182 results about "Waveguide array" patented technology

The invention discloses a calibration system in an active channel of a waveguide array phased-array antenna, and relates to the technical field of calibration in the active channel. Comprising a calibration judgment module, a waveguide directional coupling module, an amplitude-phase detection module and a digital domain optimization module, the calibration judgment module realizes intelligent triggering calibration through real-time monitoring of a multi-dimensional environment and performance parameters, and ensures that a calibration process is started only when the system state is deteriorated; the waveguide directional coupling module ensures that the calibration signal is accurately injected into each channel, and realizes cross polarization suppression through a polarization grid filter; the amplitude-phase detection module realizes high-precision measurement of amplitude, phase, group delay and polarization parameters of feedback signals of each channel by using superheterodyne and IQ demodulation technologies; and the digital domain optimization module calculates and updates the complex compensation weight of each channel through real-time digital signal processing and a self-adaptive algorithm, and realizes comprehensive and accurate calibration in combination with temperature-frequency interpolation and nonlinear pre-distortion compensation.

The invention relates to the technical field of semiconductor lasers, in particular to a multi-wavelength semiconductor laser. Comprising a semiconductor PN junction, and an inclined array waveguide region, a beam splitting MMI structure, a gain array waveguide, a beam combining MMI structure and a super-symmetric waveguide array which are sequentially arranged on the surface of the semiconductor PN junction in the longitudinal mode light beam transmission direction; the inclined array waveguide region comprises Bragg reflection gratings and inclined array waveguides, the Bragg reflection gratings are arranged on ridge surfaces of inlet ends of the inclined array waveguides, cavity lengths of waveguides in the inclined array waveguides are different, and the Bragg reflection gratings are parallel; seed sources output by the inclined array waveguide region are injected into the beam splitting MMI structure, and the seed sources are uniformly distributed and coupled into each waveguide of the gain array waveguide; the gain array waveguide is a parallel waveguide; the super-symmetric waveguide array is used for providing further gain to a fundamental mode and loss to a high-order mode. The antenna has the advantages of simple preparation, high gain, high single-mode performance, small size and high integration.

The invention relates to the field of millimeter wave radars, and discloses a 45-degree polarized array waveguide antenna for a millimeter wave radar, which comprises a metal groove layer; a slot array element layer; the slot array element layer and the metal slot layer are connected in a vertical lamination mode; the metal groove layer is provided with a plurality of radiation grooves; radiation grooves with the same number are formed in the metal groove layer at the corresponding positions of the slot array elements; the radiation slot indirectly increases the effective radiation aperture area of the antenna. The invention provides a method for solving the problems of low array pattern sidelobe, low gain and wide beam width of the N-element waveguide array antenna in a miniaturized application scene.

The invention discloses a femtosecond laser processing-based silicon optical chip-optical fiber coupled spot-size conversion chip and a preparation method thereof, the femtosecond laser processing-based silicon optical chip-optical fiber coupled spot-size conversion chip comprises a silicon optical chip, a spot-size converter and an optical fiber array, one end of the spot-size converter is aligned with the optical fiber array, and the other end of the spot-size converter is aligned with the silicon optical chip; preparing a waveguide in the waveguide layer in the quartz glass by using a femtosecond laser direct writing system; grinding the end surfaces of the cladding, the waveguide layer and the optical fiber by using abrasive paper with different mesh numbers in sequence, polishing by using a polishing agent, immersing in a beaker filled with absolute ethyl alcohol for cleaning, and drying after cleaning; and placing on a platform with a 45-degree inclination angle, and controlling the three-axis displacement platform to enable the femtosecond laser focus to scan in an end face coupling area of the optical fiber and the first waveguide array according to a designed path so as to obtain the thickness and the cross section width of the waveguide. According to the invention, the silicon optical chip and the optical fiber array can realize spot-matched optical signal transmission, the performance is reliable and stable, and the industrialization development of the silicon optical technology can be realized.

The invention relates to the technical field of optical sensing, in particular to a metasurface waveguide array based on a silicon carbide substrate and a spectrum sensing system. The system comprises a coupling modulation module, a waveguide transmission module and a spectral analysis module, the coupling modulation module realizes multi-physical field coupling modulation through a nonlinear coupling superposition principle of a thermo-optical effect and an electro-optical effect; the waveguide transmission module selectively activates waveguide channel combination based on a neural network prediction model and dynamically optimizes transmission parameters through an online reinforcement learning algorithm; the spectral analysis module performs environment compensation correction on the spectral characteristic parameters and outputs a corrected recognition result; according to the invention, multi-physics field coupling modulation, intelligent waveguide channel selection and environment adaptive compensation technologies are innovatively combined, the problems of insufficient precision and poor adaptability of a traditional spectrum sensing system in a complex environment are solved, and high-precision and adaptive spectrum sensing is realized.

A multi-unit wavelength selective switch (WSS) is disclosed. The WSS includes a plurality of WSS units, each WSS unit comprising a waveguide array for providing a light beam for propagation in the multi-unit WSS, and for receiving, in a wavelength-selective manner, the light beam propagated in the multi-unit WSS. A polarizing collimator splits each light beam into polarized collimated first and second sub-beams propagating in the multi-unit WSS along separate optical sub-paths. The polarized sub-beams of each light beam may be redirected by separate redirector arrays, e.g. liquid crystal on silicon (LCoS) arrays of a redirector array assembly specific to each light beam launched into the multi-unit WSS. Using separate redirector arrays to handle polarization sub-beams provides for a greater flexibility of optical configuration, allowing the use of inexpensive, off-the-shelf redirector arrays.

The invention relates to the related technical field of silicon photon chips, in particular to a high-speed silicon optical engine method and device for a silicon optical module, and the method comprises the steps: obtaining basic technical parameters of an optical fiber connection product with the silicon optical module; the refractive index distribution and the waveguide section size of the silicon optical waveguide are configured, and a multi-mode waveguide array is constructed; an electro-optical modulator array is integrated in a multi-mode waveguide array, and the coupling efficiency of waveguides and optical fibers is adjusted in real time through dynamic impedance matching; meanwhile, the high-speed electric drive circuit is used for driving the electro-optical modulator array and optimizing rising edge characteristics / falling edge characteristics of signals, and power consumption adjustment is carried out on the high-speed electric drive circuit. The technical problem that the optical signal quality is reduced due to the fact that the silicon optical waveguide design mostly adopts fixed parameters and mode crosstalk is prone to occurring in a high-speed transmission scene is solved, and the technical effects that the waveguide refractive index is dynamically configured, the multi-mode waveguide array is constructed, the mode crosstalk is effectively reduced, the transmission loss is reduced, and the optical signal transmission quality is improved are achieved.

The invention provides a path planning method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of path planning. The method comprises the following steps: acquiring environment information required by path planning; determining a Hamiltonian model according to the environment information; determining evolution time of quantum random walk based on a Hamiltonian model; and based on the evolution time and a Hamiltonian model, obtaining an evolution result of the photons after quantum random walking in the waveguide array, and determining an optimal path according to the evolution result. Due to the adoption of a quantum random walking mechanism, path exploration can be carried out in parallel in a quantum superposition state, so that a plurality of paths are searched and evaluated at the same time, and the calculation complexity of path planning is remarkably reduced; moreover, the quantum random walk can more effectively explore the global path space through the quantum interference effect, and the problem that a traditional algorithm is easy to fall into local optimum is avoided, so that the global optimal path is more accurately found, and efficient and global optimal path planning is realized.

We combine an array of waveguides having different lengths with a reconfigurable integrated optical network that allows full customization of the filter function after fabrication to provide optical filters. This customization can also optimize filter performance, compensating for fabrication errors or imprecision. This network can also self-configure automatically to the problem. Hence this approach provides a new class of compact, convenient, high-performance and highly customizable optical filters that are also suitable for mass manufacture on integrated photonics platforms.

The invention relates to the field of semiconductor lasers, in particular to a high-power narrow-linewidth hybrid integrated laser, which comprises a wide waveguide laser gain chip and a silicon-based external cavity photon chip, and is characterized in that the silicon-based external cavity photon chip comprises a tip multi-section edge coupler, a bus waveguide, at least three cascaded micro-ring resonators and a feedback assembly; the tip multi-section edge coupler comprises a tip waveguide array and a conical combined waveguide, the tip waveguide array is composed of inverted conical waveguides arranged side by side, and the width of the input end face of each inverted conical waveguide is smaller than that of the output end face of each inverted conical waveguide; and the width of the conical combined waveguide is gradually reduced from the input end to the output end. The invention solves the industrial problem that high power and narrow linewidth are difficult to consider in the hybrid integrated laser, has the advantages of high output power, extremely narrow linewidth, wide tuning range, high coupling efficiency, good process tolerance, high integration level and the like, and provides a high-performance light source for the next generation of coherent optical communication, laser radar and precision measurement system.

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 invention provides a laser array generating device and an addressing readout device, and the laser array generating device comprises a housing which is internally provided with a cavity; the conversion unit is located in the cavity and is suitable for obtaining n beams of target laser according to the initial laser, the first waveguide array chip is located in the cavity and comprises a first substrate and n first waveguides formed on the first substrate, the ith first waveguide in the n first waveguides is configured to transmit the ith beam of target laser, and the nth first waveguide is configured to transmit the nth beam of target laser. And n beams of target laser are output through the n first waveguides to form a laser array.

The application discloses a kind of curved waveguide array structure optical chip and preparation method thereof, applied to optical chip technical field: waveguide array structure and substrate;The waveguide array structure is prepared on the substrate;The waveguide array structure is a plurality of parallel composite curved track, the composite curved track is the circular arc bending that a plurality of periodic bends are formed, and the reconstruction period and reconstruction evolution process are discretely controlled by changing the period and amplitude of periodic bending in composite curved track.Light signal transmission evolution in waveguide array is controlled, and a new type of on-chip curved waveguide array structure that can realize light signal period reconstruction is proposed.The structure can realize the discrete regulation and control of light signal reconstruction period and reconstruction process, and is simple to prepare, has small bending curvature, is robust, and has potential application prospects in the field of light signal transmission and processing and super-resolution imaging.

The application discloses a kind of based on rectangular waveguide lens terahertz two-dimensional multi-beam antenna, including two-dimensional feed array, rectangular metal cavity and rectangular waveguide lens;Two-dimensional feed array includes first metal substrate, first metal substrate is provided with several rectangular waveguide feed units, each rectangular waveguide feed unit is connected with feed port;Rectangular waveguide lens includes second metal substrate, second metal substrate is provided with several rectangular waveguide phase shift units, and the rectangular waveguide phase shift units of adjacent row are mutually staggered distribution.The application is realized two-dimensional multi-beam scanning by the way of two-dimensional feed array bias feed, with the advantages of two-dimensional scanning angle and gain can be arbitrarily designed, large bandwidth advantage.The application adopts rectangular waveguide array to form metal lens, with the advantages of low high-frequency loss, small size;At the same time, through waveguide array staggered and period compression, mirror image grating lobe is eliminated, with the advantages of low grating lobe, large scanning angle.

The utility model discloses a slot waveguide array antenna attached to the outer side of an elastic wall. The slot waveguide array antenna comprises a protection base embedded in the elastic wall and an antenna substrate attached to the outer side of the elastic wall. The bottom of the antenna substrate is welded with a connecting socket, the connecting socket is inserted into the protection base, one side of the upper surface of the antenna substrate is provided with an inclined chamfer, and the upper surface of the antenna substrate is provided with slot guided waves. The utility model provides a detection antenna which is suitable for being used on a missile, can save the space of the whole missile, is high in performance and narrow in radiation pattern of a pitching surface, and in order to improve the available design space of the antenna, reduce the design difficulty and save the space of the whole missile, a transmitting-receiving antenna which is conventionally arranged on the inner side of the missile wall and is conformal with the missile wall is improved into a transmitting-receiving antenna which is attached to the outer side of the missile wall. The available design space of the antenna is increased to a great extent by arranging the antenna on the outer side of the missile wall, so that the design difficulty is reduced, the antenna performance is improved, and the whole missile space is saved.

The present disclosure relates to a radiation assembly, a waveguide antenna sub-arrays, and a waveguide array antenna. The radiation assembly for the waveguide array antenna comprises: a first radiation layer having a plurality of first radiation windows, each of the plurality of first radiation windows has a metal grid to divide the first radiation window into two radiation holes; and a second radiation layer having a plurality of second radiation windows, the plurality of second radiation windows correspond to the plurality of first radiation windows one to one, and the plurality of second radiation windows of the second radiation layer do not have any metal grid, wherein the thickness of the second radiation layer is greater than the thickness of the first radiation layer, and wherein the first radiation layer and the second radiation layer are manufactured independently of each other. The radiation assembly can enhance the polarization purity of the aperture radiation of the waveguide array antenna to which it belongs, so as to achieve a higher antenna cross polarization index.

The invention provides a control method and system of a reconfigurable optical phased array device. The control system comprises an MEMS micromirror array, a silicon-based waveguide array, a mode switching device and a controller, and the controller is configured to configure laser output parameters including a central wavelength, a tuning range and single longitudinal mode output control information, initialize the phase shifter position of each array element of the optical phased array, and control the phase shifter position of each array element of the optical phased array. Setting an initial deflection angle of the MEMS micromirror array and initializing a working state of the mode switching device; and receiving target scene information and judging whether the target scene information is changed or not, if so, generating a control instruction according to the target scene information, and controlling the optical phased array device according to the control instruction. The high integration of the optical system is realized by utilizing the high integration characteristic of the silicon-based optical chip and combining the design of the MEMS micromirror array and the mode switching device, and the overall performance and efficiency of the system are improved.

To provide an optical multiplexer that outputs a plurality of interference light beams having had the phase difference between signal light and reference light changed.SOLUTION: The optical multiplexer comprises: a first light branching delay unit for branching signal light and generating a plurality of branch signal light beams, as well as delaying the plurality of branch signal light beams so that the phase difference of the plurality of branch signal light beams to each individual signal light is differentiated; a second light branching delay unit for branching reference light and generating a plurality of branch reference light beams, as well as delaying the plurality of branch reference light beams so that the phase difference of the plurality of branch reference light beams to each individual branch reference light is differentiated; and a matrix type light waveguide array intersection unit in which intersections of each of a plurality of signal light waveguides which the plurality of branch signal light beams propagate and each of a plurality of reference light waveguides which the plurality of branch reference light beams propagate are arranged in a matrix form, and which multiplexes branch signal light entering each intersection with some of branch reference light beams to output interference light.SELECTED DRAWING: Figure 1

A beam-steering device (100) for spatial steering of a light beam comprises a waveguide array (10) being arranged on a substrate (50) and comprising a waveguide array input (12), multiple waveguides (14-1, 14-2, . . . , 14-i) and a waveguide array output (16), wherein the multiple waveguides (14-1, 14-2, . . . , 14-i) are adapted for simultaneously guiding light from the waveguide array input (12) to the waveguide array output (16) and for forming a light beam downstream of the waveguide array output (16) by superimposing the light guided by the waveguides (14-1, 14-2, . . . , 14-i), a phase shifter device (18) being arranged for applying controlled phase shifts to the light guided in each of the waveguides (14-1, 14-2, . . . , 14-i), and a grating array (22) including at least one patterned grating in optical communication with the waveguide array output (16), the grating array (22) being configured to radiate the light beam out of the beam-steering device (100) to a surrounding, wherein the waveguide array output (16) is arranged such that the light beam is formed downstream of the waveguide array output (16) with a main lobe and side lobes and with a beam angle Φ in a plane of the substrate (50), that is determined by the controlled phase shifts applied to the light by the phase shifter device (18) and a wavelength of the light, a slab propagation region (20) is arranged between the waveguide array output (16) and the grating array (22) such that the main lobe of the light beam is angularly relayed to the grating array (22) and the side lobes of the light beam leave lateral sides of the slab propagation region (20) before reaching the grating array (22), and the grating array (22) is arranged to radiate the light beam out of the beam-steering device (100) with a first angular direction with respect to the substrate (50), that is determined by the beam angle Φ. Furthermore, a method of beam-steering a light beam is described.

The present invention discloses a tunable filter based on a phase modulator array grating structure. Incident light is coupled to a first polarization rotation separator via a first end-face coupler, separating the incident light into two beams of orthogonal polarized light. The two beams of orthogonal polarized light are then split by a first power separator and a second power separator to produce first and second polarized light, respectively. These light is then transmitted forward and backward through a phase shifter-waveguide array, respectively. During transmission, phase modulation is performed by the phase shifter-waveguide array. The phase-modulated first and second polarized light are combined by a second power separator and a first power separator to produce third and fourth polarized light, respectively. The polarization states of the third and fourth polarized light are restored by a second polarization rotation separator to produce output light, which is then output through a second end-face coupler. Embodiments of the present invention achieve wide-range tunable filtering of light of a specific wavelength and are applicable to the field of filter technology.

An array waveguide diffraction grating (500) according to one aspect of the present disclosure comprises: a first slab waveguide (502); a second slab waveguide (504); and a waveguide array (506) having a plurality of waveguides that couple the first slab waveguide (502) and the second slab waveguide (504). In the waveguide array (506), at least one of the plurality of waveguides has a plurality of straight sections and a plurality of curved sections, and at least one of the plurality of curved sections has an S-shape.

The invention belongs to the field of semiconductor photoelectronics, and particularly relates to a broadband sub-wavelength 3D end-fire optical array structure based on positive and negative coupling, and the array structure comprises coordinates and planes: a right-hand rectangular coordinate system O-XYZ is established, the X axis is a light propagation main axis direction, and three planes perpendicular to the X axis are arranged on the X axis. Crosstalk generated by the positive coupling section can be reversely offset by the innovatively introduced negative coupling section, and the problem of near-field crosstalk between waveguides in a traditional high-density end-fire waveguide array is fundamentally solved. The beam directivity and phase consistency are guaranteed, the stability and reliability of the system are greatly improved, and the mechanism has theoretical expandability and is suitable for large-scale array expansion. By means of a three-dimensional positive and negative coupling waveguide array structure and an end-fire type output mode, the coupling behavior and the light beam convergence process are accurately regulated and controlled, and large-pitch-angle and large-azimuth-angle two-dimensional beam deflection is achieved.

The present invention discloses a 1×N arbitrary splitting ratio optical splitter and method. The optical splitter includes an input waveguide, a first-stage tapered waveguide, a second-stage tapered waveguide, a string-shaped waveguide, an array of receiving waveguides of varying widths, a gradient depth region, an oblique straight waveguide, a bend-compensating waveguide, an auxiliary waveguide, and a straight waveguide. The present invention not only enables all channels to output light with the same energy, but also enables arbitrary light output shapes by adjusting the length and width of the first-stage and second-stage tapered waveguides, as well as the width of the array of tapered receiving waveguides. The structure of the present invention can rapidly increase the number of output channels while maintaining the miniaturization of the overall chip. The introduction of the gradient depth region and edge auxiliary waveguides helps reduce the chip's insertion loss. Furthermore, by adopting a method of dividing the light distribution for stable transmission, the light intensity fluctuations output from each channel of the optical splitter can be kept very small within a large bandwidth.

The invention relates to a photonic device (1) comprising a glass substrate (S) incorporating an optical waveguide array. This array comprises at least one waveguide (Gc, Gi) which is able to propagate an optical mode and has a first portion flush with a face (Sa) of the substrate (S). The photonic device (1) also comprises a first layer, made of a material which is able to propagate radiation from the optical mode, arranged on the first face (Sa) of the substrate (S). The first layer at least partially covers the first portion of the waveguide. The first layer defines an optical pattern (M) which is configured to be optically coupled to the waveguide (Gc, Gi). Figure 1

The application provides a high-resolution on-chip integrated computing spectrometer based on a disordered slit structure, comprising an input waveguide module, a multimode scattering waveguide and an output waveguide array which are sequentially connected in the order of the light direction, the input waveguide module is provided with a slit focusing lens assembly and an electrothermal dimmer switch assembly, the multimode scattering waveguide is provided with a scattering disordered slit group, the scattering disordered slit group is composed of a plurality of parallel arranged scattering slits with the same width, random length within a set range and the same spacing, the length of the multimode scattering waveguide is greater than 10 times the width of the scattering disordered slit group, the width of the multimode scattering waveguide is greater than one or more times of the working wavelength of the high-resolution on-chip integrated computing spectrometer, and the output waveguide array is provided with a single-mode optical waveguide array composed of a plurality of single-mode optical waveguides. The application has the beneficial effects of being able to reduce the size, being able to realize precise regulation and control of the light output position by a small number of electrodes, and being able to improve the scattering disorder degree of the light wave in a limited size.

An optical interconnection assembly is proposed that includes a shroud that is positioned over a waveguide array component and configured to drive an initial, coarse passive optical alignment between a waveguide array and a fiber array. The assembly further includes releasable clamping mechanism that is positioned over the shroud and used to hold the fiber array in its final, precise aligned position as created by the use of mating alignment features. The use of a releasable force allows for the fiber array to be removed and replaced, as necessary.

A wavelength-selective optical switch includes in sequence a waveguide array, a polarization element, a collimating lens, a dispersing element, a Fourier lens, and a redirector array. The polarization element splits a light beam from the waveguide array into diverging polarization sub-beams in a first plane for collimating by the collimating lens. The dispersing element separates the sub-beams into spectral components in the first plane for the Fourier lens to focus them into the redirector array. The redirector array redirects the spectral components in a second plane perpendicular to the first plane to propagate back to the waveguide array. Sub-beams of each spectral component may be focused by the Fourier lens onto a location specific to each spectral component and common for both polarization components, for improving polarization performance of the wavelength-selective optical switch.

This application discloses a laser radar system for measuring atmospheric aerosols. The laser radar system for measuring atmospheric aerosols includes a light scattering receiving element disposed at the receiving end of a telescope in the laser radar system. The light scattering receiving element is an optical waveguide array having multiple optical waveguides with different light receiving surfaces in the light receiving direction. The light receiving surfaces have imaging receiving focal planes and fields of view corresponding to aerosol scattered light at different altitudes. The light scattering receiving element implemented in accordance with this application, when used in a laser radar system, allows laser radar signal beams scattered and returned at different distances to be focused at different focal planes and positions at the output end of the receiving telescope, allowing them to be effectively received, thereby obtaining complete atmospheric profile measurement data at different altitudes from low to high altitudes.

The invention provides an all-optical fast Fourier transform calculation implementation method and a photonic device. The method comprises the following steps: demultiplexing a time sampling vector based on a first array waveguide grating to obtain a parallel multi-wavelength signal; carrying out column-by-column phase modulation on the parallel multi-wavelength signals according to a discrete Fourier transform matrix based on a phase shift waveguide array to obtain weighted signals; and combining the weighted signals based on the second array waveguide grating to obtain an output optical signal. According to the method provided by the invention, a parallel multi-wavelength signal is obtained by demultiplexing a time sampling vector based on a first array waveguide grating; carrying out column-by-column phase modulation on the parallel multi-wavelength signals according to a discrete Fourier transform matrix based on a phase shift waveguide array to obtain weighted signals; and on the basis of the second array waveguide grating, weighted signals are combined to obtain output optical signals, the physical characteristics of high selectivity and low loss of an integrated photonic device are fully utilized, and efficient and high-fidelity Fourier transform calculation is realized in an integrated form with low structural complexity.

The application discloses an on-chip integrated light beam deflector based on a phase change material and a metasurface, and belongs to the light beam deflector field. After incident light is incident on the chip, the incident light passes through a silicon waveguide array, a voltage is applied to a phase change material layer through a pixel electrode layer, the refractive index of the phase change material between different pixels is different, the phase change material and a light outcoupling structure of the metasurface are coupled to perform pixelization modulation on light, and then light beam deflection in a direction perpendicular to the silicon waveguide array is realized. The emergent light is finally transmitted through a light-transmitting cladding and emitted to outside the chip. The application can effectively improve the dimension of light field regulation and control of an existing metasurface device or system.