Optical encryption processing chip and processing system based on tunable micro-ring array

Abstract

The invention provides an optical encryption processing chip and processing system based on tunable micro-ring arrays, the chip comprises a light generation unit, a data loading unit, a data encryption unit, a data processing unit, a digital-to-analog converter and an analog-to-digital converter, the data encryption unit is constructed based on N * N tunable micro-ring arrays, a data loading unit loads to-be-processed data sent by a data processing unit to signal light, and then a data encryption unit constructed based on N * N micro-ring arrays encrypts the to-be-processed data on the signal light based on encryption weight information sent by the data processing unit to obtain encrypted signal light. An on-chip optical domain encryption result can be obtained through one-time operation by utilizing an optical encryption processing chip based on the tunable micro-ring array through a designed transmission and calculation integrated optical processing architecture, the increasing high-parallel operation requirement is met, the optical domain encryption processing chip is matched with a control algorithm loaded on a data processing unit, and the on-chip optical domain encryption processing system is suitable for being applied to a data processing unit. The tunable micro-ring array is controlled in real time through the electrical port, so that the whole optical chip can work continuously in all weather, and the encrypted data transmission capability and the anti-interference capability of the optical chip are enhanced.

Description

Technical Field

[0001] The present invention relates to the field of optical integrated chip technology and nanophotonics technology, and in particular to an optical encryption processing chip and a processing system based on a tunable microring array. Background Art

[0002] In recent years, information encryption has become a rapidly developing research field, involving the application of multidisciplinary mathematical knowledge, including number theory, algebra, and probability theory. The historical development of cryptography can be divided into two stages: classical cryptography, exemplified by the Caesar cipher, and modern cryptography, exemplified by RSA. With the recent advancement of information technology, particularly quantum technology, traditional encryption algorithms are facing new challenges. Optical encryption, which leverages the various physical properties of light (such as amplitude, phase, and polarization) to achieve secure information transmission and storage, has become a popular choice for researchers due to its high speed, high parallelism, and its natural advantages as an information carrier.

[0003] Over the past three decades, mainstream optical encryption methods have included dual random phase encoding based on 4f optical systems, optical encryption based on fractional Fourier transforms, optical encryption based on digital holography, and optical encryption based on phase-shifting interferometry. Furthermore, a number of studies have emerged on optical encryption using phase recovery algorithms, wavelet transforms, computational ghost imaging, stacked imaging, metasurfaces, and other technologies. Currently, these optical encryption methods still face two challenges: first, compared with electrical encryption processors, optical encryption systems based on spatial light propagation are typically larger, and their operational flexibility and stability need to be improved, making them difficult to meet the demands of miniaturization and integration of data encryption equipment. Second, many existing optical encryption systems often have poor anti-attack capabilities. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides an optical encryption processing chip and a processing system based on a tunable micro-ring array.

[0005] The present invention provides an optical encryption processing chip based on a tunable microring array, comprising a light generating unit, a data loading unit, a data encryption unit, a data processing unit, a digital-to-analog converter, and an analog-to-digital converter. The data encryption unit is constructed based on an N*N tunable microring array, wherein: a light generating unit, configured to generate light beams of different wavelengths, split the N light beams of different wavelengths to obtain signal light, and input the signal light into the data loading unit; A data processing unit, configured to convert the initial data into digital data to be processed, and input the data to be processed into a digital-to-analog converter; A digital-to-analog converter, used for converting the data to be processed in a digital state into the data to be processed in an analog state; a data loading unit, configured to modulate the data to be processed in an analog state onto a signal light to obtain a modulated signal light, wherein the modulated signal light is loaded with the data to be processed, and to combine the modulated signal lights to obtain a first signal light; wherein the first signal light represents the signal light loaded with the data to be processed; a data encryption unit, configured to adjust the light refractive index based on the encryption weight information sent by the data processing unit, apply the light refractive index to the first signal light, encrypt the data to be processed on the first signal light, and obtain the second signal light; the second signal light represents the signal light with encrypted data, and collect external signal light, wherein the external signal light is the second signal light emitted by the N*N tunable microring array of the external chip; an analog-to-digital converter, configured to convert an external signal light in an analog state into an external signal light in a digital state; The data processing unit is also used to decrypt the external signal light in a digital state to obtain the decrypted data.

[0006] According to an optical encryption processing chip based on a tunable microring array provided by the present invention, the data encryption unit includes N*N tunable microring arrays and a detector array, wherein: N*N tunable microring arrays, configured to adjust a light refractive index based on encryption weight information sent by the data processing unit, and apply the light refractive index to the first signal light to encrypt the data to be processed on the first signal light to obtain a second signal light; the second signal light represents the signal light carrying the encrypted data; The detector array is used to collect external signal light, where the external signal light is the second signal light emitted by the N*N tunable micro-ring array of the external chip.

[0007] According to the present invention, an optical encryption processing chip based on a tunable microring array is provided, wherein N*N tunable microring arrays are composed of N*N cross-waveguide microring units, wherein the cross-waveguide microring unit is composed of a microring resonator and a cross-waveguide; the cross-waveguide is used to input the first signal light and output the second signal light, and the cross-waveguide includes two input ends and four output ends; the microring resonator is used to adjust the light refractive index based on the encryption weight information sent by the data processing unit, and apply the light refractive index to the first signal light, encrypt the data to be processed on the first signal light, and obtain the second signal light.

[0008] According to an optical encryption processing chip based on a tunable microring array provided by the present invention, an electrical interface and a radio frequency interface are provided on the detector array, and the digital-to-analog converter is used to load an electrical signal to the electrical interface so that the refractive index of the detector array changes according to the change of the electrical signal; the analog-to-digital converter is used to lead the external signal light in the analog state out of the radio frequency interface and convert it into the external signal light in the digital state to the data processing unit.

[0009] According to an optical encryption processing chip based on a tunable microring array provided by the present invention, a data loading unit includes an intensity modulator array and a wavelength division multiplexer array, wherein: an intensity modulator array, configured to modulate the data to be processed in an analog state onto the signal light to obtain modulated signal light, wherein the modulated signal light carries the data to be processed; The wavelength division multiplexer array is used to combine the modulated signal lights to obtain first signal lights.

[0010] According to the present invention, an optical encryption processing chip based on a tunable microring array is provided, wherein the intensity modulator array is composed of N*N intensity modulators, which are composed of any one of a Maxim modulator structure based on electro-optic effect or thermo-optic effect, a microring modulator structure, a microdisk modulator structure, and a photonic crystal structure; The intensity modulator array is provided with a DC interface and a radio frequency interface, and the digital-to-analog converter loads the electrical signal preprocessed by the data processing unit to the DC interface, so that the refractive index of the intensity modulator changes according to the change of the electrical signal; the N*N tunable microring array is provided with a DC interface, and the digital-to-analog converter loads the electrical signal preprocessed by the data processing unit to the DC interface, so that the refractive index of the microring array changes according to the change of the electrical signal.

[0011] According to an optical encryption processing chip based on a tunable microring array provided by the present invention, the light generating unit includes a laser array and a beam splitter array, wherein: A laser array, configured to emit optical signals of N different wavelengths; The beam splitter array is used to split N light beams of different wavelengths to obtain signal light, and input the signal light into the intensity modulator array.

[0012] According to the present invention, an optical encryption processing chip based on a tunable microring array is provided, and the chip also includes an optical fiber array. The output ends of the N*N tunable microring arrays are connected to the input ends of the optical fiber array for remote transmission of encrypted data; the output end of the optical fiber array is connected to the output end of the detector array, the output end of the detector array is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected to the input end of the data processing unit.

[0013] According to the present invention, an optical encryption processing chip based on a tunable microring array is provided, and the chip also includes a monitor array. The output ends of the N*N tunable microring arrays are connected to the input ends of the monitor array, the output ends of the monitor array are connected to the input ends of the analog-to-digital converter, and the output ends of the analog-to-digital converter are connected to the input ends of the data processing unit for real-time monitoring of the data encryption process.

[0014] The present invention also provides a processing system, including the above-mentioned optical encryption processing chip based on the tunable micro-ring array.

[0015] The present invention provides an optical encryption processing chip and processing system based on a tunable microring array. In this system, a data loading unit loads the data to be processed, sent by a data processing unit, onto a signal light. A data encryption unit constructed based on an N*N microring array then encrypts the data to be processed on the signal light based on encryption weight information sent by the data processing unit, thereby generating an encrypted signal light. The present invention utilizes a designed integrated transmission and calculation optical processing architecture in the optical encryption processing chip based on a tunable microring array to obtain on-chip optical domain encryption results in a single operation, meeting the growing demand for highly parallel computing. This chip is compatible with the control algorithm loaded on the data processing unit and controls the tunable microring array in real time through an electrical port, enabling the entire optical chip to operate uninterruptedly around the clock, enhancing its encrypted data transmission capabilities and anti-interference capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the optical encryption processing chip based on the tunable microring array provided by the present invention.

[0018] Figure 2The figure is a schematic diagram of the structure of the cross-waveguide microring unit in the optical encryption processing chip based on the tunable microring array provided by the present invention.

[0019] Figure 3 This is a schematic diagram of the 2*2 microring array structure in the optical encryption processing chip based on the tunable microring array provided by the present invention. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] The following combination Figure 1-Figure 3 The present invention describes an optical encryption processing chip and a processing system based on a tunable micro-ring array.

[0022] Figure 1 The present invention provides a schematic diagram of an optical encryption processing chip based on a tunable micro-ring array. Figure 1 The optical encryption processing chip can integrate components including a light generating unit 1, a data loading unit 2, a data encryption unit 3, a data processing unit 4, a digital-to-analog converter 5, and an analog-to-digital converter 6. The data encryption unit is constructed based on an N*N tunable microring array, wherein: A light generating unit is used to generate light beams of different wavelengths, split the N light beams of different wavelengths to obtain signal light, and input the signal light into the data loading unit; A data processing unit, configured to convert the initial data into digital data to be processed, and input the processed data into a digital-to-analog converter; A digital-to-analog converter, used for converting the data to be processed in a digital state into the data to be processed in an analog state; a data loading unit, configured to modulate the data to be processed in an analog state onto the signal light to obtain a modulated signal light, wherein the modulated signal light is loaded with the data to be processed, and to combine the modulated signal lights to obtain a first signal light; wherein the first signal light represents the signal light loaded with the data to be processed; a data encryption unit, configured to adjust the light refractive index based on the encryption weight information sent by the data processing unit, apply the light refractive index to the first signal light, encrypt the data to be processed on the first signal light, and obtain a second signal light; the second signal light represents the signal light with the encrypted data, and collect external signal light, where the external signal light is the second signal light emitted by the N*N tunable microring array of the external chip; an analog-to-digital converter, configured to convert an external signal light in an analog state into an external signal light in a digital state; The data processing unit is also used to decrypt the external signal light in a digital state to obtain the decrypted data.

[0023] It should be noted that compared to electrical encryption processing systems, optical encryption processing systems based on spatial light propagation are generally larger in size, and their operational flexibility and stability need to be improved, making it difficult to meet the needs of miniaturization and integration of data encryption equipment. To this end, it is necessary to design optical encryption processing systems from the perspective of integration and miniaturization. Therefore, the present invention integrates encryption functions into an optical encryption processing chip. The components integrated on the optical encryption processing chip include a light generation unit, a data loading unit, a data encryption unit, a data processing unit, a digital-to-analog converter, and an analog-to-digital converter. The data encryption unit is constructed based on an N*N tunable microring array. The main purpose is to encrypt data in the optical domain based on the tunable microring array.

[0024] In the present invention, the microring array is the core of the on-chip optical domain encryption algorithm, and a single microring is an important foundation of the microring array. The working principle of the microring is mainly the interference of light. By placing the input waveguide near the microring, the input light is coupled to the microring through the evanescent field. Through interference, the intensity of the light coupled into the ring can be enhanced and is significantly higher than the light intensity in the bus waveguide. This field enhancement is an important property of the microring resonator. Light that does not meet the resonant wavelength conditions will be transmitted through the bus waveguide and will not enter the interior of the microring resonator. The present invention can achieve data encryption processing by expanding the scale of the microring array and encrypting information carrying different data in light of different wavelengths.

[0025] In the present invention, an intelligent control algorithm is employed in the data processing unit to control the data loading unit and the data encryption unit in real time, enabling the data loading unit and the data encryption unit to load data into the optical domain and encrypt data in the optical domain, respectively. This enhances the overall optical chip's encrypted data transmission and anti-interference capabilities. To this end, the data processing unit converts initial data (e.g., image data) into digital data to be processed, inputs the data to be processed into a digital-to-analog converter, and the digital-to-analog converter converts the digital data to analog data to be processed, which is then sent to the data loading unit. The data loading unit then loads the data to be processed onto signal light, generating signal light loaded with the data to be processed. The data processing unit also converts encryption weight information into digital encryption weight information, inputs the information into the digital-to-analog converter, and the digital-to-analog converter converts the digital encryption weight information into analog encryption weight information, which is then sent to the data encryption unit. The data encryption unit then encrypts the data to be processed on the signal light loaded with the data to be processed based on the analog encryption weight information, generating signal light loaded with the encrypted data. It should be noted that the data encryption unit 3 includes N*N tunable micro-ring arrays 31 and a detector array 32, wherein: N*N tunable microring arrays, configured to adjust the light refractive index based on encryption weight information sent by the data processing unit, and apply the light refractive index to the first signal light to encrypt the data to be processed on the first signal light to obtain a second signal light; the second signal light represents the signal light carrying the encrypted data; The detector array is used to collect external signal light, where the external signal light is the second signal light emitted by the N*N tunable micro-ring array of the external chip.

[0026] It should be noted that the digital-to-analog converter sends analog signals to the intensity modulator array and the N*N tunable microring arrays respectively, in order to change the voltage or current in the intensity modulator array and the N*N tunable microring arrays, thereby changing the optical refractive index of the intensity modulator array and the N*N tunable microring arrays, so as to achieve the purpose of modulating the optical signal, completing data loading in the optical domain and data encryption in the optical signal.

[0027] After the data is encrypted, it will be decrypted from one terminal to another. The terminal is equipped with the chip provided by the present invention, and the chip also has the decryption function.

[0028] During the signal light transmission process, the chip also includes an optical fiber array 7, and the output ends of the N*N tunable microring arrays are connected to the input end of the optical fiber array for remote transmission of signal light for encrypted data; the output end of the optical fiber array is connected to the output end of the detector array, the output end of the detector array is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected to the input end of the data processing unit.

[0029] Since the signal light of the encrypted data will be transmitted from one terminal to another for decryption, the detector array is used to collect the external signal light, which is the signal light containing the encrypted data emitted by the N*N tunable microring array of the external chip; the analog-to-digital converter converts the external signal light in the analog state into the external signal light in the digital state; and the data processing unit decrypts the external signal light in the digital state to obtain the decrypted data.

[0030] In further description of the above chip, the data loading unit 2 includes an intensity modulator array 21 and a wavelength division multiplexer array 22, wherein: An intensity modulator array is used to modulate the data to be processed in an analog state onto the signal light to obtain a modulated signal light, wherein the modulated signal light carries the data to be processed; The wavelength division multiplexer array is used to combine the modulated signal lights to obtain the first signal lights.

[0031] The intensity modulator array consists of N*N intensity modulators, constructed using any of the following structures: a Magneto-Layered Modulator (MAM) based on the electro-optic or thermo-optic effect, a microring modulator, a microdisk modulator, or a photonic crystal structure, to achieve intensity modulation. The modulation rate of the electro-optic modulator is more than two orders of magnitude faster than that of the thermo-optic modulator. The output of the intensity modulator array can be connected to a wavelength division multiplexer (WDM) array. The WDM array consists of N WDMs. A single WDM is an N-input, 1-output optical device that combines N wavelengths of signal light into a single beam. The WDM channel spacing is required to be 25 GHz, 50 GHz, 100 GHz, 200 GHz, or 400 GHz, with a sideband suppression ratio greater than 30 dB and an insertion loss less than 6 dB. The WDM is constructed using arrayed waveguide gratings, cascaded microring resonators, or cascaded Magneto-Layered Interferometers.

[0032] In addition, the intensity modulator array will have N*N optical output signals, which will be input into the wavelength division multiplexer array in a certain way to complete beam combining, forming N signal lights loaded with image information.

[0033] In the present invention, the light generating unit 1 comprises a laser array 11 and a beam splitter array 12, wherein: A laser array, configured to emit optical signals of N different wavelengths; The beam splitter array is used to split N light beams of different wavelengths to obtain signal light, and input the signal light into the intensity modulator array.

[0034] The output end of the laser array can be connected to the input end of the beam splitter array. The laser array can be used to generate N different wavelengths of light. The laser array can be composed of an on-chip multi-wavelength laser or an optical frequency comb light source based on InP, silicon, silicon nitride, or III-V, or a heterojunction composed of a structure of the above different materials and a two-dimensional material that is strongly coupled. The beam splitter array is composed of N beam splitters, each of which realizes 1-to-N equal beam splitting, and the beam splitting imbalance within a 35nm bandwidth is <0.3dB. Furthermore, N optical signals pass through the beam splitter array, and each signal light is split into N beams by a beam splitter, and then input into the intensity modulator array.

[0035] In a further description of the above chip, an N*N tunable microring array is composed of N*N cross-waveguide microring units, wherein the cross-waveguide microring unit is composed of a microring resonator and a cross-waveguide; the cross-waveguide is used to input the first signal light and output the second signal light, and the cross-waveguide includes two input ends and four output ends; the microring resonator is used to adjust the refractive index of light based on the encryption weight information sent by the data processing unit, and apply the refractive index of light to the first signal light, encrypt the data to be processed on the first signal light, and obtain the second signal light.

[0036] A microring resonator is composed of a circular microring structure, an elliptical microring structure, a cascaded circular microring structure, a cascaded elliptical microring structure or a variation of any of the above structures based on the electro-optic effect or the thermo-optic effect to realize the loading function of the encryption algorithm weight matrix.

[0037] Figure 2 The figure is a schematic diagram of the structure of the cross-waveguide microring unit in the optical encryption processing chip based on the tunable microring array provided by the present invention.

[0038] Figure 3 This is a schematic diagram of the 2*2 microring array structure in the optical encryption processing chip based on the tunable microring array provided by the present invention.

[0039] Specifically, the microring array is the core of the on-chip optical domain encryption algorithm, and a single microring is the critical foundation of the microring array. The microring operates primarily based on light interference. By placing an input waveguide (also known as the input bus) near the microring, the input light is coupled into the microring via the evanescent field. This interference enhances the intensity of the light coupled into the ring and is significantly higher than that in the bus waveguide. This field enhancement is a key property of the microring resonator. Light that does not meet the resonant wavelength requirements is transmitted through the bus waveguide and escapes without entering the microring resonator.

[0040] In one embodiment, the shape of a single microring is adjusted as needed to form a cross-waveguide microring unit (see Figure 2), comprising a microring resonator and a cross-waveguide. The cross-waveguide microring unit comprises two input ports and four output ports, denoted as input 1, input 2, output 1_1, output 1_2, output 2_1, and output 1_2. The cross-waveguide microring unit is easy to array and has high flexibility and scalability. By applying voltage, its refractive index is effectively controlled, thereby controlling the resonant wavelength. In other words, the output ratio of a certain wavelength of light at output port 1 and output port 2 can be changed by changing the control voltage, thereby realizing a kind of "physical calculation": Where W is the voltage-controlled transmission ratio. Leveraging this computational property, data processing can be achieved by scaling up the microring array to carry different data using light of different wavelengths.

[0041] In one embodiment, a 2×2 micro-ring array is used as an example to demonstrate the on-chip optical domain encryption process. It is worth noting that for the convenience of demonstration, only one input port is used, such as Figure 3 As shown in Figure 2. Where x1-x4 represents the input data, and λ1-λ4 represents the carrier wavelength. The signal intensity output from the output port of the 2×2 microring array satisfies the following formula: In the present invention, the detector array is connected to an external optical fiber array to collect the external second signal light and hand it over to the data processing unit for decryption. The detector array is composed of N detectors. Among them, the detector can be composed of InP-based, silicon-based, silicon nitride-based, III-V group pin-type detectors or avalanche photodetectors, and its responsivity is >1A / W, the working bandwidth is >20GHz, and the dark current is <100nA. The detector array is provided with an electrical interface and a radio frequency interface. The digital-to-analog converter is used to load the electrical signal to the electrical interface so that the refractive index of the detector array changes according to the change of the electrical signal; the analog-to-digital converter is used to lead the external signal light in the analog state from the radio frequency interface and convert it into the external signal light in the digital state to the data processing unit.

[0042] It's important to note that the optical power outputted by the fiber array's output port is collected by a photodetector. Due to factors such as process technology, the output signal from each waveguide can only be absorbed by a single photodetector. This means that the signals of light of different wavelengths processed by microrings of varying sizes along the same waveguide are no longer separable but are instead uniformly converted into a single "total power." This characteristic complicates algorithm design, requiring additional consideration for algorithm decryption. It also complicates algorithm cracking, enhancing its security.

[0043] In addition, from the above formula, it is noted that when the system operates normally, the following equation holds: This feature can be used to monitor whether the system is working properly. It also reminds us that when designing the algorithm, the output signals of the two ports cannot be transmitted as ciphertext at the same time, otherwise there will be serious security risks.

[0044] Here, the sizes of the microring resonators in the 2×2 microring array are different. Here, two diameters of microrings are selected, for example, 9 and 13 They are distributed diagonally, and their resonant wavelengths are 1538nm and 1542.5nm respectively. Light of each wavelength can only interact with microrings of a specific diameter to achieve the adjustment of the transmittance representing the encryption weight information. In the microring array, each input waveguide carries signal light of two wavelengths. Based on wavelength division multiplexing technology, each wavelength can work independently without the problem of signal crosstalk. As mentioned above, each cross-waveguide microring unit uses only one input port and two output ports, and the corresponding transmittance is determined by the voltage applied to the phase shifter in the microring. For ease of calculation, the sum of the transmittances of all output ports is set to 1, but in actual systems there may be various losses that cause the sum of the transmittances to be <1. The signal that completes optical encryption needs to be compensated to ensure the accuracy of the results. The calculation formula for compensated transmission is as follows: Where, and Here, is the transmittance before and after compensation under an applied voltage of V volts, and p represents the compensation parameter. The encryption weight information consists of random 2x2 convolution kernels. This information is mapped into a voltage matrix using the mapping relationship between the kernel weights and output ports and the voltage-transmission correlation. This is then loaded into the 2x2 microring array via a digital-to-analog converter and data processing unit. This completes the on-chip optical domain encryption process.

[0045] To this end, the optical encryption processing chip further includes a monitor array 8, which is connected to the N*N tunable micro-ring arrays and is used to monitor the encryption effect of the second signal light and send the monitoring results to the data processing unit.

[0046] Another part of the output end of the above-mentioned N*N microring array is connected to the input end of the monitor array, the output end of the monitor array is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected to the input end of the data processing unit, thereby completing real-time monitoring of the optical image encryption process.

[0047] For example, during image encryption transmission, after confirming the image information to be encrypted, the computer sends the image to the data processing unit that controls the optical encryption processing chip. The data processing unit then performs operations such as flattening the two-dimensional image, converting the two-dimensional information into one-dimensional information that the computing system can process. This one-dimensional information is then transmitted to a digital-to-analog converter, converting it into an analog signal. The analog signal is then amplified by the intensity modulator's driver amplifier to a voltage or current level capable of driving the intensity modulator. The modulator array modulates the NxN light signals generated by the laser array and beam splitter array, achieving image information loading in the optical domain. These signals are then combined on the wavelength division multiplexer array to form N light signals. Simultaneously, the data processing unit transmits the encryption algorithm's encryption weight information to the digital-to-analog converter, converting it into an analog signal. The analog signal is then amplified by the NxN microring array's driver amplifier to a voltage capable of driving the microring array. The NxN microring array then modulates the N light signals generated by the wavelength division multiplexer array's combined beams, thus achieving image information encryption in the optical domain.

[0048] In terms of image decryption, a portion of the output ends of the aforementioned N*N microring array are connected to the input ends of the fiber array, enabling remote transmission of the encrypted image. The output ends of the fiber array are connected to the output ends of the detector array, which are connected to the input ends of the analog-to-digital converter, which are connected to the input ends of the processor. Specifically, the core key to image decryption is based on the weight matrix used during encryption. This can be calculated from the mapping relationship between the convolution kernel weights and output ports, the voltage-transmission correlation curve, and the N*N voltage matrix. The electrical signal generated by the detector array is converted into a one-dimensional digital signal using an analog-to-digital converter. In the processor, an intelligent algorithm processes the one-dimensional image result into a two-dimensional decryption result. Finally, the decryption result is returned to the computer, completing the decryption process of the encrypted optical image.

[0049] In the present invention, an intelligent control algorithm is equipped on the processor to control the intensity modulator array, N*N microring array and detector array in real time through the electrical port, so that the entire optical chip can work uninterruptedly around the clock, enhancing its encrypted data transmission capability and anti-interference ability.

[0050] Based on the above, the chip of the present invention has an optical signal transmission path and an electrical signal transmission path, wherein: The optical signal transmission path includes: The output end of the laser array is connected to the input end of the beam splitter array, the output end of the beam splitter array is connected to the input end of the intensity modulator array, the output end of the intensity modulator array is connected to the input end of the wavelength division multiplexer array, the output end of the wavelength division multiplexer array is connected to the input end of the N*N tunable microring array, and the output end of the N*N tunable microring array is connected to the input end of the detector array.

[0051] The electrical signal transmission path includes: The output end of the data processing unit is connected to the input end of the digital-to-analog converter, the output end of the digital-to-analog converter is connected to the intensity modulator module and the electrical ports of the N*N tunable microring arrays, the output end of the detector array is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected to the input end of the data processing unit.

[0052] The intensity modulator array is provided with a DC interface and a radio frequency interface. A digital-to-analog converter loads an electrical signal pre-processed by a data processing unit into the DC interface, causing the refractive index of the intensity modulator to change according to changes in the electrical signal. The N*N tunable microring array is also provided with a DC interface. A digital-to-analog converter loads an electrical signal pre-processed by the data processing unit into the DC interface, causing the refractive index of the microring array to change according to changes in the electrical signal. In the present invention, the intensity modulator array and the N*N tunable microring array transmit changing electrical signals of optical refractive index, which are analog data information.

[0053] The optical encryption processing chip based on a tunable microring array provided by the present invention loads the data to be processed, sent by a data processing unit, onto a signal light. A data encryption unit constructed based on an N*N microring array then encrypts the data to be processed on the signal light based on encryption weight information sent by the data processing unit, thereby obtaining an encrypted signal light. The optical encryption processing chip based on a tunable microring array utilizes a designed integrated transmission and calculation optical processing architecture to obtain on-chip optical domain encryption results in a single operation, meeting the growing demand for high-parallel computing. The chip is compatible with the control algorithm loaded on the data processing unit and controls the tunable microring array in real time through an electrical port, enabling the entire optical chip to operate uninterruptedly around the clock, enhancing its encrypted data transmission capabilities and anti-interference capabilities.

[0054] The present invention also provides a processing system, comprising the above-mentioned optical encryption processing chip based on the tunable micro-ring array.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An optical encryption processing chip based on a tunable microring array, characterized in that: It includes a light generating unit, a data loading unit, a data encryption unit, a data processing unit, a digital-to-analog converter, and an analog-to-digital converter. The data encryption unit is constructed based on an N*N tunable microring array, wherein: a light generating unit, configured to generate light beams of different wavelengths, split the N light beams of different wavelengths to obtain signal light, and input the signal light into the data loading unit; A data processing unit, configured to convert the initial data into digital data to be processed, and input the data to be processed into a digital-to-analog converter; A digital-to-analog converter, used for converting the data to be processed in a digital state into the data to be processed in an analog state; a data loading unit, configured to modulate the data to be processed in an analog state onto a signal light to obtain a modulated signal light, wherein the modulated signal light is loaded with the data to be processed, and to combine the modulated signal lights to obtain a first signal light; wherein the first signal light represents the signal light loaded with the data to be processed; a data encryption unit, configured to adjust the light refractive index based on the encryption weight information sent by the data processing unit, apply the light refractive index to the first signal light, encrypt the data to be processed on the first signal light, and obtain the second signal light; the second signal light represents the signal light with encrypted data, and collect external signal light, wherein the external signal light is the second signal light emitted by the N*N tunable microring array of the external chip; an analog-to-digital converter, configured to convert an external signal light in an analog state into an external signal light in a digital state; The data processing unit is also used to decrypt the external signal light in a digital state to obtain the decrypted data.

2. The optical encryption processing chip based on a tunable microring array according to claim 1, characterized in that: The data encryption unit includes N*N tunable micro-ring arrays and a detector array, wherein: N*N tunable microring arrays, configured to adjust a light refractive index based on encryption weight information sent by the data processing unit, and apply the light refractive index to the first signal light to encrypt the data to be processed on the first signal light to obtain a second signal light; the second signal light represents the signal light carrying the encrypted data; The detector array is used to collect external signal light, where the external signal light is the second signal light emitted by the N*N tunable micro-ring array of the external chip.

3. The optical encryption processing chip based on a tunable microring array according to claim 2, characterized in that: The N*N tunable microring arrays are composed of N*N cross-waveguide microring units, wherein the cross-waveguide microring unit is composed of a microring resonator and a cross-waveguide; the cross-waveguide is used to input the first signal light and output the second signal light, and the cross-waveguide includes two input ends and four output ends; the microring resonator is used to adjust the light refractive index based on the encryption weight information sent by the data processing unit, and apply the light refractive index to the first signal light, encrypt the data to be processed on the first signal light, and obtain the second signal light.

4. The optical encryption processing chip based on a tunable microring array according to claim 3, characterized in that: The detector array is provided with an electrical interface and a radio frequency interface. The digital-to-analog converter is used to load the electrical signal to the electrical interface so that the refractive index of the detector array changes according to the change of the electrical signal; the analog-to-digital converter is used to lead the external signal light in the analog state out of the radio frequency interface and convert it into the external signal light in the digital state to the data processing unit.

5. The optical encryption processing chip based on a tunable microring array according to claim 4, characterized in that: The data loading unit includes an intensity modulator array and a wavelength division multiplexer array, wherein: an intensity modulator array, configured to modulate the data to be processed in an analog state onto the signal light to obtain modulated signal light, wherein the modulated signal light carries the data to be processed; The wavelength division multiplexer array is used to combine the modulated signal lights to obtain first signal lights.

6. The optical encryption processing chip based on a tunable microring array according to claim 5, characterized in that: The intensity modulator array is composed of N*N intensity modulators, which are composed of any one of a Mahindra modulator structure based on electro-optic effect or thermo-optic effect, a micro-ring modulator structure, a micro-disk modulator structure and a photonic crystal structure; The intensity modulator array is provided with a DC interface and a radio frequency interface, and the digital-to-analog converter loads the electrical signal preprocessed by the data processing unit to the DC interface, so that the refractive index of the intensity modulator changes according to the change of the electrical signal; the N*N tunable microring array is provided with a DC interface, and the digital-to-analog converter loads the electrical signal preprocessed by the data processing unit to the DC interface, so that the refractive index of the microring array changes according to the change of the electrical signal.

7. The optical encryption processing chip based on a tunable microring array according to claim 1 or 6, characterized in that: The light generating unit comprises a laser array and a beam splitter array, wherein: A laser array, configured to emit optical signals of N different wavelengths; The beam splitter array is used to split N light beams of different wavelengths to obtain signal light, and input the signal light into the intensity modulator array.

8. The optical encryption processing chip based on a tunable microring array according to claim 7, characterized in that: The chip also includes an optical fiber array, and the output ends of the N*N tunable microring arrays are connected to the input ends of the optical fiber array for remote transmission of encrypted data; the output ends of the optical fiber array are connected to the output ends of the detector array, the output ends of the detector array are connected to the input ends of the analog-to-digital converter, and the output ends of the analog-to-digital converter are connected to the input ends of the data processing unit.

9. The optical encryption processing chip based on a tunable microring array according to claim 7, characterized in that: The chip also includes a monitor array. The output ends of the N*N tunable microring arrays are connected to the input ends of the monitor array. The output ends of the monitor array are connected to the input ends of the analog-to-digital converter. The output ends of the analog-to-digital converter are connected to the input ends of the data processing unit for real-time monitoring of the data encryption process.

10. A processing system, characterized in that An optical encryption processing chip based on a tunable microring array comprising any one of claims 1 to 9.

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