CN108459421A - A kind of generation device and its production method of the super flat microwave frequency comb in broadband - Google Patents
A kind of generation device and its production method of the super flat microwave frequency comb in broadband Download PDFInfo
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- CN108459421A CN108459421A CN201810324529.7A CN201810324529A CN108459421A CN 108459421 A CN108459421 A CN 108459421A CN 201810324529 A CN201810324529 A CN 201810324529A CN 108459421 A CN108459421 A CN 108459421A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 230000035559 beat frequency Effects 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims description 18
- 238000001228 spectrum Methods 0.000 claims description 14
- 239000013307 optical fiber Substances 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 5
- 230000003595 spectral effect Effects 0.000 description 16
- 230000003287 optical effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000004043 responsiveness Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 208000007578 phototoxic dermatitis Diseases 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0121—Operation of devices; Circuit arrangements, not otherwise provided for in this subclass
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
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Abstract
The invention discloses the generation devices and its production method of a kind of super flat microwave frequency comb in broadband, it is characterised in that：Including step：One, single wavelength light source output light is injected into electroabsorption modulator, electroabsorption modulator is driven by radio-frequency signal source, adjust the bias voltage of the voltage and electroabsorption modulator of radio-frequency signal source, electroabsorption modulator is set to be operated in critical condition, intensity modulated occurs in electroabsorption modulator for light, generates the frequency interval comb δ function formula flat equal to the sideband of radiofrequency signal source frequency；Two, the comb δ function formula generated amplifies through amplifier, to compensate the power of electroabsorption modulator absorption loss；Three, the light amplified through amplifier, which is injected into photodetector, carries out beat frequency, generates the flat microwave frequency comb that frequency interval is equal to radiofrequency signal source frequency.The present invention has many advantages, such as to have the advantages of simple structure and easy realization, convenient for tuning.
Description
Technical field
The present invention relates to Microwave photonics fields, and in particular to a kind of generation device of the super flat microwave frequency comb in broadband and
Its production method.
Background technology
Swift and violent with intelligent communication device is popularized, and wireless mobile user explodes in gusher formula, and there is an urgent need to mobile communication
Technology is fast-developing.Frequency range 300MHz to 300GHz microwave as a kind of common wireless carrier, and have
Have like photosensitiveness, like the features such as sound, the property spent together, penetrability and informedness, is surveyed in commercial communication, radar, remote sensing, medical treatment, microwave
There is important application in the fields such as amount.Good microwave signal source is the basis of all microwave regimes application.The raw microwave of traditional electricity
Signalling technique is limited by electronic device, it is difficult to generate the microwave signal of high-frequency stabilization.With photoelectronics and optical fiber technology
Development, can obtain the high frequency being difficult in electrical domain efficiently against " electronic bottleneck " using photoproduction microwave technology
Microwave.
Microwave frequency comb is made of a series of equal discrete microwave signal of frequency intervals, can be in a frequency range simultaneously
The microwave signal of multiple and different frequencies is provided.Relative to single-frequency microwave source, microwave frequency comb more, frequency range with spectral line number
Wide, the advantages that separation of spectra precision is high, there is preferably application in fields such as communication, military affairs, medical treatment, measurements, by the country
The extensive concern of outer researcher.
In the research to generating microwave frequency comb based on photoproduction microwave technology, main method has：Increase moral using Mach
You are modulated laser modulator, generate optical frequency com beat frequency in photodetector (PD) and obtain microwave frequency comb；Profit
The optical frequency com generated with optoelectronic oscillation ring microwave dynamic locked laser, the microwave frequency after photodetector (PD) beat frequency
Comb；Optical frequency com is generated using the nonlinear effect in optical fiber, after PD beat frequencies, obtains microwave frequency comb；Pass through cascade
Multiple phase-modulators generate optical frequency com beat frequency in PD and obtain microwave frequency comb；The light generated based on cycle frequency displacement circuit
It learns frequency comb and obtains microwave frequency comb etc. after PD beat frequencies.In current existing microwave frequency comb scheme, the microwave frequency of generation
The spectral band width of comb, frequency component are less, frequency spectrum flatness is relatively low.Therefore, how to generate that spectral band is wide, frequency component is more
And flat microwave frequency comb becomes particularly important.
Invention content
To solve deficiency in the prior art, the present invention provide a kind of super flat microwave frequency comb in broadband generation device and
Its production method is solved currently with optical means generation microwave frequency comb spectral band width, frequency component is few, frequency spectrum is uneven
Smooth problem.
In order to realize that above-mentioned target, the present invention adopt the following technical scheme that：A kind of production of the super flat microwave frequency comb in broadband
Generation method, it is characterised in that：Including step：
One, single wavelength light source output light is injected into electroabsorption modulator, and electroabsorption modulator is driven by radio-frequency signal source
It is dynamic, the voltage of radio-frequency signal source and the bias voltage of electroabsorption modulator are adjusted, electroabsorption modulator is made to be operated in critical condition,
Intensity modulated occurs in electroabsorption modulator for light, generates the frequency interval pectination flat equal to the sideband of radiofrequency signal source frequency
Spectrum；
Two, the comb δ function formula generated amplifies through fiber amplifier, to compensate the power of electroabsorption modulator absorption loss；
Three, the light amplified through fiber amplifier, which is injected into photodetector, carries out beat frequency, and generation frequency interval, which is equal to, to be penetrated
The flat microwave frequency of frequency source signal frequency is combed.
A kind of production method of the super flat microwave frequency comb in broadband above-mentioned, it is characterized in that：The Single wavelength inputs light source
For laser diode.
A kind of production method of the super flat microwave frequency comb in broadband above-mentioned, it is characterized in that：The fiber amplifier is to mix
Doped fiber amplifier.
A kind of production method of the super flat microwave frequency comb in broadband above-mentioned, it is characterized in that：The radio-frequency signal source is electricity
Absorption modulation device provides driving voltage, and the frequency of radio-frequency signal source determines the frequency interval of the super flat microwave frequency comb in broadband.
A kind of production method of the super flat microwave frequency comb in broadband above-mentioned, it is characterized in that：The electroabsorption modulator is
Multiple quantum wells electroabsorption modulator.
A kind of generation device of the super flat microwave frequency comb in broadband, it is characterized in that：Including single wavelength light source, electro-absorption modulation
Device, radio-frequency signal source, fiber amplifier and photodetector；The single wavelength light source output light is injected into electroabsorption modulator
In, electroabsorption modulator is driven by radio-frequency signal source, adjusts the voltage of radio-frequency signal source and the biased electrical of electroabsorption modulator
Pressure makes electroabsorption modulator be operated in critical condition, and intensity modulated occurs in electroabsorption modulator for light, generates frequency interval etc.
In the comb δ function formula that the sideband of radiofrequency signal source frequency is flat；The comb δ function formula of generation is injected into light after fiber amplifier amplifies
Beat frequency is carried out in electric explorer, generates the flat microwave frequency comb that frequency interval is equal to radiofrequency signal source frequency.
A kind of generation device of the super flat microwave frequency comb in broadband above-mentioned, it is characterized in that：The Single wavelength inputs light source
For laser diode.
A kind of generation device of the super flat microwave frequency comb in broadband above-mentioned, it is characterized in that：The fiber amplifier is to mix
Doped fiber amplifier.
A kind of generation device of the super flat microwave frequency comb in broadband above-mentioned, it is characterized in that：The electroabsorption modulator is
Multiple quantum wells electroabsorption modulator.
The advantageous effect that the present invention is reached：The present invention generates broadband using the modulation critical condition of electroabsorption modulator and surpasses
Flat microwave frequency comb, has many advantages, such as to have the advantages of simple structure and easy realization, and convenient for tuning, is not necessarily to complicated state modulator,
The flat microwave frequency comb in broadband is exported, and the microwave frequency comb generated has good spectral characteristic, in spectral bandwidth, frequency
Advantage is had both in component and flatness, important application can be obtained in high-speed radiocommunication and satellite repeater system.
Description of the drawings
Fig. 1 is the structure chart of microwave frequency comb generation device of the present invention；
Fig. 2 is the flat super flat microwave of comb δ function formula and broadband of obtained sideband in the case of RF signal frequencies are 20GHz
The spectrogram of frequency comb；
Fig. 3 is the spectrogram of the obtained super flat microwave frequency comb in broadband under four groups of different driving voltage conditions；
Fig. 4 is the spectrogram of obtained microwave frequency comb in the case of four different bias voltages；
Fig. 5 is the spectrogram of the obtained super flat microwave frequency comb in broadband in the case of four different light source powers；
Fig. 6 is the spectrogram of the obtained super flat microwave frequency comb in broadband in the case of four different Light source line widths；
Fig. 7 is the spectrogram of the obtained super flat microwave frequency comb in broadband in the case of four difference EDFA length；
Fig. 8 is the spectrogram of the obtained super flat microwave frequency comb in broadband in the case of four difference EDFA pump powers；
Fig. 9 is the spectrogram of the obtained super flat microwave frequency comb in broadband in the case of four difference PD responsivenesses；
The meaning marked in attached drawing：Laser diode-LD, multiple quantum wells electroabsorption modulator-MQW-EAM, radiofrequency signal
Source-RF, erbium-doped fiber amplifier-EDFA, photodetector-PD, spectroanalysis instrument-OSA, spectrum analyzer-ESA.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, a kind of generation device of the super flat microwave frequency comb in broadband, including single wavelength light source, electric absorption tune
Device processed, radio-frequency signal source RF, fiber amplifier, photodetector；The single wavelength light source output light is injected into electro-absorption modulation
In device, electroabsorption modulator is driven by radio-frequency signal source, and the spectrum of generation can be observed in spectroanalysis instrument OSA, and adjusting is penetrated
The voltage of frequency source signal and the bias voltage of electroabsorption modulator, make electroabsorption modulator be operated in critical condition, and light is inhaled in electricity
It receives and intensity modulated occurs in modulator, generate the frequency interval comb δ function formula flat equal to the sideband of radiofrequency signal source frequency,；Production
Raw comb δ function formula, which is injected into after fiber amplifier amplifies in photodetector, carries out beat frequency, and the frequency spectrum of generation is injected into frequency spectrum
In analyzer ESA, the flat microwave frequency that frequency interval can be observed equal to radiofrequency signal source frequency is combed.
The Single wavelength input light source is laser diode LD；The fiber amplifier is erbium-doped optical fiber amplifier EDFA；
The electroabsorption modulator is multiple quantum wells electroabsorption modulator MQW-EAM.
A kind of production method of the super flat microwave frequency comb in broadband, including shown in steps are as follows：
One, laser diode LD is injected into multiple quantum wells electroabsorption modulator MQW-EAM as input light source, output light
In, MQW-EAM is driven by radio-frequency signal source RF, adjusts the voltage V of RF signalsRFWith the bias voltage V of MQW-EAMb, make MQW-
EAM is operated in critical condition, and intensity modulated occurs in MQW-EAM for light, generates frequency interval and is equal to radiofrequency signal source frequency
The flat comb δ function formula of sideband；
Two, the comb δ function formula generated amplifies through erbium-doped optical fiber amplifier EDFA, to compensate the work(of MQW-EAM absorption losss
Rate；
Three, the light amplified through erbium-doped optical fiber amplifier EDFA, which is injected into photoelectric detector PD, carries out beat frequency, generates frequency
It is combed equal to the flat microwave frequency of radio frequency rf signal frequency at interval；
Radio-frequency signal source RF provides driving voltage, the frequency of radio-frequency signal source for multiple quantum wells electroabsorption modulator MQW-EAM
Rate determines the frequency interval of the super flat microwave frequency comb in broadband；
MQW-EAM is operated in reverse-bias state, the voltage V of modulation depth and RF signalsRFWith the biased electrical of MQW-EAM
Press VbSize is related, works as VbWhen smaller, the output light of laser diode LD is modulated through multiple quantum wells electroabsorption modulator MQW-EAM
Afterwards, the polygon band spectrum of Gaussian pulse shape envelope is generated, i.e., centered on input optical wavelength (centre wavelength), separation of spectra is equal to
Radiofrequency signal source frequency, and both sides sideband power is decayed with the increase with the wavelength difference of centre wavelength with exponential form；This
The spectrum of sample amplifies beat frequency in injection photoelectric detector PD through erbium-doped optical fiber amplifier EDFA will generate frequency interval equal to radio frequency
The microwave frequency of signal source RF frequency is combed, but it is combed linear heat generation rate and successively decreases with the increase of frequency, and flatness is bad.For a certain RF
The voltage V of signalRF, with bias voltage VbIncrease, in addition to centre wavelength, remaining sideband power reduces, and in
The sideband power reduction of cardiac wave length is more, while spectral bandwidth remains unchanged.In VbDuring increased, MQW-EAM outputs
A kind of critical condition will occur in spectrum, i.e., other than centered carrier power is especially high, the power for the sideband that other modulation generate
Power is smaller compared with centered carrier, and sideband power is very close, is a kind of critical in whether there is or not the states for generating modulation.This
The spectrum of sample is injected into beat frequency in photoelectric detector PD after erbium-doped optical fiber amplifier EDFA amplifies, and it is super flat will to obtain broadband
Microwave frequency is combed.Work as VbContinue to increase, when being more than the critical condition of MQW-EAM, frequency chirp phenomenon disappears, and no longer generates side
The light of only output center wavelength, such single-wavelength light are injected by band, MQW-EAM after erbium-doped optical fiber amplifier EDFA amplifies
In photoelectric detector PD, beat frequency will no longer occur, microwave signal disappears.To the voltage V of different RF signalsRF, MQW-EAM has not
Same critical condition.As the voltage V for increasing RF signalsRF, and adjust bias voltage VbSo that MQW-EAM is operated in critical condition,
The mean power of the obtained super flat microwave frequency comb in broadband will also increase.
The centre frequency of preliminary setting laser diode LD is 193.1THz, luminous power 1mW, initial phase 0, line width
For 1MHz；The frequency of radio-frequency signal source RF is 20GHz, amplitude 10V；Erbium (Er) ion doping of erbium-doped optical fiber amplifier EDFA
A concentration of 1025/m3, pump power 1000mW, length 6m；The responsiveness of photoelectric detector PD is 1A/W；
Embodiment one：
1, the light of light source output is injected into MQW-EAM, adjusts the bias voltage V of MQW-EAMbIt is at critical shape
State, the flat comb δ function formula of sideband for generating frequency interval equal to radiofrequency signal source frequency are injected into PD and clap after EDFA amplifies
Frequently, frequency spacing is obtained as 20GHz, and spectral bandwidth 300GHz, the microwave frequency that flatness is 0.01dB is combed, as shown in Figure 2.
Embodiment two：
2, other parameters remain unchanged, the voltage V of setting driving radio-frequency signal sourceRFWith the bias voltage V of MQW-EAMbPoint
It Wei not 4V, -3.97V；6V、-4.95V；8V、-5.93V；When 10V, -6.91V, produce flatness be respectively 0.01dB,
Four kinds of flat microwave frequencies of 0.01dB, 0.01dB and 0.01dB, and the mean power of the flat microwave frequency comb exported is with drive
It moves the increase of voltage and increases, as shown in Figure 3.
3, change the bias voltage V of MQW-EAMbWhen being followed successively by -6.71V, -6.81V, -6.91V and -7.01V, output
Microwave frequency comb spectral line flatness be continuously improved, flatness is respectively 30dB, 16dB and 0.01dB, works as VbContinue to increase
It has been more than critical condition when to -7.01V, beat frequency does not occur in PD, microwave signal disappears, as shown in Figure 4.
4, when the input power of change LD light sources is followed successively by 0dBm, 5dBm, 10dBm and 15dBm, the microwave frequency comb of output
Spectral line mean power increase with the increase of light source input power, as shown in Figure 5.
5, when the input line width of change light source is respectively 1000MHz, 100MHz, 10MHz and 1MHz, the microwave frequency of output
For comb almost without any variation, Spectral Purity is very high, so the microwave frequency comb generated is insensitive to laser light source line width,
As shown in Figure 6.
6, when the length of change EDFA is respectively 3m, 6m, 9m and 12m, the spectral line mean power of the microwave frequency comb of output
Increase with the increase of EDFA length, changed power is apparent before length is 6m, changes gentle, changing rule symbol after 6m
Gain curve variation tendencies of the EDFA about length is closed, as shown in Figure 7.
7, when the pump power of change EDFA is respectively 100mW, 400mW, 700mW and 1000mW, the microwave frequency of output
The spectral line mean power of comb increases with the increase of EDFA pump powers, as shown in Figure 8.
8, when the responsiveness of change PD is respectively 0.4A/W, 0.7A/W, 1A/W and 1.3A/W, the microwave frequency comb of output
Spectral line mean power increases with the increase of PD responsivenesses, as shown in Figure 9.
In conclusion the present invention utilizes the modulation critical condition of electroabsorption modulator, the super flat Microwave Frequency in broadband is generated
Rate is combed, simple in structure, easily operated, and the microwave frequency comb of generation has good spectral characteristic, in spectral bandwidth, frequency component
With advantage is had both in flatness, important application can be obtained in high-speed radiocommunication and satellite repeater system.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of production method of the super flat microwave frequency comb in broadband, it is characterised in that：Including step：
One, single wavelength light source output light is injected into electroabsorption modulator, and electroabsorption modulator is driven by radio-frequency signal source, is adjusted
The bias voltage for saving the voltage and electroabsorption modulator of radio-frequency signal source, makes electroabsorption modulator be operated in critical condition, light exists
Intensity modulated occurs in electroabsorption modulator, generates the frequency interval pectination light flat equal to the sideband of radiofrequency signal source frequency
Spectrum；
Two, the comb δ function formula generated amplifies through fiber amplifier, to compensate the power of electroabsorption modulator absorption loss；
Three, the light amplified through fiber amplifier, which is injected into photodetector, carries out beat frequency, generates frequency interval and believes equal to radio frequency
The flat microwave frequency comb of number source frequency.
2. a kind of production method of the super flat microwave frequency comb in broadband according to claim 1, it is characterized in that：The unicast
Long input light source is laser diode.
3. a kind of production method of the super flat microwave frequency comb in broadband according to claim 1, it is characterized in that：The optical fiber
Amplifier is erbium-doped fiber amplifier.
4. a kind of production method of the super flat microwave frequency comb in broadband according to claim 1, it is characterized in that：The radio frequency
Signal source provides driving voltage for electroabsorption modulator, and the frequency of radio-frequency signal source determines the super flat microwave frequency comb in broadband
Frequency interval.
5. a kind of production method of the super flat microwave frequency comb in broadband according to claim 1, it is characterized in that：The electricity is inhaled
Receipts modulator is multiple quantum wells electroabsorption modulator.
6. a kind of generation device of the super flat microwave frequency comb in broadband, it is characterized in that：Including single wavelength light source, electro-absorption modulation
Device, radio-frequency signal source, fiber amplifier and photodetector；The single wavelength light source output light is injected into electroabsorption modulator
In, electroabsorption modulator is driven by radio-frequency signal source, adjusts the voltage of radio-frequency signal source and the biased electrical of electroabsorption modulator
Pressure makes electroabsorption modulator be operated in critical condition, and intensity modulated occurs in electroabsorption modulator for light, generates frequency interval etc.
In the comb δ function formula that the sideband of radiofrequency signal source frequency is flat；The comb δ function formula of generation is injected into light after fiber amplifier amplifies
Beat frequency is carried out in electric explorer, generates the flat microwave frequency comb that frequency interval is equal to radiofrequency signal source frequency.
7. a kind of generation device of the super flat microwave frequency comb in broadband according to claim 6, it is characterized in that：The unicast
Long input light source is laser diode.
8. a kind of generation device of the super flat microwave frequency comb in broadband according to claim 6, it is characterized in that：The optical fiber
Amplifier is erbium-doped fiber amplifier.
9. a kind of generation device of the super flat microwave frequency comb in broadband according to claim 6, it is characterized in that：The electricity is inhaled
Receipts modulator is multiple quantum wells electroabsorption modulator.
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| CN109743115A (en) * | 2018-12-05 | 2019-05-10 | 南京邮电大学 | The microwave frequency comb generation device and method of numerical control light heterodyne method based on MZM |
| CN109743115B (en) * | 2018-12-05 | 2022-02-08 | 南京邮电大学 | MZM-based microwave frequency comb generation device and method of numerical control optical heterodyne method |
| CN109540799A (en) * | 2019-01-25 | 2019-03-29 | 上海朗研光电科技有限公司 | A kind of infrared high-resolution spectra measurement method based on asynchronous iteration frequency displacement |
| CN109540799B (en) * | 2019-01-25 | 2021-12-28 | 上海朗研光电科技有限公司 | Infrared high-resolution spectral measurement method based on asynchronous iterative frequency shift |
| CN111211480A (en) * | 2020-01-14 | 2020-05-29 | 电子科技大学 | Optical frequency comb signal generation device and method |
| CN112987442A (en) * | 2021-02-24 | 2021-06-18 | 南京邮电大学 | Broadband tunable optical frequency comb generation device and method |
| CN113224622A (en) * | 2021-04-21 | 2021-08-06 | 中国人民解放军国防科技大学 | Communication band high-flatness large-comb-tooth-spacing linear polarization electro-optic modulation optical frequency comb light source |
| CN113472445A (en) * | 2021-06-25 | 2021-10-01 | 西北工业大学 | Dual-band RoF system based on PDM-DPMZM and adjusting method |
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