119 results about "Waveguide array" patented technology

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.

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.

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 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.

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 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.

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.

Athermal arrayed waveguide grating structure that may operate as an optical filter including an input Silicon (Si) slab waveguide, an output Si slab waveguide, the input Si slab waveguide and the output Si slab waveguide optically connected by an arrayed group of Silicon Nitride (SiN) grating waveguides. Temperature insensitivity of the structure is achieved by locating output waveguide(s) of the Si output slab waveguide at / within a 10-degree angle offset from the center line of the output Si slab waveguide.

Systems and methods for manipulation of multi-phi-bit systems include tuning of logical phi-bit state vectors in an externally driven nonlinear array of acoustic waveguides via driver's phase. In particular, example systems navigate the Hilbert space of two logical phi-bits supported by an externally driven nonlinear array of coupled acoustic waveguides by parametrically changing the relative phase of the drivers.

The utility model provides a waveguide array antenna applied to a Ka frequency band, which comprises an upper layer waveguide power division network and a lower layer waveguide power division network, a plurality of square waveguide corrugated horn antenna units are arranged on the upper sides of the upper layer waveguide power division network and the lower layer waveguide power division network, and metal cross grids are arranged on the upper sides of the square waveguide corrugated horn antenna units. An orthogonal mode coupler is arranged between the square waveguide corrugated horn antenna unit and the upper-layer waveguide power division network, a directional coupler is arranged between the orthogonal mode coupler and the upper-layer waveguide power division network, and a bottom port of the square waveguide corrugated horn antenna unit is connected with a top port of the orthogonal mode coupler. The antenna has the advantages of low loss at a high frequency band, high gain, high efficiency and low profile, and has a good application prospect in satellite communication.

This invention relates to the field of optical sensing technology, and more particularly to a metasurface waveguide array and spectral sensing system based on a silicon carbide substrate. The system includes a coupling modulation module, a waveguide transmission module, and a spectral analysis module. The coupling modulation module achieves multi-physics coupling modulation through the nonlinear coupling superposition principle of thermo-optic and electro-optic effects. The waveguide transmission module selectively activates waveguide channel combinations based on a neural network prediction model and dynamically optimizes transmission parameters through an online reinforcement learning algorithm. The spectral analysis module performs environmental compensation correction on spectral feature parameters and outputs the corrected recognition results. This invention innovatively combines multi-physics coupling modulation, intelligent waveguide channel selection, and environmental adaptive compensation technology, solving the problems of insufficient accuracy and poor adaptability of traditional spectral sensing systems in complex environments, and achieving high-precision, adaptive spectral sensing.

The invention discloses an optical matrix multiplier, which comprises a laser light source, a grating coupler, a BTO electro-optical modulation array, an MZI waveguide array, a photoelectric detector array and a control unit, and is characterized in that the laser light source generates coherent light with stable wavelength, and the coherent light enters a BTO waveguide after being coupled by the grating coupler and then enters the MZI waveguide array through multi-stage beam splitting; the excellent electro-optical effect of a BTO material is utilized, phase modulation is achieved under electrode driving so as to load matrix element information, and then linear operation of matrix multiplication is completed through interference superposition of an MZI waveguide array. And the output optical signal is converted into an electric signal by the photoelectric detector array and is processed by the control unit to obtain an operation result. The system is compact in structure, high in modulation linearity, high in response speed, low in power consumption and capable of achieving multi-channel parallel optical calculation. Compared with a traditional silicon-based or lithium niobate modulator, higher integration density and stability are achieved, and the calculation efficiency of matrix multiplication in the fields of artificial intelligence, scientific calculation, signal processing and the like is remarkably improved.

The invention discloses a wearable flexible optical waveguide array sensing system and method, and belongs to the technical field of respiratory monitoring. A wearable flexible optical waveguide array sensing system comprises a flexible optical waveguide array sensing module attached to the thoracic and abdominal surface of a user, and further comprises a signal acquisition and processing circuit electrically connected with a signal and power supply interface of the flexible optical waveguide array sensing module; the flexible optical waveguide array sensing module comprises two oppositely arranged flexible circuit boards and a flexible optical medium layer arranged between the two flexible circuit boards, and the flexible circuit board on each side is provided with a plurality of optical sensing units arranged in an array; the flexible printed circuit board multi-layer packaging design is adopted, the device can be directly attached to the thoracic and abdominal surface to be worn for a long time without affecting the natural rhythm of respiration, the system integration degree is high, the size is small, power consumption is low, the device has the advantages of being high in precision, resistant to electromagnetic interference, high in real-time performance and the like, and the device is suitable for being used as a real-time sensing module in respiration rehabilitation training and exoskeleton control.

The invention discloses a compact broadband circular waveguide TM01 mode bending structure, and aims to solve the technical bottleneck that an existing circular waveguide TM01 mode bending structure is difficult to consider the aspects of bandwidth, structural compactness and power capacity at the same time. The antenna is composed of two circular waveguide TM01 mode power dividers, two E-plane U-shaped folded waveguide arrays and two E-plane rectangular bent waveguide arrays. The coaxial waveguide TEM mode and the multi-path rectangular waveguide TE10 mode are adopted as the middle transition mode of the antenna, and the problem of mode competition in a traditional bending structure is effectively solved. Meanwhile, by utilizing an E-plane U-shaped folded waveguide phase compensation technology, the length of each rectangular waveguide transmission path between the two circular waveguide TM01 mode power dividers is ensured to be consistent, the relative working bandwidth of which the transmission efficiency of a bent structure is greater than 95% is widened to be more than 40%, the power capacity is improved to the GW magnitude, and the distance between input / output ports is shortened to be within 5 times of the central wavelength.

The invention discloses a SiN-Si-SiN three-layer low-crosstalk waveguide array for an optical phased array. The SiN-Si-SiN three-layer low-crosstalk waveguide array comprises an upper-layer SiN waveguide, a middle-layer Si waveguide and a bottom-layer SiN waveguide. An SOI substrate in the array comprises a substrate silicon layer and a buried oxide layer, a SiN-Si-SiN waveguide layer is located above the buried oxide layer, and the upper layer of the SiN-Si-SiN waveguide layer is covered with SiO2. By designing waveguide width distribution, the mode matching degree between adjacent waveguides is reduced so as to reduce crosstalk between the waveguides, and a waveguide array with small spacing and low crosstalk is realized. The upper SiN waveguide layer and the lower SiN waveguide layer are arranged in a staggered mode, energy is transferred into the Si waveguide layers through interlayer coupling, crosstalk is further reduced, and meanwhile the smaller waveguide distance is achieved. The tail end of the SiN waveguide layer and the front end of the Si waveguide layer are subjected to tip treatment, and coupling loss is reduced. In addition, the advantages of low transmission loss of the SiN waveguide and high refractive index of the Si waveguide are combined, and low-loss optical transmission can be achieved while low crosstalk is achieved.

A method for fabricating an optical connector assembly that optically connects two optical waveguides is provided, comprising: 1) arranging that the terminal faces of the two optical waveguides are in a proximity and in contact with a volume of a photoactivable agent； 2) determining a three-dimensional geometry for each optical connector of the optical connector assembly based on three-dimensional coordinates of each end surface of the pre-determined light transmission channel in the two optical waveguides； 3) forming each optical connector of the optical connector assembly in the volume of the photoactivable agent via direct writing lithography (e.g. multiphoton lithography)； and optionally 4) forming a cladding that surrounds the optical connector assembly with a refractive index thereof smaller than each optical connector of the optical connector assembly. This method allows for in situ and integrated fabrication of optical connector assemblies and is applicable to multi / single-core or hollow-core fibers or waveguide arrays.

The embodiment of the invention provides an optical probability diffusion type image generation method and system, and the method comprises the steps: generating a random noise vector in an electronic domain, inputting the random noise vector into a pre-trained mapping network, and obtaining a drive signal through digital-physical mapping; a driving signal is input into the parallel waveguide array, and after light emitted by the injection light source enters the waveguide array, dynamic adjustment of the phase and amplitude of a light field is carried out; the injected light field is subjected to multi-dimensional light field regulation and control in the parallel waveguide array along a preset propagation direction through a multi-stage coupling-phase shift-attenuation composite structure unit, and complex amplitude distribution formed by superposing a plurality of waveguides is obtained when a preset regulation and control target is reached; and performing spatial filtering and projection processing on the complex amplitude distribution through an imaging system, and forming light intensity distribution for reflecting optical imaging on an imaging plane. By implementing the method, dual-channel collaborative diffusion and multi-modal image generation can be realized.

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.

A beam controller and a beam controlling method are provided. The beam controller comprises an optical phased array including a beam splitter and a waveguide array coupled to the beam splitter, a free-space beam combining area, and a shared grating transmitter. The beam splitter is configured to equally split an initial light beam into a plurality of sub-beams. The waveguide array comprises a plurality of waveguides arranged in one-to-one correspondence to the sub-beams. The waveguides are configured to receive and transmit the sub-beams. Transmission tail sections of the plurality of waveguides are concentrated in the free-space beam combining area in a fan shape manner. The free-space beam combining area is configured to enable the plurality of sub-beams to be combined on an image plane. The shared grating transmitter is configured to diffract and transmit a combined light beam that the plurality of sub-beams are combined on the image plane.

A waveguide array is configured to convey ultrasonic soundwaves. The waveguide array includes a plurality of waveguide elements. Each of the waveguide elements defines a proximal end configured to receive the ultrasonic soundwaves produced by the transducer and a distal end opposing the proximal end. A cross-sectional width of each of the waveguide elements is less than a wavelength of the ultrasonic soundwaves. An inward area of the waveguide array at the proximal ends of the waveguide elements is greater than an outward area of the waveguide array at the distal ends of the waveguide elements.