CN107957298A - A kind of laser frequency saltus step measuring device - Google Patents
A kind of laser frequency saltus step measuring device Download PDFInfo
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- CN107957298A CN107957298A CN201711349038.XA CN201711349038A CN107957298A CN 107957298 A CN107957298 A CN 107957298A CN 201711349038 A CN201711349038 A CN 201711349038A CN 107957298 A CN107957298 A CN 107957298A
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- 230000006978 adaptation Effects 0.000 claims abstract description 32
- 230000035559 beat frequency Effects 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 description 9
- 230000005484 gravity Effects 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
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Abstract
The invention belongs to laser frequency measurement field, there is provided a kind of laser frequency saltus step measuring device；Including：Reference laser diode, Quick photoelectric pipe, frequency adjust adaptation module, voltage to frequency conversion module and data acquisition measurement module；Testing laser signal incides Quick photoelectric pipe together with reference laser diode, output signal after beat frequency is input to frequency and adjusts adaptation module, output signal after matching adjusting enters voltage to frequency conversion module and is converted into magnitude of voltage, processing is acquired to output voltage finally by data acquisition measurement module, so as to complete the quick measurement of laser frequency saltus step.The present invention reduces laser frequency using the mode of continuous beat frequency, reuse voltage to frequency conversion module and laser frequency change is converted into DC voltage change, by reading the information of magnitude of voltage, the size of laser frequency saltus step not only can be rapidly measured, the speed of laser frequency saltus step can also be measured.
Description
Technical field
The invention belongs to laser frequency measurement field, more particularly, to a kind of laser frequency saltus step measuring device.
Background technology
As atom laser cools down the appearance with falling into prisoner's technology, the accurate measurement based on cold atom interference technique is constantly sent out
Exhibition.Due to it with potential high sensitivity, with advantages such as quantum attributes, and it is widely used in gravity, gravity gradient, surpasses
The fields of measurement such as fine structure, universal gravitational constant.In order to allow cold atom interferometer more widely to apply to each survey
Amount field, it is necessary to be better achieved its miniaturization with it is practical.And it is wherein important one that the light path of cold atom interferometer, which simplifies,
Part, thus the cold atom interferometer laser system based on single laser light source is also evolving (bibliography：1.Ki-Se
Lee et al, A Phase-modulated Laser System of Ultra-low Phase Noise for
CompactAtom InterferometersJournal of the Korean Physical Society, Vol.67,
No.2, July 2015, pp.318~322；2.Qiyu Wang et al, Acompact laser system for the
cold atom gravimeter Optics Communications 358(2016)82–87).The work of cold atom interferometer
Process includes multiple processes such as atom cooling imprison, upthrow state selection, interference and detection, is required for during each difference
The laser of different frequency operates atom.The frequency of single-mode laser needs to be accurately controlled and tune, and this requires right
Laser frequency hop rate and its frequency hopping amount carry out accurately measurement and control, to complete interferometry.
At present, the instrument of measurable laser frequency mainly has wavemeter, light comb, and laser can be accurately measured by them
Frequency hopping value.But the measurement accuracy of wavemeter is relatively low, and light comb volume is big and involves great expense, in addition, the most key
Be they relative response speed it is slower, can not meet in atomic interferometer for frequency hopping measurement response speed will
Ask, it is even more impossible to effectively measuring laser frequency hop rate.Jumped to accurately measure the frequency of laser in cold atom interferometer
Variable element, it is necessary to which a kind of laser frequency saltus step measuring device more rapidly and accurately completes the measurement of laser frequency parameter.
The content of the invention
The defects of for the prior art, it is an object of the invention to provide a kind of laser frequency saltus step measuring device, it is intended to
The problem of it is slow to solve relative response speed in existing laser frequency measurement device, and laser frequency hop rate can not be measured.
The present invention provides a kind of laser frequency saltus step measuring device, including：Reference laser diode, Quick photoelectric pipe, frequency
Adjust adaptation module, voltage to frequency conversion module and data acquisition measurement module；The first input end of Quick photoelectric pipe is connected to
The output terminal of reference laser diode, the second input terminal of Quick photoelectric pipe are used to receive testing laser, and frequency adjusts adaptation module
Input terminal is connected to the output terminal of Quick photoelectric pipe, and the input terminal of voltage to frequency conversion module is connected to the frequency and adjusts adaptation
The output terminal of module, the input terminal of data acquisition measurement module are connected to the output terminal of voltage to frequency conversion module；Reference laser
Device is used to export reference laser；Quick photoelectric pipe is used to penetrate to exporting after the reference laser and testing laser progress beat frequency processing
Frequency signal；The frequency that frequency adjusts the radiofrequency signal that adaptation module is used to be obtained laser beat frequency is adjusted to voltage to frequency conversion
In the working range of module；Voltage to frequency conversion module is used to for the input signal of different frequency to be converted into different magnitudes of voltage
Output, testing laser signal frequency change the change that will appear as output voltage values；Data acquisition measurement module is used to gather defeated
Go out the change of magnitude of voltage, and the frequency hopping rate and its hop value of testing laser signal are obtained according to the change of output voltage values.
Further, the frequency of the radiofrequency signal of Quick photoelectric pipe output is the reference laser and the frequency of testing laser
Rate is poor.
Further, frequency adjusts adaptation module and includes：First adjustable microwave source, the second adjustable microwave source, the
One frequency mixer, the second frequency mixer, the first low-pass filter and the second low-pass filter；The first input end conduct of first frequency mixer
Frequency adjusts the input terminal of adaptation module, the first adjustable microwave source of the second input terminal connection of the first frequency mixer, the first low pass
The input terminal of wave filter is connected to the output terminal of the first frequency mixer, and the first input end of the second frequency mixer is connected to the first low pass filtered
The output terminal of ripple device, the second adjustable microwave source of the second input terminal connection of the second frequency mixer, the input of the second low-pass filter
End is connected to the output terminal of the second frequency mixer；The output terminal of second low-pass filter adjusts the output of adaptation module as frequency
End；The signal that the adjustable microwave source of radiofrequency signal and first that first frequency mixer exports Quick photoelectric pipe produces is carried out at mixing
Output includes the signal of different frequency component after reason；First filter filtering includes different frequencies by what the first frequency mixer exported
The higher component filtering of the signal intermediate frequency rate of rate component obtains required low frequency signal after removing；Second frequency mixer is by the low frequency
The signal that signal and the second adjustable microwave source produce exports the signal for including more low frequency components after carrying out Frequency mixing processing；Second
The signal comprising more low frequency components that low-pass filter exports the second frequency mixer obtains required frequency after being filtered processing
Radiofrequency signal of the rate within the dynamic range of voltage to frequency conversion module.
Further, voltage to frequency conversion module includes：Sequentially connected comparator, frequency divider and voltage to frequency conversion
Device；Input terminal of the input terminal of comparator as the voltage to frequency conversion module, the output terminal conduct of voltage to frequency converter
The output terminal of the voltage to frequency conversion module；The radiofrequency signal that frequency is adjusted adaptation module output by comparator is converted into numeral
Signal；Frequency divider exports after the frequency of digital signal is further reduced；Voltage to frequency converter is by the letter of different incoming frequencies
The output of different DC voltage values number is converted into, testing laser signal frequency changes the change that will appear as output voltage values.
Present invention also offers a kind of laser frequency saltus step measuring method, comprise the following steps：
(1) radiofrequency signal is exported after carrying out beat frequency processing to reference laser and testing laser；
(2) frequency for the radiofrequency signal for being obtained laser beat frequency is adjusted to the working range of voltage to frequency conversion module
It is interior；
(3) input signal of different frequency is converted into the output of magnitude of voltage at different moments, testing laser signal frequency
Change will appear as the change of output voltage values, realizes and the frequency hopping rate of laser signal to be measured and its quick of hop value are surveyed
Amount.
Further, at different moments the relation between the corresponding frequency f of magnitude of voltage V is：F=KV+b, wherein K
For voltage to frequency transformation ratio, b is that frequency adjusts the offset frequency that adaption system is adjusted.
Further, the relation between the size delta V of the change of testing laser signal frequency and magnitude of voltage change is：Δf
=K Δ V, wherein K are voltage to frequency transformation ratio.
Further, the time difference between the magnitude of voltage of two changes is the frequency hopping rate of testing laser signal.
By the contemplated above technical scheme of the present invention, compared with prior art, the device is by continuous beat frequency and divides
The mode of frequency reduces laser signal frequency, to reduce the difficulty of measurement, finally by voltage to frequency converter by different frequency
Signal be converted into the output of different voltages value, the change of laser frequency is characterized by the change of magnitude of voltage.Due to direct current
Voltage signal more easily realized relative to laser signal quickly collection and processing, and in the device various pieces for signal
Response speed is very fast, so can realize that laser frequency hop rate and the quick of frequency hopping value size are surveyed by the device
Amount.
Brief description of the drawings
Fig. 1 is the overall structure diagram of laser frequency saltus step measuring device provided in an embodiment of the present invention.
Fig. 2 is that frequency adjusts adaptation module structural representation in laser frequency saltus step measuring device provided in an embodiment of the present invention
Figure.
Fig. 3 is voltage to frequency conversion module structural representation in laser frequency saltus step measuring device provided in an embodiment of the present invention
Figure.
Each several part paraphrase is as follows in figure：1 is reference laser diode, and 2 be Quick photoelectric pipe, and 3 adjust adaptation module for frequency, 4
It is data acquisition measurement module for voltage to frequency conversion module, 5,31 is adjustable micro- for second for the first adjustable microwave source, 32
Wave source, 33 be the first frequency mixer, and 35 be the second frequency mixer, and 34 be the first low-pass filter, and 36 be the second low-pass filter, and 41 are
Comparator, 42 be frequency divider, and 43 be voltage to frequency converter.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention relates to a kind of laser frequency saltus step measuring device, belong to laser frequency measurement field, jumped for laser
The measurement ＆ characterization of frequency parameter plays an important roll.
In order to overcome relative response speed in current existing laser frequency measurement device slow, and laser frequency can not be measured
The defects of hop rate, the present invention propose a kind of laser frequency saltus step measuring device；Laser frequency can rapidly be measured
Hop rate and its hop value, it is mainly characterized by：Fast response time, measurable frequency hopping scope are wider, available for laser frequency
Rate is controlled in more demanding experiment and measurement.
As shown in Figure 1, the laser frequency saltus step measuring device in the present invention includes：Reference laser diode 1, Quick photoelectric pipe 2,
Frequency adjusts adaptation module 3, voltage to frequency conversion module 4 and data acquisition measurement module 5；First input of Quick photoelectric pipe 2
End is connected to the output terminal of reference laser diode 1, and the second input terminal of Quick photoelectric pipe 2 is used to receive testing laser, and frequency is adjusted
The input terminal of adaptation module 3 is connected to the output terminal of Quick photoelectric pipe 2, and the input terminal of voltage to frequency conversion module 4 is connected to institute
The output terminal that frequency adjusts adaptation module 3 is stated, the input terminal of data acquisition measurement module 5 is connected to voltage to frequency conversion module 4
Output terminal；Reference laser diode 1 is used to export reference laser, and the frequency of reference laser is close with testing laser signal frequency, and
Locked by Modulation Transfer frequency stabilization or other Frequency Locking modes to make it keep stablizing；Quick photoelectric pipe 2 is used for reference to sharp
Light and testing laser export after carrying out beat frequency processing, laser signal effectively can be converted into radiofrequency signal, wherein signal frequency
For the difference on the frequency of two laser；Frequency adjusts adaptation module 3 and is used for further Regulate signal frequency, effectively can clap laser
The frequency for the radiofrequency signal that frequency is obtained is adjusted to the working range of voltage to frequency conversion module；Voltage to frequency conversion module 4
For the input signal of different frequency to be converted into the output of different magnitudes of voltage, the change of testing laser signal frequency will appear as
The change of output voltage values；Data acquisition measurement module 5 gathers the change of output voltage values, and according to the change of output voltage values
Obtain the frequency hopping rate and its hop value of testing laser signal.
In embodiments of the present invention, reference laser diode 1 is formed by one by the laser of Frequency Locking.By testing laser
Signal is incided on Quick photoelectric pipe 2 together with the reference laser that reference laser diode exports, and two laser signals will by beat frequency
Laser frequency is converted into radiofrequency signal；Then radiofrequency signal is input to frequency and adjusts adaptation module 3, frequency adjusts adaptation module
3 are made of devices such as the frequency mixer of two adjustable microwave sources and correlated frequency and wave filters, are further dropped by mixing and filtering
The low frequency of measured signal.Be connected in voltage to frequency conversion module 4, voltage to frequency conversion module 4 by frequency divider, compare
Device, voltage to frequency converter are formed, and input laser signal effectively can be converted into d. c. voltage signal, last direct current
Pressure is signally attached to data acquisition measurement module 5 and is acquired measurement, and data acquisition measurement module 5 is by capture card and display group
Into.The size of obtained magnitude of voltage change correspond to the size of laser frequency saltus step, and the speed of voltage change characterizes laser frequency
The speed of rate saltus step.
The present invention constantly reduces signal frequency by the way that testing laser signal and reference laser diode and microwave source beat frequency are made the difference
The change of laser frequency, the change of output voltage values is converted into finally by voltage to frequency conversion module by rate, is realized to swashing
The quick measurement of light frequency hop rate and its hop value.The present invention, which can measure, obtains more laser frequency saltus step parameters, from
And improve the timing control of laser frequency in the related experiments such as intervening atom gravity measurement.
For further description laser frequency saltus step measuring device provided in an embodiment of the present invention, below in conjunction with the accompanying drawings
The embodiment of the present invention is further described.
The present invention by voltage to frequency by the continuous beat frequency of testing laser signal by, to reduce signal frequency, and converting mould
Block, is further converted into the change of DC voltage by the change of laser frequency, can be fast by the change for measuring output voltage values
Speed effectively measures the speed and its frequency hopping size of laser frequency change.Laser frequency can be completed by the device to jump
The quick measurement of some basic parameters during change, so as to improve the sequential of laser frequency in the related experiments such as intervening atom gravity measurement
Control.Prime in Fig. 1 is reference laser diode device 1, and the wavelength of its output laser is close with testing laser signal wavelength, and passes through
Modulation Transfer frequency stabilization or other Frequency Locking modes lock, and make its frequency keep stablizing.Testing laser signal and reference laser diode
Signal incides Quick photoelectric pipe 2 together, by that can obtain the beat signal between laser, its signal after photoelectric tube beat frequency
Frequency is exactly the difference on the frequency of testing laser and reference laser diode, and testing laser signal frequency is lowered to by Quick photoelectric pipe and penetrated
In the frequency range of frequency signal.
The radiofrequency signal obtained is input to frequency and adjusts adaptation module 3, frequency adjusts adaptation module 3 can be effective
The frequency for the radiofrequency signal that laser beat frequency is obtained is adjusted to the working range of voltage to frequency conversion module 4, so as to increase
The measurement range of feeder apparatus, to realize that the quick of frequency hopping parameter of the laser signal in photoelectric tube frequency response range is surveyed
Amount.
Wherein, frequency adjusts adaptation module 3 and includes：First adjustable microwave source 31, the second adjustable microwave source 32, first
Frequency mixer 33, the second frequency mixer 35, the first low-pass filter 34 and the second low-pass filter 36；The beat signal of photoelectric tube outgoing
Entered together with the signal produced with the first adjustable microwave source 31 in the first frequency mixer, by the first filter filtering after outgoing
34, the higher component of frequency can be filtered and removed, obtain the signal of low frequency, then together with the signal of the second adjustable microwave source 32
The second frequency mixer 35 is entered, outgoing signal, finally can be effectively by desired signal frequency finally by the second filter filtering
Rate is adjusted to the dynamic range of voltage to frequency conversion module.
After adjusting adaptation module 3 through overfrequency, output signal frequency further reduces, and is input to voltage to frequency conversion
Module 4, voltage to frequency conversion module 4 include：Sequentially connected comparator 41, frequency divider 42 and voltage to frequency converter 43；Letter
Number comparator 41 is input to, analog signal can be converted into digital signal, be easy to implement at signal frequency split and voltage to frequency conversion
Reason.To increase frequency measurement scope, frequency is further reduced by frequency divider 42, the signal after frequency dividing is finally input to frequency
Rate voltage converter 43, the signal of different incoming frequencies can be converted into the output of different DC voltage values, testing laser signal
Frequency changes the change that will appear as output voltage values.
Finally by the output voltage data in data acquisition measurement module 5 are carried out with processing calculating-by acquisition system,
Magnitude of voltage at different moments is obtained, different voltages value V correspond to frequency f, and f=KV+b, voltage to frequency transformation ratio K are depended on
Prime frequency adaptation and frequency divider frequency dividing, b are the frequency offset that frequency adjusts adaption system.V pairs of the size delta of magnitude of voltage change
Answer the changes delta f=K Δs V of laser frequency, the time difference between the magnitudes of voltage of two changes is exactly the frequency hopping of laser signal
Speed, the stability of collection voltages can also be used to the stability of characterization laser frequency.The size of obtained magnitude of voltage change corresponds to
The size of laser frequency hop value, the speed of voltage change characterizes the speed of laser frequency saltus step.It is real by above step
The quick measurement of laser frequency parameter is showed.
The method made the difference by using reference laser diode and testing laser signal beat frequency, radio frequency is reduced to by laser frequency
Frequency range, makes signal be more prone to operate；Make the difference and any radio frequency can be believed with signal beat frequency by adjustable microwave source again
Number adjust in the working range of voltage to frequency conversion module；Voltage to frequency conversion module is finally combined, can be by different frequency
Input signal be converted into different magnitude of voltage outputs.Due to d. c. voltage signal more easily realize relative to laser signal it is fast
The collection and processing of speed, and various pieces are very fast for signal response speed in the device, so can be real by above method
The quick measurement of existing laser frequency hop rate and frequency hopping value size.
The present invention reduces testing laser signal frequency by way of continuous beat frequency makes the difference, and testing laser signal is converted
For direct voltage output, the hop rate and hop value of testing laser frequency are obtained by observing the change of voltage.The present invention
Quickly laser frequency saltus step can be responded, so as to complete the quick survey of laser frequency hop rate and its hop value
Amount.The present invention adjusts adaptation module by frequency, can measure optional frequency saltus step of the laser in photoelectric tube response range
Speed and its hop value size.The present invention can be used for the measurement of laserfrequencystability before and after laser frequency saltus step.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., should all include
Within protection scope of the present invention.
Claims (8)
- A kind of 1. laser frequency saltus step measuring device, it is characterised in that including：Reference laser diode (1), Quick photoelectric pipe (2), frequency Rate adjusts adaptation module (3), voltage to frequency conversion module (4) and data acquisition measurement module (5)；The first input end of the Quick photoelectric pipe (2) is connected to the output terminal of the reference laser diode (1), the Quick photoelectric Second input terminal of pipe (2) is used to receive testing laser, and the input terminal that the frequency adjusts adaptation module (3) is connected to quick light The output terminal of fulgurite (2), the input terminal of the voltage to frequency conversion module (4) are connected to the frequency and adjust adaptation module (3) Output terminal, the input terminal of the data acquisition measurement module (5) is connected to the output of the voltage to frequency conversion module (4) End；The reference laser diode (1) is used to export reference laser；The Quick photoelectric pipe (2) is used to export radiofrequency signal after carrying out beat frequency processing to the reference laser and testing laser；The frequency that the frequency adjusts the radiofrequency signal that adaptation module (3) is used to be obtained laser beat frequency is adjusted to voltage to frequency In the working range of conversion module；The voltage to frequency conversion module (4) is used for the output that the input signal of different frequency is converted into different magnitudes of voltage, Testing laser signal frequency changes the change that will appear as output voltage values；The data acquisition measurement module (5) is used for the change for gathering output voltage values, and is obtained according to the change of output voltage values Obtain the frequency hopping rate and its hop value of testing laser signal.
- 2. laser frequency saltus step measuring device as claimed in claim 1, it is characterised in that Quick photoelectric pipe (2) output Radiofrequency signal frequency for the reference laser and testing laser difference on the frequency.
- 3. laser frequency saltus step measuring device as claimed in claim 1 or 2, it is characterised in that the frequency adjusts adaptation mould Block (3) includes：First adjustable microwave source (31), the second adjustable microwave source (32), the first frequency mixer (33), the second frequency mixer (35), the first low-pass filter (34) and the second low-pass filter (36)；The first input end of first frequency mixer (33) adjusts the input terminal of adaptation module (3) as the frequency, and described the The described first adjustable microwave source (31) of the second input terminal connection of one frequency mixer (33), first low-pass filter (34) Input terminal is connected to the output terminal of first frequency mixer (33), and the first input end of second frequency mixer (35) is connected to institute The output terminal of the first low-pass filter (34) is stated, the second input terminal connection described second of second frequency mixer (35) is adjustable Microwave source (32), the input terminal of second low-pass filter (36) are connected to the output terminal of second frequency mixer (35)；Institute The output terminal for stating the second low-pass filter (36) adjusts the output terminal of adaptation module (3) as the frequency；The radiofrequency signal and the first adjustable microwave source that first frequency mixer (33) exports the Quick photoelectric pipe (2) (31) signal produced exports the signal for including different frequency component after carrying out Frequency mixing processing；In the signal comprising different frequency component that first filter filtering (34) exports first frequency mixer (33) The higher component filtering of frequency obtains required low frequency signal after removing；Second frequency mixer (35) by the signal that the signal of the low frequency and the second adjustable microwave source (32) produce into Output includes the signal of more low frequency components after row Frequency mixing processing；Second low-pass filter (36) by the signal comprising more low frequency components that second frequency mixer (35) exports into Radiofrequency signal of the required frequency within the dynamic range of voltage to frequency conversion module is obtained after row filtering process.
- 4. such as claim 1-3 any one of them laser frequency saltus step measuring devices, it is characterised in that voltage to frequency converts mould Block (4) includes：Sequentially connected comparator (41), frequency divider (42) and voltage to frequency converter (43)；The comparator (41) Input terminal of the input terminal as the voltage to frequency conversion module (4), the output terminal of the voltage to frequency converter (43) makees For the output terminal of the voltage to frequency conversion module (4)；The radiofrequency signal that the frequency is adjusted adaptation module (3) output by the comparator (41) is converted into digital signal；The frequency divider (42) exports after the frequency of the digital signal is further reduced；The signal of different incoming frequencies is converted into the output of different DC voltage values by the voltage to frequency converter (43), to be measured Laser signal frequency changes the change that will appear as output voltage values.
- 5. a kind of laser frequency saltus step measuring method, it is characterised in that comprise the following steps：(1) radiofrequency signal is exported after carrying out beat frequency processing to reference laser and testing laser；(2) frequency for the radiofrequency signal for being obtained laser beat frequency is adjusted to the working range of voltage to frequency conversion module；(3) input signal of different frequency is converted into the output of magnitude of voltage at different moments, the change of testing laser signal frequency The change of output voltage values is will appear as, realizes the quick measurement of the frequency hopping rate and its hop value to laser signal to be measured.
- 6. laser frequency saltus step measuring method as claimed in claim 5, it is characterised in that magnitude of voltage V at different moments and its Relation between respective frequencies f is：F=KV+b, wherein K are voltage to frequency transformation ratio, and b is that frequency adjusts adaption system institute The offset frequency of adjusting.
- 7. laser frequency saltus step measuring method as claimed in claim 5, it is characterised in that testing laser signal frequency change with Magnitude of voltage change size delta V between relation be：Δ f=K Δ V, wherein K are voltage to frequency transformation ratio.
- 8. such as claim 5-7 any one of them laser frequency saltus step measuring methods, it is characterised in that the voltage of two changes Time difference between value is the frequency hopping rate of testing laser signal.
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| CN110927448A (en) * | 2019-11-08 | 2020-03-27 | 华中科技大学 | Silicon-based integrated microwave frequency measuring instrument |
| CN110927448B (en) * | 2019-11-08 | 2020-11-24 | 华中科技大学 | Silicon-based integrated microwave frequency measuring instrument |
| CN110932787A (en) * | 2019-11-29 | 2020-03-27 | 中国舰船研究设计中心 | Frequency hopping communication system based on direct modulation laser and frequency hopping signal generation method |
| CN112595424A (en) * | 2020-12-11 | 2021-04-02 | 中国科学院半导体研究所 | Laser wavelength real-time acquisition and measurement system and method |
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