Integrated optical machine device for two-dimensional magneto-optical trap

Abstract

The utility model discloses an integrated optical machine device for a two-dimensional magneto-optical trap, which belongs to the field of cold atoms and comprises a collimation light, a repulsion light, a light splitting structure, the two-dimensional magneto-optical trap and a reflection structure, and the light splitting structure, the two-dimensional magneto-optical trap and the reflection structure are sequentially arranged along a first direction. The reflecting structure comprises a reflecting mirror group, a front plate, a middle plate, a rear plate, a first bolt and a second bolt, the reflecting mirror group is mounted on the front plate, the lower end of the front plate is connected with the middle plate, and the right end of the middle plate is connected with the rear plate; a first bolt hole and a second bolt hole are formed in the upper end of the middle plate, the first bolt penetrates through the first bolt hole to be connected with the front plate, the second bolt penetrates through the second bolt hole and abuts against the front plate, and the first bolt drives the upper end of the front plate to move towards the middle plate when screwed relative to the first bolt hole. And when the second bolt is screwed relative to the second bolt hole, the upper end of the front plate is driven to move away from the middle plate, so that the cooling efficiency of the two-dimensional magneto-optical trap can be improved.

Description

Technical Field

[0001] This invention belongs to the field of cold atom technology, specifically relating to an integrated optomechanical device for a two-dimensional magneto-optical trap. Background Technology

[0002] Cold atoms are widely used in precision measurement fields, such as cold atom interferometers, cold atom gravimeters, and cold atom clocks. A magneto-optical trap (MOT) is a potential trap that utilizes a combination of magnetic fields and the scattering force of laser light. In cold atom fabrication, two-dimensional magneto-optical traps (2D-MOTs) are typically used to decelerate hot atoms in two dimensions to generate a slow atomic beam. In atomic fountain clocks, 2D-MOTs are commonly used to increase the velocity of the atomic beam entering a three-dimensional magneto-optical trap (3D-MOT), accelerating the loading rate of the 3D-MOT, reducing the dead time of the system, suppressing the Dick effect, and improving clock stability.

[0003] Currently, common optomechanical devices for two-dimensional magneto-optical traps (METs) include collimated beams, repulsive beams, the MET itself, and a reflecting structure. The collimated beam enters the MET vertically, is incident on the reflecting structure, and is reflected back into the MET. The repulsive beam enters the MET horizontally. The reflecting structure includes mirrors; the collimated beam is reflected after striking the mirrors, forming a reflected beam. Using this structure, two-dimensional cooling of atoms can be achieved under the influence of the collimated and repulsive beams and the magnetic field of the MET, forming a slow atomic beam. However, the installation precision of the mirrors in traditional optomechanical devices is poor, and tilting of the mirrors can easily cause the reflected beam and incident beam to misalign, thus affecting the cooling efficiency of the MET. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this invention provides an integrated optomechanical device for a two-dimensional magneto-optical trap. The technical problem to be solved by this invention is achieved through the following technical solution:

[0005] In a first aspect, this utility model provides an integrated optomechanical device for a two-dimensional magneto-optical trap, including a collimating beam, a repulsive beam, a beam splitting structure, a two-dimensional magneto-optical trap, and a reflection structure, wherein the beam splitting structure, the two-dimensional magneto-optical trap, and the reflection structure are arranged sequentially along a first direction.

[0006] Collimated light is incident on the beam splitting structure along the first direction, split into two beams and incident on the two-dimensional magneto-optical trap, then incident on the reflection structure, and reflected back to the two-dimensional magneto-optical trap. Repulsive light is incident on the two-dimensional magneto-optical trap along the second direction. The first and second directions are perpendicular to each other.

[0007] The reflective structure includes a reflector assembly, a front plate, a middle plate, a rear plate, a first bolt, and a second bolt. The front plate, middle plate, and rear plate are arranged sequentially at intervals along a direction perpendicular to the surface of the front plate. The reflector assembly is mounted on the front plate. The lower end of the front plate is connected to the middle plate, and the right end of the middle plate is connected to the rear plate.

[0008] The upper end of the middle plate is provided with a first bolt hole and a second bolt hole. The first bolt passes through the first bolt hole and is connected to the front plate. The second bolt passes through the second bolt hole and presses against the front plate. The first bolt and the first bolt hole are threaded together. When the first bolt is turned relative to the first bolt hole, it drives the upper end of the front plate to move toward the middle plate. The second bolt and the second bolt hole are threaded together. When the second bolt is turned relative to the second bolt hole, it drives the upper end of the front plate to move away from the middle plate.

[0009] In one embodiment of the present invention, the beam splitting structure includes a first beam splitting component and a second beam splitting component, which are arranged sequentially along a direction perpendicular to the first direction;

[0010] The first beam splitting assembly includes a first polarizing beam splitter and a first quarter-wave plate arranged sequentially along a first direction, and the second beam splitting assembly includes a second polarizing beam splitter and a second quarter-wave plate arranged sequentially along the first direction.

[0011] In one embodiment of this utility model, the beam splitting structure further includes a housing, in which a first polarizing beam splitter and a second polarizing beam splitter are installed. The front end face of the housing is provided with two through holes, and an annular surrounding plate is provided on the outer periphery of each of the two through holes. The annular surrounding plate and the through holes are coaxially arranged, and the diameter of the annular surrounding plate is larger than the diameter of the through holes. A first pressure ring is provided in each of the two annular surrounding plates. A first 1 / 4 wave plate and a second 1 / 4 wave plate are respectively nested in the two annular surrounding plates and are pressed tightly between the first pressure ring and the front end face of the housing.

[0012] In one embodiment of the present invention, the reflector assembly includes a first reflector component and a second reflector component, which are arranged sequentially along a direction perpendicular to the first direction.

[0013] The first reflecting assembly includes a third quarter-wave plate and a first zero-degree total reflection mirror arranged sequentially along the first direction, and the second reflecting assembly includes a fourth quarter-wave plate and a second zero-degree total reflection mirror arranged sequentially along the first direction.

[0014] In one embodiment of this utility model, the reflective structure further includes a third bolt and a fourth bolt, and the left end of the rear plate is provided with a third bolt hole and a fourth bolt hole;

[0015] The third bolt passes through the third bolt hole and connects to the middle plate. The fourth bolt passes through the fourth bolt hole and presses against the middle plate. The third bolt and the third bolt hole are threaded together. When the third bolt is turned relative to the third bolt hole, it causes the left end of the middle plate to move towards the rear plate. When the fourth bolt is turned relative to the fourth bolt hole, it causes the left end of the middle plate to move away from the rear plate.

[0016] In one embodiment of this utility model, there are two first bolt holes, and the two first bolt holes are symmetrically arranged on both sides of the second bolt hole. There are two first bolts, and the two first bolts correspond to the two first bolt holes respectively.

[0017] In one embodiment of this utility model, there are two third bolt holes, and the two third bolt holes are symmetrically arranged on both sides of the fourth bolt hole. There are two third bolts, and the two third bolts correspond to the two third bolt holes respectively.

[0018] In one embodiment of this utility model, two mirror tubes are installed on the front panel, and the first reflective component and the second reflective component are respectively installed inside the two mirror tubes.

[0019] In one embodiment of the present invention, the front plate is provided with two through holes, and two lens barrels are respectively corresponding to the two through holes and respectively installed in the two through holes. The lens barrel is provided with a second pressure ring and an annular protrusion, and the first reflection component and the second reflection component are both pressed between the second pressure ring and the annular protrusion.

[0020] In one embodiment of the present invention, the reflective structure further includes a plurality of screws, and a plurality of screw holes are provided on the inner wall of the through hole. The plurality of screw holes are distributed along the circumference of the through hole, and the plurality of screws and the plurality of screw holes correspond one-to-one. The screws pass through the screw holes and press against the outer circumferential surface of the lens barrel.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] In the above-described scheme of this application, the integrated optomechanical device includes a collimating beam, a repulsive beam, a beam-splitting structure, a two-dimensional magneto-optical trap, and a reflecting structure. The beam-splitting structure, the two-dimensional magneto-optical trap, and the reflecting structure are arranged sequentially along a first direction. The collimating beam is incident on the beam-splitting structure along the first direction, split into two beams, and then incident on the two-dimensional magneto-optical trap. The beam is then incident on the reflecting structure and reflected back into the two-dimensional magneto-optical trap. The repulsive beam is incident on the two-dimensional magneto-optical trap along a second direction, and the first and second directions are perpendicular to each other. Thus, under the action of the two sets of orthogonal beams of collimating and repulsive beams and the magnetic field of the two-dimensional magneto-optical trap, two-dimensional cooling of atoms can be achieved, forming a slow atom beam. The repulsive beam can repel the slow atom beam, accelerating the atom loading rate. The reflective structure includes a reflector assembly, a front plate, a middle plate, a rear plate, a first bolt, and a second bolt. The front plate, middle plate, and rear plate are arranged sequentially at intervals along a direction perpendicular to the surface of the front plate. The reflector assembly is mounted on the front plate. The lower end of the front plate is connected to the middle plate, and the right end of the middle plate is connected to the rear plate. The upper end of the middle plate is provided with a first bolt hole and a second bolt hole. The first bolt passes through the first bolt hole and connects to the front plate. The second bolt passes through the second bolt hole and presses against the front plate. The first bolt and the first bolt hole are threadedly engaged. When the first bolt is screwed relative to the first bolt hole, it causes the upper end of the front plate to move toward the middle plate. The second bolt and the second bolt hole are threadedly engaged. When the second bolt is screwed relative to the second bolt hole, it causes the upper end of the front plate to move away from the middle plate. This structure allows for the application of a pulling force towards the middle plate to the front plate by tightening the first bolt, and a pushing force away from the middle plate by tightening the second bolt. Thus, when installation errors occur in the reflector assembly, the installation angle of the reflector assembly can be adjusted by tightening the first and second bolts, thereby adjusting the propagation directions of the incident and emitted beams. This ensures that the incident and emitted beams coincide or reduces the deviation between them, thereby improving the cooling efficiency of the two-dimensional magneto-optical trap. Furthermore, applying two opposing forces to the front plate using the first and second bolts clamps the front plate securely, improving its stability and consequently enhancing the overall stability of the optomechanical device.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the integrated optomechanical device in an embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the beam-splitting structure in an embodiment of this utility model;

[0026] Figure 3 This is a cross-sectional view of the beam-splitting structure in an embodiment of this utility model;

[0027] Figure 4This is a schematic diagram of the reflective structure in an embodiment of this utility model;

[0028] Figure 5 This is a rear view of the reflective structure in an embodiment of this utility model;

[0029] Figure 6 This is a cross-sectional view of the reflective structure in an embodiment of this utility model.

[0030] Reference numerals: 1-collimating light, 2-repulsive light, 3-beam splitting structure, 31-first polarizing beam splitter, 32-first quarter-wave plate, 33-second polarizing beam splitter, 34-second quarter-wave plate, 35-box body, 36-annular surrounding plate, 37-first pressure ring, 4-two-dimensional magneto-optical trap, 5-reflection structure, 51-reflector group, 511-third quarter-wave plate, 512-first zero-degree total reflection mirror, 513-fourth quarter-wave plate, 514-second zero-degree total reflection mirror, 52-front plate, 53-middle plate, 54-rear plate, 55-second bolt, 56-first bolt, 57-fourth bolt, 58-third bolt, 6-slow atomic beam, 7-mirror tube, 8-second pressure ring, 9-annular protrusion, 10-screw. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0032] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6This utility model embodiment provides an integrated optomechanical device for a two-dimensional magneto-optical trap 4, including a collimated beam 1, a repulsive beam 2, a beam splitting structure 3, a two-dimensional magneto-optical trap 4, and a reflective structure 5. The beam splitting structure 3, the two-dimensional magneto-optical trap 4, and the reflective structure 5 are arranged sequentially along a first direction. The collimated beam 1 is incident on the beam splitting structure 3 along the first direction, split into two beams by the beam splitting structure 3 and incident on the two-dimensional magneto-optical trap 4, then incident on the reflective structure 5, and reflected into the two-dimensional magneto-optical trap 4. The repulsive beam 2 is incident on the two-dimensional magneto-optical trap 4 along a second direction, the first direction and the second direction being perpendicular to each other. The reflective structure 5 includes a mirror assembly 51, a front plate 52, a middle plate 53, a rear plate 54, a first bolt 56, and a second bolt 55. The front plate 52, middle plate 53, and rear plate 54 are arranged sequentially at intervals along a direction perpendicular to the surface of the front plate 52. The reflector assembly 51 is mounted on the front plate 52. The lower end of the front plate 52 is connected to the middle plate 53, and the right end of the middle plate 53 is connected to the rear plate 54. The upper end of the middle plate 53 is provided with a first bolt hole and a second bolt hole. The first bolt 56 passes through the first bolt hole and is connected to the front plate 52. The second bolt 55 passes through the second bolt hole and presses against the front plate 52. The first bolt 56 and the first bolt hole are threadedly engaged. When the first bolt 56 is screwed relative to the first bolt hole, it causes the upper end of the front plate 52 to move toward the middle plate 53. The second bolt 55 and the second bolt hole are threadedly engaged. When the second bolt 55 is screwed relative to the second bolt hole, it causes the upper end of the front plate 52 to move away from the middle plate 53.

[0033] In some embodiments of this application, the two-dimensional magneto-optical trap (2D-MOT) of the fountain clock contains three types of laser beams: cooling light, re-pump light, and repulsion light. The transversely non-uniform magnetic field within the potential trap provides an environment where radiation pressure varies throughout. The cooling light subjects the atoms in the potential trap to a centripetal light scattering force, which acts as a damping force, reducing the transverse kinetic energy of the atoms and achieving initial two-dimensional cooling. The re-pump light re-pumps atoms that have spontaneously transitioned to non-cooled cycle energy levels back into the cooling cycle, maintaining the continuity of the cooling process. The repulsion light axially propels the cooled atoms from the 2D-MOT region to the next stage of the three-dimensional magneto-optical trap (3D-MOT) or fountain.

[0034] In some embodiments of this application, aluminum alloy is selected as the material for the optomechanical structural components, and titanium screws are used to mechanically press together the various mechanical structural components and optical elements to ensure the non-magnetic characteristics and structural reliability of the optomechanical structure.

[0035] In some embodiments of this application, the collimated light 1 uses a direct-emission adjustable light polarization direction optical collimator designed in the laboratory in the early stage to replace the initial light source, and the number of optical fibers is simplified in the design, with a single optical fiber containing both cooling light and repumping light.

[0036] In some embodiments of this application, such as Figure 1 As shown, the first direction is vertical, and the second direction is horizontal.

[0037] In some embodiments of this application, the lower end of the front plate 52 and the lower end of the middle plate 53 may be connected by an arc-shaped transition plate.

[0038] In some embodiments of this application, the light reflected by the reflective structure 5 into the two-dimensional magneto-optical trap 4 and the repulsive light 2 are orthogonal. Under the action of the two sets of orthogonal light and the magnetic field of the two-dimensional magneto-optical trap 4, two-dimensional cooling of atoms can be achieved, forming a slow atom beam 6. Among them, the repulsive light 2 is used to repel the slow atom beam 6, thereby accelerating the atom loading rate.

[0039] In the above-described scheme of this application, the integrated optomechanical device includes a collimated beam 1, a repulsive beam 2, a beam splitting structure 3, a two-dimensional magneto-optical trap 4, and a reflective structure 5. The beam splitting structure 3, the two-dimensional magneto-optical trap 4, and the reflective structure 5 are arranged sequentially along a first direction. The collimated beam 1 is incident on the beam splitting structure 3 along the first direction, split into two beams by the beam splitting structure 3, and incident on the two-dimensional magneto-optical trap 4. The beams are then incident on the reflective structure 5 and reflected back into the two-dimensional magneto-optical trap 4. The repulsive beam 2 is incident on the two-dimensional magneto-optical trap 4 along a second direction, with the first and second directions perpendicular to each other. Thus, under the action of the two sets of orthogonal beams, collimated beam 1 and repulsive beam 2, and the magnetic field of the two-dimensional magneto-optical trap 4, two-dimensional cooling of atoms can be achieved, forming a slow atom beam 6. The repulsive beam 2 can repel the slow atom beam 6, accelerating the atom loading rate. The reflective structure 5 includes a reflector assembly 51, a front plate 52, a middle plate 53, a rear plate 54, a first bolt 56, and a second bolt 55. The front plate 52, the middle plate 53, and the rear plate 54 are arranged sequentially at intervals along a direction perpendicular to the surface of the front plate 52. The reflector assembly 51 is mounted on the front plate 52. The lower end of the front plate 52 is connected to the middle plate 53, and the right end of the middle plate 53 is connected to the rear plate 54. The upper end of the middle plate 53 is provided with a first bolt hole and a second bolt hole. The first bolt 56 passes through the first bolt hole and is connected to the front plate 52. The second bolt 55 passes through the second bolt hole and presses against the front plate 52. The first bolt 56 and the first bolt hole are threadedly engaged. When the first bolt 56 is screwed relative to the first bolt hole, it causes the upper end of the front plate 52 to move toward the middle plate 53. The second bolt 55 and the second bolt hole are threadedly engaged. When the second bolt 55 is screwed relative to the second bolt hole, it causes the upper end of the front plate 52 to move away from the middle plate 53. With this structure, tightening the first bolt 56 applies a pulling force to the front plate 52 towards the middle plate 53, while tightening the second bolt 55 applies a pushing force to the front plate 52 away from the middle plate 53. Thus, when installation errors occur in the reflector assembly 51, the installation angle of the reflector assembly 51 can be adjusted by tightening the first bolt 56 and the second bolt 55, thereby adjusting the propagation direction of the incident and emitted beams. This ensures that the incident and emitted beams coincide or reduces the deviation between them, thereby improving the cooling efficiency of the two-dimensional magneto-optical trap 4. Furthermore, applying two opposing forces to the front plate 52 using the first bolt 56 and the second bolt 55 clamps and fixes the front plate 52, improving its stability and consequently enhancing the overall stability of the optomechanical device.

[0040] In some embodiments of this application, such as Figure 1 , Figure 2 and Figure 3As shown, the beam-splitting structure 3 includes a first beam-splitting component and a second beam-splitting component, which are arranged sequentially along a direction perpendicular to a first direction. The first beam-splitting component includes a first polarizing beam splitter 31 and a first quarter-wave plate 32 arranged sequentially along the first direction. The second beam-splitting component includes a second polarizing beam splitter 33 and a second quarter-wave plate 34 arranged sequentially along the first direction. With this structure, the polarization state of light can be adjusted using the first polarizing beam splitter 31, the first quarter-wave plate 32, the second polarizing beam splitter 33, and the second quarter-wave plate 34 to obtain the desired polarized light.

[0041] In some embodiments of this application, the collimated light 1 can be linearly polarized light. After the collimated light 1 enters the beam splitting structure 3, the linearly polarized light is adjusted for ellipticity by the first polarizing beam splitter 31, the first quarter-wave plate 32, the second polarizing beam splitter 33, and the second quarter-wave plate 34, resulting in two beams of right-hand circularly polarized light or left-hand circularly polarized light. The two beams of right-hand circularly polarized light or left-hand circularly polarized light are then incident into the reflection structure 5 after passing through the two-dimensional magneto-optical trap 4.

[0042] In some embodiments of this application, such as Figure 2 and Figure 3 As shown, the beam splitting structure 3 also includes a housing 35. A first polarizing beam splitter 31 and a second polarizing beam splitter 33 are installed inside the housing 35. The front end face of the housing 35 has two through holes. An annular surrounding plate 36 is provided around each of the two through holes. The annular surrounding plate 36 and the through holes are coaxially arranged, and the diameter of the annular surrounding plate 36 is larger than the diameter of the through holes. A first pressure ring 37 is provided inside each of the two annular surrounding plates 36. A first quarter-wave plate 32 and a second quarter-wave plate 34 are nested within the two annular surrounding plates 36 and are pressed tightly between the first pressure ring 37 and the front end face of the housing 35. Using this structure, the first quarter-wave plate 32 and the second quarter-wave plate 34 are fixed by the annular surrounding plate 36 and the first pressure ring 37, which improves the stability of the installation of the first quarter-wave plate 32 and the second quarter-wave plate 34. Furthermore, the beam splitting structure 3 described above has high integration and compactness, facilitating system miniaturization.

[0043] In some embodiments of this application, the beam-splitting structure 3 is made of a non-magnetic material, which suppresses the influence of stray fields on atomic temperature. Simultaneously, the beam-splitting structure 3 employs a springless design, which eliminates optical path deviation caused by spring aging and deformation.

[0044] In some embodiments of this application, the housing 35 is further provided with threaded holes for mounting and fixing the first polarizing beam splitter 31, the first quarter-wave plate 32, the second polarizing beam splitter 33, and the second quarter-wave plate 34. The upper and side surfaces of the housing 35 are also provided with elongated slots for adjusting the positions of the first polarizing beam splitter 31 and the second polarizing beam splitter 33 during installation. Threaded holes are provided at the bottom of the housing 35 for easy mounting onto a bracket with elongated slots. The bracket and the housing 35 are connected by bolts, which are located within the elongated slots. The position of the beam splitting structure 3 can be adjusted by adjusting the installation position of the bolts within the elongated slots.

[0045] In some embodiments of this application, such as Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the reflector assembly 51 includes a first reflecting component and a second reflecting component, which are arranged sequentially along a direction perpendicular to the first direction. The first reflecting component includes a third quarter-wave plate 511 and a first zero-degree total reflection mirror 512 arranged sequentially along the first direction. The second reflecting component includes a fourth quarter-wave plate 513 and a second zero-degree total reflection mirror 514 arranged sequentially along the first direction. With this structure, the ellipticity can be adjusted and two beams of polarized light incident through the two-dimensional magneto-optical trap 4 can be reflected by the third quarter-wave plate 511, the first zero-degree total reflection mirror 512, the fourth quarter-wave plate 513, and the second zero-degree total reflection mirror 514. Specifically, after two beams of right-handed or left-handed circularly polarized light pass through the two-dimensional magneto-optical trap 4 and are incident into the reflective structure 5, they can be adjusted and reflected by the third quarter-wave plate 511, the first zero-degree total reflection mirror 512, the fourth quarter-wave plate 513, and the second zero-degree total reflection mirror 514 to form two beams of left-handed or right-handed circularly polarized light that are then incident into the two-dimensional magneto-optical trap 4 to achieve the effect of slowing down atoms.

[0046] In some embodiments of this application, such as Figure 4 , Figure 5 and Figure 6As shown, the reflective structure 5 also includes a third bolt 58 and a fourth bolt 57. The left end of the rear plate 54 has a third bolt hole and a fourth bolt hole. The third bolt 58 passes through the third bolt hole and connects to the middle plate 53. The fourth bolt 57 passes through the fourth bolt hole and presses against the middle plate 53. The third bolt 58 and the third bolt hole are threaded together. When the third bolt 58 is screwed relative to the third bolt hole, it causes the left end of the middle plate 53 to move towards the rear plate 54. When the fourth bolt 57 is screwed relative to the fourth bolt hole, it causes the left end of the middle plate 53 to move away from the rear plate 54. Using this structure, the pitch angle of the reflector assembly 51 can be adjusted by screwing the first bolt 56 and the second bolt 55, and the rotation angle of the reflector assembly 51 can be adjusted by screwing the third bolt 58 and the fourth bolt 57. This adjusts the propagation direction of the incident and outgoing beams, ensuring that the incident and outgoing beams can overlap or reducing the deviation between them, further improving the cooling efficiency of the two-dimensional magneto-optical trap 4.

[0047] In some embodiments of this application, two first bolt holes are provided, and the two first bolt holes are symmetrically arranged on both sides of the second bolt hole. Two first bolts 56 are provided, and the two first bolts 56 correspond to the two first bolt holes respectively. This structure can improve the stability of the reflective structure 5, thereby improving the overall stability of the optomechanical device.

[0048] In some embodiments of this application, two third bolt holes are provided, and the two third bolt holes are symmetrically arranged on both sides of the fourth bolt hole. Two third bolts 58 are provided, and the two third bolts 58 correspond to the two third bolt holes respectively. This structure can improve the stability of the reflective structure 5, thereby improving the overall stability of the optomechanical device.

[0049] In some embodiments of this application, two lens barrels 7 are mounted on the front plate 52. A first reflective assembly and a second reflective assembly are respectively installed within the two lens barrels 7. The front plate 52 has two through holes, and the two lens barrels 7 correspond to and are installed within the two through holes. A second pressure ring 8 and an annular protrusion 9 are provided inside each lens barrel 7. Both the first reflective assembly and the annular protrusion 9 are pressed together. This structure, by pressing the first reflective assembly and the annular protrusion 9 together, improves the stability of the installation of the first reflective assembly and the second reflective assembly.

[0050] In some embodiments of this application, the reflective structure 5 further includes a plurality of screws 10. A plurality of screw holes are provided on the inner wall of the through hole, distributed circumferentially along the through hole. Each screw 10 corresponds to one screw hole, and the screws 10 pass through the screw holes and press against the outer circumferential surface of the lens barrel 7. With this structure, the lens barrel 7 can be adjusted in position along the axial direction of the through hole, thereby improving the installation accuracy of the first and second reflective components.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An integrated optomechanical device for a two-dimensional magneto-optical trap, characterized in that, It includes collimated light, repulsive light, beam splitting structure, two-dimensional magneto-optical trap, and reflection structure, wherein the beam splitting structure, two-dimensional magneto-optical trap, and reflection structure are arranged sequentially along a first direction; The collimated light is incident on the beam splitting structure along the first direction, split into two beams by the beam splitting structure and incident on the two-dimensional magneto-optical trap, incident on the reflection structure through the two-dimensional magneto-optical trap, and reflected by the reflection structure into the two-dimensional magneto-optical trap. The repulsive light is incident on the two-dimensional magneto-optical trap along the second direction, and the first direction and the second direction are perpendicular to each other. The reflective structure includes a reflector assembly, a front plate, a middle plate, a rear plate, a first bolt, and a second bolt. The front plate, the middle plate, and the rear plate are arranged at intervals in a direction perpendicular to the surface of the front plate. The reflector assembly is mounted on the front plate. The lower end of the front plate is connected to the middle plate, and the right end of the middle plate is connected to the rear plate. The upper end of the middle plate is provided with a first bolt hole and a second bolt hole. The first bolt passes through the first bolt hole and is connected to the front plate. The second bolt passes through the second bolt hole and presses against the front plate. The first bolt and the first bolt hole are threadedly engaged. When the first bolt is screwed relative to the first bolt hole, it causes the upper end of the front plate to move toward the middle plate. The second bolt and the second bolt hole are threadedly engaged. When the second bolt is screwed relative to the second bolt hole, it causes the upper end of the front plate to move away from the middle plate.

2. The integrated optomechanical device for a two-dimensional magneto-optical trap according to claim 1, characterized in that, The beam splitting structure includes a first beam splitting component and a second beam splitting component, which are arranged sequentially along a direction perpendicular to the first direction; The first beam splitting component includes a first polarizing beam splitter and a first quarter-wave plate arranged sequentially along the first direction, and the second beam splitting component includes a second polarizing beam splitter and a second quarter-wave plate arranged sequentially along the first direction.

3. The integrated optomechanical device for a two-dimensional magneto-optical trap according to claim 2, characterized in that, The beam splitting structure also includes a housing, in which the first polarizing beam splitter and the second polarizing beam splitter are installed. The front end face of the housing has two through holes, and an annular surrounding plate is provided around each of the two through holes. The annular surrounding plate and the through holes are coaxially arranged, and the diameter of the annular surrounding plate is larger than the diameter of the through holes. A first pressure ring is provided inside each of the two annular surrounding plates. The first quarter wave plate and the second quarter wave plate are respectively nested inside the two annular surrounding plates and are pressed tightly between the first pressure ring and the front end face of the housing.

4. The integrated optomechanical device for a two-dimensional magneto-optical trap according to claim 1, characterized in that, The mirror assembly includes a first reflective component and a second reflective component, which are arranged sequentially along a direction perpendicular to the first direction. The first reflecting component includes a third quarter-wave plate and a first zero-degree total reflection mirror arranged sequentially along the first direction, and the second reflecting component includes a fourth quarter-wave plate and a second zero-degree total reflection mirror arranged sequentially along the first direction.

5. The integrated optomechanical device for a two-dimensional magneto-optical trap according to claim 4, characterized in that, The reflective structure also includes a third bolt and a fourth bolt, and the left end of the rear plate is provided with a third bolt hole and a fourth bolt hole; The third bolt passes through the third bolt hole and is connected to the middle plate. The fourth bolt passes through the fourth bolt hole and presses against the middle plate. The third bolt and the third bolt hole are threaded together. When the third bolt is screwed relative to the third bolt hole, it causes the left end of the middle plate to move toward the rear plate. When the fourth bolt is screwed relative to the fourth bolt hole, it causes the left end of the middle plate to move away from the rear plate.

6. The integrated optomechanical device for a two-dimensional magneto-optical trap according to claim 5, characterized in that, There are two first bolt holes, and the two first bolt holes are symmetrically arranged on both sides of the second bolt hole. There are two first bolts, and the two first bolts correspond to the two first bolt holes respectively.

7. The integrated optomechanical device for a two-dimensional magneto-optical trap according to claim 5, characterized in that, There are two third bolt holes, and the two third bolt holes are symmetrically arranged on both sides of the fourth bolt hole. There are two third bolts, and the two third bolts correspond to the two third bolt holes respectively.

8. The integrated optomechanical device for a two-dimensional magneto-optical trap according to claim 4, characterized in that, Two mirror tubes are mounted on the front panel, and the first reflective component and the second reflective component are respectively installed inside the two mirror tubes.

9. The integrated optomechanical device for a two-dimensional magneto-optical trap according to claim 8, characterized in that, The front plate is provided with two through holes, and the two lens barrels are respectively corresponding to the two through holes and respectively installed in the two through holes. The lens barrel is provided with a second pressure ring and an annular protrusion. The first reflective component and the second reflective component are both pressed between the second pressure ring and the annular protrusion.

10. The integrated optomechanical device for a two-dimensional magneto-optical trap according to claim 9, characterized in that, The reflective structure also includes a plurality of screws, and a plurality of screw holes are provided on the inner wall of the through hole. The plurality of screw holes are distributed circumferentially along the through hole, and the plurality of screws and the plurality of screw holes correspond one-to-one. The screws pass through the screw holes and press against the outer peripheral surface of the lens barrel.

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