CN109818249A - Device based on cold atom laser circuit - Google Patents
Device based on cold atom laser circuit Download PDFInfo
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- CN109818249A CN109818249A CN201811521554.0A CN201811521554A CN109818249A CN 109818249 A CN109818249 A CN 109818249A CN 201811521554 A CN201811521554 A CN 201811521554A CN 109818249 A CN109818249 A CN 109818249A
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Abstract
The invention discloses a kind of devices based on cold atom laser circuit, belong to cold atom field of laser device technology, it is communicated including servo unit, voltage controlled crystal oscillator unit, every electric discharge road, comprehensive unit, frequency multiplier and power amplifier, voltage controlled crystal oscillator unit and the servo unit；Every electric discharge road and the voltage controlled crystal oscillator unit communicate, it is described every electric discharge road between the voltage controlled crystal oscillator unit and the servo unit；Comprehensive unit is communicated with described every electric discharge road, the servo unit respectively, and the comprehensive unit is located at described between electric discharge road and the servo unit；Frequency multiplier and it is described communicated every electric discharge road, the comprehensive unit, the comprehensive unit is located at described between electric discharge road and the frequency multiplier；Power amplifier and the frequency multiplier communicate, the frequency multiplier be located at the power amplifier and it is described every electric discharge road and the power amplifier between.Invention achieves the technical effects that can be realized the circuit based on cold atom laser.
Description
Technical field
The invention belongs to cold atom field of laser device technology, in particular to a kind of dress based on cold atom laser circuit
It sets.
Background technique
As the continuous development of cold atom technology is mature, cold atom technology field of precision measurement application potential increasingly
It is taken seriously.Cold atom interferometry needs to use the laser of various frequencies for realizing the imprison of such as atom cooling, atomic energy
State preparation, Raman interference and atomic fluorescence detection etc..The laser needed generally comprises cooling light, returns pump light, Raman light, detection
Light.
For it is existing based on the technology of cold atom laser circuit for, the cold atom of Full-optical interferes gravimeter, needs
Additional state is wanted to prepare light and remove light and cooperate existing Raman light, return pump light compound action to replace frequency microwave source in atom
State preparatory phase role.In order to obtain these laser, common laser solution needs to use multi-station laser, this is not only
It increases the complexity of laser frequency stabilization phase-locked system, while but also light path system is excessive, being unfavorable for minimizing, anti-interference ability
It is deteriorated.Meanwhile in order to obtain the laser of required frequency, the specification for the frequency shifter used in the light path system of usual laser solution
Type and quantity are also more more miscellaneous, and which increases the complexity of frequency shifter drive system and the unstability of system.
In conclusion there is be difficult to realize swash based on cold atom in the existing technology based on cold atom laser
The technical issues of circuit of light device.
Summary of the invention
The technical problem to be solved by the present invention is in the existing technology based on cold atom laser, there is be difficult to
The technical issues of realizing the circuit based on cold atom laser.
In order to solve the above technical problems, the present invention provides a kind of device based on cold atom laser circuit, the base
It include servo unit in the device of cold atom laser circuit, the servo unit receives the physical system amount that photocell detects
Sub- frequency discrimination signal；Voltage controlled crystal oscillator unit, the voltage controlled crystal oscillator unit and the servo unit communicate, the physical system quantum mirror
Frequency signal forms correction voltage through the servo unit processing, controls the frequency of the voltage controlled crystal oscillator unit；Every electric discharge road,
It is described to be communicated every electric discharge road and the voltage controlled crystal oscillator unit, it is described to be located at the voltage controlled crystal oscillator unit and the servo every electric discharge road
It is described to be used for the isolation distribution to input signal and Ge Lu output signal every electric discharge road between unit；Comprehensive unit, the synthesis
Unit is communicated with described every electric discharge road, the servo unit respectively, and the comprehensive unit, which is located at, described every electric discharge road and described to be watched
It takes between unit, the comprehensive unit adds the small frequency modulation of keying in microwave signal；Frequency multiplier, the frequency multiplier and it is described every
Electric discharge road, the comprehensive unit communicate, and the comprehensive unit is located at described between electric discharge road and the frequency multiplier, the frequency multiplication
Device makes frequency multiplication input signal zero point together with the starting point close-coupled for exporting double frequency pulse, and double frequency pulse is extremely narrow；Power
Amplifier, the power amplifier and the frequency multiplier communicate, and the frequency multiplier is located at the power amplifier and described every putting
Between circuit and the power amplifier, the power amplifier is for amplifying the power of microwave signal.
Further, the device based on cold atom laser circuit includes by described every putting circuit output
10MHz frequency signal is transferred to the frequency multiplier, to generate 120MHz radiofrequency signal.
Further, the device based on cold atom laser circuit includes described every the 10MHz frequency for putting circuit output
Rate signal is mixed with the 57.34375MHz signal for the keyed control frequency that the comprehensive unit exports, mixed to be transferred to microwave multiple-frequency
In frequency module, to form the microwave signal of 3417.34375MHz.
Further, the device based on cold atom laser circuit includes by the micro- of the 3417.34375MHz
The electric current of wave signal modulation laser generates the modulation sideband, that two sizes are 3.4GHz, on laser spectrum with the amount of acting on
Subsystem.
Further, the device based on cold atom laser circuit includes that the frequency discrimination signal of the quantized system is passed
It is handed to the servo unit.
Further, the device based on cold atom laser circuit includes generating after servo unit processing
Correction voltage acts on voltage controlled crystal oscillator, and the output frequency of the voltage controlled crystal oscillator unit is locked in quantized system 87Rb ground state and is surpassed
In fine structure atom 0-0 transition center frequency.
Further, the device based on cold atom laser circuit includes the output signal power every electric discharge road
For 7dBm, isolation is -50dB between input and output, and isolation is -50dB between road.
Further, the device based on cold atom laser circuit includes the servo circuit loop of the servo unit
Response time is adjustable, and correction voltage range is 0 to 10V.
Further, the device based on cold atom laser circuit includes that the frequency range of the power amplifier is
10MHz to 4200MHz.
Further, the device based on cold atom laser circuit includes that the dynamic range of the power amplifier is
NF is 8dB, and IP3 is+38dBm.
The utility model has the advantages that
The present invention provides a kind of device based on cold atom laser circuit, receives photocell by servo unit and detects
Physical system quantum frequency discrimination signal；Voltage controlled crystal oscillator unit and the servo unit are interconnected, the physical system quantum mirror
Frequency signal forms correction voltage through the servo unit processing, controls the frequency of the voltage controlled crystal oscillator unit；Every electric discharge road
Be interconnected with the voltage controlled crystal oscillator unit, it is described every electric discharge road be located at the voltage controlled crystal oscillator unit and the servo unit it
Between, it is described to be used for the isolation distribution to input signal and Ge Lu output signal every electric discharge road.Meanwhile comprehensive unit respectively with it is described
Be interconnected every electric discharge road, the servo unit, the comprehensive unit be located at it is described between electric discharge road and the servo unit,
The comprehensive unit adds the small frequency modulation of keying in microwave signal；Frequency multiplier and it is described every electric discharge road, the comprehensive unit phase
Intercommunicated, for the comprehensive unit positioned at described between electric discharge road and the frequency multiplier, the frequency multiplier makes frequency multiplication input signal
Zero point is together with the starting point close-coupled of output double frequency pulse, and double frequency pulse is extremely narrow.And power amplifier and described
Frequency multiplier is interconnected, the frequency multiplier be located at the power amplifier and it is described every discharge road and the power amplifier it
Between, the power amplifier is for amplifying the power of microwave signal.Swashed to reach can be realized based on cold atom
The technical effect of the circuit of light device.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of schematic diagram of the device based on cold atom laser circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit design of device based on cold atom laser circuit provided in an embodiment of the present invention
Schematic diagram；
Fig. 3 is a kind of circuit design of the device based on cold atom laser circuit provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of device based on cold atom laser circuit provided in an embodiment of the present invention every putting circuit block diagram；
Fig. 5 is a kind of Synthesis principle block diagram of the device based on cold atom laser circuit provided in an embodiment of the present invention；
Fig. 6 is a kind of frequency multiplier principle frame of the device based on cold atom laser circuit provided in an embodiment of the present invention
Figure；
Fig. 7 is a kind of microwave circuit principle frame of the device based on cold atom laser circuit provided in an embodiment of the present invention
Figure；
Fig. 8 is a kind of servo circuit principle frame of the device based on cold atom laser circuit provided in an embodiment of the present invention
Fig. 1；
Fig. 9 is a kind of servo circuit principle of the device based on cold atom laser circuit provided in an embodiment of the present invention
Block diagram 2.
Specific embodiment
The invention discloses a kind of devices based on cold atom laser circuit, receive photocell by servo unit 100
The physical system quantum frequency discrimination signal detected；Voltage controlled crystal oscillator unit 200 and the servo unit 100 are interconnected, the object
Reason system quantum frequency discrimination signal forms correction voltage through 100 processing of servo unit, to the voltage controlled crystal oscillator unit 200
Frequency control；Every electric discharge road 300 and the voltage controlled crystal oscillator unit 200 be interconnected, it is described every electric discharge road 300 be located at it is described voltage-controlled
It is described to be used for every electric discharge road 300 to input signal and Ge Lu output signal between crystal oscillator unit 200 and the servo unit 100
Isolation distribution.Meanwhile comprehensive unit 400 is interconnected with described every electric discharge road 300, the servo unit 100 respectively, it is described
Comprehensive unit 400 is located at described between electric discharge road 300 and the servo unit 100, and the comprehensive unit 400 is in microwave signal
The upper plus small frequency modulation of keying；Frequency multiplier 500 and it is described every electric discharge road 300, the comprehensive unit 400 be interconnected, it is described comprehensive
Unit 400 is closed positioned at described between electric discharge road 300 and the frequency multiplier 500, the frequency multiplier 500 makes frequency multiplication input signal zero
Point is together with the starting point close-coupled of output double frequency pulse, and double frequency pulse is extremely narrow.And power amplifier 600 and described
Frequency multiplier 500 is interconnected, and the frequency multiplier 500 is located at the power amplifier 600 and described every road 300 and the function of discharging
Between rate amplifier 600, the power amplifier 600 is for amplifying the power of microwave signal.It can to reach
Realize the technical effect of the circuit based on cold atom laser.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range；Wherein "and/or" keyword involved in this implementation, indicate and or two kinds of situations, in other words, the present invention implement
A and/or B mentioned by example, illustrate two kinds of A and B, A or B situations, describe three kinds of states present in A and B, such as A and/or
B, indicate: only including A does not include B；Only including B does not include A；Including A and B.
Meanwhile in the embodiment of the present invention, when component is referred to as " being fixed on " another component, it can be directly at another
On component or there may also be components placed in the middle.When a component is considered as " connection " another component, it be can be directly
It is connected to another component or may be simultaneously present component placed in the middle.When a component is considered as " being set to " another group
Part, it, which can be, is set up directly on another component or may be simultaneously present component placed in the middle.Made in the embodiment of the present invention
Term "vertical", "horizontal", "left" and "right" and similar statement are merely for purposes of illustration, and are not intended to
The limitation present invention.
It is a kind of signal of device based on cold atom laser circuit provided in an embodiment of the present invention referring to Fig. 1, Fig. 1
Figure.A kind of device based on cold atom laser circuit provided in an embodiment of the present invention, it is described to be based on cold atom laser circuit
Device include servo unit 100, voltage controlled crystal oscillator unit 200, every electric discharge road 300, comprehensive unit 400, frequency multiplier 500 and power
Amplifier 600, now respectively to servo unit 100, voltage controlled crystal oscillator unit 200, every electric discharge road 300, comprehensive unit 400, frequency multiplier
500 and power amplifier 600 carry out following detailed description:
For servo unit 100 and voltage controlled crystal oscillator unit 200:
Servo unit 100 receives the physical system quantum frequency discrimination signal that photocell detects.The frequency discrimination of the quantized system
Signal is passed to the servo unit 100, and the correction voltage generated after the servo unit 100 processing acts on voltage-controlled crystalline substance
Vibration, is locked in quantized system 87Rb ground state hyperfine structure atom 0-0 for the output frequency of the voltage controlled crystal oscillator unit 200
In transition center frequency.The servo circuit loop response time of servo unit 100 is adjustable, and correction voltage range is 0 to 10V.Institute
It states voltage controlled crystal oscillator unit 200 and the servo unit 100 communicates, the physical system quantum frequency discrimination signal is through the servo unit
100 processing form correction voltage, control the frequency of the voltage controlled crystal oscillator unit 200.
Continuing with referring to Fig. 1 and Fig. 2, Fig. 2 is that one kind provided in an embodiment of the present invention is based on cold atom laser circuit
Device circuit design schematic diagram.Functional block diagram is as shown in Figure 1, can (dotted portion can by physical system and circuit
To be circuit of the invention) two parts form.Under the influence of a magnetic field, in absorption bubble87Rb generates atom division, can be formed
Hyperfine tri-state level structure as shown in Figure 2.The ω in Fig. 21、ω2Two hyperfine structures of ground state be can be to excitation state
Energy level transition frequency, f0=| ω1-ω2|,87It is 6.834GHz in Rb.In such level structure, is modulated and swashed by microwave
Light device electric current makes laser spectrum generate two relevant modulation sideband, fM, work as fM=1/2f0When=3.417GHz, in absorption bubble
The hyperfine level atom of ground state will establish a kind of Population Trapping mechanism, form coherent layout population and imprison (Coherent
Population Trapping)。
For every electric discharge road 300, comprehensive unit 400, frequency multiplier 500 and power amplifier 600:
It is communicated every electric discharge road 300 and the voltage controlled crystal oscillator unit 200, it is described to be located at the voltage controlled crystal oscillator every electric discharge road 300
Between unit 200 and the servo unit 100, it is described every electric discharge road 300 be used for input signal and Ge Lu output signal every
From distribution.It is transferred to the frequency multiplier 500 by the 10MHz frequency signal exported every electric discharge road 300, to generate 120MHz
Radiofrequency signal.The keyed control frequency of the 10MHz frequency signal exported every electric discharge road 300 and the comprehensive unit 400 output
57.34375MHz signal mixing, to be transferred in microwave multiple-frequency frequency mixing module, come formed 3417.34375MHz microwave letter
Number.
The electric current that laser is modulated by the microwave signal of the 3417.34375MHz generates two on laser spectrum
Size is the modulation sideband, of 3.4GHz, to act on quantized system.The output signal power every electric discharge road 300 is 7dBm,
Isolation is -50dB between input and output, and isolation is -50dB between road.The comprehensive unit 400 is respectively with described every electric discharge road
300, the servo unit 100 communicates, the comprehensive unit 400 be located at it is described every electric discharge road 300 and the servo unit 100 it
Between, the comprehensive unit 400 adds the small frequency modulation of keying in microwave signal；The frequency multiplier 500 and it is described every electric discharge road
300, the comprehensive unit 400 communicates, the comprehensive unit 400 be located at it is described every electric discharge road 300 and the frequency multiplier 500 it
Between, the frequency multiplier 500 makes frequency multiplication input signal zero point together with the starting point close-coupled for exporting double frequency pulse, and frequency multiplication
Pulse pole is narrow；The power amplifier 600 and the frequency multiplier 500 communicate, and the frequency multiplier 500 is located at the power amplifier
600 and it is described every electric discharge road 300 and the power amplifier 600 between, the power amplifier 600 be used for microwave signal
Power amplifies.The frequency range of the power amplifier 600 is 10MHz to 4200MHz.The power amplifier 600
Dynamic range is that NF is 8dB, and IP3 is+38dBm.
Fig. 3 is referred to, Fig. 3 is a kind of electricity of device based on cold atom laser circuit provided in an embodiment of the present invention
Road conceptual schematic drawing.It is sent every the 10MHz frequency signal for putting output to frequency multiplier 500, generation 120MHz radiofrequency signal, and with
It send after the 57.34375MHz signal mixing of the keyed control frequency of synthesizer output into microwave multiple-frequency frequency mixing module, is formed
The microwave signal of 3417.34375MHz, using the electric current of the signal modulation laser, generating two sizes on laser spectrum is
The modulation sideband, of 3.4GHz acts on quantized system.The frequency discrimination signal of quantized system is sent to servo, after servo circuit is handled
The correction voltage of generation acts on voltage controlled crystal oscillator, so that the output frequency of voltage controlled crystal oscillator is locked in quantized system87Rb ground state is super
In fine structure atom 0-0 transition center frequency.(dotted portion is that circuit has needed to the circuit arrangement of proposed adoption as shown in Figure 3
At work).
In order to voltage controlled crystal oscillator in a kind of device based on cold atom laser circuit provided in an embodiment of the present invention, every
Put, integrate, frequency multiplication, microwave, servo, power amplifier 600 are explained in detail, now respectively to voltage controlled crystal oscillator, every put, integrate,
Frequency multiplication, microwave, servo, power amplifier 600 carry out following detailed description:
(1) voltage controlled crystal oscillator, the physical system quantum frequency discrimination signal that photocell detects, forms through 100 processing of servo unit
Correction voltage is realized and is controlled the frequency of voltage controlled crystal oscillator, so that the intermediate frequency of two modulation sideband,s of laser spectrum be made to be directed at work
Make the 0-0 transition of atom, realizes locking.When selecting voltage controlled crystal oscillator, it is considered as voltage-controlled slope, year drift and short-term stability
Index.The good short steady index of voltage controlled crystal oscillator is conducive to the realization of advantageous combination in system, voltage-controlled slope and the voltage-controlled range of servo
Cooperation ensure that voltage controlled crystal oscillator existing year float index under can be steady in a long-term work.
(2) every putting, Fig. 4 is referred to, Fig. 4 is provided in an embodiment of the present invention a kind of based on cold atom laser circuit
Device every electric discharge 300 block diagram of road.Mainly realize that the isolation to input signal and Ge Lu output signal distributes function every electric discharge road 300
Can, consider its input, outlet chamber isolation and each road between isolation requirement.Proposed adoption scheme as shown in Figure 4.
Every playing function index: power supply: 5V (300mA) input: 10MH signal (offer of 8607 crystal oscillators)；Output: 10MHz signal to frequency multiplication,
For 10MHz signal to servo, 10MHz signal extremely integrates the part DDS, 10MHz signal to the part MCU, 10MHz signal (× 4) is integrated
Output is done to use；Output signal power is 7dBm, and isolation is -50dB between input and output, and isolation is -50dB between road.
(3) comprehensive, Fig. 5 is referred to, Fig. 5 is provided in an embodiment of the present invention a kind of based on cold atom laser circuit
The Synthesis principle block diagram of device.Due to87Rb atom 0-0 jump frequency is 6.834 ×××× GHz, the modulation sideband, of laser
For 3.417 ×××× GHz, therefore mantissa's ×××× part is provided by synthesizer.At the same time to obtain quantum frequency discrimination signal,
It needs in the microwave signal of 3.4GHz plus the small frequency modulation of keying, this function is also realized by synthesizer.It can be using such as
Scheme shown in fig. 5.
Comprehensive DDS unit includes 4-20 frequency multiplication, and when using 10 frequency multiplication in piece, phase noise is bigger than when not in use, therefore
In design, reduces to add for reduction frequency multiplication number and mutually make an uproar and consider that obtaining 57.34375MHz frequency signal exports needs, it is quasi- to adopt
Make DDS reference signal with 40MHz clock signal is obtained through 4 frequencys multiplication every the 10MHz signal released, 6 frequencys multiplication obtain in piece
240MHz signal is as system clock.The frequency of DDS work is relatively high, and chip at work can be hot, not only influences normal
Circuit working state, or even will cause burning for chip, therefore consider for cooling fin to be mounted on DDS chip in design, thereon
Side connects with chassis shell, to obtain bigger radiating surface.It is pressed into contact with by four springs with box cover above cooling fin, guarantees length
Phase work when, DDS chip between cooling fin well contacting.
To be directed at actual physical system87Rb atom center 0-0 jump frequency, meets the needs of debugging efforts, Neng Goufang
Just this function is realized in the output for changing synthesizer 57.34375MHz frequency signal by way of serial communication, and in phase
The parameter changed is saved in the microprocessor EEPROM register answered.
In passive-type atomic frequency standard, the Voltage Controlled Crystal Oscillator in the photocell of quantized system, circuit system determine with
Afterwards, the selection of modulating frequency is closely related with the noise spectrum of these components.It is photronic to dodge frequency spy of the phase noise with 1/f
Property, to avoid dodging the influence of phase noise, need to measure photronic sudden strain of a muscle phase noise spectrum, when selecting modulating frequency, according to what is measured
Photocell dodges phase noise spectrum, should lean on as far as possible to high-end in the conceived case, makes the contribution for dodging phase noise and Johnson noise ratio can
To ignore.
Local oscillator of the crystal oscillator as system, it is attached that its influence to complete machine Stability index is mainly situated in modulating frequency
Close phase noise.Closer from modulating frequency, they are bigger on the influence of the stability of long sample time, conversely, then to short sampling
The stability of time influences bigger.Therefore, when selecting modulating frequency other than considering that photocell dodges phase noise, it is also contemplated that
Avoid the stronger region of crystal oscillator phase noise.Comprehensive function index: power supply: 3.3V (1A), 15V (300mA)；It is defeated
Enter: 10MHz signal to MCU；10MHz signal (× 4) is to DDS；Output: the radio frequency of 57.34375MHz ± Δ f regulable center frequency
Signal.It can have keying frequency modulation function, modulation depth is adjustable.Communication interface: RS-232
(4) frequency multiplication, refers to Fig. 6, and Fig. 6 is provided in an embodiment of the present invention a kind of based on cold atom laser circuit
500 functional block diagram of frequency multiplier of device.The principle of frequency multiplier 500 can be as shown in Figure 6.The additional phase noise of frequency multiplier 500
It is equivalent to the small phase modulation of parasitism, complete machine stability is necessarily finally deteriorated by frequency control loop.The proposed adoption in this circuit
Auto-correlation frequency doubling technology makes frequency multiplication input signal zero point together with the starting point close-coupled for exporting double frequency pulse, and frequency multiplication
Pulse pole is narrow, therefore it mutually makes an uproar low, and higher hamonic wave is abundant, and main side frequency inhibits than big, high-efficient, to keep frequency multiplier 500 right
The negative effect of complete machine stability is ignored.Function technical indicator: power supply: 15V (300mA)；Input: 10MHz signal；It is defeated
Out: 120MHz signal；Output power: 100mW；Main side frequency inhibits ratio: -50dB；Additional instability: δ (1ms)≤1 × 10-10,δ(1S)≤8×10-13。
(5) microwave, refers to Fig. 7, and Fig. 7 is provided in an embodiment of the present invention a kind of based on cold atom laser circuit
The microwave circuit functional block diagram of device.By the modulation to laser diode current, so that microwave signal is made to be added on laser spectrum,
Two 3.4GHz modulation sideband,s are generated on laser spectrum, are acted in absorption bubble87Rb atom generates relevant population prisoner
Prohibit.Due to entire microwave radio chain have passed through every put, frequency multiplication, synthesis, the links such as mixing, in final frequency synthesis, microwave
Frequency spectrum will be very abundant, therefore microwave will pass through the link of chamber frequency-selective filtering and amplification before being added to laser diode current source.
Proposed adoption circuit arrangement as shown in Figure 7.Function technical indicator: input: 120MHz signal, 57.34375MHz ± Δ f signal；
Output: 3417.34375MHz ± Δ f signal；Output power :+4dBm.
(6) servo, refers to Fig. 8, Fig. 9, and Fig. 8 is provided in an embodiment of the present invention a kind of based on cold atom laser electricity
The servo circuit functional block diagram 1 of the device on road；Fig. 9 is provided in an embodiment of the present invention a kind of based on cold atom laser circuit
The servo circuit functional block diagram 2 of device.When in the two modulation sideband, centre frequencies and quantized system being added on laser spectrum
When frequency of heart deviates, quantized system frequency discrimination signal need to be handled through servo circuit, generated voltage controlled crystal oscillator correction voltage, acted on
Voltage controlled crystal oscillator, so that the centre frequency of modulation sideband, is withdrawn into quantized system centre frequency.The servo side that can be used
Case is as shown in Figure 8.
The frequency discrimination AC signal of quantized system is there is noise, and the correction voltage obtained after the acquisition process of servo is one
Determine contribution of the degree there are noise, if directly acting on voltage controlled crystal oscillator through servo output, the stability of complete machine will necessarily be caused
It influences.Using the scheme of digital cumulative mean on servo control-loop road.I.e. microprocessor to the digital phase detection signal of acquisition into
Row cumulative mean can conveniently realize compression of the period less than the noise component of loop response time.Influence Rb atom frequency marking
The noise of short steady index is mainly white noise.According to signal statistics theory, this noise like can effectively be inhibited by cumulative mean.
N times cumulative mean can improve signal-to-noise ratioTimes.Functional parameter: power supply: 5V (300mA), 3.3V (200mA) ,+12V
(500mA),-12V(500mA)；A/D 16,2.5V voltage reference.D/A 20,2.5V voltage reference.Servo circuit loop
Response time is adjustable, and correction voltage range is 0 to 10V.
(7) power amplifier 600, in practical application, the power requirement to microwave signal is+4dBm, and from microwave filtering
The signal power that chamber comes out needs to reach by power amplifier device required requirement often in -20dBm~-30dBm.
600: the Mini-Circuits ZHL-4240W of power amplifier of proposed adoption maturation, size: 178 × 83 × 54 (mm), it is special
It is as follows to levy index: frequency range: 10MHz~4200MHz；Gain:40dB(Flatness:1.5dB)；Output(P-1):+
28dBm；Input(Max):-5dBm；Dynamic range: NF (dB): 8IP3 (dBm) :+38；VSWR (Max): In (2.5) Out
(2.5)；DC:15V, 0.9A (Max).
The present invention provides a kind of device based on cold atom laser circuit, receives photocell inspection by servo unit 100
The physical system quantum frequency discrimination signal measured；Voltage controlled crystal oscillator unit 200 and the servo unit 100 are interconnected, the physics
System quantum frequency discrimination signal forms correction voltage through 100 processing of servo unit, to the frequency of the voltage controlled crystal oscillator unit 200
Rate control；It is interconnected every electric discharge road 300 and the voltage controlled crystal oscillator unit 200, it is described to be located at the voltage-controlled crystalline substance every electric discharge road 300
It shakes between unit 200 and the servo unit 100, it is described to be used for every electric discharge road 300 to input signal and Ge Lu output signal
Isolation distribution.Meanwhile comprehensive unit 400 is interconnected with described every electric discharge road 300, the servo unit 100 respectively, it is described comprehensive
Unit 400 is closed positioned at described between electric discharge road 300 and the servo unit 100, the comprehensive unit 400 is in microwave signal
Add the small frequency modulation of keying；Frequency multiplier 500 and described interconnected every electric discharge road 300, the comprehensive unit 400, the synthesis
For unit 400 positioned at described between electric discharge road 300 and the frequency multiplier 500, the frequency multiplier 500 makes frequency multiplication input signal zero point
Together with the starting point close-coupled of output double frequency pulse, and double frequency pulse is extremely narrow.And power amplifier 600 and described times
Frequency device 500 is interconnected, and the frequency multiplier 500 is located at the power amplifier 600 and described every road 300 and the power of discharging
Between amplifier 600, the power amplifier 600 is for amplifying the power of microwave signal.It can be real to reach
The technical effect of circuit now based on cold atom laser.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. a kind of device based on cold atom laser circuit, which is characterized in that the dress based on cold atom laser circuit
It sets and includes:
Servo unit, the servo unit receive the physical system quantum frequency discrimination signal that photocell detects；
Voltage controlled crystal oscillator unit, the voltage controlled crystal oscillator unit and the servo unit communicate, the physical system quantum frequency discrimination signal
Correction voltage is formed through the servo unit processing, the frequency of the voltage controlled crystal oscillator unit is controlled；
It is described to be communicated every electric discharge road and the voltage controlled crystal oscillator unit every electric discharge road, it is described to be located at the voltage controlled crystal oscillator every electric discharge road
It is described to be used for the isolation distribution to input signal and Ge Lu output signal every electric discharge road between unit and the servo unit；
Comprehensive unit, the comprehensive unit are communicated with described every electric discharge road, the servo unit respectively, and the comprehensive unit is located at
It is described between electric discharge road and the servo unit, the comprehensive unit is in microwave signal plus the small frequency modulation of keying；
Frequency multiplier, the frequency multiplier and it is described communicated every electric discharge road, the comprehensive unit, the comprehensive unit is located at described every putting
Between circuit and the frequency multiplier, the frequency multiplier makes frequency multiplication input signal zero point and exports the close coupling of starting point of double frequency pulse
It is combined, and double frequency pulse is extremely narrow；
Power amplifier, the power amplifier and the frequency multiplier communicate, the frequency multiplier be located at the power amplifier and
It is described between electric discharge road and the power amplifier, the power amplifier is for amplifying the power of microwave signal.
2. the device as described in claim 1 based on cold atom laser circuit, which is characterized in that described to be swashed based on cold atom
The device of light device circuit includes:
It is transferred to the frequency multiplier every the 10MHz frequency signal for putting circuit output by described, to generate 120MHz radiofrequency signal.
3. the device as claimed in claim 2 based on cold atom laser circuit, which is characterized in that described to be swashed based on cold atom
The device of light device circuit includes:
The keyed control frequency exported every the 10MHz frequency signal for putting circuit output and the comprehensive unit
57.34375MHz signal mixing, to be transferred in microwave multiple-frequency frequency mixing module, to form the microwave signal of 3417.34375MHz.
4. the device as claimed in claim 3 based on cold atom laser circuit, which is characterized in that described to be swashed based on cold atom
The device of light device circuit includes:
The electric current that laser is modulated by the microwave signal of the 3417.34375MHz generates two sizes on laser spectrum
For the modulation sideband, of 3.4GHz, to act on quantized system.
5. the device as claimed in claim 4 based on cold atom laser circuit, which is characterized in that described to be swashed based on cold atom
The device of light device circuit includes:
The frequency discrimination signal of the quantized system is passed to the servo unit.
6. the device as claimed in claim 5 based on cold atom laser circuit, which is characterized in that described to be swashed based on cold atom
The device of light device circuit includes:
The correction voltage generated after servo unit processing acts on voltage controlled crystal oscillator, by the defeated of the voltage controlled crystal oscillator unit
Frequency Locking is in quantized system 87Rb ground state hyperfine structure atom 0-0 transition center frequency out.
7. the device as claimed in claim 6 based on cold atom laser circuit, which is characterized in that described to be swashed based on cold atom
The device of light device circuit includes:
The output signal power every electric discharge road is 7dBm, and isolation is -50dB between input and output, between road isolation be -
50dB。
8. the device as claimed in claim 7 based on cold atom laser circuit, which is characterized in that described to be swashed based on cold atom
The device of light device circuit includes:
The servo circuit loop response time of the servo unit is adjustable, and correction voltage range is 0 to 10V.
9. the device as claimed in claim 8 based on cold atom laser circuit, which is characterized in that described to be swashed based on cold atom
The device of light device circuit includes:
The frequency range of the power amplifier is 10MHz to 4200MHz.
10. the device as claimed in claim 9 based on cold atom laser circuit, which is characterized in that described to be based on cold atom
The device of laser circuit includes:
The dynamic range of the power amplifier is that NF is 8dB, and IP3 is+38dBm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811521554.0A CN109818249B (en) | 2018-12-13 | 2018-12-13 | Device based on cold atom laser circuit |
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| CN201811521554.0A CN109818249B (en) | 2018-12-13 | 2018-12-13 | Device based on cold atom laser circuit |
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| CN109818249B CN109818249B (en) | 2021-06-29 |
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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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| CN203166876U (en) * | 2013-02-16 | 2013-08-28 | 江汉大学 | Miniaturized atomic frequency standard |
| CN203166874U (en) * | 2013-02-07 | 2013-08-28 | 江汉大学 | Electronic circuit of atomic frequency standard |
| CN105450225A (en) * | 2014-11-27 | 2016-03-30 | 江汉大学 | Atomic frequency standard and arranging method thereof |
| CN107272394A (en) * | 2017-06-16 | 2017-10-20 | 江汉大学 | A kind of integrated resonant time dissemination system calibration method of backup formula |
| CN107543611A (en) * | 2017-09-25 | 2018-01-05 | 江汉大学 | A kind of atomic spectral line detection device and system closed loop time measuring method, the control method of modulating frequency and light-intensity test frequency |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203166874U (en) * | 2013-02-07 | 2013-08-28 | 江汉大学 | Electronic circuit of atomic frequency standard |
| CN203166876U (en) * | 2013-02-16 | 2013-08-28 | 江汉大学 | Miniaturized atomic frequency standard |
| CN105450225A (en) * | 2014-11-27 | 2016-03-30 | 江汉大学 | Atomic frequency standard and arranging method thereof |
| CN107272394A (en) * | 2017-06-16 | 2017-10-20 | 江汉大学 | A kind of integrated resonant time dissemination system calibration method of backup formula |
| CN107543611A (en) * | 2017-09-25 | 2018-01-05 | 江汉大学 | A kind of atomic spectral line detection device and system closed loop time measuring method, the control method of modulating frequency and light-intensity test frequency |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| CN109818249B (en) | 2021-06-29 |
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