CN102299714A - Microwave cavity bubble device - Google Patents
Microwave cavity bubble device Download PDFInfo
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- CN102299714A CN102299714A CN2011101832618A CN201110183261A CN102299714A CN 102299714 A CN102299714 A CN 102299714A CN 2011101832618 A CN2011101832618 A CN 2011101832618A CN 201110183261 A CN201110183261 A CN 201110183261A CN 102299714 A CN102299714 A CN 102299714A
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Abstract
The invention discloses a microwave cavity bubble device, belonging to the field of atomic frequency standards, wherein the microwave cavity bubble device comprises an integrated light filtering absorption bubble, a microwave cavity, a photovoltaic cell, a temperature control component, a magnetic induction loop, a magnetic screen and a printed board; the integrated light filtering absorption bubble is positioned in the microwave cavity; the magnetic screen is arranged out of the microwave cavity; the temperature control component is installed on the microwave cavity; the microwave cavity comprises a cavity cover, a cavity body and a coupling loop; the middle part of the cavity cover is provided with a gated grating; the coupling loop is fixed on the cavity cover and is positioned on a central axis of the cavity cover; the photovoltaic cell and the printed board are installed on the cavity cover; the magnetic induction loop is arranged at the periphery of a cavity; a support component is clamped between the integrated light filtering absorption bubble and the bottom part of the cavity, and the expansion coefficient of the support component is greater than that of the microwave cavity. According to the invention, through the arrangement of the support component between the integrated light filtering absorption bubble and the bottom part of the cavity, and the expansion coefficient of the support component is greater than that of the microwave cavity, the influences on the microwave cavity resonant frequency by the changes of temperature can be reduced, thus the degree of stability of the output frequency of a rubidium atomic frequency standard is improved.
Description
Technical field
The present invention relates to the atomic frequency standard field, particularly a kind of microwave cavity bulb apparatus.
Background technology
Quantized system is the important component part of atomic frequency standard, be used under the effect of microwave interrogation signals, output has the light inspection signal of kam-frequency characteristic, is locked on the atom resonance frequency by the output of this light inspection signal with the quartz oscillation crystal, guarantees the stable output of atomic frequency standard.Typical quantized system generally is made of spectroscopic lamp and microwave cavity bulb apparatus two parts.
Existing microwave cavity bulb apparatus generally includes the bubble that filters, absorbs bubble, microwave cavity, photocell, heated constant temperature parts, C field coil and magnetic cup.Its operation principle is as follows: under the effect of spectroscopic lamp exciting light, at first filtered and atomic resonance by the bubble that filters, absorption bubble; Photocell is surveyed the transmitted light after the bubble that filters, the effect of absorption bubble, output light inspection signal.Microwave field that atomic resonance is required and weak magnetostatic field are provided by microwave cavity and C field coil respectively.And the heated constant temperature parts are arranged on the microwave cavity, are mainly used in to the bubble that filters, absorb the operational environment that bubble provides temperature constant.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art:
Because the temperature effect in chamber is very obvious, under the bigger situation of variation of ambient temperature, aforementioned heated constant temperature parts can not be kept the temperature constant of microwave cavity, and the size of microwave cavity is understood temperature influence and changed.And the resonance frequency of microwave cavity depends on factors such as the shape, size, mode of resonance of microwave cavity.When the change in size of microwave cavity, its resonance frequency will depart from the atomic transition spectral line frequency, thereby cause the instability of the output frequency of atomic frequency standard.
Summary of the invention
For under the situation of variation of ambient temperature, improve the stability of the output frequency of atomic frequency standard, the embodiment of the invention provides a kind of microwave cavity bulb apparatus.Described technical scheme is as follows:
A kind of microwave cavity bulb apparatus, comprise that integrated filtering absorbs bubble, microwave cavity, photocell, temperature control parts, magnetic induction loop, magnetic cup and printed board, described integrated filtering absorbs bubble and is positioned at described microwave cavity, described magnetic cup is arranged on outside the described microwave cavity, and described temperature control parts are installed on the described microwave cavity;
Described microwave cavity comprises chamber lid, cavity and coupling loop, and the middle part of described chamber lid is provided with logical grating; Described coupling loop is fixed on described chamber and covers and be positioned on the central axis that covers in described chamber; Described photocell and printed board are installed in described chamber and cover; Described magnetic induction loop is located at described cavity periphery; Be folded with support component between the bottom of described integrated filtering absorption bubble and described cavity, the coefficient of expansion of described support component is greater than the coefficient of expansion of described microwave cavity.
Wherein, described temperature control parts comprise thermistor and heater strip, and described thermistor is installed in described chamber and covers, and the direction of routing of described thermistor is described cavity axis direction; The sidewall of described cavity is provided with groove, and described heater strip adopts the twisted-pair feeder form and is looped around in the described groove.
Preferably, the inwall of described integrated filtering absorption bubble scribbles paraffin layer.
Wherein, described magnetic cup comprises interior magnetic cup, outer magnetic cup and base, be respectively equipped with on the described base be used to place described in the draw-in groove of magnetic cup, outer magnetic cup and microwave cavity, described in magnetic cup described microwave cavity and described outside between the magnetic cup.
Further, be provided with first fixture between described chamber lid and the described interior magnetic cup, be provided with second fixture between described interior magnetic cup and the described outer magnetic cup.
Wherein, described magnetic induction loop comprises the magnetic induction coil tube and is wound on the outer double-layer coil of described magnetic induction coil tube.
Preferably, described microwave cavity adopts the TE011 mould design of cylindrical cavity.
Wherein, described photocell comprises two photocells, and described two photocell symmetries are positioned over the both sides of described coupling loop.
Preferably, described support component, microwave cavity adopt alloy material to make respectively.
Further, described chamber covers and also is provided with tuning screw.
Further, described microwave cavity bulb apparatus also comprises the base plate that places between described integrated filtering absorption bubble and the described support component.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: between the bubble support component is set by filtering in the bottom of described microwave cavity and integrated resonance, the coefficient of expansion of described support component is greater than the coefficient of expansion of described microwave cavity; When ambient temperature raises, microwave cavity becomes big along its cross-sectional direction simultaneously with size axial direction, simultaneously, support component also extends, and geometrical extension is greater than the geometrical extension of microwave cavity, thereby actual chamber height is shortened on the contrary, becoming along the size of cross-sectional direction under the big situation, the constancy of volume that can keep microwave cavity, thereby the resonance frequency of microwave cavity is remained unchanged, in like manner, when ambient temperature descends, the resonance frequency of microwave cavity also can remain unchanged, thereby improves the stability of the output frequency of atomic frequency standard.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of microwave cavity bulb apparatus of providing in the embodiment of the invention;
Fig. 2 is the structural representation of the chamber lid of a kind of microwave cavity bulb apparatus shown in Figure 1;
Fig. 3 is the structural representation of the magnetic induction coil of a kind of microwave cavity bulb apparatus shown in Figure 1;
Fig. 4 is the structural representation of heater strip of the microwave cavity of a kind of microwave cavity bulb apparatus shown in Figure 1;
Fig. 5 is the electromagnetic field distribution schematic diagram of the microwave cavity of a kind of microwave cavity bulb apparatus shown in Figure 1;
Fig. 6 is the magnetic cup structural representation of a kind of microwave cavity bulb apparatus shown in Figure 1;
In the accompanying drawing, the component list of each label representative is as follows:
Integrated filtering absorbs bubble 1, microwave cavity 2, photocell 3a, 3b, thermistor 4, heater strip 5, magnetic induction loop 6, line outlet 7, printed board 8, chamber lid 9, cavity 10, tuning screw 11, coupling loop 12, support component 13, base plate 14, base 15, magnetic induction coil tube 16, double-layer coil 17, hold-down screw 18, interior magnetic cup 19, outer magnetic cup 20, the first fixture 21a, the second fixture 21b, logical grating 22, draw-in groove 23.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, the embodiment of the invention provides a kind of microwave cavity bulb apparatus, this microwave cavity bulb apparatus comprises that integrated filtering absorbs bubble 1, microwave cavity 2, photocell, temperature control parts, magnetic induction loop 6, magnetic cup and printed board 8, described integrated filtering absorbs bubble 1 and is positioned at described microwave cavity 2, described magnetic cup is arranged on outside the described microwave cavity 2, and described temperature control parts are installed on the described microwave cavity 2.Described microwave cavity 2 comprises chamber lid 9, cavity 10 and coupling loop 12, and the middle part of described chamber lid 9 is provided with logical grating 22; Described coupling loop 12 is fixed on the described chamber lid 9 and is positioned on the central axis of described chamber lid 9; Described photocell and printed board 8 are installed on the described chamber lid 9; Described magnetic induction loop 6 is located at described cavity 10 peripheries, is folded with support component 13 between the bottom of described integrated filtering absorption bubble 1 and described cavity 10, and the coefficient of expansion of described support component 13 is greater than the coefficient of expansion of described microwave cavity 2.
Wherein, described support component 13 is used to compensate the chamber that causes because of variations in temperature and changes frequently.Wherein, described coupling loop 12 is used to the O-O microwave resonance transition of atomic hyperfine that magnetic coupling is provided; Described magnetic induction loop 6 is used to integrated filtering to absorb that atom provides energy level transition and quantization axle in the bubble 1; Described temperature control parts are used to integrated filtering to absorb the operational environment that bubble 1 provides constant temperature; Described photocell is used to detect the penetrating light intensity of microwave cavity 2, finishes simultaneously light signal is converted into the signal of telecommunication also by described printed board 8 outputs.
Particularly, the outer wall that the inwall of described cavity 10 and described integrated filtering absorb bubble 1 closely cooperates, and described integrated filtering absorption bubble 1 can slide in microwave cavity 2.Further, described integrated filtering absorbs bubble 1 and described microwave cavity 2 coaxial settings.
Particularly, described microwave cavity 2 can adopt the high metal of thermal conductivity to make, and described support component 13 can adopt alloy material to make.
Particularly, described coupling loop 12 1 ends are connected with the coaxial cable core wire that is fixed well, the other end is fixed on the central axis of described chamber lid 9 by hold-down screw (figure does not show), and place described integrated filtering to absorb bubble 1 top.Described coaxial cable core wire is used for being connected with external circuit, introduces microwave signal, and this knows for those skilled in the art, does not repeat them here.
Further, also be provided with tuning screw 11 on the described chamber lid 9, the axis direction of described tuning screw 11 is identical with the axis direction of described cavity 10.Because machining error, the actual resonance frequency of described microwave cavity 2 and result of calculation have certain difference, can come resonance frequency is finely tuned (the fine setting scope is probably within 100MHz) by changing the length of tuning screw 11 in the chamber.
Preferably, the inwall that described integrated filtering absorbs bubble 1 scribbles paraffin layer, is used to weaken atom relaxation effect.Described microwave cavity bulb apparatus also comprises the base plate 14 that places between described integrated filtering absorption bubble 1 and the described support component 13.The area of described base plate 14 is less than the sectional area of described cavity 10, thereby can move along the axis direction of described microwave cavity 2.Described base plate 14 also can adopt the alloy material manufacturing.
In embodiments of the present invention, integrated filtering absorbs bubble 1 and adopts integrated design, and original optical filtering bubble and absorption bubble are integrated into a bubble, is beneficial to the miniaturization of microwave cavity bulb apparatus like this; Operation material in the bubble be natural rubidium (
87Rb and
85Rb respectively accounts for 27.8% and 72.2%); The first half of bubble mainly plays filter action, and latter half mainly plays the resonance effect; And, charge into buffer gas in order to reduce live width, to improve optical pumping efficient, can absorbing in the bubble 1 at integrated filtering.Know that easily the gas that integrated filtering absorbs in the bubble 1 also can be caesium etc.
Particularly, referring to Fig. 3, described magnetic induction loop 6 is made of magnetic induction coil tube 16 and double-layer coil 17; Described magnetic induction coil tube 16 is set in outside the described cavity 10, and double-layer coil 17 is wound on outside the described magnetic induction coil tube 16.Double-layer coil 17 is the double lacquered wire circle, and is convenient unified from line outlet 7 outlets.
In conjunction with Fig. 1 and Fig. 4, the lateral wall of the cavity 10 of described microwave cavity is provided with groove, described temperature control parts comprise thermistor 4 and heater strip 5, described thermistor 4 is installed on the described chamber lid 9, be used for the induced environment temperature, and the ambient temperature of sensing is sent to temperature-adjusting circuit in the printed board 8 or outside, and described heater strip 5 is looped around in the described groove, and temperature-adjusting circuit be that microwave cavity 2 heats according to the signal controlling heater strip 5 of thermistor 4.Further, the direction of routing of described thermistor 4 is described cavity 10 axis directions, and described heater strip 5 adopts the twisted-pair feeder form, thereby can eliminate the magnetic field longitudinal component that heating current produces, and has avoided the influence of the remanent magnetism of temperature control parts to the frequency marking index.
In embodiments of the present invention, microwave cavity 2 adopts the TE011 mould design of cylindrical cavity, is used to
87The microwave transition of Rb atomic ground state fine structure provides suitable microwave field, and its resonance frequency is consistent with atomic transition frequency as the reference of quantum frequency discrimination.Obviously, microwave cavity 2 also can adopt designs such as TE111 mould.
As shown in Figure 5, the Distribution of Magnetic Field in the microwave cavity 2 is for vertically, and in axial direction parallel, and integrated filtering absorbs bubble 1 and is placed on chamber central authorities, can obtain stronger magnetic field excitation like this, makes things convenient for the hyperfine O-O transition of atom.In addition, microwave electric field distributes parallel with the horizontal tangent plane of cylindrical cavity in the chamber, even two of cylindrical cavity ports are owing to uncap and chamber not driving fit of tube that logical grating 22 causes like this, also can not cut off microwave electric field and cause electromagnetic consumable, instant microwave electric field and atomic interaction and stimulated radiation are fed back.
Particularly, referring to Fig. 2, described photocell comprises photocell 3a and photocell 3b, and described photocell 3a and photocell 3b symmetry are positioned over the both sides of described coupling loop 12.As can be seen from Figure 5, the intensity of the longitudinal component of microwave magnetic field is the strongest in the coupling loop both sides in the microwave cavity, so descend the strongest place of atomic resonance transition signal on the cavity both sides in working order,, can obtain signal to noise ratio preferably like this so photocell is installed in the both sides of central axis symmetrically.Further, described photocell is fixed in the printed board 8, and described printed board 8 is fixed on the chamber lid 9 by hold-down screw 18.Arrange electronic component and circuit in the described printed board 8, be used to receive the signal of telecommunication of photocell 3a, 3b, finished measuring ability; Also be used for constituting the loop, finish temperature control with described heater strip 5 and described thermistor 4.
Particularly, referring to Fig. 1 and Fig. 6, described magnetic cup comprises interior magnetic cup 19, outer magnetic cup 20 and base 15, be respectively equipped with on the described base 15 be used to place described in the draw-in groove 23 of magnetic cup 19, outer magnetic cup 20 and microwave cavity 2, described in magnetic cup 19 described microwave cavity 2 and described outside between the magnetic cup 20.This structure can prevent external magnetic field (as earth magnetism) to atomic energy in the TE011 cylindrical cavity and the division and the influence of " quantization axle ".
Further, correspondence is provided with the first fixture 21a between described chamber lid 9 and the described interior magnetic cup 19, thereby described microwave cavity 2 and described interior magnetic cup 19 are fixed together, correspondence is provided with the second fixture 21b between described interior magnetic cup 19 and the described outer magnetic cup 20, thereby magnetic cup in described 19 and outer magnetic cup 20 are fixed together.Particularly, the described first fixture 21a, the second fixture 21b can be spring bayonet socket device.
The microwave cavity bulb apparatus of the embodiment of the invention has the following advantages: the first, between the bottom of integrated filtering absorption bubble and cavity support component is set, the coefficient of expansion of described support component is greater than the coefficient of expansion of described microwave cavity; When ambient temperature raises, microwave cavity becomes big along its cross-sectional direction simultaneously with size axial direction, simultaneously, support component also extends, and the geometrical extension of support component is greater than the geometrical extension of microwave cavity, thereby actual chamber height is shortened on the contrary, becoming along the size of cross-sectional direction under the big situation, the constancy of volume that can keep microwave cavity, thereby the resonance frequency of microwave cavity is remained unchanged, in like manner, when ambient temperature descends, the resonance frequency of microwave cavity also can remain unchanged, thereby improves the stability of the output frequency of Rb atom frequency marking.The second, integrated filtering absorbs the integrated design of bubble employing, and original optical filtering bubble and absorption bubble are integrated into a bubble, is beneficial to the miniaturization of microwave cavity bulb apparatus; Three, microwave cavity adopts the TE011 mould design of cylindrical cavity, the quality factor Q value height, and another advantage of TE011 mould is not have axial current, like this, even two ports of cylindrical cavity are owing to the chamber not driving fit of tube of uncapping and logical grating causes, also can not cut off microwave electric field and cause electromagnetic consumable, instant microwave electric field and atomic interaction and stimulated radiation feedback; Four, heater strip adopts twisted pair design, and the direction of routing of thermistor is that cavity is axial, has eliminated the magnetic field longitudinal component that heating current produced basically, has avoided the deterioration of the remanent magnetism of temperature control parts to the atomic frequency standard index.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. microwave cavity bulb apparatus, comprise that integrated filtering absorbs bubble (1), microwave cavity (2), photocell, temperature control parts, magnetic induction loop (6), magnetic cup and printed board (8), described integrated filtering absorbs bubble (1) and is positioned at described microwave cavity (2), described magnetic cup is arranged on outside the described microwave cavity (2), and described temperature control parts are installed on the described microwave cavity (2); It is characterized in that,
Described microwave cavity (2) comprises chamber lid (9), cavity (10) and coupling loop (12), and the middle part of described chamber lid (9) is provided with logical grating (22); Described coupling loop (12) is fixed on the described chamber lid (9) and is positioned on the central axis of described chamber lid (9); Described photocell and printed board (8) are installed on the described chamber lid (9); Described magnetic induction loop (6) is located at described cavity (10) periphery; Described integrated filtering absorbs between the bottom of steeping (1) and described cavity (10) and is folded with support component (13), and the coefficient of expansion of described support component (13) is greater than the coefficient of expansion of described microwave cavity (2).
2. microwave cavity bulb apparatus as claimed in claim 1, it is characterized in that, described temperature control parts comprise thermistor (4) and heater strip (5), and described thermistor (4) is installed on the described chamber lid (9), and the direction of routing of described thermistor (4) is described cavity (a 10) axis direction; The sidewall of described cavity (10) is provided with groove, and described heater strip (5) adopts the twisted-pair feeder form and is looped around in the described groove.
3. microwave cavity bulb apparatus as claimed in claim 1 is characterized in that, the inwall that described integrated filtering absorbs bubble (1) scribbles paraffin layer.
4. microwave cavity bulb apparatus as claimed in claim 1, it is characterized in that, described magnetic cup comprises interior magnetic cup (19), outer magnetic cup (20) and base (15), be respectively equipped with the draw-in groove (23) that is used to place described interior magnetic cup (19), outer magnetic cup (20) and microwave cavity (2) on the described base (15), described interior magnetic cup (19) is positioned between described microwave cavity (2) and the described outer magnetic cup (20).
5. microwave cavity bulb apparatus as claimed in claim 4 is characterized in that, is provided with first fixture (21a) between described chamber lid (9) and the described interior magnetic cup (19), is provided with second fixture (21b) between described interior magnetic cup (19) and the described outer magnetic cup (20).
6. microwave cavity bulb apparatus as claimed in claim 1 is characterized in that, described magnetic induction loop (6) comprises magnetic induction coil tube (16) and is wound on the outer double-layer coil (17) of described magnetic induction coil tube (16).
7. microwave cavity bulb apparatus as claimed in claim 1 is characterized in that, described microwave cavity (2) adopts the TE011 mould design of cylindrical cavity.
8. microwave cavity bulb apparatus as claimed in claim 7 is characterized in that, described photocell comprises photocell (3a) and photocell (3b), and described photocell (3a) and photocell (3b) symmetry are positioned over the both sides of described coupling loop (12).
9. as each described microwave cavity bulb apparatus of claim 1-8, it is characterized in that described chamber lid (9) is provided with tuning screw (11).
10. as each described microwave cavity bulb apparatus of claim 1-8, it is characterized in that, comprise that also being arranged at described integrated filtering absorbs the base plate (14) that steeps between (1) and the described support component (13).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110183261 CN102299714B (en) | 2011-06-30 | 2011-06-30 | Microwave cavity bubble device |
| PCT/CN2011/076826 WO2013000176A1 (en) | 2011-06-30 | 2011-07-04 | Microwave cavity bubble device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110183261 CN102299714B (en) | 2011-06-30 | 2011-06-30 | Microwave cavity bubble device |
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| CN102299714A true CN102299714A (en) | 2011-12-28 |
| CN102299714B CN102299714B (en) | 2013-05-08 |
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| CN 201110183261 Expired - Fee Related CN102299714B (en) | 2011-06-30 | 2011-06-30 | Microwave cavity bubble device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103063650A (en) * | 2012-12-17 | 2013-04-24 | 江汉大学 | Improved atomic ground state energy detection device |
| CN103076746A (en) * | 2012-12-17 | 2013-05-01 | 江汉大学 | Wall shift measurement system and control method thereof |
| CN104410412A (en) * | 2014-10-10 | 2015-03-11 | 中国科学院武汉物理与数学研究所 | Dual-bubble microwave cavity for rubidium frequency scale |
| CN105446121A (en) * | 2015-12-10 | 2016-03-30 | 江汉大学 | Physical system |
| CN105846820A (en) * | 2016-03-21 | 2016-08-10 | 中国科学院武汉物理与数学研究所 | Pseudo-double-bubble device used for rubidium atom frequency standard |
| CN106129573A (en) * | 2016-08-19 | 2016-11-16 | 中国科学院武汉物理与数学研究所 | A kind of New type atom frequency marking microwave cavity |
| CN107677887A (en) * | 2017-09-25 | 2018-02-09 | 江汉大学 | A kind of frequency displacement measurement apparatus based on storage bubble |
| CN108227465A (en) * | 2017-12-21 | 2018-06-29 | 中国科学院国家授时中心 | A kind of pulse laser pumping rubidium clock physical system of low temperature sensibility |
| CN112332840A (en) * | 2021-01-05 | 2021-02-05 | 中国科学院精密测量科学与技术创新研究院 | Subminiature atomic frequency standard microwave cavity based on microstrip line structure |
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| CN103076746A (en) * | 2012-12-17 | 2013-05-01 | 江汉大学 | Wall shift measurement system and control method thereof |
| CN103076746B (en) * | 2012-12-17 | 2016-03-30 | 江汉大学 | A kind of control method of wall shift measurement system |
| CN103063650A (en) * | 2012-12-17 | 2013-04-24 | 江汉大学 | Improved atomic ground state energy detection device |
| CN104410412A (en) * | 2014-10-10 | 2015-03-11 | 中国科学院武汉物理与数学研究所 | Dual-bubble microwave cavity for rubidium frequency scale |
| CN104410412B (en) * | 2014-10-10 | 2017-05-17 | 中国科学院武汉物理与数学研究所 | Dual-bubble microwave cavity for rubidium frequency scale |
| CN105446121A (en) * | 2015-12-10 | 2016-03-30 | 江汉大学 | Physical system |
| CN105846820B (en) * | 2016-03-21 | 2018-08-24 | 中国科学院武汉物理与数学研究所 | A kind of double bulb apparatus of puppet for Rb atom frequency marking |
| CN105846820A (en) * | 2016-03-21 | 2016-08-10 | 中国科学院武汉物理与数学研究所 | Pseudo-double-bubble device used for rubidium atom frequency standard |
| CN106129573A (en) * | 2016-08-19 | 2016-11-16 | 中国科学院武汉物理与数学研究所 | A kind of New type atom frequency marking microwave cavity |
| CN107677887A (en) * | 2017-09-25 | 2018-02-09 | 江汉大学 | A kind of frequency displacement measurement apparatus based on storage bubble |
| CN108227465A (en) * | 2017-12-21 | 2018-06-29 | 中国科学院国家授时中心 | A kind of pulse laser pumping rubidium clock physical system of low temperature sensibility |
| CN108227465B (en) * | 2017-12-21 | 2019-10-18 | 中国科学院国家授时中心 | A kind of pulse laser pumping rubidium clock physical system of low temperature sensibility |
| CN112332840A (en) * | 2021-01-05 | 2021-02-05 | 中国科学院精密测量科学与技术创新研究院 | Subminiature atomic frequency standard microwave cavity based on microstrip line structure |
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