CN107017951A - A kind of device and method for carrying out security protection to transmission optical signal in a wdm system - Google Patents
A kind of device and method for carrying out security protection to transmission optical signal in a wdm system Download PDFInfo
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- CN107017951A CN107017951A CN201710209894.9A CN201710209894A CN107017951A CN 107017951 A CN107017951 A CN 107017951A CN 201710209894 A CN201710209894 A CN 201710209894A CN 107017951 A CN107017951 A CN 107017951A
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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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/524—Pulse modulation
Abstract
The present invention relates to a kind of device for carrying out security protection to transmission optical signal in a wdm system, including：Launch coding unit：Wdm optical signal is subjected to the optical signal that light wave decomposition multiplex is N roads single wavelength, pumped FIR laser is carried out to obtained each road optical signal, and N roads are transferred to Transmission Fibers after the signal of pumped FIR laser is combined into WDM optical coding signals all the way；Receive decoding unit：The WDM optical coding signals are received, WDM optical coding signals are converted to the optical signal of wdm system, the optical receiver of wdm system is transferred to；Code word control unit：Produce control code word and be respectively transmitted to the transmitting coding unit and receive decoding unit.The invention further relates to a kind of method for carrying out security protection to transmission optical signal in a wdm system.Implement a kind of device and method for carrying out security protection to transmission optical signal in a wdm system of the present invention, have the advantages that：It is more difficult illegally to be stolen, the transmission of signal is safer.
Description
Technical field
The present invention relates to field of signal transmissions, transmission optical signal is carried out in a wdm system more specifically to a kind of
The device and method of security protection.
Background technology
Existing WDM fiber communication system is made up of wdm optical transmitter, WDM photoreceivers and optical fiber, as shown in Figure 1.
Contain the optical sender (1-N) of N number of subscriber signal in wdm optical transmitter, form N number of conventional Single wavelength optical fiber telecommunications system,
Through wavelength division multiplexer, N number of multiplex (MUX) is combined into optical wavelength division multiplexed signal output all the way, distal end is transferred to by optical fiber.Distally
WDM receivers are received after optical wavelength division multiplexed signal, and N number of unicast long channel, each channel point are isolated by Wave decomposing multiplexer
Do not handled through photoreceiver, obtain N number of user profile.The safety that existing WDM fiber communication system presence may be ravesdropping is hidden
Suffer from, because conventional Single wavelength optical fiber telecommunications system works in OOK systems, can just be obtained on optical fiber and be passed with energy-probe
Defeated user profile.Multiple user profile are transmitted in wdm system, security of system is improved.But when listener-in uses frequency spectrum
Analyzer separates a channel from WDM channels, still can just obtain user profile, thus WDM fiber communication system is still
It is unsafe.
The content of the invention
The technical problem to be solved in the present invention is, for the above-mentioned easily by illegal steal information, uneasiness of prior art
Full defect there is provided it is a kind of it is more difficult illegally stolen, safety it is a kind of in a wdm system to transmission optical signal carry out security protection
Device and method.
The technical solution adopted for the present invention to solve the technical problems is：Construction is a kind of to be believed transmission light in a wdm system
Number carry out security protection device, including：
Launch coding unit：It is connected between WDM optical transmitting set and Transmission Fibers, wdm optical signal is subjected to light wave point
The optical signal of N roads single wavelength is demultiplexing as, pumped FIR laser is carried out to obtained each road optical signal, and by N roads by pumped FIR laser
Signal is combined into WDM optical coding signals all the way, and the WDM optical coding signals are transferred into the Transmission Fibers；Wherein, Mei Gexin
The carrier wavelength of the coding light carrier in road is differed；
Receive decoding unit：The WDM optical coding signals are received, the WDM optical coding signals are converted into wdm system
Optical signal, is transferred to the optical receiver of wdm system；
Code word control unit：Produce control code word and be respectively transmitted to the transmitting coding unit and receive decoding unit,
The control code word is used for the parameter for the coding light carrier for controlling each channel, to produce coding different, corresponding to each channel
The decoding optical carrier of light carrier or different, each channel of control output.
Further, the coding light carrier of each channel includes the multiple setting time units being arranged in order respectively, often
Optical wavelength in individual setting time unit is different from the optical wavelength in its adjacent setting time unit；The encoded light of each channel
Optical wavelength in the setting time unit of the same sequence number of carrier wave is different.
Further, the transmitting coding unit further comprise Wave decomposing multiplexer, it is multiple Optical Receivers, multiple
Optical modulator module, light source and transmitting wavelength division multiplexer；The Wave decomposing multiplexer includes the light for being connected to the wdm system
Input and multiple output ends in transmitter output, multiple output ends of the Wave decomposing multiplexer are connected to a light
On the input of receiving module, the output end of an Optical Receivers is connected to the modulated signal input of an optical modulator module
End；The light source includes multiple coding optical carrier output ends, and the input of an optical modulator module is connected to a coding
Optical carrier output end；The output end of optical modulator module is connected to the input of the transmitting wavelength division multiplexer, the transmitting
The output end of wavelength division multiplexer is connected with Transmission Fibers；The output end number of the Wave decomposing multiplexer, Optical Receivers number,
Optical modulator module number, coding light carrier output end number are equal with the input number of transmitting Wavelength division multiplexing module.
Further, the light source includes wide spectrum light source and launch wavelength selecting switch, and the launch wavelength selection is opened
Pass includes input, control end and multiple output ends；The wide spectrum light source produces wide range optical signal and is output to the transmitted wave
The input of long selecting switch, the control end of the launch wavelength selecting switch receives the emission control that code word control unit is produced
Code word is used as transcoding, coding transform control signal so that multiple output ends of the launch wavelength selecting switch are respectively by the wide spectrum optical
Obtained in the optical signal of source input and output meets the coding optical carrier that the control code word is required respectively.
Further, the reception decoding unit includes receiving wavelength-selective switches, multiple smooth burst pulse receiving modules
With reception wavelength division multiplexer；The reception wavelength-selective switches include an input, a control end and multiple output ends；Institute
The input for receiving wavelength-selective switches and Transmission Fibers connection are stated, the control end for receiving wavelength-selective switches is received
The reception control code word that the code word control unit is produced is used as control signal so that the reception wavelength-selective switches it is multiple
Output end exports coding optical carrier that each optical modulator module in the transmitting coding unit is exported, brewed respectively；Institute
The multiple output ends for stating reception wavelength-selective switches are connected respectively to the input of the multiple smooth burst pulse receiving module, one
The output end of light burst pulse receiving module is connected respectively to the input of the reception wavelength division multiplexer, the reception wavelength-division multiplex
The output end of device is connected with the optical receiver of the wdm system.
Further, the brewed coding optical carrier that the smooth burst pulse receiving module is received to it is carried out
Detection, the optical signal modulated simultaneously is output on the respective input mouthful of the reception wavelength division multiplexer.
Further, the control code word includes emission control code word and receives control code word, the emission control code
Word and reception control code word are transported to the transmitting coding unit by independent optical fiber respectively and the reception decodes single
Member.
The invention further relates to a kind of to the method for the optical signal security protection transmitted in wdm system, it is included in wdm system defeated
Go out after the optical signal of multiplexing, the optical signal is handled as follows：
WDM optical signal is decomposed and opto-electronic conversion according to channel, the optical signal of N roads single wavelength, to what is obtained
Each road optical signal carries out pumped FIR laser；Encoded light carrier multiplexing after each Channel Modulation is obtained into WDM pumped FIR lasers, and by the WDM
Pumped FIR laser is transferred to the Transmission Fibers；Wherein, the carrier wavelength of the coding light carrier of each channel is differed；
After wdm system receives the above-mentioned optical signal transmitted on the transmission fiber after processing, the optical signal is carried out
Following processing：
The WDM pumped FIR lasers are received, the WDM pumped FIR lasers are demultiplexing as the letter of the coding light carrier after the modulation of each channel
Number, and demodulated, user's optical signal of each channel is obtained, user's optical signal of obtained each channel is multiplexed with WDM's
Optical signal, is transferred to the optical receiver of wdm system；
Wherein, produce control code word and be respectively used to above-mentioned optical signal prosessing, the control code word is used to control each letter
The parameter of the coding light carrier in road is different, each to produce coding light carrier different, corresponding to each channel or control output
The brewed coding optical carrier of channel.
Further, the coding light carrier of each channel includes the multiple setting time units being arranged in order respectively, often
Optical wavelength in individual setting time unit is different from the optical wavelength in its adjacent setting time unit；The encoded light of each channel
Optical wavelength in the setting time unit of the same sequence number of carrier wave is different.
Further, by controlling the long selecting switch of code word controls ripple so that be input to the letter of the wavelength-selective switches
Each setting wavelength component in number is respectively outputted to the output end of the wavelength-selective switches, thus obtain coding optical carrier or
Coding optical carrier after modulation.
Implement a kind of device and method for carrying out security protection to transmission optical signal in a wdm system of the present invention, have
Following beneficial effect：Due to being just transferred to optical fiber after handling the optical signal transmitted in existing wdm system on optical fiber
On so that in the optical signal transmitted on optical fiber, the carrier wave of a subscriber signal is change, and the rule of change is by controlling
What code word processed was determined, so, in the case where not knowing control code word, even if being intercepted to the optical signal on optical fiber, take
Obtained the optical signal on optical fiber, it is also not possible to intactly demodulate the signal on a channel, and then a user can not possibly be obtained
Signal.So, it is more difficult illegally to be stolen, the transmission of signal is safer.
Brief description of the drawings
Fig. 1 is a kind of being somebody's turn to do for device and method embodiment protected in a wdm system transmission light signals security of the present invention
The structural representation of device；
Fig. 2 is the structural representation of transmitter unit in the embodiment；
Fig. 3 is the structural representation of receiving unit in the embodiment；
Fig. 4 be it is a kind of in the embodiment in the case of first carrier wavelength conversion schematic diagram；
Fig. 5 is a kind of method flow diagram protected in a wdm system transmission light signals security in the embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated.
As shown in figure 1, in a kind of device and side for carrying out security protection to transmission optical signal in a wdm system of the present invention
In method embodiment, for existing wdm system, between the optical transmitting set and optical receiver of wdm system, transmission is directly connected to
The optical signal transmitted on optical fiber, and Transmission Fibers is exactly the multiplexed signals in wdm system.And in Fig. 1, in the light of wdm system
Between transmitter and optical receiver, not only including Transmission Fibers, in addition to transmitting coding unit, reception decoding unit and code
Word control unit, meanwhile, the signal that transmits on the transmission fiber is believed traditional multiplexing nor traditional multiplexed signals
After number being handled, obtained new multiplexed signals, even if this signal is illegally obtained, due to not knowing control code word, because
And can not be decoded.Therefore, it is possible to play a part of protecting transferring content not leak.
In the present embodiment, as shown in figure 1, transmitting coding unit is connected between WDM optical transmitting set and Transmission Fibers,
Wdm optical signal is subjected to the optical signal that light wave decomposition multiplex is N roads single wavelength, light volume is carried out to obtained each road optical signal
Code, and N roads are combined into WDM optical coding signals all the way by the signal of pumped FIR laser, and the WDM optical coding signals are transferred to institute
State Transmission Fibers；N is original channel quantity just having in wdm optical signal, and in other words, wdm optical signal is typically to be believed by N roads
Obtained after number multiplexing；Wherein, the carrier wavelength of the coding light carrier of each channel is differed；And receive the input of decoding unit
End is connected with above-mentioned Transmission Fibers, receives the WDM optical coding signals, the WDM optical coding signals are converted into wdm system
Optical signal, is transferred to the optical receiver of wdm system；Code word control unit is single with above-mentioned transmitting coding unit and reception decoding respectively
Member connection, produces control code word and is respectively transmitted to the transmitting coding unit and receives decoding unit, the control code word is used
In the parameter for the coding light carrier for controlling each channel, to produce coding light carrier different, corresponding to each channel or control defeated
Go out the brewed coding optical carrier of different, each channel.It is noted that in the present embodiment, above-mentioned pumped FIR laser
The channel optical signal for including the WDM that will be obtained carries out opto-electronic conversion, and the light of each channel is carried respectively using obtained electric signal
Ripple carries out coded modulation, so as to obtain the optical coding signal of each channel；After obtained each road optical coding signal is multiplexed, obtain
WDM optical coding signals.
In the present embodiment, the coding light carrier of each channel includes the multiple setting time units being arranged in order respectively,
Optical wavelength in each setting time unit is different from the optical wavelength in its adjacent setting time unit；The coding of each channel
Optical wavelength in the setting time unit of the same sequence number of light carrier is different.In other words, in the present embodiment, wdm system
Multiplexed signals includes multiple channels (i.e. multiple subscriber signals, each subscriber signal uses a channel), and each channel is right
Ying Yuyi coding light carrier, is all by multiple setting time units although its structure of the coding light carrier of each channel is identical
It is arranged in order and forms, but each the wavelength of coding light carrier is different, meanwhile, it is adjacent in a coding light carrier
Light carrier in setting time unit is differed.And encode in the selection and adjustment settings time quantum of the wavelength of light carrier
The change of wavelength, is determined by control code word.In the case where knowing control code word, it also can just obtain obtaining after modulation
Encode the information content that light carrier is carried；And in the case where not knowing control code word, due to unpredictable current setting time
The wavelength of first carrier in unit, the wavelength of next setting time unit interior coding light carrier is not known yet, thus can not be obtained
The information content that coding light carrier after to the modulation is carried.
In the present embodiment, the output of WDM optical transmitting sets is light multiplexing signal, and which includes the light of multiple channels output
Signal.In above-mentioned transmitting coding unit, Fig. 2 is referred to, including Wave decomposing multiplexer, multiple Optical Receivers, multiple light are adjusted
Molding block, light source and transmitting wavelength division multiplexer；The Wave decomposing multiplexer includes the light for being connected to a wdm system transmitting
Input and multiple output ends in device output, multiple output ends of the Wave decomposing multiplexer are connected to a light-receiving
On the input of module, the output end of an Optical Receivers is connected to the modulated signal input of an optical modulator module；Institute
Stating light source includes multiple coding optical carrier output ends, and the input of an optical modulator module is connected to a coding light carrier
Signal output part；The output end of optical modulator module is connected to the input of the transmitting wavelength division multiplexer, and the transmitting wavelength-division is answered
It is connected with the output end of device with Transmission Fibers；The output end number of the Wave decomposing multiplexer, Optical Receivers number, light modulation
Number of modules, coding light carrier output end number are equal with the input number of transmitting Wavelength division multiplexing module.In the present embodiment,
Light source includes wide spectrum light source and launch wavelength selecting switch, and the launch wavelength selecting switch includes input, control end and many
Individual output end；The wide spectrum light source produces wide range optical signal and is output to the input of the launch wavelength selecting switch, described
The emission control code word that the control end of launch wavelength selecting switch receives the generation of code word control unit controls to believe as transcoding, coding transform
Number so that obtained simultaneously in the optical signal that multiple output ends of the launch wavelength selecting switch are inputted by the wide spectrum light source respectively
Output meets the coding optical carrier of the control code word requirement respectively.
For generally, in the present embodiment, the signal transacting for transmitting terminal is exactly by the multiplexing of traditional wdm system
Signal is demultiplexed, and the signal on each channel is obtained by processing, then (one is believed by the subscriber signal on obtained multiple channels
Transmit a subscriber signal in road) as modulated signal, go to modulate the corresponding coding optical carrier of the channel.That is,
In the present embodiment, there are multiple coding optical carriers, each coding optical carrier corresponds to a channel, and each encoded light is carried
Ripple signal is at the same time, and its carrier wavelength is different；For a coding optical carrier, its wavelength is every
Every a setting time cycle, it can all change once；Wavelength conversion situation to encoding optical carrier, refers to Fig. 4.Fig. 4
In give in the present embodiment in the case of one kind, example of the wavelength along time axis conversion of multiple coding optical carriers.
Fig. 3 shows the structural representation that decoding unit is received in the present embodiment.In the present embodiment, decoding unit is received
Including receiving wavelength-selective switches, multiple smooth burst pulse receiving modules and receiving wavelength division multiplexer；The reception wavelength selection is opened
Pass includes an input, a control end and multiple output ends；The input and the biography for receiving wavelength-selective switches
Fine connection is lost, the control end of the reception wavelength-selective switches receives the reception control code word that the code word control unit is produced
It is used as control signal so that multiple output ends of the reception wavelength-selective switches export each in the transmitting coding unit respectively
Optical modulator module output, brewed coding optical carrier；The multiple output ends difference for receiving wavelength-selective switches
The input of the multiple smooth burst pulse receiving module is connected to, the output end of a light burst pulse receiving module is connected respectively to
The input for receiving wavelength division multiplexer, the output end of the reception wavelength division multiplexer and the optical receiver of the wdm system
Connection.The brewed coding optical carrier that the smooth burst pulse receiving module is received to it carries out detection, is modulated
Optical signal and be output on the respective input mouthful of the reception wavelength division multiplexer.
In the present embodiment, control code word includes emission control code word and receives control code word, the emission control code word
Code word is controlled to be transported to the transmitting coding unit and the reception decoding unit by independent optical fiber respectively with described receive.
The effect of emission control code word and reception control code word is so that above-mentioned launch wavelength selecting switch and receives wavelength-selective switches
Output meets the signal of the wavelength of sets requirement in its different output end respectively, so, as long as realizing this purpose in advance,
In the present embodiment, above-mentioned emission control code word and receive control code word can with identical (can be merged into one control code word),
Can also be different, it is necessary to depending on above-mentioned launch wavelength selecting switch and the concrete condition of reception wavelength-selective switches.
The device that WDM optical transmission signals carry out security protection is entered the optical wavelength division multiplexed signal from WDM optical transmitting sets
After row channel separating treatment, each channel receives progress optical-electronic conversion respectively, and narrow light pulse (i.e. encoded light is modulated with this electric signal
Carrier signal), narrow light pulse is produced by wide range Supercontinuum source, or by the narrow pulse width semiconductor gain switch of multiple different wave lengths
Laser group is produced, and by wavelength-selective switches (WSS, Wavelength Selective Switch) module, WSS has one
Or multiple input ports, N number of output port, by computer control, the light that arbitrary port can be inputted or input port input
Light arbitrary portion, be output to WSS any output port (port 1-N), an input port can input one or many
Individual wavelength a, output port can export expected one or more wavelength.The wavelength of each output port of WSS is controlled, i.e.,
The light carrier of convertible channel.The light carrier of each channel is set to carry out frequency hopping change with the time, changing rule will comply with designed
Code word.
In the present embodiment, the reception decoding unit of WDM optical transmission signals safety device is selected by WSS-Drop wavelength
Select the groups such as switch module, multiple smooth burst pulse receiving modules, wavelength division multiplexer, decoded transform control system (not shown)
Into as shown in Figure 3.The WDM pumped FIR lasers come from Transmission Fibers transmission enter WSS-Drop and receive wavelength-selective switches module, in solution
Under decoded transform control signal (receiving control code word) effect that code conversion control system is sent, WSS-Drop receives wavelength choosing
Each output port for selecting switch exports single light carrier, and this carrier wavelength is corresponding to transcoding, coding transform, make WSS-Drop each
The wavelength of the unicast optical signal of output port (1---N) output keeps constant, still respectively λ1、λ2、…、λN.Each road signal point
Not Jin Ru multiple smooth burst pulse receiving modules, be reduced to each single channel subscriber signal of former different wave length, be multiplexed through wavelength division multiplexer
For wdm optical signal.Wherein, when needing, the light burst pulse that above-mentioned smooth burst pulse receiving module is obtained is using delay
Or the means of extension are successively after broadening, exported after making the form that it returns to WDM channel optical signal.
Transcoding, coding transform control system is that each road optical carrier wavelength is controlled by designed coding rule, such as at first
Period τ1It is interior, different wavelength Xs are respectively configured to n-th channel to the 1st channel1To λN；In the 2nd period τ2It is interior, change
The wavelength of each channel；3rd period τ3It is interior, then change the wavelength of each channel, the rest may be inferred, as shown in Figure 4.To any one
Channel, carrier wavelength is changed over time.The determination of period length, and its selection of wavelength is according to designed coding change
Change rule determination.Each period is not necessarily equal.So, listener-in cannot get user profile with spectrum analyzer, from
And system plays safety protection function.
Fig. 5 is referred to, is further related in the present embodiment a kind of to the side for the optical signal security protection transmitted in wdm system
Method, comprises the following steps：
Step S11 demultiplexes the multiplexed signals of wdm system, obtains subscriber signal：In this step, it is wdm system is defeated
The multiplexing optical signal gone out is decomposed and opto-electronic conversion according to channel, obtains the subscriber signal of each channel；
Obtained subscriber signal is modulated corresponding coding optical carrier by step S12 respectively, wherein, coding light carrier letter
Number wavelength change over time：In this step, the encoded light by the subscriber signal of obtained each channel respectively to the channel is carried
Ripple is modulated；Wherein, control code word and the optical signal prosessing being respectively used in this step and later step are produced, code word is controlled
For control each channel coding light carrier parameter, with produce it is different, corresponding to the coding light carrier of each channel or control
The brewed coding optical carrier of different, each channel of output.
Coding optical carrier multiplexing after obtained multiple modulation is obtained WDM pumped FIR lasers by step S13：In this step
In, due to generating multiple brewed coding optical carriers in above-mentioned steps, so by the encoded light after each Channel Modulation
Carrier multiplexing obtains WDM pumped FIR lasers.
WDM pumped FIR lasers are transferred in Transmission Fibers by step S14：In this step, the WDM pumped FIR lasers are transferred to institute
State Transmission Fibers.
Step S15 receives WDM pumped FIR lasers, and obtains exporting the coding optical carrier after modulation by user：In this step
In, above-mentioned WDM pumped FIR lasers (optical signal) reach receiving terminal after transmitting on the transmission fiber, are had not been entered into the WDM pumped FIR lasers
Before the optical receiver of wdm system, it is handled, that is, receives the WDM pumped FIR lasers, the WDM pumped FIR lasers are demultiplexed
For the coding optical carrier after the modulation of each channel.
Step S16 is demodulated to the coding optical carrier after each modulation of output, obtains each subscriber signal：In this step
In, system is demodulated to the coding optical carrier after obtained each modulation, the subscriber signal of each channel is obtained.
Step S17 is multiplexed obtained subscriber signal and is output to the optical receiver of wdm system：In this step, it will obtain
The subscriber signal of each channel be multiplexed with WDM optical signal, be transferred to the optical receiver of wdm system.
In the present embodiment, the coding light carrier of each channel includes the multiple setting time units being arranged in order respectively,
Optical wavelength in each setting time unit is different from the optical wavelength in its adjacent setting time unit；The coding of each channel
Optical wavelength in the setting time unit of the same sequence number of light carrier is different.By controlling the long selecting switch of code word controls ripple, make
Each setting wavelength component that must be input in the signal of the wavelength-selective switches is respectively outputted to the output of the wavelength-selective switches
End, so as to obtain encoding the coding optical carrier after optical carrier or modulation.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of device for carrying out security protection to transmission optical signal in a wdm system, it is characterised in that including：
Launch coding unit：It is connected between WDM optical transmitting set and Transmission Fibers, wdm optical signal is carried out into light wave decomposes multiple
With the optical signal for N roads single wavelength, pumped FIR laser is carried out to obtained each road optical signal, and N roads are passed through to the signal of pumped FIR laser
WDM optical coding signals all the way are combined into, and the WDM optical coding signals are transferred to the Transmission Fibers；Wherein, each channel
The carrier wavelength of coding light carrier is differed；
Receive decoding unit：The WDM optical coding signals are received, the light that the WDM optical coding signals are converted into wdm system is believed
Number, it is transferred to the optical receiver of wdm system；
Code word control unit：Produce control code word and be respectively transmitted to the transmitting coding unit and receive decoding unit, it is described
Control code word is used for the parameter for the coding light carrier for controlling each channel, is carried with producing encoded light different, corresponding to each channel
The decoding optical carrier of ripple or different, each channel of control output.
2. the device according to claim 1 for carrying out security protection to transmission optical signal in a wdm system, its feature exists
In the coding light carrier of each channel is included in the multiple setting time units being arranged in order, each setting time unit respectively
Optical wavelength be different from its adjacent setting time unit in optical wavelength；The same sequence number of the coding light carrier of each channel
Optical wavelength in setting time unit is different.
3. the device according to claim 2 for carrying out security protection to transmission optical signal in a wdm system, its feature exists
In the transmitting coding unit further comprises Wave decomposing multiplexer, multiple Optical Receivers, multiple optical modulator modules, light source
With transmitting wavelength division multiplexer；The Wave decomposing multiplexer is connected in the output of the optical transmitting set of the wdm system including one
Input and multiple output ends, multiple output ends of the Wave decomposing multiplexer are connected to the input of an Optical Receivers
On end, the output end of an Optical Receivers is connected to the modulated signal input of an optical modulator module；The light source includes
Multiple coding optical carrier output ends, the input of an optical modulator module is connected to a coding optical carrier output
End；The output end of optical modulator module be connected to it is described transmitting wavelength division multiplexer input, the transmitting wavelength division multiplexer it is defeated
Go out end to be connected with Transmission Fibers；The output end number of the Wave decomposing multiplexer, Optical Receivers number, optical modulator module
Number, coding light carrier output end number are equal with the input number of transmitting Wavelength division multiplexing module.
4. the device according to claim 3 for carrying out security protection to transmission optical signal in a wdm system, its feature exists
In the light source includes wide spectrum light source and launch wavelength selecting switch, and the launch wavelength selecting switch includes input, control
End and multiple output ends；The wide spectrum light source produces wide range optical signal and is output to the input of the launch wavelength selecting switch
End, the emission control code word that the control end reception code word control unit of the launch wavelength selecting switch is produced is used as transcoding, coding transform
Control signal so that in the optical signal that multiple output ends of the launch wavelength selecting switch are inputted by the wide spectrum light source respectively
Obtain and output meets the coding optical carrier that the control code word is required respectively.
5. the device according to claim 4 for carrying out security protection to transmission optical signal in a wdm system, its feature exists
In the reception decoding unit includes receiving wavelength-selective switches, multiple smooth burst pulse receiving modules and receives wavelength division multiplexer；
The reception wavelength-selective switches include an input, a control end and multiple output ends；The reception wavelength selection is opened
The input of pass and Transmission Fibers connection, the control end for receiving wavelength-selective switches receive the code word control unit
The reception control code word of generation is used as control signal so that multiple output ends of the reception wavelength-selective switches export institute respectively
State coding optical carrier that each optical modulator module in transmitting coding unit is exported, brewed；The reception wavelength selection is opened
The multiple output ends closed are connected respectively to the input of the multiple smooth burst pulse receiving module, a light burst pulse receiving module
Output end be connected respectively to it is described reception wavelength division multiplexer input, the output end of the reception wavelength division multiplexer with it is described
The optical receiver connection of wdm system.
6. the device according to claim 5 for carrying out security protection to transmission optical signal in a wdm system, its feature exists
In the brewed coding optical carrier that the smooth burst pulse receiving module is received to it carries out detection, is modulated
Optical signal is simultaneously output on the respective input mouthful of the reception wavelength division multiplexer.
7. the device according to claim 6 for carrying out security protection to transmission optical signal in a wdm system, its feature exists
In the control code word includes emission control code word and receives control code word, the emission control code word and reception control
Code word is transported to the transmitting coding unit and the reception decoding unit by independent optical fiber respectively.
8. a kind of method that security protection is carried out to the optical signal transmitted in wdm system, it is characterised in that be included in wdm system
After the optical signal for exporting multiplexing, the optical signal is handled as follows：
WDM optical signal is decomposed and opto-electronic conversion according to channel, the optical signal of N roads single wavelength, to obtained each road
Optical signal carries out pumped FIR laser；Encoded light carrier multiplexing after each Channel Modulation is obtained into WDM pumped FIR lasers, and the WDM light is compiled
Code is transferred to the Transmission Fibers；Wherein, the carrier wavelength of the coding light carrier of each channel is differed；
After wdm system receives the above-mentioned optical signal transmitted on the transmission fiber after processing, the optical signal is carried out as follows
Processing：
The WDM pumped FIR lasers are received, the WDM pumped FIR lasers are demultiplexing as the coding optical carrier after the modulation of each channel,
And demodulated, user's optical signal of each channel is obtained, the light that user's optical signal of obtained each channel is multiplexed with into WDM is believed
Number, it is transferred to the optical receiver of wdm system；
Wherein, produce control code word and be respectively used to above-mentioned optical signal prosessing, the control code word is used to control each channel
The parameter of light carrier is encoded, different, each channel is exported to produce coding light carrier different, corresponding to each channel or control
Brewed coding optical carrier.
9. method according to claim 8, it is characterised in that the coding light carrier of each channel includes being arranged in order respectively
Multiple setting time units, the optical wavelength in each setting time unit is different from the light in its adjacent setting time unit
Wavelength；Optical wavelength in the setting time unit of the same sequence number of the coding light carrier of each channel is different.
10. method according to claim 9, it is characterised in that by controlling the long selecting switch of code word controls ripple so that defeated
Each setting wavelength component entered into the signal of the wavelength-selective switches is respectively outputted to the output end of the wavelength-selective switches, from
And obtain encoding the coding optical carrier after optical carrier or modulation.
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| CN201710209894.9A CN107017951B (en) | 2017-03-31 | 2017-03-31 | A kind of device and method carrying out security protection to transmission optical signal in a wdm system |
| PCT/CN2017/084240 WO2018176590A1 (en) | 2017-03-31 | 2017-05-12 | Device and method for performing safety protection on optical signal to be transmitted in wdm system |
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| WO2018176590A1 (en) | 2018-10-04 |
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