CN106501971A - Differential driving Mach once moral intensity modulator and method - Google Patents
Differential driving Mach once moral intensity modulator and method Download PDFInfo
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- CN106501971A CN106501971A CN201611184252.XA CN201611184252A CN106501971A CN 106501971 A CN106501971 A CN 106501971A CN 201611184252 A CN201611184252 A CN 201611184252A CN 106501971 A CN106501971 A CN 106501971A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0305—Constructional arrangements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0305—Constructional arrangements
- G02F1/0316—Electrodes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0327—Operation of the cell; Circuit arrangements
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- General Physics & Mathematics (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 differential driving Mach once moral intensity modulator and method, are related to technical field of photo communication.The manipulator includes differential driving manipulator, first differential electric signal driver, second differential electric signal driver, adjustable electric signal attenuator and adjustable electric delay line, differential driving manipulator includes the positive drive electrode of difference and the negative drive electrode of difference, the positive drive electrode of difference and each corresponding modulation arm of the negative drive electrode of difference, first differential electric signal driver is connected with adjustable electric signal attenuator, second differential electric signal driver is connected with adjustable electric delay line, adjustable electric signal attenuator, adjustable electric delay line is connected with differential driving manipulator, the manipulator is used in the case of without the need for DAC chip, realize level Four pulse amplitude modulation.The present invention realizes level Four pulse amplitude modulation in the case of without the need for DAC chip, can reduce the complexity of transmitting terminal, reduces the cost of system optical communication system.
Description
Technical field
The present invention relates to technical field of photo communication, is specifically related to a kind of differential driving Mach once moral intensity modulator and side
Method.
Background technology
With the continuous progressive and development of society, the mankind are increasing to the demand of information, so that modern society
Information data amount assumes the explosive growth of exponential form.The fast development of optical communication network technology is provided for the solution of this difficult problem
Effectively reliable scheme.
With the continuous development of optical communication technology, transmission capacity has reached 100T bit magnitudes, 100G in networking
Main flow is increasingly becoming, or even 400G has also had part to use.In the optical-fiber network of such high speed, in addition to various algorithms,
High-speed electro-optic modulator is also a vital factor.
High-speed electro-optic modulator is the device foundation stone for building high speed optical networks, and it is responsible for the signal of telecommunication of whole optical communication network
Conversion to optical signal.Therefore the performance of manipulator directly determines the optical signal quality transmitted in whole optical communication network.
At present, long away from coherent light communication technology in Large Copacity optical communication system by substantial amounts of employing, but in short span
And using coherent system between the optical interconnection system of data center, system complexity and cost can be caused to be substantially improved.Therefore,
Restricted by cost, the optical interconnection between short-distance and medium-distance optic communication and data center generally uses intensity modulated and direct detection
Technical scheme.Wherein, PAM (Pulse Amplitude Modulation, pulse amplitude modulation) there is EO-1 hyperion to imitate because of which
The advantage of rate, and become a kind of intensity modulated form and be widely adopted.However, for traditional intensity modulator, modulating in PAM
Under form, transmitting terminal needs DAC (Digital-Analog Converter, a digital to analog converter) chip to be loaded into produce
Radiofrequency signal on manipulator, this scheme can increase the cost of transmitting terminal, especially the DAC chip cost of the big bandwidth of high speed
Higher.
Content of the invention
The invention aims to solving in the optical interconnection system of short span and data center, intensity modulator is needed
Want DAC chip to produce the radiofrequency signal being loaded on manipulator, cause the problem that transmitting terminal is relatively costly, there is provided a kind of difference
Mach once moral intensity modulator and method is driven, in the case of without the need for DAC chip, level Four pulse amplitude modulation is realized, can be dropped
The complexity of low transmitting terminal, reduces the cost of system optical communication system.
The present invention provides a kind of differential driving Mach once moral intensity modulator, is applied to the light of short span and data center
In interacted system, the manipulator includes that differential driving manipulator, the first differential electric signal driver, the second differential electric signal drive
Device, adjustable electric signal attenuator and adjustable electric delay line, wherein, differential driving manipulator includes the positive drive electrode of difference and difference
The each corresponding modulation arm of the negative drive electrode of negative drive electrode, the positive drive electrode of difference and difference, the first differential electric signal drive
Device is connected with adjustable electric signal attenuator, and the second differential electric signal driver is connected with adjustable electric delay line, and the adjustable signal of telecommunication declines
Subtract device, adjustable electric delay line to be connected with differential driving manipulator, the manipulator is used in the case of without the need for DAC chip, real
Existing level Four pulse amplitude modulation, forms level Four pulse amplitude modulation PAM4 optical signal.
On the basis of above-mentioned technical proposal, the adjustable electric signal attenuator, adjustable electric delay line and differential driving are adjusted
The positive drive electrode of the difference of device processed or the negative drive electrode connection of difference, concrete connected mode have 4 kinds：
Adjustable electric signal attenuator is connected on the positive drive electrode of difference of differential driving manipulator, and adjustable electric delay line connects
The difference for being connected to differential driving manipulator is born on drive electrode；
Adjustable electric signal attenuator is connected to the difference of differential driving manipulator and bears on drive electrode, and adjustable electric delay line connects
It is connected on the positive drive electrode of difference of differential driving manipulator；
Adjustable electric signal attenuator, adjustable electric delay line are all connected to the positive drive electrode of difference of differential driving manipulator
On；
Adjustable electric signal attenuator, adjustable electric delay line are all connected to the difference of differential driving manipulator and bear drive electrode
On.
On the basis of above-mentioned technical proposal, the pad value of the adjustable electric signal attenuator is between 3dB-9dB.
On the basis of above-mentioned technical proposal, the pad value of the adjustable electric signal attenuator is 6dB.
On the basis of above-mentioned technical proposal, once moral intensity modulator is additionally operable to replace light homophase the differential driving Mach
The intensity modulator on I roads and Q roads in orthogonal I/Q modulator, in the case where DAC chip is not needed, produces 16 quadrature amplitudes and adjusts
Device QAM signals processed.
The present invention also provides one kind, and based on above-mentioned differential driving Mach, once moral intensity modulator realizes that level Four pulse amplitude is adjusted
The method of system, is applied in the optical interconnection system of short span and data center, and the method is comprised the following steps：
S1, the first differential electric signal driver produce the first drive signal, and the second differential electric signal driver is synchronously produced
The voltage peak of the first drive signal is reduced to the one of the second drive signal for second drive signal, adjustable electric signal attenuator
Half, adjustable electric delay line is by the sequential time delay of the second drive signal so that the sequential of the second drive signal and the first drive signal
Rising edge or trailing edge synchronous in time；
S2, optical signals differential driving manipulator input input, the optical signal of input through overdamping after first drive
The second drive signal after dynamic signal and delay is exported after carrying out pulse amplitude modulation, then linear superposition respectively, forms PAM4 light
Signal.
On the basis of above-mentioned technical proposal, the adjustable electric signal attenuator, adjustable electric delay line and differential driving are adjusted
The positive drive electrode of the difference of device processed or the negative drive electrode connection of difference, concrete connected mode have 4 kinds：
Adjustable electric signal attenuator is connected on the positive drive electrode of difference of differential driving manipulator, and adjustable electric delay line connects
The difference for being connected to differential driving manipulator is born on drive electrode；
Adjustable electric signal attenuator is connected to the difference of differential driving manipulator and bears on drive electrode, and adjustable electric delay line connects
It is connected on the positive drive electrode of difference of differential driving manipulator；
Adjustable electric signal attenuator, adjustable electric delay line are all connected to the positive drive electrode of difference of differential driving manipulator
On；
Adjustable electric signal attenuator, adjustable electric delay line are all connected to the difference of differential driving manipulator and bear drive electrode
On.
On the basis of above-mentioned technical proposal, the pad value of the adjustable electric signal attenuator is between 3dB-9dB.
On the basis of above-mentioned technical proposal, the pad value of the adjustable electric signal attenuator is 6dB.
The present invention also provides a kind of based on above-mentioned differential driving Mach 16 quadrature amplitude modulations of once moral intensity modulator generation
The method of device signal, is applied in the optical interconnection system of short span and data center, and the method is comprised the following steps：Using institute
The intensity modulator on the I roads and Q roads in differential driving Mach once moral intensity modulator replacement light inphase quadrature I/Q modulator is stated,
In the case of not needing DAC chip, 16 quadrature amplitude modulator QAM signals are produced.
Compared with prior art, advantages of the present invention is as follows：
(1) two modulator electrodes of the present invention using differential driving manipulator：The positive drive electrode of difference and the negative driving of difference
Electrode, is driven by the different signal of amplitude, and the voltage peak ratio for applying to drive is 2：1, while directly using two-way
Differential signal can significantly improve efficiency, it is to avoid using DAC chip, in the situation without the need for DAC chip producing PAM4 signals
Under, level Four pulse amplitude modulation is realized, (Pulse Amplitude Modulation 4, level Four pulse amplitude are adjusted to form PAM4
System) optical signal.The present invention is improved to existing intensity modulator, is produced PAM signals using a kind of simple scheme, is not required to
Modification is made to existing drive circuit, so as to reduce the complexity of transmitting terminal, to reduce the cost of system optical communication system.
(2) present invention efficiently utilizes two signal electrodes of differential driving manipulator, not only avoid waste, also carries
High work efficiency, and the straight straightening check system and the optical interconnection system of data center suitable for short distance optical transport.
(3) once moral intensity modulator can be also used for replacing the I in light I/Q modulator the differential driving Mach in the present invention
Road and the intensity modulator on Q roads, so, in the case where DAC chip is not needed, it is easy to realize the generation of 16QAM signals in ground.
Description of the drawings
Fig. 1 is the structural representation of differential driving Mach once moral intensity modulator in the embodiment of the present invention.
When Fig. 2 is that only the positive drive electrode of difference is in running order in the embodiment of the present invention, on the positive drive electrode of difference
The time sequential pulse sequence diagram of loading.
When Fig. 3 is that only the positive drive electrode of difference is in running order in the embodiment of the present invention, the eye pattern of optical signal is exported.
When Fig. 4 is that only the negative drive electrode of difference is in running order in the embodiment of the present invention, on the negative drive electrode of difference
The time sequential pulse sequence diagram of loading.
When Fig. 5 is that only the negative drive electrode of difference is in running order in the embodiment of the present invention, the eye pattern of optical signal is exported.
When Fig. 6 is that the positive drive electrode of difference and the negative drive electrode of difference are at working condition in the embodiment of the present invention, poor
The signal for dividing the time sequential pulse sequence of the two-way modulation signal loaded on positive drive electrode and the negative drive electrode of difference not to be aligned
Figure.
When Fig. 7 is that the positive drive electrode of difference and the negative drive electrode of difference are at working condition in the embodiment of the present invention, poor
The time sequential pulse sequence distribution signal for dividing the two-way modulation signal loaded on positive drive electrode and the negative drive electrode of difference synchronous
Figure.
Fig. 8 is the PAM4 optical signals of the positive drive electrode of difference and the negative drive electrode synthesis output of difference in the embodiment of the present invention
PAM4 signal of telecommunication sequential amplitude distribution schematic diagrams.
Fig. 9 is the PAM4 optical signals of the positive drive electrode of difference and the negative drive electrode synthesis output of difference in the embodiment of the present invention
Eye pattern.
Reference：1- differential driving manipulators, the positive drive electrode of 1a- difference, 1b- difference bear drive electrode, 2- first
Differential electric signal driver, 3- the second differential electric signal drivers, 4- adjustable electric signal attenuators, electric delay line that 5- is adjustable.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Shown in Figure 1, the embodiment of the present invention provides a kind of differential driving Mach once moral intensity modulator, be applied to short across
Away from and the optical interconnection system of data center in, the manipulator includes differential driving manipulator 1, the first differential electric signal driver
2nd, the second differential electric signal driver 3, adjustable electric signal attenuator 4 and adjustable electric delay line 5, wherein, differential driving manipulator 1
Drive electrode 1b is born including the positive drive electrode 1a of difference and the negative drive electrode 1b of difference, the positive drive electrode 1a of difference and difference each right
A modulation arm, the first differential electric signal driver 2 is answered to be connected with adjustable electric signal attenuator 4, the second differential electric signal drives
Device 3 is connected with adjustable electric delay line 5, and adjustable electric signal attenuator 4, adjustable electric delay line 5 are connected with differential driving manipulator 1
Connect, the manipulator is used for, in the case of without the need for DAC chip, realizing level Four pulse amplitude modulation, forms PAM4 (Pulse
Amplitude Modulation 4, level Four pulse amplitude modulation) optical signal.
Once moral intensity modulator can be also used for replacing light IQ (In-phase differential driving Mach in the present invention
Quadrature, inphase quadrature) I roads in manipulator and Q roads intensity modulator, so, in the situation for not needing DAC chip
Under, it is easy to ground produces 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulator) signal.
The embodiment of the present invention also provides one kind, and based on differential driving Mach, once level Four pulse amplitude realized by moral intensity modulator
The method of modulation, is applied in the optical interconnection system of short span and data center, and the method is comprised the following steps：
S1, the first differential electric signal driver 2 produce the first drive signal, and the second differential electric signal driver 3 is synchronous to produce
The voltage peak of the first drive signal is reduced to the second drive signal by raw second drive signal, adjustable electric signal attenuator 4
Half, adjustable electric delay line 5 is by the sequential time delay of the second drive signal so that the sequential of the second drive signal drives letter with first
Number rising edge or trailing edge synchronous in time；
S2, optical signals differential driving manipulator 1 input input, the optical signal of input through overdamping after first drive
The second drive signal after dynamic signal and delay is exported after carrying out pulse amplitude modulation, then linear superposition respectively, forms PAM4 light
Signal.
For example：The first drive signal being carried on the positive drive electrode 1a of difference of differential driving manipulator 1 is
01011010, the second drive signal being carried on the negative drive electrode 1b of difference of differential driving manipulator 1 is 20020020, by
The PAM4 optical signals of the output of differential driving manipulator 1 are 21031030.
The pad value of adjustable electric signal attenuator 4 typically between 3dB-9dB, particularly pad value be 6dB when, more
It is close to the optimum Working of manipulator in the embodiment of the present invention.
Adjustable electric signal attenuator 4, adjustable electric delay line 5 drive electrode 1a positive with the difference of differential driving manipulator 1 or
The negative drive electrode 1b connections of difference, concrete connected mode have 4 kinds：
(1) adjustable electric signal attenuator 4 is connected on the positive drive electrode 1a of difference of differential driving manipulator 1, adjustable electric
Delay line 5 is connected to the difference of differential driving manipulator 1 and bears on drive electrode 1b；
(2) adjustable electric signal attenuator 4 is connected on the negative drive electrode 1b of difference of differential driving manipulator 1, adjustable electric
Delay line 5 is connected on the positive drive electrode 1a of difference of differential driving manipulator 1；
(3) adjustable electric signal attenuator 4, adjustable electric delay line 5 are all connected to the difference of differential driving manipulator 1 and just drive
On electrode 1a；
(4) adjustable electric signal attenuator 4, adjustable electric delay line 5 are all connected to the difference of differential driving manipulator 1 and negative drive
On electrode 1b.
Below the operation principle of the present invention is described in detail.
When the positive drive electrode 1a of the difference of only differential driving manipulator 1 is in running order, the first drive signal is passed through
After adjustable electric signal attenuator 4, the time sequential pulse sequence being loaded on the positive drive electrode 1a of difference of differential driving manipulator 1 is shown
Intention is shown in Figure 2, and the output light signal eye diagram under corresponding working state is shown in Figure 3.As the first drive signal is passed through
Adjustable electric signal attenuator 4 is crossed so that voltage peak have dropped half for 0.5Vpp, while showing on the eye pattern of its optical signal
Extinction ratio also reduced about half.
When the negative drive electrode 1b of the difference of only differential driving manipulator 1 is in running order, the second drive signal is passed through
After adjustable electric delay line 5, the difference for being loaded into differential driving manipulator 1 bears the time sequential pulse sequence diagram on drive electrode 1b
Shown in Figure 4, the output light signal eye diagram under corresponding working state is shown in Figure 5, now, the voltage of the second drive signal
Peak value is Vpp.
The embodiment of the present invention is simultaneously in the positive drive electrode 1a and negative drive electrode 1b of difference of difference of differential driving manipulator 1
The different modulation signal of upper loading amplitude：First drive signal and the second drive signal, load on the positive drive electrode 1a of difference
Voltage be on-load voltage on the negative drive electrode 1b of difference half；And the modulation signal loaded on the positive drive electrode 1a of difference
The sequential of (the second drive signal), the rising of the modulation signal (the first drive signal) loaded on drive electrode 1b negative with difference
Edge or trailing edge are synchronous in time；Due to differential driving Mach provided in an embodiment of the present invention, once moral intensity modulator is one
Individual linear system, the linear superposition of responsive state when the Whole Response of optical signal works independently equivalent to two differential electrodes.
In embodiments of the present invention, the voltage for loading on the positive drive electrode 1a of the difference of differential driving manipulator 1 is difference
The half of on-load voltage on negative drive electrode 1b, is entered by the adjustable electric signal attenuator 4 on drive electrode 1a positive to difference
Row fine setting is realized so that the signal response on the positive drive electrode 1a of difference is the signal response on the negative drive electrode 1b of difference
Half.
Generally, when the positive drive electrode 1a of the difference of differential driving manipulator 1 and the negative drive electrode 1b of difference locate
When in working order, the when serial vein of the two-way modulation signal loaded on the negative drive electrode 1b of the positive drive electrode 1a of difference, difference
Rush sequence to be not aligned with, referring to as shown in fig. 6, therefore, what the embodiment of the present invention needed drive electrode 1b negative to difference can
Electric delay line 5 is adjusted to be adjusted, until being adjusted to the two-way modulation electricity of the positive drive electrode 1a of difference and the negative drive electrode 1b of difference
Till the rising edge or trailing edge synchronization in time of signal.
The two-way modulation electricity loaded on the positive drive electrode 1a of the difference of the differential driving manipulator 1 and negative drive electrode 1b of difference
The synchronous time sequential pulse sequence distribution of signal is shown in Figure 7, because both clocks are the same, as long as there is an arteries and veins
Punching alignment, other just all aligns.
The positive drive electrode 1a of the difference of differential driving manipulator 1 and the negative drive electrode 1b synthesis output PAM4 light letters of difference
Number, the PAM4 signal of telecommunication sequential amplitude distribution obtained through photodetector is shown in Figure 8, corresponding PAM4 optical signals eye pattern
Shown in Figure 9.
A large amount of commercial differential driving intensity modulators typically drive electricity using the positive drive electrode of difference and difference are negative now
Enter line amplitude driving in pole etc..Two modulator electrodes of the embodiment of the present invention using differential driving manipulator：The positive drive electrode of difference
With the negative drive electrode of difference, efficiency can be significantly improved, and simply produces PAM4 signals.
Once moral intensity modulator, when intensity modulated is applied to, can avoid making differential driving Mach in the embodiment of the present invention
PAM4 signals are produced with DAC chip, and the light of the straight straightening check system suitable for short distance optical transport and data center is mutual
Contact system.
In addition, using differential driving Mach provided in an embodiment of the present invention, once light IQ modulation replaced respectively by moral intensity modulator
The intensity modulator on I roads and Q roads in device, can be in the case where DAC chip not be needed, it is easy to realize 16QAM signals in ground
Generation.
Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if these modifications and change
Within the scope of the claims in the present invention and its equivalent technologies, then these modifications and modification are also in protection scope of the present invention for type
Within.
The prior art that the content not described in detail in description is known to the skilled person.
Claims (10)
1. a kind of differential driving Mach once moral intensity modulator, is applied in the optical interconnection system of short span and data center,
It is characterized in that：The manipulator includes differential driving manipulator (1), the first differential electric signal driver (2), the second difference telecommunications
Number driver (3), adjustable electric signal attenuator (4) and adjustable electric delay line (5), wherein, it is poor that differential driving manipulator (1) includes
Divide positive drive electrode (1a) and the negative drive electrode (1b) of difference, the positive drive electrode of difference (1a) and the negative drive electrode (1b) of difference are each
A corresponding modulation arm, the first differential electric signal driver (2) are connected with adjustable electric signal attenuator (4), the second difference telecommunications
Number driver (3) is connected with adjustable electric delay line (5), and adjustable electric signal attenuator (4), adjustable electric delay line (5) are and difference
Manipulator (1) connection, the manipulator is driven to be used for, in the case of without the need for DAC chip, realizing level Four pulse amplitude modulation, formed
Level Four pulse amplitude modulation PAM4 optical signal.
2. differential driving Mach as claimed in claim 1 once moral intensity modulator, it is characterised in that：The adjustable signal of telecommunication declines
Subtract device (4), adjustable electric delay line (5) with the negative driving electricity of the difference positive drive electrode (1a) or difference of differential driving manipulator (1)
Pole (1b) connects, and concrete connected mode has 4 kinds：
Adjustable electric signal attenuator (4) is connected in the difference positive drive electrode (1a) of differential driving manipulator (1), and adjustable electric is prolonged
Slow line (5) is connected to the difference of differential driving manipulator (1) and bears on drive electrode (1b)；
Adjustable electric signal attenuator (4) is connected to the difference of differential driving manipulator (1) and bears on drive electrode (1b), and adjustable electric is prolonged
Line (5) is connected in the difference positive drive electrode (1a) of differential driving manipulator (1) late；
Adjustable electric signal attenuator (4), adjustable electric delay line (5) are all connected to the difference of differential driving manipulator (1) and just drive
On electrode (1a)；
Adjustable electric signal attenuator (4), adjustable electric delay line (5) are all connected to the difference of differential driving manipulator (1) and bear driving
On electrode (1b).
3. differential driving Mach as claimed in claim 1 once moral intensity modulator, it is characterised in that：The adjustable signal of telecommunication declines
Subtract the pad value of device (4) between 3dB-9dB.
4. differential driving Mach as claimed in claim 3 once moral intensity modulator, it is characterised in that：The adjustable signal of telecommunication declines
The pad value for subtracting device (4) is 6dB.
5. differential driving Mach as claimed in claim 1 once moral intensity modulator, it is characterised in that：The differential driving Mach
Once moral intensity modulator was additionally operable to the intensity modulator for replacing I roads and Q roads in light inphase quadrature I/Q modulator, was not needing
In the case of DAC chip, 16 quadrature amplitude modulator QAM signals are produced.
It is 6. a kind of that based on differential driving Mach described in claim 1, once the side of level Four pulse amplitude modulation realized by moral intensity modulator
Method, it is characterised in that：It is applied in the optical interconnection system of short span and data center, the method is comprised the following steps：
S1, the first differential electric signal driver (2) produce the first drive signal, and the second differential electric signal driver (3) is synchronously produced
The voltage peak of the first drive signal is reduced to the second drive signal by raw second drive signal, adjustable electric signal attenuator (4)
Half, adjustable electric delay line (5) are by the sequential time delay of the second drive signal so that the sequential of the second drive signal is driven with first
The rising edge or trailing edge of dynamic signal is synchronous in time；
S2, optical signals differential driving manipulator (1) input input, the optical signal of input through overdamping after first driving
The second drive signal after signal and delay is exported after carrying out pulse amplitude modulation, then linear superposition respectively, forms PAM4 light letter
Number.
7. the method for realizing level Four pulse amplitude modulation as claimed in claim 6, it is characterised in that：The adjustable signal of telecommunication declines
Subtract device (4), adjustable electric delay line (5) with the negative driving electricity of the difference positive drive electrode (1a) or difference of differential driving manipulator (1)
Pole (1b) connects, and concrete connected mode has 4 kinds：
Adjustable electric signal attenuator (4) is connected in the difference positive drive electrode (1a) of differential driving manipulator (1), and adjustable electric is prolonged
Slow line (5) is connected to the difference of differential driving manipulator (1) and bears on drive electrode (1b)；
Adjustable electric signal attenuator (4) is connected to the difference of differential driving manipulator (1) and bears on drive electrode (1b), and adjustable electric is prolonged
Line (5) is connected in the difference positive drive electrode (1a) of differential driving manipulator (1) late；
Adjustable electric signal attenuator (4), adjustable electric delay line (5) are all connected to the difference of differential driving manipulator (1) and just drive
On electrode (1a)；
Adjustable electric signal attenuator (4), adjustable electric delay line (5) are all connected to the difference of differential driving manipulator (1) and bear driving
On electrode (1b).
8. the method for realizing level Four pulse amplitude modulation as claimed in claim 6, it is characterised in that：The adjustable signal of telecommunication declines
Subtract the pad value of device (4) between 3dB-9dB.
9. the method for realizing level Four pulse amplitude modulation as claimed in claim 8, it is characterised in that：The adjustable signal of telecommunication declines
The pad value for subtracting device (4) is 6dB.
It is 10. a kind of that based on differential driving Mach described in claim 1, once moral intensity modulator produces 16 quadrature amplitude modulators letter
Number method, it is characterised in that：It is applied in the optical interconnection system of short span and data center, the method includes following step
Suddenly：Intensity using I roads and Q roads in the differential driving Mach once moral intensity modulator replacement light inphase quadrature I/Q modulator
Manipulator, in the case where DAC chip is not needed, produces 16 quadrature amplitude modulator QAM signals.
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| CN107612527A (en) * | 2017-07-14 | 2018-01-19 | 成都华微电子科技有限公司 | Differential clocks drive circuit |
| CN108616310A (en) * | 2018-04-27 | 2018-10-02 | 中国科学院半导体研究所 | Increase the method that Dare modulator carries out level Four pulse amplitude modulation based on Mach |
| CN111211841A (en) * | 2019-12-20 | 2020-05-29 | 中国科学院微电子研究所 | Double-arm driving four-stage pulse amplitude modulator and modulation method thereof |
| CN112600623A (en) * | 2020-12-09 | 2021-04-02 | 武汉光谷信息光电子创新中心有限公司 | Differential drive modulator and control method thereof |
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| CN111211841B (en) * | 2019-12-20 | 2021-04-06 | 中国科学院微电子研究所 | Double-arm driving four-stage pulse amplitude modulator and modulation method thereof |
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