CN110927984A - Adjustable transverse dislocation laser beam splitting/combining device - Google Patents
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
Abstract
The invention discloses an adjustable transverse dislocation laser beam splitter/combiner, and belongs to the field of optical components and optical instruments. The beam splitting/combining device can realize parallel emergent beam splitting of two paths of linearly polarized light with the same or vertical polarization orientation in a monochromatic or broadband light transverse dislocation manner or coherent beam combining of two paths of linearly polarized parallel light beams with the same or vertical polarization orientation in a transverse dislocation manner. The energy ratio of the two paths of light paths of the beam splitter/combiner can be adjusted at will, and the phase delay between the two paths of light paths can be adjusted at will. In addition, the transverse offset distance between the two optical paths can be adjusted randomly within a certain range. The flexible and adjustable optical beam splitter/combiner has important practical value in the aspects of optical coherent detection, optical holography, complex polarized light field control and the like.
Description
Technical Field
The invention relates to a novel optical beam splitting/combining device, in particular to an adjustable transverse dislocation laser beam splitting/combining device, belonging to the technical field of optical elements and optical instruments.
Background
Optical beam splitters are an important basic optical component. The optical beam splitter generally realizes partial light energy reflection and partial light energy transmission by plating a specially designed film layer on the interface of a glass substrate. The propagation directions of two beams of light after beam splitting of a general optical beam splitter, such as a typical stereo beam splitter prism, are perpendicular to each other, and the splitting ratio of the general optical beam splitter is fixed and not adjustable. In addition, polarization-independent or polarization beam splitting can be realized through the sub-wavelength artificial microstructure, and two beams of light form a certain included angle after beam splitting. The typical structure is a sub-wavelength grating that can achieve very high efficiency of 1 × 2 splitting in littrow conditions, however, this structure generally uses its 0 th order and-1 st order, so that 0 th order has no dispersion and-1 st order has strong dispersion for broadband light, and thus it is difficult to achieve broadband 1 × 2 splitting. In addition, the beam splitter has a fixed structure, and the splitting ratio of the beam splitter is also fixed.
Optical beam splitting/combining is a fundamental and core technology of many optical technologies, including optical holography, optical coherence measurement/detection, generation and regulation of complex polarized light fields, and the like.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the polarization-independent optical beam splitter can only realize optical beam splitting with specific energy ratio, and the polarization beam splitter combined with the 1/2 wave plate has the beam splitting paths which are perpendicular to each other and the polarization states which are orthogonal to each other although the energy splitting ratio is adjusted. The invention provides an adjustable transverse dislocation optical beam splitter/combiner, which can realize that simultaneously emergent beam splitting beams have two paths of parallel beams with the same or vertical polarization and certain transverse dislocation, wherein the beam splitting ratio of the two paths can be randomly adjusted, and the displacement of the transverse dislocation can be randomly adjusted within a certain range.
The technical solution of the invention is as follows:
an adjustable transverse dislocation laser beam splitter/combiner is characterized by comprising an 1/2 wave plate, an optical prism bonding body, a 1/4 wave plate and a light returning element;
the optical prism bonding body comprises a first right-angle prism and a trapezoidal prism, and included angles between an inclined plane of the first right-angle prism and two right-angle planes are both 45 degrees; the included angles between the two inclined planes of the trapezoidal prism and the bottom surface are both 45 degrees, and the included angles between the two inclined planes of the trapezoidal prism and the top surface are both 135 degrees; a polarization beam splitting film layer is plated between the inclined plane of the first right-angle prism and one inclined plane of the trapezoidal prism, and the two inclined planes are bonded to form the optical prism bonding body;
or the optical prism bonding body comprises a first right-angle prism and a second right-angle prism, and included angles between an inclined plane of the first right-angle prism and the two right-angle surfaces are both 45 degrees; the included angles between the two right-angle surfaces of the second right-angle prism and the inclined surface are both 45 degrees; a polarization beam splitting film layer is plated between the inclined plane of the first right-angle prism and one right-angle surface of the second right-angle prism, and the two surfaces are bonded to form the optical prism bonding body;
the optical prism adhesive body is characterized in that the surface of the polarization beam splitting film layer is perpendicular to the other right-angle surface of the second right-angle prism or the other inclined surface of the trapezoidal prism, so that two paths of light of the vertical polarization component and the horizontal polarization component after polarization beam splitting are transmitted in parallel and in opposite directions, and the two paths of light have a certain dislocation distance in the transverse direction;
linearly polarized laser in any polarization direction enters the optical prism adhesive body through the 1/2 wave plate, wherein a horizontal polarization component penetrates through the polarization beam splitting film layer to enter the second right-angle prism or the trapezoidal prism and is reflected to form a first beam splitting beam, a vertical polarization component is reflected by the polarization beam splitting film layer and then enters the light returning element through the 1/4 wave plate, and after being reflected by the light returning element, the vertical polarization component returns along the parallel direction of an incident light path, passes through the 1/4 wave plate again and then exits from the right-angle surface and the inclined surface of the second right-angle prism or the inclined surface and the bottom surface of the trapezoidal prism in sequence to form a second beam splitting beam;
or two parallel horizontal polarized lasers are incident to the optical prism adhesive body from the bottom surface, wherein the first laser is incident to the right-angle surface of the second right-angle prism or the inclined surface of the trapezoidal prism through the bottom surface, the first laser penetrates through the polarized beam splitting film layer after being reflected and sequentially passes through the right-angle surface of the first right-angle prism and the 1/2 wave plate to be emitted, the second laser is incident to the light returning element through the inclined surface of the second right-angle prism or the bottom surface of the trapezoidal prism and through the 1/4 wave plate, the light passing through the light returning element returns along the parallel direction of an incident light path, the second laser passes through the 1/4 wave plate again and is reflected through the polarized beam splitting film layer and sequentially passes through the right-angle surface of the first right-angle prism and the 1/2 wave.
The 1/2 wave plate can realize 360-degree rotation adjustment, so that the energy ratio between the two transverse dislocation beam splitting beams can be adjusted at will.
The surface of the polarization beam splitting film layer is perpendicular to the other right-angle surface of the second right-angle prism or the other inclined surface of the trapezoidal prism, so that the two paths of light of the vertical polarization component and the horizontal polarization component after polarization beam splitting are transmitted in parallel and in opposite directions, and the two paths of light have a certain dislocation distance in the transverse direction.
The fast axis direction of the 1/4 wave plate forms an included angle of 45 degrees with the vertical direction.
The light returning element is a metal reflector, such as aluminum plating or gold plating, a dielectric reflector for laser wavelength, or a right-angle prism.
The distance between the light return element and the top surface of the optical prism bonding body can be adjusted within a certain range, so that the phase delay of the two beam splitting optical paths can be adjusted randomly.
The light return element is arranged on the one-dimensional linear piezoelectric ceramic driver.
The optical prism bonding body is arranged on a two-dimensional moving platform, and can be horizontally adjusted along two vertical directions, so that the arbitrary adjustment of the transverse dislocation distance between the two paths of beam splitting light within a certain range is realized.
The length of the right-angle side of the second right-angle prism is equal to that of the first right-angle prism
And the size of the inclined plane of the first right-angle prism is equal to that of the right-angle plane of the second right-angle prism.
The size of the inclined plane of the trapezoidal prism is equal to that of the inclined plane of the first right-angle prism.
When the light returning element is selected as a reflector, the wave surfaces of the two paths of light splitting beams are transversely turned relatively; when the light returning element is a right-angle prism, the wave surfaces of the two paths of light splitting beams are in consistent relative orientation.
On the other hand, the invention also provides an adjustable transverse dislocation laser beam splitter/combiner, which is characterized by comprising an 1/2 wave plate, an optical prism bonding body and a light returning element;
the optical prism bonding body comprises a first right-angle prism and a trapezoidal prism, and included angles between an inclined plane of the first right-angle prism and two right-angle planes are both 45 degrees; the included angles between the two inclined planes of the trapezoidal prism and the bottom surface are both 45 degrees, and the included angles between the two inclined planes of the trapezoidal prism and the top surface are both 135 degrees; a polarization beam splitting film layer is plated between the inclined plane of the first right-angle prism and one inclined plane of the trapezoidal prism, and the two inclined planes are bonded to form the optical prism bonding body;
linearly polarized laser in any polarization direction enters the optical prism adhesive body through the 1/2 wave plate, wherein a horizontal polarization component penetrates through the polarization beam splitting film layer to enter the trapezoidal prism and be reflected to form a first beam splitting light, a vertical polarization component is reflected by the polarization beam splitting film layer and then enters the light returning element, the light returning element is reflected by the light returning element, the light returning element returns along the parallel direction of an incident light path, and the light returning element is emitted through the top surface and the bottom surface of the trapezoidal prism to form a second beam splitting light.
Or two parallel horizontal polarization lasers are incident to the optical prism adhesive body from the bottom surface, wherein the first laser is incident to the inclined surface of the trapezoidal prism through the bottom surface, penetrates through the polarization beam splitting film layer after being reflected and sequentially passes through the right-angle surface of the first right-angle prism and the 1/2 wave plate to be emitted, the second laser is incident to the light return element sequentially through the bottom surface and the top surface of the trapezoidal prism, the light passing through the light return element returns along the parallel direction of an incident light path, reaches the polarization beam splitting film layer through the right-angle surface of the first right-angle prism, is reflected through the polarization beam splitting film layer and then sequentially passes through the other surface of the first right-angle prism and the 1/2 wave plate to be emitted, and two beams of emergent light are.
When the beam splitter is used for beam combination, it is necessary to ensure that the transverse offset distance between two paths of parallel incident light is within the transverse distance adjustment range of the beam splitter, and to ensure that the polarization directions of the two paths of light are horizontal. The common-path beam combination of the two transversely staggered light beams can be realized by adjusting the transverse displacement in the Y-axis direction, and the polarization orientation of the combined light beam can be adjusted by adjusting the energy ratio and the relative phase delay of the two incident lights.
Technical effects of the invention
The adjustable transverse dislocation optical beam splitter/combiner has the advantages that two parallel beams which are transversely dislocated and emit beam splitting beams simultaneously can be realized, the beam splitting ratio of the two parallel beams can be adjusted at will, and the displacement of transverse dislocation can be adjusted at will within a certain range, so that the adjustable transverse dislocation optical beam splitter/combiner is greatly convenient for the construction and adjustment of a plurality of optical systems.
Description of the drawings:
FIG. 1 is a schematic diagram of an adjustable lateral offset laser beam splitter/combiner;
fig. 2 is a schematic view and three-dimensional view of the rectangular prism 102.
Fig. 3 is a schematic view and three-dimensional view of the trapezoidal prism 104.
FIG. 4 is a schematic diagram of two preferred embodiments of a prism adhesive in which (a) first right angle prism 102, polarizing beam splitting film layer 103, and trapezoidal prism 104 are adhered; (b) the first right-angle prism 102, the polarization beam splitting film layer 103 and the second right-angle prism 107 are bonded schematically.
FIG. 5 shows six typical embodiments of an adjustable transverse-dislocation laser beam splitter/combiner, wherein the (A) optical prism bonding body is formed by bonding a right-angle prism and a trapezoidal prism, and the light return element is a reflector, so that two paths of transverse-dislocation laser beams with the same polarization path output are realized; (B) the optical prism bonding body is bonded with the trapezoidal prism by using a right-angle prism, the light return element is a right-angle prism, and two paths of light are output by using the same polarization light path in a transverse staggered manner; (III) the optical prism bonding body is bonded with a right-angle prism by using a right-angle prism, and the light return element is a reflector, so that two paths of output with transverse dislocation and the same polarization light path are realized; (D) the optical prism bonding body is bonded with the trapezoidal prism by using a right-angle prism, the light return element is a right-angle prism, and two paths of transversely staggered and vertically polarized light paths are output;
in the figure: 101-1/2 wave plates; 102 — a first right angle prism; 103-a polarizing beam splitting film layer; 104-a trapezoidal prism; 105-1/4 wave plate; 106-a light return element; 107-second right angle prism.
Detailed Description
Referring to fig. 1, the adjustable laterally-staggered laser beam splitter/combiner mainly includes an 1/2 wave plate 101, a 1/4 wave plate 105, a light returning element 106, a right-angle prism 102, a trapezoidal prism 104, and a polarization beam splitting film layer 103 plated between the two prisms. The length of the right-angle side of the right-angle prism 102 is a, and the included angle between the bevel edge and the right-angle side is 45 degrees, wherein the inclined plane a is a coating adhesive surface (fig. 2). The length of the upper side of the trapezoidal prism is B, the length of the bottom side of the trapezoidal prism is 2a + B, the included angle between two inclined sides and the bottom side is 45 degrees, the inclined plane B is a coating adhesive surface (shown in figure 3), and when the length of the upper side B is 0, the trapezoidal prism is degenerated into a right-angle prism. The polarization beam splitting film layer 103 may be a polarization beam splitting film layer with a high extinction ratio for monochromatic laser, or a broadband polarization beam splitting film layer within a certain spectral width range. The light returning element 106 may be a common aluminum-plated mirror or a right-angle prism. As shown in FIG. 1, a linearly polarized laser beam with an arbitrary polarization direction enters the optical prism bonded body from 1/2 wave plate along the Y-axis direction in the figure, and the polarization distribution of the laser beam transmitted through 1/2 wave plate is
α is an included angle between the polarization direction of incident linearly polarized light and the horizontal direction, theta is an included angle between the main axis direction of 1/2 wave plate and the horizontal direction, and the Jones matrix of 1/2 wave plate is
Substituting the formula (2) into the formula (1) to obtain
The laser passing through 1/2 wave plate enters into right angle prism and enters into polarization beam splitting film layer, wherein horizontal polarization component enters into trapezoidal prism through polarization beam splitting film layer, and polarization distribution is
The vertical polarization component is reflected by the polarization beam splitting film layer and transmitted along the negative Z-axis direction, and the polarization distribution is
The horizontal polarization component reaches 45-degree inclined plane of the trapezoidal prism, is deflected by 90 degrees in the total internal reflection propagation direction, is propagated along the Z-axis direction and exits from the bottom surface of the trapezoidal prism to form a first beam splitting light of the beam splitter, namely
The other beam of light is vertically polarized component and is transmitted along the negative Z axis to reach 1/4 wave plate, the main axis direction of the 1/4 wave plate and the polarization direction form an angle of 45 degrees, and the emergent light field is
The outgoing light field passes through the light returning element 106, the propagation direction of which is reversed, and passes through the 1/4 wave plate again, and the outgoing light field is
E3＝J1/4(3π/4)JRE1， (8)
Wherein 1/4 wave plate Jones matrix is
The Jones matrix of the specular reflection is
Substituting into formula (7) to obtain
Namely, the emergent light field is also horizontally polarized, which is the other path of emergent light of the beam splitter. The polarization directions of the two transversely staggered laser beams which are realized by the beam splitter are consistent, and the energy ratio of the two laser beams is
By adjusting the orientation of the 1/2 waveplate, i.e., the θ angle in equation (12), we can achieve the energy ratio between the two split beams.
As a simple example, when the incident linearly polarized light is horizontally polarized light, i.e. α is 0, the splitting ratio of the two paths of light can be simplified as,
this shows that arbitrary adjustment of the two-way splitting ratio from 0 to infinity can be achieved by adjusting the orientation of the 1/2 wave plate.
In addition, by adjusting the incident position of the incident beam, the arbitrary adjustment of the transverse displacement between the two beams of beam splitting light which are emitted in parallel within a certain range can be realized. Based on the structure shown in the attached figure 1, the upper edge of the trapezoidal prism is taken as a reference zero point, when the distance between the incident light and the upper edge is ax, the distance between the centers of the two outgoing beam splitters is as follows,
d＝2ax,0＜x＜1. (14)
assuming that the radius of the incident beam is r, the adjusting range of the transverse dislocation distance between the two emergent beams is d ∈ [2r + b,2(a-r) + b ] (15)
In practice, each optical element has a certain clear aperture, and assuming that the effective clear aperture ratio of the rectangular prism 102, the trapezoidal prism 104 and the film 103 is β, the adjustment range of the lateral offset distance between the two actual split beams is d e [2(r + a (1- β)) + b,2(β a-r) + b ] (16)
In addition, the adjustable laterally offset beam splitter can also be implemented by replacing the normal mirror 106 with a right angle prism, or the trapezoidal prism 104 with a right angle prism 107 (fig. 4), to achieve the various embodiments shown in fig. 5.
In the four embodiments of fig. 5, the above analysis is performed for embodiment a, and for the other three embodiments, the adjustment range of the lateral misalignment distance between the two split beams corresponding to embodiments b and d is d e [2(r + a (1- β)) + b-e,2(β a-r) + b-e ] (17)
The adjustment range of the transverse dislocation distance between the two split light beams corresponding to the embodiment C is d epsilon [2(r + a (1- β)),2(β a-r) ] (18)
In addition, the implementation modes A and C can cause the wave fronts of the two paths of beam splitting light to turn over relatively horizontally, and the wave fronts of the two paths of beam splitting light in the implementation modes B and C are consistent in orientation. Such horizontal inversion of the wavefront has important application requirements in certain applications, such as complex polarization beam synthesis and lateral shearing interferometers.
When the beam splitter is used for beam combination, it is necessary to ensure that the transverse dislocation distance between the two incident lights is within the transverse distance adjustment range of the beam splitter, and to ensure that the polarization directions of the two incident lights are in the horizontal direction. The common light path combination of two paths of light beams which are transversely staggered can be realized by adjusting the transverse displacement in the Y-axis direction. The polarization orientation of the combined light is related to the energy ratio and the phase delay of the two paths of incident light.
Example (b):
the following provides a specific embodiment of an adjustable lateral misalignment laser beam splitter/combiner, taking embodiment a as an example.
Assuming that the operating wavelength of the laser is 532 nm, the base materials of the rectangular prism 102 and the trapezoidal prism 104 are fused silica, and the refractive index thereof is 1.4607 (532 nm for the operating wavelength). The inclined plane of the right-angle prism 102 and the trapezoidal prism 104 is coated with a polarization beam splitting film layer 103 with high refractive index and low refractive index alternately. 1/2 wave plate 101 is arranged in front of the incidence plane of the right-angle prism through a rotating polaroid frame, and the fast axis direction of the wave plate can be adjusted by 360 degrees. Incident light passes through the 1/2 wave plate and then passes through the polarization beam splitting film layer, and the vertical polarization component is reflected by the film layer to realize 90-degree deflection, and then enters the 1/4 wave plate 105, and the fast axis direction of the 1/4 wave plate forms 45 degrees with the polarization direction. The light transmitted through the 1/4 wave plate is reflected by the mirror 106, returns to the original path, passes through the 1/4 wave plate again, changes the polarization direction into horizontal polarization, and then transmits through the polarization beam splitting film layer and exits through the bottom surface of the trapezoidal prism. The other path of light passing through the polarization beam splitting film layer is horizontal polarized light, penetrates through the polarization film layer and is transmitted in the trapezoidal prism to reach the other inclined plane of the trapezoidal prism, the incident angle is 45 degrees and is larger than the total internal reflection angle (43.2 degrees), so that the reflected total reflection is carried out, and the reflected total reflection is emitted from the bottom surface of the trapezoidal prism, so that two paths of parallel horizontal staggered light beams with the same polarization direction are formed.
In addition, the mirror 106 is mounted on a single stage moving in the Y-axis direction, and adjustment of the relative distance between the mirror 106 and the rectangular prism 102 can be achieved. When this distance satisfies the condition 2c + λ/2 of 1.4607b, the two split beams are strictly equal in optical path length. Therefore, the two paths of optical path difference dynamic adjustment can be realized by adjusting the relative distance between the reflecting mirror 106 and the right-angle prism 102, which has important practical value for the application occasions of optical holography, coherent detection and the like.
The above-mentioned adjustable transverse offset laser beam splitter/combiner only represents one specific embodiment of the present invention, and should not be interpreted as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, numerous changes and modifications can be made to the details of the embodiments and the representative devices set forth in this patent without departing from the basic idea of the invention, which falls within the scope of the invention.
In summary, the invention provides an adjustable transverse dislocation laser beam splitter/combiner, which can be widely applied to the fields of various optical coherent detection, optical holography, complex optical field regulation and control, and the like.
Claims (11)
1. An adjustable transverse dislocation laser beam splitter/combiner is characterized by comprising an 1/2 wave plate (101), an optical prism bonding body, a 1/4 wave plate (105) and a light returning element (106);
the optical prism bonding body comprises a first right-angle prism (102) and a trapezoidal prism (104), and included angles between an inclined plane of the first right-angle prism and two right-angle surfaces are both 45 degrees; the included angles between the two inclined planes of the trapezoidal prism and the bottom surface are both 45 degrees, and the included angles between the two inclined planes of the trapezoidal prism and the top surface are both 135 degrees; a polarization beam splitting film layer (103) is plated between the inclined plane of the first right-angle prism and one inclined plane of the trapezoidal prism, and the two inclined planes are bonded to form the optical prism bonding body;
or the optical prism bonding body comprises a first right-angle prism (102) and a second right-angle prism (107), and the included angle between the inclined plane of the first right-angle prism and the two right-angle surfaces is 45 degrees; the included angles between the two right-angle surfaces of the second right-angle prism and the inclined surface are both 45 degrees; a polarization beam splitting film layer (103) is plated between the inclined plane of the first right-angle prism and one right-angle surface of the second right-angle prism, and the two surfaces are bonded to form the optical prism bonding body;
linearly polarized laser in any polarization direction enters an optical prism adhesive body through an 1/2 wave plate (101), wherein a horizontal polarization component penetrates through a polarization beam splitting film layer (103) to enter a second right-angle prism (107) or a trapezoidal prism (104) and is reflected to form a first beam splitting beam, a vertical polarization component is reflected by a vibration beam splitting film layer (103), then enters a light returning element (106) through a 1/4 wave plate (105), is reflected by the light returning element (106), returns along the parallel direction of an incident light path, passes through a 1/4 wave plate again, and then sequentially passes through the first right-angle prism, the polarization beam splitting film layer, a right-angle surface and an inclined surface of the second right-angle prism (107) or sequentially passes through an inclined surface and a bottom surface of the trapezoidal prism (104) to be emitted to form a second beam splitting beam;
or two parallel horizontally polarized laser beams enter the optical prism adhesive body from the bottom surface, wherein the first laser beam enters the right-angle surface of the second right-angle prism (107) or the inclined surface of the trapezoidal prism (104) through the bottom surface, penetrates through the polarization beam splitting film layer (103) after being reflected and sequentially exits through the right-angle surface of the first right-angle prism (102) and the 1/2 wave plate (101), the second laser beam enters the light returning element (106) through the inclined surface of the second right-angle prism (107) or the bottom surface of the trapezoidal prism (104) and through the 1/4 wave plate (105), the light passing through the light returning element returns along the parallel direction of an incident light path, passes through the 1/4 wave plate again and is reflected by the polarization beam splitting film layer (103), then the laser beams sequentially pass through a right-angle surface of the first right-angle prism (102) and an 1/2 wave plate (101) to be emitted, and the two paths of emergent light are combined coherently to form combined laser.
2. The adjustable laterally displaced laser beam splitter/combiner according to claim 1, wherein the 1/2 wave plate (101) is capable of 360 degree rotation adjustment, thereby achieving arbitrary adjustment of energy ratio between the two laterally displaced split beams.
3. The tunable laterally-staggered laser beam splitter/combiner according to claim 1, wherein the plane of the polarization beam splitting film layer (103) is perpendicular to another right-angle plane of the second right-angle prism (107) or another inclined plane of the trapezoidal prism (104), so that the two beams of polarized light split into the vertical polarization component and the horizontal polarization component are propagated in parallel and in opposite directions, and the two beams of polarized light have a certain lateral misalignment distance.
4. The tunable laterally displaced laser demultiplexer/combiner of claim 1, wherein the fast axis of the 1/4 wave plate (105) is at a 45 degree angle to the vertical.
5. The tunable laterally displaced laser demultiplexer/combiner according to claim 1, wherein the light returning element (106) is a metal mirror, such as aluminum or gold plated, a dielectric mirror for laser wavelength, or a right angle prism.
6. The adjustable laterally displaced laser demultiplexer/combiner of claim 1, wherein the distance between the light returning element (106) and the top surface of the optical prism adhesive can be adjusted within a certain range, so as to achieve arbitrary adjustment of the phase retardation of the two split optical paths.
7. The tunable laterally displaced laser demultiplexer/combiner according to claim 6, wherein the light returning element (106) is mounted on a one-dimensional linear piezoceramic driver.
8. The adjustable laser beam splitter/combiner with lateral misalignment according to claim 1 or 7, wherein the optical prism bonding body is mounted on a two-dimensional moving platform, which can realize horizontal adjustment of the optical prism bonding body along two vertical directions, thereby realizing arbitrary adjustment of the lateral misalignment distance between the two split beams within a certain range.
9. The tunable laterally displaced laser demultiplexer/combiner of claim 1, wherein the right angle side length of the second right angle prism (107) is the right angle side length of the first right angle prism (102)
And the size of the inclined plane of the first right-angle prism is equal to that of the right-angle plane of the second right-angle prism.
10. The adjustable laterally misaligned laser demultiplexer/combiner of claim 1, wherein the trapezoidal prism (104) has a slope dimension equal to that of the first right-angle prism (102).
11. An adjustable transverse dislocation laser beam splitter/combiner is characterized by comprising an 1/2 wave plate (101), an optical prism bonding body and a light returning element (106);
the optical prism bonding body comprises a first right-angle prism (102) and a trapezoidal prism (104), and included angles between an inclined plane of the first right-angle prism and two right-angle surfaces are both 45 degrees; the included angles between the two inclined planes of the trapezoidal prism and the bottom surface are both 45 degrees, and the included angles between the two inclined planes of the trapezoidal prism and the top surface are both 135 degrees; a polarization beam splitting film layer (103) is plated between the inclined plane of the first right-angle prism and one inclined plane of the trapezoidal prism, and the two inclined planes are bonded to form the optical prism bonding body;
linearly polarized laser light in any polarization direction enters the optical prism adhesive body through the 1/2 wave plate (101), wherein a horizontal polarization component penetrates through the polarization beam splitting film layer (103) to enter the trapezoidal prism (104) and be reflected to form a first beam splitting light, a vertical polarization component is reflected by the polarization beam splitting film layer (103) and then enters the light returning element (106), and after being reflected by the light returning element (106), the vertical polarization component returns along the parallel direction of an incident light path and is emitted out through the top surface and the bottom surface of the trapezoidal prism (104) to form a second beam splitting light.
Or two parallel mutually-perpendicular polarized lasers are incident to the optical prism adhesive body from the bottom surface, wherein the horizontally-polarized lasers are incident to the inclined surface of the trapezoidal prism (104) through the bottom surface, are reflected, penetrate through the polarization beam splitting film layer (103) and sequentially pass through the right-angle surface of the first right-angle prism (102) and the 1/2 wave plate (101) to be emitted; perpendicular polarization laser incides back optical element (106) through the bottom surface and the top surface of trapezoidal prism (104) in proper order, and the light that passes back optical element returns along incident light path parallel direction, reaches polarization beam splitting rete (103) through the right angle face of first right angle prism (102), reflects through this polarization beam splitting rete, then passes through another right angle face of first right angle prism (102) and 1/2 wave plate (101) outgoing in proper order, and two bundles of emergent light are coherent to be closed beam and is formed and close a bundle laser.
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| CN113013715A (en) * | 2021-02-25 | 2021-06-22 | 中国科学院理化技术研究所 | Discrete polarization laser beam splitting device and system thereof |
| CN113381271A (en) * | 2021-06-01 | 2021-09-10 | 中国科学院理化技术研究所 | Polarized laser light splitting device and system |
| CN114265204A (en) * | 2020-09-16 | 2022-04-01 | 中国工程物理研究院激光聚变研究中心 | Device and method for generating high-power laser far-field position ultrastrong longitudinal electric field |
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