CN110350915B - Miniature bubble type optical frequency scale quantum system - Google Patents
Miniature bubble type optical frequency scale quantum system Download PDFInfo
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- CN110350915B CN110350915B CN201910595625.XA CN201910595625A CN110350915B CN 110350915 B CN110350915 B CN 110350915B CN 201910595625 A CN201910595625 A CN 201910595625A CN 110350915 B CN110350915 B CN 110350915B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 53
- 238000009413 insulation Methods 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 21
- 230000007704 transition Effects 0.000 abstract description 14
- 230000003068 static effect Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 230000005855 radiation Effects 0.000 description 6
- 230000003595 spectral effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 229910052701 rubidium Inorganic materials 0.000 description 4
- 238000001917 fluorescence detection Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000960 laser cooling Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical group [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
- G04F5/14—Apparatus for producing preselected time intervals for use as timing standards using atomic clocks
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/26—Automatic control of frequency or phase; Synchronisation using energy levels of molecules, atoms, or subatomic particles as a frequency reference
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention discloses a miniature bubble type optical frequency scale quantum system which comprises a front support, an external magnetic screen cover, an external magnetic screen cylinder, a front heat insulation gasket, an external cavity, an external heating band, an internal magnetic screen cylinder, a heat insulation cavity, an internal magnetic screen cover, an internal cavity, an internal heating band, an atomic bubble, a front lens support, a front lens, a rear lens support, a rear heat insulation gasket, an optical filter support, an interference optical filter, a photoelectric detector, a rear support and an external cylinder. The invention adopts the axial symmetry design for the main parts, coats the atomic bubble, is easy to process and assemble integrally and has simple light path configuration. By designing the inner and outer double-layer static magnetic shielding and the inner and outer double-layer temperature control system, the influence of static magnetic field and temperature fluctuation on the transition frequency of atoms is reduced.
Description
Technical Field
The invention relates to the field of atomic light frequency scaling devices, in particular to a miniature bubble type light frequency scaling subsystem.
Technical Field
The optical frequency standard is a frequency standard for implementing laser frequency stabilization by using an optical band transition spectral line stabilized by neutral atoms (or ions) as a frequency discrimination signal. Because the atomic transition spectral line of the optical band has an extremely high spectral line Q value, the frequency uncertainty and the frequency stability of the optical frequency standard can reach E-18 magnitude, so that the optical frequency standard becomes a preferred atomic frequency standard in the fields of future physical constant measurement, international atomic time keeping, satellite positioning navigation and the like, and is very likely to replace the cesium fountain microwave frequency standard to become a reference standard defined by 'seconds'. Although the optical frequency standard has extremely high frequency performance index, at present, the optical frequency standard is mostly realized based on cold atoms (or ions), the implementation is complex, a plurality of lasers are generally needed, and a bulky laser cooling (or ion trapping) system and a vacuum system are equipped, so that the volume, the quality and the power consumption of the optical frequency standard are very large at present, so that the optical frequency standard only exists in a laboratory, and the miniaturized product application is difficult to realize.
The bubble type optical frequency standard takes thermal atoms as working atoms, does not need a laser cooling and vacuum system, and has the potential of realizing miniaturization and even microminiaturization. Although the frequency performance index of the thermoatomic optical frequency standard is reduced compared with that of a laboratory optical frequency standard, the comprehensive performance index of the thermoatomic optical frequency standard is still superior to that of the existing microwave frequency standard, so that the thermoatomic optical frequency standard has a good application prospect. The invention discloses a rubidium bubble type optical frequency standard physical system based on two-photon transition, which can realize a thermal atom optical frequency standard by utilizing a saturated absorption spectral line and a two-photon transition spectral line of a thermal atom system, wherein the most common thermal atom system is rubidium atoms in glass bubbles at present.
The simple working mechanism of the rubidium atomic optical frequency standard based on two-photon transition is as follows: the laser with the wavelength of 778nm interacts with rubidium atoms in the glass bulb, and the rubidium atoms in the ground state absorb two photons with opposite momentum at the same time to form 5S1/2Energy level transition to 5D5/2Energy level at 5D5/2Rubidium atom of energy level is firstly transited to 6P by spontaneous radiation3/2Re-transition of energy level to 5S1/2Energy level. The rubidium atoms can radiate fluorescent signals with the wavelength of 420nm in the spontaneous radiation process layer, and the strength of the fluorescent signals reflects the deviation of the detection laser frequency and the two-photon transition frequency, so that the fluorescent signals can be used for locking the frequency of the detection laser on the two-photon transition frequency of the atoms. The rubidium atomic optical frequency standard can be divided into an optical system and a quantum system, wherein the quantum system is responsible for providing a stability atomic transition frequency reference and directly determining the performance of the optical frequency standard, and a proper quantum system is very important for designing the rubidium atomic optical frequency standard. In order to realize the bubble type optical frequency standard with the frequency uncertainty reaching E-13, a quantum system is required to have a stable mechanical structure, a simple optical path configuration, high-efficiency fluorescence collection efficiency, good static magnetic field shielding and temperature control, but at present, related reports about the design of the miniaturized bubble type optical frequency standard quantum system at home and abroad are few.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a miniaturized bubble type optical frequency scale quantum system which is stable in structure, simple in optical path, high in fluorescence detection efficiency, good in magnetostatic shielding and good in temperature control.
The aim of the invention is achieved by the following technical measures:
a miniature bubble type optical frequency scale quantum system comprises an outer barrel, an outer magnetic screen barrel, an interference optical filter and a photoelectric detector are arranged in the outer barrel, the interference optical filter and the photoelectric detector are opposite to the outer magnetic screen barrel, a barrel-shaped outer cavity is arranged in the outer magnetic screen barrel, an outer heating band is circumferentially distributed on the outer wall of the outer cavity, a front heat insulation gasket and a rear heat insulation gasket are respectively arranged at two ends of the outer cavity, an inner magnetic screen barrel is arranged in the outer cavity, a heat insulation cavity is arranged in the inner magnetic screen barrel, an inner cavity, a front lens and a rear lens are arranged in the heat insulation cavity, an inner heating band is circumferentially distributed on the outer wall of the inner cavity, an atomic bubble is arranged in the inner cavity, an atomic bubble light outlet is arranged on the inner cavity, a light inlet sequentially penetrates through the outer barrel, the outer magnetic screen barrel, the front heat insulation gasket, the outer cavity, the inner magnetic screen barrel, the heat insulation cavity and the inner magnetic screen barrel, the light outlet, the rear lens is arranged at the light outlet.
The central axis of the light inlet hole, the central axis of the atom bubble light outlet hole, the central optical axis of the front lens, the central optical axis of the rear lens and the central axis of the light outlet hole are collinear, and the interference filter is opposite to the light outlet hole.
The front lens is arranged on the front lens support, the front lens support is arranged at the atomic bubble light-emitting hole, the rear lens is arranged on the rear lens support, the rear lens support is fixed in the heat insulation cavity, the interference optical filter is arranged on the optical filter support, and the optical filter support is arranged in the outer barrel.
The outer cylinder comprises an outer cylinder body, a front bracket arranged at one end of the outer cylinder body and a rear bracket arranged at the other end of the outer cylinder body;
the external magnetic screen cylinder comprises an external magnetic screen cylinder body and an external magnetic screen cover which covers one end of the external magnetic screen cylinder body;
the inner magnetic screen cylinder comprises an inner magnetic screen cylinder body and an inner magnetic screen cover which is covered at one end of the inner magnetic screen cylinder body.
The magnetic conductivity of the external magnetic screen cylinder, the external magnetic screen cover, the internal magnetic screen cylinder and the internal magnetic screen cover is more than 2000.
The outer cavity and the inner cavity are both provided with thermistors.
The surface of the incident bubble wall of the atomic bubble is plated with the incident film, the incident film increases transmission and increases reflection of the light with the wavelength of 778nm, the surface of the transmission bubble wall of the atomic bubble is plated with the transmission film, the transmission film increases transmission and increases reflection of the light with the wavelength of 420nm and the wavelength of 778nm, the incident bubble wall is opposite to the light inlet hole, and the transmission bubble wall is opposite to the light outlet hole of the atomic bubble.
Compared with the prior art, the invention has the following beneficial effects:
1. the external magnetic screen cover 2, the external magnetic screen barrel 3, the front heat insulation gasket 4, the external cavity 5, the internal magnetic screen barrel 7, the heat insulation cavity 8, the internal magnetic screen cover 9, the internal cavity 10, the front lens support 13, the front lens 14, the rear lens 15, the rear lens support 16, the rear heat insulation gasket 17, the optical filter support 18, the interference optical filter 19, the photoelectric detector 20 and the external barrel 22 are all designed in an axial symmetry mode, the processing is easy, the coaxial installation mode of all the components can be guaranteed, and the whole system is simple, compact and stable in structure.
2. Only one path of clock laser is used for exciting atoms to generate two-photon transition, and the optical axis of an atomic radiation fluorescence signal detection system consisting of an interference filter 19, a filter support 18, a photoelectric detector 20 and a rear support 21 is superposed with the light direction of incident laser, so that the light path structure is simple. The surface of the atomic bubble 12 is coated with a coating, specifically, the surface of the incident bubble wall S1 of the clock laser of the atomic bubble 12 is coated with an incident film, the incident film has antireflection action on the light with the wavelength of 778nm and has reflection increasing action on the light with the wavelength of 420nm, the surface of the transmission bubble wall S2 of the clock laser of the atomic bubble 12 is coated with a transmission film, and the transmission film has antireflection action on the light with the wavelength of 420nm and has reflection increasing action on the light with the wavelength of 778 nm. The incident bubble wall S1 is an incident window of 778nm laser, and the transmission bubble wall S2 is a transmission window of 778nm laser. Clock laser enters the atomic bubble 12 under the action of the anti-reflection film of the incident bubble wall S1, is completely reflected under the action of the reflection increasing film of the transmission bubble wall S2, and transmitted light and reflected light are transmitted in opposite directions, so that rubidium atoms can simultaneously absorb one incident photon and one reflected photon to generate two-photon transition, one path of clock light excited atomic two-photon transition is realized, and the laser path is simplified. The coating film also prevents the clock laser from transmitting out from the bubble wall S2, most of the light transmitted out through the bubble wall S2 is 420nm fluorescence signals of atomic radiation, so that a detection system of the atomic radiation fluorescence signals can share the optical axis with the clock laser, the optical path can be further simplified, and the fluorescence detection efficiency can be improved.
3. The front lens 14, the rear lens 15, the interference filter 19 and the photoelectric detector 20 form a high-efficiency radiation fluorescence detection system. The combination of the front lens 14 and the rear lens 15 converges and collimates the atomic radiation fluorescence, and an interference filter 19 is used for filtering useless stray light in the fluorescence before the photoelectric detector 20, so that the maximum collection efficiency of the fluorescence is realized.
4. The invention is divided into an inner layer and an outer layer for magnetostatic shielding. An inner magnetic screen cylinder 701 and an inner magnetic screen cover 9 made of high-permeability materials (2000) form an inner magnetic screen system, an outer magnetic screen system is formed by an outer magnetic screen cover 2 and an outer magnetic screen cylinder 301 made of high-permeability materials, and the two magnetic screen systems are properly spaced and isolated, so that disturbance of static magnetic field fluctuation on atomic transition frequency can be reduced.
5. The system comprises a double-layer temperature control design to ensure the stability of the temperature of atomic bubbles, an inner cavity 10, an inner heating belt 11 and a thermistor arranged on the inner cavity 10 form a first-layer temperature control system, an outer cavity 5, an outer heating belt 6 and a thermistor arranged on the outer cavity 5 form a second-layer temperature control system, and the two-layer temperature control system is thermally isolated through a high-thermal-resistance heat insulation cavity 8, a front heat insulation gasket 4 and a rear heat insulation gasket 17.
Drawings
Fig. 1 is a schematic sectional view of the structure of the present invention.
Wherein: 1-a front bracket; 2-external magnetic screen cover; 3-external magnetic screen cylinder; 4-leading heat insulating gasket; 5-an outer cavity; 6-external heating zone; 7-internal magnetic screen cylinder; 8-a heat insulation cavity; 9-inner magnetic screen cover; 10-lumen; 11-internal heating zone; 12-atomic vesicles; 13-front lens holder; 14-a front lens; 15-rear lens; 16-rear lens holder; 17-rear heat insulation gasket; 18-a filter holder; 19-an interference filter; 20-a photodetector; 21-rear support; 22-an outer cylinder; 23-light inlet holes; a 24-atom bubble exit pupil; 25-light-emitting holes; 301-external magnetic screen cylinder; 701-an internal magnetic screen cylinder body; 2201-outer cylinder.
Fig. 2 is a schematic cross-sectional view of the atomic bubble 12.
Where S1 is the incident cell wall of the clock light of the atomic bubble 12 and S2 is the transmissive cell wall of the clock light of the atomic bubble 12.
Detailed Description
The present invention will be described in further detail with reference to examples for the purpose of facilitating understanding and practice of the invention by those of ordinary skill in the art, and it is to be understood that the present invention has been described in the illustrative embodiments and is not to be construed as limited thereto.
As shown in figure 1-2, a miniaturized bubble type optical frequency scale quantum system comprises an outer cylinder 22, an outer magnetic screen cylinder 3, an interference filter 19 and a photoelectric detector 20 which are opposite to the outer magnetic screen cylinder 3 are arranged in the outer cylinder 22, a cylindrical outer cavity 5 is arranged in the outer magnetic screen cylinder 3, outer heating bands 6 are distributed on the outer wall of the outer cavity 5 in the circumferential direction, a front heat insulation gasket 4 and a rear heat insulation gasket 17 are respectively arranged at two ends of the outer cavity 5, an inner magnetic screen cylinder 7 is arranged in the outer cavity 5, a heat insulation cavity 8 is arranged in the inner magnetic screen cylinder 7, an inner cavity 10, a front lens 14 and a rear lens 15 are arranged in the heat insulation cavity 8, inner heating bands 11 are distributed on the outer wall of the inner cavity 10 in the circumferential direction, an atom bubble 12 is arranged in the inner cavity 10, an atom bubble light outlet 24 is arranged on the inner cavity 10, and the light inlet 23 sequentially penetrates through the outer cylinder 22, the outer magnetic screen, A heat insulation cavity 8, an inner cavity 10, a light outlet 25 sequentially penetrates through the heat insulation cavity 8, an inner magnetic screen cylinder 7, an outer cavity 5, a rear heat insulation gasket 17 and an outer magnetic screen cylinder 3, a front lens 14 is arranged at an atomic bubble light outlet 24, a rear lens 15 is arranged at the light outlet 25,
the central axis of the light inlet 23, the central axis of the atomic bubble light outlet 24, the central optical axis of the front lens 14, the central optical axis of the rear lens 15, and the central axis of the light outlet 25 are collinear, and the interference filter 19 faces the light outlet 25.
The front lens 14 is arranged on the front lens support 13, the front lens support 13 is arranged at the atomic bubble light outlet hole 24, the rear lens 15 is arranged on the rear lens support 16, the rear lens support 16 is fixed in the heat insulation cavity 8, the interference filter 19 is arranged on the filter support 18, and the filter support 18 is arranged in the outer cylinder 22.
The outer cylinder 22 comprises an outer cylinder 2201, a front bracket 1 arranged at one end of the outer cylinder 2201 and a rear bracket 21 arranged at the other end of the outer cylinder 2201, and the light inlet 23 penetrates through the front bracket 1;
the outer magnetic screen cylinder 3 comprises an outer magnetic screen cylinder body 301 and an outer magnetic screen cover 2 covering one end of the outer magnetic screen cylinder body 301, the light inlet hole 23 penetrates through the outer magnetic screen cover 2, and the light outlet hole 25 penetrates through one end, opposite to the outer magnetic screen cover 2, of the outer magnetic screen cylinder body 301;
the inner magnetic screen cylinder 7 comprises an inner magnetic screen cylinder 701 and an inner magnetic screen cover 9 covering one end of the inner magnetic screen cylinder 701, the light inlet hole 23 penetrates through one end, opposite to the inner magnetic screen cover 9, of the inner magnetic screen cylinder 701, and the light outlet hole 25 penetrates through the inner magnetic screen cover 9.
The magnetic conductivity of the outer magnetic screen cylinder 301, the outer magnetic screen cover 2, the inner magnetic screen cylinder 701 and the inner magnetic screen cover 9 is larger than 2000.
Thermistors are arranged on the outer cavity 5 and the inner cavity 10.
The surface of the incident bubble wall S1 of the clock laser of the atomic bubble 12 is plated with an incident film which transmits and reflects light with a wavelength of 778nm, and the surface of the transmission bubble wall S2 of the clock laser of the atomic bubble 12 is plated with a transmission film which transmits and reflects light with a wavelength of 420nm and 778nm, the incident bubble wall S1 is opposite to the light inlet 23, and the transmission bubble wall S2 is opposite to the light outlet 24 of the atomic bubble.
The atomic bubbles 12 are filled with metal87Rb, the atom bubble 12 is adhered to the inner surface of the inner cavity 10 through silica gel with good thermal conductivity, the front lens 14 is adhered to the groove on the end face of the front lens support 13, and the front lens support 13 is fixed on the right end face of the inner cavity 10 through a screw. The inner heating belt 11 is closely adhered to the outer surface of the inner cavity 10 through silica gel with good thermal conductivity, and the temperature-sensitive thermistor is installed on the left end face of the inner cavity 10, as shown in fig. 1. The inner cavity 10 is arranged in a cylindrical heat insulation cavity 8 made of low-heat-conductivity materials, and the low-heat-conductivity materials can be selected from polyimide or polystyrene. The heat insulation cavity 8 is arranged in a cylindrical inner magnetic screen cylinder 7 made of high magnetic conductivity materials, and the high magnetic conductivity materials can be permalloy. Three screws with low thermal conductivity sequentially penetrate through the front support 1, the outer magnetic screen cover 2, the front heat insulation gasket 4 and the left end face of the outer cavity 5 to be fixed(ii) a Three screws with low thermal conductivity sequentially penetrate through the front heat insulation gasket 4, the outer cavity 5, the inner magnetic screen cylinder 7, the heat insulation cavity 8 and the left end face of the inner cavity 10 to be fixed; three screws with low thermal conductivity penetrate through the heat insulation gasket 4 and are fixed with the left end face of the outer cavity 5. The rear lens 15 is adhered in a groove on the left end face of the rear lens support 16, the inner magnetic screen cover 9 made of a high-magnetic conductivity material and the rear heat insulation gasket 17 made of a low-heat conductivity material are sequentially arranged on the right side of the rear lens support 16, and three low-heat conductivity screws penetrate through the rear heat insulation gasket 17 to be fixed with the right end face of the outer cavity 5; three low-thermal-conductivity screws sequentially penetrate through the rear heat-insulation gasket 17, the outer cavity 5 and the inner magnetic screen cover 9 to be connected with the rear lens support 16; three screws with low thermal conductivity sequentially penetrate through the outer magnetic screen cylinder 301 and the rear heat insulation gasket 17 to be fixed with the right end face of the outer cavity 5. The outer heating belt 6 is tightly adhered to the outer surface of the side wall of the outer cavity 5 through heat-conducting silicon rubber, and the temperature-sensing thermistor is arranged on the left end face of the outer cavity 5. The interference filter 19 is adhered in the groove on the left side of the filter support 18 through silicon rubber, the filter support 18 is installed on the rear support 21 through three screws, and the photoelectric detector 20 is adhered in the installation hole in the center of the rear support 21 through silicon rubber.
The shapes of the outer magnetic screen cover 2, the outer magnetic screen cylinder 3, the front heat insulation gasket 4, the outer cavity 5, the inner magnetic screen cylinder 7, the heat insulation cavity 8, the inner magnetic screen cover 9, the inner cavity 10, the front lens support 13, the front lens 14, the rear lens 15, the rear lens support 16, the rear heat insulation gasket 17, the optical filter support 18, the interference optical filter 19, the photoelectric detector 20 and the outer cylinder 22 are all designed in an axial symmetry mode.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (1)
1. A miniaturized gas bubble type optical frequency scale quantum system comprises an outer barrel (22) and is characterized in that an outer magnetic screen barrel (3), an interference optical filter (19) and a photoelectric detector (20) which are opposite to the outer magnetic screen barrel (3) are arranged in the outer barrel (22), a barrel-shaped outer cavity (5) is arranged in the outer magnetic screen barrel (3), outer heating belts (6) are distributed on the outer wall of the outer cavity (5) in the circumferential direction, a front heat insulation gasket (4) and a rear heat insulation gasket (17) are respectively arranged at two ends of the outer cavity (5), an inner magnetic screen barrel (7) is arranged in the outer cavity (5), a heat insulation cavity (8) is arranged in the inner magnetic screen barrel (7), an inner cavity (10), a front lens (14) and a rear lens (15) are arranged in the heat insulation cavity (8), inner heating belts (11) are distributed on the outer wall of the inner cavity (10) in the circumferential direction, an atomic bubble (12) is arranged in the inner cavity (, the light inlet (23) penetrates through the outer cylinder (22), the outer magnetic screen cylinder (3), the preposed heat insulation gasket (4), the outer cavity (5), the inner magnetic screen cylinder (7), the heat insulation cavity (8) and the inner cavity (10) in sequence, the light outlet (25) penetrates through the heat insulation cavity (8), the inner magnetic screen cylinder (7), the outer cavity (5), the postposition heat insulation gasket (17) and the outer magnetic screen cylinder (3) in sequence, the preposed lens (14) is arranged at the atomic bubble light outlet (24), the postposition lens (15) is arranged at the light outlet (25),
the shapes of an outer magnetic screen cover (2), an outer magnetic screen cylinder (3), a front heat insulation gasket (4), an outer cavity (5), an inner magnetic screen cylinder (7), a heat insulation cavity (8), an inner magnetic screen cover (9), an inner cavity (10), a front lens support (13), a front lens (14), a rear lens (15), a rear lens support (16), a rear heat insulation gasket (17), a light filter support (18), an interference light filter (19), a photoelectric detector (20) and an outer cylinder (22) are all axisymmetric;
the surface of the incident bubble wall of the atomic bubble (12) is plated with an incident film, the incident film increases transmission and increases reflection of light with the wavelength of 778nm and the wavelength of 420nm, the surface of the transmission bubble wall of the atomic bubble (12) is plated with a transmission film, the transmission film increases transmission and increases reflection of light with the wavelength of 420nm and the wavelength of 778nm, the incident bubble wall is opposite to the light inlet hole (23), and the transmission bubble wall is opposite to the light outlet hole (24) of the atomic bubble;
the central axis of the light inlet hole (23), the central axis of the atomic bubble light outlet hole (24), the central optical axis of the front lens (14), the central optical axis of the rear lens (15) and the central axis of the light outlet hole (25) are collinear, and the interference filter (19) is opposite to the light outlet hole (25);
the front lens (14) is arranged on a front lens support (13), the front lens support (13) is arranged at an atomic bubble light outlet hole (24), the rear lens (15) is arranged on a rear lens support (16), the rear lens support (16) is fixed in the heat insulation cavity (8), the interference filter (19) is arranged on a filter support (18), and the filter support (18) is arranged in the outer cylinder (22);
the outer cylinder (22) comprises an outer cylinder body (2201), a front support (1) arranged at one end of the outer cylinder body (2201) and a rear support (21) arranged at the other end of the outer cylinder body (2201);
the outer magnetic screen cylinder (3) comprises an outer magnetic screen cylinder body (301) and an outer magnetic screen cover (2) which covers one end of the outer magnetic screen cylinder body (301);
the inner magnetic screen cylinder (7) comprises an inner magnetic screen cylinder body (701) and an inner magnetic screen cover (9) which covers one end of the inner magnetic screen cylinder body (701);
the magnetic conductivity of the external magnetic screen cylinder (301), the external magnetic screen cover (2), the internal magnetic screen cylinder (701) and the internal magnetic screen cover (9) is more than 2000;
the outer cavity (5) and the inner cavity (10) are both provided with thermistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910595625.XA CN110350915B (en) | 2019-07-03 | 2019-07-03 | Miniature bubble type optical frequency scale quantum system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910595625.XA CN110350915B (en) | 2019-07-03 | 2019-07-03 | Miniature bubble type optical frequency scale quantum system |
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| CN110350915B true CN110350915B (en) | 2021-03-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5670914A (en) * | 1995-09-25 | 1997-09-23 | Northrop Grumman Corporation | Miniature atomic frequency standard |
| CN103501180A (en) * | 2013-09-18 | 2014-01-08 | 北京无线电计量测试研究所 | Light wave anti-reflection type atom bubble and application method thereof |
| JP2015142240A (en) * | 2014-01-28 | 2015-08-03 | セイコーエプソン株式会社 | Quantum interference unit, quantum interference apparatus, atomic oscillator, electronic device and moving object |
| CN108377149A (en) * | 2017-01-30 | 2018-08-07 | 精工爱普生株式会社 | Atomic oscillator and electronic equipment |
| CN108667454B (en) * | 2018-04-17 | 2021-10-22 | 中国科学院国家授时中心 | High-uniformity low-temperature-coefficient cavity bubble system |
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