85 results about "Multimode interference" patented technology

The invention relates to the technical field of optical communication, and provides a polarization separation rotator and optical communication equipment. The polarization separation rotator comprises an input coupling waveguide, a conical waveguide, a phase difference introduction waveguide and a multi-mode interference coupler, wherein the input coupling waveguide, the conical waveguide, the phase difference introduction waveguide and the multi-mode interference coupler are sequentially arranged in the light propagation direction; the input coupling waveguide is used for coupling an input optical signal to the tapered waveguide; the input optical signal comprises two polarization modes; the narrow end of the tapered waveguide is arranged corresponding to the input coupling waveguide, and the wide end of the tapered waveguide is arranged corresponding to the phase difference introduction waveguide; the phase difference introduction waveguide is used for splitting the polarization mode into a polarization mode with a preset angle phase difference; and the multimode interference coupler is used for separating the optical signals in the two polarization modes so as to respectively transmit the optical signals to different output ports. According to the polarization separation rotator provided by the invention, the defect of low port isolation is solved, and the port isolation is improved while the wide-spectrum working bandwidth is realized.

The present invention provides a photonic integrated chip, a laser radar using the photonic integrated chip, and a detection method. The photonic integrated chip includes: a substrate, a first arrayed waveguide grating (AWG), a second arrayed waveguide grating (AWG), multiple multimode interference couplers (MIFs), multiple optical couplers (OFs), and a photodetector. The first arrayed waveguide grating (AWG) is used to split a transmitted laser signal to obtain multiple components of beamed transmitted signals; the MFIs are used to receive the beamed transmitted signals and transmit them to a target object to be detected, as well as receive reflected light spots and transmit them to the optical couplers. The second arrayed waveguide grating (AWG) is used to split a local laser signal to obtain multiple components of beamed local signals; the OFs are used to process the reflected light spots and the beamed local signals to obtain coupled signals; and the OFs are used to receive and process the coupled signals. This results in a photonic integrated chip for laser radars with a high chip integration density.

The application relates to the technical field of lasers, in particular to a semiconductor laser for a quantum gyroscope and a preparation method thereof. The semiconductor laser for the quantum gyroscope comprises a stacking structure, the stacking structure comprises an N-type substrate, an N-type cladding layer, an N-type waveguide layer, an active region, a first P-type waveguide layer and a waveguide structure which are stacked in a first direction in sequence, and the waveguide structure comprises a low-duty-cycle V-shaped groove grating, a multimode interference coupling beam splitting waveguide, a gain waveguide array, a multimode interference coupling beam combining waveguide, a high-duty-cycle V-shaped groove grating and a micro-tapered waveguide which are arranged and connected in a second direction in sequence. The application is favorable for realizing the semiconductor laser for the quantum gyroscope with high power and narrow linewidth under the premise of reducing the complexity of the device structure.

The present disclosure provides an optical module, comprising a light source, a coherent light chip and a controller, the coherent light chip comprising a first coupling port, a beam splitter set connected with the first coupling port, and a wavelength locker connected with an output end of the beam splitter set, the first coupling port being used for receiving local light generated by the light source, the beam splitter set being used for splitting the local light into multiple local light beams; the wavelength locker comprising two waveguides with different optical paths and a multimode interference coupler, the wavelength locker splitting one local light beam into two light beams, the two light beams being transmitted through the two waveguides and outputting at least two probe light beams with different phases by the multimode interference coupler; the controller acquiring optical powers of the at least two probe light beams, determining a wavelength of the local light according to the optical powers and a relationship curve of optical power and wavelength in the controller, and adjusting the wavelength of the local light output by the light source according to a wavelength difference between the wavelength of the local light and a preset wavelength. The present disclosure integrates the wavelength locker in the coherent light chip, thereby reducing the packaging complexity of the light source.

The invention discloses a lithium niobate eight-channel beam splitter capable of being used for an optical phased array. The lithium niobate eight-channel beam splitter comprises a silicon substrate, a silicon dioxide buffer layer, a lithium niobate core layer and a silicon dioxide cladding, the silicon dioxide buffer layer is attached to the silicon substrate, and the lithium niobate core layer is arranged on the silicon dioxide buffer layer; the silicon dioxide cladding is attached to the lithium niobate core layer and wraps the lithium niobate core layer; the lithium niobate core layer comprises an input section, a multi-mode interference coupling section and an output section which are connected in sequence, and the wide end of the input conical waveguide section is connected with one side of the multi-mode interference coupling section; and the wide ends of the eight output conical waveguide sections are connected with the other side of the multimode interference coupling section. The beam splitter is manufactured based on lithium niobate, is small in size, compact in structure, simple to process, large in manufacturing tolerance and high in product yield, and can realize uniform beam splitting in a working wave band.

This application provides a resonant modulator applicable to the field of optoelectronic information technology. The resonant modulator includes a substrate layer, a buried layer, a core layer, and an upper cladding layer. The core layer includes a multimode interference coupler and a connecting waveguide. The multimode interference coupler includes a multimode interference region and a main input port waveguide, a main output port waveguide, a feedback output port waveguide, and a feedback input port waveguide. The two ends of the connecting waveguide are optically connected to the feedback output port waveguide and the feedback input port waveguide, forming an optical feedback loop with the multimode interference coupler. An electro-optic modulation unit is associated with a first region of the connecting waveguide and is used to adjust the effective refractive index of the connecting waveguide by applying an electrical signal to change the resonant state of the resonant modulator. Based on the above structure, the sensitivity to coupling spacing and manufacturing errors can be reduced, and the device operating tolerance and modulation stability can be improved. This application also provides an optical computing system and a photonic integrated system.

The application discloses a bidirectional pumping quantum light source system, which comprises a multimode interference coupler, two asymmetric Mach-Zehnder interferometers AMZI1 and AMZI2 and a quantum light source. The input end of the multimode interference coupler is used for receiving pumping light. The first output end of the multimode interference coupler is connected with the input end of the AMZI1, and the first output end of the AMZI1 is connected with the first end of the quantum light source. The second output end of the multimode interference coupler is connected with the input end of the AMZI2, and the first output end of the AMZI2 is connected with the second end of the quantum light source, so as to form a Sagnac ring. The bidirectional pumping quantum light source system disclosed by the application utilizes the characteristics that the frequencies of pumping light and generated signal and idler photons are different in the spontaneous four-wave mixing process, embeds the asymmetric Mach-Zehnder interferometer with filtering effect into the Sagnac ring, and realizes the extraction of signal and idler photons in the Sagnac ring.

The invention relates to the technical field of multimode interference, and provides a central wavelength tunable multimode interference device which comprises an input waveguide region, a multimode interference region and an output waveguide region which are connected in sequence, the multimode interference region comprises a core layer, the core layer is made of a high-refractive-index material, and the output waveguide region is made of a high-refractive-index material. And a modulation electrode structure for modulating the refractive index of the core layer is arranged on the multimode interference region. The invention further provides a manufacturing method of the multimode interference device with the tunable central wavelength and a coherent modulator. Refractive index modulation is carried out on the core layer of the multi-mode interference area through the modulation electrode structure, in the multi-mode interference area, the effective refractive index directly determines the self-mapping point positions of different wavelengths, therefore, the effect of tunable central wavelength can be achieved through refractive index modulation, and through selection of different bias voltages, the tunable wavelength of the multi-mode interference area can be achieved. And the output effect of the optical power in the output waveguide is tuned.

The application relates to the technical field of optical fiber sensing, and discloses a miniaturized interrogator and a distributed optical fiber sensing system, which comprise a laser chip and an interrogator chip; the interrogator chip comprises a first optical port, a second optical port, a third optical port, a fourth optical port, a first polarization filter, a second polarization filter module, a selection switch, a beam splitter, a modulator, a polarization rotation beam splitter, a 1*2 multimode interference coupler, a first 2*4 multimode interference coupler, a second 2*4 multimode interference coupler, a first balanced detector, a second balanced detector, a third balanced detector and a fourth balanced detector. The integrated degree can be effectively improved, the system cost, volume and weight are reduced, the complex device coupling process is avoided, the production efficiency and consistency are improved, and the sensing performance is kept high.

The invention provides an optical mixer based on metasurface integration and a preparation method thereof, and belongs to the field of mixers. The mixer comprises a circularly polarized light beam splitter which comprises a first substrate, a liquid crystal structure, a second substrate and a nanorod array which are stacked in sequence; the nanorod array is used for separating the signal light and the local oscillation light into signal light left-handed rotation light, signal light right-handed rotation light, local oscillation light left-handed rotation light and local oscillation light right-handed rotation light; the liquid crystal structure is used for regulating and controlling the initial phases of the output left-handed light and right-handed light; the first multimode interference coupler is used for receiving and mixing the signal light left-rotation light output by the circularly polarized light beam splitter with the local oscillation light left-rotation light to obtain four paths of left-rotation polarized light components with different phases; and the second multimode interference coupler is used for receiving and mixing the right-handed light of the signal light output by the circularly polarized light beam splitter with the right-handed light of the local oscillation light to obtain four paths of right-handed polarized light components with different phases.

The application provides an electro-optical modulation structure, system, method and device, and the electro-optical modulation structure comprises: a first multimode interference coupler and a second multimode interference coupler, which are symmetrically arranged along a first direction and are respectively used for beam splitting and beam combining of light; a group of electro-optical modulation and light polarizers, comprising: a first electro-optical modulation and light polarizer and a second electro-optical modulation and light polarizer, which are symmetrically arranged along a second direction between the first multimode interference coupler and the second multimode interference coupler and are coupled based on surface plasmon polaritons, and are used for electro-optical modulation of the split light input from the first multimode interference coupler and output of the electro-optically modulated split light to the second multimode interference coupler for beam combining; and an extrinsic mode reflection structure used for connecting the first electro-optical modulation and light polarizer and the second electro-optical modulation and light polarizer. The scheme disclosed by the application reduces the area of integration of each device and is conducive to on-chip integration.

The invention discloses an optical switch device and a complex-valued optical neural network system, and belongs to the technical field of optical computing. The optical switch device is a two-input two-output device and comprises first to sixth waveguides, and first and second multimode interference couplers. Phase shifters are attached to the third waveguide and the fifth waveguide and / or the fourth waveguide and the sixth waveguide to form a group of configuration units which are used for loading real part and imaginary part data of a complex number. The phase shifter comprises a nonvolatile phase change material layer and a heating layer which are sequentially arranged from bottom to top, is used for realizing the function of the phase shifter, greatly reduces the static power consumption, improves the energy efficiency, is suitable for realizing the complex value optical neural network, and is also beneficial to large-scale integration. The complex-valued optical neural network system constructed based on the optical switch integrates input, calculation, reference and coherent detection modules, can synchronously complete amplitude and phase detection of optical signals, effectively supports complex-valued optical calculation, and has the advantages of low power consumption and high integration level.

The present invention discloses a four-mode mode division multiplexing / demultiplexing device based on Y-branching and multimode interference couplers. The device includes a four-mode multiplexer and a four-mode demultiplexer. The four-mode multiplexer and the four-mode demultiplexer multiplex four transmission modes through a four-mode bus waveguide. The four-mode multiplexer and the four-mode demultiplexer are mirror-symmetric structures, each composed of a dual-mode Y-waveguide, a four-mode Y-waveguide, a 2×2 single-mode input paired interferometer (MMI) type, and a 2×2 multimode input general interferometer (MMI) type basic unit. The present invention achieves four-mode multiplexing and demultiplexing by controlling the mode phase in the Y-waveguide and the MMI multimode coupler. The four-mode mode division multiplexer and demultiplexer have low loss, wide bandwidth, compact size, and wide manufacturing tolerance.

The invention discloses an ultra-compact reconfigurable light beam splitter based on reverse design, and the device comprises a multimode interference coupler which is realized based on a ridge waveguide and comprises a phase change material region, an N-type doped silicon waveguide and a P-type doped silicon waveguide, and the N-type doped silicon waveguide and the P-type doped silicon waveguide are arranged at the two sides of the phase change material region. The phase change material region is arranged on the ridge of the ridge waveguide and is obtained through reverse design; the metal electrode is used for applying voltage to the N-type doped silicon waveguide and the P-type doped silicon waveguide on the two sides of the phase change material area, so that the phase state of the phase change material in the phase change material area is changed; and the conical input waveguide and the conical output waveguide are arranged at the input end and the output end of the multimode interference coupler. The fixed light beam splitting mode of a traditional device is broken through, the light beam splitter integrates the optical regulation and control characteristics of the phase change material and the degree of freedom of a reversely designed structure, and an innovative solution with high dynamic range, low insertion loss and chip-level integration is provided for an optical interconnection system.

The invention provides an optical multimode interference coupler. According to the optical multi-mode interference coupler, the transmission waveguide of the slit structure is directly connected with the interface of the strip-shaped multi-mode waveguide, and based on the multi-mode excitation principle and the self-imaging principle of the multi-mode interference coupler, optical signals in the strip-shaped multi-mode waveguide are located at the interface in the slit single-mode waveguide; light splitting in the waveguide and transformation of a waveguide structure are completed at the same time, a traditional gradual deformation strip slit waveguide conversion structure does not need to be used, the length of an electronic component is effectively reduced, and the integration level of the device is improved. According to the invention, an input optical signal can be directly and equally divided into the two slit waveguides from the strip-shaped waveguide, and a traditional combined structure of first light splitting and then conversion is not needed. And the device has the advantages of small size, low loss, high bandwidth and the like.

The invention discloses an optical calculation multiplication structure and an optical calculation system, relates to the technical field of optical calculation, and aims to improve the optical calculation energy efficiency ratio and reduce the implementation difficulty of a photoelectric integrated structure. The optical calculation multiplication structure comprises a first multi-mode interference coupler, a second multi-mode interference coupler, at least two optical modulators, at least two optical waveguides and at least two switching devices. The input end of the first multimode interference coupler is used for coupling an optical signal; the output ends of the first multi-mode interference coupler correspond to the output ends of the second multi-mode interference coupler in a one-to-one mode, and each output end of the first multi-mode interference coupler is coupled with the corresponding input end of the second multi-mode interference coupler through the corresponding optical waveguide. The number of the output ends of the second multimode interference coupler is equal to the number of the input ends. The at least two optical modulators and the at least two optical waveguides are in one-to-one correspondence, each optical modulator is used for modulating an optical signal transmitted in the corresponding optical waveguide, and each optical modulator is coupled with an electric signal through a corresponding switching device.

The application discloses a kind of based on super surface rectangular waveguide mode conversion device and method, for realizing TE 10 -TE 20 -TE 01 Metal waveguide mode conversion, rectangular waveguide mode conversion device includes first to fifth section waveguide, and first to second super surface structure, wherein: first, third, fifth section waveguide is used to transmit rectangular waveguide TE 10 Mode, rectangular waveguide TE 20 Mode and circular waveguide TE 01 Mode, second, fourth section waveguide is used to generate multimode interference;First super surface structure is used to realize TE 10 Mode to TE 20 Mode conversion, second super surface structure is used to realize TE 20 Mode to TE 01 Mode conversion;Second section waveguide, first super surface structure and third section waveguide constitute TE 10 -TE 20 Mode converter;Fourth section waveguide and second super surface structure constitute TE 20 -TE 01 Mode converter.The application utilizes the regulation and control ability of super surface to electromagnetic field, and rectangular waveguide TE 10 Mode can be converted into circular waveguide TE 01 Mode in smaller space.

Structures for a power splitter that include a multimode interference coupler and methods of forming such structures. The structure comprises a multimode interference coupler including a grating having a plurality of grating lines, an input waveguide core, and an output waveguide core. The grating lines are disposed between the input waveguide core and the output waveguide core. The structure further comprises a resistive heating element adjacent to the grating lines.

The application discloses a graphene-coated surface saturable absorber device of a multimode optical fiber with an internal microstructure, which adopts a mixed structure of graphene and a graded-index multimode optical fiber. The saturable absorber device comprises a first single-mode optical fiber, a mixed structure based on a multimode optical fiber, and a second single-mode optical fiber. The mixed structure based on the multimode optical fiber is composed of a tapered graded-index multimode optical fiber with an internal microstructure and a single-layer graphene film. The graded-index multimode optical fiber is first subjected to a micro-tapering treatment, then a microstructure is inscribed in the core inside the taper waist, then the graphene film is coated on the surface of the taper waist of the optical fiber, and finally the single-mode optical fibers are fused at both ends of the multimode optical fiber. The saturable absorber combines the nonlinear multimode interference effect in the multimode optical fiber and the saturable absorption characteristics of graphene, can perform secondary compression on the pulse width of a high-energy pulse, and thus obtains an ultrashort pulse. The application has the advantages of a solid structure, strong stability, a high damage threshold and the like, and provides an effective technical means for obtaining a stable ultrashort pulse mode locking.

The invention discloses a multi-port optical switch based on a phase change material and nonvolatile regulation and control. Different combination states of the phase-change material units are realized by arranging the plurality of phase-change material units and by means of crystal form control of the phase-change material units, so that a transmission path of an optical signal in a multimode interference region is changed, full logic mapping of the optical signal at a plurality of output ports and input ports is realized, and the optical switch supports a 1 * N or M * N optical switch matrix. A plurality of basic units do not need to be connected in series or in parallel, so that high-integration-level implementation of an integrated circuit is facilitated, and a foundation is provided for subsequent large-scale extension. Meanwhile, the phase change material is adopted to regulate and control the multimode interference area of the optical switch, power consumption can be remarkably reduced, and the optical switch is suitable for long-term stable optical path configuration and has the advantages of being small in size, high in integration degree, high in switching rate and the like.

This application provides a lithium niobate thin-film MMI polarizer and beam splitter, comprising: a waveguide layer, a waveguide protection layer, and a silicon substrate; the waveguide layer includes: a proton exchange waveguide, an MMI, and a transition waveguide, which are integrated on the same lithium niobate thin-film chip; the transition waveguide has a double-layer tapered structure to meet the thermal insulation transmission requirements and is used for coupling between the proton exchange waveguide and the MMI; the MMI includes: an input waveguide unit, a multimode interference region, and an output waveguide unit; the input and output waveguides connected to the multimode interference region both adopt tapered structures to meet the thermal insulation transmission requirements; this invention solves the problem of efficient coupling between the proton exchange waveguide and the MMI and realizes the function of polarization and beam splitting.

The invention discloses a compact asymmetric multimode interference coupler hybrid reverse design method based on pixelated topological optimization, and belongs to the technical field of integrated photonic device design. The invention aims to solve the problems of difficulty in realizing any splitting ratio under a compact size, long design time and low efficiency in the design of the conventional asymmetric multimode interference coupler. According to the method, for a multimode interference coupler, a discrete model is established, and a corresponding two-dimensional binary matrix is used as an individual chromosome code; a fitness function of an individual is constructed through the port transmissivity obtained through three-dimensional finite difference time domain simulation calculation, and a genetic algorithm is adopted for optimization; after each generation of evolution is finished and a current global optimal individual is locked, a round of local search refining is carried out; and then traversing the topological structure based on the global optimal topological structure, determining boundary pixels of which the refractive indexes are suddenly changed according to the logical value difference between pixel points and neighborhood pixels thereof, generating a boundary pixel set, and performing boundary refinement.

This invention relates to the field of micro-nano optoelectronic device technology, specifically to a multi-stage end-face coupler for interconnecting optical fibers and on-chip photonic integrated devices, comprising a 3×2 multimode interference coupler, a connecting single-mode waveguide, and a 2×1 multimode interference coupler; the 3×2 multimode interference coupler includes three input tapered waveguides, a first multimode waveguide, and a dual-output tapered waveguide connected in sequence; the 2×1 multimode interference coupler includes a dual-input tapered waveguide, a second multimode waveguide, a single-output tapered waveguide, and a single-mode waveguide connected in sequence; the middle input tapered waveguide and the side input tapered waveguides are symmetrically distributed along the optical axis, and the first and second multimode waveguides include an interference region and a transition region, the width of which narrows along the direction of light propagation; this invention can reduce the transmission loss of the end-face coupler, increase the alignment tolerance, and reduce the fabrication difficulty.

The invention discloses a leakage mode suppression method of a thin film lithium niobate beam splitter. The beam splitter comprises a multimode interference coupler and a grating coupler. The multimode interference coupler is composed of an input waveguide, an output waveguide, an input conical waveguide, an output conical waveguide and a multimode interference coupling area. The grating coupler is composed of straight waveguides which are periodically arranged and have specific inclination angles. The grating couplers are symmetrically distributed on the two sides of the output waveguide of the multimode interference coupler, and the period of the grating meets the corresponding phase matching condition. Through optimization design of the grating structure, non-reciprocity interference signals are effectively filtered out, and propagation of a leakage mode in a plane and coupling between the leakage mode and a transmission mode are inhibited. According to the method, the influence of a leakage mode on the performance of the optical system is remarkably reduced, and a low-loss and low-leakage beam splitter structure is realized, so that the overall performance of the optical system is improved.

The utility model discloses an anti-crosstalk multimode interference coupler for an MZI (Mach Zehnder Interference) structure. The coupler specifically comprises a single-mode input waveguide, a multimode interference area waveguide, two single-mode output waveguides, two stray light output waveguides, two stray light interference area waveguides and two metal absorption areas, the metal absorption region, the stray light interference region, the stray light output waveguide, the multi-mode interference region waveguide and the single-mode output waveguide are connected in sequence, and the coupler is symmetric about the single-mode input waveguide.

The present application relates to the technical field of optical device design, and particularly relates to a VCSEL resonant cavity parameter prediction method and system for multimode suppression. The method comprises the following steps: obtaining surface relief microstructure data of a VCSEL resonant cavity, and performing adaptive spatial discretization according to the surface relief microstructure data to obtain relief grid data; performing mixed boundary condition setting according to the relief grid data to obtain mixed boundary data; performing in-cavity simulation according to the relief grid data and the mixed boundary data to obtain in-cavity simulation data; performing multimode interference analysis on the in-cavity simulation data to obtain multimode interference data; performing quantitative coupling according to the surface relief microstructure data and the multimode interference data to obtain a relief coupling prediction model; obtaining experimental simulation data, and performing optimization iteration according to the relief coupling prediction model and the experimental simulation data to obtain a relief cavity parameter prediction model. The present application realizes simulation of in-cavity mode distribution and multimode interference, and improves single-mode output stability.

The invention relates to the technical field of lasers, in particular to a semiconductor laser facing a quantum gyroscope and a preparation method thereof.The semiconductor laser facing the quantum gyroscope comprises a stacked structure, and the stacked structure comprises an N-type substrate, an N-type cladding, an N-type waveguide layer, an active region, a first P-type waveguide layer and a waveguide structure which are sequentially stacked in the first direction, the waveguide structure comprises a low-duty-ratio V-shaped groove grating, a multimode interference coupling beam splitting waveguide, a gain waveguide array, a multimode interference coupling beam combining waveguide, a high-duty-ratio V-shaped groove grating and a micro conical waveguide which are sequentially arranged in the second direction and connected. According to the invention, the high-power narrow-linewidth semiconductor laser facing the quantum gyroscope is realized on the premise of reducing the structural complexity of the device.

The invention relates to the technical field of optical fibers, in particular to a double-cladding single-mode strain optical fiber which comprises a fiber core, an inner cladding and an outer cladding, and a middle layer and a leakage layer are arranged between the inner cladding and the fiber core. The refractive index of the middle layer is lower than that of the fiber core, a refractive index barrier is formed, and a light field is limited from diffusing out of the fiber core; the refractive index of the leakage layer is equal to that of the fiber core, a leakage channel is provided for a high-order mode, the high-order mode cannot meet the total reflection condition due to the insufficient incident angle and can permeate into the leakage layer and be lost, only a fundamental mode (LP01) can be stably transmitted in the fiber core, and the phenomenon that when a laser and an amplifier carry out high-power laser output, the high-order mode is damaged is avoided. The invention solves the problem that the improvement of the laser power and the beam quality are limited due to the fact that the double-cladding single-mode strain optical fiber is easily influenced by nonlinear effects such as stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS), meanwhile, the problem of multimode interference is avoided, and the improvement of the laser power and the beam quality in the double-cladding single-mode strain optical fiber and the high stability and low mode field distortion of single-mode transmission are ensured.

This invention provides a monolithically integrated semiconductor master oscillator power amplifier laser, relating to the field of semiconductor optoelectronics technology. The laser comprises a master oscillator region and a power amplifier region integrated on the same substrate using standard semiconductor active region technology; the power amplifier region employs an active 1×1 multimode interference coupler structure; and the laser adopts a monolithically integrated structure. This invention can improve the problem of beam flattening, thereby facilitating coupling with optical fibers or waveguide devices, simplifying the system coupling process, and enabling large-scale production applications.

This invention belongs to the field of microwave antenna and RF front-end circuit technology, specifically relating to a broadband filter dielectric resonator antenna with wide harmonic suppression characteristics and a method for controlling its radiation characteristics. The method includes the following steps: obtaining an initial electromagnetic state parameter set and performing fundamental mode field distribution decoupling calculations; constructing an open-loop feeder partially coupled topology to generate a hybrid broadband response signal set; parsing the passband envelope and attenuation determination to map a folded open-loop resonator to generate lower stopband zeros; determining the harmonic frequency band energy density threshold to trigger a multi-topology notch filter to generate an upper stopband zero array; and compensating for phase group delay and gain flatness to output the converged final radiation state parameters of the antenna. This invention overcomes the problems of multimode interference between the feed network and the radiator, the inability to independently generate stopband radiation zeros, and nonlinear phase group delay shift caused by the lack of distributed notch filter node cooperative configuration.