Preparation and filling system for alkali metal air chamber of optical fiber bubble cavity

Abstract

The utility model discloses a preparation and filling system of an optical fiber bubble cavity alkali metal gas chamber, which comprises a sealing chamber, a carbon dioxide laser, a first displacement platform, a second displacement platform, an ultraviolet laser, an alkali metal simple substance, a vacuumizing device, an upper computer and a first gas cylinder filled with inert gas, the carbon dioxide laser, the first displacement platform, the second displacement platform, the ultraviolet laser and the alkali metal elementary substance are all arranged in the sealed cavity, and the vacuumizing device, the first gas cylinder and the upper computer are all arranged outside the sealed cavity; the vacuumizing device and the first gas cylinder are communicated to the sealed cavity, and the upper computer is connected with and controls the carbon dioxide laser, the first displacement platform, the second displacement platform and the ultraviolet laser. The preparation and filling system is used for preparing and filling the alkali metal air chamber of the optical fiber bubble cavity.

Description

Technical Field

[0001] The utility model relates to angular rate sensor technology, in particular to a preparation and filling system of an alkali metal air chamber in an optical fiber bubble cavity. Background Art

[0002] The atomic spin gyroscope is a type of gyroscope based on the atomic spin polarization effect. Compared with traditional relay gyroscopes, laser gyroscopes, optical gyroscopes, etc., it can achieve high-precision detection and has shown great development potential and application value in military and civilian fields such as inertial navigation, attitude control, and scientific research.

[0003] The alkali metal gas chamber is a sensitive element that carries the atomic spin in the atomic spin gyroscope and is the core component of the atomic spin gyroscope. Currently, the alkali metal gas chambers commonly used in the market are mostly closed transparent glass chambers manufactured by glass precision welding technology and chip-level gas chambers with glass-silicon-glass three-layer bonding. However, this type of gas chamber has many problems, such as the difficulty of coating the inner wall film layer, the alkali metal gas chamber is prone to discoloration due to the intensified reaction between the alkali metal atoms and the inner wall of the glass, and the integrated heating coil causes an increase in the magnetic field gradient. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a preparation and filling system for preparing and filling an alkali metal gas chamber of an optical fiber bubble cavity.

[0005] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0006] A preparation and filling system for an alkali metal gas chamber of an optical fiber bubble cavity comprises a sealed chamber, a carbon dioxide laser, a first displacement platform, a second displacement platform, an ultraviolet laser, an alkali metal element, a vacuum pumping device, a host computer and a first gas cylinder filled with an inert gas, wherein the carbon dioxide laser, the first displacement platform, the second displacement platform, the ultraviolet laser and the alkali metal element are all arranged in the sealed chamber, and the vacuum pumping device, the first gas cylinder and the host computer are all arranged outside the sealed chamber; the vacuum pumping device and the first gas cylinder are connected to the sealed chamber, and the host computer is connected to control the carbon dioxide laser, the first displacement platform, the second displacement platform and the ultraviolet laser.

[0007] Furthermore, the preparation and filling system also includes a second gas cylinder filled with a buffer gas, wherein the second gas cylinder is located outside the sealed chamber and connected to the sealed chamber.

[0008] Furthermore, the preparation and filling system also includes a third gas cylinder filled with quenching gas, and the third gas cylinder is located outside the sealed chamber and connected to the sealed chamber.

[0009] Furthermore, the first displacement platform and the second displacement platform are arranged opposite to each other in the sealed air chamber.

[0010] Furthermore, the carbon dioxide laser is located above the gap between the first displacement platform and the second displacement platform.

[0011] Furthermore, the alkali metal element is located below the gap between the first displacement platform and the second displacement platform.

[0012] Furthermore, the ultraviolet laser is located directly below the alkali metal element.

[0013] Furthermore, a getter is arranged in an exhaust pipe communicating between the vacuum pumping device and the sealed chamber.

[0014] Furthermore, a pressure gauge is provided in the air intake pipe connecting the first gas cylinder and the sealed chamber.

[0015] Furthermore, the first displacement platform and the second displacement platform are both three-axis displacement platforms.

[0016] The utility model has the following beneficial effects: the preparation and filling system of the utility model is used for preparing and filling the alkali metal gas chamber of the optical fiber bubble cavity. Compared with the traditional alkali metal gas chamber, the prepared and filled optical fiber bubble cavity alkali metal gas chamber has high air tightness, high surface accuracy and good air chamber inner wall state. At the same time, it is easier to realize the release and filling of alkali metal atoms and inert gas in a vacuum environment, and can solve the problems of quantitative filling of high-purity alkali metal atoms and precise control of the inert gas, structural air tightness, etc., which can further improve the performance of the gas chamber, and then promote the development of angular rate sensors towards small size, long life, high performance, miniaturization and integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a principle structural diagram of the preparation and filling system provided by the utility model. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Embodiment 1

[0023] like Figure 1 As shown, a preparation and filling system of an alkali metal gas chamber in an optical fiber bubble cavity comprises a sealed chamber 1, a carbon dioxide laser 2, a first displacement platform 3, a second displacement platform 4, an ultraviolet laser 5, an alkali metal element 6, a vacuum pumping device 7, a host computer 8 and a first gas cylinder 9 filled with an inert gas, wherein the carbon dioxide laser 2, the first displacement platform 3, the second displacement platform 4, the ultraviolet laser 5 and the alkali metal element 6 are all arranged in the sealed chamber 1, and the vacuum pumping device 7, the first gas cylinder 9 and the host computer 8 are all arranged outside the sealed chamber 1; the vacuum pumping device 7 and the first gas cylinder 9 are connected to the sealed chamber 1, and the host computer 8 is connected to control the carbon dioxide laser 2, the first displacement platform 3, the second displacement platform 4 and the ultraviolet laser 5.

[0024] The preparation and filling system of the utility model is used for preparing and filling the alkali metal gas chamber of the optical fiber bubble cavity. Compared with the traditional alkali metal gas chamber, the prepared and filled optical fiber bubble cavity alkali metal gas chamber has high air tightness, high surface accuracy and good air chamber inner wall state. At the same time, it is easier to achieve the release and filling of alkali metal atoms and inert gas in a vacuum environment, and can solve the problems of quantitative filling of high-purity alkali metal atoms and precise control of the inert gas, structural air tightness, etc., which can further improve the performance of the gas chamber, and then promote the development of angular rate sensors towards small size, long life, high performance, miniaturization and integration.

[0025] When preparing and filling the alkali metal gas chamber of the optical fiber bubble cavity, the first optical fiber 14 and the second optical fiber 15 are respectively arranged on the first displacement platform 3 and the second displacement platform 4 in the sealed chamber 1, and the first optical fiber 14 has a first hemispherical hole 140 on one end face, and the second optical fiber 15 has a second hemispherical hole 150 on one end face, and the first hemispherical hole 140 and the second hemispherical hole 150 are the same size, and then the sealed chamber 1 is closed to form a sealed space; then, the upper computer 8 controls the vacuum device 7 to start , so as to evacuate the sealed chamber 1 to form a vacuum environment in the sealed chamber 1; then open the first gas cylinder 9, and fill the sealed chamber 1 with the inert gas in the first gas cylinder 9; then, the host computer 8 controls the ultraviolet laser 5 to start, so that the ultraviolet laser 5 emits a high-function ultraviolet laser to the alkali metal element 6, thereby causing the alkali metal element 6 to vaporize and overflow into the sealed chamber 1 to fill the alkali metal atoms, and by adjusting the opening time of the alkali metal element 6 and the flow rate of the first gas cylinder 9 The mixing ratio between the alkali metal atoms and the inert gas in the sealed chamber 1 is controlled by the host computer 8; when the alkali metal atoms and the inert gas in the sealed chamber 1 reach the desired mixing ratio, the host computer 8 controls the first displacement platform 3 and the second displacement platform 4 to respectively drive the first optical fiber 14 and the second optical fiber 15 to move, so as to adjust the relative position between the first optical fiber 14 and the second optical fiber 15, so that the first hemispherical hole 140 and the second hemispherical hole 150 are aligned with each other and abutted together; finally, the host computer 8 controls the carbon dioxide laser 2 to emit a high-power carbon dioxide laser to the abutting interface between the first hemispherical hole 140 and the second hemispherical hole 150, so as to melt the abutting interface between the first hemispherical hole 140 and the second hemispherical hole 150, so that the first hemispherical hole 140 and the second hemispherical hole 150 are fused together to form a spherical bubble cavity, and the alkali metal atoms and the inert gas originally located in the first hemispherical hole 140 and the second hemispherical hole 150 are sealed in the spherical bubble cavity, and finally the alkali metal gas chamber of the optical fiber bubble cavity is obtained.

[0026] Preferably, the preparation and filling system further comprises a second gas cylinder 10 filled with a buffer gas and a third gas cylinder 11 filled with a quenching gas, wherein the second gas cylinder 10 and the third gas cylinder 11 are located outside the sealed chamber 1 and are connected to the sealed chamber 1 .

[0027] When the first gas cylinder 9 is opened and the inert gas in the first gas cylinder 9 is filled into the sealed chamber 1, the second gas cylinder 10 and the third gas cylinder 11 can also be opened simultaneously to fill the buffer gas in the second gas cylinder 10 and the quenching gas in the third gas cylinder 11 into the sealed chamber 1, so that after the first hemispherical hole 140 and the second hemispherical hole 150 are fused, an optical fiber bubble cavity alkali metal gas chamber filled and sealed with alkali metal atoms, inert gas, buffer gas and quenching gas is obtained.

[0028] The first displacement platform 3 and the second displacement platform 4 are arranged opposite to each other in the sealed chamber 1 , so that the first hemispherical hole 140 on the first optical fiber 14 faces the second hemispherical hole 150 on the second optical fiber 15 .

[0029] The carbon dioxide laser 2 is located above the gap between the first displacement platform 3 and the second displacement platform 4 , the alkali metal element 6 is located below the gap between the first displacement platform 3 and the second displacement platform 4 , and the ultraviolet laser 5 is located directly below the alkali metal element 6 .

[0030] The preparation and filling system of the present invention arranges the alkali metal element 6 below the gap between the first displacement platform 3 and the second displacement platform 4, so that when the ultraviolet laser 5 emits a high-power ultraviolet laser to the alkali metal element 6 to excite the alkali metal element 6 to vaporize and overflow the alkali metal atoms, the alkali metal atoms can be quickly filled in the first hemispherical pores and the second hemispherical pores.

[0031] Preferably, a getter 12 is provided in the air extraction pipeline communicating between the vacuum extraction device 7 and the sealed chamber 1 to absorb the remaining air in the air extraction pipeline.

[0032] Preferably, a pressure gauge 13 is provided in the air intake pipes of the first gas cylinder 9, the second gas cylinder 10 and the third gas cylinder 11 connected to the sealed chamber 1, so as to monitor the intake pressure of the inert intake gas, buffer gas and quenching gas.

[0033] Electronic valves may be respectively provided on the gas outlets of the first gas cylinder 9, the second gas cylinder 10 and the third gas cylinder 11, and the upper computer 8 controls the electronic valves of the first gas cylinder 9, the second gas cylinder 10 and the third gas cylinder 11 to open and close, so as to realize automatic gas intake control of the inert gas, buffer gas and quenching gas.

[0034] In this embodiment, the first displacement platform 3 and the second displacement platform 4 are both three-axis displacement platforms, which respectively drive the first optical fiber 14 and the second optical fiber 15 to displace in three directions of X-axis, Y-axis and Z-axis, wherein the X-axis, Y-axis and Z-axis are perpendicular to each other.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A preparation and filling system for an alkali metal gas chamber in an optical fiber bubble cavity, characterized in that: The invention comprises a sealed chamber, a carbon dioxide laser, a first displacement platform, a second displacement platform, an ultraviolet laser, an alkali metal element, a vacuum pumping device, a host computer and a first gas cylinder filled with an inert gas, wherein the carbon dioxide laser, the first displacement platform, the second displacement platform, the ultraviolet laser and the alkali metal element are all arranged in the sealed chamber, and the vacuum pumping device, the first gas cylinder and the host computer are all arranged outside the sealed chamber; the vacuum pumping device and the first gas cylinder are connected to the sealed chamber, and the host computer is connected to control the carbon dioxide laser, the first displacement platform, the second displacement platform and the ultraviolet laser.

2. The preparation and filling system according to claim 1, characterized in that: The preparation and filling system further comprises a second gas cylinder filled with a buffer gas, wherein the second gas cylinder is located outside the sealed chamber and is connected to the sealed chamber.

3. The preparation and filling system according to claim 1 or 2, characterized in that: The preparation and filling system further includes a third gas cylinder filled with a quenching gas, wherein the third gas cylinder is located outside the sealed chamber and is connected to the sealed chamber.

4. The preparation and filling system according to claim 1, characterized in that: The first displacement platform and the second displacement platform are arranged opposite to each other in the sealed chamber.

5. The preparation and filling system according to claim 4, characterized in that: The carbon dioxide laser is located above the gap between the first displacement platform and the second displacement platform.

6. The preparation and filling system according to claim 4, characterized in that: The alkali metal element is located below the gap between the first displacement platform and the second displacement platform.

7. The preparation and filling system according to claim 6, characterized in that: The ultraviolet laser is located directly below the alkali metal element.

8. The preparation and filling system according to claim 1, characterized in that: A getter is arranged in an exhaust pipe communicating between the vacuum pumping device and the sealed chamber.

9. The preparation and filling system according to claim 1, characterized in that: A pressure gauge is arranged in the air intake pipe communicating with the first gas cylinder and the sealed chamber.

10. The preparation and filling system according to claim 1, characterized in that: The first displacement platform and the second displacement platform are both three-axis displacement platforms.

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