WO2020133612A1

WO2020133612A1 - Parallel all-optical digital chaos data selector

Info

Publication number: WO2020133612A1
Application number: PCT/CN2019/072303
Authority: WO
Inventors: 钟东洲; 杨广泽; 郁勤; 曾能; 杨华
Original assignee: 五邑大学
Priority date: 2018-12-27
Filing date: 2019-01-18
Publication date: 2020-07-02
Also published as: CN109521624A; CN109521624B

Abstract

The present invention discloses a parallel all-optical digital chaos data selector, comprising an electronic data selector, a sample grating distributed Bragg reflection laser, an optical coupler, a vertical cavity surface emitting laser, an opto-isolator, an optical beam splitter, a polarization beam splitter, a variable attenuator, a photoelectric transducer, a low pass filter, an electric amplifier, a Faraday rotator, and a half wave plate. The present invention can realize the selected output of dual-channel signals with digital chaos by controlling the input of signals for channel selection, can achieve the data selection function on signals with parallel all-optical digital chaos, and can be applied into all-optical chaos triggers and all-optical chaos counters.

Description

A parallel all-optical digital chaotic data selector

Technical field

The invention relates to electronic and photonic equipment, in particular to a parallel all-optical digital chaotic data selector.

Background technique

Optical injection or optical feedback vertical cavity surface emitting lasers (VCSELs) can generate high-dimensional, large-bandwidth chaotic dynamic behavior. By using the rich patterns embedded in the laser chaotic system, basic or more complex logical functions can be performed. The polarization bistable state injected into the vertical cavity surface emitting laser provides the possibility for the VCSEL chaotic system to expand into a new application-chaos calculation. At present, its chaotic dynamic behavior can be widely applied to "chaotic radar ranging", "chaotic storage pool", "chaotic secure communication", "chaotic neural network" and other fields. At this stage, some researchers have realized the use of different VCSEL laser chaos system device principles to perform basic chaos logic "AND", "OR", and "NO" operations; the use of drive-response chaotic laser system has also implemented some basic logic operations , Such as "same OR gate", "NOR gate", etc. However, the above-mentioned chaotic logic operations are based on various mechanisms (such as polarization conversion, chaotic synchronization, and polarization bistable), which only implement basic chaotic logic operations, and it is necessary to explore some more complex combined chaotic logic operations.

In the signal exchange and signal processing of all-optical chaotic networks, the complex combination of all-optical chaotic logic operations, such as all-optical chaotic data selectors and all-optical chaotic decoders, plays an important role. The all-optical chaotic data selector is used in conjunction with other basic all-optical chaotic logic devices to achieve a more complex combination of all-optical chaotic logic functions and all-optical timing chaotic logic functions, such as all-optical chaotic triggers, all-optical chaotic counters, etc. , This is conducive to promoting the practical process of all-optical chaotic secure communication network system. However, the all-optical chaotic data selector has received little attention. There have been no reports so far. It is necessary to explore a new mechanism and new optical path to realize the all-optical chaotic data selector.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a parallel all-optical digital chaotic data selector.

The object of the present invention is achieved by the following technical solution: a parallel all-optical digital chaotic data selector, including a first electrical amplifier, a first low-pass filter, a first photoelectric converter, a second electrical amplifier, a second Low-pass filter, second photoelectric converter, third electric amplifier, third low-pass filter, third photoelectric converter, electronic data selector, sampling grating distributed Bragg reflector laser, first optical coupler, second light Coupler, vertical cavity surface emitting laser;

A first optical isolator, a first optical beam splitter, a second optical beam splitter, a first variable attenuator, and a second variable are provided between the sampling grating distributed Bragg reflector laser and the first optical coupler Attenuator, third variable attenuator, third optical beam splitter, fourth optical beam splitter, fifth optical beam splitter; there is a first polarization between the first optical coupler and the second optical coupler A beam splitter, a first Faraday rotator, and a first half-wave plate; a sixth optical beam splitter, a fourth variable attenuator, and a second Faraday rotation between the second optical coupler and the vertical cavity surface emitting laser A second optical half-wave plate and a fifth variable attenuator; a second optical isolator and a second polarization beam splitter are further arranged behind the vertical cavity surface emitting laser.

Wherein, the first optical isolator is disposed between the sampling grating distributed Bragg reflector laser and the first optical beam splitter, and the sampling grating distributed Bragg reflector laser transmits the generated laser light to the first optical beam splitter through the first optical isolator .

One output end of the first optical beam splitter transmits laser light to the second optical beam splitter; the other output end of the first optical beam splitter transmits laser light to the fifth optical beam splitter through a third variable attenuator;

One output end of the second optical beam splitter transmits laser light to the fourth optical beam splitter through the second variable attenuator, and the other output end of the second optical beam splitter transmits laser light to the fourth variable beam attenuator to Third beam splitter;

One output end of the third optical beam splitter transmits laser light to the second photoelectric converter, and the output end of the second photoelectric converter is connected to the electronic data selector through the second low-pass filter and the second electric amplifier in sequence; The other output end of the three-beam splitter transmits laser light to the first optical coupler;

One output end of the fourth optical beam splitter transmits laser light to the first photoelectric converter, and the output end of the first photoelectric converter is connected to the electronic data selector through the first low-pass filter, the first electric amplifier in sequence; The other output end of the four-beam splitter transmits laser light to the first optical coupler;

One output end of the fifth optical beam splitter transmits laser light to the third photoelectric converter, and the output end of the third photoelectric converter is connected to the electronic data selector through a third low-pass filter, a third electric amplifier in sequence; The other output end of the five-beam splitter transmits laser light to the first optical coupler;

The output end of the electronic data selector is connected to a sampling grating distributed Bragg reflection laser.

The output end of the first optical coupler transmits laser light to the first polarization beam splitter, one output end of the first polarization beam splitter transmits laser light to the second optical coupler; another type of output of the first polarization beam splitter The laser beam is transmitted to the second optical coupler through the first Faraday rotator and the first half-wave plate.

The output end of the second optical coupler transmits laser light to the sixth optical beam splitter, and one output end of the sixth optical beam splitter transmits laser light to the vertical cavity surface emitting laser via the fourth variable attenuator; the sixth beam splitter The other output end of the device transmits laser light to the surface of the vertical cavity through the second Faraday rotator, the second half-wave plate, and the fifth variable attenuator.

The output end of the vertical cavity surface emitting laser transmits laser light to the second polarization beam splitter through the second optical isolator, and the second polarization beam splitter performs polarization output.

The beneficial effects of the present invention are: the present invention can realize the selection output of the dual-channel digital chaotic signal by controlling the input of the selection channel signal, complete the data selection function for the parallel all-optical digital chaotic signal, and can be popularized and applied to the all-optical chaotic trigger, All-optical chaos counter.

BRIEF DESCRIPTION

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a chaotic geographic map of a parallel all-optical digital chaotic data selector;

Figure 3 shows the evolution of the bistable state of the two polarization components with E _inj under the frequency detuning of -40 GHz and 40 GHz;

FIG. 4 is the relationship between the frequency detuning between the sampling grating distributed Bragg reflector laser 11 and the vertical cavity surface emitting laser 14 and the amplitude of the injected light field;

Figure 5 shows the relationship between the input signal of the parallel all-optical digital chaotic data selector and the logic control signal;

Figure 6 is the parallel all-optical digital chaotic data selector x polarization output amplitude and the digital signal Y ₁ output after threshold judgment;

7 is a parallel all-optical digital chaotic data selector y polarization output amplitude and digital signal Y ₂ output after threshold judgment;

In the figure, 1-the first electrical amplifier, 2-the first low-pass filter, 3-the first photoelectric converter, 4-the second electric amplifier, 5-the second low-pass filter, 6-the second photoelectric converter , 7-third electrical amplifier, 8-third low-pass filter, 9-third optical-to-electrical converter, 10-electronic data selector, 11-sampling grating distributed Bragg reflector laser, 12-first optical coupler, 13 -Second optical coupler, 14-vertical cavity surface emitting laser, 15-first optical isolator, 16-first optical beam splitter, 17-second optical beam splitter, 18-first variable attenuator, 19-second variable attenuator, 20-third variable attenuator, 21-third optical beam splitter, 22-fourth optical beam splitter, 23-fifth optical beam splitter, 24-first polarization Beam splitter, 25-first Faraday rotator, 26-first half-wave plate, 27-sixth optical beam splitter, 28-fourth variable attenuator, 29-second Faraday rotator, 30-second Half-wave plate, 31-fifth variable attenuator, 32-second optical isolator, 33-second polarization beam splitter.

detailed description

The technical solution of the present invention is further described in detail below with reference to the drawings, but the protection scope of the present invention is not limited to the following.

As shown in FIG. 1, a parallel all-optical digital chaotic data selector includes a first electrical amplifier 1, a first low-pass filter 2, a first photoelectric converter 3, a second electrical amplifier 4, a second low-pass filter 5, second photoelectric converter 6, third electric amplifier 7, third low-pass filter 8, third photoelectric converter 9, electronic data selector 10, sampling grating distributed Bragg reflection laser 11, first optical coupler 12. Second optical coupler 13, vertical cavity surface emitting laser 14;

A first optical isolator 15, a first optical beam splitter 16, a second optical beam splitter 17, and a first variable attenuator are provided between the sampling grating distributed Bragg reflector laser 11 and the first optical coupler 12 18. Second variable attenuator 19, third variable attenuator 20, third optical beam splitter 21, fourth optical beam splitter 22, fifth optical beam splitter 23; the first optical coupler 12 Between the second optical coupler 13 there is a first polarization beam splitter 24, a first Faraday rotator 25 and a first half-wave plate 26; between the second optical coupler 13 and the vertical cavity surface emitting laser 14 The sixth optical beam splitter 27, the fourth variable attenuator 28, the second Faraday rotator 29, the second half-wave plate 30 and the fifth variable attenuator 31; the vertical cavity surface emitting laser 14 is further provided with The second optical isolator 32 and the second polarization beam splitter 33.

Wherein, the first optical isolator 15 is disposed between the sampling grating distributed Bragg reflection laser 11 and the first optical beam splitter 16, and the sampling grating distributed Bragg reflection laser 11 splits the first optical beam through the first optical isolator 15 The transmitter 16 transmits the generated laser light.

One output end of the first optical beam splitter 16 transmits laser light to the second optical beam splitter 17; the other output end of the first optical beam splitter 16 transmits laser light to the fifth light through the third variable attenuator 20 Beam splitter 23;

One output end of the second optical beam splitter 17 transmits laser light to the fourth optical beam splitter 22 through the second variable attenuator 19, and the other output end of the second optical beam splitter 17 passes the first variable attenuation The laser 18 transmits the laser to the third optical beam splitter 21;

One output end of the third optical beam splitter 21 transmits laser light to the second photoelectric converter 6, and the output end of the second photoelectric converter 6 sequentially passes through the second low-pass filter 5, the second electric amplifier 4, and the electronic data The selector 10 is connected; the other output end of the third optical beam splitter 21 transmits laser light to the first optical coupler 12;

An output end of the fourth optical beam splitter 22 transmits laser light to the first photoelectric converter 3, and the output end of the first photoelectric converter 3 sequentially passes through the first low-pass filter 2, the first electrical amplifier 1, and the electronic data The selector 10 is connected; the other output end of the fourth optical beam splitter 22 transmits laser light to the first optical coupler 12;

One output end of the fifth optical beam splitter 23 transmits laser light to the third photoelectric converter 9, and the output end of the third photoelectric converter 9 passes through the third low-pass filter 8, the third electric amplifier 7 and the electronic data in sequence The selector 10 is connected; the other output end of the fifth optical beam splitter 23 transmits laser light to the first optical coupler 12;

The output end of the electronic data selector 10 is connected to a sampling grating distributed Bragg reflection laser 11.

The output end of the first optical coupler 12 transmits laser light to the first polarization beam splitter 24, and the output end of the first polarization beam splitter 24 transmits laser light to the second optical coupler 13; the first polarization beam splitter 24 The other type of output end transmits the laser light to the second optical coupler 13 via the first Faraday rotator 25 and the first half-wave plate 26.

The output end of the second optical coupler transmits laser light to the sixth optical beam splitter 27, and one output end of the sixth optical beam splitter 27 transmits laser light to the vertical cavity surface emitting laser 14 via the fourth variable attenuator 28; The other output end of the sixth beam splitter 27 transmits laser light to the vertical cavity surface emitting laser 14 via the second Faraday rotator 29, the second half-wave plate 30, and the fifth variable attenuator 31.

The output end of the vertical cavity surface emitting laser 14 transmits laser light to the second polarization beam splitter 33 through the second optical isolator 32, and the second polarization beam splitter 33 performs polarization output.

The working principle of the present invention is as follows: the sampling grating distributed Bragg reflector laser 11, as a tunable laser, generates light with different center frequencies under the action of different polarization currents. The first optical isolator 15 is used to prevent the first optical beam splitter 16 from generating optical feedback, and the second optical isolator 32 is used to prevent the second polarization beam splitter 33 from generating optical feedback. The first beam splitter 16 splits the external light from the sampling grating distributed Bragg reflection laser 11 into two beams. One of the beams is injected into the fifth beam splitter 23 after the light intensity is changed by the third variable attenuator 20; the other beam is separated into two beams by the second beam splitter 17 again. The light intensity is changed by the first variable attenuator 18 and the second variable attenuator 19, respectively, and then injected into the third optical beam splitter 21 and the fourth optical beam splitter 22, respectively. The two beams separated from the fourth beam splitter 22 and the third beam splitter 21 are compiled into two logical inputs I ₁ and I _{2 respectively} ; the one beam separated by the fifth beam splitter 23 It is compiled into a clock signal I _c . The first optical coupler 12 couples the three beams of light representing the signals I ₁ , I ₂ and I _c into one beam. In order to ensure that any polarized light output from the first optical coupler 12 can be accurately injected into each polarization component of the vertical cavity surface emitting laser 14 in parallel, it is necessary to convert this arbitrary polarized light into linear polarized light by some passive devices . That is, the light output by the first optical coupler 12 is divided into x-polarized light and y-polarized light by the first polarizing beam splitter 24, wherein the x-polarized light is directly injected into the second optical coupler 13, and the y-polarized light passes through the first Faraday The rotator 25 and the first half-wave plate 26 are converted into x-polarized light and then injected into the second optical coupler 13. The second optical coupler 13 couples the above two beams of light into one beam and the signal light is x-polarized light at this time. The sixth beam splitter 27 separates the x-polarized light from the second optical coupler 13 into two beams, one of which is directly injected into the vertical cavity surface emitting laser 14 after the light intensity is changed by the fourth variable attenuator 28 In the x-polarized component, another beam of light is converted into y-polarized light by the second Faraday rotator 29 and the second half-wave plate 30, and then the light intensity is changed by the fifth variable attenuator 31 and then injected into the vertical cavity surface emitting laser 14. y polarization component. Here, the output of the vertical cavity surface emitting laser 14 is divided into two chaotic polarization components by the second polarization beam splitter 33, and these two chaotic polarization outputs are compiled into two logical outputs Y ₁ and Y of the parallel all-optical digital chaotic data selector. Y ₂ .

In order to realize the data selection function for the optical signal, here, the frequency detuning Δω(Δω ₁ +Δω ₂ ) between the sampling grating distributed Bragg reflector laser 11 and the vertical cavity surface emitting laser 14 is used as the control logic signal C, where Δω ₁ And Δω ₂ are generated when the injection currents of the sampling grating distributed Bragg reflector laser 11 are μ ₀₁ and μ ₀₂ , respectively. when

When you can get

with

That is, the system can generate two parallel data selection operations. The specific control scheme for the data selection relationship between C and I ₁ , I ₂ and I _c is as follows: the other three separated by the fourth optical beam splitter 22, the third optical beam splitter 21 and the fifth optical beam splitter 23 The beams of light are converted into current signals i ₁ , i ₂ and i _c by the first photoelectric converter 3, the second photoelectric converter 6 and the third photoelectric converter 9 respectively, and then they pass through the first low-pass filter 2 and the second The second low-pass filter 5 and the third low-pass filter 8 perform filtering, and the filtered three signals are then compiled into electronics after being amplified by the first electrical amplifier 1, the second electrical amplifier 4, and the third electrical amplifier 7 respectively. The logical inputs i _i1 , i _i2 and i _{ic of the} data selector 10. The bias current μ _{0 of the} sampling grating distributed Bragg reflector laser 11 is compiled into the logical output Y ₀ of the electronic data selector 10, that is, if μ ₀ = μ ₀₁ then Y ₀₁ = 0, and the corresponding Δω=Δω ₁ (C=C ₁ ); when μ ₀ = μ ₀₂ , Y ₀₂ = 1, and the corresponding Δω=Δω ₂ (C=C ₂ ). By using the electronic data selector 10, one can obtain

This can be achieved indirectly

Based on the spin inversion model, the rate equation of the external light injected into the vertical cavity surface emitting laser 14 can be expressed by the following equation:

In the formula, the subscripts x and y represent the x polarization component and the y polarization component, respectively;

Is the normalized amplitude, g is the differential material gain, A is the slowly varying amplitude; N is the total carrier concentration; n is the difference between the upper and lower carrier concentration; k is the field attenuation rate; a is the linewidth gain factor; γ _p Is the birefringence coefficient; γ _a is the dichroic coefficient; γ _{e is the} non-radiative carrier relaxation rate; γ _s is the spin relaxation rate; μ=(Γg/k)[U/(2eVγ _e )- N ₀ ] (where μ is the normalized bias current), Γ is the field limiting factor in the active region, U is the injection current, e is the electron charge, V is the active layer volume, and N ₀ is the transparent carrier concentration Half; K _x is the x-polarized injection intensity coefficient; K _y is the y-polarized injection intensity coefficient;

Is the noise intensity, β _sp is the spontaneous emission factor; the bit duration is T and it is equal to 10ns;

It is the sum of E _i1 , E _i2 , and E _ic , A _inj is the slowly varying amplitude of the injected field; ξ _x and ξ _y are independent Gaussian white noise, the mean is 0, the variance is 1, and the correlation coefficient is <ξ _i (t) ξ _j (t) ^* >= 2δ _ij δ(tt′). Δω=ω _inj -ω _ref is the frequency detuning of the injected light field and VCSEL, ω _inj is the angular frequency of the injected light field, ω _ref is the reference angular frequency, defined as (ω _x +ω _y )/2, where ω _x = (-γ _p +aγ _a ) and ω _y =(γ _p -aγ _a ) are the angular frequencies of the x and y polarized light under the free operation of the vertical cavity surface emitting laser 14.

Figure 2 shows the chaotic geographic map of the parallel all-optical digital chaotic data selector. Here, CO indicates that the system is in chaotic state; QP indicates quasi-periodic oscillation; P ₂ indicates double-period oscillation; P ₁ indicates single-period oscillation. Under the condition of Δω=40GHz, when E _{inj is} between 0.59-0.74, the output x-PC is in a chaotic state, and when E _inj changes between 0.57-2.18, the output y-PC is in a chaotic state. If Δω=-40GHz and E _inj varies from 0.1-3, the output x-PC and y-PC are both in chaotic state. In order to determine the value of E _inj used to compile into a logical input, we calculated the dynamic evolution of the two output polarization components with E _inj under Δω=40 and -40 GHz. 3, when Δω = 40GHz, x-PC bistable ring y-PC E _inj is located in a range between 0.37-0.73, E _inj within this range makes the system chaotic output.

For the compilation of the logic input of the parallel all-optical digital chaotic data selector, we adopt the following scheme: Assume that E _inj is equal to the sum of the three square waves input by the parallel all-optical digital chaotic data selector, that is, E _inj = E _i1 +E _i2 +E _ic . Here, E _i1 , E _i2 and E _{ic are} sequentially used to compile into logical digital input signals I ₁ , I ₂ and data selection signal I _c . Since the logic input may be 0 or 1, there are 8 logic sequences (I ₁ , I ₂ , I _c ), namely (0, 0, 0), (0, 0, 1), (0, 1, 0) , (0, 1, 1), (1, 0, 0), (1, 0, 1), (1, 1, 0), (1, 1, 1). We use four standard signals to compile these 8 logical inputs. Here, E _inj1 (E _inj2 -ΔE _inj ) represents (0, 0, 0); E _inj2 represents (0, 0, 1), (0, 1 , 0) and (1, 0, 0); E _inj3 (E _inj2 +ΔE _inj ) means (0, 1, 1), (1, 0, 1) and (1, 1, 0); E _inj4 (E _inj2 +2ΔE _inj ) represents (1, 1, 1). The four standard signals are constant within a period T, where T is set to 10 ns, that is, the speed of the logic device is 0.1 GHz. We take E _inj1 = 0.63, E _inj2 = 0.66, E _inj3 = 0.69 and E _inj4 = 0.72 as the four standard signals. Here, when E _i1 = E _i2 = E _ic = 0.21, I ₁ = I ₂ = I _c =0; if E _i1 = E _i2 = E _ic = 0.24, I ₁ = I ₂ = I _c =1. In addition, if Δω=40 GHz, C=1; when Δω=-40 GHz, C=0.

For the output of the parallel all-optical digital chaotic data selector, a threshold mechanism is used here. Assuming that the mean square error (MSEs) of the light intensity E _x output by the vertical cavity surface emitting laser x polarization component is σ _x , and the MSEs of the light intensity E _y output by the y polarization component is σ _y , consider that both the logical outputs Y ₁ and Y ₂ The same threshold M, and it is 0.1. Therefore, when the minimum mean square error of E _x or E _y σ _{x min} >M and σ _{y min} >M Y ₁ =1 and Y ₂ =1, otherwise the maximum mean square error σ _{x max} <M and σ _{y max} <M When Y ₁ =0 and Y ₂ =0. According to the above logic input and output compilation principles, we give the realization of all-optical chaos logic selection operation, as shown in Figure 4, where the amplitude of the injected light field changes with the fast four-standard signal. Table 1 shows the combination of logic input, selection signal and logic output. As shown in Figure 4, the data logic selection operation of the sampling grating distributed Bragg reflector laser bias current and feedback currents i ₁ , i ₂ and i _C is controlled by an electrical data selector, which indirectly obtains Δω and E _i1 , E _i2 and E _ic data selects operation logic relationship. On this basis, when (I ₁ , I ₂ , I _C ) = (0, 0, 0), (0, 0, 1), (0, 1, 0) and (1, 0, 1), σ _{x max} is 0.0262, 0.0322, 0.0308 and 0.0281, respectively, and σ _{y max} is 0.0751, 0.0712, 0.0806 and 0.0376, respectively. Since σ _{x max} <M and σ _{y max} <M, Y ₁ =0 and Y ₂ =0; when (I ₁ , I ₂ , I _C ) = ( ₁ , 0, 0), ( ₁ , ₁ , 0) , (0, 1, 1) and (1, 1, 1), σ _{x min} is 0.1290, 0.1409, 0.1371 and 0.1567, σ _{y min} is 0.1292, 0.1510, 0.1497 and 0.1693 respectively. Since σ _{x min} >M and σ _{y min} >M, Y ₁ =1 and Y ₂ =1. Thus, we obtained two parallel all-optical chaotic data selection operations as follows:

with

As shown in the table below.

Figure 2 shows the chaotic geographic map of the parallel all-optical digital chaotic data selector. Figure 2(a) is the x-PC output of the system, and Figure 2(b) is the y-PC output. Here, CO: chaotic state; QP: quasi-periodic oscillation; P ₂ : double-period oscillation; P ₁ : single-period oscillation;

Figure 3 shows the evolution of the bi-stable state of the two polarization components with E _inj in the case of Δω = -40 GHz (a) and 40 GHz (b). Here,

The solid line represents the x-PC output; the dotted line represents the y-PC output. The arrow indicates the location of the four standard signals used to compile the logic input;

FIG. 4 shows the relationship between the frequency detuning between the sampling grating distributed Bragg reflector laser 11 and the vertical cavity surface emitting laser 14 and the amplitude of the injected light field. Dashed line: the frequency detuning between the sampling grating distribution Bragg reflector laser 11 and the vertical cavity surface emitting laser 14. Solid line: injection light field amplitude.

Figure 5 shows the relationship between the signals I ₁ , I ₂ and I _c input by the parallel all-optical digital chaotic data selector and the logic control signal C.

Figure 6 shows the x-polarized output of the parallel all-optical digital chaotic data selector. Solid line: the amplitude E _x (t) of the x-polarized light emitted by the vertical cavity surface emitting laser 14. Dashed line: Digital signal Y ₁ (t) output after threshold judgment.

Figure 7 shows the y-polarized output of the parallel all-optical digital chaotic data selector. Solid line: the amplitude E _y (t) of the y-polarized light emitted by the vertical cavity surface emitting laser 14. Dashed line: digital signal Y ₂ (t) output after threshold judgment.

Finally, it should be noted that the above is the preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as an exclusion from other embodiments, but can be used in other combinations, modifications and The environment, and can be modified within the scope of the concept described herein, through the above teachings or techniques or knowledge in related fields. Changes and changes made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the protection scope of the appended claims of the present invention.

Claims

A parallel all-optical digital chaotic data selector, characterized in that it includes a first electrical amplifier (1), a first low-pass filter (2), a first photoelectric converter (3), and a second electrical amplifier (4) , Second low-pass filter (5), second photoelectric converter (6), third electric amplifier (7), third low-pass filter (8), third photoelectric converter (9), electronic data selection (10), sampling grating distributed Bragg reflection laser (11), first optical coupler (12), second optical coupler (13), vertical cavity surface emitting laser (14);

A first optical isolator (15), a first optical beam splitter (16), and a second optical beam splitter are provided between the sampling grating distributed Bragg reflector laser (11) and the first optical coupler (12) (17), first variable attenuator (18), second variable attenuator (19), third variable attenuator (20), third optical beam splitter (21), fourth optical beam splitter (22) Fifth optical beam splitter (23); there is a first polarization beam splitter (24) and a first Faraday rotation between the first optical coupler (12) and the second optical coupler (13) (25) and the first half-wave plate (26); between the second optical coupler (13) and the vertical cavity surface emitting laser (14) there is a sixth optical beam splitter (27), a fourth variable Attenuator (28), second Faraday rotator (29), second half-wave plate (30) and fifth variable attenuator (31); the vertical cavity surface emitting laser (14) is also provided with a second An optical isolator (32) and a second polarization beam splitter (33).
The parallel all-optical digital chaotic data selector according to claim 1, characterized in that the first optical isolator (15) is provided in the sampling grating distributed Bragg reflector laser (11) and the first optical beam splitter Between (16), the sampling grating distributed Bragg reflection laser (11) transmits the generated laser light to the first optical beam splitter (16) through the first optical isolator (15).
The parallel all-optical digital chaotic data selector according to claim 2, characterized in that: an output end of the first optical beam splitter (16) transmits laser light to the second optical beam splitter (17); The other output end of the first optical beam splitter (16) transmits laser light to the fifth optical beam splitter (23) through the third variable attenuator (20);

One output end of the second optical beam splitter (17) transmits laser light to the fourth optical beam splitter (22) through the second variable attenuator (19), and the other path of the second optical beam splitter (17) The output end transmits laser light to the third optical beam splitter (21) through the first variable attenuator (18);

One output end of the third optical beam splitter (21) transmits laser light to the second photoelectric converter (6), and the output end of the second photoelectric converter (6) passes through the second low-pass filter (5), The second electrical amplifier (4) is connected to the electronic data selector (10); the other output end of the third optical beam splitter (21) transmits laser light to the first optical coupler (12);

One output end of the fourth optical beam splitter (22) transmits laser light to the first photoelectric converter (3), and the output end of the first photoelectric converter (3) sequentially passes through the first low-pass filter (2), The first electrical amplifier (1) is connected to the electronic data selector (10); the other output end of the fourth optical beam splitter (22) transmits laser light to the first optical coupler (12);

One output of the fifth optical beam splitter (23) transmits laser light to the third photoelectric converter (9), and the output of the third photoelectric converter (9) passes through the third low-pass filter (8), The third electrical amplifier (7) is connected to the electronic data selector (10); the other output end of the fifth optical beam splitter (23) transmits laser light to the first optical coupler (12);

The output end of the electronic data selector (10) is connected to a sampling grating distributed Bragg reflection laser (11).
The parallel all-optical digital chaotic data selector according to claim 1, characterized in that: the output end of the first optical coupler (12) transmits laser light to the first polarization beam splitter (24), the first One output end of the polarization beam splitter (24) transmits laser light to the second optical coupler (13); the other output end of the first polarization beam splitter (24) passes through the first Faraday rotator (25) and the first The half-wave plate (26) transmits laser light to the second optical coupler (13).
The parallel all-optical digital chaotic data selector according to claim 1, wherein the output end of the second optical coupler transmits laser light to the sixth optical beam splitter (27), and the sixth optical beam splitter One output end of the splitter (27) transmits laser light to the vertical cavity surface emitting laser (14) through the fourth variable attenuator (28); the other output end of the sixth beam splitter (27) passes through the second Faraday rotator ( 29). The second half-wave plate (30) and the fifth variable attenuator (31) transmit laser light to the vertical cavity surface emitting laser (14).
A parallel all-optical digital chaotic data selector according to claim 1, characterized in that the output end of the vertical cavity surface emitting laser (14) splits the beam to the second polarization through a second optical isolator (32) The splitter (33) transmits laser light, and the second polarizing beam splitter (33) performs polarization output.