CN117093183B - Single continuous laser phase reconstruction quantum random number generation system based on coherent detection - Google Patents
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Abstract
The invention relates to the technical field of quantum safety communication and discloses a single continuous laser phase reconstruction quantum random number generation system based on coherent detection. The invention utilizes the reconstructed phase fluctuation to realize the maximization of entropy, improves the quantity of extractable randomness in the original random bit sequence, and greatly improves the generation rate of the phase noise quantum random number; meanwhile, the result of coherent detection can be used for recovering classical noise such as laser intensity fluctuation, and the safety of the whole system can be improved through data processing.
Description
Technical Field
The invention relates to the technical field of quantum safety communication, in particular to a single continuous laser phase reconstruction quantum random number generation system based on coherent detection.
Background
Currently, quantum random number generators based on phase noise mainly have two structures: one is to introduce a small delay in one arm of the interferometer, the phase fluctuation is distributed in a small range, at this time, the interferometer output meets the statistical rule of Gaussian distribution, and the generated original random number also meets the Gaussian distribution; the other is to introduce a larger delay in the interferometer, which can lead to even distribution of phase fluctuations in the range where the interferometer output satisfies the statistics of the arcsine distribution, and the original random numbers of the generated pairs also satisfy the arcsine distribution. Whether gaussian or arcsine, the random bits are extracted randomly to produce a final uniform distribution, and in the process, nearly half of the random bits are lost.
Phase noise quantum random number generators based on coherent detection have been proposed for the problem of serious loss of random bits. The phase difference of two independent lasers is extracted through coherent detection, random numbers which are uniformly distributed can be obtained without post-processing, and most of random tests can be passed. However, this solution has drawbacks: (1) the interference of the individual lasers requires that the two lasers have identical frequency and spectral characteristics, which requires an additional temperature control module to ensure the stability of the laser wavelength. In practical applications, even through precise adjustment, the center frequencies of the two laser beams are difficult to perfectly align, so that the interference output also contains a beat signal, and needs to be removed in the data processing stage. (2) In order to obtain a uniformly distributed phase, the sampling rate is limited to a very low level, which directly limits the generation rate of the quantum random number, and finally only a rate of 1.2Mbps is obtained, which may not meet the requirements of practical applications. (3) The detected noise signal not only contains quantum noise but also contains partial classical noise, and the scheme only considers the quantum noise, and lacks the consideration of classical noise, so that the safety is required to be improved. Therefore, a solution is needed to solve the above-mentioned problems.
Disclosure of Invention
The invention provides a single continuous laser phase reconstruction quantum random number generation system based on coherent detection, which solves the problem of serious random bit loss of a phase noise quantum random number generator in randomness extraction.
In order to solve the technical problems, the invention provides a single continuous laser phase reconstruction quantum random number generation system based on coherent detection, which comprises a light source module, an interference module, a detection module and a data processing module; wherein,
the light source module is used for outputting an original light signal;
the interference module is used for splitting the original optical signal into a first optical signal and a second optical signal, delaying and splitting the first optical signal to obtain a first delayed optical signal and a second delayed optical signal, splitting the second optical signal to obtain a third optical signal and a fourth optical signal, shifting the fourth optical signal to obtain a phase-shifted optical signal, and respectively coupling and interfering the first delayed optical signal and the third optical signal, and the second delayed optical signal and the phase-shifted optical signal to obtain a first interference optical signal and a second interference optical signal;
the detection module is used for carrying out photoelectric conversion on the first interference optical signal and the second interference optical signal to obtain a first electric signal and a second electric signal with mutually orthogonal phases;
the data processing module is used for carrying out sampling quantization and combination on the first electric signal and the second electric signal, restoring the first electric signal and the second electric signal into one electric signal, and carrying out random extraction on the restored one electric signal to generate a quantum random number;
the interference module comprises a first beam splitter, a second beam splitter, a third beam splitter, a delay line, a phase shifter, a first coupler and a second coupler; wherein,
the first beam splitter is used for splitting the original optical signal to obtain a first optical signal and a second optical signal;
the delay line is used for delaying the first optical signal to obtain a delayed optical signal;
the second beam splitter is used for splitting the delayed optical signal to obtain a first delayed optical signal and a second delayed optical signal;
the third beam splitter is configured to split the second optical signal to obtain a third optical signal and a fourth optical signal;
the phase shifter is used for shifting the phase of the fourth optical signal to obtain a phase-shifted optical signal;
the first coupler is used for coupling and interfering the first delay optical signal and the third optical signal to obtain a first interference optical signal;
and the second coupler is used for coupling and interfering the second delay optical signal and the phase-shifting optical signal to obtain a second interference optical signal.
Further, the light source module comprises a laser and a temperature controller; the laser is used for outputting an original optical signal; the temperature controller is used for controlling the temperature of the laser and enabling the center wavelength of the laser and the output power of the original optical signal to be in a stable state.
Further, the temperature controller is also used for providing driving current for the laser.
Further, the laser is a DFB laser.
Further, the beam splitting ratio of the first beam splitter, the second beam splitter and the third beam splitter is 50:50.
Further, the detection module comprises a first detection module and a second detection module; wherein,
the first detection module is used for performing photoelectric conversion on the first interference optical signal to obtain a first electric signal;
the second detection module is used for performing photoelectric conversion on the second interference optical signal to obtain a second electric signal.
Further, the first detection module and the second detection module are balanced homodyne detectors.
Further, the data processing module comprises a sampling quantization module, a phase reconstruction module and a random extraction module; wherein,
the sampling quantization module is used for carrying out sampling quantization processing on the first electric signal and the second electric signal to obtain two paths of electric signals respectively having an in-phase component and a quadrature component;
the phase reconstruction module is used for combining one electric signal with the in-phase component as a real part and one electric signal with the quadrature component as an imaginary part to obtain a restored one electric signal represented by a complex vector;
the random extraction module is used for carrying out random extraction on the restored one-path electric signal represented by the complex vector through a normal diagonal matrix to obtain a quantum random number.
Further, the systems are connected by means of fiber optic coupling.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
the invention provides a single continuous laser phase reconstruction quantum random number generation system based on coherent detection, which generates quantum random numbers by adopting coherent detection reconstruction laser phase fluctuation, so that: (1) The reconstructed phase fluctuation obeys uniform distribution, the original random number obtained after sampling and quantization meets the uniform distribution, and the minimum entropy reaches the maximum in the randomness evaluation stage, so that the problem that random bits are lost in the randomness extraction process can be well solved; (2) The quadrature component obtained by coherent detection can be used for recovering the intensity fluctuation of the laser, the fluctuation belongs to the category of classical noise, and the classical noise can be removed through data processing; (3) The scheme adopts a single continuous laser, avoids the occurrence of beat frequency, and reduces the complexity of experimental operation and data processing; (4) The full randomness of the phase is realized by adopting a DFB laser with a large line width and an unequal arm interferometer, so that noise signals can be sampled at a high speed, and the random number generation rate is rapidly improved; (5) The design of the balance homodyne detector and the single laser improves the stability of the whole system and is beneficial to the miniaturization and integration of the system.
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In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a device diagram of a single continuous laser phase reconstruction quantum random number generation system based on coherent detection according to an embodiment of the present invention;
fig. 2 is a block diagram of a light source module according to an embodiment of the present invention;
FIG. 3 is a block diagram of an interference module provided in accordance with one embodiment of the present invention;
FIG. 4 is a block diagram of a detection module according to an embodiment of the present invention;
FIG. 5 is a block diagram of a data processing module according to one embodiment of the present invention;
FIG. 6 is a block diagram of another single continuous laser phase reconstruction quantum random number generation system based on coherent detection according to the present invention;
FIG. 7 is a graph showing the effect of different variances on phase distribution provided by the present invention;
FIG. 8 is a graph showing the effect of different distributions on entropy.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings and examples, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the step numbers used herein are for convenience of description only and are not limiting as to the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In one embodiment, as shown in fig. 1, the present invention provides a single continuous laser phase reconstruction quantum random number generating system based on coherent detection, which comprises a light source module 1, an interference module 2, a detection module 3 and a data processing module 4; wherein,
a light source module 1 for outputting an original light signal;
the interference module 2 is configured to split an original optical signal into a first optical signal and a second optical signal, delay the first optical signal and split the first optical signal to obtain a first delayed optical signal and a second delayed optical signal, split the second optical signal to obtain a third optical signal and a fourth optical signal, phase-shift the fourth optical signal to obtain a phase-shifted optical signal, and couple and interfere the first delayed optical signal and the third optical signal, and couple and interfere the second delayed optical signal and the phase-shifted optical signal to obtain a first interference optical signal and a second interference optical signal;
the detection module 3 is used for performing photoelectric conversion on the first interference optical signal and the second interference optical signal to obtain a first electric signal and a second electric signal with mutually orthogonal phases;
the data processing module 4 is used for carrying out sampling quantization and combination on the first electric signal and the second electric signal, restoring one electric signal, carrying out random extraction on the restored one electric signal, and generating a quantum random number;
according to the invention, the light source module 1 is used for emitting laser with stable power, the interference module 2 is used for converting laser phase change into light intensity change, the detection module 3 is used for converting light intensity change into voltage change, the data processing module 4 is used for restoring real phase fluctuation by using a sampled and quantized voltage value to generate a quantum random number, the maximum entropy is realized by the reconstructed phase fluctuation, and the random number is directly generated by using the phase, so that the accurate modeling analysis of the whole system is facilitated, the extractable randomness of an original random bit sequence is improved, and the generation rate of the phase noise quantum random number is greatly improved.
In a specific embodiment, as shown in fig. 2, the light source module 1 includes a temperature controller 11 and a laser 12; the laser 12 is used for outputting an original optical signal; the temperature controller 11 is used for controlling the temperature of the laser 12 and keeping the center wavelength of the laser 12 and the output power of the original optical signal in a stable state; a temperature controller 11 for providing a driving current to the laser 12;
in the system, the main function of the light source module 1 is to provide stable laser input for the whole system, a low-power continuous optical signal is generated by the laser 12, and the laser 12 is regulated and driven by the temperature controller 11, so that the wavelength of the laser is stable. The invention adopts a single continuous laser, avoids the occurrence of beat frequency, and reduces the complexity of experimental operation and data processing. In one embodiment, the laser 12 is a DFB laser, which has a stable single-mode output with a high side-to-side rejection ratio to achieve complete randomness of the phase, enabling the noise signal to be sampled at high speeds and the random number generation rate to be increased rapidly. Further, the laser 12 may also employ an ASE source with a shorter coherence time to further enhance the stability of the system and the rate of random number generation.
In a specific embodiment, as shown in fig. 3, the interference module 2 includes a first beam splitter 21, a delay line 22, a second beam splitter 23, a third beam splitter 24, a phase shifter 25, a first coupler 26, and a second coupler 27; wherein,
a first beam splitter 21 for splitting an original optical signal to obtain a first optical signal and a second optical signal;
a delay line 22 for delaying the first optical signal to obtain a delayed optical signal;
a second beam splitter 23 for splitting the delayed optical signal to obtain a first delayed optical signal and a second delayed optical signal;
a third beam splitter 24, configured to split the second optical signal to obtain a third optical signal and a fourth optical signal;
a phase shifter 25 for shifting the phase of the fourth optical signal to obtain a phase-shifted optical signal;
a first coupler 26, configured to couple and interfere the first delayed optical signal and the third optical signal to obtain a first interference optical signal;
a second coupler 27 for coupling and interfering the second delayed optical signal and the phase-shifted optical signal to obtain a second interference optical signal;
the main function of the interference module 2 in the system is to convert the phase difference change of laser light at different times into the light intensity change, and the beam splitting ratios of the first beam splitter 21, the second beam splitter 23 and the third beam splitter 24 are 50:50; namely, the three beam splitters have the same function and all split the input light beams in equal proportion; specifically, the first beam splitter 21 and the delay line 22 divide the original continuous laser into two paths of optical signals, and delay one path of the optical signals; the second beam splitter 23 and the third beam splitter 24 split one path of optical signals and one path of delayed optical signals obtained after the first beam splitting to obtain four paths of optical signals; the phase shifter 25 introduces pi/2 phase to one of the optical signals to obtain one phase-shifted optical signal; the first coupler 26 and the second coupler 27 mix four optical signals two by two so that two interference structures can output two optical signals containing phase changes. According to the invention, the random phase difference caused by single laser spontaneous emission is obtained through the unbalanced interferometer, and the phase difference is extracted from lasers at different moments through the interferometer, so that noise signals can be sampled at a high speed, and the random number generation rate is rapidly increased.
In a specific embodiment, as shown in fig. 4, the detection module 3 includes a first detection module 31 and a second detection module 32; wherein,
the first detection module 31 is configured to perform photoelectric conversion on the first interference optical signal to obtain a first electrical signal;
a second detection module 32, configured to perform photoelectric conversion on the second interference optical signal, so as to obtain a second electrical signal;
the first detection module 31 and the second detection module 32 in the detection module 3 respectively perform photoelectric conversion processing on the two paths of optical signals output by the interference module 2 to obtain two paths of electric signals respectively containing sin (theta) and cos (theta), and change the light intensity into voltage variation, so that the subsequent processing and analysis of the signals are facilitated. The module can effectively inhibit classical noise and has high receiving sensitivity. The invention restores the intensity fluctuation of the laser through the orthogonal component obtained by the dry detection, the intensity fluctuation is classical noise, and the safety of the whole system can be improved through data processing. In a specific embodiment, the first detection module 31 and the second detection module 32 are balanced homodyne detectors, and the design improves the stability of the whole system and is beneficial to miniaturization and integration of the system.
In a specific embodiment, as shown in fig. 5, the data processing module 4 includes a sample quantization module 41, a phase reconstruction module 42, and a random extraction module 43; wherein,
the sampling quantization module 41 is configured to perform sampling quantization processing on the first electrical signal and the second electrical signal, so as to obtain two paths of electrical signals respectively having an in-phase component and a quadrature component;
the phase reconstruction module 42 is configured to combine a path of electrical signal having an in-phase component as a real part and a path of electrical signal having a quadrature component as an imaginary part to obtain a path of electrical signal represented by a complex vector after being restored;
the random extraction module 43 is configured to perform random extraction on the restored one-path electrical signal represented by the complex vector through a normal-diagonal matrix to obtain a quantum random number;
the invention processes two paths of electric signals output by the detection module 3 through the data processing module 4, and is mainly used for reconstructing phase change and intensity fluctuation of a laser so as to generate an original quantum random number. Two paths of electric signals are subjected to sampling quantization to obtain two paths of mutually orthogonal electric signals I and Q about a phase theta, one path of electric signal I with an in-phase component is used as a real part, one path of electric signal Q with a quadrature component is used as an imaginary part for reduction, one path of electric signal Z which contains a real phase theta and is represented by a complex vector and is obtained after one path of electric signal combination is obtained, the amplitude of Z is the intensity fluctuation of laser, the phase angle of Z is the real phase fluctuation of the laser, the phase angle of Z is used for generating an original quantum random number, namely Toeplitz randomness extraction is adopted for generating a final practical quantum random number. According to the invention, the quantum random number is extracted through the reconstructed phase fluctuation, and the maximization of entropy is realized, so that the number of extractable randomness in the original random bit sequence is increased, and the generation rate of the phase noise quantum random number is greatly improved.
Another schematic structure of the system is shown in fig. 6, and the whole system is connected by optical fiber coupling. The working process of the system comprises the following steps: the output of the laser is sent into a polarization maintaining fiber beam splitter with a beam splitting ratio of 50:50, the beam splitter outputs two paths of optical signals, one path of optical signals is added with delay, the two paths of optical signals are respectively used as signal light and local oscillation light, the signal light and the local oscillation light, the signal light and pi/2 phase-shifted local oscillation light are interfered through two couplers, the interference is input into a pair of balanced homodyne detection structures, two quadrature components I and Q are output, a phase item theta is reconstructed according to the quadrature components, and the original random number is generated by sampling and quantization.
Under experimental setup of the scheme, the phase fluctuates Δφ 0 (t) the variance is sufficiently large, the phase term Δφ (t) is at [ -pi, pi]The method satisfies uniform distribution, generates random numbers according to the reconstructed phases, directly obtains uniformly distributed random bits, wherein the minimum entropy of the random bits is equal to the quantized bit number, random bits cannot be lost in random extraction, and the theoretically maximum random number generation rate is obtained. The scheme adopts a single laser source, thereby avoiding the control problem of two laser sources; generating random numbers by adopting phase truth values, wherein quantum entropy reaches the maximum value, and random bits are hardly lost in the randomness extraction process; the intensity fluctuation of the laser can be reduced; the whole system is easier to miniaturize and integrate and has more practicability; and the random number generation rate is improved by 2 times.
The classical phase noise quantum random number generator scheme uses a photodetector to detect interferometer output for generating quantum random numbers. Interferometer output light intensity I out And the phase fluctuation delta phi satisfies the following conditions: i out Oc sin (Δφ), the detector outputs a voltage V out Proportional to sin (Δφ). While the laser phase is a gaussian random variable, the variance has a large effect on the output distribution. The effect of different variances on the phase distribution is shown in fig. 7, which depicts the probability distribution of successive laser phases with different variances; wherein (a) is a phase profile: demonstrating a random phase probability distribution starting from 0.1 pi and starting at 0.2 pi spacing to 1.1 pi, mapping random phases to [ -pi, pi]In the interval, after the standard deviation is increased to 0.5 pi, the random phase of the Gaussian distribution converges the height to uniform distribution; (b) is an interference output profile: it has been demonstrated that when the random phase converges to a uniform distribution as the variance increases, it is constrained to sin to [ -1,1]During the interval, the interferometer output will satisfy the arcsine distribution, and the generated original random number will also satisfy the arcsine distribution; the reconstructed phase fluctuation is subject to uniform distribution, and the original random number obtained after sampling quantization is fullThe random bits are uniformly distributed, the minimum entropy reaches the maximum in the randomness evaluation stage, and the problem that the random bits are lost in the randomness extraction process can be well solved.
Under various statistical distributions, the uniform distribution does not contain any information, theoretically has the maximum entropy value, and has the highest extractable randomness. For gaussian and arcsine distributions, it is necessary to sacrifice part of the random bits since it is necessary to obtain a uniform distribution of true random numbers. To confirm this, simulation experiments were performed with minimum entropy as a criterion, and the effect of different distributions on entropy is shown in FIG. 8, where (a) is the case where the random phase Δφ variance is 0.09, detector output V out Is distributed in [ -1,1]Gaussian distribution of intervals; (b) (c) graph demonstrates that the random phase satisfies a uniform distribution at variance 22, where V out The arcsine distribution is satisfied; (a) And (c) two diagrams respectively represent two schemes of typical quantum random number generators, and (b) the scheme for reconstructing laser phase fluctuation and generating quantum random numbers by using the laser real phase fluctuation is provided by the invention.
The minimum entropy characterizes the number of extractable true randomness, the expression of which is:
H min (X)＝-log 2 (max{P(X＝x i )})
under the experimental condition of 5bits quantization, the minimum entropy H of three schemes min Respectively (a) 2.80bits/sample; (b) 4.98bits/sample; (c) 3.39bits/sample. Through the random extraction process, the random bits are lost by 44.0%, 0.4% and 32.2%, respectively. It can be seen that the uniform distribution has the greatest entropy and the lowest bit loss. Assuming a sampling rate of fsample/s, the resulting random bit generation rate is H f, which is proportional to the minimum entropy. Therefore, the scheme provided by the invention can realize maximum entropy and minimum bit loss, so that the generation rate of the quantum random number is improved, and therefore, the quantum random number generator designed by the invention has great advantages and potential in the aspects of practicality, stability and integration, and can be used for secret communication, scientific simulation, cryptography and other scenes. And the invention is used inThe simplicity of the processing technology and the practicability and reliability of the optical communication assembly make it easy to generate the credible random number for encryption, and meanwhile, from the perspective of photoelectric integration, the invention has the advantages of simple design, easy integration of used devices, and ensured integration, miniaturization and real-time future development trend of the quantum random number generator.
In summary, the problem of serious random bit loss in randomness extraction based on the phase noise quantum random number generator in the embodiment of the application is designed, a single continuous laser phase reconstruction quantum random number generation system based on coherent detection is designed, the random phase difference caused by single laser spontaneous radiation is obtained through an unbalanced interferometer, a pair of orthogonal components of phase noise is obtained through coherent detection, laser phase fluctuation is reconstructed according to the pair of orthogonal components, quantum random numbers are generated through real phase fluctuation of laser, and a technical scheme of uniformly distributed random numbers is obtained; the reconstructed phase fluctuation is utilized to realize the maximization of entropy, the number of extractable randomness in the original random bit sequence is increased, and the generation rate of the phase noise quantum random number is greatly increased; meanwhile, the result of coherent detection can be used for recovering classical noise such as laser intensity fluctuation, and the safety of the whole system can be improved through data processing.
In this specification, each embodiment is described in a progressive manner, and all the embodiments are directly the same or similar parts referring to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments. It should be noted that, any combination of the technical features of the foregoing embodiments may be used, and for brevity, all of the possible combinations of the technical features of the foregoing embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few preferred embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the invention. It should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and substitutions should also be considered to be within the scope of the present application. Therefore, the protection scope of the patent application is subject to the protection scope of the claims.
Claims (9)
1. The single continuous laser phase reconstruction quantum random number generation system based on coherent detection is characterized by comprising a light source module, an interference module, a detection module and a data processing module; wherein,
the light source module is used for outputting an original light signal;
the interference module is used for splitting the original optical signal into a first optical signal and a second optical signal, delaying and splitting the first optical signal to obtain a first delayed optical signal and a second delayed optical signal, splitting the second optical signal to obtain a third optical signal and a fourth optical signal, shifting the fourth optical signal to obtain a phase-shifted optical signal, and respectively coupling and interfering the first delayed optical signal and the third optical signal, and the second delayed optical signal and the phase-shifted optical signal to obtain a first interference optical signal and a second interference optical signal;
the detection module is used for carrying out photoelectric conversion on the first interference optical signal and the second interference optical signal to obtain a first electric signal and a second electric signal with mutually orthogonal phases;
the data processing module is used for carrying out sampling quantization and combination on the first electric signal and the second electric signal, restoring the first electric signal and the second electric signal into one electric signal, and carrying out random extraction on the restored one electric signal to generate a quantum random number;
the interference module comprises a first beam splitter, a second beam splitter, a third beam splitter, a delay line, a phase shifter, a first coupler and a second coupler; wherein,
the first beam splitter is used for splitting the original optical signal to obtain a first optical signal and a second optical signal;
the delay line is used for delaying the first optical signal to obtain a delayed optical signal;
the second beam splitter is used for splitting the delayed optical signal to obtain a first delayed optical signal and a second delayed optical signal;
the third beam splitter is configured to split the second optical signal to obtain a third optical signal and a fourth optical signal;
the phase shifter is used for shifting the phase of the fourth optical signal to obtain a phase-shifted optical signal;
the first coupler is used for coupling and interfering the first delay optical signal and the third optical signal to obtain a first interference optical signal;
and the second coupler is used for coupling and interfering the second delay optical signal and the phase-shifting optical signal to obtain a second interference optical signal.
2. The coherent detection based single continuous laser phase reconstruction quantum random number generation system of claim 1, wherein the light source module comprises a laser and a temperature controller; the laser is used for outputting an original optical signal; the temperature controller is used for controlling the temperature of the laser and enabling the center wavelength of the laser and the output power of the original optical signal to be in a stable state.
3. A single continuous laser phase reconstruction quantum random number generating system according to claim 2, wherein said temperature controller is further configured to provide a drive current to said laser.
4. A single continuous laser phase reconstruction quantum random number generating system based on coherent detection according to claim 2, wherein said laser is a DFB laser.
5. The system of claim 1, wherein the first, second and third beam splitters each have a 50:50 splitting ratio.
6. The system for generating the single continuous laser phase reconstruction quantum random number based on coherent detection according to claim 1, wherein the detection module comprises a first detection module and a second detection module; wherein,
the first detection module is used for performing photoelectric conversion on the first interference optical signal to obtain a first electric signal;
the second detection module is used for performing photoelectric conversion on the second interference optical signal to obtain a second electric signal.
7. The system of claim 6, wherein the first and second detection modules are balanced homodyne detectors.
8. The system for generating the single continuous laser phase reconstruction quantum random number based on coherent detection according to claim 1, wherein the data processing module comprises a sampling quantization module, a phase reconstruction module and a random extraction module; wherein,
the sampling quantization module is used for carrying out sampling quantization processing on the first electric signal and the second electric signal to obtain two paths of electric signals respectively having an in-phase component and a quadrature component;
the phase reconstruction module is used for combining one electric signal with the in-phase component as a real part and one electric signal with the quadrature component as an imaginary part to obtain a restored one electric signal represented by a complex vector;
the random extraction module is used for carrying out random extraction on the restored one-path electric signal represented by the complex vector through a normal diagonal matrix to obtain a quantum random number.
9. The system for generating the quantum random number by single continuous laser phase reconstruction based on coherent detection according to claim 1, wherein the system is connected by an optical fiber coupling mode.
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