CN210111977U - Raman transition frequency generation device for cold atom interference type gravimeter - Google Patents
Raman transition frequency generation device for cold atom interference type gravimeter Download PDFInfo
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- CN210111977U CN210111977U CN201920833842.3U CN201920833842U CN210111977U CN 210111977 U CN210111977 U CN 210111977U CN 201920833842 U CN201920833842 U CN 201920833842U CN 210111977 U CN210111977 U CN 210111977U
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Abstract
The Raman transition frequency generation device for the cold atom interference type gravimeter comprises a high-frequency signal generation circuit unit, a low-frequency signal generation circuit unit and a difference frequency signal circuit unit; the high-frequency signal generating circuit unit modulates and outputs a high-frequency high-power signal and comprises an atomic clock of a signal input port, a first one-to-four power divider, a high-frequency oscillator and a second one-to-four power divider; the low-frequency signal generating circuit unit outputs modulated low-frequency signals, wherein the modulated low-frequency signals comprise a direct digital frequency synthesizer (DDS), a frequency doubler, a first amplifier, a band-pass filter and a switch difference frequency signal circuit unit, the switch difference frequency signal circuit unit mixes a first high-frequency signal and a second low-frequency signal and finally outputs electromagnetic waves with specific frequency and power, and the switch difference frequency signal circuit unit comprises a mixer, a second band-pass filter, a second amplifier, an isolator and a one-to-two power divider. The utility model has the advantages of high stability, quick response, various output functions, light and handy volume, strong compatibility, relatively low use cost and the like.
Description
Technical Field
The utility model relates to a microwave radio frequency technology field especially takes place the required specific frequency of Raman transition under the electromagnetic wave to cold atom among the cold atom interference type gravity meter.
Background
The Raman transition of ultralow temperature atoms is an important part for realizing the cold atom interference gravimeter, and has special requirements on the frequency and the power of electromagnetic waves.
In the implementation process, the high frequency needs to be mixed and locked with a specific frequency at an atomic transition resonance frequency point, and the frequency point is a very critical part in the Raman selection state. However, the existing commercial radio frequency module has slow response speed to the raman state selection in the cold atom interference type gravimeter, poor stability, single function, excessively heavy whole body and high use cost.
Disclosure of Invention
The utility model discloses overcome prior art's above-mentioned shortcoming, provide a raman transition frequency generation device in being arranged in cold atom interference type gravity appearance, the device stable performance, compatible strong and use cost hangs down.
The utility model provides a be arranged in cold atom interference type gravity appearance Raman transition frequency generating device, the main functional unit who includes has: a high frequency signal generating circuit unit 1, a low frequency signal generating circuit unit 2, and a difference frequency signal circuit unit 3.
The high-frequency signal generating circuit unit 1 modulates and outputs a high-frequency high-power signal, and comprises an atomic clock of a signal input port, a first one-to-four power divider, a high-frequency oscillator and a second one-to-four power divider. The output end of the signal input end atomic clock is connected with the first pin of the first one-to-four power divider, the second end of the first one-to-four power divider is connected with the first end of the 7GHz high-frequency oscillator, the third end, the fourth end and the fifth end are externally connected for output, the second end of the 7GHz high-frequency oscillator is connected with the first end of the second one-to-four power divider, the second end of the second one-to-four power divider is connected with the first end of the frequency mixer of the difference frequency signal circuit unit 3, and the third end, the fourth end and the fifth end are externally connected for output.
The low-frequency signal generating circuit unit 2 outputs a modulated low-frequency signal, which includes a direct digital synthesizer DDS, a frequency doubler, a first amplifier, a band-pass filter, and a switch. The low-frequency signal from the DDS is connected to the first end of the frequency multiplier, the second end of the frequency multiplier is connected to the first end of the first amplifier, the second end of the frequency multiplier is connected to the first end of the first band-pass filter, the second end of the first band-pass filter is connected to the first end of the switch, and the second end of the switch is connected to the second end of the frequency mixer of the difference frequency signal circuit unit 3.
The difference frequency signal circuit unit 3 mixes the first high frequency signal and the second low frequency signal and finally outputs an electromagnetic wave with a specific frequency and power, wherein the difference frequency signal circuit unit comprises a mixer, a second band-pass filter, a second amplifier, an isolator and a one-to-two power divider. The signal output after passing through the frequency mixer is at the required resonance frequency, the third end of the frequency mixer is connected with the first end of the band-pass filter, the second end of the band-pass filter is connected with the first end of the isolator, the second end of the isolator is connected with the first end of the one-in-two power divider, and the second end of the one-in-two power divider finally outputs microwaves with two paths of resonance frequencies.
The utility model has the advantages that: the microwave interference type cold atom interferometer can rapidly provide stable microwaves with specific frequencies in the cold atom interference type gravimeter, and has the advantages of high stability, quick response, various output functions, light and handy volume, strong compatibility, relatively low use cost and the like.
Drawings
FIG. 1 is a block diagram of the structural elements of the present invention;
fig. 2 is a schematic design diagram of the present invention.
FIG. 2a is an enlarged view of the high frequency signal generating circuit unit 1
FIG. 2b is an enlarged view of the home-made low frequency signal generating circuit unit 2
FIG. 2c is an enlarged view of the difference frequency signal circuit unit 3
Detailed Description
The technical scheme of the utility model is further explained in the following with the attached drawings.
Referring to fig. 1 and fig. 2, fig. 2a, fig. 2b, fig. 2c, the utility model discloses a high frequency microwave generator for cold atom interference type gravimeter, including high frequency signal generation circuit unit 1, low frequency signal generation circuit unit 2 and difference frequency signal circuit unit 3 that connect gradually.
The high-frequency signal generating circuit unit 1 modulates and outputs a high-frequency high-power signal, which includes an atomic clock of a signal input port, a first one-to-four power divider, a high-frequency oscillator, and a second one-to-four power divider. The output end of the signal input end atomic clock is connected with a first pin of a first one-to-four power divider, a second end of the first one-to-four power divider is connected with a first end of a high-frequency oscillator, and a third end, a fourth end and a fifth end are externally connected for output; the second end of the high-frequency oscillator is connected with the first end of the second divide-by-four power divider, the second end of the second divide-by-four power divider is connected with the first end of the mixer of the resonant frequency signal mixing circuit unit 3, and the third end, the fourth end and the fifth end are externally connected for output.
The low-frequency signal generating circuit unit 2 outputs a modulated low-frequency signal, which includes a direct digital synthesizer DDS, a frequency doubler, a first amplifier, a band-pass filter, and a switch. The low-frequency signal from the DDS is connected to the first end of the frequency multiplier, the second end of the frequency multiplier is connected to the first end of the first amplifier, the second end of the frequency multiplier is connected to the first end of the first band-pass filter, the second end of the first band-pass filter is connected to the first end of the switch, and the second end of the switch is connected to the second end of the frequency mixer of the difference frequency signal circuit unit 3.
The difference frequency signal circuit unit 3 mixes the first high frequency signal and the second low frequency signal and finally outputs an electromagnetic wave with a specific frequency and power, wherein the difference frequency signal circuit unit comprises a mixer, a second band-pass filter, a second amplifier, an isolator and a one-to-two power divider. The signal output after passing through the frequency mixer is a difference frequency signal, the third end of the frequency mixer is connected with the first end of the band-pass filter, the second end of the band-pass filter is connected with the first end of the isolator, the second end of the isolator is connected with the first end of the one-to-two power divider, and the second end of the one-to-two power divider finally outputs two paths of difference frequency microwave signals.
Signals output by the atomic clock are sent to the high-frequency oscillator through the coaxial cable to output high-frequency signals, then the high-frequency signals and low-frequency signals output by the DDS are subjected to frequency doubling and then frequency mixing, and finally stable difference frequency microwave signals are output. The high-frequency signal and the low-frequency signal pass through the power divider and then are output outwards, so that simplification of module output is avoided, and the final output signal is more stable by the filter after DDS output, the isolator after mixing and the filter, the bandwidth is narrower, and the signal-to-noise ratio is higher.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather the scope of the invention is intended to include equivalent technical means as would be understood by those skilled in the art from the inventive concepts.
Claims (1)
1. The Raman transition frequency generation device for the cold atom interference type gravimeter comprises a high-frequency signal generation circuit unit (1), a low-frequency signal generation circuit unit (2) and a difference frequency signal circuit unit (3);
the high-frequency signal generation circuit unit (1) modulates and outputs a high-frequency high-power signal, and comprises an atomic clock of a signal input port, a first one-to-four power divider, a high-frequency oscillator and a second one-to-four power divider; the output end of the signal input end atomic clock is connected with a first pin of a first one-to-four power divider, a second end of the first one-to-four power divider is connected with a first end of a 7GHz high-frequency oscillator, a third end, a fourth end and a fifth end are externally connected for output, a second end of the 7GHz high-frequency oscillator is connected with a first end of a second one-to-four power divider, a second end of the second one-to-four power divider is connected with a first end of a frequency mixer of a difference frequency signal circuit unit (3), and the third end, the fourth end and the fifth end are externally connected for output;
the low-frequency signal generating circuit unit (2) outputs a modulated low-frequency signal, wherein the modulated low-frequency signal comprises a direct digital frequency synthesizer (DDS), a frequency doubler, a first amplifier, a band-pass filter and a switch; the low-frequency signal from the DDS is connected with the first end of a frequency multiplier, the second end of the frequency multiplier is connected with the first end of a first amplifier, the second end of the frequency multiplier is connected with the first end of a first band-pass filter, the second end of the first band-pass filter is connected with the first end of a switch, and the second end of the switch is connected with the second end of a frequency mixer of a difference frequency signal circuit unit (3);
the difference frequency signal circuit unit (3) mixes the first high-frequency signal and the second low-frequency signal and finally outputs electromagnetic waves with specific frequency and power, wherein the difference frequency signal circuit unit comprises a mixer, a second band-pass filter, a second amplifier, an isolator and a one-to-two power divider; the signal output after passing through the frequency mixer is at the required resonance frequency, the third end of the frequency mixer is connected with the first end of the band-pass filter, the second end of the band-pass filter is connected with the first end of the isolator, the second end of the isolator is connected with the first end of the one-in-two power divider, and the second end of the one-in-two power divider finally outputs microwaves with two paths of resonance frequencies.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920833842.3U CN210111977U (en) | 2019-06-04 | 2019-06-04 | Raman transition frequency generation device for cold atom interference type gravimeter |
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| CN201920833842.3U CN210111977U (en) | 2019-06-04 | 2019-06-04 | Raman transition frequency generation device for cold atom interference type gravimeter |
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| CN210111977U true CN210111977U (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120812A (en) * | 2019-06-04 | 2019-08-13 | 浙江工业大学 | For Raman transition frequency generating apparatus in cold atom interference-type gravimeter |
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2019
- 2019-06-04 CN CN201920833842.3U patent/CN210111977U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120812A (en) * | 2019-06-04 | 2019-08-13 | 浙江工业大学 | For Raman transition frequency generating apparatus in cold atom interference-type gravimeter |
| CN110120812B (en) * | 2019-06-04 | 2024-05-03 | 浙江工业大学 | Raman transition frequency generating device for cold atom interference type gravimeter |
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