97 results about "Optical propagation" patented technology

The invention discloses a puncture path planning method and system, and aims to quickly calculate optimal puncture path information based on optical and computer rendering thoughts so as to provide reference for medical staff and provide an auxiliary means for clinically acquiring information. The method comprises the following steps: constructing a three-dimensional model through a medical image; the method comprises the following steps: defining organs and tissues as units with incompletely same light absorbance, and assigning light absorption coefficients to each unit according to whether a biopsy needle is allowed to pass or not and the risk degree of puncture; a light source is arranged in a puncture target area, gray information of the skin surface is obtained by analyzing the light absorbance on different paths, and the gray information is used for feeding back the recommendation degree of each puncture starting point. According to the method, selection of the puncture path is converted into searching of the optimal puncture starting point, a brand-new concept of planning and recommending the puncture path is provided by combining the optical propagation principle, and the position information of the optimal puncture starting point can be visually displayed and is more comprehensive and reliable.

The invention discloses an underwater image de-scattering method, system and device for scattering field decoupling in the technical field of underwater optical imaging and computer vision, and the method comprises the steps: calculating an intensity graph and a scene linear polarization degree graph according to an obtained multi-scale underwater image; according to the intensity image, performing image signal decomposition by using a dynamically constrained background light separation model to obtain a background scattering component and a target feature component; according to the scene linear polarization degree map and the background scattering component, calculating fusion transmissivity according to a non-linear optical transmission equation; carrying out noise suppression processing on the fusion transmissivity by adopting a double-constraint optimization architecture to obtain the fusion transmissivity subjected to noise suppression processing; and performing image reconstruction through a reverse optical propagation model according to the fusion transmissivity and the target feature component subjected to noise suppression processing to obtain a scattering-removed underwater image. The method effectively breaks through the dependence of a traditional method on the uniform hypothesis of a scattered field, and provides high-precision visual restoration support for an underwater detection task.

The invention discloses a wavefront detection-free adaptive optical correction method and system, and the method comprises the steps: obtaining a real in-focus image and a real out-of-focus image of a to-be-corrected light beam, and outputting an updated deformable mirror control voltage through a physical information neural network; generating a predicted wavefront phase according to the deformable mirror control voltage signal and a deformable mirror voltage-phase mapping model; generating a predicted in-focus image and a predicted out-of-focus image through a derivable Fourier optical propagation model; constructing a label-free composite loss function according to the real in-focus image, the real out-of-focus image, the predicted in-focus image and the predicted out-of-focus image; performing unsupervised training updating on the physical information neural network according to the composite loss function, and performing repeated iteration to obtain an optimized deformable mirror control voltage; and driving the deformable mirror to carry out self-adaptive optical correction in real time according to the optimized deformable mirror control voltage to obtain a correction result. According to the invention, the correction efficiency and the system stability are obviously improved.

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 application belongs to the technical field of spectral detection, and particularly relates to a light-weight LIBS online detection device and method with automatic focusing, wherein the device sequentially comprises a photoelectric switch, a pre-detection system, a controller, a delay timer, a pulse laser, a mirror, a zoom unit, an ellipsoidal mirror, a displacement adjustment platform, a transmission window sheet, a fiber coupling unit, a spectrometer and a signal strength detector according to a control logic and an optical propagation path. The application can easily realize zooming through the synchronous movement of the ellipsoidal mirror and the fiber coupling unit driven by the zoom lens and the displacement adjustment platform, can adapt to objects with different heights and shapes, solves the problem of large movement load in the zooming process, realizes light weight, and can judge the focusing range in advance through the telecentric lens imaging pre-detection system, so that the detection analysis efficiency is improved.

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:

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.

An embodiment photonic coupler may include a first input waveguide, a second input waveguide, a first output waveguide, a second output waveguide, a coupling region in which electromagnetic fields associated with two or more of the first input waveguide, the second input waveguide, the first output waveguide, and the second output waveguide are overlapping with one another, and an electro-optic device in the coupling region that includes an index of refraction that is a first function of an applied voltage. The coupling region may have an effective coupling length, along an optical propagation direction, which is a second function of a product of a physical length of the coupling region multiplied by the index of refraction of the electro-optic device. A mixing ratio of electromagnetic energy transferred between the input and output waveguides, due to evanescent coupling, may be controlled by adjusting the voltage applied to the photonic coupler.

The invention relates to the technical field of channel modeling, and particularly discloses a circular pipeline electric field reconstruction method and device based on mirror image method ray tracing and a medium, and the method comprises the steps: building a multi-path model through a mirror image method, setting the radius a of a circular pipeline, the coordinates # imgabs0 # of a transceiver at any position in the circular pipeline and the reflection frequency i, all propagation paths of a geometrical optical propagation model in a two-dimensional polar coordinate system are obtained, the electric field intensity is calculated, the circular waveguide function is calculated, the intensity component of each mode of the circular waveguide at different positions is calculated, the intensity component of each mode of the circular waveguide is calculated, the intensity component of each mode of the circular waveguide is calculated, the intensity component of each mode of the circular waveguide is calculated, the intensity component of each mode of the circular waveguide is calculated, the intensity component of each mode of the circular waveguide is calculated, the intensity component of each mode of the circular waveguide is calculated, the intensity component of each mode of the circular waveguide is calculated, and electric field reconstruction is carried out to obtain field distribution E 'Rx (rho, phi, z) at any position in the circular pipeline. According to the method, a geometrical optical model related to circular reflection is established and combined with a circular waveguide model, electromagnetic wave propagation characteristics between point sources at any position can be obtained, and fluctuation of path loss under the multi-mode condition can be explained.

The present disclosure relates to a photonic chip (10) comprising a first optical propagation element (11) and an optical resonator (12) for optically coupling the first optical propagation element (11) to a second optical propagation element (13). The second optical propagation element (13) may be external the photonic chip (10) or a part of the photonic chip. The first optical propagation element (11) comprises a first material with a first refractive index that is higher than a second refractive index of a second material of the second optical propagation element. An optical coupling efficiency of above 99% can be achieved.

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.

A structure includes a substrate, a waveguide, a layer, and a heating assembly. The waveguide has a first thermal conductivity and a light propagation axis. The layer has a second thermal conductivity lower than the first thermal conductivity. The heating assembly is operable to heat the waveguide and modify a refractive index of the waveguide. In a cross-section perpendicular to the light propagation axis, a portion of the heating assembly is positioned between the waveguide and the substrate and is separated from the substrate by the layer.

This communication system comprises: an aggregation station that transmits and receives a first training signal using an optical signal of a first wavelength, and transmits and receives a second training signal using an optical signal of a second wavelength; an optical propagation path that propagates the first training signal and the second training signal; and an extension station that transmits a first downlink wireless signal to a wireless terminal on the basis of the first training signal propagated from the optical propagation path, transmits a second downlink wireless signal to the wireless terminal on the basis of the second training signal propagated from the optical propagation path, and simultaneously transmits the first training signal and the second training signal to the optical propagation path on the basis of a first uplink wireless signal and a second uplink wireless signal simultaneously received from the wireless terminal.

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.

It is provided a photonic multi-level device 1 comprising: a. a waveguide 11 into which light is dedicated to travel along a main optical propagation direction 10, b. a phase change material patch 12, hereafter PCM patch, on the waveguide 11, c. an electro-thermal switching 13, e.g., a heater, in the vicinity of said PCM patch 12, wherein at least one among the waveguide 11, the PCM patch 12 and the electro-thermal switching 13 has a cross-section that varies along the main optical propagation direction 10. Thus, the present invention deals with novel designs for photonic multi-level devices that permit to modify in a compact, multi-level, reliable, and controllable way the device optical response.

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 utility model discloses an optical waveguide and a near-to-eye display module, and the optical waveguide comprises a plurality of grating units which are arranged in the light propagation direction and are distributed periodically, a grating wire groove is formed between every two adjacent grating units, and each grating unit at least comprises a first grating part and a second grating part which are sequentially arranged in the light propagation direction. The refractive index of the first grating part is not larger than that of the second grating part.

An optical communication method comprises modulating an optical carrier (OC) by both first and second electrical signals to provide an optical dual signal (S) comprising quantum (Sq) and classical (Sc) signals, first (Dq) and second (Dc) data being encoded in the first and second signals respectively; transmitting and receiving said dual optical signal (S) to and from an optical propagation medium; extracting the first and second signals from the received dual signal; compensating in the extracted first signal and from the extracted second signal: a frequency mismatch (Δf) between a central frequency of the optical quantum signal and a local oscillator optical wave (LO); a phase mismatch (Δφ) between the optical carrier and the local oscillator wave; and decoding the first and second data from the compensated first signal and the extracted second signal respectively.

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 the technical field of optical computing, in particular to a fully reconfigurable universal intelligent optical computing chip architecture and system. The framework comprises a transmitting module used for performing beam splitting on each kind of first single-wavelength light in first broadband light corresponding to a target task to obtain and transmit at least one single-wavelength beam splitting light set; the receiving module is used for receiving the at least one single-wavelength beam splitting light set and carrying out matrix calculation on the at least one single-wavelength beam splitting light set according to the optical propagation matrix corresponding to the target task to obtain second broadband light after light calculation, the single-wavelength beam splitting light sets are in one-to-one correspondence with rows in the optical propagation matrix, and the rows in the optical propagation matrix are in one-to-one correspondence with the rows in the target task. And the single-wavelength split light in the single-wavelength split light set is in one-to-one correspondence with the row elements in the rows. According to the invention, the method can achieve the integrated and reconfigurable operation of a large-scale optical matrix through a single layer at the same time.

An apparatus includes a silicon (Si) optical phase shifter. In an embodiment, the optical phase shifter comprises a planar optical waveguide having a silicon optical core, and a pair of biasing electrodes located along opposite sides of a segment of the silicon optical core. The segment of the silicon optical core comprises a series of p-n junctions. The series extends in a direction transverse to an optical propagation direction in a segment of the planar optical waveguide including the segment of the silicon optical core. At least two of the p-n junctions are configured to be reverse biased by applying a voltage across the biasing electrodes.

The invention relates to the technical field of light computing, in particular to an intelligent light computing attention mechanism model, method and system. Wherein the model comprises a plurality of light field mutual modulation propagation sub-models, a space calculation module in each light field mutual modulation propagation sub-model encodes an obtained first sub-vector and an obtained second sub-vector into a phase and / or amplitude of a space light field, and the first sub-vector and the second sub-vector are calculated through light propagation to obtain a target first sub-vector; the time calculation module maps the obtained first sub-vector and the second sub-vector to the phase and / or amplitude of the time sequence optical signal, and calculates the first sub-vector and the second sub-vector through optical propagation to obtain a target second sub-vector; the output module performs first fusion on the target first sub-vector of the space calculation module and the target second sub-vector of the time calculation module to obtain a target sub-vector. According to the method, the high-speed parallel processing advantage of photon calculation is utilized, the reasoning process of the model is greatly accelerated, and energy consumption is reduced.

It is provided a photonic multi-level device 1 comprising: a. a waveguide 11 into which light is dedicated to travel along a main optical propagation direction 10, b. a phase change material patch 12, hereafter PCM patch, on the waveguide 11, c. an electro-thermal switching 13, e.g., a heater, in the vicinity of said PCM patch 12, wherein at least one among the waveguide 11, the PCM patch 12 and the electro-thermal switching 13 has a cross-section that varies along the main optical propagation direction 10. Thus, the present invention deals with novel designs for photonic multi-level devices that permit to modify in a compact, multi-level, reliable, and controllable way the device optical response.

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.