27 results about "Beam coupling" patented technology

A wavelength beam combining device includes: a plurality of laser light sources configured to emit a plurality of laser beams in a first direction and having mutually different peak wavelengths and central axes arranged in a second direction intersecting the first direction; a first diffraction grating disposed at a position where the plurality of laser beams are received, the first diffraction grating being configured to diffract the plurality of laser beams in different directions according to wavelengths of the laser beams to cause the diffracted laser beams to enter the second diffraction grating; a second diffraction grating configured to diffract the plurality of laser beams diffracted by the first diffraction grating to form a wavelength-combined beam, and to direct the wavelength-combined beam in the first direction; and an optical coupling unit configured to couple the wavelength-combined beam to an optical transmission fiber and to be movable in the second direction.

The present invention provides an end capped optical fiber that can reduce the angular misalignment of the optical axis of a collimated light beam. [Solution] The optical fiber with an end cap comprises an optical fiber and an end cap having a first surface connected to the end face of the optical fiber, a second surface located opposite the first surface, and a side surface connecting the first and second surfaces. The end cap includes a convex lens, the second surface includes the convex lens surface, and the side surface includes an outer surface surrounding the optical axis of the convex lens. The angle formed by each of the two intersecting lines between the virtual plane containing the optical axis and the outer surface with respect to the optical axis changes as the virtual plane rotates once around the optical axis.

The application discloses a pump-repump-probe time-resolved spectrum system for measuring luminescence and absorption, comprising a laser beam splitting module, a probe light path construction module, a pump light path regulation module, a repump light path adjustment module, a double-channel signal acquisition module and a light path coupling and converging module. The same femtosecond laser is used to split a light beam, two-stage light splitting is performed to obtain initial light beams of pump, repump and probe light paths, and each light path is subjected to delay adjustment, wavelength conversion, focusing and other treatments, and then is precisely coupled at the same spatial position of a sample. The double-channel signal acquisition module synchronously captures luminescence signals and probe light transmission signals of the sample, and realizes data acquisition in combination with reference light path calibration. The test method acquires multidimensional dynamic information through light path optimization, light beam coupling, signal synchronous acquisition and analysis. The system realizes synchronous detection of luminescence and absorption signals under the same excitation condition, and solves the test error and single mode limitation of the traditional independent system.

To improve coupling efficiency when coupling wavelength-coupled light beams with an optical transmission fiber. A wavelength beam coupling device couples a plurality of laser beams emitted from a laser light source and having mutually different peak wavelengths, and the central axes of the light beams emitted in a first direction are arranged in a second direction intersecting the first direction. The wavelength beam coupling device includes: first and second diffraction gratings, the first diffraction grating being disposed at a position receiving the plurality of laser beams and causing the plurality of laser beams to be diffracted in different directions according to wavelengths to be incident on the second diffraction grating, the second diffraction grating further diffracting the plurality of laser beams diffracted by the first diffraction grating to form wavelength-coupled light beams, and the wavelength-coupled light beams being emitted in the first direction; and an optical coupling unit coupling the wavelength-coupled light beams with the optical transmission fiber and configured to be movable in the second direction.

An eyepiece waveguide for an augmented reality display system includes a substrate having a first surface and a second surface and a diffractive input-coupling element. The diffractive input-coupling element is configured to receive an input light beam and couple the input light beam into the substrate as a guided light beam. The eyepiece waveguide further includes a diffractive combiner pupil expander-extractor (CPE) element formed on or in the first surface or the second surface of the substrate. The diffractive CPE element includes a first portion and a second portion divided by an axis. A first set of diffractive optical elements is disposed in the first portion and oriented at a positive angle relative to the axis, and a second set of diffractive optical elements is disposed in the second portion and oriented at a negative angle relative to the axis.

To improve the coupling efficiency when coupling a wavelength-coupled beam into an optical transmission fiber. [Solution] The wavelength beam coupling device couples multiple laser beams emitted from a laser light source, each having different peak wavelengths, and arranged in a second direction where the central axes of the beams emitted in a first direction intersect with respect to the first direction. The wavelength beam coupling device comprises first and second diffraction gratings, the first diffraction grating being positioned to receive multiple laser beams and diffracting the multiple laser beams in different directions according to their wavelengths and causing them to be incident on the second diffraction grating, the second diffraction grating further diffracting the multiple laser beams diffracted by the first diffraction grating to form a wavelength-coupled beam, and emitting the wavelength-coupled beam in the first direction, and an optical coupling unit for coupling the wavelength-coupled beam into an optical transmission fiber, the optical coupling unit being configured to be movable in the second direction.

The present invention provides a beam coupler that can ensure high transmission quality. The present invention is provided with: an emission unit (230) from which condensed laser light (L) is emitted toward a transmission fiber (F2); an emission-side connector unit (260) that faces the emission unit (230) in the direction of propagation of the laser light (L) and holds the transmission fiber (F2) on which the laser light (L) is incident; a position adjustment unit for adjusting the position of the emission-side connector unit (260); and a bellows (280) that is connected to the emission unit (230) and the emission-side connector unit (260) and covers the gap between the emission unit (230) and the emission-side connector unit (260). The bellows (280) is capable of deforming so as to allow movement of the emission-side connector unit (260) relative to the emission unit (230).

The application discloses a high-power semiconductor laser fiber coupling system based on total reflection and belongs to the technical field of lasers. The system comprises two groups of semiconductor laser array modules, a fast-slow axis collimating mirror array, a dichroic mirror for wavelength beam combining, a reflecting mirror for light path folding, a beam shrinking device and a focusing mirror for coupling light beams into an optical fiber; an isosceles right prism group based on total reflection is used to fill the dark area in the fast axis direction. The wavelengths of the array modules in each group of semiconductor laser array modules are the same, the semiconductor laser fiber coupling system can achieve the purpose of beam shaping and obtain high-power output, and compared with the traditional method, the structure is simple and compact.

A detection device includes an optical coupler, a scattering component, a detector, and a processor. The optical coupler is configured to: receive a to-be-detected light beam, and couple the to-be-detected light beam to the scattering component. The scattering component is configured to: scatter the to-be-detected light beam, and output a plurality of scattered to-be-detected light beams at different angles in time division mode to the detector. The plurality of scattered to-be-detected light beams are in one-to-one correspondence with the plurality of angles. The detector is configured to detect a plurality of different regions of the plurality of scattered to-be-detected light beams, to obtain a plurality of electrical signals. The detector is further configured to transmit the plurality of electrical signals to the processor. The processor is configured to compute the plurality of electrical signals to obtain related information of the to-be-detected light beam.

The invention relates to a sensor device (10) for detecting a physical quantity (110) acting on the sensor device (10), wherein the sensor device (10) has a sensor element (40) and a first optical interface (21) for coupling a light beam (23) from an optical source (20) into an optical path (25) and / or a second optical interface (22) for coupling the light beam (23) out of the optical path (25) to an optical detector (30), wherein the sensor element (40) at least partially encompasses the optical path (25) and is designed such that, in the event of at least partial deformation and / or at least partial deflection and / or at least partial change of a physical property of the sensor element (40), which occurs in particular due to a change in the physical quantity (110) to be measured by the sensor device (10), the optical path (25) changes at least partially.The invention also relates to a sensor system (120) with several sensor devices (10) according to the invention.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an apparatus may receive, via a receive beam, a first reference signal from a first transmission reception point (TRP). The apparatus may receive, via the receive beam, a second reference signal from a second TRP. The apparatus may transmit an indication of a difference between a first measurement of the first reference signal and a second measurement of the second reference signal. Numerous other aspects are described.

A displacement measurement interferometer has a beam coupler to decollimate source radiation; beam-splitting optics that (a) output the source radiation toward a reflective target and (b) split reflected radiation into a single-pass optical beam and a multi-pass optical beam; and reflective optics to retroreflect the multi-pass optical beam through the beam-splitting optics to the reflective target. A method for measuring displacement of an object includes: reflecting non-collimated source radiation off a surface of the object; splitting reflected radiation from the surface of the object into a single-pass optical beam and a multi-pass optical beam; retroreflecting the multi-pass optical beam to the surface; and determining the displacement from an interference signal between the single-pass optical beam and the multi-pass optical beam after the single-pass optical beam reflects off the surface and after the multi-pass optical beam reflects off the surface at least twice.

We provide a beam coupler that can ensure high transmission quality. [Solution] The system includes an output section 230 from which focused laser light L is emitted toward a transmission fiber F2, an output-side connector section 260 facing the output section 230 in the direction of propagation of the laser light L and holding the transmission fiber F2 into which the laser light L is incident, a position adjustment section for adjusting the position of the output-side connector section 260, and a bellows 280 connected to the output section 230 and the output-side connector section 260, covering the gap between the output section 230 and the output-side connector section 260, wherein the bellows 280 is deformable to allow movement of the output-side connector section 260 relative to the output section 230.

Examples of the disclosure relate to optical apparatus, modules, and devices. Examples of the disclosure relate to an apparatus including a light guide. The light guide includes at least an in-coupling diffractive member configured to in-couple one or more input beams of light into the light guide from a light engine, an expander configured to expand the one or more input beams of light, and an out-coupling diffractive member configured to out-couple the one or more expanded beams of light from the light guide. The out-coupling diffractive member includes at least a first section configured to out-couple the one or more expanded beams of light with a first efficiency and at least a second section configured to out-couple the one or more expanded beams of light with a second efficiency, where the second efficiency is lower than the first efficiency.

According to an embodiment, a display structure (100) comprises: a waveguide (101); an in-coupling structure (102) configured to receive a set of input beams (103) and couple the set of input beams (103) into the waveguide (101) as a set of in-coupled beams (104); an exit pupil expansion structure (105) configured to receive the set of in-coupled beams (104), wherein the exit pupil expansion structure (105) comprises diffractive grating features configured to diffract at least a first polarization (301) in the set of in-coupled beams to form a set of diffracted beams (106) and to rotate at least a part of the first polarization (301) in the set of in-coupled beams (104) into a second polarization (302) in the set of diffracted beams (106) and the diffractive grating features are at least partially transparent to the second polarization (302); and an out-coupling structure (107) configured to outcouple the set of diffracted beams (106) from the waveguide (101).

This invention provides a laser processing lens and its application processing system, belonging to the field of laser beam processing technology. The lens comprises a negative lens group, a positive lens group, and a coupling component. These three components are coaxially arranged vertically with their optical axes coinciding with the incident laser, ensuring stable linear laser transmission. The negative lens group has a negative total optical power, which can diverge and expand the laser beam, increasing the beam divergence angle, balancing the converging effect of the positive lens group, shifting the reflected focus outward, and simultaneously generating negative spherical aberration to counteract the positive spherical aberration of the positive lens group. The positive lens group uses multiple low-power positive lenses arranged at intervals to gradually converge the beam. The lenses are made of materials with a low coefficient of thermal expansion to suppress thermal deformation and focus drift. An air buffer layer is placed between adjacent lenses to block heat conduction and disperse reflected light. The coupling component is located below, receiving the converged beam and coupling it with a high-pressure water jet. This invention can improve focus shift and reduce beam coupling efficiency while preventing the reflected focus from falling inside the lens.

The application provides a bionic anti-icing surface and a laser double-beam coupling micro-processing method thereof, and the metal sample polished by sandpaper, ultrasonic cleaned by ethanol and deionized water is fixed on a processing platform with adjustable inclination, the surface of the metal sample placed at an inclination is ablated by a three-dimensional galvanometer, a periodic and size-controllable bionic closed inclined groove micro-nano structure is obtained, and then the surface of the metal sample is chemically treated by a hydrophobizing agent to obtain a bionic anti-icing surface. The application combines the laser double-beam coupling micro-processing method with the surface modification technology, designs and prepares a bionic micro-nano structure surface with superior dynamic anti-icing performance, the energy proportion of the double laser beams with different polarization states is changed, the parameters of the bionic closed inclined groove structure of the ablated material surface by the double laser beams are optimized, the periodic size and the microstructure shape size of the closed inclined groove structure are modulated, and the requirement of enhancing the dynamic anti-icing performance of the surface is better met.

This invention discloses a multi-dimensional joint control method for electromagnetic beams based on anisotropic holographic metasurfaces. It aims to address the shortcomings of existing multi-beam multi-dimensional control capabilities and the problems of inter-beam coupling and interference. The method includes: 1) constructing a target field according to the requirements of the actual application scenario, selecting a feed source, and determining its excitation reference field; 2) calculating the metasurface impedance components using tensor holography theory based on the target field and reference field to complete the physical structure design; 3) introducing a fully polarized modulation matrix into the target field expression and adding power allocation coefficients for beams of different polarizations to achieve joint control of arbitrary polarization and different energy ratios; 4) introducing a spatial multiplexing strategy into the beam field to jointly optimize the propagation direction and initial radiation position of different beams; and simultaneously combining polarization isolation and amplitude-phase modulation to achieve stable multi-beam transmission. This invention can effectively improve the anti-interference capability and energy utilization of multi-beam transmission, meeting the requirements of system applications.

Examples of the disclosure relate to optical apparatus that enable tracking of a user of the apparatus. The apparatus comprises a light guide arranged to enable light to be guided through the light guide via internal reflections, first in-coupling diffractive means configured to in-couple one or more input beams of light with a first wavelength range into the light guide, second in-coupling diffractive means configured to in-couple one or more input beams of light with a second wavelength range into the light guide, expanding diffractive means configured to expand the one or more input beams of light, and out-coupling diffractive means configured to out-couple the expanded beams of light from the light guide so as to provide a first exit pupil for the first wavelength range and a second exit pupil for the second wavelength range.

An eyepiece waveguide for an augmented reality display system includes a light-transmitting substrate, a first input coupling grid (ICG) region, a second ICG region, and one or more pupil dilators and extraction grids. The first ICG region can receive an input light beam corresponding to a first color component of the input image and couple the input light beam to the substrate. The second ICG region can receive an input light beam corresponding to a second color component of the input image and couple the input light beam to the substrate. The pupil dilators and extraction grids can duplicate the input coupled beam and output couple it from the substrate. The first and second ICG regions can be positioned at angularly separated locations around the substrate. The eyepiece waveguide can reduce color distortion in the output image.

This invention relates to a two-dimensional spatial laser communication beam coupling method based on sharpness-perception minimization, belonging to the field of spatial laser communication technology, and solving the technical problem that existing algorithms for improving coupling effects often fail to achieve the expected coupling results. The method includes the following steps: acquiring optical power in the neighborhood of the current spot position; performing gradient estimation based on the acquisition results; calculating the next position of the spot based on the sharpness-perception minimization algorithm; acquiring the optical power output at the adjusted spot position; if the optical power output meets the requirements, pausing coupling and continuously monitoring the optical power; otherwise, returning to the initial steps. The two-dimensional spatial laser communication beam coupling method based on sharpness-perception minimization of this invention provides more accurate gradient estimation, with a higher degree of agreement between the estimated gradient and the actual gradient; it can escape local optima and improve the ability to find the global optimum.

This utility model discloses an open long-path gas detection system, including a master optical frequency comb laser and a slave optical frequency comb laser, both of which are connected to a first fiber optic beam splitter. The first fiber optic beam splitter outputs a first beam and a second beam. The first beam is coupled into the second fiber optic beam splitter. The beam output from the first output end of the second fiber optic beam splitter is aligned with the incident window of the first absorption cell, and the exit window of the first absorption cell faces the first photodetector. The beam output from the second output end of the second fiber optic beam splitter is aligned with the incident window of the second absorption cell, and the exit window of the second absorption cell faces the second photodetector. The second beam is transmitted to the input end of a fiber-coupled transceiver optical terminal. The beam output from the return end of the fiber-coupled transceiver optical terminal is aligned with the incident window of a calibration absorption cell, and the exit window of the calibration absorption cell faces the third photodetector. The advantages of this utility model are: high operating efficiency and accuracy, and strong flexibility.

The invention relates to a method for monitoring a coating process, wherein, when a substrate having a substrate plane is subjected to a coating process in which a first side of the substrate extending parallel to the substrate plane and / or a second side opposite the first side and extending parallel to the substrate plane is in each case applied with at least one coating layer, a light beam is emitted onto the substrate and at least partially transmitted through the substrate, a sub-beam is coupled out of the transmitted light beam, the coupled-out sub-beam impinges onto a sensor, after the coupled-out sub-beam the transmitted light beam is redirected onto the substrate and at least partially transmitted through the substrate again, the transmitted light beam impinges onto a last sensor, the light beam impinging onto the last sensor and the sub-beams impinging onto the sensors preceding this are each associated, a spectrum is determined, and at least one of the determined spectra is used to determine at least one property of the at least one coating layer currently being applied to the substrate and / or at least one property of the at least one coating layer currently being applied to at least one further substrate subjected to the same coating process as the substrate and / or at least one property of the coating process being carried out. The invention also relates to a device for monitoring a coating process using the method according to the invention.

Examples of the disclosure relate to optical apparatus that enable tracking of a user of the apparatus. The apparatus comprises a light guide arranged to enable light to be guided through the light guide via internal reflections, first in-coupling diffractive means configured to in-couple one or more input beams of light with a first wavelength range into the light guide, second in-coupling diffractive means configured to in-couple one or more input beams of light with a second wavelength range into the light guide, expanding diffractive means configured to expand the one or more input beams of light, and out-coupling diffractive means configured to out-couple the expanded beams of light from the light guide so as to provide a first exit pupil for the first wavelength range and a second exit pupil for the second wavelength range.

The application provides a detection device applied to the detection field, for example, the spectrum detection field. The detection device comprises a light coupler, a scattering assembly, a detector and a processor. The light coupler is used for receiving a to-be-detected light beam and coupling the to-be-detected light beam to the scattering assembly. The scattering assembly is used for scattering the to-be-detected light beam and outputting a plurality of scattered to-be-detected light beams to the detector in a time-division manner at different angles. The plurality of scattered to-be-detected light beams and the plurality of angles correspond to each other. The detector is used for detecting different regions in the plurality of scattered to-be-detected light beams and obtaining a plurality of electric signals. The detector is also used for transmitting the plurality of electric signals to the processor. The processor is used for calculating the plurality of electric signals and obtaining related information of the to-be-detected light beam. In the technical scheme provided in the application, the output direction of the to-be-detected light beam is adjusted, the related information of the to-be-detected light beam can be acquired by the detector in a time-division manner, and therefore the cost of the detection device is reduced.