CN106532421B - More microwave local oscillator generation systems of double mode-locked laser based on optical phase-locked loop - Google Patents
More microwave local oscillator generation systems of double mode-locked laser based on optical phase-locked loop Download PDFInfo
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- CN106532421B CN106532421B CN201611077618.3A CN201611077618A CN106532421B CN 106532421 B CN106532421 B CN 106532421B CN 201611077618 A CN201611077618 A CN 201611077618A CN 106532421 B CN106532421 B CN 106532421B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
- H01S3/1109—Active mode locking
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
- H01S3/1112—Passive mode locking
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a kind of more microwave local oscillator generation systems of double mode-locked laser based on optical phase-locked loop, including two mode-locked lasers, electrooptic modulator, photo-coupler, optical band pass filter, photodetector, low noise acoustoelectric amplipher, electrical oscillator and electric phase discriminator.It receives two mode-locked lasers by 2*2 couplers and exports optical signal and coupled output and divide two-way, two sidebands that optical band pass filter filters out low frequency difference are wherein inputed to all the way, and it is inputted to photodetector, transformed electric signal inputs electric phase discriminator after low noise acoustoelectric amplipher, the electric signal carries out phase demodulation output with electrical oscillator by electric phase discriminator, and the signal is exported and is modulated to electrooptic modulator, to form photoelectricity closed loop, realize the control of light locking phase.The advantage of the invention is that：Stable broadband local oscillator source is generated, system has splendid environment resistant interference performance, is very suitable for engineering application.
Description
Technical field
The invention belongs to microwave photon fields, are in particular a kind of double mode-locked lasers based on optical phase-locked loop
More microwave local oscillator generation systems.
Background technology
In recent years, with the progress of opto-electronic device and Fibre Optical Communication Technology, using optical signal as transport vehicle, space or
For optical fiber as medium, the demand that a certain physical message is detected, transmits and is handled is increasing.In traditional fiber optic communication
While technology develops, there is the emerging research field such as Fibre Optical Sensor, laser radar, Microwave photonics, integrated optics,
And achieve fast development.
In China, satellite communication system is one of China three greatly communication pillar industry, is at present to lead with China Satecom,
The satellite of rail service has 11, and more of subsequent satellites will put into effect.Currently, satellite communication repeater system faces severe choose
War：
1 bandwidth problem.
Due to big data business demands such as radio and television, data transmission, digital broadband multimedia, mobile Internets, there is an urgent need for
Carrier frequency is improved, bandwidth is increased, improves message capacity.
2 electromagnetic interference problems.
The use of a large amount of electronic components, increases electromagnetic interference and signal cross-talk between system.
3 link phase perturbation problems.
Based on the demand, a great problem that stable broadband local oscillator source system is current is generated.The production that trimmed book shakes at present
There is proposition to be generated using optical frequency com, and the generation scheme of optical frequency com includes the cascade modulation production based on modulator
Life is generated based on repetition frequency shift method and silicon-based micro ring structure structure, and generation process can all have phase and disturb in said program
Dynamic problem, it is difficult to meet the requirement of engineering.
Invention content
Technical problem to be solved by the present invention lies in provide it is a kind of can generate stable broadband local oscillator source based on
More microwave local oscillator generation systems of the double mode-locked laser of optical phase-locked loop.
The present invention is to solve above-mentioned technical problem by the following technical programs：A kind of twin-lock mould based on optical phase-locked loop
More microwave local oscillator generation systems of laser, including：
One first mode-locked laser, is used to provide relevant seed light source；
One second mode-locked laser, light output end are connected with the light input end a of an electrooptic modulator, are used to provide width
Band optical frequency com system；
One electrooptic modulator is used to carry out electro-optical modulation to the optical signal that mode-locked laser inputs, realizes and swash to mode locking
The optics shift frequency of light device；
One optical coupler is divided into two light input ports d, e, two optical output ports f, g, wherein mode-locked laser
Output light input to the light input end d of optical coupler, and the output optical signal of electrooptic modulator inputs to optical coupler
Light input end e, by optical coupler by optical signal carry out coupling by two output port of f, g output synthesis optical signal；
One adjustable light wave-filter, the output optical signal for being used to receive the ports output end g from photo-coupler carry out
Optical signal exports after filtering and filtering；
One highly sensitive photodetector, is used to receive optical signal after the filtering from adjustable light wave-filter output end
Carry out opto-electronic conversion；
One low noise acoustoelectric amplipher is used to carry out low noise power amplification to the electric signal that photodetector exports, and
It exports to the input terminal h of electric phase discriminator；
One provides the electrical oscillator of stable local oscillations electric signal, outputs signal to the input terminal i of electric phase discriminator；
One electric phase discriminator, is used for the output signal of low noise acoustoelectric amplipher and the voltage-controlled telecommunications of the local oscillator of optical-electronic oscillator
Number frequency discrimination is carried out, output includes the ac signal of stable phase angle information, and is inputted to the second mode-locked laser；
One light wavelength division multiplexing is used to pass through frequency different channels to the optical signal of the light output end f of photo-coupler
Output；
One photodetector array, is used for the optical signal of opto-electronic conversion channelizing output, and exports the steady of different frequency
Determine local oscillation signal.
Technical solution as an optimization, the first mode-locked laser and the second mode-locked laser are based on quantum dot mode-locked laser
Device or optical fiber mode locked laser.
The Mould locking machine of technical solution as an optimization, the first mode-locked laser and the second mode-locked laser is made as active mode locking
Mechanism either passive mode-locking mechanism.
The repetition rate of technical solution as an optimization, first mode-locked laser and the second mode-locked laser is not
Together.
Technical solution as an optimization, the electrooptic modulator are that acousto-optic modulator or double flat weighing apparatus mach zhender are strong
Spend modulator.
Technical solution as an optimization, the optical filter are tunable narrow-band bandpass filter.
Technical solution as an optimization, wherein the optical-electronic oscillator output electric signal is exported with low noise acoustoelectric amplipher
Signal be same frequency signal.
Technical solution as an optimization, wherein the optical-electronic oscillator output electric signal is exported with low noise acoustoelectric amplipher
Signal frequency it is different, the output end of the electricity phase discriminator is connected to the electrical input c of electrooptic modulator, passes through Electro-optical Modulation
Device is loaded into the Different lightwave length of the second mode-locked laser.
The present invention has the following advantages compared with prior art：It is multi-wavelength on frequency domain based on mode-locked laser output spectrum
Output, two 1,2 repetition rates of mode-locked laser have differences, and two mode-locked laser output lights letter is received by 2*2 couplers 4
Number and coupled output and divide two-way, wherein input to two sidebands that light narrow band filter filters out low frequency difference all the way, and
It is inputted to photodetector and carries out opto-electronic conversion, transformed electric signal carries out power by low noise acoustoelectric amplipher and puts
Greatly, the electric signal and electrical oscillator are subjected to phase demodulation output by electric phase discriminator, and by the signal export to electrooptic modulator into
Row modulation realizes the control of light locking phase to form photoelectricity closed loop.By the phase-locking device, two mode-locked lasers are stablized
Property control, to two mode-locked lasers corresponding sides band by wavelength division multiplexer carry out channelizing processing, finally enter to photoelectricity
Detector array carries out opto-electronic conversion, finally obtains the electric signal output of multi-frequency, exports stable signal source.Compared to existing
Local vibration source generation system, generation system of the invention have splendid environment resistant interference performance, are very suitable for engineering application.
Description of the drawings
Fig. 1 is that the structure of more microwave local oscillator generation systems of the double mode-locked laser the present invention is based on optical phase-locked loop is shown
It is intended to.
Specific implementation mode
It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention
Implement, gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
Refering to Figure 1, the present invention provides a kind of more microwave local oscillations of the double mode-locked laser based on optical phase-locked loop
Source generation system, including：
One mode-locked laser 1, is used to provide relevant seed light source, wherein the mode-locked laser is to be based on quantum dot
Mode-locked laser or optical fiber mode locked laser, and it can also be passive mode-locking machine that mode locking mechanism, which can be active Mould locking machine system,
System；
One mode-locked laser 2, light output end are connected with the light input end a of an electrooptic modulator 3, are used to provide broadband
Optical frequency com system, mode-locked laser 2 generate impulse form in the time domain, are multi-wavelength output form on frequency domain, and
Ensure that mode-locked laser 1 is different with 2 repetition rate of mode-locked laser；
One electrooptic modulator 3 is used to carry out electro-optical modulation to the optical signal that mode-locked laser 2 inputs, realize to mode locking
The optics shift frequency of laser 2, electrooptic modulator 3 can be that acousto-optic modulator or double flat weigh mach zhender intensity modulator,
It is used to carry out optics shift frequency to multiple optical wavelength of mode-locked laser 2；
One optical coupler 4 is divided into two light input ports d, e, two optical output ports f, g, wherein mode-locked laser
The output light of device 1 inputs to the light input end d of optical coupler 4, and the output optical signal of electrooptic modulator 3 inputs to optics coupling
Optical signal is carried out coupling by optical coupler 4 and passes through two output port of f, g output synthesis light letter by the light input end e of clutch 4
Number；
One adjustable light wave-filter 5, be used to receive the output optical signals of the ports output end g from photo-coupler 4 into
Row filtering simultaneously exports optical signal after filtering, and optical filter 5 is tunable narrow-band bandpass filter；
One highly sensitive photodetector 6, light is believed after being used to receive the filtering from 5 output end of adjustable light wave-filter
Number carry out opto-electronic conversion；
One low noise acoustoelectric amplipher 7 is used to carry out low noise power amplification to the electric signal that photodetector 6 exports,
And it exports to the input terminal h of electric phase discriminator 9；
The optical-electronic oscillator 8 of the one stable local oscillations electric signal of output, output is to the input terminal i of electric phase discriminator 9, photoelectricity
It can be same frequency signal that oscillator 8, which exports the signal that electric signal is exported with low noise acoustoelectric amplipher 7, can be omitted electric light at this time
The voltage signal that electric phase discriminator 9 exports directly is converted to the driving current that current signal is loaded into mode-locked laser 2 by modulator 3
On, the wavelength of mode-locked laser 2 is tuned in real time.
One electric phase discriminator 9, is used for voltage-controlled to the output signal and the local oscillator of optical-electronic oscillator 8 of low noise acoustoelectric amplipher 7
Electric signal carries out frequency discrimination, and output includes the ac signal of stable phase angle information, and the electricity for being inputted to electrooptic modulator 3 is defeated
Enter to hold c, 9 function of electricity phase discriminator is mainly by by the output of the output signal of low noise acoustoelectric amplipher 7 and optical-electronic oscillator 8
Signal is mixed to obtain difference frequency signal phase, which is loaded into the Different lightwave of mode-locked laser 2 by electrooptic modulator 3
In length；
One light wavelength division multiplexing 10 is used to pass through frequency different channels to the optical signal of the light output end f of photo-coupler 4
Change output, is used to the multiplex light carrying out frequency-division section output, optical signal carries out cochannel output, the wave similar in frequency
Division multiplexer 10 includes the different output channel of multiple frequencies, and each output channel exports corresponding frequencies interval in multiplex light
Light；The light wavelength division multiplexing 10 is exported according to the frequency interval difference for receiving optical signal in different channel outputs, the wavelength-division
Multiplexer be used for light path according to frequency interval rearrange export, frequency interval by two mode-locked lasers 1,2 wavelength interval
Size determines.
One photodetector array 11, is used for the optical signal of opto-electronic conversion channelizing output, and exports different frequency
Stablize local oscillation signal.
The double mode-locked laser based on phaselocked loop generates more microwave local oscillator systems, is equally applicable to be based on other optics
Frequency comb scheme generates the phase-locked loop of local vibration source system.
It is multi-wavelength output, two 1,2 repetition rates of mode-locked laser on frequency domain based on mode-locked laser output spectrum
It has differences, receives two mode-locked lasers by 2*2 couplers 4 and export optical signal and coupled output and divide two-way, wherein one
Road inputs to light narrow band filter 5 and filters out two sidebands of low frequency difference, and is inputted to photodetector 6 and carries out photoelectricity
Conversion, transformed electric signal carry out power amplification by low noise acoustoelectric amplipher 7, the electric signal and electrical oscillator 8 are passed through
Electric phase discriminator 9 carries out phase demodulation output, and the signal is exported and is modulated to electrooptic modulator 3, real to form photoelectricity closed loop
Now light locking phase controls.By the phase-locking device, stability control is carried out to two mode-locked lasers, to pair of two mode-locked lasers
It answers sideband to carry out channelizing processing by wavelength division multiplexer 10, finally enters and carry out opto-electronic conversion to photodetector array 11,
The electric signal output for finally obtaining multi-frequency exports stable signal source.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the protection of the present invention
Within the scope of.
Claims (8)
1. a kind of more microwave local oscillator generation systems of double mode-locked laser based on optical phase-locked loop, it is characterised in that：Including：
One first mode-locked laser, is used to provide relevant seed light source；
One second mode-locked laser, light output end are connected with the first light input end (a) of an electrooptic modulator, are used to provide
Reflection Optical Thin Film frequency comb system；
One electrooptic modulator is used to carry out electro-optical modulation to the optical signal that mode-locked laser inputs, realize to mode-locked laser
Optics shift frequency；
One optical coupler is divided into two light input ports：Second light input end (d), third light input end (e), two light
Output port：First light output end (f), the second light output end (g), the output light of wherein mode-locked laser input to optical coupled
Second light input end (d) of device, and the output optical signal of electrooptic modulator input to the third light input end of optical coupler
(e), optical signal is carried out by coupling by optical coupler and passes through the first light output end (f), two output end of the second light output end (g)
Mouth output synthesis optical signal；
One adjustable light wave-filter, the output optical signal for being used to receive the second light output end (g) from photo-coupler carry out
Optical signal exports after filtering and filtering；
One highly sensitive photodetector, optical signal carries out after being used to receive the filtering from adjustable light wave-filter output end
Opto-electronic conversion；
One low noise acoustoelectric amplipher is used to carry out low noise power amplification to the electric signal that photodetector exports, and exports
To the input terminal (h) of electric phase discriminator；
One provides the electrical oscillator of stable local oscillations electric signal, outputs signal to the input terminal i of electric phase discriminator；
One electric phase discriminator, be used for the output signal of low noise acoustoelectric amplipher and the voltage-controlled electric signal of the local oscillator of optical-electronic oscillator into
Row frequency discrimination, output include the ac signal of stable phase angle information, and are inputted to the second mode-locked laser；
One light wavelength division multiplexing is used to pass through frequency different channels to the optical signal of the first light output end (f) of photo-coupler
Change output；
One photodetector array, is used for the optical signal of opto-electronic conversion channelizing output, and exports stablizing originally for different frequency
Shake signal.
2. more microwave local oscillator generation systems of the double mode-locked laser based on optical phase-locked loop as described in claim 1,
It is characterized in that：First mode-locked laser and the second mode-locked laser are based on quantum dot mode-locked laser or optical fiber mode-locked laser
Device.
3. more microwave local oscillator generation systems of the double mode-locked laser based on optical phase-locked loop as claimed in claim 2,
It is characterized in that：The Mould locking machine of first mode-locked laser and the second mode-locked laser is made as active mode locking mechanism either passive mode-locking
Mechanism.
4. more microwave local oscillator generation systems of the double mode-locked laser based on optical phase-locked loop as described in claim 1,
It is characterized in that：The repetition rate of first mode-locked laser and the second mode-locked laser is different.
5. more microwave local oscillator generation systems of the double mode-locked laser based on optical phase-locked loop as described in claim 1,
It is characterized in that：The electrooptic modulator is acousto-optic modulator or double flat weighing apparatus mach zhender intensity modulator.
6. more microwave local oscillator generation systems of the double mode-locked laser based on optical phase-locked loop as described in claim 1,
It is characterized in that：The optical filter is tunable narrow-band bandpass filter.
7. more microwave local oscillator generation systems of the double mode-locked laser based on optical phase-locked loop as described in claim 1,
It is characterized in that：The signal of the wherein described optical-electronic oscillator output electric signal and the output of low noise acoustoelectric amplipher is same frequency letter
Number.
8. more microwave local oscillator generation systems of the double mode-locked laser based on optical phase-locked loop as described in claim 1,
It is characterized in that：The wherein described optical-electronic oscillator output electric signal is different from the frequency for the signal that low noise acoustoelectric amplipher exports,
The output end of the electricity phase discriminator is connected to the electrical input (c) of electrooptic modulator, and the second lock is loaded by electrooptic modulator
In the Different lightwave length of mode laser.
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| CN107390232B (en) * | 2017-06-26 | 2019-02-05 | 南京牧镭激光科技有限公司 | A kind of Doppler lidar wind detection method and device |
| CN107976816B (en) * | 2017-11-21 | 2019-09-20 | 清华大学 | The double-colored light source that is concerned with generates system |
| CN111916982B (en) * | 2020-07-02 | 2021-11-02 | 中国空间技术研究院 | Optical local oscillator generation system and method |
| CN112332911B (en) * | 2020-11-09 | 2022-01-18 | 南京航空航天大学 | Microwave phase discrimination device and phase locking device based on microwave photon technology |
| CN113253208A (en) * | 2021-05-06 | 2021-08-13 | 河北大学 | Step frequency radar based on Fourier mode-locked photoelectric oscillator |
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| WO2002099939A2 (en) * | 2001-06-07 | 2002-12-12 | University College London | Optical frequency synthesizer |
| US8023540B2 (en) * | 2009-05-26 | 2011-09-20 | Redfern Integrated Optics, Inc. | Pair of optically locked semiconductor narrow linewidth external cavity lasers with frequency offset tuning |
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