CN206698225U - Ultra-high-speed all-optical data real-time encryption/decryption system based on composite logic - Google Patents
Ultra-high-speed all-optical data real-time encryption/decryption system based on composite logic Download PDFInfo
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Abstract
For solving current physical layer full gloss data easy to break, be difficult to encrypt hypervelocity data scheduling problem in real time, the utility model provides a hypervelocity full gloss data real-time encryption/decryption system based on complex logic. The encryption system comprises a first random key generation unit and a composite logic encryption unit; the first random key generation unit comprises a first pseudo-random code generator and a first electro-optical modulator which are connected in series, wherein the input end of the first electro-optical modulator is connected with a first laser; the composite logic encryption unit comprises a first optical fiber amplifier, a first optical filter and a second optical filter; the input end of the first optical fiber amplifier is used for receiving ultrahigh-speed all-optical data to be encrypted and an optical domain random encryption key output by the first random key generation unit, the output end of the first optical fiber amplifier is respectively connected with the input ends of the first optical filter and the second optical filter through the first high nonlinear optical fiber, and the output of the first optical filter and the output of the second optical filter are coupled and then used as the output of the real-time encryption system.
Description
Technical field
The utility model belongs to Optic network technology field, and in particular to all-optical network physical layer super high speed all-optical data
Real-time enciphering/deciphering system.
Background technology
It is much extremely sensitive with ultrahigh speed, the structure of Large Copacity optical transport network and the cost-benefit raising of IP network
Information, such as financial transaction, medical records, begin through internet transmission.Modern cryptographic algorithms are mainly directed towards Internet, passed
Defeated layer or session layer, and the safe encryption technology of physical layer does not cause excessive concern, therefore the all-optical network physics number of plies at present
It is open mode according to transmission, the transmission of super high speed all-optical data and network control command etc. is all without any encryption, thus
The great risk that magnanimity information is given away secrets be present.
The development of domestic and international various optical fiber Eavesdroppings causes the eavesdropping to physical layer data information only to obtain in optical fiber
Extremely low optical signal power can be achieved.For example, single-photon detecting survey technology can detect 5 × 10-13W light energy, optical fiber chain
Road monitoring device can not find the decay of this extremely low luminous power at all.Therefore magnanimity sensitive information is easy to be ravesdropping and cause
Huge economic loss.And for example " Jimmy's Ka Te " submarines possess submarine optical fiber cable eavesdropping function, can pacify wiretap in the U.S.
It is attached to the long-term normal work monitored without influenceing optical cable on optical cable.In addition, malicious user can by attack amplification link module,
Route switch module etc. extracts information, validated user can also be pretended to be to be carried out using channel interference and optical cable information leakage defect non-
Method is eavesdropped.
Mainly have currently for physical layer super high speed all-optical data encryption measure：Performance research of spectrum encoding (SAE) combines spectrum
The encryption technologies such as time delay coding (SDE), optical code division multiple access, light frequency hopping, quantum-key distribution and full light XOR.These encryption sides
Method presence realization is complicated, easily crack, encryption rate is relatively low, is difficult to the problems such as practical, as SAE combinations SDE will be carried out to spectrum
Split and reconfigure, realize complexity and be unsuitable for wide-band communication system；Optical code division multiple access has been demonstrated easily to crack；Light frequency hopping
Encryption rate is limited to photoswitch frequency, can not realize that Ultrahigh speed data is encrypted；Quantum-key distribution is influenceed greatly by system noise
And it is unsuitable for telecommunication system.
Utility model content
Easily cracked to solve existing physical layer all-optical data, be difficult to the problems such as real-time encrypted Ultrahigh speed data, this practicality is new
Type provides a kind of real-time enciphering/deciphering system of the super high speed all-optical data based on compound logic.
Technical principle of the present utility model is：When two-beam transmits in highly nonlinear optical fiber, in the work of nonlinear dielectric
Under, non-linear four-wave mixing effect (FWM) and Nonlinear and crossing phase-modulation effect (XPM) can be produced simultaneously, and this practicality is new
Type is based on real-time encryption and decryption of the simultaneous instantaneous nonlinearity effect realization of above two to super high speed all-optical data.
The concrete technical scheme that the utility model solves above-mentioned technical problem is as follows：
The real-time encrypted system of super high speed all-optical data based on compound logic, it is characterized in that：It is random including first
Key generating unit and compound logic ciphering unit；
The first random key generation unit includes the first pseudo-noise code generator and the first electrooptic modulator of series winding,
Wherein, the input of first electrooptic modulator is also associated with first laser device；
The compound logic ciphering unit includes the first fiber amplifier, the first optical filter and the second optical filter；Institute
The input for stating the first fiber amplifier is used to receive super high speed all-optical data to be encrypted and first random key generation list
The area of light random encryption key of member output, the output end of the first fiber amplifier by the first highly nonlinear optical fiber respectively with it is described
The input of first optical filter and the second optical filter is connected, the output coupling of first optical filter and the second optical filter
Output after conjunction as real-time encrypted system.
In order to improve the light ciphertext signal quality of real-time encrypted system generation, above-mentioned first random key generation unit is also wrapped
Include the first tunable attenuator and the first optical delay line, the input of the first tunable attenuator and first electrooptic modulator
Output end be connected, the output end of the first tunable attenuator is connected with the input of first optical delay line, and the first light prolongs
When line output end be connected with first fiber amplifier；Above-mentioned compound logic ciphering unit also includes the second tunable decay
Device；Second tunable attenuator is used to receiving and adjusting super high speed all-optical data luminous power to be encrypted, and will be treated after regulation
First fiber amplifier described in the super high speed all-optical data input of encryption.
Further, above-mentioned first laser device is the tunable pulse laser of 1550nm band wavelengths, first electricity
Optical modulator is LiNbO3 electrooptic modulators, and the first tunable attenuator and the second tunable attenuator are that luminous power is adjustable
Humorous attenuator, the bandpass optical filtering device of tunable wave length centered on first optical filter and the second optical filter, described
One highly nonlinear optical fiber is the special optical fiber that nonlinear factor is higher than general single mode fiber.
The utility model additionally provides a kind of super high speed all-optical data real time decrypting system based on compound logic, and its is special
Part is：Including the second random key generation unit and compound logic real time decrypting unit；
The random key generation unit includes clock synchronization unit, the second pseudo-noise code generator and the being sequentially connected
Two electrooptic modulators, wherein, the input of second electrooptic modulator is also associated with second laser；
The compound logic real time decrypting unit includes the first beam splitter, the second beam splitter, the second fiber amplifier, the 3rd
Fiber amplifier, first annular device, the second circulator and the 3rd optical filter；
First beam splitter is used for the area of light random decryption key point of the second random key generation unit output
Into two-way, second beam splitter is used to super high speed all-optical ciphertext to be decrypted being divided into two-way：Area of light decryption random is close all the way
Key and all the way super high speed all-optical ciphertext coupling after enter second fiber amplifier in, another way area of light random decryption key and
Enter after the coupling of another way super high speed all-optical ciphertext in the 3rd fiber amplifier；
Along the propagation path of light, multiple port orders of the first annular device and the second circulator are numbered respectively；Institute
The output end for stating the second fiber amplifier is connected with a port of the first annular device, the 3rd fiber amplifier
Output end is connected with a port of second circulator, second port of the first annular device and second ring
Second port of shape device is connected by the second highly nonlinear optical fiber, the 3rd port of the first annular device and described second
3rd port of circulator is connected with the input of the 3rd optical filter simultaneously, the output end of the 3rd optical filter
For the output end of real time decrypting system.
Above-mentioned random key generation unit also includes the 3rd tunable attenuator and the second optical delay line, and the 3rd tunable declines
The input for subtracting device is connected with the output end of second electrooptic modulator, output end and the second light of the 3rd tunable attenuator
The input of delay line is connected, the output end of the second optical delay line respectively with second fiber amplifier and the 3rd fiber amplifier
Device is connected；Above-mentioned compound logic real time decrypting unit also includes the 4th tunable attenuator；4th tunable attenuator is used to connect
The luminous power of super high speed all-optical ciphertext to be decrypted is received and adjusted, and the super high speed all-optical ciphertext to be encrypted after regulation is inputted
Second beam splitter.
Above-mentioned second laser is the tunable pulse laser of 1550nm band wavelengths, and second electrooptic modulator is
LiNbO3 electrooptic modulators, the 3rd tunable attenuator and the 4th tunable attenuator are the tunable attenuator of luminous power,
The bandpass optical filtering device of tunable wave length centered on 3rd optical filter, second highly nonlinear optical fiber are nonlinear system
Special optical fiber of the number higher than general single mode fiber；The first annular device, the second circulator are 3 port one-way transmission fibre devices
Part.
The utility model provides a kind of real-time encrypted method of super high speed all-optical data based on compound logic simultaneously, and it is special
Different part is：Comprise the following steps：
1) area of light random encryption key is produced
1.1) the first electrical domain pseudo-random sequence and reference clock are produced using the first pseudo-noise code generator；
1.2) the first electrical domain pseudo-random sequence is loaded onto what first laser device exported by the first electrooptic modulator
On pulse laser carrier wave, area of light random encryption key is produced；
2) full light is real-time encrypted
2.1) area of light random encryption key caused by step 1) and super high speed all-optical data to be encrypted are together injected into
First fiber amplifier carries out luminous power amplification；
2.2) by the area of light random encryption key and super high speed all-optical data one after first fiber amplifier amplification
With the first highly nonlinear optical fiber is injected into, patrol the real-time difference that produces between area of light random encryption key and super high speed all-optical data
Volume；
2.3) different ripples are carried out in the first highly nonlinear optical fiber output end using the first optical filter and the second optical filter
Strong point filters, then two wavelength exported to the first optical filter and the second optical filter couple, and being formed has compound patrol
The light ciphertext collected.
As optimization, before the full light of step 2) is real-time encrypted, the first tunable attenuator and the first optical delay line are utilized
Respectively regulating step 1.2) caused by area of light random encryption key power and pulse position, utilize the second tunable attenuator
The luminous power of super high speed all-optical data to be encrypted is adjusted, makes the super high speed all-optical data to be encrypted and the light
The power of domain random encryption key is equal, pulse position overlaps.In actual implementation process, after this step can ensure encryption
Light ciphertext signal quality is more preferable；Because compound logic is realized based on nonlinear effect, and to produce more efficient non-linear
Effect, it is desirable to which the two-beam power and bit of input, which is put, to match, and this step is to ensure that the power and bit of two-beam is put more to match
And the operation taken.
The utility model additionally provides a kind of super high speed all-optical data real time decrypting method based on compound logic simultaneously, its
It is characterized in that：Comprise the following steps：
1) area of light random decryption key is produced
1.1) processing is synchronized to the reference clock for encrypting end and obtains reference clock, and by reference clock injection the
Two pseudo-noise code generators；
1.2) reference clock is based on, second electrical domain synchronous with encryption end is produced using the second pseudo-noise code generator
Pseudo-random sequence, the second electrical domain pseudo-random sequence is loaded onto to the light of second laser output by the second electrooptic modulator
In pulse, area of light random decryption key is produced；
1.3) area of light random decryption key is divided into two-way by the first beam splitter；
2) full light real time decrypting
2.1) the super high speed all-optical ciphertext after regulation is divided into two-way using the second beam splitter；
2.2) will area of light random decryption key and light ciphertext is injected after being coupled in the second fiber amplifier all the way all the way,
The 3rd fiber amplifier is injected after another way area of light random decryption key and another way light ciphertext are coupled；
2.3) random decryption key of area of light all the way of second fiber amplifier output and light ciphertext are passed through into the first ring
Shape device is injected into the second highly nonlinear optical fiber, then is exported from the second circulator；By the another of the 3rd fiber amplifier output
Area of light random decryption key and light ciphertext are injected into second highly nonlinear optical fiber by the second circulator all the way, then from
One circulator exports；
2.4) the two-way light exported to the first annular device and second circulator couples, and the heart in particular embodiments
Filtered at wavelength, form compound logic, realize the real time decrypting to ultra high-speed optical ciphertext.
As optimization, first pass through the 3rd tunable attenuator before the step 1.3) and the second optical delay line is adjusted respectively
Save the luminous power and pulse position of area of light random decryption key caused by the step 1.2)；First with the before the step 2.1)
Four tunable attenuators receive and adjust the luminous power of super high speed all-optical ciphertext.This step is in order that two-beam has matching
Power and bit is put, and is specifically tuned up or is turned down, to be operated according to both power, final purpose is to ensure that two beams
The power of light is equal, position overlaps, and so as to produce efficient nonlinear effect, forms compound logic, makes the letter of the decryption of output
Number better quality.
The advantages of the utility model, is as follows：
(1) the utility model is encrypted to super high speed all-optical data using compound logic, and super high speed all-optical data are divided at random
It is fitted in two output wavelengths of compound logic, ciphertext is not easy to intercept and capture, and confidentiality is higher；Compound logic decryption logic and technical side
Case and encryption logic and technical scheme differ, and confidentiality is higher, realize the safe transmission of ultra high-speed optical data.
(2) the utility model employs the enciphering/deciphering that ultrafast optical nonlinearity realizes super high speed all-optical data, non-linear sound
The instantaneity answered ensure that enciphering/deciphering system is capable of the Tbit/s magnitudes more high data rate of compatible following appearance, and to super
Modulation system (such as phase-modulation PSK standards), pattern and the host-host protocol of high speed optical data, being capable of all-transparents without particular/special requirement
Encrypt differing transmission protocols various standard optical signals, finally realize a kind of practical compatibility of multi-rate, modulation format with
The transparent super high speed all-optical enciphering/deciphering system of host-host protocol.
(3) reference clock of pseudo-random code generator of the utility model based on encryption end, it is same to enter row clock in decrypting end
Corresponding key is directly generated after step, without specific safety channel carry out area of light random key transmission, simplify system architecture and
Cost, while key risk of giving away secrets is greatly reduced.
Brief description of the drawings
Fig. 1 is system principle schematic diagram of the present utility model；
Fig. 2 is the principle schematic of the real-time encrypted part of full light；
Fig. 3 is the principle schematic of full light real time decrypting part；
Fig. 4 is that the real-time encrypted experiment of full light measures spectrogram；
Fig. 5 is that the experiment of full light real time decrypting measures spectrogram.
Embodiment
In order to be illustrated to the utility model, technical principle of the present utility model is described in detail first here：
Wave equation when light pulse is transmitted in a fiber can be written as：
Wherein E be light pulse electric field, c be optical fiber in light propagation speed, μ0For magnetic conductivity in vacuum, PLAnd PNLIt is respectively
The linear segment and non-linear partial of induced polarization intensity, and
Wherein ε0For dielectric constant in vacuum, χ(3)For three rank electric susceptibilities, E (r, t) is the Electric Field Distribution of light pulse, when
Two-beam E1And E2When being transmitted in highly nonlinear optical fiber, the light field for injecting highly nonlinear optical fiber is represented by：
WhereinIt is the unit vector of polarization direction, ω1And ω2It is the carrier frequency of two input lights, c.c (complex
Conjugation complex conjugate, and amplitude E corresponding to hypothesis) are represented1And E2It is the slowly varying function of time, in high nonlinear coefficient
In the presence of γ, generation is shown below nonlinear polarization intensity：
In above formula four nonlinear polarization strength components respectively with E1And E2It is relevant：
WhereinFor effective non-linear parameter.
(5) P in formulaNL(2ω1-ω2) and PNL(2ω2-ω1) represent in addition to light frequency is inputted separately there is new frequency content 2
ω1-ω2With 2 ω2-ω1Generation, this is lower caused in the effect of four-wave mixing (FWM) nonlinear effect.And PNL(ω1) and
PNL(ω2) represent nonlinear polarization refractive index contribution, by PNL(ω1) and PNL(ω2) write as following form：
Wherein ωjFor the carrier frequency of jth (j=1,2) individual light field,For nonlinear dielectric constant corresponding to j-th of light field, then
Total induced polarization intensity is
P(ωj)=ε0εjEj
In formula It is the linear segment of refractive index, Δ njIt is Third-order nonlinearity
The knots modification of the refractive index of sensing, can be approximately by the non-linear partial of refractive index
Wherein n2For the nonlinear viscoelastic piles of medium, above formula shows, refractive index not only with some light wave in optical fiber from
The intensity of body is relevant, but also relevant with the intensity of other light waves of common transport, when light wave transmits in a fiber, can obtain
One nonlinear phase shift relevant with intensity：
C is the light velocity in medium in above formula, and z is optical transmission direction axle, 2 | E3-j|2Come from another light wave pair of common transport
The phase-modulation of the ripple, referred to as Cross-phase Modulation (XPM) effect.
It is can be seen that from theory deduction process above when two-beam transmits in highly nonlinear optical fiber, non-linear
In the presence of medium, non-linear four-wave mixing effect (FWM) and Nonlinear and crossing phase-modulation effect (XPM) can be produced simultaneously,
The utility model is based on the simultaneous instantaneous nonlinearity effect of above two and realized to the real-time of super high speed all-optical data
Encryption and decryption.
It is principle schematic of the present utility model shown in reference picture 1.Super high speed all-optical data are carried out using the utility model
Method for encryption/decryption is specially in real time：
【1】Encryption
1.1 area of light random encryption key produce
Shown in reference picture 2, electrical domain pseudo-random sequence and reference clock are produced using the first pseudo-noise code generator；By electrical domain
Pseudo-random sequence is loaded onto on the pulse laser carrier wave of first laser device output by the first electrooptic modulator, produce area of light with
Machine encryption key K (wavelength λK)；And area of light random encryption key K luminous power is adjusted by the first tunable attenuator, lead to
Cross the first optical delay line regulation area of light random encryption key K pulse position；
1.2 full light are real-time encrypted
Shown in reference picture 2, adjusting super high speed all-optical data D to be encrypted by the second tunable attenuator, (wavelength is
λD) luminous power；Then by area of light accidental enciphering caused by the super high speed all-optical data D to be encrypted after regulation and step 1.1
Key K, which is together injected into the first fiber amplifier, carries out luminous power amplification (will produce non-linear effect in highly nonlinear optical fiber
Should be, it is necessary to which very high luminous power could occur, luminous power is amplified to 30dBm in actual realization), generation has high-power area of light
Random encryption key and super high speed all-optical data；Area of light random encryption key after amplification together injects with super high speed all-optical data
To the first highly nonlinear optical fiber, excited simultaneously in the first highly nonlinear optical fiber transient state four-wave mixing (FWM) nonlinear effect and
Cross-phase Modulation (XPM) nonlinear effect.
Under FWM effects, caused new frequency content (wavelength λ1And λi) light field is：
Wherein A1And AiFor the new slow transforming amplitudes for producing light field, γ is the nonlinear factor of highly nonlinear optical fiber, PDAnd PK
To be respectively super high speed all-optical data D to be encrypted and area of light random encryption key K power, θ=[Δ k-3 γ (PD+PK)]z。
As can be seen that frequency caused by new is divided into whole modulation intelligences that light carries original all-optical data.
Under XPM effects, the nonlinear phase of super high speed all-optical data D to be encrypted by area of light random encryption key K
Nonlinear phase shift is caused by modulation：
Wherein γ is the nonlinear factor of highly nonlinear optical fiber, and L is highly nonlinear optical fiber length, ADAnd AKIt is respectively to be added
Close super high speed all-optical data D and area of light random encryption key K amplitude, the effect of nonlinear phase shift are to make superelevation to be encrypted
Fast all-optical data D wavelength XDFrequency spectrum obtained broadening, as shown in Fig. 2.
λ is filtered out using the first optical filterDDwell portion (wavelength λ0) it is designated as Y0, filtered out using the second optical filter
λ1It is designated as Y1, then the real-time encrypted compound logic truth table of full light based on instantaneous nonlinearity effect is：
Compound logic expression formula is：
Y1=KD
It is can be seen that from above-mentioned compound logic truth table and compound logic expression formula when area of light random encryption key K is 0
When, super high speed all-optical data D to be encrypted is replicated in wavelength Y0 and is transmitted in real time, when area of light random encryption key K is 1,
Super high speed all-optical data D to be encrypted is replicated in wavelength Y1 and is transmitted in real time, under the control of area of light random encryption key,
Super high speed all-optical data D real-time Transmissions on different wave length to be encrypted, using coupler by λ0And λ1Coupled, form tool
There is the light ciphertext of compound logic, realize to the real-time encrypted of super high speed all-optical data.
【2】Transmission
Light ciphertext is transmitted separately to data receiver caused by reference clock caused by step 1.1 and step 1.2.
【3】Decryption
3.1 area of light random decryption keys produce
Shown in reference picture 3, by step【2】The reference clock of transmission by clock synchronization unit handle, as reference when
Clock is injected into the second pseudo-noise code generator；Second pseudo-noise code generator is based on reference clock, produces synchronous with encryption end
Electrical domain pseudo-random sequence, and caused electrical domain pseudo-random sequence is loaded onto by second laser by the second electrooptic modulator and exported
Pulse train on, formed area of light random decryption key；Using the 3rd tunable attenuator and the second optical delay line to area of light with
Machine decruption key carry out power adjusting and pulse position regulation, and by the first beam splitter will adjust after area of light random decryption key
Be divided into two-way；
3.2 full light real time decryptings
Shown in reference picture 3, the super high speed all-optical ciphertext that real time decrypting system receives is entered by the 4th tunable attenuator
After row power adjusting, it is divided into two-way light ciphertext Y through the second beam splitter0And Y1；The two-way light ciphertext and two-way caused by step 3.1
Area of light random decryption key is coupled respectively；Two-way light after coupling is injected separately into the second fiber amplifier and the 3rd optical fiber
Amplifier carries out power amplification；
Second fiber amplifier amplifies output high-power light ciphertext Y0 and area of light random decryption key K from first annular device
1# ports 11 enter, and are injected into from the 2# ports 12 of first annular device in the second highly nonlinear optical fiber, generation XPM effects, and from
The 3# ports 23 of second circulator export；
Under XPM effects, area of light random decryption key K is by light ciphertext Y0Nonlinear Phase Modulation caused by it is non-linear
Phase shift is：
Wherein γ be the second highly nonlinear optical fiber nonlinear factor, L be the second highly nonlinear optical fiber length, A0And AK
Respectively light ciphertext Y0With the amplitude of area of light random decryption key, the effect of nonlinear phase shift is to make area of light random decryption key K
Frequency spectrum obtained broadening.
3rd fiber amplifier amplifies output high-power light ciphertext Y1 and area of light random decryption key from the second circulator
1# ports 21 enter, and are injected into from the 2# ports 22 of the second circulator in the second highly nonlinear optical fiber, generation XPM effects, and from
The 3# ports 13 of first annular device export；
Under XPM effects, area of light random decryption key K is by light ciphertext Y1Nonlinear Phase Modulation caused by it is non-linear
Phase shift is：
Wherein A1Light ciphertext Y1Amplitude, the effect of nonlinear phase shift is that the frequency spectrum for making area of light random decryption key K obtains
Broadening.
By selecting the centre wavelength of the 3rd optical filter, the ripple of area of light random decryption key K video stretchings part is filtered out
Long λD, then light data (wavelength λ is exportedD) and light ciphertext Y0, light ciphertext Y1It is and compound between area of light random decryption key K
Logic true value table is：
Compound logic expression formula is：
It is can be seen that from above-mentioned compound logic truth table and compound logic expression formula when area of light random decryption key K is 0
When, by light ciphertext Y0Real time decrypting is on all-optical data D, when area of light random decryption key K is 1, by light ciphertext Y1Solution in real time
It is close on all-optical data D, it is achieved thereby that the real time decrypting of super high speed all-optical data, reduces super high speed all-optical data.
Feasibility of the present utility model can be verified by following experiment embodiment：
Embodiment：The real-time enciphering/deciphering of super high speed all-optical data that traffic rate is 10Gbit/s, wavelength is 1550.12nm
First, case verification system
Reference picture 1, this case verification system is by the instruments such as laser, image intensifer, attenuator, highly nonlinear optical fiber and light
The test devices such as spectrometer are formed.It is 10Gbit/s according to following steps completion traffic rate, the ultrahigh speed that wavelength is 1550.12nm
The real-time enciphering/deciphering system of all-optical data.
【1】Encryption
1.1 area of light random encryption key produce
Shown in reference picture 2, by the use of commercial Error Detector as the first pseudo-noise code generator, generation speed is 10Gbit/s
Electrical domain pseudo-random sequence and 10MHz reference clock；By electrical domain pseudo-random sequence by the electrooptic modulators of LiNbO3 first,
It is loaded onto on the pulse laser carrier wave of first laser device output, generation speed is 10Gbit/s, the area of light that wavelength is 1562.62nm
Random encryption key K；And area of light random encryption key K power is adjusted by the first tunable attenuator and the first optical delay line
And pulse position；
1.2 full light are real-time encrypted
Shown in reference picture 2, super high speed all-optical data D (speed 10Gbit/s, wavelength 1550.12nm) to be encrypted input
Second tunable attenuator of real-time encrypted system, its luminous power is adjusted by the second tunable attenuator；Then with step 1.1
Caused area of light random encryption key K is together injected into the first fiber amplifier and carries out luminous power amplification, and generation has high power
Area of light random encryption key and super high speed all-optical data；Area of light random encryption key and super high speed all-optical data one after amplification
It is same to be injected into the first highly nonlinear optical fiber that nonlinear factor is 11W/km, length is 100m, in the first highly nonlinear optical fiber
Excite transient state four-wave mixing (FWM) nonlinear effect and Cross-phase Modulation (XPM) nonlinear effect simultaneously.Under FWM effects,
Caused new frequency content and it is new caused by frequency be divided into whole modulation intelligences that light carries original all-optical data, such as Fig. 4 institutes
Show.Under XPM effects, all-optical data is produced nonlinear phase shift by the nonlinear Phase Modulation of area of light random encryption key, makes
All-optical data λDFrequency spectrum obtained broadening, as shown in Figure 4.
λ is filtered out using the first optical filterDDwell portion (wavelength λ0) it is designated as Y0, filtered out using the second optical filter
λ1It is designated as Y1, then based on instantaneous nonlinearity effect full light encryption compound logic truth table be：
Compound logic expression formula is：
Y1=KD
It is can be seen that from above-mentioned compound logic truth table and compound logic expression formula when area of light random encryption key K is 0
When, all-optical data D is replicated in wavelength Y0 and is transmitted in real time, and when area of light random encryption key K is 1, all-optical data D is multiple in real time
System is transmitted in wavelength Y1, under the control of area of light random encryption key, all-optical data real-time Transmission on different wave length, and profit
With coupler by λ0And λ1Coupled, form the light ciphertext with compound logic, realized and the real-time of super high speed all-optical data is added
It is close.
【2】Transmission
10Gbit/s light ciphertexts are transmitted separately to data caused by 10MHz reference clocks caused by step 1.1 and step 1.2
Receiving terminal.
【3】Decryption
3.1 area of light random decryption keys produce
Shown in reference picture 3, by step【2】The 10MHz reference clocks of transmission are handled by clock synchronization unit, as ginseng
Examine clock and be injected into the second pseudo-noise code generator；Using commercial Error Detector as the second pseudo-noise code generator, based on reference
Clock produces the 10Gbit/s electrical domain pseudo-random sequence synchronous with encryption end, and will be produced by the electrooptic modulators of LiNbO3 second
10Gbit/s electrical domain pseudo-random sequences be loaded onto wavelength be 1550.12nm second laser export pulse train on, shape
Into area of light random decryption key K；Area of light random decryption key K is carried out using the 3rd tunable attenuator and the second optical delay line
Power adjusting and pulse position regulation, and two-way is divided into by the first beam splitter；
3.2 full light real time decryptings
Shown in reference picture 3, the super high speed all-optical ciphertext that receives after the 4th tunable attenuator carries out power adjusting,
It is divided into two-way Y through the second beam splitter0And Y1；The two-way light ciphertext is distinguished with two-way area of light random decryption key caused by step 3.1
Coupled；Two-way light after coupling is injected separately into the second fiber amplifier and the 3rd fiber amplifier and carries out power amplification；
The high power light ciphertext Y of second fiber amplifier amplification output0It is injected into area of light random decryption key K by first annular device
The second highly nonlinear optical fiber that nonlinear factor is 10.6W/km, length is 300m, XPM effects are produced, and from the second circulator
Port 23 export；Under XPM effects, area of light random decryption key K is by light ciphertext Y0Nonlinear Phase Modulation produce it is non-
Linear phase shift, area of light random decryption key K frequency spectrum is set to have obtained broadening, as shown in Figure 5.The amplification output of 3rd fiber amplifier
High power light ciphertext Y1The second highly nonlinear optical fiber is injected into by the second circulator with area of light random decryption key K, produces XPM
Effect, and exported from the port 13 of first annular device；Under XPM effects, area of light random decryption key K is by light ciphertext Y1It is non-
Linear phase modulation produces nonlinear phase shift, area of light random decryption key K frequency spectrum has been obtained broadening, as shown in Figure 5.
By selecting the centre wavelength of the 3rd optical filter, the ripple of area of light random decryption key K video stretchings part is filtered out
Long λD, then light data (wavelength λ is exportedD) and light ciphertext Y0, light ciphertext Y1It is and compound between area of light random decryption key K
Logic true value table is：
Compound logic expression formula is：
It is can be seen that from above-mentioned compound logic truth table and compound logic expression formula when area of light random decryption key K is 0
When, by light ciphertext Y0Real time decrypting is on all-optical data D, when area of light random decryption key K is 1, by light ciphertext Y1Solution in real time
It is close on all-optical data D, it is achieved thereby that the real time decrypting of super high speed all-optical data, reduces super high speed all-optical data.
Above-described embodiment shows, the super high speed all-optical data provided by the utility model based on compound logic add in real time/
Decryption method can realize the real-time encrypted and decryption function of super high speed all-optical data with system.The utility model is based on high non-thread
Property optical fiber in instantaneous nonlinearity effect realize the real-time enciphering/deciphering functions of super high speed all-optical data, it is easily key with existing fiber
The network integration, and decryption logic and technical scheme and encryption logic and technical scheme differ, confidentiality is higher；In addition it is instantaneous
Nonlinear effect realize the real-time synchronization enciphering/deciphering of super high speed all-optical data have a variety of data rates are compatible, modulation format with
The advantages of host-host protocol is transparent, it ensure that enciphering/deciphering system is capable of the Tbit/s magnitudes more high data rate of compatible following appearance,
And to modulation system (such as phase-modulation PSK standards), pattern and the host-host protocol of ultra high-speed optical data without particular/special requirement, energy
The various standard optical signals of enough all-transparent encryption differing transmission protocols, it is that one kind is practical, confidentiality is high, easy and existing light net
The super high speed all-optical data enciphering/deciphering system of network fusion.
Claims (6)
1. the real-time encrypted system of super high speed all-optical data based on compound logic, it is characterised in that：Given birth to including the first random key
Into unit and compound logic ciphering unit；
The first random key generation unit includes the first pseudo-noise code generator and the first electrooptic modulator of series winding, its
In, the input of first electrooptic modulator is also associated with first laser device；
The compound logic ciphering unit includes the first fiber amplifier, the first optical filter and the second optical filter；Described
The input of one fiber amplifier is used to receive super high speed all-optical data to be encrypted and the first random key generation unit is defeated
The area of light random encryption key gone out, the output end of the first fiber amplifier is by the first highly nonlinear optical fiber respectively with described first
The input of optical filter and the second optical filter is connected, after the output coupling of first optical filter and the second optical filter
Output as real-time encrypted system.
2. the super high speed all-optical data real-time encrypted system according to claim 1 based on compound logic, it is characterised in that：
The first random key generation unit also includes the first tunable attenuator and the first optical delay line, and first tunable declines
The input for subtracting device is connected with the output end of first electrooptic modulator, the output end of the first tunable attenuator and described the
The input of one optical delay line is connected, and the output end of the first optical delay line is connected with first fiber amplifier；
The compound logic ciphering unit also includes the second tunable attenuator；Second tunable attenuator is used to receive and adjust
Super high speed all-optical data luminous power to be encrypted, and by the first light described in the super high speed all-optical data input to be encrypted after regulation
Fiber amplifier.
3. the super high speed all-optical data real-time encrypted system according to claim 2 based on compound logic, it is characterised in that：
The first laser device is the tunable pulse laser of 1550nm band wavelengths, and first electrooptic modulator is LiNbO3 electricity
Optical modulator, the first tunable attenuator and the second tunable attenuator are the tunable attenuator of luminous power, described first
The bandpass optical filtering device of tunable wave length centered on optical filter and the second optical filter, first highly nonlinear optical fiber are non-
Linear coefficient is higher than the special optical fiber of general single mode fiber.
4. the super high speed all-optical data real time decrypting system based on compound logic, it is characterised in that：Given birth to including the second random key
Into unit and compound logic real time decrypting unit；
The random key generation unit includes the clock synchronization unit, the second pseudo-noise code generator and the second electricity being sequentially connected
Optical modulator, wherein, the input of second electrooptic modulator is also associated with second laser；
The compound logic real time decrypting unit includes the first beam splitter, the second beam splitter, the second fiber amplifier, the 3rd optical fiber
Amplifier, first annular device, the second circulator and the 3rd optical filter；
First beam splitter is used to the area of light random decryption key of the second random key generation unit output being divided into two
Road, second beam splitter are used to super high speed all-optical ciphertext to be decrypted being divided into two-way：All the way area of light random decryption key and
Enter all the way after the coupling of super high speed all-optical ciphertext in second fiber amplifier, another way area of light random decryption key and another
Enter after the super high speed all-optical ciphertext coupling of road in the 3rd fiber amplifier；
Along the propagation path of light, multiple port orders of the first annular device and the second circulator are numbered respectively；Described
The output end of two fiber amplifiers is connected with a port of the first annular device, the output of the 3rd fiber amplifier
End is connected with a port of second circulator, second port of the first annular device and second circulator
Second port be connected by the second highly nonlinear optical fiber, the 3rd port of the first annular device and it is described second annular
3rd port of device is connected with the input of the 3rd optical filter simultaneously, and the output end of the 3rd optical filter is real
When decryption system output end.
5. the super high speed all-optical data real time decrypting system according to claim 4 based on compound logic, it is characterised in that：
The random key generation unit also includes the 3rd tunable attenuator and the second optical delay line, the 3rd tunable attenuator
Input be connected with the output end of second electrooptic modulator, the output end of the 3rd tunable attenuator is delayed with the second light
The input of line is connected, the output end of the second optical delay line respectively with second fiber amplifier and the 3rd fiber amplifier phase
Even；
The compound logic real time decrypting unit also includes the 4th tunable attenuator；4th tunable attenuator be used for receive and
The luminous power of super high speed all-optical ciphertext to be decrypted is adjusted, and by described in the super high speed all-optical ciphertext input to be encrypted after regulation
Second beam splitter.
6. the super high speed all-optical data real time decrypting system according to claim 5 based on compound logic, it is characterised in that：
The second laser is the tunable pulse laser of 1550nm band wavelengths, and second electrooptic modulator is LiNbO3 electricity
Optical modulator, the 3rd tunable attenuator and the 4th tunable attenuator are the tunable attenuator of luminous power, the described 3rd
The bandpass optical filtering device of tunable wave length centered on optical filter, second highly nonlinear optical fiber are nonlinear factor higher than general
The special optical fiber of logical single-mode fiber；The first annular device, the second circulator are 3 port one-way transmission fibre devices.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888053A (en) * | 2017-03-14 | 2017-06-23 | 中国科学院西安光学精密机械研究所 | Composite logic-based ultrahigh-speed all-optical data real-time encryption/decryption system and method |
| CN109413038A (en) * | 2018-09-19 | 2019-03-01 | 华中科技大学 | A kind of single channel encryption transmission method |
| CN109981174A (en) * | 2019-04-09 | 2019-07-05 | 中国科学院半导体研究所 | Light frequency-hopping system and transmitter based on optical circulator |
-
2017
- 2017-03-14 CN CN201720245272.7U patent/CN206698225U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888053A (en) * | 2017-03-14 | 2017-06-23 | 中国科学院西安光学精密机械研究所 | Composite logic-based ultrahigh-speed all-optical data real-time encryption/decryption system and method |
| CN106888053B (en) * | 2017-03-14 | 2023-05-02 | 中国科学院西安光学精密机械研究所 | Ultra-high-speed all-optical data real-time encryption/decryption system and method based on composite logic |
| CN109413038A (en) * | 2018-09-19 | 2019-03-01 | 华中科技大学 | A kind of single channel encryption transmission method |
| CN109981174A (en) * | 2019-04-09 | 2019-07-05 | 中国科学院半导体研究所 | Light frequency-hopping system and transmitter based on optical circulator |
| CN109981174B (en) * | 2019-04-09 | 2020-10-23 | 中国科学院半导体研究所 | Optical frequency hopping system and transmitter based on optical circulator |
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