2540 results about "Laser source" patented technology

The invention provides a multi-layer optical film detection method, device and equipment and a storage medium, and the method comprises the steps: obtaining a polarization phase difference signal of transmission light and reflected light through multi-angle incidence irradiation of a multi-band programmable laser source, and recording the polarization ellipticity parameter change; then combining confocal microscopic interference and polarization analysis to determine a space coordinate and a stress distribution diagram of a stress abnormal region; continuously irradiating in a photo-thermal coupling environment through a broadband light source, and monitoring interference signals, polarization states and temperature changes to obtain dynamic evolution characteristics; and finally, performing a simulation test on the multi-layer optical film in a system environment with preset optical axis arrangement and light beam energy distribution, obtaining an in-situ polarization state and interference pattern data, and evaluating the optical performance of the film layer. According to the invention, potential defects can be positioned under high resolution, and the reliability and imaging quality of the film layer under complex application conditions can be accurately evaluated.

The invention discloses an inter-satellite laser communication load on-orbit receiving and transmitting optical axis coaxial self-calibration device and method, and belongs to the field of inter-satellite laser communication. Comprising a cube-corner prism, a coarse pointing mechanism, a beam expanding group lens, a color separation sheet, a fast reflecting mirror, a communication signal light emitting system, an optical filter, a light splitting sheet, an optical filter, a signal focusing mirror, a communication signal detector, a tracking focusing mirror and a tracking signal detector. Under the condition that beacon light is not used and a laser source is not additionally added, communication signal light is directly adopted to calculate and compensate the offset between the receiving optical axis and the transmitting optical axis through the cube-corner prism, the on-orbit alignment capture time is greatly shortened, and the cost, power consumption, size and weight of a self-calibration device are reduced.

Provided is a light source device, including a first laser light source group, a second laser light source group, a dichroic mirror, a fluorescence converter, and an emission component. The first laser light source group emits laser light of a first waveband, and the second laser light source group emits laser light of a second waveband and laser light of a third waveband. The dichroic mirror is disposed on light-output sides of the first laser light source group and the second laser light source group, and the fluorescence converter and the emission component are respectively disposed on light-output sides of the dichroic mirror. The dichroic mirror is configured to emit laser light of various wavebands, and the fluorescence converter generates target fluorescence under the excitation of the laser light of the first waveband, and the target fluorescence is reflected by the dichroic mirror to the emission component.

The invention relates to the technical field of optical element manufacturing, in particular to an exposure device with an adjustable interference angle without other optical elements, an exposure method and a preparation method of a reflective volume grating. The exposure device comprises a laser source, a reflector, a beam expanding system, a collimating lens, an optical rotating table and PTR glass, wherein the PTR glass is arranged on the optical rotating table; wherein laser emitted by the laser source passes through the reflector, is subjected to light spot beam expansion through the beam expansion system, and is subjected to light beam collimation through the collimating lens, and then the light beam enters the PTR glass body and is interfered in the PTR glass body to form interference fringes; by rotating the optical rotating table, a light beam is incident into the PTR glass body at different angles, and interference fringes of different periods are formed by changing the interference angle. The interference angle is changed by adjusting the light incident angle, the reflective volume grating with different wavelengths is prepared, interference can be automatically formed without depending on redundant optical components, and meanwhile the reflective volume grating has the advantages of being low in cost, simple in structure, easy to operate, beneficial to large-scale production and the like.

The invention relates to the technical field of laser processing, in particular to a multi-beam intelligent focusing invisible laser cutting device and method. A multi-beam intelligent focusing invisible laser cutting device comprises a laser source, a beam splitting module, a focus control module and a wafer scanning module. The beam splitting module comprises a beam expanding device, a reflecting mirror, a diffraction light splitting device and a collimating mirror group; the laser source emits a light beam to irradiate the beam expanding device; the beam expander is located between the laser source and the reflector; multi-line and multi-layer simultaneous cutting can be achieved through single scanning, repeated positioning is not needed, the wafer invisible cutting efficiency can be greatly improved, and the cutting efficiency is improved by several times compared with a traditional single-layer process. Energy is dispersed by using ultrafast laser and multiple light beams, and the influence of a heat affected zone on the wafer is reduced. The device can adjust different line laser focus positions in real time, and is compatible with different material thicknesses and structures.

According to the mining dust monitoring system and method based on multi-wavelength fusion and dynamic compensation, a light chamber is arranged in an inner cavity of a shell, an inlet of the light chamber is connected with a main gas inlet of the shell through a gas inlet pipeline, and an outlet of the light chamber is connected with a main gas outlet of the shell through a gas exhaust pipeline; the laser detection module is mounted in the light chamber and comprises a lens group, a laser source I, a laser source II, a light scattering signal receiving module, a light transmission signal receiving module and a light trap; the first laser source and the second laser source form a dual-wavelength laser source; the micro fan is mounted in the main air outlet; the environment sensing module is mounted in the exhaust pipeline; the method comprises the following steps: constructing an environment drift prediction model; testing the dust concentration in the environment to be tested, and calculating the dust concentration I Csct and the dust concentration II Ct based on the scattered light electric signal and the transmission photoelectric signal; and carrying out environment drift prediction, and obtaining corrected dust concentration data through a fusion calculation mode. According to the system and the method, an accurate dust concentration monitoring result can be obtained.

A pulsed laser source device configured to a plurality of Fabry Perot resonant cavities. The pulsed laser source device provides a frequency, a wavelength, and a phase, each of which is matched with a plurality of laser beams configured, respectively, with the plurality of Fabry Perot resonant cavities to generate a high intensity beam for laser fusion.

A Rydberg sensor may include a probe laser source and a quantum radio frequency (QRF) cavity downstream from the probe laser source and configured to define a path for a plurality of probe laser beam passes within the QRF cavity. A Rydberg sensing region may be within the QRF cavity and in the path of the probe laser beam passes. An optical amplifier may be within the QRF cavity and in the path of the probe laser beam passes. A detector may be downstream from the QRF cavity.

The invention relates to the technical field of gas detection, in particular to a dual-wavelength-based adaptive methane detection method and system, and the method comprises the following steps: collecting environmental interference characteristics of a to-be-detected gas environment in real time; synchronously emitting a first laser beam and a second laser beam to a to-be-detected gas environment according to the tunable laser source; receiving optical signals of the first laser beam and the second laser beam and converting the optical signals into electric signals; calculating a light intensity difference value of the first laser beam and the second laser beam based on the electric signal to generate a differential absorption signal; performing optical differential compensation on the differential absorption signal, outputting a methane concentration value, and performing environmental drift compensation on the methane concentration value based on environmental interference characteristics; and performing real-time threshold value judgment on the methane concentration value, and if the methane concentration value exceeds a preset threshold value, triggering a local early warning signal. According to the invention, the problem that the detection precision is reduced due to the fact that methane absorption signal common-mode noise and absorption coefficient drift cannot be synchronously inhibited due to dust concentration and temperature and humidity interference in a dynamic complex environment under a mine is effectively solved.

An optical emission array includes an optical input portion configured to provide a parent laser source for the optical emission array, and an optical output portion including a plurality of child laser emitters. Each child laser emitter of the plurality of child laser emitters is injection-locked to the parent laser source. The optical emission array further includes at least two optical distribution branches (i) disposed between the optical input portion and the optical output portion, and (ii) optically connecting at least two child laser emitters of the plurality of child laser emitters, respectively, to the parent laser source.

The invention relates to an underground cavern surrounding rock three-dimensional vibration measurement method and device, and the method comprises the steps: generating a light spot meeting a preset clear condition through beam splitting laser; acquiring the vibration condition of the laser source and the vibration condition of the photographic lens; cutting the tracking record image of the light spot, and respectively calculating the relative displacement time history of the feature points and the boundary of the light spot; based on curvature, length and area changes of the circular light spot in different directions, a vertical relative displacement time travel curve of the light spot perpendicular to the surface of the surrounding rock of the target underground cavern is calculated; and differentiating the obtained plane and vertical displacement time histories to obtain corresponding vibration velocity time histories, and combining to construct the actual three-dimensional vibration velocity of each light spot. According to the embodiment of the invention, the monitoring cost is reduced, the field monitoring efficiency and the monitoring data volume are improved, the applicability in the construction environment with poor light of the underground cavern is higher, the defects of a high-speed photographing single lens in three-dimensional data representation are overcome, and effective monitoring and evaluation of three-dimensional vibration of the underground cavern are realized.

The invention belongs to the technical field of current detection, and provides a quantum current sensor and a current measurement method, and the sensor comprises a passive probe, a laser source, a photoelectric detection module, a microwave modulation module, and a microwave processing module. The passive probe comprises a diamond structure with a spinning color center, the laser source generates a laser signal, the microwave modulation module generates a microwave signal and modulates the microwave signal to generate a microwave modulation signal, the laser signal and the microwave modulation signal are transmitted to the passive probe to generate a fluorescence signal, and the photoelectric detection module converts the fluorescence signal into an electric signal. And the microwave processing module demodulates the electric signal to generate a demodulation signal and regulates and controls the microwave modulation module, so that the frequency of the microwave signal is matched with the resonant frequency of the spin color center of the diamond structure. Through the modulation and demodulation process and the remote transmission and frequency regulation and control of the microwave signal, the noise filtering effect and the current dynamic measurement range are improved, and the high-voltage side signal transmission without power consumption and the passive measurement of the high-voltage side are realized.

The invention relates to the technical field of crack detection, in particular to an intelligent detection system for house outer wall cracks, which comprises an optical frequency comb scanning module, a polarized light scattering analysis module, a holographic imaging refining module and a data integration and alarm module. According to the invention, the optical pulse emitted by the laser source is accurately controlled, high-precision scanning is carried out on the outer wall of the house, and the data acquisition precision is optimized, so that the spatial position information is captured more accurately, and the roughness and structure change information of the crack surface is extracted according to the polarization state change of the light through the measurement of the polarized light. The three-dimensional form of the crack is recovered by utilizing a holographic imaging technology, a detailed three-dimensional view of the crack is provided, and the crack change can be monitored in real time through comprehensive processing of data and setting of a warning threshold, so that the response speed and the processing efficiency of crack monitoring are remarkably improved, and the human intervention requirement is reduced; and the capability of preventing and dealing with crack propagation is improved.

The invention discloses a fiber bragg grating femtosecond laser direct writing system and method based on light field regulation and control. The system comprises a femtosecond laser source, a polarization control module, a light beam expanding module, a light field modulation module, a 4f filtering imaging module, an oil immersed objective lens, a precision positioning and optical fiber clamping module, an observation module and a computer control module. The method comprises the following steps: firstly, fixing a standard single-mode optical fiber to be processed on a three-dimensional precision displacement platform; then programmable wavefront modulation is carried out on the femtosecond laser through a light field modulation module, and a multi-focus array is generated; then focusing the multi-focus array into the fiber core through an oil-immersed objective lens to realize one-time parallel inscribing of a plurality of refractive index modulation RIM regions; and finally, the computer control module controls the three-dimensional precision displacement platform to move at a constant speed in the axial direction of the optical fiber, and parallel integrated inscribing of a plurality of FBG structures is completed. According to the invention, the inscribing precision and inscribing efficiency of fiber bragg grating femtosecond laser direct writing are improved.

The invention discloses an on-chip time-frequency transmission system and method based on an octave optical comb and an electro-optical modulation optical comb, and the method comprises the steps: constructing a chip-based optical reference cavity through the technologies of vacuum optical cement, photoresist backflow and the like, and achieving an on-chip ultra-stable laser through a phase modulator and a reflection separation optical path; an on-chip laser source pumping micro-ring resonant cavity is utilized to generate an octave optical frequency comb, frequency multiplication is carried out on the on-chip laser source pumping micro-ring resonant cavity and an additional laser source to realize detection and locking of carrier envelope offset frequency (fceo), frequency beating is carried out on the on-chip laser source pumping micro-ring resonant cavity and the on-chip ultra-stable laser device to realize frequency beating (fbeam) locking, and the laser source is utilized to generate an electro-optical modulation optical frequency comb through a circulating phase modulator to realize frequency beating and locking of the on-chip ultra-stable laser device. And the optical time frequency is locked with the locked octave optical comb, is sent to a far end after polarization control and light amplification, and simultaneously receives an electro-optical modulation optical comb at the far end and performs linear light sampling, so that the transmission of the optical time frequency is realized. The optical fiber or space optical link time-frequency transmission device can realize optical fiber or space optical link time-frequency transmission, and has the advantages of low overall noise, high transmission precision, compact structure, small size, low power consumption and the like.

A LSP broadband light source is disclosed. The light source may include a gas containment structure. The light source may include multiple jet nozzles, wherein the jet nozzles are configured to generate supersonic gas jets and direct the supersonic gas jets to collide within the gas containment structure to form a localized high-pressure region at the collision point. The light source may include a primary laser pump source, wherein the primary laser pump source is configured to direct a primary pump beam to a localized high-pressure region formed at the collision point. The light source may include a pulsed-assisting laser source, wherein the pulsed-assisting laser source is configured to direct a pulsed-assisting beam to the localized high-pressure region at the collision point. The light source may include a light collector element configured to collect broadband light emitted from the plasma.

The invention discloses an intelligent two-dimensional code anti-counterfeiting verification system, and relates to the technical field of anti-counterfeiting, and the system comprises an information coding and encryption module, a phase conversion and encryption module, an optical instruction generation module, a scanning and instruction execution module, and a decryption and verification module. The information coding and encryption module is used for collecting comprehensive information of a product and generating a basic two-dimensional pattern according to a two-dimensional code coding standard. The phase conversion and encryption module is introduced, so that a major breakthrough of a two-dimensional code anti-counterfeiting verification technology is realized, the module can convert key information into phase information, and the phase information is transmitted to the two-dimensional code; according to the optical encryption method, the two-dimensional code is used as a laser source, normalization processing is carried out in combination with laser wavelength, the phase of reflected light in a specific area of the two-dimensional code is changed through a phase mask plate, so that encrypted information is embedded, the security and reliability of anti-counterfeiting verification are greatly improved, normal scanning and reading functions of the two-dimensional code are not affected, and the security and reliability of the two-dimensional code are improved. And a more powerful technical guarantee is provided for product anti-counterfeiting.

Disclosed herein is an optical frequency comb generator for a distributed acoustic anomaly detection system. The system can include a continuous wave frequency modulated laser source configured to generate a laser signal. The system can include an acousto-optical modulator configured to modulate the laser signal by altering an amplitude and / or frequency of the laser signal based on an RF drive signal applied to the AOM, and to output an optical pulse with multiple frequency sidebands based on the modulation. The output can form an optical frequency comb usable detecting and locating acoustic anomalies within a structure under observation.

A Rydberg atom television receiver is disclosed. The receiver comprises a probe laser, a source polarizing beam displacer, a Rydberg atom receiver cell, receiver atoms, a detector polarizing beam displacer, a detector polarizing beam cube, a first photodiode, a second photodiode, a differential amplifier, a display, and a coupling laser. The receiver receives a modulated waveform imprinted on a radiofrequency carrier a displays a graphical representation corresponding to a modulation source.

Various aspects disclosed herein relate to a fiber-optic medical treatment apparatus for treatment of a urinary tract, in particular of the urinary bladder, of a subject. An illustrative apparatus may include a first treatment laser source and a fiber-optic device including at least one optical fiber; wherein the fiber-optic device has a proximal end and a distal end configured to be advanced through a working channel of a cystoscope into the urinary tract of a subject, wherein the first treatment laser source is configured to output first treatment laser radiation for treatment of a medical condition of the urinary tract and to optically couple the first treatment laser radiation into the fiber-optic device, wherein the apparatus is configured to emit the first treatment laser radiation from the distal end towards tissue of the urinary tract, in particular of the urinary bladder, to be treated.

The invention provides a tunable laser source output wavelength adjusting device and method, and the method comprises the steps: starting a tunable laser source, carrying out the preheating, and resetting a motor motion unit; acquiring an initial light-emitting wavelength based on a pre-stored relation curve between the light-emitting wavelength of the laser source and the position of the motor; controlling the output wavelength of the laser source through the coarse tuning parameter of the motor motion unit, traversing the tunable output range of the tunable laser source, and collecting the wavelength position of the reflection peak value of the fiber bragg grating and the corresponding optical power value; according to the reflection peak wavelength position, through voltage regulation and control of stacked piezoelectric ceramics, step scanning is carried out according to a target wavelength, and a laser source output wavelength is dynamically adjusted to obtain a fine scanning wavelength; and judging whether the deviation between the fine scanning wavelength and the target wavelength meets the preset precision or not, if so, locking the output wavelength, otherwise, repeatedly regulating and controlling until the conditions are met. According to the invention, traditional current-wavelength dependence is broken through, and wavelength demodulation is realized through electromechanical collaborative calibration and two-stage scanning.

The invention relates to the technical field of laser control, and discloses a 920nm femtosecond pulse fiber laser system based on a neodymium-doped fiber. The system comprises a seed laser source system, a pre-chirp system, an amplification system and a compression system, the output end of the seed laser source system is connected with the input end of the pre-chirp system, the output end of the pre-chirp system is connected with the input end of the amplification system, and the output end of the amplification system is connected with the input end of the compression system. Through a pre-chirp management method, the seed pulse can simultaneously realize the improvement of the pulse energy and the violent broadening of the spectrum in the amplification process. And a wider spectrum can obtain a narrower pulse width after being subjected to time domain compression. The narrower the width of the pulse means that the energy is more concentrated, so that the peak power of the laser pulse output after compression is higher, and the problem that narrow pulse width and high energy output cannot be simultaneously realized in the 920nm wave band in the existing fiber laser technology is solved.

The invention discloses a cold atom optical frequency standard based on long-strip-shaped diffuse reflection cooling and an implementation method of the cold atom optical frequency standard. The device comprises a cooling laser source, a heavy pump laser source, a long-strip-shaped vacuum glass tube, a narrow linewidth laser source and a photoelectric detector. Wherein atoms are decelerated through a laser cooling technology, and Doppler frequency shift and collision frequency shift related to the atomic movement speed are greatly inhibited; the diffuse reflection laser cooling does not need a gradient magnetic field in a magneto-optical trap configuration, so that the influence of the magnetic field on the energy level of the frequency stabilization atomic can be well avoided; the cold atomic group with the meter-scale length, which is realized by using the long-strip-shaped vacuum glass tube, can also greatly increase the interaction distance between light and atoms, and effectively improve the signal-to-noise ratio of an atomic transition spectral line. The cold atom optical frequency standard based on long-strip-shaped diffuse reflection cooling is achieved, substantial and remarkable progress is brought to medium-and-long-term frequency stability of the optical frequency standard, the optical frequency standard can be further developed into an absolute wavelength standard, and a reference is provided for numerous precise measurement applications.

The utility model relates to a water-guided laser coupling device which comprises a laser source (1) and a coupling cavity (2), the laser source (1) is configured to generate laser (10) extending along a preset direction (x), and the coupling cavity (2) comprises an optical window mirror (21) arranged on a propagation path of the laser (10) for the laser (10) to pass through; the high-pressure water cavity (22) is formed in the side, away from the laser source (1), of the optical window mirror (21) in the preset direction (x), and the high-pressure water cavity (22) is configured to form a water jet (220) extending in the preset direction (x); the shielding gas generating mechanism (23) is arranged on the side, away from the laser source (1), of the high-pressure water cavity (22) in the preset direction (x) and is configured to generate layered spiral gas flow (230), the layered spiral gas flow (230) comprises first spiral gas flow (231) and second spiral gas flow (232), and the first spiral gas flow (231) is located on the radial inner side of the second spiral gas flow (232).

An image processor of the disclosure includes: an image sensor that captures an image of an underwater measurement target; a first laser light source that emits first laser light underwater; a second laser light source that emits second laser light underwater from a position that differs from the first laser light source; and a correction data generation unit that generates, on the basis of first information acquired by causing the image sensor to capture images of the first and second laser light beams at a first water depth and second information acquired by causing the image sensor to capture images of the first and second laser light beams at a second water depth which is a water depth at which the image sensor captures an image of the measurement target, correction data used to correct distortion in a captured image captured by the image sensor at the second water depth.

Holographic volume gratings in waveguide cells can be recorded using many different methods and systems in accordance with various embodiments of the invention. One embodiment includes a holographic recording system including at least one laser source configured to emit recording beams and a movable platform configured to move between a first position and a second position, wherein when the movable platform is in the first position, the at least one laser source is configured to emit a first set of one or more recording beams toward a first set of one or more stations and when the movable platform is in the second position, the at least one laser source is configured to emit a second set of one or more recording beams toward a second set of one or more stations.

The invention discloses a high-quality laser welding manufacturing device and a high-quality laser welding manufacturing method, which solve the problems of concentrated energy distribution, small inherent focal depth, insufficient depth-diameter ratio of welding and insufficient welding thickness of the existing ultrafast laser welding technology. The zoom collimation system, the cone mirror, the acousto-optic modulation unit and the long focal depth compression unit are sequentially arranged on a light path where the welding laser is located in the emergent direction of the welding laser. The zoom collimation system is used for changing the spot diameter of the welding laser and collimating the spot diameter; the cone mirror is used for shaping the welding laser subjected to diameter-variable collimation into long-focal-depth laser; the acousto-optic modulation unit divides the long-focal-depth laser into N sub-beams and adjusts the spatial position of each sub-beam, and N is a positive integer greater than or equal to 1; and the long focal depth compression unit is used for adjusting the spot diameter and focal depth length of each sub-beam, so that the focal position and energy of each sub-beam are suitable for laser welding.

A laser processing apparatus including a laser light source, a polarizing beam splitter, a first reflective mirror, a second reflective mirror, and a polarizing beam combiner is disclosed. The laser light source is configured to generate a laser light. The polarizing beam splitter is configured to divide the laser light into a first beam and a second beam. The first reflective mirror is configured to reflect the first beam. The second reflective mirror is configured to reflect the second beam. The polarizing beam combiner is disposed on a path of the first beam reflected by the first reflective mirror and on a path of the second beam reflected by the second reflective mirror. An optical axis of the polarizing beam combiner is not parallel to the first beam. The polarizing beam combiner is configured to guide the first beam and the second beam.

The present disclosure provides an integrated circuit (IC) structure. The IC structure includes an optical interposer having optical waveguides; a plurality of chip stacks disposed over the optical interposer, each of the plurality of chip stacks including a first photonic IC chip and a memory chip over the first photonic IC chip; and a plurality of first laser source chips disposed adjacent to the plurality of chip stacks, respectively, wherein the optical waveguides in the optical interposer are configured as an optical interconnect structure to couple with the memory chip through the first photonic IC chip.

The invention relates to a construction method of a photon neural network, an image processing method, equipment and a medium, and the construction method comprises the steps: forming a silicon waveguide on a silicon-based substrate, periodically arranging phase change units on the surface of the silicon waveguide to form a two-dimensional array, and constructing a phase change metasurface with a beam splitting function by regulating and controlling the state of the phase change units. An input port and an output port are connected through a tapered waveguide to form an optical power beam splitter; output optical signals pass through a crossed waveguide and a directional coupler and are arranged according to a convolution kernel matrix structure, and a photon convolution kernel is constructed. A multi-wavelength laser source, an optical modulator and a photoelectric detector are integrated, the state of a phase change unit is dynamically regulated and controlled, and a photon neural network is established. And after matrix operation, the optical signal is converted into an electric signal by the photoelectric detector and is output to the processing module, so that the network performance is remarkably improved, and an efficient and low-energy-consumption scheme is provided for deep learning.