CN102347587B - Stimulated Brillouin scattering generation method - Google Patents
Stimulated Brillouin scattering generation method Download PDFInfo
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- CN102347587B CN102347587B CN 201010242638 CN201010242638A CN102347587B CN 102347587 B CN102347587 B CN 102347587B CN 201010242638 CN201010242638 CN 201010242638 CN 201010242638 A CN201010242638 A CN 201010242638A CN 102347587 B CN102347587 B CN 102347587B
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- stimulated brillouin
- rotatable mirror
- brillouin scattering
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Abstract
The invention discloses a stimulated Brillouin scattering generation apparatus by utilizing pulse solid laser and a method thereof. The apparatus comprises a seed laser source divided into two paths. Two seed laser go through a pulse solid state laser respectively to generate pulse emitting laser beams. After reflection deflection by a rotatable reflector (7), a second pulse emitting laser beam (10) is emitted into a stimulated Brillouin medium (8) in a mode of intersecting with a first pulse emitting laser beam (9), and time of the second pulse emitting laser beam (10) to reach an intersection point is earlier than time of the first pulse emitting laser beam (9) to reach the intersection point, wherein, time difference between the second pulse emitting laser beam (10) and the first pulse emitting laser beam (9) is less than or equals to a phonon lifetime of the stimulated Brillouin medium (8).
Description
Technical field
The present invention relates to a kind of stimulated Brillouin scattering generating means and method, particularly a kind of easy to use, more the stimulated Brillouin scattering generating means and the method for macro-energy take place more easily.
Background technology
The optics stimulated Brillouin scattering is applied to many aspects; For example analyze the characteristic of stimulated Brillouin scattering medium; Be used to produce light signal amplification etc.,, use continuous wave laser in the middle of the prior art in order to obtain bigger stimulated Brillouin scattering signal; The laser that continuous wave laser is sent is divided into two bundles; Wherein a branch of stimulated Brillouin scattering medium of directly injecting is used to produce the stimulated Brillouin scattering signal, and devices such as a branch of in addition then process speculum are also injected in the middle of the medium, and the excited Brillouin signal that the first bundle laser is produced amplifies.But the excited Brillouin signal that is to use this technology to produce is still big inadequately in some cases, and people thirst in the middle of medium, producing bigger excited Brillouin signal, and the present invention designs with regard to being based on this needs.
Summary of the invention
It is simple to the purpose of this invention is to provide a kind of use, can produce than conventional apparatus and the method device and method of the stimulated Brillouin scattering signal of macro-energy more.
The inventive system comprises a seed laser source (1); The seed laser source is the continuous laser source; The light in seed laser source through 50/50 beam splitter (2) afterwards; Be divided into the two-way seed laser; First via seed laser injects first pulsed solid stale laser (4) afterwards through constant laser delay line components (3); Thereby produce the first pulse outgoing laser beam (9), the first pulse outgoing beam is injected stimulated Brillouin scattering medium (8) through scalable laser delay line components (12), and the second road seed laser is through speculum (5) reflection injection second pulsed solid stale laser (6); Produce the second pulse outgoing laser beam (10); This second pulse outgoing laser beam (10) is through injecting excited Brillouin medium (8) with the mode that in the excited Brillouin medium, intersects with the first pulse outgoing laser beam (9) after rotatable mirror (7) reflection deflection, and satisfying time that the second pulse outgoing laser beam (10) arrives joining, can not arrive time of joining than the first pulse outgoing laser beam (9) not Zao, and wherein the time difference between second outgoing laser beam (10) and first outgoing laser beam (9) is less than or equal to the phonon lifetime of stimulated Brillouin scattering medium (8).
As everyone knows, pulse laser has the energy peak bigger than continuous laser, and the middle laser of apparatus of the present invention adopts pulse laser not only can improve the laser that produces stimulated Brillouin scattering but also can improve the laser energy peak value that amplifies the stimulated Brillouin scattering signal; Secondly; Adopt a seed laser in the middle of the present invention; This seed laser is injected respectively in the middle of two pulsed solid stale lasers; Thereby can produce frequency, the identical pulse laser of phase place can guarantee that at the energy that improves two bundle laser two restraint the coherence of laser simultaneously again; The time difference that makes two bundle laser reach medium through scalable laser delay line components at last was controlled at below the phonon lifetime of stimulated Brillouin scattering medium, thereby had guaranteed under the use pulse laser, also can effectively amplify the stimulated Brillouin scattering signal.
Rotatable mirror wherein can be one also can be two; If one; Can regulate two laser (9) and (10) crossing position through rotating this speculum; Thereby can realize the flexibility of stimulated scattering medium placement location, particularly all be not easy to change the situation of position, thereby can regulate the generation of rotatable mirror simple realization stimulated Brillouin scattering this moment for laser and stimulated scattering medium.
Under preferred situation, use two rotatable mirrors (7) and (11), in this case; Through regulating two rotatable mirrors, not only can regulate the position that two bundle laser beams intersect, can regulate the angle between the two laser simultaneously; Have under the long-pending prerequisite of same cross-sectional at laser beam; The angle of two bundle laser beams is more little, and the distance that two laser overlaps is just big more, thereby can further amplify the stimulated Brillouin scattering signal of generation.Wherein the angle of two bundle laser beams is less than 10 degree, preferably less than 5 degree.
Description of drawings
Accompanying drawing 1 has provided the embodiment that device of the present invention has a rotatable mirror.
Accompanying drawing 2 has provided the embodiment that device of the present invention has two rotatable mirrors.
Accompanying drawing 3 has provided the variation that rotatable mirror is in angle between the diverse location place two pulse outgoing laser beams.
Embodiment
Embodiment 1:
Shown in accompanying drawing 1, this stimulated Brillouin scattering generating means comprises: seed laser source (1), 50/50 beam splitter (2); Constant laser delay line components (3), first pulsed solid stale laser (4), speculum (5); Second pulsed solid stale laser (6); Rotatable mirror (7), stimulated Brillouin scattering medium (8), scalable laser delay line components (12).
Seed laser source (1) is the continuous laser source; Produce the seed laser source; The light in seed laser source through 50/50 beam splitter (2) afterwards; Be divided into the two-way seed laser; First via seed laser injects first pulsed solid stale laser (4) afterwards through constant laser delay line components (3); Thereby produce the first pulse outgoing laser beam (9); The first pulse outgoing laser beam is injected stimulated Brillouin scattering medium (8) through scalable laser delay line components (12); The second road seed laser process speculum (5) reflects and injects second pulsed solid stale laser (6), produces the second pulse outgoing laser beam (10), and this second pulse outgoing laser beam (10) reflects deflection afterwards to inject excited Brillouin medium (8) with the first pulse outgoing laser beam (9) crossing mode in the excited Brillouin medium through rotatable mirror (7); And it is late in the time of the first pulse outgoing laser beam (9) arrival joining to satisfy the second pulse outgoing laser beam (10) arrival joining; Wherein the time difference of second outgoing laser beam (10) and first outgoing laser beam (9) arrival joining is less than or equal to the phonon lifetime of stimulated Brillouin scattering medium (8), and the effect of wherein constant laser delay line components (3) is that compensation first via seed laser is leading with respect to the optics of the second road seed laser, gets into two pulsed solid stale lasers simultaneously to guarantee the two-way seed laser; Make two pulsed solid stale lasers while starting oscillations produce laser simultaneously, scalable laser delay line components (12) then is used to produce the time difference that two beam pulse outgoing laser beams arrive joining.Can realize the generation of the stimulated Brillouin scattering of diverse location place medium through the angle of regulating rotatable mirror (7).
Embodiment 2:
Shown in accompanying drawing 2, this stimulated Brillouin scattering generating means comprises: seed laser source (1), 50/50 beam splitter (2); Constant laser delay line components (3), first pulsed solid stale laser (4), speculum (5); Second pulsed solid stale laser (6), first rotatable mirror (7), second rotatable mirror (11); Stimulated Brillouin scattering medium (8), scalable laser delay line components (12).
Seed laser source (1) is the continuous laser source; Produce the seed laser source; The light in seed laser source through 50/50 beam splitter (2) afterwards; Be divided into the two-way seed laser; First via seed laser injects first pulsed solid stale laser (4) afterwards through constant laser delay line components (3); Thereby produce the first pulse outgoing laser beam (9); The first pulse outgoing laser beam is injected stimulated Brillouin scattering medium (8) through scalable laser delay line components (12); Second pulsed solid stale laser (6) is injected in the second road seed laser process speculum (5) reflection, produces the second pulse outgoing laser beam (10), and this second pulse outgoing laser beam (10) reflects deflection afterwards to inject excited Brillouin medium (8) with the first pulse outgoing laser beam (9) crossing mode in the excited Brillouin medium through first rotatable mirror (7) and second rotatable mirror (11); And it is late in the time of the first pulse outgoing laser beam (9) arrival joining to satisfy the second pulse outgoing laser beam (10) arrival joining; Wherein the time difference of second outgoing laser beam (10) and first outgoing laser beam (9) arrival joining is less than or equal to the phonon lifetime of stimulated Brillouin scattering medium (8), and the effect of wherein constant laser delay line components (3) is that compensation first via seed laser is leading with respect to the optics of the second road seed laser, gets into two pulsed solid stale lasers simultaneously to guarantee the two-way seed laser; Make two solid state lasers while starting oscillations produce laser simultaneously, scalable laser delay line components (12) then is used to produce the time difference that two beam pulse outgoing laser beams arrive joining.
Wherein second rotatable mirror is installed on the guide rail, through this guide rail, preferably can use the stepping motor with guide rail; Second rotatable mirror can vertically move along guide rail; Through regulating the lengthwise position of second rotatable mirror, can regulate first pulse laser beam (9) and second pulse laser beam (10) distance between second rotatable mirror (11) position, thereby change the angle between the two beam pulse outgoing laser beams; Make angle between the two be less than or equal to 10; Or even 5 below the degree, thereby increases the crossing distance of two laser beams, and; Through regulating the angle of two rotatable mirrors, can also realize the generation of the stimulated Brillouin scattering of diverse location place medium.
Accompanying drawing 3 changes the angle between the first pulse outgoing laser beam (9) and the second pulse outgoing laser beam (10) with the position that illustrated mode has provided through regulating rotatable mirror (11).Also be rotatable mirror the closer to top, the angle between the two pulse outgoing laser beams is more little.
Claims (9)
1. stimulated Brillouin scattering generating means, it is characterized in that: this device comprises: seed laser source (1), 50/50 beam splitter (2); Constant laser delay line components (3), first pulsed solid stale laser (4), speculum (5); Second pulsed solid stale laser (6); Rotatable mirror, stimulated Brillouin scattering medium (8), scalable laser delay line components (12);
Seed laser source (1) is the continuous laser source; Produce seed laser; Seed laser through 50/50 beam splitter (2) afterwards; Be divided into the two-way seed laser; First via seed laser injects first pulsed solid stale laser (4) afterwards through constant laser delay line components (3); Thereby produce the first pulse outgoing laser beam (9); The first pulse outgoing laser beam is injected stimulated Brillouin scattering medium (8) through scalable laser delay line components (12); The second road seed laser process speculum (5) reflects and injects second pulsed solid stale laser (6), produces the second pulse outgoing laser beam (10), and this second pulse outgoing laser beam (10) reflects deflection afterwards to inject excited Brillouin medium (8) with the first pulse outgoing laser beam (9) crossing mode in the excited Brillouin medium through rotatable mirror; Through regulate scalable laser delay line (12) make the second pulse outgoing laser beam (10) arrive joining it is late arrives time of joining in the first pulse outgoing laser beam (9); Wherein the time difference of the second pulse outgoing laser beam (10) and the first pulse outgoing laser beam (9) arrival joining is less than or equal to the phonon lifetime of stimulated Brillouin scattering medium (8), and the effect of wherein constant laser delay line components (3) is that compensation first via seed laser is leading with respect to the optics of the second road seed laser, gets into two pulsed solid stale lasers simultaneously to guarantee the two-way seed laser; Make said two pulsed solid stale lasers while starting oscillation produce laser simultaneously, can realize the generation of the stimulated Brillouin scattering of diverse location place medium through the angle of regulating rotatable mirror.
2. stimulated Brillouin scattering generating means as claimed in claim 1 is characterized in that: wherein said rotatable mirror has only one.
3. stimulated Brillouin scattering generating means as claimed in claim 1; It is characterized in that: wherein said rotatable mirror has two; Comprise first rotatable mirror (7) and second rotatable mirror (11); Through said first pulse outgoing laser beam (9) of the position change of regulating second rotatable mirror (11) and the distance of the second pulse outgoing laser beam (10) between second rotatable mirror (11) position, thereby realize regulating the angle between the above-mentioned two pulse outgoing laser beams.
4. stimulated Brillouin scattering generating means as claimed in claim 3 is characterized in that: the angle between the wherein said two pulse outgoing laser beams is less than or equal to 10 degree.
5. stimulated Brillouin scattering generating means as claimed in claim 4 is characterized in that: the angle between the wherein said two pulse outgoing laser beams is less than or equal to 5 degree.
6. stimulated Brillouin scattering generating means as claimed in claim 3 is characterized in that: wherein said second rotatable mirror (11) is installed on the guide rail, regulates the position of said second rotatable mirror through this guide rail.
7. stimulated Brillouin scattering generating means as claimed in claim 6 is characterized in that: wherein said guide rail is the guide rail that stepping motor is installed.
8. stimulated Brillouin scattering method for generation; It is characterized in that: this method produces seed laser through continuous seed laser source (1); Seed laser through 50/50 beam splitter (2) afterwards; Be divided into the two-way seed laser; First via seed laser injects first pulsed solid stale laser (4) afterwards through constant laser delay line components (3); Thereby produce the first pulse outgoing laser beam (9); The first pulse outgoing laser beam is injected stimulated Brillouin scattering medium (8) through scalable laser delay line components (12); The second road seed laser process speculum (5) reflects and injects second pulsed solid stale laser (6), produces the second pulse outgoing laser beam (10), and this second pulse outgoing laser beam (10) reflects deflection afterwards to inject excited Brillouin medium (8) with the first pulse outgoing laser beam (9) crossing mode in the excited Brillouin medium through rotatable mirror; Through regulate scalable laser delay line components (12) make the second pulse outgoing laser beam (10) arrive joining it is late arrives time of joining in the first pulse outgoing laser beam (9); Wherein the time difference of the second pulse outgoing laser beam (10) and the first pulse outgoing laser beam (9) arrival joining is less than or equal to the phonon lifetime of stimulated Brillouin scattering medium (8), and it is leading with respect to the optics of the second road seed laser that wherein constant laser delay line components (3) is used to compensate first via seed laser, makes the two-way seed laser inject two pulsed solid stale lasers simultaneously; Thereby realize that two pulsed solid stale lasers while starting oscillations produce laser simultaneously, can realize the generation of the stimulated Brillouin scattering of diverse location place medium through the angle of regulating rotatable mirror (7).
9. stimulated Brillouin scattering method for generation as claimed in claim 8; It is characterized in that; Wherein said rotatable mirror comprises first rotatable mirror (7) and second rotatable mirror (11); Wherein said second rotatable mirror (11) is installed on the guide rail; Regulate the position of second rotatable mirror through this guide rail,, thereby realize regulating the angle between the above-mentioned two pulse outgoing laser beams through said first pulse outgoing laser beam (9) of the position change of regulating second speculum (11) and the distance of the second pulse outgoing laser beam (10) between second rotatable mirror (11) position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010242638 CN102347587B (en) | 2010-08-02 | 2010-08-02 | Stimulated Brillouin scattering generation method |
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|---|---|---|---|
| CN 201010242638 CN102347587B (en) | 2010-08-02 | 2010-08-02 | Stimulated Brillouin scattering generation method |
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| CN102347587A CN102347587A (en) | 2012-02-08 |
| CN102347587B true CN102347587B (en) | 2012-12-12 |
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| CN 201010242638 Expired - Fee Related CN102347587B (en) | 2010-08-02 | 2010-08-02 | Stimulated Brillouin scattering generation method |
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| CN103149771B (en) * | 2013-01-18 | 2016-03-02 | 华北电力大学（保定） | liquid or gas stimulated Brillouin scattering generation container |
| CN107174128B (en) * | 2017-07-03 | 2020-09-04 | 胡刘满 | Automatic milk machine that dashes with sterilizing equipment |
| CN111653928B (en) * | 2020-06-16 | 2021-09-24 | 北京工业大学 | Double-synchronous pumping Raman laser amplification device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5917179A (en) * | 1997-05-12 | 1999-06-29 | California Institute Of Technology | Brillouin opto-electronic oscillators |
| US6850712B1 (en) * | 2000-05-31 | 2005-02-01 | Lucent Technologies Inc. | Optical fiber transmission system with polarization multiplexing to reduce stimulated brillouin scattering |
| IL141903A0 (en) * | 2001-03-08 | 2002-03-10 | Whitedove Business Corp | Optical wavelength converter and modulator |
| CN100356193C (en) * | 2005-09-22 | 2007-12-19 | 哈尔滨工程大学 | Stimulated Brillouin scattering laser radar underwater hidden substance detecting system and method |
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Effective date of registration: 20190125 Address after: 523000 Jinglong Science Park, Liuwu Liu Sha Nan Road, Shijie Town, Dongguan City, Guangdong Province Patentee after: Dongguan Hongda Automation Equipment Technology Co., Address before: No. 696 Fenghe Road, Nanchang, Jiangxi Province, Jiangxi Patentee before: Nanchang Univ. of Aviation |
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Granted publication date: 20121212 Termination date: 20200802 |