CN101621287A - Real random code generating device based on chaos laser and generating method thereof - Google Patents
Real random code generating device based on chaos laser and generating method thereof Download PDFInfo
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Abstract
The invention relates to a real random code generating device based on chaos laser and a generating method thereof. Optical signals generated by a chaos laser generator I and a chaos laser generator II are respectively transmitted to a full-light analog-digital converter I and a full-light analog-digital converter II; optical signals generated by the full-light analog-digital converter I and the full-light analog-digital converter II are transmitted to a full-light exclusive-or logic gate to form a full-light real random code generating device. The generating method comprises the following steps: respectively transmitting continuous chaos laser signals generated by a chaos laser generator I and a chaos laser generator II to the full-light analog-digital converter I and the full-light analog-digital converter II so as to generate full-light random codes; and transmitting the full-light random codes generated by the full-light analog-digital converter I and the full-light analog-digital converter II to the full-light exclusive-or logic gate so as to generate the full-light real random codes. The bandwidth of the full-light real random codes can reach dozen GHz, and the full-light real random codes have wider frequency band, anti-electromagnetic interference, strong confidentiality, and the like and are used as scrambling signals in digital optical communication, thereby improving the anti-interference capability of a system.
Description
Technical field
The present invention relates to a kind of real random code generating device and method for generation thereof of chaotic laser light, comprise chaotic laser light generator I, all-light analog-digital converter I, chaotic laser light generator II, all-light analog-digital converter II and full light exclusive or logic gate also comprise the real random code method for generation of chaotic laser light.Specifically, be a kind of real random code device and method for generation thereof that utilizes chaotic laser light to realize, field such as be applied to military affairs, communication, remote sensing and maintain secrecy.
Background technology
Random code is widely used.For example, random sequence is as the measurement and control signal in distance measuring signal, communication test, cryptographic algorithm and the remote-control romote-sensing in the radar, scrambling and descramble signal in the digital communication, address code in the code division multiple access and spreading code etc.
Random code is divided into pseudo noise code and real random code, and pseudo noise code produces because its intrinsic regularity makes that it is not a random code truly.Real random code produces the variation based on some physical quantity, and its randomness depends on the randomness of physical quantity.The real random code generator of practical safety utilizes natural physical phenomenon to produce usually.The method of generation real random code has multiple, for example:
1) (CN12227679A US2003/0018674A1) can realize the generation of real random code, but because the data acquisition difficulty is big, and speed is low, and reasons such as not easy of integration, security protection make its application be subjected to limitation based on the radioactive nature at random of radioactive source.
2) the real random code generator (US2007/0127718A1 that realizes based on the quantum optices process, CN1558581A), this method realizes that by the randomness of light quantum real random code produces, the generation device of this real random code, especially follow-up single-photon detecting survey technology is comparatively complicated, be subjected to the restriction of sniffer, the speed of random number is usually at Mbit/s.
3) by the various circuit of structure produce random numbers (CN1420431A, CN101477450A, CN1588304A) or based on various pierce circuits realize randomizers (CN101162998A CN1573681A, CN10290566A).
Although the real random code generator has several different methods to produce, mostly based on the change at random of some physical quantity, its speed is low to be its main deficiency.Based on the random code system complex of quantum optices process generation, and not easy to operate.The real random code that produces based on circuit is subjected to the bandwidth constraints of circuit hardware, makes the code check of existing real random code generator based on electronic hardware all in the magnitude of Mbit/s.
In the technical scheme of existing real random code generator, utilize chaos circuit or other at random physical phenomenon can produce real random code, but all be to adopt circuit to carry out the collection and the coding of data in the production process, approached the processing upper limit of electronic device based on the electric treatment system of Digital Electronic Technique, further the difficulty of the speed and capacity of raising device processes information is increasing, utilize electronic device to be difficult to produce real random code at a high speed, can't satisfy the demand in fields such as high-capacity and high-speed communication.
In order to address this problem, closely-related a kind of with the present invention based on the real random code generator of chaotic laser light and the method (CN101079615A) of generation random code thereof, utilize semiconductor laser can produce the chaotic laser light of number GHz bandwidth under proper condition, proposition utilizes chaotic laser light to realize the generation of real random code, to become the signal of telecommunication by photodetector, handle obtaining real random code output.In December, 2008, the pure husband in interior field of Japan has reported and has adopted and relevant patent (CN101079615A)) identical principle realized the real random code of 1.7Gbit/s.(″Fast?physical?random?bit?generation?withchaotic?semiconductor?lasers，″Nature?Photonics，vol.2，no.12，pp.728-732，2008)。But this method has only been utilized broadband chaotic laser light generator, also needs to carry out opto-electronic conversion, and its analog-to-digital conversion and gate device all adopt electronic device, are subjected to the influence of electronic device bandwidth bottleneck, is difficult to produce the more speed random number.
Summary of the invention
The problem that the present invention proposes is based on the real random code generating device of chaotic laser light, realizes the real random code of full light, in order to the problem that transmission rate is low and application is limited to that solves the real random code that has electronic hardware now.Its objective is provides a kind of real random code generating device and method for generation thereof based on chaotic laser light.
A kind of real random code generating device based on chaotic laser light of the present invention comprises the chaotic laser light generator, all-light analog-digital converter and full light exclusive or logic gate, and the optical signal transmission that its formation is to be sent by chaotic laser light generator I is to all-light analog-digital converter I; The optical signal transmission that chaotic laser light generator II sends is to all-light analog-digital converter II, and the optical signal transmission that all-light analog-digital converter I and all-light analog-digital converter II send is to the real random code generating device of full light exclusive or logic gate formation based on chaotic laser light.
The light signal that the technical scheme of the above-mentioned generating means of the present invention described chaotic laser light generator I and chaotic laser light generator II send is a chaotic laser light; The light signal that described all-light analog-digital converter I and all-light analog-digital converter II send is full light random code; Described optical signal transmission is Optical Fiber Transmission, free space transmission or optical fiber and free space transmission; Described chaotic laser light generator I and chaotic laser light generator II are semiconductor laser or fiber laser; Described semiconductor laser or fiber laser are that light feedback semiconductor laser, light beam are gone into semiconductor laser or fiber laser.
The present invention is a kind of to be used for the method for generation of above-mentioned real random code generating device based on chaotic laser light, comprise the method that takes place based on the chaotic laser light real random code, this method is that chaotic laser light generator I sends continuous chaotic laser light signal and is transferred to all-light analog-digital converter I and produces full light random code; Chaotic laser light generator II sends continuous chaotic laser light signal and is transferred to all-light analog-digital converter II and produces full light random code, the full light random code that all-light analog-digital converter I and all-light analog-digital converter II produce is transferred to full light exclusive or logic gate, and full light real random code takes place full light exclusive or logic gate.
The technical scheme of the above-mentioned method for generation of the present invention described chaotic laser light generator I and chaotic laser light generator II are two mutual incoherent chaotic laser lights; Described chaotic laser light generator I is through sampling and the quantification of all-light analog-digital converter I realization to chaotic laser light, the full light random code of output " 1 " or " 0 "; Described chaotic laser light generator II is through sampling and the quantification of all-light analog-digital converter II realization to chaotic laser light, the full light random code of output " 1 " or " 0 "; The full light random code of described all-light analog-digital converter I and all-light analog-digital converter II output is input to full light exclusive or logic gate and carries out the computing of full light XOR, and full light XOR computing increases the randomness of system's random code, and full light real random code takes place.
A kind of real random code generating device and method for generation thereof that the present invention proposes based on chaotic laser light, compare with technology formerly and to have following advantage and good effect:
The generator that the present invention utilizes the chaotic laser light signal to produce as real random code, the chaotic laser light generator of Cai Yonging wherein, all-light analog-digital converter and full light exclusive or logic gate are full optical device, the chaotic laser light generator adopts semiconductor laser or fiber laser to realize the output of chaotic laser light, the chaotic laser light of output has smooth continuous frequency spectrum, its bandwidth can reach tens GHz, it is output as continuous random signal, thereby, improve three scalar products at least with the real random code code check that adopts circuit to produce relatively by chaotic laser light being sampled and quantizing to obtain Gbit/s real random code at a high speed.Adopt all-light analog-digital converter spare, continuous chaotic laser light is transformed into digital optical signal by sampling and quantification, by adopting of the XOR computing of full light exclusive or logic gate to two ways of digital signals, obtain full light real random code, " electronic bottleneck " that the analog to digital converter of full light and full light exclusive or logic gate adopt full optical processing information technology to avoid the electrical information of Digital Electronic Technique to handle, the real random code that produces with the signal of telecommunication has transmission capacity greatly and the good characteristic of wide bandwidth relatively.Carry out the transmission of light signal by optical fiber or free space between the full light real random code generator, make full light random code device have advantages such as utmost point broadband, anti-electromagnetic interference, strong security.Full light real random code as scrambling and descramble signal, improves the antijamming capability of system in digital optical, be applied in the light spread spectrum communication as address code and spreading code, makes that the light spread spectrum communication has the frequency height, speed is fast, information processing capacity is big.
Full light real random code based on chaotic laser light utilizes the optical information processing technology to finish the forwarding and the processing of light signal, the performance electrical information is handled beyond challenge advantage, along with full optical device development and maturation progressively, full light real random code also will be in message areas such as optical communication, optical processing performance important role.
Description of drawings
Fig. 1 is the full light real random code generating device structural representation based on chaotic laser light of the present invention;
Fig. 2 is a concrete structure schematic diagram of the full light real random code generating device based on chaotic laser light of the present invention;
Fig. 3 is another concrete structure schematic diagram of the full light real random code generating device based on chaotic laser light of the present invention.
Among the figure: 1: chaotic laser light generator I; 2: all-light analog-digital converter I; 3: chaotic laser light generator II; 4: all-light analog-digital converter II; 5: full light exclusive or logic gate; 6: chaotic laser light generator A; 6a: semiconductor laser; 6b: optical isolator; 6c: coupler; 6d: image intensifer; 6e: optical isolator; 6f: coupler; 6g: Polarization Controller; 7: all-light analog-digital converter A; 7a: optical sampler; 7b: light quantization device; 8: chaotic laser light generator B; 8a: semiconductor laser; 8b: circulator; 8c: isolator; 8d: coupler; 8e: optical attenuator; 8f: Polarization Controller; 8g: optical isolator; 9: all-light analog-digital converter B; 9a: optical sampler; 9b: light quantization device; 10: full light exclusive or logic gate A; 11: chaotic laser light generator C; 11a: semiconductor laser; 11b: collimating lens; 11c: beam splitter; 11d: optical attenuator; 11e: Polarization Controller; 11f: semiconductor laser; 12: all-light analog-digital converter C; 12a: optical sampler; 12b: light quantization device; 13: chaotic laser light generator D; 13a: semiconductor laser; 13b: collimating lens; 13c: beam splitter; 13d: optical attenuator; 13e: speculum; 14: all-light analog-digital converter D; 14a: optical sampler; 14b: light quantization device; 15: full light exclusive or logic gate B.
Embodiment
The real random code generator that is used for producing full light at chaotic laser light, be used to produce the chaotic laser light of random code, can be injected into semiconductor laser by outer light feedback, electro-optical feedback, light and realize, also can realize that chaotic laser light output produces by monocycle or dicyclo fiber laser.
A kind of real random code generating device and method for generation thereof based on chaotic laser light that the present invention proposes is described in further detail with embodiment below in conjunction with accompanying drawing, those skilled in the art is after having read embodiment, can understand and implement the present invention, its described beneficial effect also can obtain embodying by embodiment.
As Fig. 2 is a concrete structure schematic diagram of the full light real random code of the present invention generator.Embodiment is as follows:
Full light real random code generator based on chaotic laser light comprises chaotic laser light generator A6, all-light analog-digital converter A7, and chaos swashs generator B8, all-light analog-digital converter B9, full light exclusive or logic gate A10.
Wherein, chaotic laser light generator A6, by semiconductor laser 6a, optical isolator 6b, coupler 6c, image intensifer 6d, optical isolator 6e, coupler 6f and Polarization Controller 6g constitute, and connect by optical fiber successively between them.Wherein acting as of optical isolator 6b stops light to feed back to semiconductor laser 6a, and acting as of coupler 6c imports to semiconductor laser in the fiber optic loop.The effect of image intensifer 6d provides gain modulation, the acting as of optical isolator 6e makes the laser unidirectional operation in the fiber optic loop, the interior polarization state of fiber optic loop is regulated in acting as of Polarization Controller 6g, and coupler 6f act as the light in the fiber optic loop is outputed to all-light analog-digital converter A7.Coupler 6f is connected by optical fiber with all-light analog-digital converter A7.
All-light analog-digital converter A7, by optical sampler 7a, light quantization device 7b.And connect successively by optical fiber between them.Optical sampler 7a act as continuous chaotic laser light is sampled, and makes it become pulse signal.Light quantization device 7b quantizes the signal through over-sampling or encodes, and makes it be output as digital optical signal, and the sequence of output is full light random code.
Chaotic laser light generator B8, by semiconductor laser 8a, circulator 8b, isolator 8c, coupler 8d, optical attenuator 8e, Polarization Controller 8f constitutes, and connects by optical fiber successively between them, and the light that act as semiconductor laser 8a output of circulator 8b imports in the fiber optic loop, after the operation of the single file in fiber optic loop, import in the semiconductor laser again.The acting as of isolator 8c makes the laser unidirectional operation in the fiber optic loop, acting as of coupler 8d goes out fiber optic loop with a part of photoconduction in the fiber optic loop, the light intensity that semiconductor laser 8a is returned in the chamber internal feedback is regulated in acting as of optical attenuator 8e, and Polarization Controller 8f act as to regulating polarized state of light in the fiber optic loop.Coupler 8d is connected by optical fiber with optical isolator 8g.Optical isolator 8g is connected by optical fiber with all-light analog-digital converter B9.
All-light analog-digital converter B9, by optical sampler 9a, light quantization device 9b constitutes, and connects by optical fiber successively between them.Optical sampler 9a act as continuous chaotic laser light is sampled, and makes it become pulse signal.Light quantization device 9b quantizes the signal through over-sampling or encodes, and makes it be output as digital optical signal, and the sequence of output is full light random code.
All-light analog-digital converter A7 is connected with full light exclusive or logic gate A10 by optical fiber with all-light analog-digital converter B9.The effect of light exclusive or logic gate A10 is that the random code of the full light of all-light analog-digital converter A7 and all-light analog-digital converter B9 output is carried out the XOR computing, the randomness of the random code of the full light of increase all-light analog-digital converter A7 and all-light analog-digital converter B9 output obtains full light real random code.
The present invention adopts the method for generation of above-mentioned real random code generating device based on chaotic laser light, be that semiconductor laser generation chaotic laser light is realized full light real random code output, chaotic laser light generator A6 is by the light of semiconductor laser 6a output, behind optical isolator 6b, enter into by image intensifer 6d by coupler 6c, optical isolator 6e, coupler 6f, in the fiber optic loop that Polarization Controller 6g forms, modulation by fiber optic loop, at the continuous chaotic laser light of 6f coupler port output, the output of continuous chaotic laser light is by regulating the pumping current of semiconductor laser 6a, the pumping current of image intensifer 6d, the adjusting of Polarization Controller 6g realizes.Chaotic laser light generator A6 is connected to all-light analog-digital converter A7 by optical fiber.
All-light analog-digital converter A7 exports full light random code by after the light of chaotic laser light generator A6 output is sampled and quantizing.
Chaotic laser light generator B8, light by semiconductor laser 8a output enters fiber optic loop by circulator 8b, light enters coupler 8d, optical attenuator 8e and Polarization Controller 8f by isolator 8c, enter semiconductor laser 8a by optical circulator at last, by regulating Polarization Controller 8f and optical attenuator 8e, the final chaotic laser light of realizing is exported, and the output of chaotic laser light is by realizing by regulating semiconductor laser 8a pumping current, Polarization Controller 8f and optical attenuator 8e.Enter all-light analog-digital converter B9 by optical isolator 8g.
After all-light analog-digital converter B9 samples to the chaotic laser light of the output of chaotic laser light generator and quantizes, export full light random code.
The full light random code of all-light analog-digital converter A7 and all-light analog-digital converter B9 output is by full light exclusive or logic gate A10, finish the digital signal of all-light analog-digital converter A7 and all-light analog-digital converter B9 output is carried out XOR, the purpose of doing like this is for the probability of realizing digital signal appearance " 1 " sign indicating number or " 0 " sign indicating number equates, increases the randomness of random code.Full light exclusive or logic gate B15 can pass through semiconductor optical amplifier, full light fiber optic loop, the realization of all-optical interference instrument, realizes that finally the full light exclusive or logic gate of full light real random code A10 output is the real random code of the full light of system's output.
Fig. 3 is another concrete structure schematic diagram of the full light real random code of the present invention generator.Embodiment is as follows:
Based on the full light real random code generator of chaotic laser light, by chaotic laser light generator C11, all-light analog-digital converter C12, chaotic laser light generator D13, all-light analog-digital converter D14, full light exclusive or logic gate B15 constitutes.
Wherein, chaotic laser light generator C11, by semiconductor laser 11a, collimating lens 11b, beam splitter 11c, optical attenuator 11d, Polarization Controller 11e and semiconductor laser 11f constitute, and free-space optical transmission connects successively between each composed component.The effect of collimating lens 11b is that the light that semiconductor laser 11a exports is collimated, and becomes directional light.To be divided into two bundles a branch of as exporting light for the light with semiconductor laser 11a output of acting as of beam splitter 11c, a branch of light is injected into semiconductor laser 11f, optical attenuator 11d act as the power of regulating the light be injected into semiconductor laser 11f, and the acting as of Polarization Controller 11e regulated and injected polarized state of light and make the polarized state of light that feeds back to semiconductor laser 11f be complementary.
All-light analog-digital converter C12 is made of optical sampler 12a and light quantization device 12b, and carries out optical signal transmission between each composed component connect successively under the free space state.All-light analog-digital converter c12 exports full light random code by after the light of chaotic laser light generator c11 output is sampled and quantizing.Optical sampler 12a act as continuous chaotic laser light is sampled, and makes it become pulse signal.Light quantization device 12b quantizes the signal through over-sampling or encodes, and makes it be output as digital optical signal, and the sequence of output is full light random code.
Chaos swashs generator D13, be made of semiconductor laser 13a, collimating lens 13b, beam splitter 13c, optical attenuator 13d and speculum 13e, and free-space optical transmission connects successively between them.The effect of collimating lens 13b is that the light that semiconductor laser 13a exports is collimated, and becomes directional light.To be divided into two bundles a branch of as exporting light for the light with semiconductor laser 13a output of acting as of beam splitter 13c, a branch of speculum 13e that incides, optical attenuator 11d act as the power of regulating the light be injected into semiconductor laser 13a, and speculum 13e act as incident light reflected back semiconductor laser 13a.Chaotic laser light generator D13 is connected to all-light analog-digital converter D14 by free-space optical transmission.
All-light analog-digital converter D14 is made of optical sampler 14a and light quantization device 14b.And connect successively by free-space optical transmission between them.All-light analog-digital converter D14 exports full light random code by after the light of chaotic laser light generator D13 output is sampled and quantizing.Optical sampler 14a act as continuous chaotic laser light is sampled, and makes it become pulse signal.Light quantization device 14b quantizes the signal through over-sampling or encodes, and makes it be output as digital optical signal, and the sequence of output is full light random code.
All-light analog-digital converter C12 is connected with full light exclusive or logic gate B15 by free-space optical transmission with all-light analog-digital converter D14, full light exclusive or logic gate B15 finishes the digital signal of all-light analog-digital converter C12 and all-light analog-digital converter D14 output is carried out XOR, the purpose of doing like this is for the probability of realizing digital signal appearance " 1 " sign indicating number or " 0 " sign indicating number equates, increases the randomness of random code.Full light exclusive or logic gate A10 output is the real random code of the full light of system's output.Full light exclusive or logic gate B15 can pass through semiconductor optical amplifier, full light fiber optic loop, the realization of all-optical interference instrument, finally realizes full light real random code.
The present invention adopts the method for generation of above-mentioned real random code generating device based on chaotic laser light,
Chaotic laser light generator C11 is by the light of semiconductor laser 11a output, behind collimating lens 11b collimation, 11c is divided into two bundles by the light beam device, one the tunnel as the chaotic laser light output channel, leads up to behind the optical attenuator 11d, by Polarization Controller 11e, after being injected into semiconductor laser 11f, reflected back semiconductor laser 11a, optical attenuator 11d are used for adjusting the feedback light intensity, finally realize chaotic laser light output.
All-light analog-digital converter C12 exports full light random code by the light of chaotic laser light generator C11 output being sampled and quantizing.
Chaotic laser light generator D13 is by the light of semiconductor laser 13a output, behind collimating lens 13b collimation, 13c is divided into two bundles by the light beam device, one the tunnel as the chaotic laser light output channel, lead up to behind the optical attenuator 13d, by speculum 13e reflected back semiconductor laser 13a, optical attenuator 13d is used for adjusting the feedback light intensity, finally realizes chaotic laser light output.
All-light analog-digital converter D14 samples to the chaotic laser light of chaotic laser light generator D13 output and quantizes, and realizes full light random code, and the random code of all-light analog-digital converter C12 and all-light analog-digital converter D14 output is passed through full light exclusive or logic gate B15,
Full light exclusive or logic gate B15 finish to the full light of all-light analog-digital converter 12 and all-light analog-digital converter D14 output immediately sign indicating number carry out XOR, the purpose of doing like this is exactly in order to realize that the probability that " 1 " or " 0 " sign indicating number appears in digital signal equates.Full light exclusive or logic gate B15 can pass through semiconductor optical amplifier, full light fiber optic loop, the realization of all-optical interference instrument, realizes that finally the full light exclusive or logic gate of full light real random code B15 output is the real random code of the full light of system's output.
Claims (11)
1. real random code generating device based on chaotic laser light, include the chaotic laser light generator, all-light analog-digital converter and full light exclusive or logic gate, the optical signal transmission that it is characterized in that being sent by chaotic laser light generator I (1) is to all-light analog-digital converter I (2); The optical signal transmission that chaotic laser light powder producer II (3) sends is to all-light analog-digital converter II (4), and the optical signal transmission that all-light analog-digital converter I (2) and all-light analog-digital converter II (4) send is to the real random code generating device of full light exclusive or logic gate (5) formation based on chaotic laser light.
2. the described a kind of real random code generating device based on chaotic laser light of claim 1 is characterized in that the light signal that chaotic laser light generator I (1) and chaotic laser light generator II (3) send is a chaotic laser light.
3. the described a kind of real random code generating device based on chaotic laser light of claim 1 is characterized in that the light signal that all-light analog-digital converter I (2) and all-light analog-digital converter II (4) send is full light random code.
4. claim 1,2 or 3 described a kind of real random code generating devices based on chaotic laser light is characterized in that optical signal transmission is Optical Fiber Transmission, free space transmission or optical fiber and free space transmission.
5. claim 1 or 2 described a kind of real random code generating devices based on chaotic laser light is characterized in that chaotic laser light generator I (1) and chaotic laser light generator II (3) are semiconductor laser or fiber laser.
6. the described a kind of real random code generating device based on chaotic laser light of claim 5 is characterized in that semiconductor laser or fiber laser are that light feedback semiconductor laser, light beam are gone into semiconductor laser or fiber laser.
7. method for generation that is used for the described real random code generating device based on chaotic laser light of claim 1, comprise the method that takes place based on the chaotic laser light real random code, it is characterized in that chaotic laser light generator I (1) sends continuous chaotic laser light signal and is transferred to the full light random code of all-light analog-digital converter I (2) generation; Chaotic laser light generator II (3) sends continuous chaotic laser light signal and is transferred to the full light random code of all-light analog-digital converter II (4) generation, the full light random code that all-light analog-digital converter I (2) and all-light analog-digital converter II (4) produce is transferred to full light exclusive or logic gate (5), and full light real random code takes place full light exclusive or logic gate (5).
8. the method for generation of the described a kind of real random code generating device based on chaotic laser light of claim 7 is characterized in that chaotic laser light generator I (1) and chaotic laser light generator II (3) are two mutual incoherent chaotic laser lights.
9. the method for generation of the described a kind of real random code generating device based on chaotic laser light of claim 7, it is characterized in that chaotic laser light generator I (1) is through sampling and the quantification of all-light analog-digital converter I (2) realization to chaotic laser light, the full light random code of output " 1 " or " 0 ".
10. the method for generation of the described a kind of real random code generating device based on chaotic laser light of claim 7, it is characterized in that chaotic laser light generator II (3) is through sampling and the quantification of all-light analog-digital converter II (4) realization to chaotic laser light, the full light random code of output " 1 " or " 0 ".
11. the method for generation of the described a kind of real random code generating device based on chaotic laser light of claim 7, the full light random code that it is characterized in that all-light analog-digital converter I (2) and all-light analog-digital converter II (4) output, be input to full light exclusive or logic gate (5) and carry out the computing of full light XOR, full light XOR computing increases the randomness of system's random code, and full light real random code takes place.
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