CN107911116A - A kind of laser frequency standard signal source - Google Patents
A kind of laser frequency standard signal source Download PDFInfo
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- CN107911116A CN107911116A CN201711378381.7A CN201711378381A CN107911116A CN 107911116 A CN107911116 A CN 107911116A CN 201711378381 A CN201711378381 A CN 201711378381A CN 107911116 A CN107911116 A CN 107911116A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/26—Automatic control of frequency or phase; Synchronisation using energy levels of molecules, atoms, or subatomic particles as a frequency reference
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
- H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
- H03L1/04—Constructional details for maintaining temperature constant
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- Spectroscopy & Molecular Physics (AREA)
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Abstract
The invention discloses a kind of laser frequency standard signal source, belong to field of atomic frequency standard.The laser frequency standard signal source includes thermal-insulating body, the inner cavity of the thermal-insulating body is separated into three cavitys, the laser frequency standard signal source further includes voltage controlled crystal oscillator, servo control module and laser, the voltage controlled crystal oscillator, servo control module and laser are separately positioned in three cavitys, and temperature compensation module is additionally provided with the thermal-insulating body；Voltage controlled crystal oscillator, for output frequency signal；The temperature compensation module is used to detect the temperature in the cavity, and carries out temperature-compensating to the voltage controlled crystal oscillator according to the temperature generation correction voltage in the cavity；The servo control module, the frequency signal generation optical detection resonance signal for being exported according to the voltage controlled crystal oscillator are exported into the laser.
Description
Technical field
The present invention relates to field of atomic frequency standard, more particularly to a kind of laser frequency standard signal source.
Background technology
Laser frequency standard (also referred to as laser frequency standard) be by laser frequency lock between the hyperfine energy level of atom or molecule
Stabilization jump frequency, so as to obtain the signal source equipment of high-precision laser frequency output.
Laser frequency standard mainly includes signal source, physical part and electronic circuit.Existing laser frequency standard signal source is by ring
Border temperature has a great influence, and rugged environment can largely effect on the output stability of laser frequency standard, while laser frequency standard signal source
Each part can interfere with each other, and can equally influence the output of laser frequency standard.
The content of the invention
Existing in the prior art in order to solve the problems, such as, an embodiment of the present invention provides a kind of laser frequency standard signal source.It is described
Technical solution is as follows：
An embodiment of the present invention provides a kind of laser frequency standard signal source, the laser frequency standard signal source includes thermal-insulating body,
The inner cavity of the thermal-insulating body is separated into three cavitys, and the laser frequency standard signal source further includes voltage controlled crystal oscillator, SERVO CONTROL
Module and laser, the voltage controlled crystal oscillator, servo control module and laser are separately positioned in three cavitys, the guarantor
Temperature compensation module is additionally provided with incubator body；
Voltage controlled crystal oscillator, for output frequency signal；
The temperature compensation module is used to detect the temperature in the cavity, and is entangled according to the temperature generation in the cavity
Bias-voltage carries out temperature-compensating to the voltage controlled crystal oscillator；
The servo control module, the frequency signal for being exported according to the voltage controlled crystal oscillator generates reference signal, and produces
Raw keying FM signal all the way and all the way timing control signal；Using the reference signal as reference, using the keying tune
Frequency signal carries out keying frequency modulation, produces modulated signal；Under the control of the timing control signal, produce original pulse all the way and believe
Number；The original burst signal is handled using setting frequency dividing ratio, output pulse signal；The pulse signal is mended
Repay；A times mixing is carried out to the pulse signal after compensation and the modulated signal, obtains optical detection resonance signal；To the light
Detect resonance signal and carry out power amplification, and the optical detection resonance signal after power amplification is exported into the laser.
In a kind of implementation of the embodiment of the present invention, the thermal-insulating body includes organic heat-barrier material liner and metal
Material outer wall.
In another implementation of the embodiment of the present invention, the organic heat-barrier material liner using polyurathamc or
Polystyrol plastic foam plate is made.
In another implementation of the embodiment of the present invention, the metal material outer wall, which is adopted, to be formed from aluminium.
In another implementation of the embodiment of the present invention, the thickness of the organic heat-barrier material liner is 3-5 centimetres.
In another implementation of the embodiment of the present invention, the thickness of the metal material outer wall is 3-5 millimeters.
In another implementation of the embodiment of the present invention, the temperature compensation module, which is arranged on, is provided with the servo
In the cavity of control module.
In another implementation of the embodiment of the present invention, the servo control module includes：
Central processing unit, for receiving the frequency signal of the voltage controlled crystal oscillator output, generates according to the frequency signal and joins
Signal is examined, and produces keying FM signal all the way and all the way timing control signal；
First DDS, for as reference, keying tune being carried out using the keying FM signal using the reference signal
Frequently, modulated signal is produced；
2nd DDS, under the control of the timing control signal, producing original burst signal all the way；
Phaselocked loop frequency divider, for being handled using setting frequency dividing ratio the original burst signal, output pulse letter
Number；
Decay matching network, for being compensated to the pulse signal；
Times frequency mixing module, for carrying out times being mixed to the pulse signal after compensation and the modulated signal, obtains light
Detect resonance signal；
Power amplifier, is visited for carrying out power amplification to the optical detection resonance signal, and by the light after power amplification
Resonance signal is surveyed to export into the laser；
The central processing unit, is additionally operable to control the frequency dividing ratio of the phaselocked loop frequency divider；Believed according to the laser frequency standard
The light beam light intensity of the laser output in number source, controls the attenuation multiple of the decay matching network；Believed according to the laser frequency standard
The watt level of the laser in number source, controls the power amplification multiple of the power amplifier.
In another implementation of the embodiment of the present invention, the temperature compensation module includes：
Temperature conversion circuit, for gathering the operating ambient temperature of the voltage controlled crystal oscillator, the working environment temperature that will collect
Degree and the difference of reference work temperature are converted to voltage difference；
Operational amplifier, for carrying out differential amplification to the voltage difference, is compensated voltage；
The central processing unit, for the offset voltage to be acted on the voltage controlled crystal oscillator；
Negative feedback resistor, for adjusting the yield value of the operational amplifier；
Correspondingly, the central processing unit, is additionally operable to by controlling the resistance value of the negative feedback resistor to adjust the computing
The yield value of amplifier.
In another implementation of the embodiment of the present invention, the temperature conversion circuit includes electric bridge, the electric bridge bag
Thermistor Ra, resistance Rb and two resistance R are included, the resistance value of the resistance Rb is corresponding with the reference work temperature, and institute
The temperature coefficient for stating resistance Rb is identical with the thermistor Ra.
The beneficial effect that technical solution provided in an embodiment of the present invention is brought is：
Reference signal is provided by using voltage controlled crystal oscillator, then generating light according to reference signal by servo control module visits
Survey resonance signal to be applied on laser, realize laser frequency standard signal source；The laser frequency standard signal source is carried out using thermal-insulating body
Insulation, can effectively alleviate ambient temperature effect, while carry out temperature-compensating to voltage controlled crystal oscillator by set temperature compensating module,
Can be to avoid influence of the rugged environment to the output stability of laser frequency standard.Meanwhile the voltage controlled crystal oscillator, servo control module
It is separately positioned on laser in three cavitys, avoids interfering with each other the output for influencing laser frequency standard between various pieces.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structure diagram of laser frequency standard signal source provided in an embodiment of the present invention
Fig. 2 is the structure diagram of servo control module provided in an embodiment of the present invention；
Fig. 3 is the structure diagram of temperature compensation module provided in an embodiment of the present invention；
Fig. 4 is the structure diagram of decay matching network provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is the structure diagram of laser frequency standard signal source provided in an embodiment of the present invention, referring to Fig. 1, the laser frequency standard
Signal source includes：The laser frequency standard signal source includes thermal-insulating body 10, and the inner cavity of the thermal-insulating body 10 is separated into three
Cavity, the laser frequency standard signal source further include voltage controlled crystal oscillator 11, servo control module 12 and laser 13, the voltage controlled crystal oscillator
11st, servo control module 12 and laser 13 are separately positioned in three cavitys, are additionally provided with the thermal-insulating body 10
Temperature compensation module 14.
Voltage controlled crystal oscillator 11, for output frequency signal；The temperature compensation module 14 is used to detect the temperature in the cavity
Degree, and temperature-compensating is carried out to the voltage controlled crystal oscillator 11 according to the temperature generation correction voltage in the cavity；The servo control
Molding block 12, the frequency signal for being exported according to the voltage controlled crystal oscillator 11 generates reference signal, and produces keying frequency modulation all the way
Signal and all the way timing control signal；Using the reference signal as reference, keying is carried out using the keying FM signal
Frequency modulation, produces modulated signal；Under the control of the timing control signal, original burst signal all the way is produced；Using setting point
Frequency ratio handles the original burst signal, output pulse signal；The pulse signal is compensated；After compensation
The pulse signal and the modulated signal carry out a times mixing, obtain optical detection resonance signal；To the optical detection resonance signal
Power amplification is carried out, and the optical detection resonance signal after power amplification is exported into the laser 13 of laser frequency standard signal source.
The application provides reference signal by using voltage controlled crystal oscillator, is then given birth to by servo control module according to reference signal
It is applied into optical detection resonance signal on laser, realizes laser frequency standard signal source；The laser frequency standard signal source uses incubator
Body is kept the temperature, and can effectively alleviate ambient temperature effect, while carry out temperature to voltage controlled crystal oscillator by set temperature compensating module
Degree compensation, can be to avoid influence of the rugged environment to the output stability of laser frequency standard.Meanwhile the voltage controlled crystal oscillator, servo
Control module and laser are separately positioned in three cavitys, avoid interfering with each other influence laser frequency standard between various pieces
Output.
In embodiments of the present invention, thermal-insulating body 10 is specifically made of double-layer structure, liner 10A and outer wall 10B, liner
10A and outer wall 10B can be the rectangular parallelepiped structure of sealing, and the size of liner 10A is less than outer wall 10B, and liner 10A is arranged on outer
Inside wall 10B.
Specifically, in order to ensure the heat-insulating property of thermal-insulating body 10, the thermal-insulating body 10 is included in organic heat-barrier material
Courage 10A and metal material outer wall 10B.Metal material outer wall 10B is the rectangular parallelepiped structure with inner cavity, organic heat-barrier material liner
10A is arranged on the interior intracavitary of metal material outer wall 10B, and the inner cavity of organic heat-barrier material liner 10A is isolated plate 10C and is divided into three
A cavity.The main body of isolation board 10C is made of organic heat-barrier material, and being sticked in the main body of isolation board 10C has metallic plate, avoids
Device in each cavity interferes with each other.
In embodiments of the present invention, the organic heat-barrier material liner 10A can use polyurathamc or polystyrene
Plastic foamboard is made, so as to ensure the heat-insulating property of thermal-insulating body 10.
In embodiments of the present invention, the metal material outer wall 10B, which can be adopted, is formed from aluminium, and on the one hand further strengthens protecting
The heat-insulating property of incubator body 10, on the other hand, interference of the shielding outer signals to signal source.
In embodiments of the present invention, the thickness of the organic heat-barrier material liner 10A can be 3-5 centimetres, this thickness
On the one hand it can realize heat insulation effect, on the other hand be unlikely to so that whole signal volume source is excessive.
In embodiments of the present invention, the thickness of the metal material outer wall 10B can be 3-5 millimeters, this one side of thickness
Face can realize insulation, anti-jamming effectiveness, on the other hand be unlikely to so that whole signal volume source, weight are excessive.
In embodiments of the present invention, the temperature compensation module 14 is arranged on the chamber for being provided with the servo control module 12
In vivo.Temperature compensation module 14 finally realizes that offset voltage can be transferred to voltage controlled crystal oscillator 11 by servo control module 12, because
And temperature compensation module 14 and servo control module 12 are arranged in same chamber body, avoid temperature compensation module 14 and servo
Cable between control module 12 needs, through isolation board 10C, to cause to need to open up the cabling of large-size on isolation board 10C
Hole.
What deserves to be explained is the temperature of three cavitys of thermal-insulating body 10 is suitable, thus temperature compensation module 14 set it is in office
One cavity, the compensating action played are suitable.In addition, need to open up away on isolation board 10C in the liner 10A of thermal-insulating body 10
String holes is to realize that the connection cables between voltage controlled crystal oscillator 11 and servo control module 12, servo control module 12 and laser 13 are worn
Cross.The size of cable hole is as far as possible small, and cable hole can use seal to seal through after cable.
Fig. 2 is the structure diagram of servo control module provided in an embodiment of the present invention, referring to Fig. 2, the SERVO CONTROL
Module 12 includes：
Central processing unit 102, for receiving the frequency signal of the output of voltage controlled crystal oscillator 11, generates with reference to letter according to frequency signal
Number, and produce keying FM signal all the way and all the way timing control signal.
First DDS103, for the reference signal using the generation of central processing unit 102 as reference, using central processing unit
The 102 keying FM signals produced carry out keying frequency modulation, produce modulated signal.
2nd DDS104, under the control for the timing control signal that central processing unit 102 produces, producing original all the way
Pulse signal.
Phaselocked loop frequency divider 105, the original burst signal for being exported using setting frequency dividing ratio to the 2nd DDS104 are carried out
Processing, output pulse signal.
Decay matching network 106, the pulse signal for being exported to phaselocked loop frequency divider 105 compensate.
Times frequency mixing module 107, for the pulse signal and the tune of the first DDS103 outputs exported to decay matching network 106
Signal processed carries out a times mixing, obtains optical detection resonance signal.
Power amplifier 108, for carrying out power amplification to optical detection resonance signal, and by the optical detection after power amplification
Resonance signal is exported into the laser 13 of laser frequency standard signal source.
Central processing unit 102, is additionally operable to the frequency dividing ratio of control phaselocked loop frequency divider 105；According to laser frequency standard signal source
The light beam light intensity that laser 13 exports, the attenuation multiple of control decay matching network 106；According to the laser of laser frequency standard signal source
The watt level of device 13, controls the power amplification multiple of power amplifier 108.
In embodiments of the present invention, central processing unit 102, the frequency signal for voltage controlled crystal oscillator 11 to be exported carry out four times
Frequently, reference signal is obtained.
In embodiments of the present invention, frequency dividing ratio can be 12.
Specifically, since the modulation sideband, of laser 13 is 3417.34375MHz, therefore mantissa is provided by the first DDS103
0.34375MHz parts.Quantum frequency discrimination signal in order to obtain at the same time, it is also necessary on detectable signal (optical detection resonance signal) plus
The one small frequency modulation of keying, the function are realized by the first DDS103.
First DDS103 includes 4-20 frequencys multiplication, since when using 10 frequency multiplication in piece, phase noise is than when not in use
Greatly, therefore in design, to reduce, frequency multiplication number reduces additional phase noise and consideration obtains the output of 57.34375MHz frequency signals
Need, the 10MHz signals exported using voltage controlled crystal oscillator 11 do 4 process of frequency multiplication as the first DDS103's through central processing unit 102
Reference signal, then obtains 240MHz signals as system clock through 6 frequencys multiplication in piece.Central processing unit 102 passes through software command control
Word processed sets the specific rate-adaptive pacemaker of the first DDS103.The first DDS103 such as selection is 48, external clock selected as
40MHz, inside is using 6 times of phaselocked loops (English：Phase Locked Loop, referred to as：PLL), then the first DDS103 is defeated in theory
The frequency range gone out is 0-240MHz, central processing unit 102 by software command control word change 48 binary digits ' 0 ' or
' 1 ', so as to change the specific rate-adaptive pacemaker of the first DDS103, its resolution ratio is (240MHz/248).In specific implementation, centre
It is 1 that reason device 102, which produces duty cycle all the way,：1 keying FM signal is (such as：Frequency is 117Hz) send the FSK to the first DDS103 to draw
Foot, has the function that keying frequency modulation.When there is high level ' 1 ', it is F1 that the first DDS103, which produces frequency signal, when the low electricity of appearance
When flat ' 0 ', it is F2 that the first DDS103, which produces frequency signal, wherein F1=57.34375MHz- Δs f, F2=57.34375MHz+ Δs
f。
Under the control of central processing unit 102, the output 10MHz signals and 0MHz signals of intermittent, obtain 2nd DDS104
To original burst signal.Then the reference signal using the signal that the 2nd DDS104 is exported as phaselocked loop frequency divider 105, in
The frequency dividing ratio for 105 frequency divider of phaselocked loop frequency divider that central processor 102 is set, it is the 2nd DDS104 output frequencies N to obtain frequency
(N=12) pulse signal again.The output of signal is realized through matching network 106 of decaying again.
What the FM signal and decay matching network 106 of the 57.34375MHz ± Δs f of the first DDS103 outputs exported
The pulse signal of 120MHz carries out frequency multiplication and mixing obtains optical detection resonance signal, which is total in frequency mixing module 107 again
The frequency of signal of shaking is 3417.34375MHz ± Δ f, then by the optical detection resonance signal export to power amplifier 108 into
Row power adjusting.Light is finally carried out to laser 13 using the 3417.34375MHz ± Δ f signals that power amplifier 108 exports
Modulation, so as to fulfill laser frequency standard signal source.
Referring to Fig. 2 and Fig. 3, temperature compensation module 14 can include：
Temperature conversion circuit 1120, for collecting temperature compensating module 14 temperature in the cavity as voltage controlled crystal oscillator
Operating ambient temperature, voltage difference is converted to by the difference of the operating ambient temperature collected and reference work temperature.
Operational amplifier A, for carrying out differential amplification to voltage difference, is compensated voltage.
Central processing unit 102, for offset voltage to be acted on voltage controlled crystal oscillator 11.
Negative feedback resistor Rw, for adjusting the yield value of operational amplifier.
Correspondingly, central processing unit 102, are additionally operable to by controlling the resistance value of negative feedback resistor Rw to adjust operational amplifier A
Yield value.
Specifically, temperature conversion circuit 1120 includes electric bridge, and electric bridge includes thermistor Ra, resistance Rb and two resistance R,
The resistance value of resistance Rb is corresponding with reference work temperature, and the temperature coefficient of resistance Rb is identical with thermistor Ra.
In embodiments of the present invention, the resistance value of thermistor Ra is used for identifying the operating ambient temperature of voltage controlled crystal oscillator 11.Heat
Quick resistance Ra may be mounted at the surrounding of voltage controlled crystal oscillator 11.
Temperature compensation module 14 reduces environment temperature to be influenced for the precision of 11 output frequency of voltage controlled crystal oscillator so that the laser
The output accuracy higher in frequency standard signal source.
In embodiments of the present invention, the first DDS103 and the 2nd DDS104 may each comprise AD9954 chips, Yi Jiyu
The regulated power supply and low-pass filter that AD9954 chips are electrically connected.The frequency of first DDS103 and the 2nd DDS104 work compares
Height, chip at work can be hot, not only influence normal circuit working state, or even can cause burning for chip, therefore first
DDS103 and the 2nd DDS104 can also include heat sink, and heat sink is installed on the first DDS103 and the 2nd DDS104, heat dissipation
Connect above piece with box lid shell phase, to obtain the radiating surface of bigger.It is pressed into contact with, is protected with box lid by four springs above heat sink
When demonstrate,proving long-term work, the good contact between the first DDS103 and the 2nd DDS104 and heat sink.
Referring to Fig. 4, decay matching network 106 includes resistance R1, variable capacitance Ck, resistance R3, resistance R4 and the electricity of series connection
Hold C1, decay matching network further includes resistance R2, resistance R5, resistance R6 and capacitance C2, and one end of resistance R2 is connected to can power transformation
Between holding Ck and resistance R1, the other end of resistance R2 is connected between resistance R3 and resistance R4, resistance R5, resistance R6 and capacitance C2
Be serially connected in resistance R4 both ends, resistance R4 and capacitance C1 indirectly, decay matching network further includes input terminal and output terminal, inputs
End is connected between resistance R1 and variable capacitance Ck, and output terminal is connected between resistance R5 and resistance R6；
Correspondingly, central processing unit 102, are additionally operable to the big minor adjustment decay matching network by controlling variable capacitance Ck
106 attenuation multiple.The attenuation multiple of decay matching network 106 is determined by R2/R4.Specifically, variable capacitance Ck, capacitance C2 are
Compensating electric capacity, when meeting R2/R4=C2/Ck, reaches the optimal compensation.Therefore need to adjust by central processing unit 102 variable
The size of capacitance Ck, you can realize the optimal compensation.The branch of resistance R1 and capacitance C1 compositions is used for compensated input signal distribution electricity
The influence of appearance.As shown in Fig. 2, when central processing unit 102 detects the light beam light high power change that laser 13 exports, center
Processor 102 sends feedback signal into decay matching network 106, for defeated to realize by adjusting above-mentioned variable capacitance Ck
Go out the stabilization of signal.
Referring to Fig. 2, which can also include：Arranged on frequency mixing module 107 again and power amplifier 108 it
Between wave filter 109.Wave filter 109 is used to be filtered the output signal of frequency mixing module 107 again.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of laser frequency standard signal source, it is characterised in that the laser frequency standard signal source includes thermal-insulating body, the incubator
The inner cavity of body is separated into three cavitys, and the laser frequency standard signal source further includes voltage controlled crystal oscillator, servo control module and laser
Device, the voltage controlled crystal oscillator, servo control module and laser are separately positioned in three cavitys, in the thermal-insulating body also
It is provided with temperature compensation module；
Voltage controlled crystal oscillator, for output frequency signal；
The temperature compensation module is used to detect the temperature in the cavity, and according to the temperature generation correction electricity in the cavity
Pressure carries out temperature-compensating to the voltage controlled crystal oscillator；
The servo control module, the frequency signal for being exported according to the voltage controlled crystal oscillator generates reference signal, and produces one
Road keying FM signal and all the way timing control signal；Using the reference signal as reference, believed using the keying frequency modulation
Number carry out keying frequency modulation, produce modulated signal；Under the control of the timing control signal, original burst signal all the way is produced；
The original burst signal is handled using setting frequency dividing ratio, output pulse signal；The pulse signal is compensated；
A times mixing is carried out to the pulse signal after compensation and the modulated signal, obtains optical detection resonance signal；The light is visited
Survey resonance signal and carry out power amplification, and the optical detection resonance signal after power amplification is exported into the laser.
2. laser frequency standard signal source according to claim 1, it is characterised in that the thermal-insulating body includes organic heat-insulated material
Expect liner and metal material outer wall.
3. laser frequency standard signal source according to claim 2, it is characterised in that the organic heat-barrier material liner is using hair
Bubble polyurethane or polystyrol plastic foam plate are made.
4. laser frequency standard signal source according to claim 2, it is characterised in that the metal material outer wall uses aluminum
Into.
5. laser frequency standard signal source according to claim 2, it is characterised in that the thickness of the organic heat-barrier material liner
For 3-5 centimetres.
6. laser frequency standard signal source according to claim 2, it is characterised in that the thickness of the metal material outer wall is 3-
5 millimeters.
7. laser frequency standard signal source according to any one of claims 1 to 6, it is characterised in that the temperature compensation module
It is arranged on and is provided with the cavity of the servo control module.
8. laser frequency standard signal source according to any one of claims 1 to 6, it is characterised in that the servo control module
Including：
Central processing unit, for receiving the frequency signal of the voltage controlled crystal oscillator output, generates with reference to letter according to the frequency signal
Number, and produce keying FM signal all the way and all the way timing control signal；
First DDS, for as reference, keying frequency modulation, production being carried out using the keying FM signal using the reference signal
Raw modulated signal；
2nd DDS, under the control of the timing control signal, producing original burst signal all the way；
Phaselocked loop frequency divider, for being handled using setting frequency dividing ratio the original burst signal, output pulse signal；
Decay matching network, for being compensated to the pulse signal；
Times frequency mixing module, for carrying out times being mixed to the pulse signal after compensation and the modulated signal, obtains optical detection
Resonance signal；
Power amplifier, for carrying out power amplification to the optical detection resonance signal, and the optical detection after power amplification is total to
Signal output of shaking is into the laser；
The central processing unit, is additionally operable to control the frequency dividing ratio of the phaselocked loop frequency divider；According to the laser frequency standard signal source
Laser output light beam light intensity, control it is described decay matching network attenuation multiple；According to the laser frequency standard signal source
Laser watt level, control the power amplification multiple of the power amplifier.
9. laser frequency standard signal source according to any one of claims 1 to 6, it is characterised in that the temperature compensation module
Including：
Temperature conversion circuit, for gathering the operating ambient temperature of the voltage controlled crystal oscillator, by the operating ambient temperature collected with
The difference of reference work temperature is converted to voltage difference；
Operational amplifier, for carrying out differential amplification to the voltage difference, is compensated voltage；
The central processing unit, for the offset voltage to be acted on the voltage controlled crystal oscillator；
Negative feedback resistor, for adjusting the yield value of the operational amplifier；
Correspondingly, the central processing unit, is additionally operable to by controlling the resistance value of the negative feedback resistor to adjust the operation amplifier
The yield value of device.
10. laser frequency standard signal source according to claim 9, it is characterised in that the temperature conversion circuit includes electric bridge,
The electric bridge includes thermistor Ra, resistance Rb and two resistance R, the resistance value of the resistance Rb and the reference work temperature
It is corresponding, and the temperature coefficient of the resistance Rb is identical with the thermistor Ra.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832926A (en) * | 2018-07-09 | 2018-11-16 | 北京无线电计量测试研究所 | A kind of integrated atom beamforming opctical frequency standard |
| CN109459718A (en) * | 2018-12-10 | 2019-03-12 | 中国电力科学研究院有限公司 | Surge voltage standard wave source |
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| CN108832926B (en) * | 2018-07-09 | 2021-12-10 | 北京无线电计量测试研究所 | Integrated atomic beam type optical frequency standard |
| CN109459718A (en) * | 2018-12-10 | 2019-03-12 | 中国电力科学研究院有限公司 | Surge voltage standard wave source |
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