CN205377843U - Spectrum profile correction system - Google Patents
Spectrum profile correction system Download PDFInfo
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- CN205377843U CN205377843U CN201620102883.1U CN201620102883U CN205377843U CN 205377843 U CN205377843 U CN 205377843U CN 201620102883 U CN201620102883 U CN 201620102883U CN 205377843 U CN205377843 U CN 205377843U
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Abstract
The utility model discloses a spectrum profile correction system, wherein, the system includes at least: the spectroscopic lamp for produce the pumping light, the resonant cavity is arranged in in the light path of pumping light, the light filter is fixed in the spectroscopic lamp with between the resonant cavity, integrated resonance bubble and the photocell of filtering, integrated filter the resonance bubble with the photocell is all arranged in in the resonant cavity, the microwave is sought the signal and is produced the circuit, with the resonant cavity is connected, microprocessor, respectively with the spectroscopic lamp the photocell with the microwave is sought the signal and is produced circuit connection. The utility model discloses the effectual elimination that has realized the optical frequency shift has simple structure extensive applicability's characteristics.
Description
Technical field
This utility model belongs to technical field, particularly to a kind of spectral profile update the system.
Background technology
In actual Rb atom frequency marking, pumping light is not monochromatic light, but has the superposition of a plurality of spectral line of certain live width and linear function.Within the scope of pumping light optical lineshape function, some frequency component produces positive optical frequency shift, and another part frequency component produces negative optical frequency shift.The frequency displacement of the 0-0 transition that this nonmonochromatic light causes is the superposition of the frequency displacement that many monochromatic light cause.Therefore, to Rb atom frequency marking, keep the spectrum line style of pumping light and light intensity constant, be critically important on reducing optical frequency shift on the impact of frequency marking aging drift.In consideration of it, how to propose a kind of system eliminating optical frequency shift, it is that this utility model continues to solve the technical problem that.
Utility model content
This utility model provides a kind of spectral profile update the system, solves or part solves above-mentioned technical problem of the prior art.
According to an aspect of the present utility model, it is provided that a kind of spectral profile update the system, including: spectral lamp, it is used for producing pumping light；Resonator cavity, is placed in the light path of described pumping light, to receive described pumping light；Optical filter, is fixed between described spectral lamp and described resonator cavity, so that the pumping light in described light path is carried out optical filtering process by described optical filter；Integrated filtering resonance bubble and light cell, described integrated filtering resonance bubble and described light cell are placed in described resonator cavity；Microwave seeks signal generating circuit, is connected with described resonator cavity；Microprocessor, seeks signal generating circuit with described spectral lamp, described light cell and described microwave respectively and is connected.
Optionally, also including: the first thermostatic control module, described first thermostatic control module is connected with described spectral lamp.
Optionally, also including: the second thermostatic control module, described second thermostatic control module is connected with described integrated filtering resonance bubble.
Beneficial effect:
A kind of spectral profile update the system that this utility model provides, by being placed in the light path of described pumping light, to receive described pumping light by resonator cavity；And optical filter is fixed between described spectral lamp and described resonator cavity, so that the pumping light in described light path is carried out optical filtering process by described optical filter；Meanwhile, described integrated filtering resonance bubble and described light cell are placed in described resonator cavity；Microwave seeks signal generating circuit, is connected with described resonator cavity；Microprocessor, seeks signal generating circuit with described spectral lamp, described light cell and described microwave respectively and is connected.Effectively achieve the elimination to optical frequency shift, have the advantages that the simple in construction suitability is wide.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the spectral profile update the system that Fig. 1 provides for this utility model embodiment；
The schematic flow sheet of the method for eliminating optical frequency shift that Fig. 2 provides for this utility model embodiment；
The schematic flow sheet of the device for eliminating optical frequency shift that Fig. 3 provides for this utility model embodiment；
Fig. 4 is the linear relationship schematic diagram of integrated filtering resonance bubble temperature and difference frequency in this utility model embodiment；
Fig. 5 is sequential process schematic in this utility model embodiment；
Fig. 6 is that in this utility model embodiment, pulse pumping light produces principle schematic.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain, broadly fall into the scope of this utility model protection；Wherein involved in this enforcement "and/or" key word, represent and or two kinds of situations, in other words, A and/or B mentioned by this utility model embodiment, illustrates A and B, two kinds of situations of A or B, describes three kinds of states existing for A and B, such as A and/or B, expression: only include A and do not include B；Only include B and do not include A；Including A and B.
Meanwhile, in this utility model embodiment, when assembly is referred to as " being fixed on " another assembly, it can directly on another assembly or can also there is assembly placed in the middle.When an assembly is considered as " connection " another assembly, it can be directly to another assembly or may be simultaneously present assembly placed in the middle.When an assembly is considered as " being arranged at " another assembly, it can be set directly on another assembly or may be simultaneously present assembly placed in the middle.The term " vertical ", " level ", "left", "right" and the similar statement that use in this utility model embodiment are merely for purposes of illustration, and are not intended to restriction this utility model.
Referring to Fig. 1, this utility model embodiment provides a kind of spectral profile update the system, including: spectral lamp 101, it is used for producing pumping light；Resonator cavity 102, is placed in the light path of described pumping light, to receive described pumping light；Optical filter 103, is fixed between described spectral lamp 101 and described resonator cavity 102, so that the pumping light in described light path is carried out optical filtering process by described optical filter 103；Integrated filtering resonance bubble 104 and light cell 105, described integrated filtering resonance bubble 104 and described light cell 105 are placed in described resonator cavity 102；Microwave seeks signal generating circuit 106, is connected with described resonator cavity 102；Microprocessor 107, seeks signal generating circuit 106 with described spectral lamp 101, described light cell 105 and described microwave respectively and is connected.
Specifically, a Rb atom frequency marking adjusted, the optical frequency shift of its quantum physics part can set to zero, so its frequency is just insensitive to the minor variations of pump intensity.But, actually the size of optical frequency shift is not only directly proportional to the pump intensity being irradiated on absorption bubble, and very close with the line shape function relation being irradiated to the pumping light spectral line absorbed on bubble: within the scope of pumping light spectral line line shape function, some frequency component produces positive optical frequency shift, and another part frequency component produces negative optical frequency shift.So-called adjusting to zero optical frequency shift, only actually means that the summation of the optical frequency shift that each several part frequency component within the scope of pumping light spectral line shape function causes is zero.So total optical frequency shift is zero result being actually that the big optical frequency shift amount of positive and negative two is added.
Under these conditions, if Pump intensity changes, the line shape function of spectral line does not change, then still can keep optical frequency shift is zero, if but there is small change in the line shape function of spectral line, it is easy to cause that total optical frequency shift is not zero.And rubidium spectral lamp is in long-term work, does not carry on a shoulder pole Pump intensity and small change can occur, and small change also can occur pumping light spectral line shape function.Spectral lamp is in long-term work, and due to factors such as the change of its duty, the consumption of bulb 87Rb, light intensity changes, and affects the stability indicator of frequency marking.By experiment, the parameter point that complete machine output frequency is insensitive to light intensity can be found.The temperature of the selection of light intensity and integrated filtering resonance bubble is selected to combine consideration by we, selects suitable bubble temperature to make optical frequency shift minimise.Select under different light intensity during experiment, by changing the temperature of integrated filtering resonance bubble, measure the output of overall frequency, obtain the zero light intensity frequency displacement bubble temperature that we need.
In this utility model embodiment, shown in Fig. 4, wherein, abscissa is the temperature of integrated filtering resonance bubble, and vertical coordinate is difference frequency value.It can be seen that when integrated filtering resonance bubble temperature selects the complete machine output frequency when T=T0 unrelated with the spectrum strong I of light, the T0 i.e. bubble temperature of zero light intensity frequency displacement.Precisely, changing the overall frequency curve measured by light intensity can not meet at a bit completely, meets at a little delta-shaped region often, optical frequency shift impact on degree of stability therefore can not be completely eliminated.When have selected the integrated filtering resonance bubble temperature of the best, the impact of frequency can be accomplished 1 × 10 12/1% by light intensity, i.e. light intensity change 1%, then what cause frequency is changed to 1 × 10 12.Certainly for different rubidium clock systems, light intensity is different to the influence degree of frequency, and the same system for being operated in different conditions would also vary from.As shown in Figure 4, for varying in size, pumping light that spectrum line style is identical, the difference frequency value change that the change of chamber temperature causes is different, the slope of 70% light intensity curve is less than the slope of 100% light intensity curve in the drawings, namely for 70% light intensity, little when the frequency displacement caused when chamber temperature changes is than 100% light intensity.If the selection of light intensity further reduces (such as 50% light intensity, 30% light intensity ...), according to the trend in figure, slope light intensity more preferably can be obtained, but owing to consider the signal to noise ratio of system, only small light intensity can not be selected, now require over the proportioning and pressure that change buffer gas in integrated filtering resonance bubble to obtain the light intensity of zero-temperature coefficient.
Therefore, this utility model embodiment adds a hyperfine composition optical filter 103 of magnetic by launching the rear class of light path at spectral lamp 101, select different optical filters, can control spectral lamp light intensity required in above-mentioned theory well, it is prior that can to improve pumping light spectrum linear, so that pumping light spectrum is linear, to be around mid frequency full symmetric, and then reaches to reduce further the technique effect that optical frequency shift produces in this utility model embodiment.
It should be noted that this utility model embodiment also includes the first thermostatic control module 108 and the second thermostatic control module 109, and described first thermostatic control module 108 is connected with described spectral lamp 101.Described second thermostatic control module 109 is connected with described integrated filtering resonance bubble 104.Make the operating ambient temperature of spectral lamp 101 and described integrated filtering resonance bubble 104 is controlled by this utility model embodiment by the first thermostatic control module 108 and the second thermostatic control module 109, to ensure that it is operated under isoperibol.Meanwhile, resonator cavity 102 is additionally provided with magnetic field module (such as field coil), to produce magnetic field.
Further, refer to Fig. 2, another embodiment of the present utility model, additionally provide a kind of method for eliminating optical frequency shift, it is applied to pumping light, wherein, when a pumping light is by integrated filtering resonance bubble, rubidium atom in described integrated filtering resonance bubble is concentrated on five sub-energy levels of F=2, and described method includes:
Step 201, is acted on described rubidium atom by the microwave pulse having certain time interval relevant with two, makes microwave frequency be equal to the frequency of described rubidium atomic ground state 0-0 transition；
Step 202, when second microwave pulse effect, lights spectral lamp, is keeping on microwave pulse exposure basis, is being sampled light detection by microprocessor；
Step 203, closes microwave pulse and spectral lamp, and quantum correction information is passed to microwave interrogation signals generation circuit, complete the servo of complete machine.
Specifically, when a pumping light pulse is by Rb atom frequency marking integrated filtering resonance bubble, the rubidium atom absorbed in bubble is concentrated on five sub-energy levels of F=2, then acting on rubidium atom with two relevant microwave pulses having certain time interval, microwave frequency is exactly equal to the frequency of rubidium atomic ground state 0-0 transition.When second microwave pulse effect, light spectral lamp simultaneously, keeping on microwave pulse exposure basis, it is sampled light detection by microprocessor, after completing light detection, close microwave pulse and spectral lamp, and quantum correction information is passed to microwave interrogation signals generation circuit, complete the servo of complete machine, repeat according to this.The sequential of whole process can as it is shown in figure 5, and pulse pumping light shown in Fig. 6 produce schematic circuit schematic diagram.
As preferably, in this utility model embodiment, before a pumping light is by described integrated filtering resonance bubble, using optical filter that described pumping light is filtered.And the energisation mode of described spectral lamp adopts square-wave voltage energisation mode.
Corresponding with said method embodiment, another embodiment of the present utility model provides a kind of device for eliminating optical frequency shift, it is applied to pumping light, wherein, when a pumping light is by integrated filtering resonance bubble, rubidium atom in described integrated filtering resonance bubble is concentrated on five sub-energy levels of F=2, described device includes: the first module, it is configured to act on described rubidium atom with two relevant microwave pulses having certain time interval, makes microwave frequency be equal to the frequency of described rubidium atomic ground state 0-0 transition；Second module, is configured to, when second microwave pulse effect, light spectral lamp, is keeping on microwave pulse exposure basis, is being sampled light detection by microprocessor；Three module, is configured to close microwave pulse and spectral lamp, and quantum correction information is passed to microwave interrogation signals generation circuit, complete the servo of complete machine.
Wherein, embodiment of the method, device embodiment that this utility model embodiment provides are corresponding with above-mentioned apparatus embodiments, and non-detailed portion refers to apparatus embodiments, repeats no more herein.
Although having been described for preferred embodiment of the present utility model, but those skilled in the art are once know basic creative concept, then these embodiments can be made other change and amendment.So, claims are intended to be construed to include preferred embodiment and fall into all changes and the amendment of this utility model scope.
Obviously, this utility model can be carried out various change and modification without deviating from spirit and scope of the present utility model by those skilled in the art.So, if these amendments of the present utility model and modification belong within the scope of this utility model claim and equivalent technologies thereof, then this utility model is also intended to comprise these change and modification.
As seen through the above description of the embodiments, those skilled in the art is it can be understood that can add the mode of required general hardware platform by software to this utility model and realize.Based on such understanding, the part that prior art is contributed by the technical solution of the utility model substantially in other words can embody with the form of software product, this computer software product can be stored in storage medium, such as ROM/RAM, magnetic disc, CD etc., including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of this utility model or embodiment.
Each embodiment in this specification all adopts the mode gone forward one by one to describe, between each embodiment identical similar part mutually referring to, what each embodiment stressed is the difference with other embodiments.Especially for device or system embodiment, owing to it is substantially similar to embodiment of the method, so describing fairly simple, relevant part illustrates referring to the part of embodiment of the method.Apparatus and system embodiment described above is merely schematic, the wherein said module illustrated as separating component can be or may not be physically separate, the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE.Some or all of module therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
Above to spectral profile update the system provided by the utility model, it is described in detail, principle of the present utility model and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method of the present utility model and core concept thereof；Simultaneously for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications.In sum, this specification content should not be construed as restriction of the present utility model.
Claims (3)
1. a spectral profile update the system, it is characterised in that including:
Spectral lamp, is used for producing pumping light；
Resonator cavity, is placed in the light path of described pumping light, to receive described pumping light；
Optical filter, is fixed between described spectral lamp and described resonator cavity, so that the pumping light in described light path is carried out optical filtering process by described optical filter；
Integrated filtering resonance bubble and light cell, described integrated filtering resonance bubble and described light cell are placed in described resonator cavity；
Microwave seeks signal generating circuit, is connected with described resonator cavity；
Microprocessor, seeks signal generating circuit with described spectral lamp, described light cell and described microwave respectively and is connected.
2. spectral profile update the system as claimed in claim 1, it is characterised in that also include:
First thermostatic control module, described first thermostatic control module is connected with described spectral lamp.
3. spectral profile update the system as claimed in claim 1, it is characterised in that also include:
Second thermostatic control module, described second thermostatic control module is connected with described integrated filtering resonance bubble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620102883.1U CN205377843U (en) | 2016-02-01 | 2016-02-01 | Spectrum profile correction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620102883.1U CN205377843U (en) | 2016-02-01 | 2016-02-01 | Spectrum profile correction system |
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| CN205377843U true CN205377843U (en) | 2016-07-06 |
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| CN201620102883.1U Expired - Fee Related CN205377843U (en) | 2016-02-01 | 2016-02-01 | Spectrum profile correction system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774532A (en) * | 2016-12-29 | 2017-05-31 | 江汉大学 | Steady optical frequency output intent high and its control system |
| CN109639274A (en) * | 2018-12-13 | 2019-04-16 | 江汉大学 | Based on the device for improving optical pumping efficiency |
-
2016
- 2016-02-01 CN CN201620102883.1U patent/CN205377843U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774532A (en) * | 2016-12-29 | 2017-05-31 | 江汉大学 | Steady optical frequency output intent high and its control system |
| CN106774532B (en) * | 2016-12-29 | 2019-02-01 | 江汉大学 | High steady optical frequency output method and its control system |
| CN109639274A (en) * | 2018-12-13 | 2019-04-16 | 江汉大学 | Based on the device for improving optical pumping efficiency |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20170201 |