Rubidium bubble heat absorption heating device

Abstract

The utility model relates to the technical field of alkali metal temperature control devices, in particular to a rubidium bubble heat absorption heating device. The utility model provides a rubidium bubble heat absorption heating device which comprises an absorption cell body, the absorption cell body is provided with a containing space, light passing openings are formed in the two ends of the absorption cell body, the light passing openings are communicated with the containing space, and the containing space is used for containing rubidium bubbles; the heating assembly is arranged in the accommodating space, and the heating assembly is used for heating the rubidium bubble; and the transparent sealing pieces are arranged at the positions of the light passing openings in the two sides, and the transparent sealing pieces are used for sealing the containing space. According to the technical scheme, rubidium atoms are prevented from being condensed on the two end faces due to the fact that the temperatures of the two end faces of the rubidium bubble are low during heating, so that absorption signals are enhanced, and frequency locking of the laser is facilitated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of alkali metal temperature control devices, and in particular to a rubidium bulb endothermic heating device. Background Art

[0002] In atomic physics experiments, lasers are greatly affected by external environmental factors in a free-running state. In order to meet the demand for laser frequency stability in experiments, the modulation transfer frequency locking method is used to stabilize the laser frequency on the atomic transition spectrum.

[0003] The specific implementation method is to divide the laser to be locked into pump light and detection light. The pump light is added with phase modulation information through the EOM RF crystal, and then forms a counter-reflection with the detection light in the atomic gas chamber. The modulated pump light and the unmodulated detection light produce a four-wave mixing effect in the atomic gas chamber, transferring the modulation information to the detection light to be received and demodulated by the detector. In the field of cold atom preparation, rubidium bubbles are usually used as common atomic gas chambers. The intensity of the absorption signal of rubidium atoms in the rubidium bubble is related to the temperature of the rubidium bubble. The higher the temperature of the rubidium bubble, the stronger the absorption signal.

[0004] In a cold environment, the problem of small signal can be solved by heating the rubidium bulb. Usually, the commercial rubidium bulbs on the market are mostly cylindrical, and the incident light beam will pass through the circular surfaces at both ends of the cylinder placed horizontally to interact with the atoms in the gas chamber. Therefore, the two end faces of the rubidium bubble need to remain transparent. At this time, if the rubidium bubble needs to be heated, the heating material can only be close to the side of the cylinder. This will cause the temperature at the two end faces of the rubidium bubble cylinder to be lower than the central area, and the rubidium atoms in the gas chamber will condense on the two end faces to form a coating, thereby affecting the light transmission. Utility Model Content

[0005] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] To this end, the present disclosure provides a rubidium bulb endothermic heating device, comprising:

[0007] An absorption cell body, wherein the absorption cell body has a containing space, and light through holes are provided at both ends of the absorption cell body, the light through holes are communicated with the containing space, and the containing space is used to place the rubidium bulb;

[0008] A heating component, the heating component is arranged in the accommodating space, and the heating component is used to heat the end side of the rubidium bulb;

[0009] A transparent sealing member is provided at the light openings on both sides and is used to seal the accommodating space.

[0010] In a feasible embodiment, the absorption tank body includes: a first absorption tank and a second absorption tank, the first absorption tank and the second absorption tank are detachably connected, and arc grooves are provided in the first absorption tank and the second absorption tank, and the arc grooves on both sides form the accommodating space.

[0011] In a feasible embodiment, the heating assembly includes: a first heating element and a second heating element, the first heating element and the second heating element are arranged at intervals on the inner wall of the absorption pool body in the extension direction, and the first heating element and the second heating element extend from the two side ends of the rubidium bulb to the middle respectively.

[0012] In a feasible implementation manner, the first heating element and the second heating element are in contact with a surface of the rubidium bulb in an extending direction.

[0013] In a feasible implementation manner, the heating component is configured as a flexible heating film.

[0014] In a feasible implementation manner, a clearance hole is provided on the absorption tank body.

[0015] In a feasible implementation manner, a heat conducting portion is arranged around the clearance hole.

[0016] In a feasible implementation manner, the transparent sealing member is configured as heat-resistant glass.

[0017] In a feasible implementation manner, an anti-fog coating or a hydrophobic coating is provided on the transparent sealing member.

[0018] In a feasible implementation manner, a mounting piece is provided at the light opening of the absorption cell body, the mounting piece forms a gap with the end of the rubidium bulb, and the transparent sealing piece is connected to the absorption cell body through the mounting piece.

[0019] Compared with the prior art, the present disclosure includes at least the following beneficial effects: the present disclosure places the rubidium bulb in the accommodation space inside the absorption cell body, the incident light beam acts on the atoms in the gas chamber through the light-through port, the rubidium bulb is heated by a heating component, and a transparent seal is provided at the light-through port to form a closed accommodation space, thereby avoiding the rubidium atoms from condensing on the two end surfaces due to the low temperature of the two end surfaces of the rubidium bulb during heating, thereby enhancing the absorption signal and facilitating the frequency locking of the laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0023] Figure 1 It is a schematic cross-sectional structure diagram of the transparent mounting member, the heating assembly and the absorption cell body disclosed in the present invention;

[0024] Figure 2 This is one of the cross-sectional structural schematic diagrams of the absorption tank body disclosed in the present invention;

[0025] Figure 3 The second schematic diagram of the cross-sectional structure of the absorption tank body disclosed in the present invention;

[0026] Figure 4 It is a structural schematic diagram of the positional relationship between the rubidium bulb installed in the absorption cell body and the heating component disclosed in the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the absorption tank body disclosed in the present invention.

[0028] in, Figures 1 to 5 The correspondence between the reference numerals and the component names is as follows: 1-absorption cell body; 11-light opening; 12-first absorption cell; 13-second absorption cell; 14-arc groove; 15-clearance hole; 16-mounting piece; 2-rubidium bulb; 3-heating assembly; 31-first heating element; 32-second heating element; 4-transparent sealing element. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0031] In a cold environment, the problem of small signal can be solved by heating the rubidium bulb. Usually, commercial rubidium bulbs on the market are mostly cylindrical, and the incident light beam will pass through the circular surfaces at both ends of the horizontally placed cylinder to interact with the atoms in the gas chamber. Therefore, the two end faces of the rubidium bubble need to remain transparent. At this time, if the rubidium bubble needs to be heated, the heating material can only be close to the side of the cylinder. This will cause the temperature at the two end faces of the rubidium bubble cylinder to be lower than the center area, and the rubidium atoms in the gas chamber will condense on the two end faces to form a coating, thereby affecting the light transmission.

[0032] Based on this, the embodiment of the present disclosure provides a rubidium bubble endothermic heating device, in which the rubidium bubble is placed in the accommodating space inside the absorption cell body, the incident light beam acts on the atoms in the gas chamber through the light through hole, the rubidium bubble is heated by a heating component, and a transparent seal is provided at the light through hole to isolate the external cold air, thereby avoiding the rubidium atoms from condensing on the two end surfaces due to the low temperature of the two end surfaces of the rubidium bubble during heating, thereby enhancing the absorption signal and facilitating the frequency locking of the laser.

[0033] The rubidium bubble endothermic heating device is described in detail below through a specific embodiment:

[0034] Reference Figures 1 to 5 As shown, the present disclosure provides a rubidium bubble endothermic heating device, including an absorption cell body 1, the absorption cell body 1 has a accommodating space, and light through holes 11 at both ends of the absorption cell body 1, the light through holes 11 are connected to the accommodating space, and the accommodating space is used to place the rubidium bubble 2; a heating component 3, the heating component 3 is arranged in the accommodating space, and the heating component 3 is used to heat the end side of the rubidium bubble 2; a transparent seal 4, the transparent seal 4 is arranged at the light through holes 11 on both sides, and the transparent seal 4 is used to seal the accommodating space.

[0035] The present invention places the rubidium bubble 2 in the accommodating space of the absorption cell body 1, and the incident light acts on the atoms in the gas chamber through the light openings 11 at both ends of the absorption cell body 1, wherein the shape of the accommodating space can be set to a shape that matches the shape of the rubidium bubble 2 to facilitate the installation and placement of the rubidium bubble 2.

[0036] Further, in order to avoid the problem of rubidium atoms condensing on the two end surfaces caused by the low temperature of the two end surfaces of the rubidium bubble, the present disclosure solves the above-mentioned problem by heating the end side of the rubidium bubble 2 through the heating component 3. It should be noted that the rubidium bubble 2 body includes two sides of the light-transmitting surface opposite to the light-transmitting port 11, and the light-transmitting surface of the rubidium bubble 2 cannot be blocked, so the setting position of the heating component 3 cannot occupy this part. Specifically, the heating component 3 can be set as a flexible heating film, a plastic heating film or a heating tube, etc. The present disclosure specifically selects a flexible heating film to facilitate the assembly and protection of the rubidium bubble 2. Among them, the end side is the side closest to the light-transmitting surface of the specific rubidium bubble 2. For example, if the rubidium bubble is a cylinder, then the side is a cylindrical surface. Because in the normal reaction process, the temperature of the end is low and therefore a coating will be produced, so the heating component 3 should be set at the end 9, but it is not limited to being close to the end, and it can also be at a certain distance, which is specifically set according to the specifications of the rubidium bubble 2.

[0037] Furthermore, transparent seals 4 are arranged at the light openings 11 on both sides, and are used to seal the accommodation space, ensuring light transmission and isolating cold air, so that the temperature difference between the two ends and the middle of the rubidium bulb during heating is not too large, and further avoiding the rubidium atoms condensing on the two end surfaces due to the low temperature of the two end surfaces of the rubidium bulb during heating, thereby enhancing the absorption signal and facilitating the frequency locking of the laser. Specifically, the transparent seal 4 of the present disclosure can be made of transparent PC material, tempered glass, glass, etc., and the present disclosure specifically uses a glass seal.

[0038] In some embodiments, the absorption tank body 1 includes a first absorption tank 12 and a second absorption tank 13, which are detachably connected, and arc grooves 14 are provided in the first absorption tank 12 and the second absorption tank 13, and the arc grooves 14 on both sides form a accommodating space.

[0039] In this embodiment, if Figure 5 As shown, the first absorption tank 12 and the second absorption tank 13 are detachably connected along the dividing line, and the combination method can be selected as follows Figure 5 The manner shown may be other manners, for example, the volume of the first absorption pool 12 is larger than that of the second absorption pool 13, and the combination thereof is combined along the length direction to facilitate the placement of the rubidium bulb 2. Furthermore, the first absorption pool 12 and the second absorption pool 13 may be set to have different shapes to meet the differentiated settings of the appearance in actual use scenarios.

[0040] In some embodiments, the heating assembly 3 includes a first heating element 31 and a second heating element 32 , and the first heating element 31 and the second heating element 32 are spaced apart from each other on the inner wall of the absorption tank body 1 in the extension direction.

[0041] In this embodiment, the heating assembly 3 is divided into a first heating element 31 and a second heating element 32. The temperatures of the first heating element 31 and the second heating element 32 can be independently controlled, so that the heating effect is controllable and the heating effect is enhanced. Furthermore, the first heating element 31 and the second heating element 32 are arranged at intervals so that the heating areas of the two heating elements do not interfere with each other, and the heat between the two does not generate radiation. If necessary, a heat insulation element can be provided to block the heating effect on the rubidium bulb 2 to balance the heating effect and prevent the formation of coatings at both ends.

[0042] In some embodiments, the first heating element 31 and the second heating element 32 are in contact with the surface of the rubidium bulb 2 in the extension direction. In this embodiment, the first heating element 31 and the second heating element 32 are in contact with the cylindrical surface of the rubidium bulb 2 to enhance the heating effect. In addition, there is no gap between the first heating element 31 and the second heating element 32 and the rubidium bulb 2 to avoid air flow, further reducing the possibility of coating.

[0043] In some embodiments, a clearance hole 15 is provided on the absorption tank body 1 .

[0044] In this embodiment, a clearance hole 15 is provided on the absorption cell body 1 to facilitate the placement of the rubidium bulb 2. Furthermore, when the setting range of the heating component 3 is required to be large, the middle part of the rubidium bulb 2 close to the clearance hole 15 will produce a higher temperature than the two ends, and the present disclosure aims to balance the overall temperature of the rubidium bulb 2. Therefore, the present disclosure sets a heat conduction part at the position of the clearance hole to remove excess heat. Specifically, the heat conduction part can be a vent hole around the clearance hole, or a heat sink, a radiator, etc. can be used to dissipate heat at this position. Furthermore, a plurality of temperature sensors can be set on the absorption cell body 1 along the extension direction of the rubidium bulb 2 to monitor the temperature of two parts of the rubidium bulb in real time to control the state of the heating component 3 and the heat conduction part.

[0045] In some embodiments, the transparent seal 4 is configured as heat-resistant glass. In this embodiment, the transparent seal 4 is configured as heat-resistant glass to prevent the heating component 3 from being overheated in the sealed accommodation space and causing the transparent seal 4 to be deformed and damaged.

[0046] In some embodiments, an anti-fog coating or a hydrophobic coating is provided on the transparent seal 4. In this embodiment, an anti-fog coating or a hydrophobic coating is provided on the transparent seal 4 to prevent the generation of fog and water vapor when there is a temperature difference between the inside and the outside of the absorption cell of the present disclosure because the inside is sealed in a cold scene. The anti-fog coating or the hydrophobic coating can effectively prevent the generation of fog and water vapor and avoid the problem of light illumination obstruction.

[0047] In some embodiments, a mounting member 16 is disposed at the light opening 11 of the absorption cell body 1 , the mounting member 16 forms a gap with the end of the rubidium bulb 2 , and the transparent sealing member 4 is connected to the absorption cell body 1 through the mounting member 16 .

[0048] In this embodiment, a mounting member 16 is provided at the position of the light opening 11 of the absorption cell body 1, and when the rubidium bulb 2 is installed in the accommodating space, a gap is formed between the mounting member 16 and the rubidium bulb 2, and a transparent sealing member 4 is provided on the mounting member 16 and connected to the absorption cell body 1, and the transparent mounting member 4 is provided on the side opposite to the rubidium bulb 2, thereby achieving isolation between the heating component 3 and the transparent sealing member 4, reducing the radiation range and heat of the heat, and increasing the service life of the transparent sealing member.

[0049] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0050] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.

[0051] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A rubidium bubble endothermic heating device, characterized in that: include: An absorption cell body (1), the absorption cell body (1) having a containing space, and light through ports (11) at both ends of the absorption cell body (1), the light through ports (11) being in communication with the containing space, and the containing space being used to place a rubidium bulb (2); A heating component (3), the heating component (3) being arranged in the accommodating space and being used for heating the side surfaces of both ends of the rubidium bulb (2); A transparent sealing member (4), wherein the transparent sealing member (4) is arranged at the light-through openings (11) on both sides, and the transparent sealing member (4) is used to seal the accommodating space.

2. The rubidium bubble endothermic heating device according to claim 1, characterized in that: The absorption tank body (1) comprises: a first absorption tank (12) and a second absorption tank (13); the first absorption tank (12) and the second absorption tank (13) are detachably connected, and arc grooves (14) are provided in the first absorption tank (12) and the second absorption tank (13); the arc grooves (14) on both sides form the accommodating space.

3. The rubidium bubble endothermic heating device according to claim 1, characterized in that: The heating assembly (3) comprises: a first heating element (31) and a second heating element (32), wherein the first heating element (31) and the second heating element (32) are arranged at intervals on the inner wall of the absorption cell body (1) in the extension direction, and the first heating element (31) and the second heating element extend from both side ends of the rubidium bulb (2) to the middle.

4. The rubidium bubble endothermic heating device according to claim 3, characterized in that: The first heating element (31) and the second heating element (32) are in contact with the surface of the rubidium bulb (2) in the extension direction.

5. The rubidium bubble endothermic heating device according to claim 1, characterized in that: The heating component (3) is configured as a flexible heating film.

6. The rubidium bulb endothermic heating device according to any one of claims 1 to 5, characterized in that: The absorption tank body (1) is provided with a clearance hole (15).

7. The rubidium bulb endothermic heating device according to claim 6, characterized in that: A heat conducting portion is arranged around the clearance hole (15).

8. The rubidium bubble endothermic heating device according to claim 1, characterized in that: The transparent sealing member (4) is configured as heat-resistant glass.

9. The rubidium bubble endothermic heating device according to claim 1, characterized in that: The transparent sealing element (4) is provided with an anti-fog coating or a hydrophobic coating.

10. The rubidium bubble endothermic heating device according to claim 1, characterized in that: A mounting member (16) is provided at the light opening (11) of the absorption cell body (1), the mounting member (16) forms a gap with the end of the rubidium bulb (2), and the transparent sealing member (4) is connected to the absorption cell body (1) via the mounting member (16).

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