CN110190904A - The method and device of light tune top signal is realized in WDM PON system - Google Patents
The method and device of light tune top signal is realized in WDM PON system Download PDFInfo
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- CN110190904A CN110190904A CN201910412500.9A CN201910412500A CN110190904A CN 110190904 A CN110190904 A CN 110190904A CN 201910412500 A CN201910412500 A CN 201910412500A CN 110190904 A CN110190904 A CN 110190904A
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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
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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
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
Abstract
The invention discloses the method and devices that light tune top signal is realized in a kind of WDM PON system, are related to optical communication field.Method includes the following steps: carrying out coded modulation to low speed management data, low speed management coding modulation data is obtained；Low speed management coding modulation data is coupled with current signal, generates low speed intensity-modulated current signal；Image intensifer with low-rate modulation characteristic generates light tune top signal, and amplify high speed business data optical signal in the intensity modulated to high speed luminance flux of low speed intensity-modulated current signal using the Strength Changes of modulation electric current.The present invention, which is able to achieve, manages low speed in signal modulation to high speed luminance flux.
Description
Technical field
The present invention relates to optical communication field, a kind of be specifically related to realize light tune top signal in WDM PON system method
And device.
Background technique
With the development of the 5G communication technology, big bandwidth, low delay etc. become the heavy index parameter of 5G communication, virtual point-to-point
WDM PON (Wavelength Division Multiplexing PON, wavelength division multiplexing type passive optical network) system of connection,
Have in terms of bandwidth and delay and compare unique advantage, by the solution important as 5G forward pass part.
The scale of WDM PON technology is commercial, and key technology is colorless ONU (Optical Network Unit, optical-fiber network
Unit) realization, colorless ONU needs to solve the functions such as adjustable, channel monitoring and the real-time management of wavelength.Laser can incite somebody to action
The high speed business datagram number of 25G is converted into high speed business data optical signal, since the rate of electric signal is very high, does not have here
Have low speed management data and high-speed signal coupling to being sent together by laser, in order to avoid the electricity of influence high speed signal
Domain.Therefore, it is necessary to use light tune top (Optical Top Adjustment) technology, by the management signal modulation of low speed to high speed
On optical channel, could wavelength, connection status, signal quality more easily to each channel monitored in real time, be more convenient for each
Channel manages and adjusts in real time.
In the implementation of the present invention, at least there are the following problems in the prior art for inventor's discovery:
The high speed business datagram number of 25G and low speed electrical domain signal direct-coupling, can exist high speed signal integrality compared with
Be difficult to resolve certainly, technical solution is complicated, needs the problem of high speed fabric swatch many aspects, so as to cause the development cycle is long, production test is numerous
It is trivial, finished product rate is low, therefore the direct-coupled cost of electrical domain is very high.How with low cost practical method light tune top is realized
Technology will in the management signal modulation to high speed luminance flux of low speed, be this field important technological problems urgently to be resolved.
Summary of the invention
The purpose of the invention is to overcome the shortcomings of above-mentioned background technique, provides in a kind of WDM PON system and realize light
The method and device for adjusting top signal can be realized and manage low speed in signal modulation to high speed luminance flux.
In a first aspect, providing a kind of method for realizing light tune top signal in WDM PON system, comprising the following steps:
Coded modulation is carried out to low speed management data, obtains low speed management coding modulation data；
Low speed management coding modulation data is coupled with current signal, generates low speed intensity-modulated current signal；
Image intensifer with low-rate modulation characteristic is believed low speed intensity-modulated current using the Strength Changes of modulation electric current
Number intensity modulated to high speed luminance flux on, generate light tune top signal, and amplify light tune top signal and high speed business data light letter
Number.
It is further comprising the steps of according in a first aspect, in the first possible implementation of the first aspect:
In the transmitting terminal of ONU, high speed business datagram number and threshold current give laser and high-speed assembly, threshold respectively
It is worth operating current needed for electric current provides laser, high speed business datagram number is converted to high speed business data light by laser
Signal.
It is described that there is low-rate modulation characteristic according in a first aspect, in the second possible implementation of the first aspect
Image intensifer be SOA or EDFA.
It is described that there is low-rate modulation characteristic according in a first aspect, in a third possible implementation of the first aspect
Image intensifer integrated with laser and high-speed assembly, or separation it is external.
Second aspect provides the device that light tune top signal is realized in a kind of WDM PON system, comprising:
Administrative unit is controlled, is used for: output low speed management data and current signal；
Modulation unit is used for: being carried out coded modulation to low speed management data, is obtained low speed management coding modulation data；
Coupling circuit are used for: low speed management coding modulation data being coupled with current signal, generates low speed intensity modulated electricity
Flow signal；
Image intensifer with low-rate modulation characteristic, is used for: using the Strength Changes of modulation electric current, by low speed intensity modulated
The strength characteristics of current signal is modulated on high speed luminance flux, generates light tune top signal, and amplify high speed business data optical signal；
Laser and high-speed assembly: for high speed business datagram number to be converted into high speed business data optical signal.
According to second aspect, in the first possible implementation of the second aspect, the control administrative unit passes through
Low speed data interface sends low speed and manages data to modulation unit, controls administrative unit and also exports electric current letter by DAC converter
Number to coupling circuit.
It is in a second possible implementation of the second aspect, described that there is low-rate modulation characteristic according to second aspect
Image intensifer be SOA or EDFA.
It is in the third possible implementation of the second aspect, described that there is low-rate modulation characteristic according to second aspect
Image intensifer integrated with laser and high-speed assembly, or separation it is external.
According to second aspect, in the fourth possible implementation of the second aspect, the modulation unit is specifically used for:
In transmitting terminal, low speed management data are encoded, then digital signal is converted to analog signal, is drawn by the output of modulation unit
Foot exports analog signal to coupling circuit.
According to second aspect, in a fifth possible implementation of the second aspect, the coupling circuit include first
Capacitor C1, first resistor R1, second resistance R2,3rd resistor R3, triode T1, the 4th resistance R4, the second capacitor C2, the first electricity
Hold C1 one end be connected with the output of modulation unit, the other end be separately connected one end of first resistor R1, second resistance R2 one
It holds, one end of 3rd resistor R3, another termination power of first resistor R1, the other end ground connection of second resistance R2,3rd resistor
The other end of R3 is connected with the base stage of triode T1, and the emitter ground connection of triode T1, the collector of triode T1 passes through the 4th
Resistance R4 connection current source, the collector of triode T1 are also connected with the second capacitor C2.
Compared with prior art, advantages of the present invention is as follows:
(1) image intensifer with low-rate modulation characteristic is using the Strength Changes for modulating electric current, by low speed intensity modulated electricity
The strength characteristics of stream signal is modulated on high speed luminance flux, generates light tune top signal, and amplify light tune top signal and high speed business
Data optical signal.The image intensifer with low-rate modulation characteristic is SOA (Semiconductor Optical
Amplifier, semiconductor amplifier) or EDFA (Erbium-Doped Optical Fiber Amplifier, Er-doped fiber are put
Big device), SOA or EDFA have the function of re-modulation while amplification, can modulate upstream data, can be realized low speed pipe
It manages in signal modulation to high speed luminance flux, while optical power can also be amplified, effectively extend transmission distance, overcome low speed
High speed signal integrality caused by signal and high speed signal are directly coupled in electrical domain be relatively difficult to resolve certainly, technical solution it is complicated, need height
The problems such as fast cloth version.
(2) SOA or EDFA can increase the quantity of access ONU user to wavelength without selectivity.
(3) re-modulation is carried out on SOA or EDFA, only increases a small amount of electrical part, cost can be effectively reduced.
(4) image intensifer with low-rate modulation characteristic, which can be, integrates with laser and high-speed assembly, can also
To be that separation is external, cost can be optimized with flexible configuration.
Detailed description of the invention
Fig. 1 is the architecture diagram of WDM PON system；
Fig. 2 is the flow chart that the method for light tune top signal is realized in WDM PON system of the embodiment of the present invention；
Fig. 3 is the structural block diagram for realizing the device of light tune top signal in the embodiment of the present invention in WDM PON system；
Fig. 4 is the schematic diagram that modulated current signal generates in the embodiment of the present invention；
Fig. 5 is the functional block diagram of low speed management data modulation in the embodiment of the present invention；
Fig. 6 is the functional block diagram of coupling circuit in the embodiment of the present invention.
Specific embodiment
It reference will now be made in detail to specific embodiments of the present invention now, instantiate example of the invention in the accompanying drawings.Although will knot
The specific embodiment description present invention is closed, it will be understood that, it is not intended to limit the invention to the embodiment described.On the contrary, it is desirable to cover
Cover the change for including within the spirit and scope of the present invention, modification and the equivalent being defined by the following claims.It should be noted that this
In the method and step that describes can realize that and any functional block or function arrangement can quilts by any functional block or function arrangement
It is embodied as the combination of physical entity or logic entity or the two.
In order to make those skilled in the art more fully understand the present invention, with reference to the accompanying drawings and detailed description to this hair
It is bright to be described in further detail.
Note: the example next to be introduced is only a specific example, and not as limiting embodiments of the invention
It is necessary for following specific step, numerical value, condition, data, sequence etc..Those skilled in the art can be by reading this explanation
Book constructs the more embodiments that do not mention in this specification to use design of the invention.
Fig. 1 is WDM PON system architecture diagram.Shown in Figure 1, WDM PON system includes optical line terminal OLT
(Optical Line Termination), optical network unit ONU (Opitcal Network Unit) and optical distribution network ODN
Three parts (Optical Distribution Network), OLT include LD (Laser Diode, semiconductor laser), PD
(Photo Diode, photodiode), AWG (Arrayed Waveguide Grating, array waveguide grating), ODN refers to
Between OLT and ONU, the optical-fiber network by Wavelength Assignment from OLT to ONU or from ONU to OLT is realized.ODN is mainly wrapped
AAWG (Athermal Arrayed Waveguide Grating, hot insensitive array wave-guide grating) is included, AAWG is wavelength
Sensitive Passive Optical Components completes optical wavelength multiplexing, demultiplexing function.WDM PON is realized a little based on the mode of wavelength-division multiplex to more
The connection of point, the mark using wavelength as user terminal ONU, each user are effectively increased by wavelength difference unshared bandwidth
User bandwidth.
In WDM PON, colorless ONU is system core, and the realization of colorless ONU technology needs ONU sidelight module wavelength can
Tune is controllable, ONU convenient for management, and manages signal and be easy to be transmitted in optical path.
Shown in Figure 2, the embodiment of the present invention provides a kind of method that light tune top signal is realized in WDM PON system, packet
Include following steps:
S1, coded modulation is carried out to low speed management data, obtains low speed management coding modulation data；
S2, low speed management coding modulation data is coupled with current signal, generates low speed intensity-modulated current signal；
S3, the image intensifer with low-rate modulation characteristic are using the Strength Changes for modulating electric current, by low speed intensity modulated electricity
In the intensity modulated to high speed luminance flux for flowing signal, light tune top signal is generated, and amplify light tune top signal and high speed business data
Optical signal.
As preferred embodiment, the above method is further comprising the steps of:
In the transmitting terminal of ONU, high speed business datagram number enters laser and high-speed assembly after coupling with threshold current,
Operating current needed for threshold current provides laser, high speed business datagram number are converted to high speed business data by laser
Optical signal.
As preferred embodiment, the above method is further comprising the steps of:
Image intensifer with low-rate modulation characteristic is SOA or EDFA.
SOA or EDFA has the performance of amplification and re-modulation, management data can be modulated to optical channel up, put simultaneously
Greatly, it is conducive to transmission.
In high speed WDM PON system, SOA (semiconductor amplifier) or EDFA (erbium-doped fiber amplifier) etc. are often utilized
Optical signal is amplified, the embodiment of the present invention is on the basis of SOA or EDFA device, using the modulating characteristic of SOA or EDFA,
The management data of low speed are modulated to high speed luminance flux up, the light tune top signal of low speed management data is obtained, then utilizes SOA
Or the enlarging function of EDFA, amplify light tune top signal and high speed business data optical signal, can effectively extend transmission distance, transmits
Opposite end OLT device is given, realizes monitoring and management to high speed luminance flux.
Image intensifer with low-rate modulation characteristic, which can be, to be integrated with laser and high-speed assembly, is also possible to
Separate it is external, can with flexible configuration, optimize cost.
Shown in Figure 3, the embodiment of the present invention also provides the device that light tune top signal is realized in a kind of WDM PON system,
Include:
Control administrative unit, be used for: output low speed management data and current signal realize control and management function；
Modulation unit is used for: being carried out coded modulation to low speed management data, is obtained low speed management coding modulation data；
Coupling circuit are used for: low speed management coding modulation data being coupled with current signal, generates low speed intensity modulated electricity
Flow signal；
Laser and high-speed assembly: for high speed business datagram number to be converted into high speed business data optical signal；
Image intensifer with low-rate modulation characteristic, is used for: using the Strength Changes of modulation electric current, by low speed intensity modulated
In the intensity modulated to high speed luminance flux of current signal, light tune top signal is generated, and amplify light tune top signal and high speed business number
According to optical signal.
As preferred embodiment, the control administrative unit sends low speed by low speed data interface and manages data extremely
Modulation unit, additionally by DAC converter output current signal to coupling circuit.
As preferred embodiment, the image intensifer with low-rate modulation characteristic is SOA or EDFA.
SOA or EDFA can directly amplify optical signal in area of light, it is no longer necessary to turn by traditional optical-electrical-optical
It changes, this not only solves limitation of the optical signal loss to transmission range, also reduces the cost of system equipment.
SOA or EDFA belongs to galvanic device, has the characteristic of modulation, can be adjusted by the Strength Changes of electric current
System.
As preferred embodiment, the image intensifer with low-rate modulation characteristic be can be and laser and high-speed assembly
Integrate, be also possible to separate it is external, can with flexible configuration, optimize cost.
SOA or EDFA in the embodiment of the present invention are used to realize the amplification to optical signal, while low speed is managed data tune
It makes to going on high speed luminance flux.
As preferred embodiment, the modulation unit is specifically used for: in transmitting terminal, compiling to low speed management data
Code converts digital signals into analog signal then by sending module, exports analog signal by the output pin of modulation unit
To coupling circuit.
Shown in Figure 3, in the transmitting terminal of ONU, high speed business datagram number is coupled with threshold current, gives laser
And high-speed assembly, operating current needed for threshold current provides laser, high speed business datagram number are converted by laser
For optical signal, in the process, control administrative unit can be regulated and controled and be managed to the emission wavelength of laser and high-speed assembly.
Since the device and emission wavelength for realizing light tune top signal in WDM PON system are without direct relation, the embodiment of the present invention can
With the scene of scene and fixed wave length for Wavelength tunable.
The light that laser and high-speed assembly issue, power is smaller, and in the process of optic path below to OLT
In, there is also wavelength-division multiplex/Deplexing apparatus Insertion Loss, so, it in order to compensate for Insertion Loss, extends transmission distance, laser is sent out
Optical signal out, amplifies by SOA or EDFA.
A high performance control administrative unit is integrated in this system, control administrative unit can be MCU, DSP, FPGA
Deng, Fig. 4, Fig. 5 be control administrative unit be MCU when an example.Control administrative unit can export more accurate electric current letter
Number, while giving low speed management data to modulation unit, it generates low speed and manages coding modulation data, then, low speed management coding
Modulation data is coupled with current signal generates modulated current signal, gives SOA or EDFA, generates band after SOA or EDFA modulation
The light tune top signal of encoding characteristics transmits after amplifying together with high speed business data optical signal.
Fig. 4 is the modulated process that low speed manages datagram number, and control administrative unit exports two kinds of signals, and one is pass through
Low speed data interface sends management data-signal, and another kind is that accurate current signal is exported by DAC converter.Low speed management
Data generate low speed and manage coding modulation data by modulation unit, coding, are then generated with current signal by coupling circuit
Modulated current signal, modulated current signal have the characteristic of intensity, the coding frequency of intensity and low speed management coding modulation data
Unanimously, it therefore can will be gone on the optical channel of the modulates information of coding to SOA or EDFA.
Fig. 5 is the functional block diagram that low speed manages data modulation, and modulation unit is small in size, and integrated level is high, and it is small-sized to meet module
The requirement of change.Modulation unit includes modulation and demodulation part, has the function of Buffer output and to input signal shaping filter.It is low
Speed management data are the digital signal for controlling administrative unit and being generated by low speed data interface, give modulation unit, modulation unit
Management data are encoded, then by sending module, analog signal are converted digital signals into, by the output of modulation unit
Pin output, then gives the analog signal of output to coupling circuit.Meanwhile the pipe that will be received in receiving end, modulation unit
Information is managed by filter shape, decoding, then gives management data to control administrative unit by low speed data interface.
Fig. 6 is the functional block diagram of coupling circuit.
As preferred embodiment, coupling circuit include first capacitor C1, first resistor R1, second resistance R2, third
Resistance R3, triode T1, the 4th resistance R4, the second capacitor C2, one end of first capacitor C1 are connected with the output of modulation unit, separately
One end be separately connected one end of first resistor R1, one end of second resistance R2,3rd resistor R3 one end, first resistor R1's is another
One termination power, the other end ground connection of second resistance R2, the other end of 3rd resistor R3 are connected with the base stage of triode T1, three poles
The emitter of pipe T1 is grounded, and the collector of triode T1 is by the 4th resistance R4 connection current source, and the collector of triode T1 is also
It is connected with the second capacitor C2.
Shown in Figure 6, C1 has the function of separated by direct communication, and the signal with frequency characteristic after coding can be allowed to pass through,
And isolated DC signal avoids DC level signal from influencing the output of modulation unit.
R1 and R2 is direct current biasing resistance, according to the size of the switch level of triode T1, encodes and adjusts in conjunction with low speed management
The amplitude size of signal processed, the value of required direct current biasing is arranged.
R3 is current-limiting resistance, and R4 is biasing resistor, and current source can have voltage drop at the both ends R4, this voltage after R4
Drop can provide bias voltage to the collector of triode T1.
Current source is the DC current signal for controlling administrative unit output.
C2 is capacitance, by the on and off of triode T1, DC current signal is modulated to have and triode T1
The consistent ac current signal of intensity, by after C2 i.e. generate current modulated, be then passed to SOA or EDFA device.
Based on the same inventive concept, it the embodiment of the present application also provides a kind of computer readable storage medium, stores thereon
There is computer program, all method and steps or Part Methods step of the above method are realized when computer program is executed by processor
Suddenly.
The present invention realizes all or part of the process in the above method, can also be instructed by computer program relevant
Hardware is completed, and computer program can be stored in a computer readable storage medium, which holds by processor
When row, it can be achieved that the step of above-mentioned each embodiment of the method.Wherein, computer program includes computer program code, computer
Program code can be source code form, object identification code form, executable file or certain intermediate forms etc..Computer-readable Jie
Matter may include: can carry computer program code any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic disk,
CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM, R andom
Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that computer-readable
The content that medium includes can carry out increase and decrease appropriate according to the requirement made laws in jurisdiction with patent practice, such as at certain
A little jurisdictions do not include electric carrier signal and telecommunication signal according to legislation and patent practice, computer-readable medium.
Based on the same inventive concept, the embodiment of the present application also provides a kind of electronic equipment, including memory and processor, deposits
The computer program run on a processor is stored on reservoir, processor is realized in the above method when executing computer program
All method and steps or Part Methods step.
Alleged processor can be central processing unit (Central Processing Unit, CP U), can also be it
His general processor, digital signal processor (Digital Signal P rocessor, DSP), specific integrated circuit
(Application Specific Integrated Ci rcuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng processor is the control centre of computer installation, utilizes each portion of various interfaces and the entire computer installation of connection
Point.
Memory can be used for storing computer program and/or module, and processor is stored in memory by operation or execution
Interior computer program and/or module, and the data being stored in memory are called, realize the various function of computer installation
Energy.Memory can mainly include storing program area and storage data area, wherein storing program area can storage program area, at least
Application program needed for one function (such as sound-playing function, image player function etc.)；Storage data area can store basis
Mobile phone uses created data (such as audio data, video data etc.).In addition, memory may include that high speed is deposited at random
Access to memory can also include nonvolatile memory, such as hard disk, memory, plug-in type hard disk, intelligent memory card (Smart M
Edia Card, SMC), secure digital (Secure Digital, SD) card, flash card (F lash Card), at least one disk
Memory device, flush memory device or other volatile solid-state parts.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system, server or calculating
Machine program product.Therefore, the present invention can be used complete hardware embodiment, complete software embodiment or combine software and hardware side
The form of the embodiment in face.Moreover, it wherein includes computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in computer-usable storage medium (including but not limited to magnetic disk storage and optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, equipment (system), server and computer program product
Flowchart and/or the block diagram describe.It should be understood that can be realized by computer program instructions in flowchart and/or the block diagram
The combination of process and/or box in each flow and/or block and flowchart and/or the block diagram.It can provide these calculating
Processing of the machine program instruction to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices
Device is to generate a machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute
For realizing the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram
Device.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. realizing the method for light tune top signal in a kind of WDM PON system, which comprises the following steps:
Coded modulation is carried out to low speed management data, obtains low speed management coding modulation data；
Low speed management coding modulation data is coupled with current signal, generates low speed intensity-modulated current signal；
Image intensifer with low-rate modulation characteristic is using the Strength Changes for modulating electric current, by low speed intensity-modulated current signal
In intensity modulated to high speed luminance flux, light tune top signal is generated, and amplify light tune top signal and high speed business data optical signal.
2. the method as described in claim 1, it is characterised in that: further comprising the steps of:
In the transmitting terminal of ONU, high speed business datagram number and threshold current give laser and high-speed assembly, threshold value electricity respectively
Operating current needed for stream provides laser, high speed business datagram number, which is converted to high speed business data light by laser, to be believed
Number.
3. the method as described in claim 1, it is characterised in that:
The image intensifer with low-rate modulation characteristic is SOA or EDFA.
4. the method as described in claim 1, it is characterised in that:
The image intensifer with low-rate modulation characteristic is integrated with laser and high-speed assembly, or separation is external.
5. realizing the device of light tune top signal in a kind of WDM PON system characterized by comprising
Administrative unit is controlled, is used for: output low speed management data and current signal；
Modulation unit is used for: being carried out coded modulation to low speed management data, is obtained low speed management coding modulation data；
Coupling circuit are used for: low speed management coding modulation data being coupled with current signal, generates low speed intensity-modulated current letter
Number；
Image intensifer with low-rate modulation characteristic, is used for: using the Strength Changes of modulation electric current, by low speed intensity-modulated current
The strength characteristics of signal is modulated on high speed luminance flux, generates light tune top signal, and amplify high speed business data optical signal；
Laser and high-speed assembly: for high speed business datagram number to be converted into high speed business data optical signal.
6. device as claimed in claim 5, it is characterised in that:
The control administrative unit sends low speed by low speed data interface and manages data to modulation unit, controls administrative unit also
Pass through DAC converter output current signal to coupling circuit.
7. device as claimed in claim 5, it is characterised in that:
The image intensifer with low-rate modulation characteristic is SOA or EDFA.
8. device as claimed in claim 5, it is characterised in that:
The image intensifer with low-rate modulation characteristic is integrated with laser and high-speed assembly, or separation is external.
9. device as claimed in claim 5, it is characterised in that:
The modulation unit is specifically used for: in transmitting terminal, encoding to low speed management data, then digital signal is converted to mould
Quasi- signal exports analog signal to coupling circuit by the output pin of modulation unit.
10. device as claimed in claim 5, it is characterised in that: the coupling circuit include first capacitor C1, first resistor
R1, second resistance R2,3rd resistor R3, triode T1, the 4th resistance R4, the second capacitor C2, one end of first capacitor C1 and tune
The output of unit processed is connected, and the other end is separately connected one end of first resistor R1, one end of second resistance R2,3rd resistor R3
One end, another termination power of first resistor R1, the other end ground connection of second resistance R2, the other end of 3rd resistor R3 and three poles
The base stage of pipe T1 is connected, and the emitter ground connection of triode T1, the collector of triode T1 passes through the 4th resistance R4 connection current source,
The collector of triode T1 is also connected with the second capacitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412500.9A CN110190904B (en) | 2019-05-17 | 2019-05-17 | Method and device for realizing optical modulation signal in WDM PON system |
Applications Claiming Priority (1)
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