CN202757998U - Atom Zeeman frequency measuring instrument - Google Patents

Atom Zeeman frequency measuring instrument Download PDF

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CN202757998U
CN202757998U CN 201220379180 CN201220379180U CN202757998U CN 202757998 U CN202757998 U CN 202757998U CN 201220379180 CN201220379180 CN 201220379180 CN 201220379180 U CN201220379180 U CN 201220379180U CN 202757998 U CN202757998 U CN 202757998U
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atom
module
radiofrequency signal
microwave cavity
light
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雷海东
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Jianghan University
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Jianghan University
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Abstract

The utility model discloses an atom Zeeman frequency measuring instrument, belonging to the atom frequency marking field. The measuring instrument comprises an optical radiation module used for making atoms generate radiant light, wherein spectral lines of the radiant light comprise two hyperfine structure components; a filtering module used for employing atom isotope to filter one of the two hyperfine structure components to obtain filtered radiant light; a split transition module used for making atoms in a microwave cavity split and generate resonance transition under the radiation of the filtered radiant light and through magnetic field and radiofrequency signal effects, wherein the atoms in the microwave cavity and the atoms in the optical radiation module are of a same kind; an optical inspection module used for performing real-time detection on intensity of radiant light permeating the split transition module and generating light intensity signals; and a master control calculating module used for providing radiofrequency signals for the microwave cavity, obtaining atom absorption lines in dependence on corresponding relation between the radiofrequency signals and the light intensity signals and calculating atom ground state hyperfine Zeeman frequency in dependence on the absorption lines.

Description

A kind of measuring instrument of atom Zeeman frequency
Technical field
The utility model relates to the atomic frequency standard field, particularly a kind of measuring instrument of atom Zeeman frequency.
Background technology
Zeeman effect is atom externally under the magnetic fields, and the phenomenon of division occurs energy level.After atom generation Zeeman effect, the jump frequency between the hyperfine energy level of ground state is called as the hyperfine Zeeman frequency of atomic ground state.
Along with the widespread use of Rb atom frequency marking, usually need measure the hyperfine Zeeman frequency of rubidium atomic ground state, with as atomic clock quantum frequency discrimination reference frequency value.The existing method of measuring the hyperfine Zeeman frequency of rubidium atomic ground state comprises: will fill with 87The glass envelope of Rb is inserted in the microwave cavity that is added with magnetic field, and the resonant frequency in chamber is adjusted at 87On the corresponding hyperfine levels transition frequency of Rb ground state, then detect measuring instrument by microwave and obtain 87The absorption line of Rb can obtain the hyperfine Zeeman frequency of rubidium atomic ground state according to this absorption line.
In realizing process of the present utility model, the inventor finds that there is following problem at least in prior art:
Because gaseous state 87The Rb population density is little, the population difference of two hyperfine energy inter-stages that use existing measuring method to obtain when normal temperature is very little, so the Atomic absorption spectral line that obtains is very faint, there is certain error according to the hyperfine Zeeman frequency of the measured rubidium atomic ground state of this absorption line.
The utility model content
In order to improve the degree of accuracy of measuring the Zeeman frequency, the utility model embodiment provides a kind of measuring instrument of atom Zeeman frequency.Described technical scheme is as follows:
A kind of measuring instrument of atom Zeeman frequency, described measuring instrument comprises:
Be used for making atom to produce the optical radiation module of radiant light; The spectral line of described radiant light comprises two hyperfine structure compositions;
Be used for adopting of described two the hyperfine structure compositions of isotope filtering of described atom, the filtering module of the radiant light after obtaining filtering;
Be used under the irradiation of the radiant light after the described filtration, by the effect of magnetic field and radiofrequency signal, make the atom in the microwave cavity division occur and produce the division transition module of resonant transition; Atom in atom in the described microwave cavity and the described optical radiation module is the same atom;
Be used for detecting in real time the radiation light intensity that sees through described division transition module, and produce the light inspection module of light intensity signal;
Be used to described microwave cavity that described radiofrequency signal is provided, corresponding relation according to described radiofrequency signal and described light intensity signal, obtain the absorption line of described atom, and calculate the master control computing module of the hyperfine Zeeman frequency of ground state of described atom according to described absorption line;
Wherein, described division transition module respectively with described light inspection module be connected the master control computing module and be connected.
Particularly, described optical radiation module is 87The Rb spectrum lamp; Described filtering module is 85The Rb bubble that filters; Described division transition module comprises described microwave cavity and is placed in the described microwave cavity 87Rb absorbs bubble; The outer coiling of described microwave cavity produces the hot-wire coil in described magnetic field.
Wherein, described master control computing module specifically comprises:
Be used for exporting and recording the radiofrequency signal generation unit of described radiofrequency signal;
For generation of the current generating unit of electric current with the size of controlling described magnetic field;
Be used for sampling and record according to the described light intensity signal of time ordered pair of the described radiofrequency signal of output, make one to one sampling unit of described light intensity signal and described radiofrequency signal;
Be used for the corresponding relation according to described light intensity signal and described radiofrequency signal, obtain the absorption line that described atom pair is answered, and calculate and show the computing unit of the hyperfine Zeeman frequency of described atomic ground state that calculates according to described absorption line;
Wherein, described radiofrequency signal generation unit respectively with described division transition module be connected computing unit and be connected; Described current generating unit respectively with described division transition module be connected computing unit and be connected; Described sampling unit respectively with described light inspection module be connected computing unit and be connected.
Further, described radiofrequency signal generation unit is sweep generator; The variation range of described radiofrequency signal is 6832.6875MHz～6836.6875MHz, and step-length is 500Hz.
Further, the size in described magnetic field is in 100mG.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is: close by utilizing between the atom isotope energy level transition frequency, adopt in two hyperfine structure compositions of isotope filtering atom of atom; With filtering the radiant light irradiating microwaves chamber Atom of atom of two hyperfine structure compositions, and the effect by magnetic field and radiofrequency signal makes atom that division and resonant transition occur, the particle that has increased between the hyperfine energy level of atom is poor; Can obtain stronger light intensity signal, reduce to measure the error of Zeeman frequency, improve the degree of accuracy of measuring the Zeeman frequency.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the synoptic diagram of the measuring instrument of a kind of atom Zeeman frequency of providing among the utility model embodiment 1;
Fig. 2 is the synoptic diagram of the measuring instrument of a kind of atom Zeeman frequency of providing among the utility model embodiment 2;
Fig. 3 provides among the utility model embodiment 2 87The synoptic diagram of Rb atomic energy level;
Fig. 4 provides among the utility model embodiment 2 85The synoptic diagram of Rb atomic energy level;
Fig. 5 provides among the utility model embodiment 2 87The a of the D1 line of Rb, b line with 85The synoptic diagram of the A of the D1 line of Rb, the relative position of B line;
Fig. 6 is the synoptic diagram of hyperfine structure composition in the radiant light after the filtration that provides among the utility model embodiment 2;
Fig. 7 is the synoptic diagram of the absorption line that provides among the utility model embodiment 2.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model embodiment is described in further detail.
Embodiment 1
Referring to Fig. 1, the utility model embodiment 1 provides a kind of measuring instrument of atom Zeeman frequency, and this measuring instrument comprises: optical radiation module 101, filtering module 102, division transition module 103, light inspection module 104 and master control computing module 105.
Optical radiation module 101 is used for making atom to produce radiant light, and the spectral line of this radiant light comprises two hyperfine structure compositions.
Filtering module 102, of two hyperfine structure compositions of isotope filtering who be used for to adopt atom, the radiant light after obtaining filtering.
Division transition module 103 is used under the irradiation of the radiant light after the filtration, by the effect of magnetic field and radiofrequency signal, makes the microwave cavity Atom that division and generation resonant transition occur.
Wherein, the atom in microwave cavity Atom and the optical radiation module 101 is the same atom.
Light inspection module 104 is used for detecting in real time the radiation light intensity that sees through division transition module 103, and produces light intensity signal.
Master control computing module 105 is used to microwave cavity that radiofrequency signal is provided, and according to the corresponding relation of radiofrequency signal and light intensity signal, obtains the absorption line of atom, and calculates the hyperfine Zeeman frequency of ground state of atom according to absorption line.
Wherein, division transition module 103 is connected with the master control computing module with light inspection module 104 respectively and is connected.
Particularly, optical radiation module 101 can be 87The Rb spectrum lamp; Filtering module 102 can be 85The Rb bubble that filters; Division transition module 103 comprises microwave cavity and is placed in the microwave cavity 87Rb absorbs bubble; The outer coiling of this microwave cavity produces the hot-wire coil in magnetic field.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is: close by utilizing between the atom isotope energy level transition frequency, adopt in two hyperfine structure compositions of isotope filtering atom of atom; With filtering the radiant light irradiating microwaves chamber Atom of atom of two hyperfine structure compositions, and the effect by magnetic field and radiofrequency signal makes atom that division and resonant transition occur, the particle that has increased between the hyperfine energy level of atom is poor; Can obtain stronger light intensity signal, reduce to measure the error of Zeeman frequency, improve the degree of accuracy of measuring the Zeeman frequency.
Embodiment 2
Referring to Fig. 2, the utility model embodiment 2 with 87The Rb atom is example, and a kind of measuring instrument of atom Zeeman frequency is provided, and this measuring instrument comprises: optical radiation module 201, filtering module 202, division transition module 203, light inspection module 204 and master control computing module 205.Wherein, division transition module 203 is connected with the master control computing module with light inspection module 204 respectively and is connected.
Optical radiation module 201 is used for making atom to produce radiant light, and the spectral line of this radiant light comprises two hyperfine structure compositions.
Wherein, these two hyperfine structure compositions are respectively, the hyperfine structure composition of the transition spectral line in the hyperfine structure composition of the transition spectral line in the excited state of rubidium atom and the ground state between the higher hyperfine structure energy level and the excited state of rubidium atom and the ground state between the lower hyperfine structure energy level.In the utility model embodiment 2, the hyperfine structure composition of the transition spectral line in the hyperfine structure composition of the transition spectral line in the excited state of setting rubidium atom and the ground state between the superb fine-structure energy levels and the excited state of rubidium atom and the ground state between the low hyperfine structure energy level is respectively a line and b line.
Particularly, optical radiation module 201 for generation of 87The radiant light of Rb atom.Particularly, optical radiation module 201 is 87The Rb spectrum lamp. 7The Rb spectrum lamp is made the clear glass shape; Wherein be filled with corresponding illuminating 87Rb steam and the Kr or the Ar inert gas that make things convenient for starter.
Filtering module 202, of two hyperfine structure compositions of isotope filtering who be used for to adopt atom, the radiant light after obtaining filtering.
Wherein, with in the optical radiation module 201 87In the radiant light irradiation filtering module 202 of Rb atom 85Rb obtains in two hyperfine structure compositions of filtering one 87The radiant light of Rb atom.Particularly, be a line by one in two hyperfine structure compositions of filtering.In addition, filter element 2012 is 85Rb absorbs bubble.Should 85Rb absorbs infusion and becomes the clear glass shape, wherein is filled with 87The isotope of Rb atom 85Rb.As everyone knows, 87Rb atom (atomic number 37) has atomic weight to be respectively two kinds of isotopes of 85 and 87.Because optical radiation module 201 has been selected 87The Rb steam is so be filled with in filtering module 202 85The Rb atom.
Further, 87Rb is alkaline metal, only has a valence electron.Referring to Fig. 3, 87The ground state of Rb atom is 5 2S 1/2Attitude. 87In the ground state level of Rb atom, | F=2, m F=0〉and | F=1, m F=0 〉, the exact value of jump frequency is 6834.68XXXXMHz (external magnetic field H=0) between these two energy levels, and rear 4-digit number is determined by the perturbation of the buffer gas in magnetic field and the integrated filtering resonance bubble.This is so-called Rb atom frequency marking quantum frequency discrimination reference frequency value namely. 87The first excited state of Rb has two fine-structure energy levels 5 2P 3/2With 5 2P 1/2, the hyperfine splitting of these two energy levels is little than ground state, is respectively 840MHz (F=3 and F=0) and 430MHz (F=2 and F=1).Because it is few that dopplerbroadening divides value difference therewith, so the hyperfine structure of excited state can't be differentiated.Therefore 87The first excited state of Rb atom and the transition spectral line between ground state include only D 1And D 2Two hyperfine structure composition a lines and b line in the line.
Referring to Fig. 4, 85The ground state 5 of Rb atom 2P 1/2Energy level is divided into two hyperfine energy level F=3 and F=2, and jump frequency is approximately 3036MHz between these two energy levels.Its spectrum equally also has D 1Line
Figure BDA00001963808500051
And D 2Line And every line comprises two hyperfine composition A lines and B line equally.Referring to Fig. 5～Fig. 6, a line, A line are at a distance of nearer, and b line, B line apart from each other are so work as 87The Rb radiant light is through in the filter unit 2012 85After Rb filters, the D of radiant light 1, D 2A line in the line is filtered, and basically only can be left two lines of b, B.
Division transition module 203 is used under the irradiation of the radiant light after the filtration, by the effect of magnetic field and radiofrequency signal, makes the microwave cavity Atom that division and generation resonant transition occur.
Wherein, the atom in microwave cavity Atom and the optical radiation module 101 is the same atom.
Further, be filled with in the microwave cavity 87Rb atom and inert gas.The outer coiling of this microwave cavity can produce the hot-wire coil in magnetic field.Alternatively, hot-wire coil can be by the spiral pipe coiling.In the microwave cavity 87The Rb atom is under magnetic fields, and ground state will divide, and obtains the hyperfine structure of ground state.Under the radiant light irradiation that filters out a line, the hyperfine structure of ground state will be pumped into excited state by the b line.And under the effect of radiofrequency signal, between the hyperfine structure of ground state resonant transition will occur.
Particularly, filter out a line 87After the radiant light of Rb atom arrives microwave cavity, in the microwave cavity 87If being on the energy level of ground state F=1, the Rb atom will be pumped into 5 by the b line 2P 3/2Or 5 2P 1/2Energy level gets on, but lifetime of excited state is very short, and they are very fast can spontaneous radiation return ground state again.Because during excited state, collision is so that excited state fully mixes, the probability of falling F=2 energy level and F=1 energy level when returning ground state can be considered equal.But because the existence of b beta radiation light can be pumped into 5 again as long as atom is fallen on the F=1 energy level 2P 3/2Or 5 2P 1/2Energy level gets on; And owing to there be not exciting of radiant light, the atom that drops on the F=2 energy level is parked on this energy level.End product must be atom all is pumped on the F=2 energy level (actual is that whole atoms is evenly distributed on five energy levels of hyperfine structure mF of F=2, the atomicity of every sub-energy level be whole atomicities 1/5), the energy level of F=1 is evacuated.Like this, F=2 and F=1 energy level are through the effect of radiant light, and population difference has increased.In microwave cavity 87After three sub-energy levels of Zeeman of the F=1 of Rb atom are evacuated, 87The Rb atom is radiation-absorbing light no longer just.That is to say, when radiant light has just begun to shine 87During Rb atom microwave cavity will by 87Rb absorbs, in case but the F=1 energy level be evacuated, then no longer be absorbed, namely reach balance after, in the microwave cavity 87Rb is transparent to radiant light.At this moment add the upper frequency radiofrequency signal identical with the atomic transition frequency at microwave cavity, allow atom exist | F=2, m F=0〉and | F=1, m F=0〉these two energy inter-stage generation magnetic resonance, like this with regard to some atom from | F=2, m F=0〉transit to | F=1, m F=0〉on the energy level.As long as there is the energy jump of a microwave quantum of an atomic radiation to arrive | F=1, m F=0〉on the energy level, the energy that just at once can absorb again a light quantum is excited to excited state, thereby so that the radiant light light intensity by microwave cavity die down.
Light inspection module 204 is used for detecting in real time the light intensity of the radiant light that sees through division transition module 203, and produces light intensity signal.
Particularly, light inspection module 204 includes but not limited to the circuit into photoelectric cell, amplifying circuit and analog to digital conversion circuit formation.Photoelectric cell is arranged on the bottom of aforementioned microwave cavity, is used for detecting and recording in real time the light intensity of radiant light, and the generation detection signal is sent to amplifying circuit; Amplifying circuit is used for and will be sent to analog to digital conversion circuit after the photronic detection signal amplification; Detection signal after analog to digital conversion circuit will amplify converts light intensity signal to.
Master control computing module 205 is used to microwave cavity that radiofrequency signal is provided, and according to the corresponding relation of radiofrequency signal and light intensity signal, obtains the absorption line of atom, and calculates the hyperfine Zeeman frequency of ground state of atom according to absorption line.
Further, main control module 205 comprises radiofrequency signal generation unit 2051, current generating unit 2052, sampling unit 2053 and computing unit 2054.Wherein, radiofrequency signal generation unit 2051 is connected with computing unit with division transition module 203 respectively and is connected; Current generating unit 2052 is connected with computing unit with division transition module 203 respectively and is connected; Sampling unit 2053 is connected with computing unit with light inspection module 204 respectively and is connected.
Wherein, radiofrequency signal generation unit 2051 is used for output and record radiofrequency signal.Further, radiofrequency signal generation unit 2051 includes but not limited to be sweep generator.
Wherein, current generating unit 2052 is for generation of the size of electric current with controlling magnetic field.Particularly, current generating unit 2052 produces and controls with the size of current in the spiral pipe coiling, and then the controlling magnetic field size, and keeps constant.
Wherein, sampling unit 2053 be used for according to radiofrequency signal generation unit 2051 control radiofrequency signals the time ordered pair light inspection module 204 outputs light intensity signal sample and record, make light intensity signal corresponding one by one with radiofrequency signal.
Wherein, computing unit 2054 is used for obtaining corresponding absorption line according to the light intensity signal of sampling and the corresponding relation of radiofrequency signal, and calculates and show the hyperfine Zeeman Zeeman of the ground state frequency of the atom that calculates according to absorption line.
Particularly, referring to Fig. 7, ordinate has represented the light intensity signal of sampling, i.e. sample size, and unit be volt; Horizontal ordinate has represented number of scan points, and namely the exporting change frequency of radiofrequency signal generation unit 2051 records counts.Wherein, the Zeeman frequency is defined as the frequency difference at 3 at peak 1 in the absorption line, peak 2 or peak 1, peak, the difference between the frequency values of the radiofrequency signal that the frequency values of the radiofrequency signal that namely minimum light intensity signal is corresponding is corresponding with inferior little light intensity signal.Particularly, be constant because the frequency signal of radiofrequency signal generation unit 2051 outputs changes stepping length, so can by calculating counting between peak 1, peak 2 or peak 1, the peak 3, can obtain the value of Zeeman frequency.
The below with 87The Rb atom is example, the measuring instrument that adopts the utility model embodiment 2 to provide simply is provided is measured 87The method of Rb atom Zeeman frequency specifically comprises 301～305:
301: make atom produce radiant light, the spectral line of this radiant light comprises two hyperfine structure compositions.
Particularly, can use 87The radiant light of Rb steam and the Kr that makes things convenient for starter or Ar inert gas generation rubidium atom.
302: adopt in two hyperfine structure compositions of isotope filtering of atom, the radiant light after obtaining filtering.
Wherein, with the isotope of the radiant light of rubidium atom irradiation rubidium atom, obtain filtering out the radiant light of the rubidium atom of a line, remaining b line in the radiant light.
303: under the irradiation of the radiant light after the filtration, by the effect of magnetic field and radiofrequency signal, make the microwave cavity Atom that division and generation resonant transition occur.
Wherein, the atom in the microwave cavity is the same atom with the atom that produces radiant light.
Wherein, at first, in microwave cavity, be filled with 87Rb rubidium atom and inert gas; Then, the magnetic field for microwave cavity is provided for dividing makes in the microwave cavity 87The Rb atomic ground state is split into the hyperfine energy level of ground state; Secondly, the radiant light irradiation after filtering has added the microwave cavity in the magnetic field, will make in the microwave cavity 87The hyperfine energy level generation pumping corresponding with the b line in the Rb atomic ground state; At last, for the microwave cavity input radiofrequency signal identical with the jump frequency of rubidium atom, make the hyperfine structure of rubidium atomic ground state under the excitation of radiofrequency signal, produce resonant transition.
Particularly, the variation range of radiofrequency signal is 6832.6875MHz～6836.6875MHz, and step-length is 500Hz.The size in magnetic field is in 100mG.
304: be used for detecting in real time and record the radiation light intensity that sees through microwave cavity, and produce light intensity signal.
Particularly, can be detected by photoelectric cell the light intensity of radiant light, and detection signal is sent to amplifying circuit; Amplifying circuit is sent to analog to digital conversion circuit after detection signal is amplified; Detection signal after analog to digital conversion circuit will amplify converts light intensity signal to.
305: according to the corresponding relation of radiofrequency signal and light intensity signal, obtain the absorption line of atom, and calculate the hyperfine Zeeman frequency of ground state of atom according to absorption line.
Further, this step comprises:
3051: in absorption line, obtain respectively the frequency values of radiofrequency signal corresponding to the frequency values of radiofrequency signal corresponding to minimum light intensity signal and inferior little light intensity signal.
Particularly, referring to Fig. 7, the frequency values of the radiofrequency signal that minimum light intensity signal is corresponding is the frequency values of peak 1 correspondence in the absorption line; The frequency values of the radiofrequency signal that inferior little light intensity signal is corresponding is the frequency values of peak 2 or peak 3 correspondences in the absorption line.
3052: the difference between the frequency values of the radiofrequency signal that the frequency values that calculates radiofrequency signal corresponding to minimum light intensity signal is corresponding with inferior little light intensity signal obtains the hyperfine Zeeman frequency of ground state of atom.
Particularly, calculate the frequency difference at 3 at peak 1, peak 2 or peak 1 in the absorption line, peak, namely obtain the hyperfine Zeeman frequency of ground state of atom.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is: close by utilizing between the atom isotope energy level transition frequency, adopt in two hyperfine structure compositions of isotope filtering atom of atom; With filtering the radiant light irradiating microwaves chamber Atom of atom of two hyperfine structure compositions, and the effect by magnetic field and radiofrequency signal makes atom that division and resonant transition occur, the particle that has increased between the hyperfine energy level of atom is poor; Can obtain stronger light intensity signal, reduce to measure the error of Zeeman frequency, improve the degree of accuracy of measuring the Zeeman frequency.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (5)

1. the measuring instrument of an atom Zeeman frequency is characterized in that, described measuring instrument comprises:
Be used for making atom to produce the optical radiation module of radiant light; The spectral line of described radiant light comprises two hyperfine structure compositions;
Be used for adopting of described two the hyperfine structure compositions of isotope filtering of described atom, the filtering module of the radiant light after obtaining filtering;
Be used under the irradiation of the radiant light after the described filtration, by the effect of magnetic field and radiofrequency signal, make the atom in the microwave cavity division occur and produce the division transition module of resonant transition; Atom in atom in the described microwave cavity and the described optical radiation module is the same atom;
Be used for detecting in real time the radiation light intensity that sees through described division transition module, and produce the light inspection module of light intensity signal;
Be used to described microwave cavity that described radiofrequency signal is provided, corresponding relation according to described radiofrequency signal and described light intensity signal, obtain the absorption line of described atom, and calculate the master control computing module of the hyperfine Zeeman frequency of ground state of described atom according to described absorption line;
Wherein, described division transition module respectively with described light inspection module be connected the master control computing module and be connected.
2. measuring instrument according to claim 1 is characterized in that, described optical radiation module is 87The Rb spectrum lamp; Described filtering module is 85The Rb bubble that filters; Described division transition module comprises described microwave cavity and is placed in the described microwave cavity 87Rb absorbs bubble; The outer coiling of described microwave cavity produces the hot-wire coil in described magnetic field.
3. measuring instrument according to claim 1 is characterized in that, described master control computing module specifically comprises:
Be used for exporting and recording the radiofrequency signal generation unit of described radiofrequency signal;
For generation of the current generating unit of electric current with the size of controlling described magnetic field;
Be used for sampling and record according to the described light intensity signal of time ordered pair of the described radiofrequency signal of output, make one to one sampling unit of described light intensity signal and described radiofrequency signal;
Be used for the corresponding relation according to described light intensity signal and described radiofrequency signal, obtain the absorption line that described atom pair is answered, and calculate and show the computing unit of the hyperfine Zeeman frequency of described atomic ground state that calculates according to described absorption line;
Wherein, described radiofrequency signal generation unit respectively with described division transition module be connected computing unit and be connected; Described current generating unit respectively with described division transition module be connected computing unit and be connected; Described sampling unit respectively with described light inspection module be connected computing unit and be connected.
4. measuring instrument according to claim 3 is characterized in that, described radiofrequency signal generation unit is sweep generator; The variation range of described radiofrequency signal is 6832.6875MHz～6836.6875MHz, and step-length is 500Hz.
5. measuring instrument according to claim 3 is characterized in that, the size in described magnetic field is in 100mG.
CN 201220379180 2012-07-31 2012-07-31 Atom Zeeman frequency measuring instrument Expired - Fee Related CN202757998U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102788900A (en) * 2012-07-31 2012-11-21 江汉大学 Atomic ground state hyperfine Zeeman frequency measuring device and method
CN114114094A (en) * 2020-08-31 2022-03-01 华中科技大学 High-frequency microwave frequency measurement method and system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102788900A (en) * 2012-07-31 2012-11-21 江汉大学 Atomic ground state hyperfine Zeeman frequency measuring device and method
CN102788900B (en) * 2012-07-31 2015-03-18 江汉大学 Atomic ground state hyperfine Zeeman frequency measuring device and method
CN114114094A (en) * 2020-08-31 2022-03-01 华中科技大学 High-frequency microwave frequency measurement method and system

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