CN107171733A - Reconfigurable microwave photon notch filter - Google Patents
Reconfigurable microwave photon notch filter Download PDFInfo
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- CN107171733A CN107171733A CN201710446506.9A CN201710446506A CN107171733A CN 107171733 A CN107171733 A CN 107171733A CN 201710446506 A CN201710446506 A CN 201710446506A CN 107171733 A CN107171733 A CN 107171733A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/54—Intensity modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/504—Laser transmitters using direct modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/5165—Carrier suppressed; Single sideband; Double sideband or vestigial
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/58—Compensation for non-linear transmitter output
Abstract
The invention discloses reconfigurable microwave photon notch filter, belong to Microwave photonics technical field, be made up of laser, dual drive mach zhender intensity modulator, optoisolator, vector network analyzer, highly nonlinear optical fiber, intensity modulator, the first microwave signal source, the second microwave signal source, double parallel mach zhender intensity modulator, the first D.C. regulated power supply, the second D.C. regulated power supply, the 3rd D.C. regulated power supply, the 4th D.C. regulated power supply, the 5th D.C. regulated power supply, optical circulator and photodetector；The present invention is amplified based on stimulated Brillouin scattering effect caused by intensity modulated and pump signal, gain spectral to top band strength, makes correspondence position intensity identical, realizes the trap output of microwave photon filter；And by changing the number and frequency of pump signal, realize the reconstruct of trap number, trap frequency and trap spectral pattern.
Description
Technical field
The invention belongs to Microwave photonics technical field, and in particular to one kind is dissipated based on highly nonlinear optical fiber excited Brillouin
Penetrate the tunable trap microwave photon filter of restructural of effect, one or more pump signal.
Background technology
With developing rapidly for radio communication, radar and remote sensing technology, microwave frequency resource is more and more nervous, and people also get over
More to pay attention to processing procedure and preservation approach to useful microwave signal.Can also exist in the microwave signal of more sophisticated simultaneously
The unwanted microwave interference signal of increasing people, affects accurate reception of the people to signal, so research trap filter
Ripple device is increasingly becoming a focus.Notch filter is decayed rapidly input signal in some Frequency point, and this is hindered to reach
The filter effect that frequency signal passes through.From the perspective of the frequency range by signal, notch filter belongs to bandreject filtering
One kind of device, simply its stopband is very narrow.With in the past in traditional electrical domain process signal method, can not accurately eliminate
Or weaken interference signal.And whole process loss is big, speed is slow, anti-electromagnetic interference capability is weak.So with light-carried wireless electricity
(RoF) development of technology, the research of the trap microwave photon filter with flexible reconstruction property has more wide significance.
The content of the invention
It is an object of the invention to provide it is a kind of based on stimulated Brillouin scattering effect, one or more pump signal can
Reconstruct tunable microwave photon filter.
The structure of restructural trap microwave photon filter of the present invention is as shown in figure 1, by laser, dual drive horse
Conspicuous Zeng Deer intensity modulators (DDMZM), optoisolator, vector network analyzer, highly nonlinear optical fiber, intensity modulator,
One microwave signal source, the second microwave signal source, double parallel mach zhender intensity modulator (DPMZM), the first DC voltage-stabilizing electricity
Source, the second D.C. regulated power supply, the 3rd D.C. regulated power supply, the 4th D.C. regulated power supply, the 5th D.C. regulated power supply, ring of light shape
Device and photodetector composition；
Wherein, laser includes first laser device and second laser, and first laser device output frequency is fc1Optical signal
It is sent to as light carrier in dual drive mach zhender intensity modulator；Two are had inside dual drive MZ Mach-Zehnder
Individual branch road, is shown in Fig. 2, and two branch roads are connected to same rf inputs, and tie point has a direct current biasing end, with the 5th direct current
Voltage-stabilized power supply connects, and the voltage at regulation direct-current bias end can change dual drive MZ Mach-Zehnder tie point optical signal
Phase, dual drive MZ Mach-Zehnder is operated in double sideband modulation state；Have one by what Network Analyzer was exported
The small size microwave signal to be filtered for determining frequency bandwidth is loaded on light carrier by dual drive mach zhender intensity modulator,
A series of different single order upper side bands of the opposite in phase that exports afterwards, intensity and lower sideband signal enter Gao Fei through optoisolator
In linear optical fiber, and by adjusting the DC offset voltage of the 5th D.C. regulated power supply change tie point, make top band strength
Less than following band strength；
Second laser output frequency is fc2Optical signal be sent in intensity modulator, frequency is fc2Optical signal quilt
The frequency of first microwave signal source output is fpMicrowave signal modulation (in the course of work of wave filter, fpFrequency can root
It is changed according to the requirement that frequency range is exported to wave filter), the output of the 4th D.C. regulated power supply of adjustment changes intensity modulator
Dc bias makes the double sideband modulation state that it is operated in carrier wave suppression, then after being exported through intensity modulator, the frequency of occurrences is fc2
±fp、fc2±2fp、…、fc2±n*fpA series of upper and lower sidebands, carrier wave and remaining sideband be ignored, and this is a series of
Upper and lower sideband signals are continued to be fed into double parallel mach zhender intensity modulator；
Double parallel Mach-Zehnder modulators are by the first Mach-Zehnder modulators, the second Mach-Zehnder modulators
With phase shifter composition, Fig. 3 is seen, the first Mach-Zehnder modulators are separately formed the 3rd branch road, the modulation of the second Mach-Zehnder
Device and phase shifter constitute the 4th branch road；First Mach-Zehnder modulators and the second Mach-Zehnder modulators are that intensity is adjusted
Device processed.First Mach-Zehnder modulators have the first rf inputs and the first direct current biasing end；Second Mach-Zehnder
Modulator has the second rf inputs and the second direct current biasing end；Phase shifter only one of which DC offset voltage input, i.e.,
3rd direct current biasing end, double parallel Mach-Zehnder modulators the can be changed by adjusting the voltage at the 3rd direct current biasing end
The phase of two branch road optical signals, makes double parallel Mach-Zehnder modulators be operated in the repressed single sideband modulation state of carrier wave；
First D.C. regulated power supply is connected with the first direct current biasing end, and the second D.C. regulated power supply is connected with the second direct current biasing end, the
Three D.C. regulated power supplies are connected with the 3rd direct current biasing end, and the first rf inputs are connected with the second microwave signal source, and second penetrates
Frequency input terminal is grounded；The second microwave signal source inputs microwave frequency v simultaneouslyBMicrowave signal, vBFor the high non-linearity in the system
The excited Brillouin frequency shift amount of optical fiber, so foring fc2+fp+vB、fc2+2fp+vB、…、fc2+n*fp+vBA series of optical signals,
Then input optical circulator by 1 port of optical circulator and output is entered in highly nonlinear optical fiber by 2 ports, be used as Gao Fei
The pump signal of linear optical fiber stimulated Brillouin scattering；
Dual drive MZ Mach-Zehnder output through optoisolator enter the opposite in phase in highly nonlinear optical fiber, on
N number of pump signal that the signal and lower branch road that sideband intensity is less than following band strength are exported phase interaction in highly nonlinear optical fiber
With, occur stimulated Brillouin scattering after, be input to by 2 ports of circulator in optical circulator, 3 ports from optical circulator are defeated
Go out, send into vector network analyzer after then carrying out opto-electronic conversion by photodetector, it is surveyed by vector network analyzer
Examination, so as to realize tunable trap output.
First laser device output frequency is fc1Optical signal be used as light carrier；By Network Analyzer export it is a series of to be filtered
The small size microwave signal of ripple (is f including frequencym1、fm2、fm3……fmnSignal, and fm2-fm1＜ 2vB,vBTo be excited cloth
In deep frequency shift amount) be loaded into by dual drive intensity modulator on light carrier, a series of different of the opposite in phase of output, intensity
Upper side band and lower sideband signal (Fig. 4 (1)) are entered in highly nonlinear optical fiber through optoisolator；Second laser output frequency is
fc2Optical signal be sent in intensity modulator, frequency is fc2Optical signal then by the first microwave signal source export frequency
For fpMicrowave signal modulation (in the course of work of wave filter, fPFrequency can according to wave filter export frequency range requirement
It is changed), the Dc bias of adjustment intensity modulator makes the double sideband modulation state that it is operated in carrier wave suppression, modulation output
A series of upper and lower sidebands (Fig. 4 (2)), carrier wave is ignored, and a series of this upper and lower sideband signals continues to be fed into double parallel Mach
Zeng Deer modulators, the frequency then exported by the second microwave signal source is vBMicrowave signal modulation, adjustment Dc bias make
It is operated in single sideband modulation state, only exports a series of upper side bands (Fig. 4 (3)), then the 1 port input by circulator and by
The output of 2 ports is entered in highly nonlinear optical fiber, is used as the pump signal of highly nonlinear optical fiber stimulated Brillouin scattering.
For the modulated signal in Fig. 4 (1), top band strength is increased due to stimulated Brillouin scattering effect at certain frequency
Qiang Shi, now its upper side band is equal with lower sideband corresponding section intensity, and to go out lower sideband intensity still different for other frequencies, because
This, microwave signal herein will be filtered it is defeated remove, and then generate trap.
By the frequency f for changing second laserc2, it is possible to change the value of two trap centre frequencies, realize in trap
The change of frequency of heart, i.e. regulable center frequency are humorous.
The restructural trap microwave photon filter of the present invention has three kinds of working conditions：
Situation one：Work as fp=2vBWhen, previous pump signal loss spectra and latter pumping adjacent thereto letter in Fig. 4 (3)
Number gain spectral frequency is identical, cancels out each other, and wave filter exports single trap, and the loss spectral pattern of trap spectral pattern and excited Brillouin
Identical, the frequency range of wave filter depends on the quantity of pump signal.
1) when introducing a pump signal, the frequency range of notch filter is 2vB：
2) when introducing two pump signals, the frequency range of notch filter is 4vB：
3) when introducing three pump signals, the frequency range of notch filter is 6vB：
Situation two：Work as fp>2vBWhen, wave filter can produce multiple traps.Pump signal number is different, and trap number is not
Together.
1) when introducing two pump signals, two traps, and the loss spectral pattern of trap spectral pattern and excited Brillouin are produced；
2) when introducing three pump signals, three traps, and the loss spectral pattern of trap spectral pattern and excited Brillouin are produced
It is identical：
Situation three：When 0<fp<vBWhen, the gain spectral that multiple pump signals are produced is overlapped mutually, and is produced a bandwidth and is broadened
Trap, situation when Figure 10 is the superposition of four pump signals.
The present invention is that (respective frequencies are f to 1550nm from wavelengthc1=193.41448903THz) first laser device carry
Wave source, the frequency range of second laser is 193.41THz~193.45THz (corresponding wavelength 1549.7nm-1550nm), double
A length of 1530nm~the 1580nm of light wave of mach zhender intensity modulator work is driven, with a width of 25GHz；Network Analyzer
Frequency range is 40MHz~40GHz；Photodetector detective bandwidth is 20GHz；The excited Brillouin gain of highly nonlinear optical fiber
Line width is ΓB=30MHz, Brillouin shift amount vB=10GHz, fiber lengths are 1000 meters, and gain and loss peak are 5dB；Light
The isolation of isolator is more than 40dB；The a width of 20GHz of band of intensity modulator；The reference frequency output of microwave signal source is
40MHz~10GHz.
First the frequency of setting second laser is also 193.41448903THz, then no matter introduces how many pump signals, all
Can be in the lower frequency offset centered on each pump signal from generation trap at micro- Brillouin shift 10GHz.Pump signal
Number is different, and trap centre frequency and tuning range are also different.
Compared with prior art, restructural trap microwave photon filter of the present invention has the following advantages that：
(1) based on stimulated Brillouin scattering effect caused by intensity modulated and pump signal, gain spectral is to top band strength
It is amplified, makes correspondence position intensity identical, realizes the trap output of microwave photon filter.
(2) by changing the number and frequency of pump signal, the weight of trap number, trap frequency and trap spectral pattern is realized
Structure.
Brief description of the drawings
Fig. 1：Trap microwave photon filter construction schematic diagram；
Fig. 2：The structural representation of dual drive Mach-Zehnder modulators；
Fig. 3：The structural representation of double parallel Mach-Zehnder modulators；
Fig. 4：Trap microwave photon filter frequency spectrum processing process schematic；
Fig. 5：Produce when a trap introduces a pump signal and compose result figure；
Fig. 6：Produce when a trap introduces two pump signals and compose result figure；
Fig. 7：Produce when a trap introduces three pump signals and compose result figure；
Fig. 8：Produce when multiple traps introduce two pump signals and compose result figure；
Fig. 9：Produce when multiple traps introduce three pump signals and compose result figure；
Figure 10：Trap is superimposed the spectrum result figure of broadening by gain spectral；
Figure 11：Produce result analogous diagram when a trap introduces two pump signals；
Figure 12：Produce result analogous diagram when a trap introduces three pump signals；
Figure 13：Produce result analogous diagram when multiple traps introduce two pump signals；
Figure 14：Produce result analogous diagram when multiple traps introduce three pump signals；
Embodiment
Embodiment 1
First laser device and the TSL-510 tunable lasers that second laser is Santec companies, the ripple of first laser device
Length is set as that (respective frequencies are f to 1550nmc1=193.41448903THz), the wavelength of second laser is also set to 1550nm, double
Drive MZDD-LN-10, its bandwidth 25GHz that mach zhender intensity modulator is Photline companies；Network Analyzer is peace
The 8722ES vector network analyzers of prompt human relations, frequency range is 40MHz-40GHz；The photodetector of Imtech, with a width of
20GHz；The isolation of isolator is more than 40dB；The highly nonlinear optical fiber of Yangtze Optical Fiber and Cable Company Ltd, highly nonlinear optical fiber
Brillouin gain line width be ΓB=30MHz, Brillouin shift is 10GHz, and fiber lengths are 1000 meters, gain and loss peak
It is worth for 5dB；Intensity modulator is the MXAN-LN-20 of Photline companies, and with a width of 20GHz, Dc bias is 9V, can make this
Modulator is output as the double sideband modulation of carrier wave suppression, and the frequency added by intensity modulator is fpSignal by the first microwave signal
Source is provided；The microwave signal generator E8257D of Agilent company, reference frequency output is 100kHz~20GHz；Double parallel horse
Conspicuous Zeng Deer intensity modulators are the MXIQ-LN-40 of Photline companies, and its band is wider than 20GHz.The P/N of optical circulator：
FCIR-55-2-L-1-1 (SR5905), QTY:1PC.
Corresponding instrument and equipment is connected by Fig. 1, the frequency setting of first laser device is fc1=193.41448903THz,
Network Analyzer reference frequency output is loaded for 40MHz~40GHz microwave signal by dual drive MZ Mach-Zehnder
Onto light carrier, the signal of output after isolator by entering in highly nonlinear optical fiber.In another branch road, second laser is defeated
The frequency gone out is fc2=193.41448903THz optical signal is first into intensity modulator, is sent out by the first microwave signal
The microwave gone out is modulated, and now microwave frequency is set to fp=2vB=20GHz, the output frequency of intensity modulator is fc2±nfp's
A series of lower sidebands, are admitted in double parallel MZ Mach-Zehnder, produce the pump signal of single sideband modulation, then pass through
1 port of circulator is entered in highly nonlinear optical fiber.In highly nonlinear optical fiber, detectable signal and pump signal phase interaction
With generation stimulated Brillouin scattering effect, the frequency interval with pump signal is vBThe signal of lower frequency zone position will be increased
By force, make lower sideband intensity identical, so as to realize that trap is exported.Figure 11 is to work as fp=2vB=20GHz, and introduce two pumping letters
Number when, the output result of wave filter, trap is 4v with interference the distance between passbandB, i.e. 40GHz.
Embodiment 2
Corresponding instrument and equipment is connected by Fig. 1, the frequency setting of first laser device is fc1=193.41448903THz,
Network Analyzer reference frequency output is loaded for 40MHz~40GHz microwave signal by dual drive MZ Mach-Zehnder
Onto light carrier, the signal of output after isolator by entering in highly nonlinear optical fiber.In another branch road, second laser is defeated
The frequency gone out is still set as fc2=193.41448903THz optical signal is first into intensity modulator, by the first microwave
The microwave of signal is modulated, and the output frequency of intensity modulator is fc2±nfpA series of lower sidebands, be admitted to double parallel horse
In conspicuous Zeng Deer modulators, the pump signal of single sideband modulation is produced, then high non-linearity light is entered by 1 port of circulator
In fibre.In highly nonlinear optical fiber, stimulated Brillouin scattering effect occurs for detectable signal and pump signal interaction, with pump
The frequency interval of Pu signal is vBThe signal of lower frequency zone position will be enhanced, make lower sideband intensity identical, so as to realize
Trap is exported.Figure 12 is to work as fp=2vB=20GHz, and when introducing three pump signals, the output result of wave filter, trap is with doing
The distance between passband is disturbed for 6vB, i.e. 60GHz.
Embodiment 3
Corresponding instrument and equipment is connected by Fig. 1, the frequency setting of first laser device is fc1=193.41448903THz,
Network Analyzer reference frequency output is loaded into light by dual drive intensity modulator for 40MHz~40GHz microwave signal and carried
On ripple, the signal of output after isolator by entering in highly nonlinear optical fiber.In another branch road, the frequency of second laser output
Rate is still set as fc2=193.41448903THz optical signal is first into intensity modulator, by the first microwave signal
Microwave is modulated, and the output frequency of intensity modulator is fc2±nfpA series of lower sidebands, be admitted to double parallel Mach Zeng De
In your modulator, the pump signal of single sideband modulation is produced, then is entered by 1 port of circulator in highly nonlinear optical fiber.
In highly nonlinear optical fiber, stimulated Brillouin scattering effect occurs for detectable signal and pump signal interaction, with pump signal
Frequency interval be vBThe signal of lower frequency zone position will be enhanced, make lower sideband intensity identical, so as to realize that trap is defeated
Go out.Figure 13 is to work as fp=35GHz>2vB, and when introducing two pump signals, the output result of wave filter occurs in that two traps.
Embodiment 4
Corresponding instrument and equipment is connected by Fig. 1, the frequency setting of first laser device is fc1=193.41448903THz,
Network Analyzer reference frequency output is loaded for 40MHz~40GHz microwave signal by dual drive MZ Mach-Zehnder
Onto light carrier, the signal of output after isolator by entering in highly nonlinear optical fiber.In another branch road, second laser is defeated
The frequency gone out is still set as fc2=193.41448903THz optical signal is first into intensity modulator, by the first microwave
The microwave of signal is modulated, and the output frequency of intensity modulator is fc2±nfpA series of lower sidebands, be admitted to double parallel horse
In conspicuous Zeng Deer modulators, the pump signal of single sideband modulation is produced, then high non-linearity light is entered by 1 port of circulator
In fibre.In highly nonlinear optical fiber, stimulated Brillouin scattering effect occurs for detectable signal and pump signal interaction, with pump
The frequency interval of Pu signal is vBThe signal of lower frequency zone position will be enhanced, make lower sideband intensity identical, so as to realize
Trap is exported.Figure 14 is to work as fp=35GHz>2vB, and when introducing three pump signals, the simulation result of wave filter occurs in that three
Individual trap.
Claims (5)
1. restructural trap microwave photon filter, it is characterised in that by laser, dual drive mach zhender intensity modulator
(DDMZM), optoisolator, vector network analyzer, highly nonlinear optical fiber, intensity modulator, the first microwave signal source, second micro-
Ripple signal source, double parallel mach zhender intensity modulator (DPMZM), the first D.C. regulated power supply, the second D.C. regulated power supply,
3rd D.C. regulated power supply, the 4th D.C. regulated power supply, the 5th D.C. regulated power supply, optical circulator and photodetector composition；
Wherein, laser includes first laser device and second laser, and first laser device output frequency is fc1Optical signal conduct
Light carrier is sent in dual drive mach zhender intensity modulator；Two branch are had inside dual drive MZ Mach-Zehnder
Road, two branch roads are connected to same rf inputs, and tie point has a direct current biasing end, with the 5th D.C. regulated power supply phase
Connect, the voltage at regulation direct-current bias end can change the phase of dual drive MZ Mach-Zehnder tie point optical signal, make
Dual drive MZ Mach-Zehnder is operated in double sideband modulation state；There is certain frequency bandwidth by what Network Analyzer was exported
Small size microwave signal to be filtered be loaded into by dual drive mach zhender intensity modulator on light carrier, export afterwards
A series of different single order upper side bands of opposite in phase, intensity and lower sideband signal enter highly nonlinear optical fiber through optoisolator
In, and by adjusting the DC offset voltage of the 5th D.C. regulated power supply change tie point, it is less than top band strength following
Band strength；
Second laser output frequency is fc2Optical signal be sent in intensity modulator, frequency is fc2Optical signal it is micro- by first
The frequency of ripple signal source output is fpMicrowave signal modulation, adjustment the 4th D.C. regulated power supply output change intensity modulator
Dc bias make its be operated in carrier wave suppression double sideband modulation state, then after being exported through intensity modulator, the frequency of occurrences is
fc2±fp、fc2±2fp、…、fc2±n*fpA series of upper and lower sidebands, carrier wave and remaining sideband be ignored, and this is a series of
Upper and lower sideband signals are continued to be fed into double parallel mach zhender intensity modulator；
Double parallel Mach-Zehnder modulators are by the first Mach-Zehnder modulators, the second Mach-Zehnder modulators and shifting
Phase device is constituted, and the first Mach-Zehnder modulators are separately formed the 3rd branch road, the second Mach-Zehnder modulators and phase shifter
Constitute the 4th branch road；First Mach-Zehnder modulators and the second Mach-Zehnder modulators are intensity modulator；First
Mach-Zehnder modulators have the first rf inputs and the first direct current biasing end；Second Mach-Zehnder modulators have
Second rf inputs and the second direct current biasing end；Phase shifter only one of which DC offset voltage input, i.e. the 3rd direct current is inclined
End is put, the second branch road of double parallel Mach-Zehnder modulators light letter can be changed by adjusting the voltage at the 3rd direct current biasing end
Number phase, double parallel Mach-Zehnder modulators is operated in the repressed single sideband modulation state of carrier wave；First direct current is steady
Voltage source is connected with the first direct current biasing end, and the second D.C. regulated power supply is connected with the second direct current biasing end, the 3rd DC voltage-stabilizing
Power supply is connected with the 3rd direct current biasing end, and the first rf inputs are connected with the second microwave signal source, and the second rf inputs connect
Ground；The second microwave signal source inputs microwave frequency v simultaneouslyBMicrowave signal, vBFor being excited for the highly nonlinear optical fiber in the system
Brillouin shift amount, so foring fc2+fp+vB、fc2+2fp+vB、…、fc2+n*fp+vBA series of optical signals, then by light
Circulator 1 port input optical circulator and by 2 ports output enter in highly nonlinear optical fiber, as highly nonlinear optical fiber by
Swash the pump signal of Brillouin scattering；
Opposite in phase, upper side band that the output of dual drive MZ Mach-Zehnder is entered in highly nonlinear optical fiber through optoisolator
Intensity is less than the signal of following band strength and N number of pump signal of lower branch road output interacts in highly nonlinear optical fiber, sends out
After raw stimulated Brillouin scattering, it is input in optical circulator, is exported from 3 ports of optical circulator, so by 2 ports of circulator
Vector network analyzer is sent into after carrying out opto-electronic conversion by photodetector afterwards, it is tested by vector network analyzer, from
And realize tunable trap output.
2. restructural trap microwave photon filter as claimed in claim 1, it is characterised in that it is 1550nm's to select wavelength
First laser device makees carrier wave light source, and respective frequencies are fc1=193.41448903THz；The frequency range of second laser is
193.41THz~193.45THz, corresponding wavelength 1549.7nm-1550nm.
3. restructural trap microwave photon filter as claimed in claim 1, it is characterised in that the dual drive Mach Zeng De
A length of 1530nm~the 1580nm of light wave of your intensity modulator work, with a width of 25GHz.
4. restructural trap microwave photon filter as claimed in claim 1, it is characterised in that the frequency of the Network Analyzer
Rate scope is 40MHz~40GHz；Photodetector detective bandwidth is 20GHz；The excited Brillouin gain line of highly nonlinear optical fiber
A width of ΓB=30MHz, Brillouin shift amount vB=10GHz, fiber lengths are 1000 meters, and gain and loss peak are 5dB.
5. restructural trap microwave photon filter as claimed in claim 1, it is characterised in that the isolation of the optoisolator
Degree is more than 40dB；The a width of 20GHz of band of intensity modulator；The reference frequency output of microwave signal source is 40MHz~10GHz.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111953425A (en) * | 2020-08-04 | 2020-11-17 | 中国舰船研究设计中心 | High-sensitivity photon-assisted ultra-wideband millimeter wave receiver |
| CN113391121A (en) * | 2020-03-13 | 2021-09-14 | 西安电子科技大学 | Method for realizing instantaneous frequency measurement based on frequency response monitoring |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113391121A (en) * | 2020-03-13 | 2021-09-14 | 西安电子科技大学 | Method for realizing instantaneous frequency measurement based on frequency response monitoring |
| CN113391121B (en) * | 2020-03-13 | 2022-08-02 | 西安电子科技大学 | Method for realizing instantaneous frequency measurement based on frequency response monitoring |
| CN111953425A (en) * | 2020-08-04 | 2020-11-17 | 中国舰船研究设计中心 | High-sensitivity photon-assisted ultra-wideband millimeter wave receiver |
| CN111953425B (en) * | 2020-08-04 | 2021-05-28 | 中国舰船研究设计中心 | High-sensitivity photon-assisted ultra-wideband millimeter wave receiver |
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