29 results about "Optical propagation" patented technology

This invention relates to an integrated laser packaging structure suitable for automated mass production, comprising a packaging box containing an upper cooler, a lower cooler, a laser chip assembly, an optical propagation assembly, an electrical connection assembly, a heat sink, and an optical fiber tail. The lower end face of the upper cooler has an upper coupling groove, and the upper end face of the lower cooler has a lower coupling groove and a first mounting groove, forming a coupling cavity. The heat sink is located within the first mounting groove, and the upper end of the heat sink has a second mounting groove, in which the laser chip assembly is mounted. A mounting assembly is fixedly installed within the coupling cavity. The position of each component within the packaging structure is predetermined, eliminating reliance on semi-automated testing and modulation during assembly, making it suitable for assembly line production. Furthermore, the use of a grooved cooler structure instead of the traditional sheet-like structure of a cooler allows the laser chip assembly and optical propagation assembly to be located within the laser-fiber coupling space formed by the grooves, resulting in better temperature control.

An apparatus and method for adaptively calibrating a splicer are described. The method comprises receiving a first image of a portion of a hollow core fiber, the hollow core fiber comprising a splice produced by the splicer, wherein the portion of the hollow core fibre in the first image is proximate to the splice. The first image is analysed to detect a feature associated with the first image, the feature representing a property of the portion of the hollow core fibre. Using the feature, an adjustment to be made to a parameter of the splicer is computed, wherein the adjustment is computed so as to target one or more of a reduced optical propagation loss and a higher strength, of a subsequent splice of hollow core fiber which is produced by the splicer after initiating the adjustment. The method further comprises initiating the adjustment of the parameter of the splicer.

The present invention provides a phase shifter that can be manufactured using a CMOS process, exhibits low optical propagation loss, can maintain refractive index changes without power supply, and allows for the resetting of those refractive index changes. [Solution] The phase shifter 100 of the present invention comprises an optical waveguide 101 composed of a core 105 and a cladding 106 surrounding the core 105, a substrate 102 on which the optical waveguide 101 is mounted, a heating means 103 for heating the core 105, and an ultraviolet irradiation means 104 for irradiating the core 105 with ultraviolet U, wherein the core 105 mainly contains silicon nitride, and the density of silicon dangling bonds of silicon nitride is 10 in terms of spin density 18 cm -3 The above 10 20 cm -3 The following applies:

The utility model provides a long-focal-length telephoto lens. The long-focal-length telephoto lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along an optical axis from an object side to an image surface, the first object side surface of the first lens is a convex surface, and the first image side surface of the first lens is a convex surface; the second object side surface of the second lens is a convex surface, the second image side surface of the second lens is a convex surface, the third object side surface of the third lens is a concave surface, and the third image side surface of the third lens is a concave surface; the fourth object side surface of the fourth lens is a convex surface, and the fourth image side surface of the fourth lens is a convex surface; and the fifth object side surface of the fifth lens is a concave surface, and the fifth image side surface of the fifth lens is a concave surface. The long-focal-length telephoto lens provided by the utility model is simple in structure and reasonable in design, the five lenses are combined, so that light rays are refracted through the plurality of lenses, the light rays are transmitted to the image chip on the image side surface, an image with high imaging quality is realized, the total length of the lens is shortened, and the use feeling of the lens is improved.

This application relates to a multi-plane optical conversion device and its design method, comprising: a phase modulation component, an optical path reflection component, and a beam splitter component. The phase modulation component includes N phase planes, where N≥1. The optical path reflection component is disposed on the optical propagation path of the phase modulation component and located at the end of the optical propagation path of the phase planes. The beam splitter component is disposed at the beginning of the optical propagation path of the phase modulation component. The device is configured to form a folded optical path, such that incident light enters through the beam splitter component, passes through the phase modulation component along a first propagation direction to reach the optical path reflection component, is reflected by the optical path reflection component, passes through the phase modulation component again along a second propagation direction, and is output by the beam splitter component. Each phase plane has the same physical phase profile in both the first and second propagation directions. This invention reduces the actual number of stacked physical phase planes while achieving the same optical field modulation effect.

The application discloses a phase recovery method based on single fractional Fourier transform amplitude observation, and comprises the following steps: S1, a near-field observation model based on fractional Fourier transform is established according to optical propagation theory; S2, corresponding single fractional Fourier transform amplitude observation information is obtained by simulation according to the established near-field observation model; S3, a phase recovery algorithm based on generalized alternating projection method is established, the single fractional Fourier transform amplitude observation information and signal prior information are taken as inputs, iterative calculation is carried out by using the phase recovery algorithm, and signal reconstruction is realized. The application has the advantages that the requirement of excessive dependence on oversampling or multiple observations is broken, the near-field propagation problem is described by combining a signal processing tool fractional Fourier transform, more accurate and efficient signal reconstruction is realized only from single amplitude observation, and the reconstruction quality is high.

A puncture path planning method and planning system. The puncture path planning method comprises: constructing a three-dimensional model from a medical image; defining organs and tissue as units having not completely identical light absorption degrees, and assigning light absorption coefficients to the units on the basis of whether a biopsy needle is allowed to pass through and the risk level of puncture; and setting a light source in a puncture target region, obtaining grayscale information on the skin surface by means of analysis of light absorption degrees along different paths, and using the grayscale information to feed back a recommendation degree for each puncture starting point. By converting the selection of a puncture path into the problem of finding an optimal puncture starting point, in combination with a light propagation principle, the novel puncture path planning method and planning system can intuitively display location information of a preferred puncture starting point and are more comprehensive and reliable.

This invention relates to a PMD optical propagation time sensor (22) for an optical distance measurement system, comprising an array of PMD optical propagation time pixels (21) having diode nodes (G) for channels A and B (A, B). a G b The PMD optical propagation time sensor includes: a plurality of shift registers constructed and connected to the pixel such that the two switches (S1, S2) can be switched alternately based on the respective registers (FF) in the register entries, wherein a plurality of columns or rows are at least partially assigned to the shift registers; and a switch matrix (80) designed such that the column lines (cola, colb) can be connected to one of a plurality of amplifiers (100), and the plurality of column lines (cola, colb) can be connected to a common amplifier (100). The optical propagation time sensor (22) is designed such that during the integration time period, the charge generated at the optical propagation time pixel accumulates at the diode nodes (diode a, diode b) and the connected column lines (cola, colb).

Gas detecting devices and in particular volatile substance sensors such as breath alcohol devices sensors. The semiconductor gas sensor device includes a laser structure and an optical waveguide resonator formed in a same compound semiconductor which includes at least one optical emission layer and one optical propagation layer. The optical waveguide resonator is formed in the optical propagation layer and is to its greater part separated from the remaining portion of the optical propagation layer. The laser structure is provided adjacent to a portion of the optical waveguide resonator and arranged to transmit electromagnetic radiation at a specific wavelength band to the optical waveguide resonator arranged to resonate at that specific wavelength band.

The invention relates to a photonic device (1) comprising a waveguide (10) in which light is dedicated to propagate along a main optical propagation direction (A), said waveguide comprising a central portion (10c) extending along the propagation direction. The device further comprises a phase change material (PCM) patch (20) disposed on the waveguide, wherein the PCM patch is dedicated to be heated. The device further comprises at least one heat sink (100) configured to drain heat from the PCM patch when heated, said heat sink being distinct from the central portion of the waveguide and having a thermal conductivity greater than or equal to that of the waveguide. Another aspect of the invention relates to a photonic system comprising said photonic device.

The invention relates to a light guide rod structure optimization design method and device and a medium, and the method comprises the following steps: constructing a TracePro simulation model, and simulating the spatial distribution and multipath optical propagation process of a partial discharge point light source based on the actual GIS device structure and material parameters; defining structural parameters of the light guide rod, performing parameterized structural modeling on the light guide rod, and constructing a multi-parameter joint optimization space; and based on a QAOA quantum optimization algorithm, taking the luminous flux, determined based on the TracePro simulation model, of the emergent end of the light guide rod as a target function, and performing optimal search of the structure parameter combination of the light guide rod. Compared with the prior art, the optical detection structure of the light guide rod can be efficiently and reliably optimized, and the capturing capability of the light guide rod on partial discharge optical signals in the GIS is remarkably improved.

To provide a processing state monitoring device that can improve the accuracy of detecting light from the processing surface during laser processing. [Solution] The processing state monitoring device according to the present disclosure is a device for monitoring the processing state in laser processing, which is performed by irradiating the processing surface of a workpiece with laser light, and comprises at least one photodetector that detects first light that is propagated from a molten region formed around the irradiation spot of the laser light on the processing surface and includes light of a different wavelength from the wavelength of the laser light, and an optical propagation correction element disposed between the processing surface and the at least one photodetector, wherein the optical propagation correction element receives the first light from the molten region and corrects the propagation direction of the first light according to the position of the molten region on the processing surface and emits it to the at least one photodetector.

The application discloses an optical waveguide and a near-eye display module. The optical waveguide comprises a plurality of periodically distributed grating units arranged along an optical propagation direction, and a grating line groove is arranged between two adjacent grating units. Each grating unit comprises at least a first grating part and a second grating part arranged along the optical propagation direction in sequence. The refractive index of the first grating part is not greater than the refractive index of the second grating part.

The embodiment of the application provides a kind of optical correlation calculation method and system based on light field inner product, belong to optical computing field.The method comprises: obtaining query vector and key vector;The query vector is optically encoded to generate query light field, and the key vector is optically complex conjugate encoding to generate key light field;The query light field and the key light field are loaded in different spatial regions of modulation plane according to preset spatial arrangement mode, and are introduced into corresponding spatial carrier frequency modulation respectively;Make multiplexed light field after loading propagate through optical propagation structure, and form light intensity distribution containing conjugate cross term on detection plane;Based on the light intensity distribution, the conjugate cross term is separated and extracted to obtain correlation response.The technical scheme of the embodiment of the application can reduce the electronic computing burden in correlation evaluation process, reduce system processing overhead, and improve the implementation capability of optical domain correlation information processing.

The invention belongs to the technical field of lasers. The invention provides an optical-mechanical thermal coupling analysis method for a laser under vibration and temperature disturbance conditions. The method comprises the following steps: establishing a laser three-dimensional structure model according to laser design parameters; establishing a laser optical performance calculation model based on the laser design parameters; establishing a finite element model for dynamic and thermodynamic analysis based on the laser three-dimensional structure model; applying vibration and temperature change boundary conditions to the finite element model and solving to obtain coordinate displacement data of the mirror surface and related optical elements; performing rigid body displacement and surface deformation separation and processing on the coordinate displacement data, and converting the processed data into a phase modulation matrix acceptable to a laser optical performance calculation model; importing the phase modulation matrix into a laser optical performance calculation model, and performing optical propagation and cavity mode performance simulation evaluation; according to the invention, full-link prediction from structural deformation to optical performance degradation of the laser is realized.

The invention discloses a reactor internal discharge fault simulation method and device based on optical propagation characteristics and electronic equipment. The method comprises the following steps: constructing a reactor simulation model based on a reflection coefficient of a reactor internal structure, an attenuation coefficient of transformer oil, actual arc discharge power, a standard arc fault position and a standard arc fault level; determining the illumination intensity and the light intensity distribution of the side wall of the reactor oil tank of the current reactor according to the simulation model; and determining an arc fault position and an arc fault level in the current reactor based on the illumination intensity and the illumination distribution. According to the invention, the optical characteristic of discharge in transformer oil and the optical signal propagation characteristic are taken as the basis for realizing the optical measurement method for the internal discharge fault of the reactor, so that the recognition speed and accuracy of the internal discharge fault of the reactor are improved, and the working stability and safety of a power system are improved.

The present application belongs to the field of optical communication, signal processing and micro-nano optical technology, and specifically relates to a multi-task optical diffraction neural network and a design method thereof. On the basis of a traditional diffraction neural network, the present application innovatively uses a phase-change material metasurface unit structure as a reconfigurable diffraction element; the phase modulation parameters are optimized through a deep learning algorithm to obtain the phase distribution of the multi-task optical diffraction neural network, and the corresponding metasurface unit structure is matched and selected from the constructed unit structure library according to the phase distribution to finally construct a phase modulation layer. In the running process, the dynamic reconfiguration of the multi-task function is realized by changing the crystallization state of the phase-change material and combining the switching of the incident light polarization state. In the process of optical propagation, the efficient processing of different image recognition tasks is realized by reconstructing the wavefront of the input image multiple times, and the problem of function solidification of the traditional diffraction neural network model when facing diversified tasks and data features is effectively overcome.

The invention belongs to the field of optical propagation, and particularly relates to a dynamic defocus adjusting system which comprises a first geometric phase liquid crystal device, a pixelated liquid crystal optical switch and a second geometric phase liquid crystal device, and the pixelated liquid crystal optical switch comprises a plurality of pixel-level liquid crystal optical switches. The pixelated liquid crystal optical switch comprises a first area and a second area corresponding to the first angle; when the pixel-level liquid crystal optical switch is powered on, the output light can fall on the retina of a viewer, when the pixel-level liquid crystal optical switch is not powered on, the output light falls in front of the retina of the viewer, and when eyeballs are located at a first angle, the pixel-level liquid crystal switch in the first area is controlled to be switched on; light entering the central area of the retina of the eyes of the viewer converges on the retina, the pixel-level liquid crystal switch in the second area is controlled to be switched off, light entering the surrounding area of the retina of the viewer converges in front of the retina, and then defocus stimulation is formed.

The invention relates to a system for distributing or recombining laser beams (SDL), comprising a reflective optical system (SOR2) which is mounted so as to rotate about an axis referred to as the main axis (APR) and parallel to an optical propagation axis (APE), referred to as the input axis, of a laser beam (FL), the reflective optical system comprising a cube corner-shaped structure having three mirrors (F1, F2, F3) which correspond to respective faces and are arranged to return the laser beam along an optical propagation axis (APS) referred to as the output axis and parallel to, but not coincident with, the input optical propagation axis (APE) and the main axis (APR); the reflective optical system being configured so that its rotation about the main axis (APR) leads to a parallel translation of the output optical propagation axis (APS) along a circular trajectory (T).

The invention discloses a multi-task integrated optical visual processing system and a preparation method thereof. A diffractive optical metasurface is used for carrying out random phase modulation on an input light field, and an optical propagation assembly is used for carrying out linear propagation transformation on the modulated light field; the image sensor is used for carrying out light intensity detection on the processed output light field, obtaining light intensity distribution characteristics and converting the light intensity distribution characteristics into electric signals to be output; and the electronic processing module is used for decoding the electric signal to complete a classification or regression type visual task. According to the scheme, a general optical computing architecture based on random phase projection is provided, high-density and high-parallel optical random projection and a low-parameter electronic decoder are integrated, an optical part does not need to be trained, high-precision and high-energy-efficiency processing is achieved in various machine vision tasks, and the high-precision and high-energy-efficiency processing is achieved. And an innovative path is provided for breaking through the bottleneck of traditional electronic calculation in speed and power consumption and realizing the practicability of a large-scale optical intelligent processing system.

The utility model provides a novel strip-shaped dodging highlight vehicle tracking lamp, which comprises a U-shaped lamp shell, a light source module, two light reflecting modules, a diffusion module, a light condensing module and two plugging structures, the light source module is arranged at the bottom of the U-shaped lamp shell, the two light reflecting modules are arranged on two side walls in the U-shaped lamp shell, the diffusion module is arranged between the two light reflecting modules, and the light condensing module is arranged on the two side walls in the U-shaped lamp shell. The light condensation module is arranged at the opening of the U-shaped lamp shell and seals the U-shaped lamp shell, the width of the light condensation module is larger than that of the diffusion module, and the U-shaped lamp shell and the light condensation module are inserted into the plugging structure after being assembled and are fixed through glue injection; light rays reach the diffusion module after being directly irradiated and reflected, and the light rays are homogenized through the diffusion module, then are directly irradiated and reflected and then are emitted through the condensation module. According to the light path combination, light rays emitted by the light source module are subjected to two optical propagation processes of dodging of the diffusion module and condensation of the condensation module, and finally, the line type of the emitted light rays is very uniform and bright; and the waterproof effect can reach IP67.

The invention relates to an adjusting method and device for improving the imaging resolution of a large-aperture telescope system, and the method comprises the steps: obtaining a dynamic surface type of the telescope system through an acceleration sensor, carrying out the optical inversion through the combination of the dynamic surface type and the propagation law of Fourier optics, and constructing an instantaneous point spread function of the system, and image deconvolution is carried out based on the point spread function so as to obtain an imaging effect with a higher resolution.

An optical propagation mode or multimode fiber demultiplexer may comprise an optical diffractive neural network (ODNN) configured to receive an optical signal exhibiting multiple optical propagation modes; to identify multiple optical sub-signals from the optical signal, each optical sub-signal representing an optical propagation mode; and to output the optical sub-signals separately.

Various example embodiments for supporting deterministic communications in communication networks may be based on use of a hybrid Programming Protocol-Independent Packet Processor (P4) deterministic switch. The hybrid P4 deterministic switch may include an electronic communication element configured to compensate for the jitter of incoming traffic to match a desired level of jitter for end-to-end deterministic communication of the incoming traffic and an optical communication element configured to support optical propagation of deterministic traffic received from the electronic communication element. The electronic communication element may include electronic packet queues, programmable electronic schedulers serving the electronic packet queues, and a P4 control element, where the electronic packet queues, the programmable electronic schedulers, and the P4 control element cooperate to support end-to-end deterministic communication of traffic based on control plane programming of the programmable electronic schedulers to serve the electronic packet queues in a manner providing end-to-end deterministic communication of the traffic.

This invention belongs to the field of magnetic sensors, specifically relating to an integrated diamond magnetic sensing system, including a waveguide chip, an optical propagation path, a diamond, a first detector, and a second detector. The optical propagation path is located within the waveguide chip and includes an input transmission optical path. One end of the input transmission optical path is connected to a light source, and the other end is split into two output transmission optical paths with a splitting ratio of 90:10 to 98:2. The output light from the low-power output transmission optical path directly enters the first detector to monitor the power of the incident light; the output light from the high-power output transmission optical path enters the diamond to excite fluorescence, and the second detector detects the fluorescence power of the diamond. This invention uses a chip-integrated solution to replace the traditional discrete optical platform solution, effectively achieving high-precision detection, improving spatial resolution, reducing equipment size, and ensuring system stability.

The present invention introduces an Optical Intrinsic Neural Network (OINN) for accurately measuring, aligning, modeling, and describing optical systems. This innovative approach combines neural network algorithms with traditional optical theoretical modeling, incorporating layers based on physical formulas. The OINN features optical propagation layers, modulator layers, and detection layers, each with parameters reflecting intrinsic physical meanings and incorporating noise models such as shot noise and thermal noise. The invention includes a method for training the OINN using a specially configured dataset to ensure precise alignment with true physical quantities. This facilitates accurate measurement, calibration, and simulation of complex optical systems, offering a cost-effective and precise solution to traditional challenges in optical system design and analysis.

An optical modulator that uses adiabatic tapers to change the width of the waveguides between multimode waveguides and single mode waveguides on a low-loss, e.g. thin-film lithium niobate, electro-optic platform. The architecture enables the utilization of the fundamental mode of multimode wide optical waveguides that have lower optical propagation loss without sacrificing the benefit of the signal integrity and ease of control of single mode operation.

A modular and manufacturable optical cross connect includes a plurality of subassemblies each including either of an array of collimators and an array of adjustable mirrors, wherein the plurality of subassemblies are configured to modularly scale a size of the optical cross connect, wherein the plurality of subassemblies are arranged relative to one another with an optical propagation region in between, and wherein the plurality of subassemblies with the array of collimators each include one or more probe ports configured to support an alignment signal for active alignment control.

An embodiment photonic device may include a first terminal including silicon and a second terminal including polysilicon. The first terminal may be configured as a first three-dimensional structure extending along a first direction and having a first U-shaped portion in a first cross-sectional plane perpendicular to the first direction. Similarly, the second terminal may be configured as a second three-dimensional structure extending along the first direction and having a second U-shaped portion in the first cross-sectional plane. The photonic device may further include a capacitor dielectric layer disposed between the first terminal and the second terminal and a cladding dielectric layer surrounding the first terminal and the second terminal. The first U-shaped portion and the second U-shaped portion may be arranged in an interlocking configuration having an overlapping region that is configured as an optical transmission line in which the first direction is an optical propagation direction.