laser amplification medium pumping before seed laser passes laser amplification medium, can be exaggerated when having guaranteed the first bundle seed light through amplification medium, though the first bundle seed laser is through being induced to ground state with the excited state of part laser amplification medium afterwards, but because pumping system is in running order always, also be that atom or the molecule that pumping system can will be got back to ground state at once remotivates excited state to amplify the second bundle seed laser through postponing, after this amplification second bundle laser beam incident amplifies with the excited Brillouin flashlight that laser was produced after first bundle is amplified to the stimulated Brillouin scattering medium.But the pumping laser amplification medium can cause the laser amplification medium heat radiation untimely continuously for a long time, thereby cause the damage of laser amplification medium, so after each amplification two bundle seed lasers, need pumping system to stop a period of time, to realize the needs of heat radiation.
Carry out just can be implemented in the identical two bundle laser of front and back character of realizing having the mistiming in the laser instrument after such setting, thereby can realize the stimulated Brillouin scattering of amplifying, in this system, the light paths of front and back two bundle laser overlap fully, so just guarantee to have had maximum excited Brillouin phase mutual edge distance, only need a laser instrument just can realize simultaneously, not only do not reduce the energy of each Shu Jiguang, also reached the purpose that does not increase volume.Because beam splitter and light combination mirror have placed before the laser amplification medium, though the energy of two bundle seed lasers of arrival laser amplification medium is all little, but with respect to the laser beam energy after the laser amplification medium, the energy of this some loss can be ignored fully, because the laser energy of final output is determined by laser amplification medium, rather than is determined by the seed light energy size of institute's incident.
Simultaneously, owing to be provided with optical path delayed device 7, the time difference before and after can regulating arbitrarily between the two bundle laser beam, for example can regulate this mistiming according to the maximization of stimulated Brillouin scattering light, simultaneously, so just can this system applies in various environment, and not merely be applied to stimulated Brillouin scattering, the mistimings before and after then only need regulating according to the application need of reality between the two bundle laser get final product.
Accompanying drawing 4 has provided the second embodiment of the present invention, this embodiment and the above embodiments difference only are: include first laser amplification medium 4 and second laser amplification medium 13 in this embodiment, wherein first laser amplification medium 4 has first pumping system 5, form first amplification system thus, second laser amplification medium 13 has second pumping system 6, form second amplification system thus, controller 8 is being controlled first pumping system 5 and second pumping system 6 simultaneously, wherein in this device work, first amplification system and the second amplification system alternate turns are worked.
The front illustrates, because the laser amplification medium among first embodiment is because the needs of heat radiation can not always be in pump state, so after each amplification two bundle seed lasers, just need to interrupt a period of time, because the appearance of this break period has just caused this device to use the reduction of going up occurrence frequency, but the device for second embodiment then can significantly improve the frequency that stimulated Brillouin scattering takes place, in two laser amplifier systems among this embodiment each all with first embodiment in the same, these two laser amplifier system one after the other work, such as, amplify with laser amplification medium 4 and the pumping system 5 corresponding earlier the needed front and back two bundle seed lasers with time difference of stimulated Brillouin scattering take place for the first time with it, when carrying out stimulated Brillouin scattering generation next time, just use laser amplification medium 13 and pumping system 6 to amplify this time needed front and back two bundle seed lasers with time difference, re-use laser amplification medium 4 and the pumping system 5 corresponding more next time the time with it, the use that replaces like this can also can not reduce the occurrence frequency of stimulated Brillouin scattering simultaneously so that each amplification medium can obtain the sufficient heat radiation time.
Claims (4)
1. stimulated Brillouin scattering generating means, comprise: pulse seed laser instrument (1), beam splitter (2), light combination mirror (3), laser amplification medium (4), optical path delayed regulating device (7), first completely reflecting mirror (10) and second completely reflecting mirror (11), laser amplification medium pumping system (5), controller (8) and stimulated Brillouin scattering medium (9);
Pulse seed laser instrument (1) sends pulse seed laser, this pulse seed Laser Transmission is to beam splitter (2), be divided into two bundles then, wherein the first bundle seed laser continues to propagate forward arrival light combination mirror (3) along original direction, passing light combination mirror (3) incides afterwards and is positioned at light combination mirror (3) laser amplification medium (4) afterwards, the second bundle seed laser then is reflected and is transferred to first completely reflecting mirror (10), incided optical path delayed device (7) after first completely reflecting mirror (10) reflection, incide on the light combination mirror (3) afterwards via second completely reflecting mirror (11) reflection after passing this delay regulating device, light combination mirror (3) reflects this light beam in the mode that overlaps with the first bundle seed laser beam optical path, make it to incide laser amplification medium (4), wherein optical path delayed device (7) is controlled by controller (8), by controller (8) is set time delay, controller (8) is being controlled the pumping system (5) of laser amplification medium (4) simultaneously; Optical path delayed device (7) is used to regulate the mistiming of first laser beam and second laser beam arrival light combination mirror (3), above-mentioned two-way seed laser bundle is injected in the laser amplification medium (4) with the light path that overlaps after penetrating light combination mirror 3, then incide stimulated Brillouin scattering medium (9) through the laser beam after amplifying and be used to produce the stimulated Brillouin scattering of amplification, controller (8) is being controlled pumping system (5), pumping system arrives excited state with the laser amplification medium pumping when laser beam is passed through laser amplification medium, controller (8) can guarantee that pumping system before the pulse seed laser instrument is launched pulse seed laser (5) is just in running order, and pass at two bundles that pumping system keeps continual work in the process of laser amplification medium before and after the seed lasers, pumping system just stops certain hour after two bundle seed lasers are amplified, and amplifies up to carrying out next round.
2. stimulated Brillouin scattering generating means according to claim 1, amplification medium wherein and pumping system respectively comprise two, form two laser amplifier systems, these two laser amplifier system one after the other work.
3. stimulated Brillouin scattering method for generation, pulse seed laser instrument (1) sends pulse seed laser, this pulse seed Laser Transmission is to beam splitter (2), be divided into two bundles then, wherein the first bundle seed laser continues to propagate forward arrival light combination mirror (3) along original direction, passing light combination mirror (3) incides afterwards and is positioned at light combination mirror (3) laser amplification medium (4) afterwards, the second bundle seed laser then is reflected and is transferred to first completely reflecting mirror (10), incided optical path delayed device (7) after first completely reflecting mirror (10) reflection, incide on the light combination mirror (3) afterwards via second completely reflecting mirror (11) reflection after passing this delay regulating device, light combination mirror (3) reflects this light beam in the mode that overlaps with the first bundle seed laser beam optical path, make it to incide laser amplification medium (4), wherein optical path delayed device (7) is controlled by controller (8), by controller (8) is set time delay, controller (8) is being controlled the pumping system (5) of laser amplification medium (4) simultaneously; Optical path delayed device 7 is used to regulate the mistiming of the first bundle seed laser and the second bundle seed laser arrival light combination mirror (3), two above-mentioned bundle seed lasers are injected in the laser amplification medium (4) with the light path that overlaps afterwards at ejaculation light combination mirror (3), then incide stimulated Brillouin scattering medium (9) through the laser beam after amplifying and are used to produce the stimulated Brillouin scattering of amplification; Controller (8) is being controlled pumping system (5), pumping system arrives excited state with the laser amplification medium pumping when laser beam is passed through laser amplification medium, controller (8) can guarantee that pumping system before the pulse seed Laser emission goes out pulse seed laser (5) is just in running order, and pass at two bundles that pumping system keeps continual work in the process of laser amplification medium before and after the seed lasers, pumping system just stops certain hour after two bundle seed lasers are amplified, and amplifies up to carrying out next round.
4. stimulated Brillouin scattering method for generation according to claim 3, amplification medium wherein and pumping system respectively comprise two, form two laser amplifier systems, these two laser amplifier system one after the other work.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825190A (en) * | 2014-03-13 | 2014-05-28 | 哈尔滨工业大学 | Method and device for outputting high-energy fundamental mode laser in large-core-diameter optical fibre based on stimulated Brillouin scattering technology |
| CN105353575A (en) * | 2015-12-10 | 2016-02-24 | 华北电力大学（保定） | Stimulated Brillouin scattering device with high-efficiency pulse laser |
| CN106052551A (en) * | 2016-04-29 | 2016-10-26 | 合肥工业大学 | Reflective blazed grating-based Sagnac interference element |
| CN107101946A (en) * | 2017-06-28 | 2017-08-29 | 哈尔滨工业大学 | The homologous laser pump (ing) detection device of light delay with probe optical pulse compress technique |
| CN110031128A (en) * | 2019-05-20 | 2019-07-19 | 威海怡和专用设备制造有限公司 | One kind is from difference frequency stimulated Brillouin scattering temperature measurement method |
| CN110174664A (en) * | 2019-05-31 | 2019-08-27 | 深圳市速腾聚创科技有限公司 | The determination method of laser radar system and laser radar echo signal |
| CN110867721A (en) * | 2019-12-02 | 2020-03-06 | 中国科学院合肥物质科学研究院 | Laser device |
| CN112740066A (en) * | 2019-05-31 | 2021-04-30 | 深圳市速腾聚创科技有限公司 | Anti-interference processing method and device for multi-pulse laser radar system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040136052A1 (en) * | 2003-01-15 | 2004-07-15 | Hunt Jeffrey H. | Stimulated brillouin scattering optical amplifier |
| CN101266342B (en) * | 2007-08-08 | 2010-12-29 | 北京师范大学 | Polarization state for controlling two bundle of pulsed laser by out-cavity electro-optical polarization controller |
-
2011
- 2011-07-12 CN CN 201110193116 patent/CN102269908B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040136052A1 (en) * | 2003-01-15 | 2004-07-15 | Hunt Jeffrey H. | Stimulated brillouin scattering optical amplifier |
| CN101266342B (en) * | 2007-08-08 | 2010-12-29 | 北京师范大学 | Polarization state for controlling two bundle of pulsed laser by out-cavity electro-optical polarization controller |
Non-Patent Citations (1)
| Title |
|---|
| 陈旭东等: "同轴正交偏振双脉冲序列受激布里渊散射抽运放大的实现方法", 《物理学报》 * |
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| CN103825190A (en) * | 2014-03-13 | 2014-05-28 | 哈尔滨工业大学 | Method and device for outputting high-energy fundamental mode laser in large-core-diameter optical fibre based on stimulated Brillouin scattering technology |
| CN103825190B (en) * | 2014-03-13 | 2017-03-01 | 哈尔滨工业大学 | The method and device of high-energy basic mode laser is exported based on stimulated Brillouin scattering technology in large core fiber |
| CN105353575B (en) * | 2015-12-10 | 2018-05-29 | 华北电力大学（保定） | The efficient stimulated Brillouin scattering device of pulse laser |
| CN105353575A (en) * | 2015-12-10 | 2016-02-24 | 华北电力大学（保定） | Stimulated Brillouin scattering device with high-efficiency pulse laser |
| CN106052551B (en) * | 2016-04-29 | 2019-04-23 | 合肥工业大学 | A kind of Sagnac interference element based on reflective balzed grating, |
| CN106052551A (en) * | 2016-04-29 | 2016-10-26 | 合肥工业大学 | Reflective blazed grating-based Sagnac interference element |
| CN107101946A (en) * | 2017-06-28 | 2017-08-29 | 哈尔滨工业大学 | The homologous laser pump (ing) detection device of light delay with probe optical pulse compress technique |
| CN107101946B (en) * | 2017-06-28 | 2019-11-15 | 哈尔滨工业大学 | The homologous laser pump (ing) detection device of light delay with probe optical pulse compress technique |
| CN110031128A (en) * | 2019-05-20 | 2019-07-19 | 威海怡和专用设备制造有限公司 | One kind is from difference frequency stimulated Brillouin scattering temperature measurement method |
| CN110031128B (en) * | 2019-05-20 | 2021-01-12 | 威海怡和专用设备制造有限公司 | Self-difference frequency stimulated Brillouin scattering water temperature measuring method |
| CN110174664A (en) * | 2019-05-31 | 2019-08-27 | 深圳市速腾聚创科技有限公司 | The determination method of laser radar system and laser radar echo signal |
| CN112740066A (en) * | 2019-05-31 | 2021-04-30 | 深圳市速腾聚创科技有限公司 | Anti-interference processing method and device for multi-pulse laser radar system |
| CN112740066B (en) * | 2019-05-31 | 2023-08-04 | 深圳市速腾聚创科技有限公司 | Anti-interference processing method and device for multi-pulse laser radar system |
| CN110867721A (en) * | 2019-12-02 | 2020-03-06 | 中国科学院合肥物质科学研究院 | Laser device |
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