60 results about "Beam coupling" patented technology

The invention belongs to the technical field of light beam coupling tracking and pointing, and particularly relates to a light beam coupling tracking and pointing method and device based on an automatic adjusting optical fiber coupling module, and the method comprises the steps: obtaining a cooperative target light beam, carrying out the shaping processing of the cooperative target light beam through an optical system, and carrying out the symmetric light splitting of the shaped cooperative target light beam through a spectroscope; the light beam is divided into a detection light path and a coupling light path; the position of a light spot on a detection light path is detected through a CMOS module, the center coordinate of the light spot is extracted, and the X-axis offset difference value and the Y-axis offset difference value of the center coordinate and the preset center position of the CMOS module are calculated; and calculating the adjusting quantity of the XYZ three-axis micro-motion execution mechanism through a closed-loop algorithm, controlling the micro-motion execution mechanism to drive the optical fiber coupling module to move in the corresponding axial direction, continuously collecting light spot position data of the CMOS module, and adjusting the adjusting parameters of the micro-motion execution mechanism in real time through data feedback. Therefore, the problems of high delay, limited accuracy and the like in the prior art are solved.

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.

The invention discloses an ultra-narrow band optical filter absolute frequency reference in-situ calibration device which comprises a hollow cathode lamp, the output end of the hollow cathode lamp is connected with one input end of a one-to-two optical fiber through a light beam coupling device, and the output end of a variable diaphragm is connected with the other input end of the one-to-two optical fiber through an optical fiber; light beams output by the one-to-two optical fiber are split, the first split beam is input to the second photoelectric detector, and the second split beam transmits the ultra-narrow band light filter and is detected by the first photoelectric detector; the invention further discloses an in-situ calibration method for the absolute frequency reference of the ultra-narrow band light filter, the center transmission wavelength of the etalon is calibrated through the absolute wavelength of the hollow cathode lamp, the etalon is accurately controlled at constant temperature and constant voltage, the center transmission wavelength of the etalon is calibrated, and the calibration of the center wavelength of the etalon is integrated with an external optical signal detection function; and through the automatic calibration process, the calibration efficiency is greatly improved, manual operation errors are avoided, and a high-precision calibration task can be completed in a short time.

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.

Examples of the disclosure relate to optical apparatus, modules and devices for providing a more uniform output. The apparatus can comprise a light guiding member comprising a stack of layers and multiple interfaces between respective layers, wherein the respective layers are arranged to enable light to be guided through the light guiding member via internal reflections. The apparatus also comprises first in-coupling diffractive means configured to in-couple one or more input beams of light into the light guiding member, expanding diffractive means configured to expand the one or more input beams of light, and out-coupling diffractive means configured to out-couple the one or more beams of light from the light guiding member wherein the first in-coupling diffractive means and the out-coupling diffractive means are provided on a first layer of the stack of layers. The apparatus also comprises second in-coupling diffractive means configured to in-couple one or more input beams of light that has passed through the stack of layers into the light guiding member and wherein the second in-coupling diffractive means is provided on a different layer of the stack of layers to the first layer.

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).

Method for laser material processing using a processing laser beam (3), wherein a first laser beam (8a), which is coupled into at least a first fiber core (9a) of an optical multicore fiber (9), and a second laser beam (8b), which is coupled into at least a second fiber core (9b) of the multicore fiber (9), are generated from a polarized input laser beam (5) using a birefringent crystal (7), wherein by influencing the polarization of the input laser beam (5) the ratio in which the power of the input laser beam (5) is divided between the first and the second laser beam (8a, 8b) is changed with a modulation frequency (f) between 1 Hz and 100 kHz, in particular between 100 Hz and 100 kHz, and thereby the first and the second laser beam (8a, 8b) can be coupled out of the multi-core fiber (9) alone or together as a processing laser beam (3). characterized by that the polarization is influenced by switching between linearly, circularly or elliptically polarized polarization by means of an electro-optic polarization modulator (6), in particular a Pockels cell or Faraday rotator, which can be controlled with the modulation frequency (f) to change the polarization of the input laser beam (5).

This invention provides a single-wavelength two-dimensional large-angle beam scanning optical system. The system includes: a frequency-stabilized laser, a polarization controller, an optical waveguide phased array, a polarization direction controller, a semi-transparent mirror, a liquid crystal phased array, a liquid crystal retarder, a polarization grating, and a computer. The frequency-stabilized laser is connected to the polarization controller via optical fiber, used to transmit the emitted single-wavelength laser light to the polarization controller through the optical fiber. The optical waveguide phased array is used to emit the laser light controlled by the polarization controller into space and perform one-dimensional beam scanning based on the control of the computer. The polarization direction controller is used to change the polarization direction of the laser light emitted into space to match the polarization state requirements of the incident light from the liquid crystal phased array. The beam emitted from the liquid crystal retarder is coupled to the polarization grating, diffracting the beam and expanding the beam scanning angle. This significantly reduces the size, weight, and power consumption of long-distance space laser communication servo systems.

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.

The invention belongs to the technical field of laser devices, and discloses a system for generating 1042.5 nm pulse laser, which comprises a pump source (1), a pump source beam coupling system (2) and a laser crystal element (4) which are sequentially and coaxially arranged from front to back along a light path direction, and is characterized in that the pump source (1) is a semiconductor laser with the output center wavelength of 940nm; the pump source beam coupling system (2) focuses 940nm laser on the laser crystal element (4), the laser crystal element (4) is a Yb: Ca3 (Nb, Ga) 2-x Ga3O12 crystal, x is equal to 0-2, and 1042.5 nm pulse laser is output by taking the crystal as a gain medium. The CNGG crystal is used as a matrix material, the maximum doping concentration of Yb < 3 + > can be improved, meanwhile, a wide absorption spectrum and a wide emission spectrum are obtained, and therefore the energy conversion efficiency of the laser is remarkably improved.

An apparatus for controlling brightness of images includes: a first light guide including an in-coupling diffraction grating configured to in-couple input beams of light from a first light engine, an expanding grating configured to expand the input beams of light, and an out-coupling diffraction grating configured to out-couple the expanded beams of light; and a second light guide including at least; an in-coupling diffraction grating configured to in-couple input beams of light from a second light engine, an expanding grating configured to expand the input beams of light, and an out-coupling diffraction grating configured to out-couple the expanded beams of light. The out-coupling diffraction grating of the first light guide at least partially overlaps the out-coupling diffraction grating of the second light guide so that images are overlaid to control brightness of images provided by the apparatus.

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 provides a nonlinear optical neural network system and a nonlinear optical calculation method, and the system comprises an optical feedback structure which is used for forming a circulating light path so as to enable a light beam to be circularly transmitted in the system; the input coupling assembly and the output coupling assembly are respectively used for coupling an input light beam to the circulating light path and coupling a part of light beam from the circulating light path as an output light beam; the spatial light modulation device is used for regulating and controlling at least one of the amplitude and the phase of the light beam input by the spatial light modulation device; the diffraction regulation and control assembly is used for executing multi-layer diffraction operation and regulation and control on the light beams input by the diffraction regulation and control assembly; wherein the spatial light modulation device and the diffraction regulation and control assembly are both arranged in the circulation light path, and the configuration mode of the spatial light modulation device and the diffraction regulation and control assembly enables a light beam to sequentially pass through the spatial light modulation device and the diffraction regulation and control assembly in each circulation, and the light beam reaches the output coupling assembly after passing through the diffraction regulation and control assembly.

Optical device (100) and method for coupling a light beam (2) into an optical element (4), for example a waveguide, comprising: a first deflection device (102) configured to deflect the light beam (2) in a first spatial dimension, for example a tilting mirror; a second deflection device (104) configured to deflect the light beam (2) deflected by the first deflection device (102) in a second spatial dimension, for example a tilting mirror; a coupling structure (106) configured to couple the light beam (2) deflected by the second deflection device (104) into the optical element (4);wherein the optical device (100) is configured to map the first or the second deflection device (102, 104) onto the coupling structure (106), such that a variation of a field angle in a field angle range (108) of the deflection device (102) not mapped onto the coupling structure (106) causes a line-shaped variation (110) of the light beam (2) on the coupling structure (106). A pair of data glasses comprising the optical device (100).

The invention relates to a laser beam coupling device and method, relates to the technical field of laser coupling, and aims to solve the problems that an existing disc laser needs a position sensor to sense the rotation angle in real time, the rotation angle and the laser splitting distribution proportion need complex experiment debugging, and the use and production cost is greatly improved. The invention provides a laser beam coupling device which comprises an optical fiber coupler, a diaphragm and a beam splitting module, the optical fiber coupler and the diaphragm are connected with each other, the beam splitting module is connected to the end of the diaphragm and used for splitting laser entering the beam splitting module and coupling the laser into an optical fiber through the diaphragm and the optical fiber coupler, and the beam splitting module comprises a wedge prism and a deflection device. The wedge-shaped prism is driven by the deflection device to perform angle deflection, so that the laser entering the light splitting module is divided into two laser beams according to a required proportion, and the output power proportion of the optical fiber coupler to the inner core and the outer core of the cladding optical fiber is simply adjusted at low cost.

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.

The present invention provides an end capped optical fiber capable of reducing the divergence angle of a collimated light beam. [Solution] The optical fiber with an end cap comprises an optical fiber having a first portion having a first core and a first cladding surrounding the first core, and a second portion having a second core and a second cladding surrounding the second core, wherein the second core is adjacent to the first core and the second cladding is adjacent to the first cladding, and an end cap having a first surface connected to the end face of the second portion and a second surface located opposite the first surface, wherein the diameter of the first core is constant along the optical axis of the first core, the diameter of the second core is larger closer to the end cap, the end cap includes a convex lens, the second surface includes the convex lens surface of the convex lens, and the focal point of the convex lens is located inside the optical fiber and away from the end face of the second portion.

A building system that utilizes an improved beam and coupling system for building a frame or structure having improved strength and durability and improving performance and / or spanning distance of the beam.

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.

The invention relates to an optical device (100) and to a method for coupling a light beam (2) into an optical element (4), for example a waveguide, the optical device comprising: a first deflection device (102), for example a tilting mirror, which is designed to deflect the light beam (2) in a first spatial dimension; a second deflection device (104), for example a tilting mirror, which is designed to deflect the light beam (2) deflected by the first deflection device (102) in a second spatial dimension; a coupling-in structure (106) which is designed to couple the light beam (2) deflected by the second deflection device (104) into the optical element (4); wherein the optical device (100) is designed to image the first or the second deflection device (102, 104) onto the coupling-in structure (106) such that a variation of a field angle in a field angle range (108) of the deflection device (102) not imaged onto the coupling-in structure (106) brings about a linear variation (110) of the light beam (2) on the coupling-in structure (106). The invention also relates to smart glasses comprising the optical device (100).

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.

The invention discloses an imaging system and method based on full Stokes polarization regulation and control and a medical detection device. The imaging system comprises a laser light source; the polarization device and the laser light source are arranged at an interval, and light beams of different polarization channels are coupled to three groups of polarization channels, namely a 0-degree / 90-degree linear polarization channel, a 45-degree / 135-degree linear polarization channel and a right-hand / left-hand circular polarization channel; and the photoelectric detection device is located at the downstream of the polarization device and is provided with three differential output channels corresponding to the three groups of polarization channels respectively. And selectively activating at least one of the channel A, the channel B and the channel C, converting an obtained optical signal into an electric signal by the photoelectric detection device, and converting the electric signal into an image gray scale through depolarization imaging and polarization coding ternary convolutional neural network imaging. According to the invention, polarization response is converted into a logic signal unit, a polarization convolution model for image processing is constructed, and image edge detection and intelligent identification are directly carried out on a detector level.

A display system includes a display screen layer, a coupling region, an upper guide, a first coupler, a second coupler, and an optical element. The coupling region may be positioned along a sidewall of the display screen layer and may route a beam between the optical element and the upper guide and may route the beam between the first coupler and the second coupler. The first coupler may be positioned along a front surface of the upper guide and may couple a beam through the front surface of the upper guide. The second coupler may be positioned between the coupling region and the upper guide and may couple the beam between the coupling region and the upper guide. The optical element may be positioned below a back surface of the upper guide. A computing device with the display system is also disclosed.

A beam extraction system is provided. The beam extraction system includes a first focusing optic, a second focusing optic, and an optic relay coupled to the first focusing optic and the second focusing optic. The first focusing optic is configured to form a light beam from light collected from a sample positioned at a focal point of the first focusing optic. The second focusing optic is configured to couple the light beam to a detector. The optic relay provides an optic path for the light beam from the first focusing optic to the second focusing optic.