CN105827330A - Method and system for millimeter wave generation - Google Patents
Method and system for millimeter wave generation Download PDFInfo
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- CN105827330A CN105827330A CN201610367547.4A CN201610367547A CN105827330A CN 105827330 A CN105827330 A CN 105827330A CN 201610367547 A CN201610367547 A CN 201610367547A CN 105827330 A CN105827330 A CN 105827330A
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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
- H04B10/505—Laser transmitters using external 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
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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
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/806—Arrangements for feeding power
- H04B10/808—Electrical power feeding of an optical transmission system
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention provides a method and a system for millimeter wave generation. The method comprises steps that an LiNb-MZM1 and an LiNb-MZM2 are driven by a local oscillator signal after the local oscillator signal is amplified by an electrical amplifier; laser is injected into the LiNb-MZM1, light carrier waves outputted by the LiNb-MZM1 are divided into two paths, one path of light carrier waves is injected into the LiNb-MZM2, filtering processing on the other path of light carrier waves is carried out, after modulation through the LiNb-MZM2, wavelength division multiplexing de-multiplexing processing and base-band data modulation processing on the one path of light carrier waves, path coupling for the other path of light carrier waves and the one path of light carrier waves is realized, and a photoelectric detector is utilized to carry out beat frequency of light signals acquired through coupling to acquire two millimeter waves satisfying preset frequencies. According to the method, a cascade type lithium niobate Mach-Zehnder modulator is utilized to generate coherent light carrier waves, bias points of the modulator are respectively arranged at a largest transmission point, power supply through a DC offset voltage source for the modulator is not needed, the system structure is simplified, under the condition of low system complexity, the relatively large frequency multiplication number is acquired, two millimeter waves are simultaneously generated, and system cost is reduced.
Description
Technical field
The application relates to communication technical field, particularly relates to production method and the system of a kind of millimeter wave.
Background technology
Along with the explosive growth of communication service in communication system, low-frequency range is the most extremely blocked up, hyperfrequency
Section, i.e. millimeter wave band (tens GHz are to the frequency range of hundreds of GHz) is owing to can provide faster information
Transfer rate and bigger message capacity and obtained more concern.
At present, in light carrier radio communication system, generally use external modulator and produce many same frequencys
The coherent light carrier wave at interval, then uses wavelength-selective switches to select two light carriers needed, Yi Tiaolu
Footpath uses intensity modulator modulating baseband data, and a paths is not modulated data, is combined in two
It is transmitted together, finally utilizes photodetector beat frequency to obtain a millimeter wave.
But, currently used method, have in order to obtain the biggest coherent light carrier wave of frequency and significantly
Add the complexity of system so that system is excessively heavy and cost also can increase, the horse of some systems
Conspicuous increasing Dare manipulator needs to use more DC offset voltage to be powered manipulator, and direct current is inclined
The voltage putting voltage source has bigger voltage drift, meeting in the case of not having complicated voltage control circuit
Generation to light carrier adversely affects.
Summary of the invention
In view of this, this application provides production method and the system of a kind of millimeter wave, to overcome existing skill
In art, system complexity is too big and the voltage drift due to bias DC voltage source thus the product to light carrier
The raw problem adversely affected.
To achieve these goals, this application provides techniques below scheme:
A kind of production method of millimeter wave, the method includes:
Utilize electric amplifier by local oscillation signal processing and amplifying, be amplified signal；
Divide merit to process rear drive through electricity splitter described amplification signal and increase Dare at the first Lithium metaniobate Mach
Manipulator LiNb-MZM1 and the second Lithium metaniobate Mach increase on Dare manipulator LiNb-MZM2；Wherein, institute
The bias point stating LiNb-MZM1 and described LiNb-MZM2 is arranged at maximum transmitted point；
After utilizing laser instrument that laser is injected described LiNb-MZM1, utilize light splitter by described
The light carrier of LiNb-MZM1 output is divided into two paths, and wherein, a paths injects described LiNb-MZM2,
After another paths carries out wavelength-division multiplex demultiplexing process and base band data modulation treatment, and through described
LiNb-MZM2 modulation after and carry out Filtering Processing path coupling, obtain meeting pre-conditioned optical signal；
Utilize photodetector by described meet pre-conditioned optical signal carry out beat frequency with obtain meet default
Two millimeter waves of frequency.
Preferably, another paths described is filtered process and includes:
Light Rectangular Band-pass Filter is utilized to be filtered another paths processing, to obtain+2 rank light carriers.
Preferably, described through described LiNb-MZM2 modulate after and carry out wavelength-division multiplex demultiplexing process with
And the method that the path of base band data modulation treatment is specifically filtered processing includes:
Utilize Wave division multiplexer/demultiplexer filter out described LiNb-MZM2 outfan ± 4 rank light carriers；
Light intensity modulator is utilized to be modulated by base band data on described-4 rank light carriers；
-4 rank light carriers after modulation are coupled with described+4 rank light carriers.
Preferably, described utilize photodetector by described meet pre-conditioned optical signal carry out beat frequency with
Acquisition meets the millimeter wave of predeterminated frequency and includes:
Described photo-detector meets pre-conditioned optical signal carry out heterodyne beat process by described, is clapped
The signal of telecommunication after Pin；
The signal of telecommunication after described beat frequency is carried out bandpass filtering treatment by electricity band filter, obtains filtered
Meet two millimeter waves of predeterminated frequency.
Preferably, also include: utilize electricity Amplitude Demodulators and bit error rate survey meter that described millimeter wave is carried out
Quality testing.
A kind of generation system of millimeter wave, this system includes:
Signal amplifying apparatus, is used for utilizing electric amplifier by local oscillation signal processing and amplifying, is amplified signal；
Divide merit device, for dividing merit to process rear drive at the first niobium through electricity splitter described amplification signal
Acid lithium Mach increases Dare manipulator LiNb-MZM1 and the second Lithium metaniobate Mach increases Dare manipulator
On LiNb-MZM2；Wherein, the bias point of described LiNb-MZM1 and described LiNb-MZM2 is arranged at
Maximum transmitted point；
Processing means, after being used for utilizing laser instrument that laser is injected described LiNb-MZM1, utilizes light point merit
The light carrier that described LiNb-MZM1 exports is divided into two paths by device, and wherein, a paths injects described
LiNb-MZM2, another paths be filtered process after, with through described LiNb-MZM2 modulate after also
Carry out the path coupling of wavelength-division multiplex demultiplexing process and base band data modulation treatment, obtain meeting default
The optical signal of condition；
Acquisition device, for utilizing photodetector to meet pre-conditioned optical signal carry out beat frequency by described
To obtain two millimeter waves meeting predeterminated frequency.
Preferably, described processing means includes: light Rectangular Band-pass Filter, for entering another paths
Row Filtering Processing, to obtain+2 rank light carriers.
Preferably, described processing means includes:
Wave division multiplexer/demultiplexer, for filter out described LiNb-MZM2 outfan ± 4 rank light carriers；
Light intensity modulator, for modulating described-4 rank light carriers by base band data；
First photo-coupler, for coupling-4 rank light carriers after modulation with described+4 rank light carriers.
Preferably, described acquisition device includes:
Described photo-detector, for meeting pre-conditioned optical signal carry out heterodyne beat process by described,
Obtain the signal of telecommunication after beat frequency；
Electricity band filter, for the signal of telecommunication after described beat frequency is carried out bandpass filtering treatment, is filtered
Two millimeter waves meeting predeterminated frequency after ripple.
Preferably, described acquisition device also includes: quality detection device, is used for utilizing electricity Amplitude Demodulators
With bit error rate survey meter, described millimeter wave is carried out quality testing.
From above technical scheme, this application provides production method and the system of a kind of millimeter wave, should
Method includes: utilizes electric amplifier by local oscillation signal processing and amplifying, is amplified signal；By described amplification
Signal divides merit to process rear drive at the first Lithium metaniobate Mach increasing Dare manipulator through electricity splitter
LiNb-MZM1 and the second Lithium metaniobate Mach increase on Dare manipulator LiNb-MZM2；Laser instrument is utilized to swash
After light injects described LiNb-MZM1, light splitter is utilized to be divided by the light carrier that described LiNb-MZM1 exports
Being two paths, wherein, a paths injects described LiNb-MZM2, and another paths is filtered place
After reason, with through described LiNb-MZM2 modulate after and carry out wavelength-division multiplex demultiplexing process and base band number
Couple according to the path of modulation treatment, obtain meeting pre-conditioned optical signal；Utilize photodetector by institute
State and meet pre-conditioned optical signal and carry out beat frequency and meet two millimeter waves of predeterminated frequency to obtain.The party
Method uses cascade connection type Lithium metaniobate Mach to increase Dare manipulator and produces coherent light carrier wave, and the bias point of manipulator is equal
Being arranged on maximum transmitted point, the i.e. difference of two DC offset voltages is 0V, so need not direct current biasing
Manipulator is powered by voltage source, simplifies system structure, and avoids the introducing of voltage drift, this
Outward, in system complexity than in the case of relatively low, it is thus achieved that bigger frequency, and two can be produced simultaneously
Individual millimeter wave, reduces system cost.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
The flow chart of the production method of a kind of millimeter wave that Fig. 1 provides for the embodiment of the present application one；
The flow chart of the production method of a kind of millimeter wave that Fig. 2 provides for the embodiment of the present application two；
The method flow diagram of Filtering Processing is carried out after a kind of modulation that Fig. 3 provides for the embodiment of the present application two；
The structural representation of the generation system of a kind of millimeter wave that Fig. 4 provides for the embodiment of the present application three；
The structural representation of the generation system of a kind of millimeter wave that Fig. 5 provides for the embodiment of the present application four；
The structure chart of the generation system of a kind of millimeter wave that Fig. 6 provides for the embodiment of the present application five；
A kind of millimeter wave that Fig. 7 provides for the embodiment of the present application five produce during light carrier schematic diagram；
The eye pattern of the 45GHz millimeter wave that Fig. 8 provides for the embodiment of the present application five；
The eye pattern of the 60GHz millimeter wave that Fig. 9 provides for the embodiment of the present application five；
The error rate analyzer schematic diagram that Figure 10 provides for the embodiment of the present application five.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
For overcoming in prior art system complexity too big and due to the voltage drift of bias DC voltage source
Thus the problem that the generation of light carrier is adversely affected, this application provides the generation of a kind of millimeter wave
Method and system, concrete scheme is as described below:
Embodiment one
The embodiment of the present application one provides the production method of a kind of millimeter wave, as it is shown in figure 1, Fig. 1 is this Shen
Please the flow chart of production method of a kind of millimeter wave that provides of embodiment one.The method includes:
S101: utilize electric amplifier by local oscillation signal processing and amplifying, be amplified signal；
In this application, the type of electric amplifier can select as required, and the application is not construed as limiting；
Local oscillation signal can utilize local oscillator to produce, and does not limits.
S102: by amplification signal through electricity splitter divide merit process rear drive at LiNb-MZM1 and
On LiNb-MZM2；
Wherein, the bias point of LiNb-MZM1 and LiNb-MZM2 is arranged at maximum transmitted point；
Concrete, in this application, two electric phase shifter can be used LiNb-MZM1 and
The bias point of LiNb-MZM2 is arranged on maximum transmitted point, i.e. the difference of two DC offset voltages is 0V.
S103: after utilizing laser instrument that laser is injected LiNb-MZM1, utilizes light splitter by LiNb-MZM1
The light carrier of output is divided into two paths, and wherein, a paths injects LiNb-MZM2, another paths
Be filtered process after, with through LiNb-MZM2 modulate after and carry out wavelength-division multiplex demultiplexing process and
The path coupling of base band data modulation treatment, obtains meeting pre-conditioned optical signal；
Concrete, light splitter used in this application is point merit light splitter than 0.1, LiNb-MZM1
The light carrier of output utilizes this power splitter to be divided into two-way, wherein, and that road signal of input LiNb-MZM2
Power accounts for the 90% of LiNb-MZM1 output signal power, and another road power accounts for 10%.
S104: utilize photodetector by meet pre-conditioned optical signal carry out beat frequency with obtain meet pre-
If the two of frequency millimeter waves.
In this application, single-mode fiber can be selected as transmitting device, utilize single-mode fiber to meet pre-
If the optical signal transmission of condition is to photodetector.A pattern is only transmitted due to single-mode fiber, and without mould
Between dispersion, only exist intramodal dispersion, therefore its dispersion be little, transmission broadband is big, it is little to decay, it is adaptable to great Rong
Amount long haul communication.
Finally, utilize photodetector by meet pre-conditioned optical signal carry out beat frequency thus obtain meet
Two millimeter waves of predeterminated frequency.
From above technical scheme, the production method of this millimeter wave that the embodiment of the present application one provides, make
Increasing Dare manipulator with cascade connection type Lithium metaniobate Mach and produce coherent light carrier wave, the bias point of manipulator is respectively provided with
It is 0V at maximum transmitted point, the i.e. difference of two DC offset voltages, so need not DC offset voltage
Manipulator is powered by source, simplifies system structure, and avoids the introducing of voltage drift, additionally,
In system complexity than in the case of relatively low, it is thus achieved that bigger frequency, owing to light device is sufficiently expensive,
The application can produce two millimeter waves simultaneously, this directly reduces cost.
Embodiment two
On the basis of embodiment one, the embodiment of the present application two provides the production method of another kind of millimeter wave,
As in figure 2 it is shown, the flow chart of the production method of a kind of millimeter wave that Fig. 2 provides for the embodiment of the present application two.
The method includes:
S101: utilize electric amplifier by local oscillation signal processing and amplifying, be amplified signal；
In this application, the type of electric amplifier can select as required, and the application is not construed as limiting；
Local oscillation signal can utilize local oscillator to produce, and does not limits.
S102: by amplification signal through electricity splitter divide merit process rear drive at LiNb-MZM1 and
On LiNb-MZM2；
Wherein, the bias point of LiNb-MZM1 and LiNb-MZM2 is arranged at maximum transmitted point；
Concrete, in this application, two electric phase shifter can be used LiNb-MZM1 and
The bias voltage of LiNb-MZM2 is disposed as 0, thus the bias point of manipulator is arranged on maximum transmitted point
On, i.e. ensure that the difference of two DC offset voltages is 0V.
S103: after utilizing laser instrument that laser is injected LiNb-MZM1, utilizes light splitter by LiNb-MZM1
The light carrier of output is divided into two paths, and wherein, a paths injects LiNb-MZM2, another paths
Be filtered process after, with through LiNb-MZM2 modulate after and carry out wavelength-division multiplex demultiplexing process and
The path coupling of base band data modulation treatment, obtains meeting pre-conditioned optical signal；
Concrete, light splitter used in this application is point merit light splitter than 0.1, LiNb-MZM1
The light carrier of output utilizes this power splitter to be divided into two-way, wherein, and that road signal of input LiNb-MZM2
Power accounts for the 90% of LiNb-MZM1 output signal power, and another road power accounts for 10%.
Wherein, in order to produce two light carriers simultaneously, light rectangle bandpass filtering is used in this application
Device accounts for the path of 10% and is filtered processing another paths, i.e. power, the method being filtered processing
Including: utilize light Rectangular Band-pass Filter to be filtered this paths processing, to obtain+2 rank light carriers.
As it is shown on figure 3, Fig. 3 for the embodiment of the present application two provide a kind of modulation after carry out Filtering Processing
Method flow diagram, the i.e. light carrier to LiNb-MZM2 output are filtered the process processed, concrete,
After LiNb-MZM2 modulates and carry out the path of Filtering Processing and specifically carry out wavelength-division multiplex demultiplexing process
And the method for base band data modulation treatment includes:
S201: utilize Wave division multiplexer/demultiplexer filter out LiNb-MZM2 outfan ± 4 rank light carriers；
S202: utilize light intensity modulator to be modulated by base band data on-4 rank light carriers ,+4 rank light carriers
Do not modulate base band data；
S203: utilize the first photo-coupler to be coupled with+4 rank light carriers by-4 rank light carriers after modulation.
Finally utilize the second photo-coupler by+2 rank light carriers with after the modulation of the first photo-coupler coupling
-4 rank light carriers close with+4 rank light carriers and be transmitted together with ripples.
Use cascade connection type Lithium metaniobate Mach to increase Dare manipulator and produce coherent light carrier wave, the bias point of manipulator
Being arranged at maximum transmitted point, so need not bias DC voltage source, manipulator being powered, simplify
System structure, and avoid the introducing of voltage drift.
S104: utilize photodetector by meet pre-conditioned optical signal carry out beat frequency with obtain meet pre-
If the two of frequency millimeter waves.
In this application, single-mode fiber can be selected as transmitting device, utilize single-mode fiber to meet pre-
If the optical signal transmission of condition is to photodetector.A pattern is only transmitted due to single-mode fiber, and without mould
Between dispersion, only exist intramodal dispersion, therefore its dispersion be little, transmission broadband is big, it is little to decay, it is adaptable to great Rong
Amount long haul communication.
Finally, utilize photodetector by meet pre-conditioned optical signal carry out beat frequency thus obtain meet
Two millimeter waves of predeterminated frequency.
Wherein, before traveling to air, it is generally required to utilize the electricity band filter two millimeters to producing
Ripple carries out bandpass filtering treatment, obtains filtered two millimeter waves meeting predeterminated frequency.
Concrete, photo-detector carries out heterodyne beat process by meeting pre-conditioned optical signal, is clapped
The signal of telecommunication after Pin, the signal of telecommunication after beat frequency is carried out bandpass filtering treatment, is filtered by electricity band filter
Two millimeter waves meeting predeterminated frequency after ripple.
S105: utilize electricity Amplitude Demodulators and bit error rate survey meter that millimeter wave is carried out quality testing.
From above technical scheme, the production method of this millimeter wave that the embodiment of the present application two provides, make
Increasing Dare manipulator with cascade connection type Lithium metaniobate Mach and produce coherent light carrier wave, the bias point of manipulator is respectively provided with
It is 0V at maximum transmitted point, the i.e. difference of two DC offset voltages, so need not DC offset voltage
Manipulator is powered by source, simplifies system structure, and avoids the introducing of voltage drift, additionally,
In system complexity than in the case of relatively low, it is thus achieved that bigger frequency, owing to light device is sufficiently expensive,
The application can produce two millimeter waves simultaneously, this directly reduces cost, and through quality testing, can
Two the millimeter wave performances learning output are good.
Embodiment three
On the basis of embodiment one, the embodiment of the present application three provides the generation system of a kind of millimeter wave,
As shown in Figure 4, the structural representation of the generation system of a kind of millimeter wave that Fig. 4 provides for the embodiment of the present application three
Figure.This system includes: signal amplifying apparatus 301, point merit device 302, processing means 303 and acquisition device
304, wherein,
Signal amplifying apparatus 301, is used for utilizing electric amplifier by local oscillation signal processing and amplifying, is amplified letter
Number；
In this application, signal amplifying apparatus includes local oscillator and electric amplifier.Electric amplifier incite somebody to action this
The local oscillation signal processing and amplifying that ground agitator produces, is amplified signal.
Divide merit device 302, for dividing merit to process rear drive at the first niobic acid through electricity splitter amplification signal
Lithium Mach increases Dare manipulator LiNb-MZM1 and the second Lithium metaniobate Mach increases Dare manipulator LiNb-MZM2
On；Wherein, the bias point of LiNb-MZM1 and LiNb-MZM2 is arranged at maximum transmitted point；
Processing means 303, after being used for utilizing laser instrument that laser is injected LiNb-MZM1, utilizes light point merit
The light carrier that LiNb-MZM1 exports is divided into two paths by device, and wherein, a paths injects
LiNb-MZM2, after another paths carries out wavelength-division multiplex demultiplexing process and base band data modulation treatment,
With after LiNb-MZM2 modulates and carry out the path of Filtering Processing and couple, obtain meeting pre-conditioned
Optical signal；
Acquisition device 304, for utilize photodetector by meet pre-conditioned optical signal carry out beat frequency with
Obtain two millimeter waves meeting predeterminated frequency.
From above technical scheme, the generation system of this millimeter wave that the embodiment of the present application three provides, make
Increasing Dare manipulator with cascade connection type Lithium metaniobate Mach and produce coherent light carrier wave, the bias point of manipulator is respectively provided with
It is 0V at maximum transmitted point, the i.e. difference of two DC offset voltages, so need not DC offset voltage
Manipulator is powered by source, simplifies system structure, and avoids the introducing of voltage drift, additionally,
In system complexity than in the case of relatively low, it is thus achieved that bigger frequency, owing to light device is sufficiently expensive,
The application can produce two millimeter waves simultaneously, this directly reduces cost.
Embodiment four
On the basis of embodiment three, the embodiment of the present application four provides the product of a kind of more specifically millimeter wave
Raw system, as it is shown in figure 5, the generation system of a kind of millimeter wave that provides for the embodiment of the present application four of Fig. 5
Structural representation.This system includes: signal amplifying apparatus 301, point merit device 302, processing means 303,
Acquisition device 304 and quality detection device 305, wherein,
Signal amplifying apparatus 301, is used for utilizing electric amplifier by local oscillation signal processing and amplifying, is amplified letter
Number；
In this application, signal amplifying apparatus includes local oscillator and electric amplifier.Electric amplifier incite somebody to action this
The local oscillation signal processing and amplifying that ground agitator produces, is amplified signal.
Divide merit device 302, for dividing merit to process rear drive at the first niobic acid through electricity splitter amplification signal
Lithium Mach increases Dare manipulator LiNb-MZM1 and the second Lithium metaniobate Mach increases Dare manipulator LiNb-MZM2
On；Wherein, the bias point of LiNb-MZM1 and LiNb-MZM2 is arranged at maximum transmitted point；
Processing means 303, after being used for utilizing laser instrument that laser is injected LiNb-MZM1, utilizes light point merit
The light carrier that LiNb-MZM1 exports is divided into two paths by device, and wherein, a paths injects
LiNb-MZM2, after another paths carries out wavelength-division multiplex demultiplexing process and base band data modulation treatment,
With after LiNb-MZM2 modulates and carry out the path of Filtering Processing and couple, obtain meeting pre-conditioned
Optical signal；
Wherein, processing means includes: light Rectangular Band-pass Filter, for being filtered another paths
Process, to obtain+2 rank light carriers.
Processing means also includes:
Wave division multiplexer/demultiplexer, for filter out LiNb-MZM2 outfan ± 4 rank light carriers；
Light intensity modulator, for modulating-4 rank light carriers by base band data；
First photo-coupler, for coupling-4 rank light carriers after modulation with+4 rank light carriers.
Finally, the second photo-coupler is by-4 rank light carriers after+2 rank light carriers, modulation and+4 rank light carriers
Close ripple to be transmitted together.
Acquisition device 304, for utilize photodetector by meet pre-conditioned optical signal carry out beat frequency with
Obtain two millimeter waves meeting predeterminated frequency；
Concrete, in the application, acquisition device includes:
Photo-detector, for carrying out heterodyne beat process by meeting pre-conditioned optical signal, obtains beat frequency
After the signal of telecommunication；
Electricity band filter, for carrying out bandpass filtering treatment by the signal of telecommunication after beat frequency, after being filtered
Two millimeter waves meeting predeterminated frequency.
Quality detection device 305, is used for utilizing electricity Amplitude Demodulators and bit error rate survey meter to carry out millimeter wave
Quality testing.
Concrete, in the embodiment of the present application, ground same or analogous with other embodiments can mutually reference,
Repeat no more in this application.
From above technical scheme, the generation system of this millimeter wave that the embodiment of the present application four provides, make
Increasing Dare manipulator with cascade connection type Lithium metaniobate Mach and produce coherent light carrier wave, the bias point of manipulator is respectively provided with
It is 0V at maximum transmitted point, the i.e. difference of two DC offset voltages, so need not DC offset voltage
Manipulator is powered by source, simplifies system structure, and avoids the introducing of voltage drift, additionally,
In system complexity than in the case of relatively low, it is thus achieved that bigger frequency, owing to light device is sufficiently expensive,
The application can produce two millimeter waves simultaneously, this directly reduces cost and through quality testing, can obtain
Two the millimeter wave performances knowing output are good.
Embodiment five
As shown in Figure 6, the structure of the generation system of a kind of millimeter wave that Fig. 6 provides for the embodiment of the present application five
Figure.Wherein, LD represents laser instrument；LO represents local oscillator；EA represents electric amplifier；ES table
Show electricity splitter；EPS represents electricity phase shifter；OS represents light splitter；LiNb-MZM represents niobium
Acid lithium Mach increases Dare manipulator；WDM Demux represents Wave division multiplexer/demultiplexer；PPG represents pulse
Generator；ORBPF represents light Rectangular Band-pass Filter；OC represents photo-coupler；EDFA represents er-doped
Fiber amplifier；SMF represents single-mode fiber；PD represents photodetector；EBPF represents electricity bandpass filtering
Device；EAD represents electricity Amplitude Demodulators；BERT represents bit error rate survey meter；CO represents central office；BS
Represent base station.
Wherein, the systematic parameter of each element is as follows:
LD: operating frequency 193.1THz, power 15dBm, live width 10MHz.
LiNb-MZM 1&2: insertion loss 5dB, extinction ratio 20dB, half-wave voltage 4V.
MZM 3: insertion loss 5dB, extinction ratio 20dB, half-wave voltage 4V.
LO: frequency 7.5GHz, power 4.5dBm.
EA: gain amplifier 36.5dB.
EPS 1&2: deviation angle 180 degree.
OS: point merit ratio 0.1.
ORBPF: operating frequency 193.115THz, bandwidth 10GHz, insertion loss 5dB.
The operating frequency of Demux: two passages of WDM is respectively 193.07THz and 193.13THz, bandwidth
Being 8GHz, Insertion Loss is 5dB.
PPG: bit number is 211The pseudo random number of-1.
EDFA: form is power controller, and power is 15dBm.
SMF: loss 0.2dB/km, the dispersion values at 1550nm is 16.75ps/nm/km.
PD: sensitivity 1A/W.
EBPF 1: operating frequency 45GHz, bandwidth 1.5* bit rate, insertion loss 5dB.
EBPF 2: operating frequency 60GHz, bandwidth 1.5* bit rate, insertion loss 5dB.
The result of the application uses Optisystem 9.0 software emulation to obtain.First by electric amplifier
Local oscillation signal LO is amplified by EA, then drives on LiNb-MZM 1 and LiNb-MZM 2, two manipulators
Under the effect of EPS1 and EPS2, all it is biased in maximum transmitted point.Laser instrument LD is injected into LiNb-MZM 1
In, multiple harmonic wave can be produced at outfan, what power was the highest is ± 2 rank light carriers, shown in below figure 7 (a).
Light splitter OS is that point merit is than the light splitter being 0.1, say, that the power that path above is occupied is
The 90% of LiNb-MZM 1 outfan, the power that path below is occupied is the 10% of LiNb-MZM 1 outfan
(so arrange point merit than reason be that the device of optical signal process in path above is more, insertion
It is lost bigger).Through the modulation again of LiNb-MZM 2, carrier number becomes many, as shown in Fig. 7 (b).Pass through
Use Wave division multiplexer/demultiplexer WDM Demux by LiNb-MZM 2 outfan ± 4 rank light carriers leach
Coming, then use light intensity modulator MZM 3 to be modulated by base band data on-4 rank light carriers ,+4 rank light carry
Ripple does not modulate base band data, concrete as shown in Fig. 7 (c).In order to produce two light carriers, this Shen simultaneously
+ 2 rank light that light Rectangular Band-pass Filter will account in LiNb-MZM 1 outfan 10% power path are used in please
Carrier wave leaches (as shown in Fig. 7 (d)), then carries out together with above-mentioned ± 4 rank light carriers conjunction ripples
Transmission, as shown in Fig. 7 (e).In base station BS, by photodetector, the optical signal in figure (e) is clapped
Frequently, the cleanest light carrier respectively and carries the light carrier beat frequency of base band data, will obtain two
Individual millimeter wave.Produce in the present embodiment is a 45GHz and the millimeter wave of a 60GHz, then will
The two millimeter wave is transferred in air be transmitted, it is achieved that the generation of high-frequency electrical millimeter wave, and will
Signal has arrived far place by fiber-optic transfer, overcomes high frequency electrical signal and can not be transferred in atmosphere
Shortcoming at a distance.
In the present embodiment, electricity consumption Amplitude Demodulators EAD1 and EAD2 and bit error rate survey meter BERT1 is made
It is all the checking work for producing signal quality with BERT2.In practice, photoelectric detector PD beat frequency it
After make electricity consumption band filter EBPF1 and EBPF2 filter out signal just can be propagate directly in air
?.
By analysis, the bit number in transmission is 211When-1, by the demodulation to millimeter wave, 45 obtained
As shown in Figure 8, wherein, (a) represents back-to-back to the eye pattern of GHz millimeter wave, i.e. fiber-optic transfer distance is
Eye pattern when 0, (b) represents that fiber-optic transfer distance is eye pattern during 25km, and (c) represents fiber-optic transfer
Distance is eye pattern during 50km；The eye pattern of the 60GHz millimeter wave obtained as it is shown in figure 9, wherein, (a)
Represent back-to-back, i.e. fiber-optic transfer distance is eye pattern when 0, and (b) represents that fiber-optic transfer distance is 25km
Time eye pattern, (c) represent fiber-optic transfer distance be eye pattern during 50km.Error rate analyzer situation such as figure
Shown in 10 (BTB is back-to-back transmission), wherein, (a) represents that the bit error rate of 45GHz millimeter wave is shown
Being intended to, (b) represents that the bit error rate schematic diagram of 60GHz millimeter wave, result display use the application to be adopted
Structure can produce two millimeter waves simultaneously, and when fiber-optic transfer distance is for 50km, eye pattern depends on
So open.When the bit error rate is 1 × 10-9Time, for the millimeter wave of 45GHz, merit during transmission 25km
It is 0.2dB that rate compensates, and during transmission 50km, power back-off is 0.6dB.For the millimeter wave of 60GHz,
During transmission 25km, power back-off is 0.5dB, and during transmission 50km, power back-off is 1.1dB.Result shows
The performance of produced two millimeter waves is good.
From above technical scheme, use cascade connection type Lithium metaniobate Mach to increase Dare manipulator and produce coherent light
Carrier wave, does not separate coherent light carrier wave when carrying out coherent light carrier modulation, and the bias point of manipulator is all provided with
Putting at maximum transmitted point, the i.e. difference of two DC offset voltages is 0V, so need not direct current biasing electricity
Manipulator is powered by potential source, simplifies system structure, and avoids the introducing of voltage drift, additionally,
In system complexity than in the case of relatively low, it is thus achieved that bigger frequency, and two millis can be produced simultaneously
Metric wave, 45GHz 6 times of local frequency (frequency be) and 60GHz 8 times of local oscillator (frequency be), reduce
System cost.
Finally, in addition it is also necessary to explanation, in this article, the relational terms of such as first and second or the like
It is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires
Or imply relation or the order that there is any this reality between these entities or operation.And, art
Language " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, thus
Make to include that the process of a series of key element, method, article or equipment not only include those key elements, and
Also include other key elements being not expressly set out, or also include for this process, method, article or
The key element that person's equipment is intrinsic.In the case of there is no more restriction, by statement " including ... "
The key element limited, it is not excluded that also deposit in including the process of described key element, method, article or equipment
In other identical element.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this
Application.Multiple amendment to these embodiments will be apparent for those skilled in the art
, generic principles defined herein can in the case of without departing from spirit herein or scope,
Realize in other embodiments.Therefore, the application is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (10)
1. the production method of a millimeter wave, it is characterised in that the method includes:
Utilize electric amplifier by local oscillation signal processing and amplifying, be amplified signal；
Divide merit to process rear drive through electricity splitter described amplification signal and increase Dare at the first Lithium metaniobate Mach
Manipulator LiNb-MZM1 and the second Lithium metaniobate Mach increase on Dare manipulator LiNb-MZM2；Wherein, institute
The bias point stating LiNb-MZM1 and described LiNb-MZM2 is arranged at maximum transmitted point；
After utilizing laser instrument that laser is injected described LiNb-MZM1, utilize light splitter by described
The light carrier of LiNb-MZM1 output is divided into two paths, and wherein, a paths injects described LiNb-MZM2,
Another paths be filtered process after, with through described LiNb-MZM2 modulate after and carry out wavelength-division multiplex
The path coupling of demultiplexing process and base band data modulation treatment, obtains meeting pre-conditioned optical signal；
Utilize photodetector by described meet pre-conditioned optical signal carry out beat frequency with obtain meet default
Two millimeter waves of frequency.
The production method of millimeter wave the most according to claim 1, it is characterised in that described another
Path is filtered process and includes:
Light Rectangular Band-pass Filter is utilized to be filtered another paths processing, to obtain+2 rank light carriers.
The production method of millimeter wave the most according to claim 1, it is characterised in that described through institute
State after LiNb-MZM2 modulates and carry out wavelength-division multiplex demultiplexing process and the road of base band data modulation treatment
The method that footpath is specifically filtered processing includes:
Utilize Wave division multiplexer/demultiplexer filter out described LiNb-MZM2 outfan ± 4 rank light carriers；
Light intensity modulator is utilized to be modulated by base band data on described-4 rank light carriers；
-4 rank light carriers after modulation are coupled with described+4 rank light carriers.
The production method of millimeter wave the most according to claim 1, it is characterised in that described utilize light
Electric explorer meets pre-conditioned optical signal and carries out beat frequency by described and meet the millimeter of predeterminated frequency to obtain
Ripple includes:
Described photo-detector meets pre-conditioned optical signal carry out heterodyne beat process by described, is clapped
The signal of telecommunication after Pin；
The signal of telecommunication after described beat frequency is carried out bandpass filtering treatment by electricity band filter, obtains filtered
Meet two millimeter waves of predeterminated frequency.
The production method of millimeter wave the most according to claim 1, it is characterised in that also include: profit
Electricity consumption Amplitude Demodulators and bit error rate survey meter carry out quality testing to described millimeter wave.
6. the generation system of a millimeter wave, it is characterised in that this system includes:
Signal amplifying apparatus, is used for utilizing electric amplifier by local oscillation signal processing and amplifying, is amplified signal；
Divide merit device, for dividing merit to process rear drive at the first niobium through electricity splitter described amplification signal
Acid lithium Mach increases Dare manipulator LiNb-MZM1 and the second Lithium metaniobate Mach increases Dare manipulator
On LiNb-MZM2；Wherein, the bias point of described LiNb-MZM1 and described LiNb-MZM2 is arranged at
Maximum transmitted point；
Processing means, after being used for utilizing laser instrument that laser is injected described LiNb-MZM1, utilizes light point merit
The light carrier that described LiNb-MZM1 exports is divided into two paths by device, and wherein, a paths injects described
LiNb-MZM2, another paths be filtered process after, with through described LiNb-MZM2 modulate after also
Carry out the path coupling of wavelength-division multiplex demultiplexing process and base band data modulation treatment, obtain meeting default
The optical signal of condition；
Acquisition device, for utilizing photodetector to meet pre-conditioned optical signal carry out beat frequency by described
To obtain two millimeter waves meeting predeterminated frequency.
The generation system of millimeter wave the most according to claim 6, it is characterised in that described process fills
Put and include: light Rectangular Band-pass Filter, for another paths being filtered process, to obtain+2 rank
Light carrier.
The generation system of millimeter wave the most according to claim 6, it is characterised in that described process fills
Put and include:
Wave division multiplexer/demultiplexer, for filter out described LiNb-MZM2 outfan ± 4 rank light carriers；
Light intensity modulator, for modulating described-4 rank light carriers by base band data；
First photo-coupler, for coupling-4 rank light carriers after modulation with described+4 rank light carriers.
The generation system of millimeter wave the most according to claim 6, it is characterised in that described acquisition fills
Put and include:
Described photo-detector, for meeting pre-conditioned optical signal carry out heterodyne beat process by described,
Obtain the signal of telecommunication after beat frequency；
Electricity band filter, for the signal of telecommunication after described beat frequency is carried out bandpass filtering treatment, is filtered
Two millimeter waves meeting predeterminated frequency after ripple.
The generation system of millimeter wave the most according to claim 6, it is characterised in that also include:
Quality detection device, is used for utilizing electricity Amplitude Demodulators and bit error rate survey meter that described millimeter wave is carried out matter
Amount detection.
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| CN106877940A (en) * | 2017-04-24 | 2017-06-20 | 苏州大学 | A kind of optical signal launch end and millimeter wave light carrier radio communication system |
| CN113541809A (en) * | 2021-07-13 | 2021-10-22 | 东南大学 | Multi-band adjustable photo-generated millimeter wave generation system |
| CN113783627A (en) * | 2020-06-09 | 2021-12-10 | 华为技术有限公司 | Signal generation method, device and system |
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| CN103888191A (en) * | 2014-03-19 | 2014-06-25 | 北京邮电大学 | Microwave photon down-conversion method based on bi-directional utilization of phase modulator |
| CN105357159A (en) * | 2015-09-29 | 2016-02-24 | 北京邮电大学 | Method and system for generating ninefold-frequency QPSK optical millimeter-wave signal |
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| CN103888191A (en) * | 2014-03-19 | 2014-06-25 | 北京邮电大学 | Microwave photon down-conversion method based on bi-directional utilization of phase modulator |
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| CN106877940A (en) * | 2017-04-24 | 2017-06-20 | 苏州大学 | A kind of optical signal launch end and millimeter wave light carrier radio communication system |
| CN113783627A (en) * | 2020-06-09 | 2021-12-10 | 华为技术有限公司 | Signal generation method, device and system |
| CN113783627B (en) * | 2020-06-09 | 2022-12-30 | 华为技术有限公司 | Signal generation method, device and system |
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