1050 results about "Waveguide" patented technology

The phase shifter of the present application includes a first waveguide for transmitting an optical signal; a second waveguide for transmitting an optical signal, which is arranged in parallel with the first waveguide; a first U-shaped waveguide for transmitting an optical signal, one end of which is connected to one end of the first waveguide and the other end of which is connected to one end of the second waveguide; a first heating electrode, which is arranged in parallel with the first waveguide; a second heating electrode, which is arranged in parallel with the first waveguide; a third heating electrode, which is arranged in parallel with the first waveguide; and a substrate, on which the first waveguide, the second waveguide, the first U-shaped waveguide, the first heating electrode, the second heating electrode, and the third heating electrode are formed, the first waveguide being located between the first heating electrode and the second heating electrode, and the second waveguide being located between the second heating electrode and the third heating electrode.

This invention belongs to the field of microwave passive device technology and discloses a dual-passband millimeter-wave filter power divider based on a gap waveguide, comprising a metal bottom cover layer and a metal top cover layer arranged from bottom to top; wherein, the metal top cover layer includes a top cover and a top cover frequency division structure disposed on the top cover; the metal bottom cover layer includes a bottom cover and a bottom cover frequency division structure, a filtering structure, and a power divider network structure disposed on the bottom cover. The dual-passband millimeter-wave filter power divider based on a gap waveguide provided by this invention solves the technical problems of existing dual-passband filter power dividers, such as high design optimization requirements, narrow dual-frequency bands, difficulty in flexibly changing frequency bands, and high processing requirements.

This application discloses a method and system for synchronous testing of metasurface grating waveguide performance, relating to the field of metasurface grating technology. The method includes polarization state modulation and spatial frequency encoding of multi-wavelength incident beams to obtain a modulated incident light field; coupling this modulated incident light field into the metasurface grating waveguide under test, which then undergoes total internal reflection to form the outgoing light field; acquiring a raw dataset of the entire light field, including Stokes polarization images and spatial spectrum images corresponding to each wavelength of the outgoing beam; calculating the total internal reflection hop count based on the Stokes polarization image; calculating the spatial step size offset based on the spatial spectrum image; and establishing a mapping relationship between the image pixel coordinates of the raw dataset and the internal physical regions of the metasurface grating waveguide under test to obtain local diffraction efficiency distribution data. This application solves the problem that traditional outgoing end intensity testing is difficult to trace to local defects inside the waveguide, achieving synchronous, high-precision quantitative characterization of local diffraction efficiency across multiple wavelengths.

This invention discloses a double-ridged waveguide semiconductor laser and its fabrication method. A first mask layer is formed on an n-type electrode, and a first strip-shaped window is formed within the first mask layer. An n-type ridged waveguide is formed within the first strip-shaped window. An epitaxial structure is formed on the surface of the n-type ridged waveguide. A second mask layer is formed on the surface of the epitaxial structure, and a second strip-shaped window is formed within the second mask layer. A p-type ridged waveguide is formed within the second strip-shaped window. A current spreading layer is formed on the surface of the p-type ridged waveguide. A p-type electrode is formed on the surface of the current spreading layer. The double-ridged waveguide semiconductor laser and its fabrication method of this invention yield a semiconductor laser with ridged waveguides at both ends, which can further enhance lateral optical field confinement and current confinement, and facilitates the fabrication of ridged waveguides with complex shapes, greatly simplifying the process and reducing costs.

In some embodiments, a near-eye, near-eye display system comprises a stack of waveguides having pillars in a central, active portion of the waveguides. The active portion may include light outcoupling optical elements configured to outcouple image light from the waveguides towards the eye of a viewer. The pillars extend between and separate neighboring ones of the waveguides. The light outcoupling optical elements may include diffractive optical elements that are formed simultaneously with the pillars, for example, by imprinting or casting. The pillars are disposed on one or more major surfaces of each of the waveguides. The pillars may define a distance between two adjacent waveguides of the stack of waveguides. The pillars may be bonded to adjacent waveguides may be using one or more of the systems, methods, or devices herein. The bonding provides a high level of thermal stability to the waveguide stack, to resist deformation as temperatures change.

A multicore optical fiber may include a common cladding comprising a radius R4 defining a glass portion of the optical fiber and having a cladding relative refractive index Δ4. At least two waveguides may extend through the common cladding. Each waveguide may include a core region, an inner cladding region, and a depressed cladding region. Each core region may include a maximum relative refractive index Δ1max. Each inner cladding region may include a relative refractive index Δ2. Each depressed cladding region may include a minimum relative refractive index Δ3min and a trench volume from 20-45%µm2 such that Δ1max>Δ2>Δ3min, and Δ4>Δ3min. A cable cutoff wavelength of each waveguide is ≤1150 nm. The co-propagating and counter-propagating inter-waveguide cross talk between each waveguide and a nearest waveguide is <-35 dB at 1310 nm and <-20 dB at 1550 nm for application lengths of 20 m. A mode field diameter of each waveguide is 8.2-9.0 µm at 1310 nm.

The application relates to the technical field of optical elements, in particular to a volume polarization grating and a preparation method thereof, an optical waveguide and a display device, which comprises the following steps: step 100: obtaining a liquid crystal cell; step 200: irradiating a photoalignment agent coating layer on the liquid crystal cell with light of a first wavelength to induce patterned orientation; and step 300: irradiating a premix in the liquid crystal cell with light of a second wavelength to make reactive mesogenic monomers polymerize and solidify, thereby forming a volume polarization grating. The application realizes time sequence decoupling and synergistic optimization of "orientation writing-structure locking" in a single processing flow, realizes process simplification and time sequence decoupling, has comprehensive advantages such as a more complete structure and more stable performance, and can effectively solve technical problems in existing PVG patterning processing, such as complex flow, mutual interference between orientation and solidification, and limited efficiency and consistency.

The application relates to the technical field of micro-nano machining, and discloses a kind of optical waveguide manufacturing template and its processing method, working template and diffractive optical waveguide manufacturing method.The optical waveguide manufacturing template includes template base and etching layer arranged on the surface of the template base, at least two groups of optical waveguide microstructures are arranged on the etching layer, and the depth of each group of optical waveguide microstructures is different.The thickness of the etching layer is configured to be able to meet the maximum design depth of each group of optical waveguide microstructures.The bottoms of different groups of optical waveguide microstructures are flush, and the tops are not flush.After implementing the technical scheme of the application, the technical problems of the prior art, such as complicated processing technology of multi-depth optical waveguide microstructure template, high overlay precision requirement, high manufacturing cost, low yield, low diffraction efficiency of depth microstructure due to imprinting residual glue during processing and poor display effect, are solved.

The application discloses a mode spot converter integrated based on a gradient refractive index waveguide and a two-dimensional inverted taper waveguide, which comprises a silicon substrate, a gradient refractive index waveguide, a silicon dioxide substrate, a two-dimensional inverted taper waveguide and a cladding, the silicon dioxide substrate, the two-dimensional inverted taper waveguide and the cladding are sequentially arranged on one side of the silicon dioxide substrate, and the gradient refractive index waveguide is arranged on the other side of the silicon substrate and is attached to the two-dimensional inverted taper waveguide; the opposite faces of the gradient refractive index waveguide are respectively provided with a first input port and a first output port, the long axis of the two-dimensional inverted taper waveguide is provided with a second input port and a second output port at both ends, and the first output port is attached to the second input port; incident light is incident from the first input port, is output from the first output port after being condensed by the gradient refractive index waveguide, is then incident into the two-dimensional inverted taper waveguide through the second input port for adiabatic transmission, and is finally output from the second output port and coupled with an integrated silicon waveguide.

A method of testing a semiconductor device. An apparatus comprising a semiconductor device and a testing apparatus. The semiconductor device comprises an integrated circuit and a plurality of external radiating elements at a surface of the device, the radiating elements comprising transmitting elements and receiving elements. The testing apparatus comprises a surface placed against the surface of the device. The testing apparatus further comprises at least one waveguide extending through the testing apparatus for routing electromagnetic radiation transmitted by one of the transmitting elements of the device to one of the receiving elements of the device. Each waveguide comprises a plurality of waveguide openings for electromagnetic coupling to a corresponding radiating element of the plurality of radiating elements located at the surface of the device. A spacing between the waveguide openings of each waveguide is greater than or less than a spacing between the corresponding radiating elements.

This invention belongs to the field of micro-nano technology and electron beam lithography application technology, specifically relating to a diffraction-based waveguide electronic beam exposure method and system that balances high speed with sub-nanometer writing field stitching errors. The method includes: designing a test pattern based on an AR waveguide structure and actual task exposure time; conducting exposure experiments based on the test pattern, testing and recording the stitching error values ​​at the writing field boundaries and four corner positions, and establishing a stitching error database under different writing field correction values; obtaining a coefficient matrix and initial error through polynomial fitting based on the stitching error database under different writing field correction values; and obtaining correction variables for preset design values ​​based on the coefficient matrix and the initial error, and correcting the exposure accordingly. This invention provides an easily implemented electron beam writing field pre-calibration method that can truly meet the dual requirements of high-precision and high-efficiency exposure in industrial production.

A head-mounted, near-eye display system comprises a stack of waveguides having integral spacers separating the waveguides. The waveguides may each include diffractive optical elements that are formed simultaneously with the spacers by imprinting or casting. The spacers are disposed on one or more major surfaces of the waveguides and define a distance between immediately adjacent waveguides. Adjacent waveguides may be bonded using adhesives on the spacers. The spacers may fit within indentations of overlying waveguides. In some cases, the spacers may form one or more walls of material substantially around a perimeter of an associated waveguide. Vent holes may be provided in the walls to allow gas flow into and out from an interior volume defined by the spacers. Debris trapping structures may be provided between two walls of spacers to trap and prevent debris from entering into the interior volume.

The optical device according to the present invention comprises: a lower electrode; a lower cladding on the lower electrode; a first input waveguide, a second input waveguide, a first distribution unit, a first output waveguide, a second output waveguide, a second distribution unit, a first core, and a second core which are on the lower cladding; an upper cladding which covers the first and second cores; and an upper electrode on the upper cladding. The first input waveguide, the second input waveguide, the first core, and the second core are connected to the first distribution unit. The first output waveguide, the second output waveguide, the first core, and the second core are connected to the second distribution unit.

The invention relates to a measurement system (10) of the MEMS and / or NEMs type comprising: a resonant assembly (RE) comprising a plurality of N indexed OMRi resonators i, at least one resonant mechanical element MEij coupled to each OMRi resonator, and at least one waveguide (WG) to which the optical resonators are coupled, an emission device (ED), an injection device (ID), each OMRi resonator of the resonant assembly being further configured to be excited at a mechanical excitation frequency (fex / o(i)) and to modulate the light beam associated with said first excitation frequency (fex / o(i)), a resonant mechanical element (MEij) being configured to be excited at a mechanical excitation frequency (fex / e(i,j)) and to modify an optical transmission or reflection in the vicinity of the optical resonance of said associated resonator, said modification being a function of a physical quantity (u) to be measured,at least one detector (Det) and a demodulation device (DDM) comprising a plurality of synchronous detection demodulation modules (11), referred to as LIA. Figure 11,

This application provides a self-injection-locked narrow-linewidth laser with a quasi-continuous locking region, comprising: a semiconductor laser source for generating an initial linewidth laser and outputting it via end-face coupling; a photonic integrated microcavity chip including a bus waveguide and a microring resonator coupled to it via an evanescent wave, for receiving the initial linewidth laser and providing feedback light to the semiconductor laser through Rayleigh backscattering of the microring resonator to excite a self-injection-locking effect; the microring resonator is a compact folded waveguide microcavity with an ultra-low free spectral range, the free spectral range of which is less than a preset threshold, so that when the driving current of the semiconductor laser is changed for wavelength tuning, the self-injection-locking regions of adjacent resonant modes in the cavity physically overlap or are closely spliced ​​in the current tuning parameter space, so that the semiconductor laser can continuously transition between adjacent modes without experiencing permanent unlocking during continuous current tuning, forming a quasi-continuous locking region.

A device, method, and hybrid computing architecture for a Symbolic Photonic Logic Gate (SPLG) system that performs data processing primarily in the optical domain. The system comprises a photonic substrate, including silicon-photonics, indium phosphide, or similar optically active materials, patterned with optical waveguides and interferometric structures configured to implement logic operations through controlled optical interference, phase modulation, or non-linear optical effects. The SPLG system is configured to execute Boolean and symbolic logic functions without requiring intermediate optical-to-electrical signal conversion. In operation, information is encoded into one or more optical parameters including phase, polarization, wavelength, or amplitude, and processed within a Symbolic Optical Core optimized for linear algebraic operations such as matrix multiplication and vector transformation. The architecture further comprises an electronic control layer configured to initialize, configure, and monitor the photonic logic elements while allowing the majority of computational operations to occur within the optical domain, thereby reducing electrical interconnect congestion and resistive heating relative to fully electronic processors.

This invention provides a telescopic millimeter-wave co-operated rock-breaking and coring drill bit and method based on pneumatic throttling drive, relating to rock-breaking technology. The drill bit includes: an annular cavity on the sidewall of the drill bit housing, with multiple through-hole waveguide windows at the bottom of the annular cavity; an annular piston, vertically slidable on the upper part of the annular cavity, with multiple throttling holes on the annular piston; a connecting sleeve, vertically slidable within the annular cavity and connected to the lower end of the annular piston, forming a movable air chamber between the connecting sleeve and the annular piston, with the throttling holes communicating with the movable air chamber; a waveguide disk, connected to the connecting sleeve at the upper part and with multiple waveguides at the lower end, each waveguide being movably inserted into a waveguide window; and an elastic element connecting the waveguide disk and the bottom of the annular cavity. The beneficial effects of this invention are: avoiding direct mechanical collision between the waveguide device and the rock, helping to reduce the risks of exposed and easily damaged waveguide end faces and jamming during downhole operations in existing technologies.

Aspects of the subject disclosure may include, for example, splicing optical fibers using a self-aligning optical fiber insertion connector. An optical fiber is supported between an optical fiber tool and a fiber aligning cavity, and the optical fiber tool is translated towards the fiber aligning cavity to engage the optical fiber. The optical fiber is separated into a first optical fiber segment and a second optical fiber segment by translation of the optical fiber tool. The first and second optical fiber segments are aligned with respective first and second optical waveguides by further translation of the optical fiber tool to obtain splices of the first and second optical fiber segments to the respective first and second optical waveguides. Other embodiments are disclosed.

Magnetostrictive displacement sensor, characterized in that it comprises a measuring head (1) and a measuring rod (2) which are connected to each other, and a slider (3) which is arranged on the measuring rod (2) and can move along the longitudinal direction of the measuring rod (2);wherein the measuring head (1) comprises a housing (11), a sensitive element assembly (12), a signal processing element (13), a pulse element (14) and an end cap assembly (15), wherein the end cap assembly (15) is detachably arranged on one side of the housing (11) facing away from the measuring rod (2), wherein the end cap assembly (15) and the housing (11) together form a receiving cavity (11a), wherein the sensitive element assembly (12), the signal processing element (13) and the pulse element (14) are all arranged in the receiving cavity (11a), wherein the sensitive element assembly (12) is electrically connected to the signal processing element (13) and the pulse element (14), wherein a waveguide wire (127) is arranged inside the measuring rod (2), wherein one end of the waveguide wire (127) is connected to the sensitive element assembly (12) is connected;wherein the magnetostrictive displacement sensor (100) further comprises a holder (16) comprising a first surrounding plate (161) and a second surrounding plate (162), one of the first surrounding plate (161) and the second surrounding plate (162) being provided with an insertion part, while the other being provided with a fitting part, the insertion part snapping into the fitting part, the first surrounding plate (161) and the second surrounding plate (162) enclosing a limiting groove, with at least a portion of the structure of the sensitive element assembly (12) being limited in the limiting groove, and wherein the signal processing element (13) and the pulse element (14) are each arranged on two opposite sides of the sensitive element assembly (12), and wherein the signal processing element (13) and the pulse element (14) are each in buffered contact with the inner side wall of the housing.

An apparatus for and a method of microwave heating of rotatable articles includes at least one microwave radiation source, at least one wave guide and a heating chamber for receiving a rotatable article which includes a material absorbing microwave radiation. Each microwave radiation source is connected to the heating chamber via at least one wave guide having at least one inlet in a lateral wall of the heating chamber. The heating chamber includes at least two covers in the form of an area defined by an inner and outer circumference. At least one cover is vertically slidable relative to the lateral wall of the heating chamber in combination with a stationary ring on the outer circumference of said area and at least one extendable portion on the inner circumference of said area. The method allows for direct and selective heating of the heated portion of the rotatable article.

This invention relates to the field of aircraft antenna technology, and discloses a low-tilt, wide-beam, high-gain, low-profile aircraft antenna, comprising a rectangular waveguide body, a radiating aperture, a beam modulation control, and a protective structure. The radiating aperture is the open end of the rectangular waveguide body, the beam modulation control is located at the radiating aperture, and the protective structure covers the rectangular waveguide body and the radiating aperture. The rectangular waveguide body is a highly compressed structure. This invention solves the problems of high beam tilt, narrow beamwidth, and low antenna gain commonly used in microstrip antennas for aircraft, and features low tilt, wide beam, high gain, and low profile, which can greatly improve the widespread use of low-tilt, wide-beam, high-gain, low-profile antennas in various aircraft.

The application relates to a two-stage refractive index gradient mode spot converter based on a metamaterial and a preparation method thereof, and belongs to the technical field of silicon light, wherein the converter comprises a silicon substrate, a buried oxygen layer located on the silicon substrate, a subwavelength grating waveguide structure and a solid waveguide structure located on the buried oxygen layer, and a gradient refractive index upper cladding layer located on the subwavelength grating waveguide structure and the solid waveguide structure; the subwavelength grating waveguide structure and the upper cladding layer can transversely and longitudinally amplify a mode field, can effectively reduce substrate absorption loss, and can increase alignment tolerance; by designing a subwavelength grating duty cycle and an upper cladding layer two-material duty cycle, the refractive index is gradually changed along the light propagation direction, the distribution of light field energy is better controlled, the light field is gradually expanded and adapted in space, the mode mismatch problem can be effectively avoided, and the design freedom is enhanced.

An optical waveguide structure and a manufacturing method therefor, and a head-mounted display device. The optical waveguide structure comprises: an optical waveguide substrate. The optical waveguide substrate comprises a grating region, and a grating structure in the grating region is composed of a cured imprint adhesive; and a non-grating region on the optical waveguide substrate other than the grating region is a glare suppression region, and the optical waveguide substrate in the glare suppression region is configured such that: a. there is no imprint adhesive on the surface, or b. there is an imprint adhesive on the surface, and a first glare suppression layer is further arranged on at least part of the imprint adhesive, the first glare suppression layer being used for reducing the reflectivity of the non-grating region of the optical waveguide structure.

This invention discloses a gapped waveguide circularly polarized antenna for vehicle-mounted millimeter-wave radar, relating to the field of antenna technology. The antenna includes an upper metal structure and a PCB substrate stacked below. The metal structure integrates a radiating layer, a slotted layer, and a resonant cavity layer enclosed by an electromagnetic bandgap structure and metal walls. The signal is fed in through the PCB chip port, via an E-plane waveguide and an E-H waveguide conversion structure, and then into the resonant cavity. This invention, by employing a longitudinally slotted stacked -45° tilted slot radiating element design, or in conjunction with a parasitic slot structure, can equally excite two orthogonal fundamental modes and control the phase difference, thereby achieving broadband circularly polarized radiation. This antenna adopts a single-layer metal integrated design, featuring low profile, high gain, and wide axial ratio bandwidth, and is easy to fabricate and integrate. It is particularly suitable for high-performance vehicle-mounted MIMO radar systems, effectively solving the problems of high high-frequency dielectric loss and complex circular polarization implementation in existing technologies.

This application discloses an electronic device, including a first metal plate, a second metal plate, and a first circuit board. The first metal plate is configured to support a display screen of the electronic device. The second metal plate and the first metal plate are oppositely arranged in a first direction, and the second metal plate is configured to support a rear cover of the electronic device. At least a portion of the first circuit board is located between the first metal plate and the second metal plate. The first metal plate includes a first opening, and the second metal plate includes a second opening. A projection of the first opening on the second metal plate at least partially overlaps the second opening. The electronic device according to this application can weaken coupling between a parallel plate waveguide and a microstrip line waveguide.

The application provides a V-shaped cavity narrow linewidth semiconductor laser chip and a preparation method thereof, and belongs to the technical field of semiconductor laser chip preparation. The chip comprises a chip body, wherein the chip body comprises a substrate layer, an N-type confinement layer, an N-type waveguide layer, a quantum layer, a P-type waveguide layer, a P-type confinement layer and an ohmic contact layer which are sequentially grown on the substrate layer; a V-shaped ridge waveguide comprises two ridge strips arranged in a V shape, the ridge strips are vertically arranged on the chip body and are composed of an unetched ohmic contact layer and an unetched P-type confinement layer; a Bragg grating is vertically arranged on one ridge strip; the two ridge strips of the V-shaped ridge waveguide are connected at the non-light-out cavity surface and are separated at the light-out cavity surface; a high-transmittance film layer is evaporated on the light-out cavity surface; and a high-reflection film layer is evaporated on the non-light-out cavity surface. The application improves the effective cavity length through the V-shaped cavity design, and realizes narrow linewidth, high output power and high side mode suppression ratio.

The application provides a manufacturing, packaging and testing integrated system and method of an optical communication storage module, and relates to the technical field of optical communication. The manufacturing, packaging and testing integrated system and method of the optical communication storage module comprises a manufacturing modeling module. Based on structure design data and manufacturing process parameters of the optical communication storage module, a multi-physical field joint modeling method is adopted, and through digital twin mapping, the optical device mounting state, the optical waveguide alignment deviation and the storage chip welding stress are cooperatively modeled to generate a manufacturing coupling model representing the optical-electric-storage coupling relationship in the manufacturing stage. By cooperatively introducing the structure design data and the manufacturing process parameters, and uniformly modeling the optical device mounting state, the optical waveguide alignment deviation and the storage chip welding stress in the manufacturing stage, the optical, electric and storage related factors form a quantifiable correlation in the same calculation framework.

A light incidence structure is configured to guide light into an optical waveguide medium layer having at least a first main surface for light incidence. The light incidence structure includes a light introducing medium and a light emitting source, wherein at least part of the light introducing medium is formed on the first main surface of the optical waveguide dielectric layer by curing, such that at least part of the light introducing medium is a part of the optical waveguide dielectric layer; the light introducing medium has at least one incident surface for light incidence; light emitted by the light emitting source enter the light introducing medium through the incident surface; and the light enter the optical waveguide dielectric layer from the first main surface after being refracted by the light introducing medium.

Provided in the present disclosure are a silicon photonics wafer test apparatus and a test method therefor, and a silicon photonics wafer test system. The silicon photonics wafer test apparatus comprises a camera assembly and a deflection optical path assembly; a prober for carrying a silicon photonics wafer; a fiber coupling module; and a driving assembly. When the driving assembly moves the silicon photonics wafer into the imaging field of view of the camera assembly, the camera assembly is adjusted such that the coordinate system is parallel to scribe lines of the silicon photonics wafer; when the driving assembly moves the deflection optical path assembly into the imaging field of view of the camera assembly, the camera assembly captures lateral images of a fiber end from at least two different directions via the deflection optical path assembly. The fiber coupling module is used for adjusting the pose of the fiber end on the basis of the lateral images and the direction of the coordinate system of the camera assembly, enabling initial alignment between the fiber end and the silicon photonics wafer. The present disclosure reduces the operational difficulty of alignment coupling between the fiber end and a silicon photonics waveguide, thereby simplifying the apparatus structure and reducing apparatus costs.

This invention provides an improved electro-optic modulator for optical integrated circuits (PICs). [Solution] An electro-optic modulator for an optical integrated circuit includes a substrate, a first waveguide on a first portion of the substrate, a second waveguide on a second portion of the substrate, and a first electrode in contact with the first waveguide, wherein the first waveguide includes a first electrode located between the first electrode and the first portion of the substrate, and a second electrode in contact with the second waveguide, wherein the second waveguide includes a second electrode located between the second electrode and the second portion of the substrate.