CN105242476B - One kind has reeded stimulated Brillouin scattering container and method - Google Patents
One kind has reeded stimulated Brillouin scattering container and method Download PDFInfo
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- CN105242476B CN105242476B CN201510733470.3A CN201510733470A CN105242476B CN 105242476 B CN105242476 B CN 105242476B CN 201510733470 A CN201510733470 A CN 201510733470A CN 105242476 B CN105242476 B CN 105242476B
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- container
- brillouin scattering
- stimulated brillouin
- groove
- length
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
A kind of stimulated Brillouin scattering container, the container at least has two grooves in the longitudinal direction, its further groove is axisymmetric in the axial direction of length direction, when the angle for requiring to incide between the two-beam on stimulated Brillouin scattering container is δ, intersection point of the two-beam at the plane of incidence of container between vessel surface is respectively a and b, length between a and b is L1, then the length L2 before first groove of container should meetWherein H is the height or diameter of first groove, and h is the height or diameter of second groove, and the stimulated Brillouin scattering signal of enhancing can be produced using the structure of container.
Description
Technical field
The present invention relates to a kind of stimulated Brillouin scattering container and the method being scattered using the container, belong to optics skill
Art field.
Background technology
The stimulated Brillouin scattering device of the prior art is generally divided into two kinds, and one kind is flashlight and pump light same light path,
Another is flashlight with pump light there are intersecting angle, wherein cutting both ways, the needs of same light path will participate in stimulated scattering
Two-beam be incorporated on identical path, generally take two ways, one kind is to utilize semi-transparent semi-reflecting lens, another
It is to use polarizing beam splitter mirror, but the outstanding problem which kind of situation is brought all is the more light energy of loss.For existing
The situation of intersecting angle, then need not use semi-transparent semi-reflecting lens, it is not required that using polarizing beam splitter mirror, will not bring the damage of light energy
Lose, but its shortcoming is also apparent, that is, since the propagation path of two-beam is not overlapping, simply on stretch footpath
Intersect even on a point, so causing their distance used short, although participating in the energy of the two-beam of stimulated scattering all
It is stronger, but since operating distance is especially short, so the stimulated Brillouin scattering signal produced is usually all weaker.In order to prolong
Long operating distance, alternatively it is conceivable to method be exactly to reduce angle between two-beam or number that increase intersects.Increase is intersecting
Number can increase reflecting surface in long container, intersect again after reflection.Common stimulated Brillouin scattering container such as Fig. 1 institutes
Show, it is cylinder or cuboid, for this container, if it is desired to realize larger stimulated Brillouin scattering signal, then
Need to reduce the angle between two-beam, while increase the number of intersection, still, in order to realize at above-mentioned 2 points, it is necessary to constantly prolong
The length of long container, because intersecting angle is either reduced, or the number that increase is intersected is required for longer distance, and this is just needed
Longer container is wanted to provide this distance, extends the defects of the length of container is brought and is also apparent, although exactly distance is prolonged
Grow much, but the action length increase of actual two-beam is limited, such as the increase of possible 50cm container lengths is just brought
Increase once intersecting, in this way, actually stimulated Brillouin scattering light can also increase in the distance of container internal communication, is excited to dissipate
Decay can equally be faced in this media by penetrating light, and as a result often increase once intersects or reduces what intersecting angle was brought
The propagation distance decay that the enhancing of stimulated Brillouin scattering caused by the increase of stimulated Brillouin scattering operating distance is increased
Fall, even attenuate sometimes more, not only there is no the stimulated Brillouin scattering of enhancing after so having done, obtain by
Sharp brillouin scattering signal smaller on the contrary, loses more than gain.
The content of the invention
The present invention addresses the above problem puts forward, there is provided a kind of stimulated Brillouin scattering container and utilizes the appearance
The method that device carries out stimulated Brillouin scattering, using the stimulated Brillouin scattering container of the present invention, by balanced, crossover number or
The length of intersecting angle and container, can solve the problems, such as that stimulated Brillouin scattering light cannot be strengthened by force, aobvious so as to obtain
Write the stimulated Brillouin scattering light of enhancing.
A to solve the above problems, embodiment according to the present invention, there is provided a kind of stimulated Brillouin scattering container, it is special
Sign is：The container at least has two grooves in the longitudinal direction, its further groove is axial symmetry in the axial direction of length direction
, when the angle for requiring to incide between the two-beam on stimulated Brillouin scattering container is 6, the plane of incidence of the two-beam in container
Intersection point between place and vessel surface is respectively a and b, and the length between a and b is L1, then from the incident end face of light to second
Length L2 before a groove should meet Wherein H is the height or diameter of first groove, h
For the height or diameter of second groove, the stimulated Brillouin scattering signal of enhancing can be produced using the structure of container.
An embodiment according to the present invention, the rectangular cross-section of the container or circle.
An embodiment according to the present invention,
An embodiment according to the present invention, the whole length L3 of stimulated Brillouin scattering container meet condition
An embodiment according to the present invention, there is provided a kind of to be dissipated using stimulated Brillouin scattering container progress excited Brillouin
The method penetrated, it is characterised in that with intersecting angle 6 container the incident two beam pump lights of incidence end.
Brief description of the drawings
Attached drawing 1 is stimulated Brillouin scattering container schematic diagram of the prior art；
Attached drawing 2 is the schematic diagram of stimulated Brillouin scattering container used in the present invention.
Embodiment
Below will on the basis of with reference to attached drawing detailed description of the present invention stimulated Brillouin scattering container.Attached drawing 2 is shown
The stimulated Brillouin scattering container of the present invention, the container at least have two grooves in the longitudinal direction, and groove is in length side
To axial direction on it is symmetrical, in the embodiment that Fig. 2 is provided, the quantity of groove is 2.The section of container can be known
Shape, such as rectangle, circle etc..
Wherein described stimulated Brillouin scattering container needs to meet following relational expressions：When requiring to incide excited Brillouin
The angle scattered between the two-beam on container is 6, the two-beam intersection point at the plane of incidence of container between vessel surface point
Length not between a and b, a and b is L1, then the sum of length of container first segment and second segment L2 (namely second groove
Length before) it should meetWherein H is the height or diameter of first groove, h second
The height or diameter of a groove, 6, to participate in the intersecting angle between two beam pump lights of stimulated Brillouin scattering, set in this way
Put the length before first groove of container, it is ensured that the excited Brillouin significantly increased can be produced using the structure of container
Scattered signal, because so can realize stimulated Brillouin scattering two-beam in short distance ensureing the small situation of intersecting angle
Beam again intersect (presence for not considering the 3rd section at this time), while again will not broken beam propagation path.
Wherein preferable mode is setIt can so ensure to realize under minimum length
The design of optimization, can also obtain maximum stimulated Brillouin scattering signal with shortest length.Wherein length L2 is not
It can be less thanIf because being less than this length, the vertical chamber wall of groove can cause the propagation of light path
Influencing, its influences produced can decay the light intensity of pump light first, simultaneously because flashlight is same light path propagation with pump light,
So intensity and the propagation of stimulated Brillouin scattering flashlight and then must be influenced.
Further, condition should be met for the whole length L3 of stimulated Brillouin scattering container This
Sample ensures that two beam pump lights realize that third time is intersecting in the 3rd section, so as to maximize stimulated Brillouin scattering letter
The intensity of number light.
Illustrating just for the invention above, but limitation of the present invention can not be interpreted as.This area skill
The deformation of art personnel precognition is in protection scope of the present invention.
Claims (5)
- A kind of 1. stimulated Brillouin scattering container, it is characterised in that：Container along light incident direction set gradually first groove and Second groove, its further groove are axisymmetric in the axial direction of length direction, are held when requiring to incide stimulated Brillouin scattering The angle between two-beam on device is δ, intersection point of the two-beam at the plane of incidence of container between vessel surface be respectively a and Length between b, a and b is L1, from the incident end face of light to second groove before length L2 should meetWherein H is the height or diameter of first groove, and h is the height or diameter of second groove, The stimulated Brillouin scattering signal of enhancing can be produced using the structure of container.
- 2. stimulated Brillouin scattering container as claimed in claim 1, it is characterised in that：The rectangular cross-section of the container or circle Shape.
- 3. stimulated Brillouin scattering container as claimed in claim 1, it is characterised in that：
- 4. stimulated Brillouin scattering container as claimed in claim 1, it is characterised in that：Stimulated Brillouin scattering container is whole Length L3 meets condition
- 5. a kind of method that any stimulated Brillouin scattering container carries out stimulated Brillouin scattering in 1-4 using claim, its Be characterized in that, with intersecting angle δ container the incident two beam pump lights of incidence end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510733470.3A CN105242476B (en) | 2015-10-26 | 2015-10-26 | One kind has reeded stimulated Brillouin scattering container and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510733470.3A CN105242476B (en) | 2015-10-26 | 2015-10-26 | One kind has reeded stimulated Brillouin scattering container and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105242476A CN105242476A (en) | 2016-01-13 |
| CN105242476B true CN105242476B (en) | 2018-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510733470.3A Expired - Fee Related CN105242476B (en) | 2015-10-26 | 2015-10-26 | One kind has reeded stimulated Brillouin scattering container and method |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205139546U (en) * | 2015-10-26 | 2016-04-06 | 华北电力大学（保定） | Stimulated brillouin scattering container with recess |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9503301D0 (en) * | 1995-02-20 | 1995-04-12 | Secr Defence | Laser amplifier |
| CN103149769B (en) * | 2013-01-18 | 2015-08-19 | 华北电力大学（保定） | Brillouin scattering device |
| CN103149770B (en) * | 2013-01-18 | 2016-01-06 | 华北电力大学（保定） | For the container of stimulated Brillouin scattering |
| US9581448B2 (en) * | 2013-04-27 | 2017-02-28 | Magiq Technologies, Inc. | Optical sensors using stimulated brillouin scattering |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205139546U (en) * | 2015-10-26 | 2016-04-06 | 华北电力大学（保定） | Stimulated brillouin scattering container with recess |
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| CN105242476A (en) | 2016-01-13 |
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Granted publication date: 20180511 Termination date: 20181026 |
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| CF01 | Termination of patent right due to non-payment of annual fee |