CN205139546U - Stimulated brillouin scattering container with recess - Google Patents

Abstract

The utility model provides a stimulated brillouin scattering container, this container has two recesses at least on length direction, wherein the recess is the axial symmetry in length direction's axial, contained angle between two bundles of light on requiring to incide the stimulated brillouin scattering container is delta, two bundles of light are an and b respectively in the incident surface department of container and the point of intersect between the container surface, length between an and the b is L1, so before first recess of container length L2 should satisfy (img file='DSA0000122769010000011. TIF'wi='504'he='120' /) wherein H for the height or the diameter of first recess, H is the height or the diameter of a second recess, use this containment structure can produce the stimulated brillouin scattering signal of reinforcing.

Description

The reeded stimulated Brillouin scattering container of a kind of tool

Technical field

The utility model relates to a kind of stimulated Brillouin scattering container, belongs to optical technical field.

Background technology

The stimulated Brillouin scattering device of prior art is generally divided into two kinds, one is flashlight and pump light same light path, another is that flashlight and pump light exist intersecting angle, wherein cut both ways, the two-beam participating in stimulated scattering is incorporated on identical path by the needs of same light path, and generally take two kinds of modes, one utilizes semi-transparent semi-reflecting lens, another uses polarizing beam splitter mirror, but the outstanding problem which kind of situation is brought is all lose more luminous energy.For the situation that there is intersecting angle, then semi-transparent semi-reflecting lens need not be used, do not need to use polarizing beam splitter mirror yet, the loss of luminous energy can not be brought, but its shortcoming is also obvious, that travel path due to two-beam is not overlapping, just intersect on stretch footpath or even on a point, so cause the used apart from short of them, although the energy participating in the two-beam of stimulated scattering is all stronger, but because operating distance is short especially, so the stimulated Brillouin scattering signal produced is usually all more weak.In order to extend operating distance, the way that can expect is exactly the angle reduced between two-beam or the number of times increasing intersection.Increase the number of times intersected and can increase reflecting surface in long container, again intersect after reflection.Conventional stimulated Brillouin scattering container as shown in Figure 1, it is cylindrical or rectangular parallelepiped, for this container, if want to realize larger stimulated Brillouin scattering signal, then need the angle reduced between two-beam, increase the number of times of intersection simultaneously, but, in order to realize above-mentioned 2 points, need the length constantly extending container, because no matter be reduce intersecting angle, or increase the number of times intersected and all need longer distance, this just needs the container more grown to provide this distance, the defect that the length extending container is brought also is obvious, although distance extends a lot of exactly, but the action length of the two-beam of reality increases limited, such as the increase of 50cm container length may just bring increase once crossing, like this, in fact the distance that stimulated Brillouin scattering light is propagated at internal tank also can increase, stimulated scattering light is propagated in this medium can face decay equally, the propagation distance that the enhancing that result increases once the stimulated Brillouin scattering that increase that is crossing or that reduce the stimulated Brillouin scattering operating distance that intersecting angle brings produces often is increased has attenuated, what sometimes even attenuate is more, the stimulated Brillouin scattering of enhancing is not only there is no after this has been doning, obtain stimulated Brillouin scattering signal little all the better, lose more than gain.

Utility model content

The utility model puts forward for the problems referred to above, provide a kind of stimulated Brillouin scattering container and utilize this container to carry out the method for stimulated Brillouin scattering, use stimulated Brillouin scattering container of the present utility model, by the length of balanced, crossover number of times or intersecting angle and container, the problem that stimulated Brillouin scattering light can not be enhanced by force can be solved, thus the stimulated Brillouin scattering light significantly strengthened can be obtained.

For solving the problem, according to an embodiment of the present utility model, provide a kind of stimulated Brillouin scattering container, it is characterized in that: this container at least has two grooves in the longitudinal direction, its further groove is axially axisymmetric at length direction, when requiring that the angle incided between the two-beam on stimulated Brillouin scattering container is δ, the intersection point of two-beam between the plane of incidence place and vessel surface of container is respectively a and b, length between a and b is L1, and the length L2 before first groove of so container should meet wherein H is height or the diameter of first groove, and h is height or the diameter of second groove, uses this structure of container can produce the stimulated Brillouin scattering signal of enhancing.

According to an embodiment of the present utility model, the cross section of described container is rectangle or circle.

According to an embodiment of the present utility model,

According to an embodiment of the present utility model, the whole length L3 of stimulated Brillouin scattering container satisfies condition $L3\≥\frac{L1}{2tg\frac{\mathrm{\δ}}{2}}+\frac{H}{tg\frac{\mathrm{\δ}}{2}}.$

According to an embodiment of the present utility model, provide a kind of method utilizing stimulated Brillouin scattering container to carry out stimulated Brillouin scattering, it is characterized in that, with intersecting angle δ at the incident two bundle pump lights of the incidence end of container.

Accompanying drawing explanation

Accompanying drawing 1 is stimulated Brillouin scattering container schematic diagram of the prior art;

Accompanying drawing 2 be in the utility model use the schematic diagram of stimulated Brillouin scattering container.

Embodiment

Stimulated Brillouin scattering container of the present utility model will be described in detail below on basis by reference to the accompanying drawings.Figure 2 illustrate stimulated Brillouin scattering container of the present utility model, this container at least has two grooves in the longitudinal direction, and axially symmetrical at length direction of groove, in the embodiment that Fig. 2 provides, the quantity of groove is 2.The cross section of container can be known shape, such as rectangle, circular etc.

The relational expression that wherein said stimulated Brillouin scattering container demand fulfillment is following: when requiring that the angle incided between the two-beam on stimulated Brillouin scattering container is δ, the intersection point of two-beam between the plane of incidence place and vessel surface of container is respectively a and b, length between a and b is L1, and so the length sum L2 (being also the length before second groove) of container first paragraph and second segment should meet wherein H is height or the diameter of first groove, h is height or the diameter of second groove, δ is the intersecting angle between two bundle pump lights of participation stimulated Brillouin scattering, by the length before first groove arranging container like this, can ensure to use this structure of container can produce the stimulated Brillouin scattering signal significantly strengthened, because can ensure that the little situation of intersecting angle realize intersecting again of stimulated Brillouin scattering two light beams in short distance like this, simultaneously again can not the travel path of broken beam.

Wherein preferred mode is arranged can ensure like this to realize optimized design under minimum length, also namely can obtain maximum stimulated Brillouin scattering signal with the shortest length.Wherein this length L2 can not be less than if because be less than this length, the vertical chamber wall of groove can impact the propagation of light path, first its impact produced can decay the light intensity of pump light, simultaneously because flashlight and pump light are that same light path is propagated, so intensity and the propagation of stimulated Brillouin scattering flashlight and then must be had influence on.

Further, should satisfy condition for the length L3 that stimulated Brillouin scattering container is whole so just can ensure that two bundle pump lights realize third time in the 3rd section crossing, thus the intensity of stimulated Brillouin scattering flashlight can be maximized.

Be more than illustrating for this utility model, but can not be interpreted as restriction of the present utility model.The distortion of those skilled in the art's precognition is all in protection domain of the present utility model.

Claims (4)

1. a stimulated Brillouin scattering container, it is characterized in that: this container at least has two grooves in the longitudinal direction, its further groove is axially axisymmetric at length direction, when requiring that the angle incided between the two-beam on stimulated Brillouin scattering container is δ, the intersection point of two-beam between the plane of incidence place and vessel surface of container is respectively a and b, length between a and b is L1, and the length L2 before first groove of so container should meet wherein H is height or the diameter of first groove, and h is height or the diameter of second groove, uses this structure of container can produce the stimulated Brillouin scattering signal of enhancing.

2. stimulated Brillouin scattering container as claimed in claim 1, is characterized in that: the cross section of described container is rectangle or circle.

3. stimulated Brillouin scattering container as claimed in claim 1, is characterized in that: $L2=\frac{L1}{2tg\frac{\mathrm{\δ}}{2}}+\frac{H}{2tg\frac{\mathrm{\δ}}{2}}+$ $\frac{H-h}{2tg\frac{\mathrm{\δ}}{2}}.$

4. stimulated Brillouin scattering container as claimed in claim 1, is characterized in that: the whole length L3 of stimulated Brillouin scattering container satisfies condition