162 results about "Polarization multiplexed" patented technology

The invention discloses an optical interconnection system on an optical chip and the optical chip, relates to the technical field of communication, and aims to solve the technical problem of low system data capacity in the wavelength division multiplexing technology in the prior art. The system comprises a micro-ring modulation device, a polarization combiner and a demultiplexer, the output end of the micro-ring modulation device is connected with the input end of the polarization combiner; the input end of the demultiplexer is connected with the output end of the polarization combiner; the micro-ring modulation device is used for performing signal modulation on TE0 polarized light and TM0 polarized light in the light source; the polarization combiner is used for combining the TE0 polarized light and the TM0 polarized light output by the micro-ring modulation device and outputting combined light; and the demultiplexer is used for decomposing the combined light into signals corresponding to a plurality of wavelengths. By combining the polarization multiplexing technology and the wavelength division multiplexing technology, the number of multiplexing channels of the optical interconnection system is multiplied, and the data capacity of the optical interconnection system is improved.

The invention discloses a design method for a metasurface non-staggered polarization multiplexing holographic display device, and the method comprises the steps: carrying out the phase analysis of an initial polarization detection signal according to a phase recovery algorithm, and obtaining phase analysis information; receiving an incident polarized light signal and an emergent polarized light signal to construct emergent light complex amplitude, and combining phase analysis information to obtain analysis parameters corresponding to all positions in the metasurface device; constructing corresponding structure-phase delay mapping according to scanning information obtained by scanning, and further performing matching mapping on the analysis parameters to obtain corresponding mapping information; according to the mapping information, microstructure geometric parameters of all positions in the metasurface device are restored, and metasurface device design information is obtained. According to the design method, the holographic display device capable of carrying out independent phase regulation and control on any three polarization states can be designed, and the limitation that a non-staggered metasurface can only aim at orthogonal polarization state regulation and control is broken through; moreover, high-spatial-resolution display imaging can be realized, and the imaging field angle is larger.

The invention discloses a method of an optical anti-turbulence device for polarization multiplexing spatial optical communication. The mode demultiplexer is connected with the optical fiber; the single-mode optical fiber array is respectively coupled with each spatial intrinsic mode decomposed by the mode demultiplexer; the polarization CBC chip is connected with the other end of the single-mode optical fiber array; the driving control module is connected with the polarization CBC chip; the polarization multiplexing optical communication digital coherent receiver (Rx) is connected with the polarization CBC chip through a single-mode optical fiber; through the arrangement of the polarization CBC chip, the compatibility of a polarization multiplexing technology and a mode multiplexing coherent beam combination technology is realized, the problem of polarization dimension information loss or strong crosstalk caused by the use of a polarization state rotator (PSR) and a polarization maintaining optical fiber in the prior art is solved, modulation information of two orthogonal polarization dimensions is completely reserved, the communication bandwidth is improved, and the communication efficiency is improved. And the communication efficiency is greatly improved.

The invention relates to the technical field of optical communication, and discloses a multi-dimensional and multi-phase-based 50G PON signal noise compensation method, which comprises the following steps: S1, generating a mixed signal, including superposing a multi-phase orthogonal pilot signal into a data signal time domain at a transmitting end according to a preset proportion lower than the power of a data signal; and S2, transmitting the mixed signal in a polarization multiplexing mode, wherein the polarization multiplexing adopts double-channel parallel transmission of an X polarization state and a Y polarization state. Multi-phase orthogonal pilot signals are superposed to a data signal time domain in a low-power proportion at a transmitting end, polarization multiplexing dual-channel transmission is adopted, a narrow-band filter is utilized at a receiving end to separate pilots and calculate channel damage parameters, and a finite impulse response filter is configured to perform linear equalization compensation. And the simplified Kalman filtering algorithm is combined to estimate the phase noise and correct the phase, so that collaborative suppression of the linear channel damage and the phase noise in the 50G PON signal is facilitated.

The invention relates to a broadband polarization multiplexing imaging metasurface which combines a newest machine learning algorithm and an advanced optical simulation technology and aims at achieving broadband high-definition and polarization multiplexing imaging effects. Meanwhile, the complete process of the metasurface from concept proposing to final design is elaborated, and by accurately developing machine learning model training and performing optical simulation verification, the polarization multiplexing far-field imaging metasurface in the same wavelength range is heart-shaped under x polarization and round under y polarization, and the metasurface is in the shape of the heart. It is ensured that the metasurface has excellent imaging performance in different polarization states. The innovative design not only improves the imaging quality, but also expands the application potential in various optical systems.

The invention discloses a wavelength and polarization multiplexing super-structure lens construction method based on a double-layer geometric phase, and provides a double-layer geometric phase super-structure surface theoretical model by using a super-structure based on an artificial micro-nano structure, and designs a lens structure of which two working wavelengths and two polarization modes can be regulated and controlled at will by using the model. The working principle of the double-layer geometric phase super-structure lens is elaborated; secondly, optimizing and screening unit structures of the single-layer super-structure lens, establishing a unit structure database, and designing a double-layer super-unit structure on the basis of the unit structures; and finally, a double-layer super-structure lens is constructed by using a super-unit structure, so that the double-layer super-structure lens works at two wavelengths and two polarization states, and the adjustable multifunctional characteristics of dual-wavelength switchability and polarization sensitivity are realized. The method has important application prospects in the fields of dual-wavelength polarization sensitive imaging, optical tomography, sensing, new energy automobile display systems, AR / MR display and the like.

The invention provides a reference light polarization multiplexing TF-QKD device and a coding method, and relates to the technical field of quantum communication. A light source emitted by a single-wavelength laser is subjected to time division multiplexing modulation through a phase modulator, an intensity modulator and a polarization modulator to obtain a strong phase reference light pulse, a weak phase reference light pulse and a quantum signal light pulse; after being attenuated by the optical attenuator, the signals are sent to a detection end through an optical fiber line; after light pulses of an Alice end and a Bob end received by a detection end pass through respective links, the light pulses are modulated by polarization controllers of respective light paths and then enter a light interference module for interference, the interfered light is divided into two beams, and the two beams respectively enter a first polarization beam splitter and a second polarization beam splitter for polarization; the light split by each polarization beam splitter respectively enters two avalanche detectors for detection, and the detection result is sent to a synchronous counter to ensure that the pulse arrival time of the Alice end is consistent with the pulse arrival time of the Bob end.

The invention provides a polarization multiplexing metasurface-based depolarization holographic method, which comprises the following steps of: describing a polarization state of light by using Jones calculation, and defining a propagation model of a wave; the pixel pitch of the metasurface and the height of the nanorod are determined, and a function between the length and width (l, w) of the nanorod and the modulation phase is obtained; a strict coupling wave analysis RCWA method is used, and electromagnetic response of the nanostructure is simulated under local period approximate LPA; fitting the libraries of phi xx and phi yy through a linear quadratic polynomial at each wavelength so as to represent a Jones matrix of the metasurface; introducing a noise function fnoise, applying the noise function fnoise to the metasurface, and calculating the complex amplitude of the metasurface by using an agent model; and establishing a joint optimization process, optimizing the metasurface geometric diagram and the SLM phase diagram, generating a focal length stacking hologram of the target image data set, and performing verification by using a CITL calibration model. According to the method, the image quality can be improved.

According to the indirect image encryption method based on the polarization multiplexing metasurface, the used phase gradient metasurface is composed of nanometer bricks with singular point characteristics and mirror image structures of the nanometer bricks, when left-hand circularly polarized light and right-hand circularly polarized light are incident, the corresponding structures of the nanometer bricks play a role respectively, two holograms are constructed in a far field, and polarization multiplexing is achieved; on the basis that two structures are arranged in the column direction to form a super unit, when x-ray polarized light is incident, light is subjected to non-abnormal reflection through the generalized Snell law, required RCP and LCP are filtered out, and emergent light is superposed to generate vector light; performing condition limitation on the azimuth angle of the vector light through a simulated annealing algorithm to obtain two encrypted patterns; the encrypted pattern needs to be obtained by analyzing the polarization of the emergent light to obtain a corresponding Stokes parameter and then constructing a decryption function related to the Stokes parameter for calculation and analysis; therefore, the metasurface for realizing polarization multiplexing and indirect encryption functions of incident light in different polarization states is constructed.

Disclosed in the present application are an on-chip integrated wavelength division multiplexer and a photonic integrated circuit chip. The wavelength division multiplexer comprises a polarization-insensitive flat-top wavelength division multiplexing structure, wherein the flat-top wavelength division multiplexing structure has a first input waveguide group, a second input waveguide group and an output waveguide. In the flat-top wavelength division multiplexing structure, odd-even grouping is performed on central wavelengths configured for the first input waveguide group and the second input waveguide group, optical signals of different groups are respectively input into the wavelength division multiplexer in different polarization states, and on the basis of a single polarization-insensitive flat-top wavelength division multiplexing structure, two groups of multiple optical signals of different wavelengths and in different polarization states are multiplexed into one multi-wavelength and polarization multiplexed light, thereby reducing signal crosstalk between adjacent channels, simplifying the structural complexity of the wavelength division multiplexer, reducing the size of the wavelength division multiplexer, and thus facilitating an improvement in the integration level of the photonic integrated circuit chip.

The application discloses a 3D printing multi-sector multifunctional metasurface and a design method thereof. The multi-sector multifunctional metasurface is designed based on five polarization multiplexing multifunctional metasurfaces with different phase control means, then the five metasurfaces are respectively faced to five different directions in space and integrated by using a 3D printing technology, and a multi-sector metasurface is formed. Finally, the designed multi-sector metasurface can integrate different electromagnetic functions in five directions in a 3D space. The application designs a polarization multi-sector metasurface based on the 3D printing technology. The polarization multi-sector metasurface can integrate electromagnetic functions of non-common polarization waves on a single device, and can complete wave front control in multiple directions in space, so that the electromagnetic wave control range is expanded from only transmission and reflection to multi-direction control, and the information capacity of the electromagnetic device and the space utilization rate of the wave front control are greatly improved.

A pump light generation unit of an optical amplifier pumping device outputs pump light with a single wavelength or a plurality of wavelengths from a plurality of output ports. A pump light multiplexing unit polarization-multiplexes or wavelength-multiplexes the plurality of pieces of pump light which has been output from the pump light generation unit. A polarization scrambler collectively polarization-scrambles the polarization-multiplexed or wavelength-multiplexed pump light which has been output from the pump light multiplexing unit and outputs the polarization-scrambled pump light to an optical waveguide for pump light. The optical waveguide for pump light inputs the pump light which has been polarization-multiplexed or wavelength-multiplexed by the pump light multiplexing unit to the pump light superimposition unit. A pump light superimposition unit multiplexes the polarization-multiplexed or wavelength-multiplexed pump light and signal light. A pump light output port superimposes the pump light on the signal light by outputting the pump light from the pump light superimposition unit to the gain medium so that the pump light propagates in the same direction as the signal light.

The invention discloses a compensation method and device with robustness under a polarization effect, equipment and a storage medium, belongs to the technical field of communication, and solves the problem that the robustness of a communication system is affected under the existing factors such as rapid polarization state disturbance. A compensation method with robustness under a polarization effect comprises the following steps that S1, a transmitting end processing module generates a polarization multiplexing signal, and a pair of pilot frequencies is inserted in each of two polarization directions of the polarization multiplexing signal to obtain a transmitting end signal; s2, sending the sending end signal to a receiving end digital processing module through a link with a polarization effect, extracting a damage matrix at an insertion position by the receiving end digital processing module according to the pilot frequency, and calculating differential group delay and polarization loss according to a channel matrix, and constructing a damage compensation matrix and completing compensation of the link with the polarization effect. The method provided by the invention has high robustness under the condition that polarization rotation and polarization mode dispersion are damaged in a polarization state.

The present invention discloses a chip architecture for optical communications, including a modulated transmitter and a balanced detector. The modulated transmitter is used to modulate a signal light source and transmit it along a signal optical path X and a reference optical path Y, respectively. The modulated transmitter is provided with a polarization combiner for polarization combining light II and light I that has undergone IQ modulation. In the balanced detector, a polarization beam splitter is used to receive and decompose the combined light. A local oscillator light source is used to perform 90° mixing with the decomposed light and transmit the mixing results to a photodetector array. The photodetector array is used to perform photoelectric conversion on the mixing results and transmit them to a coherent processor for coherent analysis. The present invention adopts a polarization multiplexing route architecture to design the chip, so that local oscillator light amplification can further reduce the bit error rate of the transmitted signal. The present invention also utilizes the second-order correlation of the light field to complete signal detection, while eliminating the effects of noise and low power introduced during local oscillator light amplification on signal detection, thereby broadening the application scenarios.

The invention discloses a polarization multiplexing metasurface design method and device for aspheric mirror shape and parameter simultaneous measurement, which can be used for simultaneously completing high-precision measurement of shape and parameters of an aspheric mirror in the same light path, and avoids the defects of multiple optical elements, complex and huge system, high difficulty in installation and adjustment and easiness in external interference in the traditional method. And the modulation area can be fully utilized to ensure the test resolution, and the integrated, lightweight and high-precision synchronous detection of the surface shape and the parameters is realized. The method comprises the following steps: (1) performing optical path modeling to determine a target phase; (2) carrying out target phase-based transformation; (3) establishing a metasurface unit library; (4) constructing a metasurface unit array: traversing a metasurface unit library according to the target phase after the basis transformation, and sequentially selecting unit parameters with the minimum difference between the actual phase and the target phase at each spatial position from the metasurface unit library; and (5) functional detection and optimization.

The invention discloses a visible light dual-wavelength polarization multiplexing metasurface hologram and a preparation method thereof, and relates to the technical field of micro-nano manufacturing. The super-surface hologram is composed of a super-atom array based on a nanoimprint technology, wherein the period of the super-atom array in the x direction and the period of the super-atom array in the y direction are 450 nm, and the height of the super-atom array is 800 nm. In the superatom array, all superatoms are of cuboid columnar structures, and a main body is composed of a polymer doped with titanium dioxide nanoparticles; the size and the position of each super atom are determined according to a GS algorithm; the GS algorithm is used for calculating the phase information of the target image under the polarized light with the corresponding wavelength; the wavelength polarized light comprises X polarized light of 532 nm and Y polarized light of 671 nm. According to the method, the problems of long manufacturing process period, small scale, high cost and the like of a traditional metasurface device can be solved, and a new development thought is provided for a multi-color imaging technology based on metasurface holography.

Disclosed is an optical transmitter that makes it possible to simultaneously realize the expansion of a limited band of a DAC and a simplified configuration. In the optical transmitter, the band expansion of an electrical region is limited to the double thereof, the result is combined with a band expansion of N times an optical region, and it is possible to omit multiplication clock circuits, large optical filters, and the like by means of specific digital signal processing. As a result of the simplified configuration, it is possible to provide an optical transmitter whereby a discretionary optical signal of which the band is extended 2N times beyond a limited DAC operating bandwidth is output. The specific digital signal processing includes filtering the following by a filter coefficient corresponding to the configuration of the optical transmitter: a digital division signal obtained by band division of a target signal to be generated; and a folded digital division signal of the digital division signal. The band expansion of the optical region can be flexibly expanded by means of the number of branches in an optical modulation unit. The present invention can also be easily applied to the generation of polarization-multiplexed light.

A kind of big depth of field light field near-to-eye display device and method based on polarization multiplexing.The device includes display screen, virtual image adjusting module, real image adjusting module, total controller, drive module, optional optical power compensation lens and optional diopter compensation lens.Via virtual image adjusting module and real image adjusting module respectively regulate virtual image and real world light, so that both are imaged in design distance after entering human eye, realize virtual and real confocal display;Total controller is used to generate multiple depth light field image, and according to the difference of light field image, control drive module output voltage, so as to adjust the focal length of the above two image adjusting devices;In the process of light field image switching, the voltage of drive module is synchronously adjusted.The present application can realize the clear fusion of multiple depth three-dimensional virtual image and real image by zero optical power design, has good imaging quality and visual comfort, and is suitable for augmented reality and other near-to-eye display scenarios.

The present application relates to the field of optical communication technology, in particular to a dynamic correction method of an adaptive polarization beam combination chip applied to an optical interconnection interface, comprising the following steps: S101, acquiring the group velocities of optical signals of a first optical path and a second optical path respectively, and transmitting the optical signal with a larger group velocity to a first time delay optical path for time compensation; S102, the time delay compensated optical signal enters a first power reconstruction optical path and a second power reconstruction optical path for power adjustment; S103, the power reconstructed optical signal enters a first phase matching optical path and a second phase matching optical path for phase modulation; S104, a chip monitoring end feeds back the integrated error of the time delay, power and phase of the optical signal, and if the integrated error is greater than a set error threshold, the method returns to step S101 for re-correction. The method compensates or modulates the time delay, power ratio and phase difference, realizes high synchronization and matching of two polarization lights, and thus improves the polarization multiplexing efficiency and signal quality of the whole system.

This disclosure provides a signal processing method and system for continuous-variable quantum key distribution, relating to the field of communication technology. The method includes: up-converting two double-sideband quadrature phase-shift keying (PSK) signals to a first center frequency and a second center frequency, respectively, to form a first quantum signal in the X-polarization direction and a first quantum signal in the Y-polarization direction; adding a first pilot signal in the X-polarization direction to the first quantum signal in the X-polarization direction to obtain a first optical signal in the X-polarization direction; adding a first pilot signal in the Y-polarization direction to the first quantum signal in the Y-polarization direction to obtain a first optical signal in the Y-polarization direction; using a polarization coupler to combine the first optical signal in the X-polarization direction and the first optical signal in the Y-polarization direction into a polarization multiplexed signal; and transmitting the polarization multiplexed signal to a receiver through a quantum channel. According to embodiments of this disclosure, the security key rate of continuous-variable quantum key distribution can be improved.

The invention discloses an achromatic metamaterial lens based on a long focal depth light beam and an imaging method, and the method comprises the steps: generating a zero-order Bessel light beam and a high-order Bessel light beam through a polarization multiplexing metamaterial lens, carrying out the imaging of an object, obtaining a zero-order image and a high-order image, subtracting the high-order image from the zero-order image, and obtaining a high-order image; and obtaining an achromatic image of the to-be-measured object. According to the invention, a large focusing depth of field is obtained through a conical phase, and then broadband imaging is obtained by using a focal depth overlapping region in a broadband, so that achromatic imaging of a visible light waveband is realized; the lens size is not limited, the area can reach the centimeter level or above, meanwhile, image blurring caused by side lobes is effectively eliminated through image subtraction, and the imaging quality is remarkably improved.

The invention discloses a dual-channel optical image authentication method based on a polarization multiplexing metasurface, and the method comprises the steps: firstly, calculating an authentication phase of a dual-channel plaintext image through employing a sparse constraint-driven authentication holographic algorithm; the method comprises the following steps: firstly, obtaining a target transmission phase and a geometric phase of a polarization multiplexing metasurface according to a composite phase regulation and control principle, then carrying out parameter scanning on a basic unit of the nano-column metasurface, establishing a transmission and geometric phase database, and finally determining structural parameters of each nano-column pixel by pixel, thereby completing construction of the polarization multiplexing authentication metasurface. And an authentication step: firstly, respectively illuminating the metasurface by using left-handed circularly polarized light and right-handed circularly polarized light to obtain a far-field diffracted noise-like image, then calculating nonlinear correlation distribution of the diffracted image and a plaintext image of a corresponding channel, and judging an authentication result of each channel according to whether the signal-to-noise ratio of the nonlinear correlation distribution reaches the standard or not. The method provided by the invention has the advantages of large authentication capacity, high authentication efficiency and no plaintext information leakage.

The invention discloses a full-polarization light-splitting type super-structure surface covering a mid-infrared broadband and a method of the full-polarization light-splitting type super-structure surface. The super-structure surface is formed by periodically arranging super-structure units, each super-structure unit comprises three groups of nano-structures used for regulating and controlling different cross-polarization, each group of nano-structures respectively control a pair of cross-polarization, each group of nano-structures comprises three anisotropic nano-columns, and the nano-columns of the three groups of nano-structures are arranged in a staggered manner. According to the invention, on the basis of the structural design of space polarization multiplexing, the independent regulation and control capability of the metasurface on the phase, amplitude and polarization state of a light field is fully utilized, the metasurface with polarization selective response is constructed, and the full Stokes polarization decomposition and focusing function of the mid-infrared broadband (3-5 [mu] m) is realized at the sub-wavelength scale; incident light in different polarization states can be respectively focused to different spatial positions, so that the polarization beam splitting efficiency and the imaging quality are remarkably improved, and the application of polarization information in complex light field detection and infrared imaging is promoted.

A polarization beam splitter includes an input port, first and second output ports, and a polarization splitting region coupled between the input port and the first and second output ports. The input port is adapted to receive guided optical signals that are polarization multiplexed, including a transverse electric (TE) optical signal and a transverse magnetic (TM) optical signal. The polarization splitting region includes a pattern of at least two materials having different refractive indexes. The pattern is shaped to demultiplex the TE and TM optical signals by directing a first power majority of the TE optical signal received at the input port to the second output port via asymmetrical power splitting while directing a second power majority of the TM optical signal received at the input port to the first output port via multipath interferometry.

A light source device includes a polarization multiplexing member including first and second regions, and a light source part. The light source part includes a first light source configured to emit a first laser beam having a first peak wavelength, a second light source configured to emit a second laser beam a second peak wavelength different from the first peak wavelength, a third light source configured to emit a third laser beam having the first peak wavelength, and a fourth light source configured to emit a fourth laser beam having the second peak wavelength. The first laser beam passes through the first region. The second laser beam passes through the second region. The third laser beam is reflected by the first region. The fourth laser beam is reflected by the second region.

The application discloses a thin-film lithium niobate-based electro-optic polarization modulator, characterized by comprising a first single-mode optical fiber, an input optical coupler, an electro-optic modulation phase shift region, an output double-waveguide vertical direct receiving coupler and a second single-mode optical fiber connected in sequence, wherein the modulated light enters from the first single-mode optical fiber, is coupled into the electro-optic modulation phase shift region through the input optical coupler, is coupled into the second single-mode optical fiber through the output double-waveguide vertical direct receiving coupler after being modulated in the electro-optic modulation phase shift region, and exits from the second single-mode optical fiber. The application is based on X-cut or Y-cut thin-film lithium niobate, the electric field of the electro-optic modulation region is along the Z-axis direction, the excellent electro-optic effect of lithium niobate material is effectively utilized, the electro-optic polarization modulator has the advantages of fast response speed, low driving voltage and low power consumption. Compared with the polarization multiplexing device with a length of hundreds of microns, the compactness of the structure is greatly improved, and the miniaturization of the device is facilitated.

The invention belongs to the technical field of optical fiber lasers, and discloses a multi-soliton-state adjustable optical fiber laser based on a time delay polarization multiplexing structure. The fiber laser comprises a laser pumping source, a wavelength division multiplexer, an erbium-doped gain fiber, a polarization independent isolator, a mode locking device based on a carbon nanotube saturable absorber, a polarization beam splitter, a polarization beam combiner and an output coupler which are sequentially connected through a single-mode fiber. A time delay polarization multiplexing structure of the optical fiber laser adopts a combination of a polarization beam splitter, a single-mode optical fiber and a polarization beam combiner, and the lengths of the single-mode optical fibers on two branches are obviously different. Therefore, traditional solitons conforming to independent mode locking of the long and short cavities can be output, and long-cavity or short-cavity-dominated master-slave soliton equally-spaced soliton beams and long-cavity and short-cavity periodic alternately-spaced pulse output can be generated. According to the invention, by introducing a time delay polarization multiplexing structure, the limitation of a traditional annular cavity is broken through, and a new solution is provided for the generation and dynamic regulation of multiple soliton states.

Disclosed in the present application are an on-chip integrated wavelength division multiplexer and a photonic integrated circuit chip. The wavelength division multiplexer comprises a polarization-insensitive flat-top wavelength division multiplexing structure, wherein the flat-top wavelength division multiplexing structure has a first input waveguide group, a second input waveguide group and an output waveguide. In the flat-top wavelength division multiplexing structure, odd-even grouping is performed on central wavelengths configured for the first input waveguide group and the second input waveguide group, optical signals of different groups are respectively input into the wavelength division multiplexer in different polarization states, and on the basis of a single polarization-insensitive flat-top wavelength division multiplexing structure, two groups of multiple optical signals of different wavelengths and in different polarization states are multiplexed into one multi-wavelength and polarization multiplexed light, thereby reducing signal crosstalk between adjacent channels, simplifying the structural complexity of the wavelength division multiplexer, reducing the size of the wavelength division multiplexer, and thus facilitating an improvement in the integration level of the photonic integrated circuit chip.

The present invention belongs to the field of polarization multiplexing technology and discloses a polarization tracking method, device and storage medium, including: at the communication receiving end, calculating the current polarization rotation state speed Δφ based on the received optical signal; flexibly configuring the pilot interval ΔL currently required by the MIMO equalizer according to Δφ; Rx ; Then, determine ΔL Rx The starting point in the received signal frame is used to achieve frame synchronization; after frame synchronization, the MIMO equalizer starts from the starting point and the interval ΔL Rx The method obtains pilot signals from the signal frame to calculate update coefficients for the MIMO equalizer, and then performs butterfly filtering on the received signal to achieve polarization tracking. It also includes comparing Δφ with a threshold and, based on the comparison result, selecting either an automatic polarization controller or a MIMO equalizer for polarization tracking. The present invention allows for flexible configuration of pilot signal spacing and polarization rotation processing methods, enabling high-dynamic range polarization tracking while reducing power consumption.