Data processing method, device and equipment

Abstract

The invention provides a data processing method, device and equipment, and the method comprises the steps: carrying out the wavelength division multiplexing of optical signals of continuous light with at least two wavelengths, and obtaining a combined signal; performing first modulation processing on the combined signal and a target pulse sequence to obtain a first optical signal; performing pulse separation processing on the first optical signal to obtain a second optical signal; obtaining an analog signal according to the second optical signal; wherein the light intensities of the continuous light with different wavelengths are different. According to the scheme, digital-to-analog conversion can be realized by adopting continuous light, so that the digital-to-analog conversion rate is improved, and the problem of low digital-to-analog conversion rate in the prior art is well solved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a data processing method, device and equipment. Background Art

[0002] The function of a digital-to-analog converter is to convert digital signals into analog signals. It is a bridge for communication and conversion between computer digital signal processing and the real analog world, and is widely used in modern electronic design.

[0003] However, the rate of digital-to-analog conversion currently achieved usually depends on the repetition frequency of the ultrashort pulse source, and existing digital-to-analog conversion schemes often use mode-locked lasers as optical sampling sources, which results in the inability to achieve high-speed digital-to-analog conversion due to the low output frequency of the mode-locked laser.

[0004] As described above, the prior art has problems such as low digital-to-analog conversion rate. Summary of the invention

[0005] The object of the present invention is to provide a data processing method, device and equipment to solve the problem of low digital-to-analog conversion rate in the prior art.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a data processing method, including:

[0007] Performing wavelength division multiplexing on optical signals of continuous light of at least two wavelengths to obtain a combined signal;

[0008] Performing a first modulation process on the combined signal and the target pulse sequence to obtain a first optical signal;

[0009] Performing pulse separation processing on the first optical signal to obtain a second optical signal;

[0010] Obtaining an analog signal according to the second optical signal;

[0011] Among them, continuous light of different wavelengths has different light intensities.

[0012] Optionally, obtaining an analog signal according to the second optical signal includes:

[0013] Performing a second modulation process on the second optical signal and the target digital signal to obtain a third optical signal;

[0014] Performing delay and superposition processing on the third optical signal to obtain a fourth optical signal;

[0015] converting the fourth optical signal into an electrical signal;

[0016] The electrical signal is filtered to obtain an analog signal.

[0017] Optionally, the first modulation process is Mach-Zehnder modulation, and / or the second modulation process is Mach-Zehnder modulation;

[0018] And / or, the second modulation process is performed using amplitude modulation keying.

[0019] Optionally, the wavelength interval between two adjacent continuous lights is a first constant value;

[0020] And / or, the optical power ratio of two adjacent continuous lights is equal to 2 or 1 / 2.

[0021] Optionally, performing pulse separation processing on the first optical signal to obtain a second optical signal includes:

[0022] Using a first dispersive optical fiber, performing pulse separation processing on the first optical signal to obtain a second optical signal;

[0023] The dispersion coefficient of the first dispersion optical fiber is D1, the length of the first dispersion optical fiber is L1, and the following relationship is satisfied:

[0024] T0 / 4 = ΔλD1L1;

[0025] T0 is the repetition period of the optical pulse sequence corresponding to the first optical signal, and Δλ is the first constant value.

[0026] Optionally, performing delayed superposition processing on the third optical signal to obtain a fourth optical signal includes:

[0027] Using a second dispersion optical fiber, delaying and superposing the third optical signal to obtain a fourth optical signal;

[0028] The dispersion coefficient of the second dispersion optical fiber is D2, and D2 is equal to D1; the length of the second dispersion optical fiber is L2, and L2 is 3 times of L1.

[0029] Optionally, the repetition period of the target pulse sequence is equal to T0.

[0030] Optionally, also include:

[0031] Acquire a digital signal generated by a digital signal generator;

[0032] Performing digital-to-digital conversion on the digital signal to obtain the target digital signal;

[0033] The digital-to-digital conversion process includes: converting a serial digital signal into at least two parallel digital signals, performing digital filling processing on the parallel digital signals and converting them into serial digital signals.

[0034] An embodiment of the present invention further provides a data processing device, including:

[0035] A first processing module, configured to perform wavelength division multiplexing processing on optical signals of continuous light of at least two wavelengths to obtain a combined signal;

[0036] A second processing module, configured to perform a first modulation process on the combined signal and a target pulse sequence to obtain a first optical signal;

[0037] A third processing module, configured to perform pulse separation processing on the first optical signal to obtain a second optical signal;

[0038] a fourth processing module, configured to obtain an analog signal according to the second optical signal;

[0039] Among them, continuous light of different wavelengths has different light intensities.

[0040] Optionally, obtaining an analog signal according to the second optical signal includes:

[0041] Performing a second modulation process on the second optical signal and the target digital signal to obtain a third optical signal;

[0042] Performing delay and superposition processing on the third optical signal to obtain a fourth optical signal;

[0043] converting the fourth optical signal into an electrical signal;

[0044] The electrical signal is filtered to obtain an analog signal.

[0045] Optionally, the first modulation process is Mach-Zehnder modulation, and / or the second modulation process is Mach-Zehnder modulation;

[0046] And / or, the second modulation process is performed using amplitude modulation keying.

[0047] Optionally, the wavelength interval between two adjacent continuous lights is a first constant value;

[0048] And / or, the optical power ratio of two adjacent continuous lights is equal to 2 or 1 / 2.

[0049] Optionally, performing pulse separation processing on the first optical signal to obtain a second optical signal includes:

[0050] Using a first dispersive optical fiber, performing pulse separation processing on the first optical signal to obtain a second optical signal;

[0051] The dispersion coefficient of the first dispersion optical fiber is D1, the length of the first dispersion optical fiber is L1, and the following relationship is satisfied:

[0052] T0 / 4 = ΔλD1L1;

[0053] T0 is the repetition period of the optical pulse sequence corresponding to the first optical signal, and Δλ is the first constant value.

[0054] Optionally, performing delayed superposition processing on the third optical signal to obtain a fourth optical signal includes:

[0055] Using a second dispersion optical fiber, delaying and superposing the third optical signal to obtain a fourth optical signal;

[0056] The dispersion coefficient of the second dispersion optical fiber is D2, and D2 is equal to D1; the length of the second dispersion optical fiber is L2, and L2 is 3 times of L1.

[0057] Optionally, the repetition period of the target pulse sequence is equal to T0.

[0058] Optionally, also include:

[0059] A first acquisition module, used for acquiring a digital signal generated by a digital signal generator;

[0060] A fifth processing module, configured to perform digital-to-digital conversion on the digital signal to obtain the target digital signal;

[0061] The digital-to-digital conversion process includes: converting a serial digital signal into at least two parallel digital signals, performing digital filling processing on the parallel digital signals and converting them into serial digital signals.

[0062] An embodiment of the present invention further provides a data processing device, including: a processor;

[0063] The processor is used to perform wavelength division multiplexing on optical signals of continuous light of at least two wavelengths to obtain a combined signal;

[0064] Performing a first modulation process on the combined signal and the target pulse sequence to obtain a first optical signal;

[0065] Performing pulse separation processing on the first optical signal to obtain a second optical signal;

[0066] Obtaining an analog signal according to the second optical signal;

[0067] Among them, continuous light of different wavelengths has different light intensities.

[0068] Optionally, obtaining an analog signal according to the second optical signal includes:

[0069] Performing a second modulation process on the second optical signal and the target digital signal to obtain a third optical signal;

[0070] Performing delay and superposition processing on the third optical signal to obtain a fourth optical signal;

[0071] converting the fourth optical signal into an electrical signal;

[0072] The electrical signal is filtered to obtain an analog signal.

[0073] Optionally, the first modulation process is Mach-Zehnder modulation, and / or the second modulation process is Mach-Zehnder modulation;

[0074] And / or, the second modulation process is performed using amplitude modulation keying.

[0075] Optionally, the wavelength interval between two adjacent continuous lights is a first constant value;

[0076] And / or, the optical power ratio of two adjacent continuous lights is equal to 2 or 1 / 2.

[0077] Optionally, performing pulse separation processing on the first optical signal to obtain a second optical signal includes:

[0078] Using a first dispersive optical fiber, performing pulse separation processing on the first optical signal to obtain a second optical signal;

[0079] The dispersion coefficient of the first dispersion optical fiber is D1, the length of the first dispersion optical fiber is L1, and the following relationship is satisfied:

[0080] T0 / 4 = ΔλD1L1;

[0081] T0 is the repetition period of the optical pulse sequence corresponding to the first optical signal, and Δλ is the first constant value.

[0082] Optionally, performing delayed superposition processing on the third optical signal to obtain a fourth optical signal includes:

[0083] Using a second dispersion optical fiber, delaying and superposing the third optical signal to obtain a fourth optical signal;

[0084] The dispersion coefficient of the second dispersion optical fiber is D2, and D2 is equal to D1; the length of the second dispersion optical fiber is L2, and L2 is 3 times of L1.

[0085] Optionally, the repetition period of the target pulse sequence is equal to T0.

[0086] Optionally, the processor is further configured to:

[0087] Acquire a digital signal generated by a digital signal generator;

[0088] Performing digital-to-digital conversion on the digital signal to obtain the target digital signal;

[0089] The digital-to-digital conversion process includes: converting a serial digital signal into at least two parallel digital signals, performing digital filling processing on the parallel digital signals and converting them into serial digital signals.

[0090] An embodiment of the present invention further provides a data processing device, comprising a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, the above-mentioned data processing method is implemented.

[0091] An embodiment of the present invention further provides a readable storage medium on which a program is stored. When the program is executed by a processor, the steps in the above-mentioned data processing method are implemented.

[0092] The beneficial effects of the above technical solution of the present invention are as follows:

[0093] In the above scheme, the data processing method obtains a combined signal by wavelength division multiplexing optical signals of continuous light of at least two wavelengths; performs a first modulation process on the combined signal and a target pulse sequence to obtain a first optical signal; performs pulse separation processing on the first optical signal to obtain a second optical signal; and obtains an analog signal based on the second optical signal; wherein the light intensity of continuous light of different wavelengths is different; and can support the use of continuous light for digital-to-analog conversion, thereby supporting the improvement of the digital-to-analog conversion rate, and well solving the problem of low digital-to-analog conversion rate in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0094] Figure 1 A schematic diagram of a data processing method according to an embodiment of the present invention;

[0095] Figure 2 A schematic diagram of a data processing method implementation system according to an embodiment of the present invention;

[0096] Figure 3 A schematic diagram of an optical pulse after passing through a first Mach-Zehnder modulator according to an embodiment of the present invention;

[0097] Figure 4 This is a schematic diagram of a light pulse after passing through a first section of dispersive optical fiber according to an embodiment of the present invention;

[0098] Figure 5 A schematic diagram of an optical pulse after passing through a second Mach-Zehnder modulator according to an embodiment of the present invention;

[0099] Figure 6 This is a schematic diagram of a light pulse after passing through a second section of dispersion optical fiber according to an embodiment of the present invention;

[0100] Figure 7 A schematic diagram of the structure of a data processing device according to an embodiment of the present invention;

[0101] Figure 8 Schematic diagram of the structure of a data processing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0102] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0103] The following first introduces the relevant contents of this plan.

[0104] The current photonic digital-to-analog converters can be roughly divided into two categories: serial digital-to-analog conversion and parallel digital-to-analog conversion. The digital-to-analog conversion principles of serial digital-to-analog conversion and parallel digital-to-analog conversion are the same. Usually, the parallel digital-to-analog conversion scheme first needs to convert the digital signal into serial-to-parallel, and then input the converted data into the converter in parallel to obtain the analog signal.

[0105] Based on the above, the present invention provides a data processing method to solve the problem of low digital-to-analog conversion rate in the prior art. Figure 1 As shown, including:

[0106] Step 11: performing wavelength division multiplexing on optical signals of continuous light of at least two wavelengths to obtain a combined signal;

[0107] Step 12: performing a first modulation process on the combined signal and the target pulse sequence to obtain a first optical signal;

[0108] Step 13: performing pulse separation processing on the first optical signal to obtain a second optical signal;

[0109] Step 14: Obtain an analog signal according to the second optical signal; wherein continuous light of different wavelengths has different light intensities.

[0110] Here, “performing pulse separation processing on the first optical signal” can be understood as performing preliminary pulse separation, but is not limited thereto.

[0111] The data processing method provided by the embodiment of the present invention performs wavelength division multiplexing processing on optical signals of continuous light of at least two wavelengths to obtain a combined signal; performs a first modulation processing on the combined signal and a target pulse sequence to obtain a first optical signal; performs pulse separation processing on the first optical signal to obtain a second optical signal; and obtains an analog signal based on the second optical signal; wherein the light intensity of continuous light of different wavelengths is different; and the method can support the use of continuous light for digital-to-analog conversion, thereby supporting the improvement of the digital-to-analog conversion rate, and well solves the problem of low digital-to-analog conversion rate in the prior art.

[0112] Among them, obtaining an analog signal based on the second optical signal includes: performing a second modulation process on the second optical signal and the target digital signal to obtain a third optical signal; performing a delay and superposition process on the third optical signal to obtain a fourth optical signal; converting the fourth optical signal into an electrical signal; and filtering the electrical signal to obtain an analog signal.

[0113] This can further support the improvement of the digital-to-analog conversion rate. Among them, "delaying and superimposing the third optical signal" can be understood as continuing pulse walk-off, but is not limited to this.

[0114] In an embodiment of the present invention, the first modulation process is Mach-Zehnder modulation, and / or the second modulation process is Mach-Zehnder modulation; and / or the second modulation process is performed using amplitude keying.

[0115] This allows for accurate modulation processing.

[0116] Wherein, the wavelength interval between two adjacent continuous lights is a first constant value; and / or, the optical power ratio between two adjacent continuous lights is equal to 2 or 1 / 2.

[0117] This ensures accurate processing of the signal.

[0118] In an embodiment of the present invention, performing pulse separation processing on the first optical signal to obtain a second optical signal includes: using a first dispersive optical fiber to perform pulse separation processing on the first optical signal to obtain a second optical signal; wherein the dispersion coefficient of the first dispersive optical fiber is D1, the length of the first dispersive optical fiber is L1, and the following relationship is satisfied: T0 / 4=ΔλD1L1; T0 is the repetition period of the optical pulse sequence corresponding to the first optical signal, and Δλ is the first constant.

[0119] This supports accurate pulse separation processing.

[0120] The delaying and superimposing processing of the third optical signal to obtain the fourth optical signal includes: using a second dispersive optical fiber to delay and superimpose the third optical signal to obtain the fourth optical signal; wherein the dispersion coefficient of the second dispersive optical fiber is D2, and D2 is equal to D1; the length of the second dispersive optical fiber is L2, and L2 is 3 times of L1.

[0121] This allows accurate delayed overlay processing.

[0122] In the embodiment of the present invention, the repetition period of the target pulse sequence is equal to T0.

[0123] This supports accurate processing of the signal.

[0124] Furthermore, the data processing method also includes: acquiring a digital signal generated by a digital signal generator; performing digital-to-digital conversion processing on the digital signal to obtain the target digital signal; wherein the digital-to-digital conversion processing includes: converting the serial digital signal into at least two parallel digital signals, performing digital filling processing on the parallel digital signals and converting them into serial digital signals.

[0125] This can support accurate acquisition of the target digital signal.

[0126] The data processing method provided by the embodiment of the present invention is described below by taking an example, taking 4 as an example of the number of continuous light sources, and taking Mach-Zehnder modulation as an example of the first modulation process and the second modulation process.

[0127] In view of the above technical problems, an embodiment of the present invention provides a data processing method, which can be specifically implemented as a photon digital-to-analog conversion method based on pulse walk-off technology. By utilizing the pulse walk-off method to perform digital-to-analog conversion, compared with traditional solutions, the structure of the implementation system (photon digital-to-analog conversion system) is simplified, the difficulty of implementing the system is reduced, and the performance of the implementation system is greatly improved.

[0128] Specifically, this solution can be adopted as follows Figure 2 The system shown is implemented, and the system includes: a first continuous laser light source 1, a second continuous laser light source 2, a third continuous laser light source 3, a fourth continuous laser light source 4, a wavelength division multiplexer 5, a first Mach-Zehnder modulator 6, a pulse generator 7, a first section of dispersive optical fiber 8, a second Mach-Zehnder modulator 9, a digital-to-digital converter 10, a digital signal generator 11, a second section of dispersive optical fiber 12, a photodetector 13, and a low-pass filter 14.

[0129] based on Figure 2 The system shown in the figure may specifically include the following steps:

[0130] S11. Four continuous laser light sources (a first continuous laser light source 1, a second continuous laser light source 2, a third continuous laser light source 3, and a fourth continuous laser light source 4) generate continuous light of four different wavelengths, each of which has a different light intensity. After being combined by a wavelength division multiplexer 5, they enter a first Mach-Zehnder modulator 6 (corresponding to the above-mentioned wavelength division multiplexing of optical signals of continuous light of at least two wavelengths to obtain a combined signal);

[0131] Among them, the first continuous laser light source 1, the second continuous laser light source 2, the third continuous laser light source 3, and the fourth continuous laser light source 4 are respectively connected to the wavelength division multiplexer 5; the wavelength division multiplexer 5 is connected to the first Mach-Zehnder modulator 6.

[0132] The first continuous laser light source 1, the second continuous laser light source 2, the third continuous laser light source 3, and the fourth continuous laser light source 4 are the same continuous laser light sources, and only the wavelengths of the emitted light are different. Specifically, the wavelength of the first continuous laser light source is λ1, the wavelength of the second continuous laser light source is λ2, the wavelength of the third continuous laser light source is λ3, and the wavelength of the fourth continuous laser light source is λ4. The wavelength interval between λ1 and λ2 is Δλ1, the wavelength interval between λ2 and λ3 is Δλ2, and the wavelength interval between λ3 and λ4 is Δλ3, and the following conditions are satisfied:

[0133] Δλ1=Δλ2=Δλ3 (corresponding to the wavelength interval between the two adjacent continuous lights being the first constant value Δλ).

[0134] The optical power of light of different wavelengths is different, and the optical power ratio satisfies:

[0135] (corresponding to the optical power ratio of the two adjacent continuous lights being equal to 2 or 1 / 2), wherein, represents the optical power of the first continuous laser light source 1, represents the optical power of the second continuous laser light source 2, represents the optical power of the third continuous laser light source 3, represents the optical power of the fourth continuous laser light source 4.

[0136] Based on the above, it can be assumed that the first continuous laser light source 1 generates continuous light with a wavelength λ1 and an intensity of 1, the second continuous laser light source 2 generates continuous light with a wavelength λ2 and an intensity of 2, the third continuous laser light source 3 generates continuous light with a wavelength λ3 and an intensity of 4, and the fourth continuous laser light source 4 generates continuous light with a wavelength λ4 and an intensity of 8. The four continuous lights are combined by the wavelength division multiplexer 5 and enter the first Mach-Zehnder modulator 6.

[0137] S12. The pulse generator 7 generates a pulse sequence (corresponding to the above target pulse sequence) and enters the first Mach-Zehnder modulator 6;

[0138] Therein, the pulse generator 7 is connected to the first Mach-Zehnder modulator 6 .

[0139] Specifically, the pulse generator can generate an electronic pulse sequence with a repetition period of T0 (corresponding to the repetition period of the above-mentioned target pulse sequence being equal to the above-mentioned T0), which enters the first Mach-Zehnder modulator 6 .

[0140] S13. The optical signal output by the first Mach-Zehnder modulator 6 (corresponding to the above-mentioned first optical signal) propagates through the first section of dispersive optical fiber 8 (corresponding to the above-mentioned first dispersive optical fiber) and then (the obtained optical signal) enters the second Mach-Zehnder modulator 9; wherein, the optical signal output by the first Mach-Zehnder modulator 6 is obtained according to the output of the wavelength division multiplexer 5 and the output of the pulse generator 7; corresponding to the above-mentioned first modulation processing of the combined signal and the target pulse sequence to obtain the first optical signal. wherein, the optical signal output by the first section of dispersive optical fiber 8 corresponds to the above-mentioned second optical signal, and the operation of "propagating through the first section of dispersive optical fiber 8" corresponds to the above-mentioned: according to the use of the first dispersive optical fiber, the first optical signal is subjected to pulse separation processing to obtain the second optical signal.

[0141] The first Mach-Zehnder modulator 6 is connected to the second Mach-Zehnder modulator 9 via a first section of dispersive optical fiber 8 .

[0142] The dispersion coefficient of the first dispersive optical fiber is D1, the length of the first dispersive optical fiber is L1, and it satisfies:

[0143] T0 / 4=Δλ1D1L1 (corresponding to the above T0 / 4=ΔλD1L1).

[0144] The second Mach-Zehnder modulator adopts amplitude keying to modulate the digital signal (corresponding to the above-mentioned second modulation process being performed by amplitude keying).

[0145] The first Mach-Zehnder modulator 6 outputs a modulated four-wavelength (i.e., four-wavelength) optical pulse sequence with a repetition period of T0 (corresponding to the above-mentioned first optical signal). After the optical pulse sequence passes through the first section of dispersive optical fiber 8 with a dispersion coefficient of D1 and a length of L1, due to the dispersion effect, the optical pulses generated by light sources of different wavelengths are arranged at equal intervals in time (corresponding to the above-mentioned pulse separation processing of the first optical signal), and the interval between adjacent optical pulses is shortened to T0 / 4. Specifically, the optical pulses (4) after passing through the first Mach-Zehnder modulator 6 can be as follows Figure 3 As shown, the optical pulse after passing through the first section of dispersion optical fiber 8 can be Figure 4 shown.

[0146] S14. The digital signal generator 11 generates a digital signal (corresponding to the target digital signal), which is converted by the digital-to-digital converter 10 and enters the second Mach-Zehnder modulator 9 (corresponding to the second modulation process of the second optical signal and the target digital signal to obtain a third optical signal);

[0147] The digital signal generator 11 is connected to the digital-to-digital converter 10; the digital-to-digital converter 10 is connected to the second Mach-Zehnder modulator 9. The digital signal generated by the digital signal generator 11 is converted by the digital-to-digital converter 10 and then enters the second Mach-Zehnder modulator 9.

[0148] Specifically, the digital-to-digital converter 10 converts the serial digital signal X[n] output by the digital signal generator 11 into 4 parallel signals X1[n], X2[n], X3[n], and X4[n], where X1[n] is the set of the highest digits in the input 4-bit digital signal, X2[n] is the set of the second highest digits in the input 4-bit digital signal, X3[n] is the set of the second lowest digits in the input 4-bit digital signal, and X4[n] is the set of the lowest digits in the input 4-bit digital signal. Afterwards, 3 bits of "0" are added to the end of the X1[n] data to become Y1[n]; 1 bit of "0" is added to the beginning of the X2[n] data, and 2 bits of "0" are added to the end to become Y2[n]; 2 bits of "0" are added to the beginning of the X3[n] data, and 1 bit of "0" is added to the end to become Y3[n]; 3 bits of "0" are added to the beginning of the X4[n] data to become Y4[n]. Finally, the obtained 4-way parallel digital signal Y i [n] is converted into a serial signal Y[n], and the signal conversion can start from the lowest bit and end at the highest bit. This part of the operation corresponds to the above-mentioned acquisition of the digital signal generated by the digital signal generator; the digital signal is subjected to digital-to-digital conversion processing to obtain the target digital signal; wherein the digital-to-digital conversion processing includes: converting the serial digital signal into at least two parallel digital signals, performing digital filling processing on the parallel digital signals and converting them into serial digital signals.

[0149] S15. The optical signal output by the second Mach-Zehnder modulator 9 (corresponding to the third optical signal) is transmitted through the second section of the dispersive optical fiber 12 (corresponding to the second dispersive optical fiber) and then (the optical signal obtained) enters the photodetector 13 and is converted into an electrical signal (corresponding to the fourth optical signal being converted into an electrical signal). The optical signal output by the second Mach-Zehnder modulator 9 is obtained based on the output of the first section of the dispersive optical fiber 8 and the output of the digital-to-digital converter 10. The optical signal is modulated by the second optical signal and the target digital signal to obtain the third optical signal. The optical signal output by the second section of the dispersive optical fiber 12 corresponds to the fourth optical signal, and the operation of "transmitting through the second section of the dispersive optical fiber 12" corresponds to the above: using the second dispersive optical fiber, the third optical signal is subjected to delayed superposition processing to obtain the fourth optical signal.

[0150] The second Mach-Zehnder modulator 9 is connected to the photodetector 13 via the second section of dispersive optical fiber 12 .

[0151] The dispersion coefficient D2 of the second dispersive optical fiber and the dispersion coefficient D1 of the first dispersive optical fiber satisfy D2=D1; the length L2 of the second dispersive optical fiber and the length L1 of the first dispersive optical fiber satisfy L2=3L1.

[0152] The optical signal output by the second Mach-Zehnder modulator 9 (see Figure 5 ) after delay overlap through the second dispersion fiber 12 (see Figure 6 ), enters the photodetector 13 and is converted into an electrical signal. The first section of the dispersion optical fiber 8 and the second section of the dispersion optical fiber 12 can both support the realization of pulse walk-off. The first section of the dispersion optical fiber 8 can separate pulses of different wavelengths from each other, and the second section of the dispersion optical fiber 12 can delay and superimpose pulses of different wavelengths. For example, Figure 6 As shown in FIG. , after propagating through the second section of dispersion optical fiber 12, the signal obtained is: the signal with wavelength λ4 reduced to λ1 is superimposed, for example: Figure 4 The pulses with a wavelength of λ4 in the first pulse group, the pulses with a wavelength of λ3 in the second pulse group, the pulses with a wavelength of λ2 in the third pulse group, and the pulses with a wavelength of λ1 in the fourth pulse group are superimposed, but the present invention is not limited thereto.

[0153] Specifically, Figure 5 A schematic diagram showing the modulation of a target digital signal “0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0” onto an optical pulse (i.e., a schematic diagram of the output signal of the second Mach-Zehnder modulator 9, wherein the target digital signal is obtained by converting the digital signal “0, 0, 1, 1, 1, 0, 0, 1, 1, 0” generated by a digital signal generator through a digital-to-digital converter), Figure 6 : represents the signal obtained by using the pulse walk-off technology (schematic diagram of the output signal of the second section of the dispersion optical fiber 12); based on Figure 6 The output of can then be used to obtain analog signals. Figure 5 Where P1 to P4 respectively represent the periods (which may be equal to T0) of the four groups of pulses (four pulses of different wavelengths constitute one group) output by the second Mach-Zehnder modulator 9, Figure 6 Where P1 to P4 respectively represent the periods of the four groups of pulses output by the second section of dispersion optical fiber 12 (i.e. the period of the pulse group after stretching, which may be equal to 4T0), Figure 6 The numbers 3, 9 and 6 in the figure respectively represent the analog signal values ​​obtained after weighted superposition through this scheme; but the present invention is not limited to this.

[0154] S16. The electrical signal output by the photodetector 13 is passed through the low-pass filter 14 to obtain an analog signal (corresponding to the above-mentioned filtering process of the electrical signal to obtain an analog signal).

[0155] The photodetector 13 is connected to the low-pass filter 14 .

[0156] From the above, the solution provided by the embodiment of the present invention can be realized: by using a continuous laser array plus external modulation to generate a high repetition frequency multi-wavelength optical pulse source (corresponding to the above S11+S12), using a dispersion medium to connect the intensity modulator to realize the walk-off of the multi-wavelength pulse source and the modulation of the digital signal (corresponding to the above S13+S14), and then through the second section of dispersion medium to realize the continued walk-off of the modulated pulse and the weighted superposition of digital information (corresponding to the above S15+S16), thereby realizing photon digital-to-analog conversion. This solution overcomes the dependence on mode-locked lasers in previous solutions, overcomes the problem of low optical pulse repetition frequency, and greatly improves the rate and accuracy of digital-to-analog conversion. Specifically, this solution includes the following contents:

[0157] 1. A photon digital-to-analog conversion method based on pulse walk-off technology, comprising the steps of:

[0158] S1. Four continuous laser light sources generate continuous light of four different wavelengths, each with a different light intensity, and enter the first Mach-Zehnder modulator after being combined by a wavelength division multiplexer;

[0159] S2. The pulse generator generates a pulse train, which enters the first Mach-Zehnder modulator;

[0160] S3. The optical signal output by the first Mach-Zehnder modulator enters the second Mach-Zehnder modulator after propagating through the first section of dispersive optical fiber;

[0161] S4. The digital signal generator generates a digital signal, which is converted into a second Mach-Zehnder modulator through a digital-to-digital converter;

[0162] S5. The optical signal output by the second Mach-Zehnder modulator is transmitted through the second dispersion optical fiber and then enters the photodetector and is converted into an electrical signal;

[0163] S6. The electrical signal output by the photodetector is passed through a low-pass filter to obtain an analog signal.

[0164] 2. Based on 1, the electronic pulse sequence generated by the pulse generator is an electronic pulse sequence with a period of T0.

[0165] 3. Based on 2, the first continuous laser light source, the second continuous laser light source, the third continuous laser light source, and the fourth continuous laser light source are the same continuous laser light source, and the wavelengths of the emitted light are different. The wavelength of the first continuous laser light source is λ1, the wavelength of the second continuous laser light source is λ2, the wavelength of the third continuous laser light source is λ3, and the wavelength of the fourth continuous laser light source is λ4. The wavelength interval between λ1 and λ2 is Δλ1, the wavelength interval between λ2 and λ3 is Δλ2, and the wavelength interval between λ3 and λ4 is Δλ3, and the following conditions are satisfied:

[0166] Δλ1=Δλ2=Δλ3.

[0167] 4. Based on 3, the dispersion coefficient of the first section of dispersive optical fiber is D1, the length of the first section of dispersive optical fiber is L1, and the following conditions are satisfied:

[0168] T0 / 4=Δλ1D1L1.

[0169] 5. Based on 1, the optical power of light of different wavelengths is different, and the optical power ratio satisfies:

[0170]

[0171] 6. Based on 1, the second Mach-Zehnder modulator uses amplitude keying to modulate the digital signal.

[0172] 7. Based on 4, the dispersion coefficient D2 of the second section of dispersive optical fiber and the dispersion coefficient D1 of the first section of dispersive optical fiber satisfy D2=D1; the length L2 of the second section of dispersive optical fiber and the length L1 of the first section of dispersive optical fiber satisfy L2=3L1.

[0173] 8. A photon digital-to-analog conversion system based on pulse walk-off technology, comprising a first continuous laser light source, a second continuous laser light source, a third continuous laser light source, a fourth continuous laser light source, a wavelength division multiplexer, a first Mach-Zehnder modulator, a pulse generator, a first section of dispersive optical fiber, a second Mach-Zehnder modulator, a digital-to-digital converter, a digital signal generator, a second section of dispersive optical fiber, a photodetector, and a low-pass filter;

[0174] The first continuous laser light source, the second continuous laser light source, the third continuous laser light source and the fourth continuous laser light source are respectively connected to the wavelength division multiplexer; the wavelength division multiplexer is connected to the first Mach-Zehnder modulator; the pulse generator is connected to the first Mach-Zehnder modulator; the first Mach-Zehnder modulator is connected to the second Mach-Zehnder modulator through the first section of dispersive optical fiber; the digital signal generator is connected to the digital-to-digital converter; the digital-to-digital converter is connected to the second Mach-Zehnder modulator; the second Mach-Zehnder modulator is connected to the photodetector through the second section of dispersive optical fiber; and the photodetector is connected to the low-pass filter.

[0175] In summary, the embodiments of the present invention provide a method and system for photon digital-to-analog conversion based on pulse walk-off technology, which involves: using a continuous laser source array external modulation method to realize a high-speed multi-wavelength pulse sequence, and then using a multi-wavelength pulse source pulse walk-off method in a dispersive medium to further support a significant increase in the rate of photon DA (digital-to-analog) conversion, improve the performance of the photon digital-to-analog conversion system, and make the system have the advantages of easy integration and simplicity in structure. Specifically, this scheme uses the pulse walk-off method to simplify the complex structure of the traditional photon DAC; at the same time, the optical pulses generated by the original mode-locked laser are replaced by continuous light to generate optical pulses, thereby increasing the rate of the photon DAC (digital-to-analog conversion), greatly improving the performance of the photon digital-to-analog conversion system, and making the system have the advantages of simple structure, easy implementation, and high conversion rate.

[0176] The embodiment of the present invention also provides a data processing device, such as Figure 7 As shown, including:

[0177] The first processing module 71 is used to perform wavelength division multiplexing on optical signals of continuous light of at least two wavelengths to obtain a combined signal;

[0178] A second processing module 72, configured to perform a first modulation process on the combined signal and the target pulse sequence to obtain a first optical signal;

[0179] A third processing module 73, configured to perform pulse separation processing on the first optical signal to obtain a second optical signal;

[0180] A fourth processing module 74, configured to obtain an analog signal according to the second optical signal;

[0181] Among them, continuous light of different wavelengths has different light intensities.

[0182] The data processing device provided in the embodiment of the present invention performs wavelength division multiplexing processing on optical signals of continuous light of at least two wavelengths to obtain a combined signal; performs a first modulation processing on the combined signal and a target pulse sequence to obtain a first optical signal; performs pulse separation processing on the first optical signal to obtain a second optical signal; and obtains an analog signal based on the second optical signal; wherein the light intensity of continuous light of different wavelengths is different; and the device can support the use of continuous light for digital-to-analog conversion, thereby supporting the improvement of the digital-to-analog conversion rate, and well solving the problem of low digital-to-analog conversion rate in the prior art.

[0183] Among them, obtaining an analog signal based on the second optical signal includes: performing a second modulation process on the second optical signal and the target digital signal to obtain a third optical signal; performing a delay and superposition process on the third optical signal to obtain a fourth optical signal; converting the fourth optical signal into an electrical signal; and filtering the electrical signal to obtain an analog signal.

[0184] In an embodiment of the present invention, the first modulation process is Mach-Zehnder modulation, and / or the second modulation process is Mach-Zehnder modulation; and / or the second modulation process is performed using amplitude keying.

[0185] Wherein, the wavelength interval between two adjacent continuous lights is a first constant value; and / or, the optical power ratio between two adjacent continuous lights is equal to 2 or 1 / 2.

[0186] In an embodiment of the present invention, performing pulse separation processing on the first optical signal to obtain a second optical signal includes: using a first dispersive optical fiber to perform pulse separation processing on the first optical signal to obtain a second optical signal; wherein the dispersion coefficient of the first dispersive optical fiber is D1, the length of the first dispersive optical fiber is L1, and the following relationship is satisfied: T0 / 4=ΔλD1L1; T0 is the repetition period of the optical pulse sequence corresponding to the first optical signal, and Δλ is the first constant.

[0187] The delaying and superimposing processing of the third optical signal to obtain the fourth optical signal includes: using a second dispersive optical fiber to delay and superimpose the third optical signal to obtain the fourth optical signal; wherein the dispersion coefficient of the second dispersive optical fiber is D2, and D2 is equal to D1; the length of the second dispersive optical fiber is L2, and L2 is 3 times of L1.

[0188] In the embodiment of the present invention, the repetition period of the target pulse sequence is equal to T0.

[0189] Furthermore, the data processing device also includes: a first acquisition module, used to acquire the digital signal generated by the digital signal generator; a fifth processing module, used to obtain the target digital signal after performing digital-to-digital conversion processing on the digital signal; wherein the digital-to-digital conversion processing includes: converting the serial digital signal into at least two parallel digital signals, performing digital filling processing on the parallel digital signals and converting them into serial digital signals.

[0190] Among them, the implementation embodiments of the above-mentioned data processing method are all applicable to the embodiments of the data processing device and can achieve the same technical effects.

[0191] The embodiment of the present invention also provides a data processing device, such as Figure 8As shown, it includes: a processor 81;

[0192] The processor 81 is used to perform wavelength division multiplexing on optical signals of continuous light of at least two wavelengths to obtain a combined signal;

[0193] Performing a first modulation process on the combined signal and the target pulse sequence to obtain a first optical signal;

[0194] Performing pulse separation processing on the first optical signal to obtain a second optical signal;

[0195] Obtaining an analog signal according to the second optical signal;

[0196] Among them, continuous light of different wavelengths has different light intensities.

[0197] In the embodiment of the present invention, the data processing device may further include a transceiver 82 capable of communicating with the processor 81, but the present invention is not limited thereto.

[0198] The data processing device provided by the embodiment of the present invention obtains a combined signal by performing wavelength division multiplexing processing on optical signals of continuous light of at least two wavelengths; performs a first modulation processing on the combined signal and a target pulse sequence to obtain a first optical signal; performs pulse separation processing on the first optical signal to obtain a second optical signal; and obtains an analog signal based on the second optical signal; wherein the light intensity of continuous light of different wavelengths is different; and the device can support the use of continuous light for digital-to-analog conversion, thereby supporting the improvement of the digital-to-analog conversion rate, and well solving the problem of low digital-to-analog conversion rate in the prior art.

[0199] Among them, obtaining an analog signal based on the second optical signal includes: performing a second modulation process on the second optical signal and the target digital signal to obtain a third optical signal; performing a delay and superposition process on the third optical signal to obtain a fourth optical signal; converting the fourth optical signal into an electrical signal; and filtering the electrical signal to obtain an analog signal.

[0200] In an embodiment of the present invention, the first modulation process is Mach-Zehnder modulation, and / or the second modulation process is Mach-Zehnder modulation; and / or the second modulation process is performed using amplitude keying.

[0201] Wherein, the wavelength interval between two adjacent continuous lights is a first constant value; and / or, the optical power ratio between two adjacent continuous lights is equal to 2 or 1 / 2.

[0202] In an embodiment of the present invention, performing pulse separation processing on the first optical signal to obtain a second optical signal includes: using a first dispersive optical fiber to perform pulse separation processing on the first optical signal to obtain a second optical signal; wherein the dispersion coefficient of the first dispersive optical fiber is D1, the length of the first dispersive optical fiber is L1, and the following relationship is satisfied: T0 / 4=ΔλD1L1; T0 is the repetition period of the optical pulse sequence corresponding to the first optical signal, and Δλ is the first constant.

[0203] The delaying and superimposing processing of the third optical signal to obtain the fourth optical signal includes: using a second dispersive optical fiber to delay and superimpose the third optical signal to obtain the fourth optical signal; wherein the dispersion coefficient of the second dispersive optical fiber is D2, and D2 is equal to D1; the length of the second dispersive optical fiber is L2, and L2 is 3 times of L1.

[0204] In the embodiment of the present invention, the repetition period of the target pulse sequence is equal to T0.

[0205] Furthermore, the processor is also used to: obtain a digital signal generated by a digital signal generator; and obtain the target digital signal after performing digital-to-digital conversion processing on the digital signal; wherein the digital-to-digital conversion processing includes: converting a serial digital signal into at least two parallel digital signals, performing digital filling processing on the parallel digital signals and converting them into serial digital signals.

[0206] Among them, the implementation embodiments of the above-mentioned data processing method are all applicable to the embodiments of the data processing device and can achieve the same technical effects.

[0207] An embodiment of the present invention further provides a data processing device, comprising a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, the above-mentioned data processing method is implemented.

[0208] Among them, the implementation embodiments of the above-mentioned data processing method are all applicable to the embodiments of the data processing device and can achieve the same technical effects.

[0209] An embodiment of the present invention further provides a readable storage medium on which a program is stored. When the program is executed by a processor, the steps in the above-mentioned data processing method are implemented.

[0210] Among them, the implementation embodiments of the above-mentioned data processing method are all applicable to the embodiments of the readable storage medium and can achieve the same technical effects.

[0211] It should be noted that many functional components described in this specification are referred to as modules in order to more particularly emphasize the independence of their implementation methods.

[0212] In the embodiment of the present invention, module can be implemented with software so that it can be executed by various types of processors. For example, an executable code module of an identification can include one or more physical or logical blocks of computer instructions, for example, it can be constructed as an object, process or function. Nevertheless, the executable code of the identified module does not need to be physically located together, but can include different instructions stored in different positions, and when these instructions are logically combined together, it constitutes a module and realizes the specified purpose of the module.

[0213] In fact, executable code module can be a single instruction or many instructions, and can even be distributed on a plurality of different code segments, distributed among different programs, and distributed across a plurality of memory devices. Similarly, operating data can be identified in the module, and can be implemented and organized in the data structure of any appropriate type according to any appropriate form. The operating data can be collected as a single data set, or can be distributed in different locations (including on different storage devices), and can only be present on a system or network as an electronic signal at least in part.

[0214] When a module can be implemented by software, considering the level of existing hardware technology, a person skilled in the art can build a corresponding hardware circuit to implement the corresponding function of the module that can be implemented by software without considering the cost. The hardware circuit includes a conventional very large scale integration (VLSI) circuit or gate array and existing semiconductors such as logic chips, transistors, or other discrete components. The module can also be implemented by a programmable hardware device, such as a field programmable gate array, a programmable array logic, a programmable logic device, etc.

[0215] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary personnel in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A data processing method, characterized in that: include: Performing wavelength division multiplexing on optical signals of continuous light of at least two wavelengths to obtain a combined signal; Performing a first modulation process on the combined signal and the target pulse sequence to obtain a first optical signal; Performing pulse separation processing on the first optical signal to obtain a second optical signal; Obtaining an analog signal according to the second optical signal; Among them, continuous light of different wavelengths has different light intensities.

2. The data processing method according to claim 1, characterized in that: The step of obtaining an analog signal according to the second optical signal comprises: Performing a second modulation process on the second optical signal and the target digital signal to obtain a third optical signal; Performing delay and superposition processing on the third optical signal to obtain a fourth optical signal; converting the fourth optical signal into an electrical signal; The electrical signal is filtered to obtain an analog signal.

3. The data processing method according to claim 2, characterized in that: The first modulation process is Mach-Zehnder modulation, and / or the second modulation process is Mach-Zehnder modulation; And / or, the second modulation process is performed using amplitude modulation keying.

4. The data processing method according to claim 2, characterized in that: The wavelength interval between two adjacent continuous lights is a first constant value; And / or, the optical power ratio of two adjacent continuous lights is equal to 2 or 1 / 2.

5. The data processing method according to claim 4, characterized in that: The step of performing pulse separation processing on the first optical signal to obtain a second optical signal includes: Using a first dispersive optical fiber, performing pulse separation processing on the first optical signal to obtain a second optical signal; The dispersion coefficient of the first dispersive optical fiber is D1, the length of the first dispersive optical fiber is L1, and the following relationship is satisfied: T0 / 4 = ΔλD1L1; T0 is a repetition period of an optical pulse sequence corresponding to the first optical signal, and Δλ is the first constant value.

6. The data processing method according to claim 5, characterized in that: The step of performing delay and superposition processing on the third optical signal to obtain a fourth optical signal includes: Using a second dispersion optical fiber, delaying and superposing the third optical signal to obtain a fourth optical signal; The dispersion coefficient of the second dispersion optical fiber is D2, and D2 is equal to D1; the length of the second dispersion optical fiber is L2, and L2 is 3 times of L1.

7. The data processing method according to claim 5, characterized in that: The repetition period of the target pulse sequence is equal to T0.

8. The data processing method according to claim 2, characterized in that: Also includes: Acquire a digital signal generated by a digital signal generator; Performing digital-to-digital conversion on the digital signal to obtain the target digital signal; The digital-to-digital conversion process includes: converting a serial digital signal into at least two parallel digital signals, performing digital filling processing on the parallel digital signals and converting them into serial digital signals.

9. A data processing device, characterized in that: include: A first processing module, configured to perform wavelength division multiplexing processing on optical signals of continuous light of at least two wavelengths to obtain a combined signal; A second processing module, configured to perform a first modulation process on the combined signal and a target pulse sequence to obtain a first optical signal; A third processing module, configured to perform pulse separation processing on the first optical signal to obtain a second optical signal; a fourth processing module, configured to obtain an analog signal according to the second optical signal; Among them, continuous light of different wavelengths has different light intensities.

10. The data processing device according to claim 9, characterized in that: The step of obtaining an analog signal according to the second optical signal comprises: Performing a second modulation process on the second optical signal and the target digital signal to obtain a third optical signal; Performing delay and superposition processing on the third optical signal to obtain a fourth optical signal; converting the fourth optical signal into an electrical signal; The electrical signal is filtered to obtain an analog signal.

11. The data processing device according to claim 10, characterized in that: The first modulation process is Mach-Zehnder modulation, and / or the second modulation process is Mach-Zehnder modulation; And / or, the second modulation process is performed using amplitude modulation keying.

12. The data processing device according to claim 10, characterized in that: The wavelength interval between two adjacent continuous lights is a first constant value; And / or, the optical power ratio of two adjacent continuous lights is equal to 2 or 1 / 2.

13. The data processing device according to claim 12, characterized in that: The step of performing pulse separation processing on the first optical signal to obtain a second optical signal includes: Using a first dispersive optical fiber, performing pulse separation processing on the first optical signal to obtain a second optical signal; The dispersion coefficient of the first dispersive optical fiber is D1, the length of the first dispersive optical fiber is L1, and the following relationship is satisfied: T0 / 4 = ΔλD1L1; T0 is a repetition period of an optical pulse sequence corresponding to the first optical signal, and Δλ is the first constant value.

14. The data processing device according to claim 13, characterized in that: The step of performing delay and superposition processing on the third optical signal to obtain a fourth optical signal includes: Using a second dispersion optical fiber, delaying and superposing the third optical signal to obtain a fourth optical signal; The dispersion coefficient of the second dispersion optical fiber is D2, and D2 is equal to D1; the length of the second dispersion optical fiber is L2, and L2 is 3 times of L1.

15. The data processing device according to claim 13, characterized in that: The repetition period of the target pulse sequence is equal to T0.

16. The data processing device according to claim 10, characterized in that: Also includes: A first acquisition module, used for acquiring a digital signal generated by a digital signal generator; A fifth processing module, configured to perform digital-to-digital conversion on the digital signal to obtain the target digital signal; The digital-to-digital conversion process includes: converting a serial digital signal into at least two parallel digital signals, performing digital filling processing on the parallel digital signals and converting them into serial digital signals.

17. A data processing device, characterized in that: include: processor; The processor is used to perform wavelength division multiplexing on optical signals of continuous light of at least two wavelengths to obtain a combined signal; Performing a first modulation process on the combined signal and the target pulse sequence to obtain a first optical signal; Performing pulse separation processing on the first optical signal to obtain a second optical signal; Obtaining an analog signal according to the second optical signal; Among them, continuous light of different wavelengths has different light intensities.

18. A data processing device comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that: When the processor executes the program, the data processing method according to any one of claims 1 to 8 is implemented.

19. A readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the steps in the data processing method according to any one of claims 1 to 8 are implemented.

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