82 results about "Ring laser" patented technology

The invention discloses a method and equipment for detecting a getter of a ring laser based on machine vision, and belongs to the technical field of laser gyroscope detection. According to the method, the thin film image of the getter is collected, the consumption condition of the getter is recognized by combining the color fading property of the getter after the getter reacts with the impurity gas, meanwhile, the getter parameter and the activation parameter of the ring laser are calculated according to the working condition data of the ring laser during standing and working, and the residual gas capacity of the getter is predicted based on the activation parameter. And combining the suction parameters to fit a suction characteristic function of the ring laser, and further predicting the remaining working time of the getter. According to the method, products with unqualified getter allowance can be effectively screened out, and the application reliability of the ring laser in the fields of aviation, spaceflight and the like is improved.

The invention discloses a solidification melting zone thermal compensation repairing device and method for adjusting a heat source mode, and belongs to the technical field of metal part repairing. In the traditional Gaussian laser single crystal repairing process, columnar crystal orientation isometric crystal transformation can be induced due to the violent heat dissipation effect on the top of a molten pool and the component supercooling effect of the solidification front edge, new crystal grains preferentially nucleate and grow on the top of the molten pool, and the mixed crystal defect on the top of a repairing layer is caused. The scheme that annular laser is adopted as main laser, a thermal compensation auxiliary laser beam and a zoom laser beam expander are added for cooperative regulation and control is provided, the temperature gradient and the cooling speed of a molten pool are controlled by accurately adjusting a heat source energy distribution mode, the tendency of columnar crystal orientation isometric crystal transformation is restrained, and the quality of the molten pool is improved. And mixed crystal defects at the top of the repair layer are eliminated. Compared with an existing method, the method is large in process window and good in parameter adaptability; the material application range is wide, and the repairing requirements of different alloy systems can be met; equipment adjustment is simple, and industrial application is easy to achieve.

The invention discloses an SLM printed metal part high-efficiency and high-precision forming quality optimization method based on a point ring laser, which comprises the following steps: S1, dividing a three-dimensional model of a to-be-formed metal part into a core region, a lap joint region and a shell region, and slicing the three-dimensional model of the to-be-formed metal part, obtaining slice information of each slice layer; s2, dynamically adjusting the overlap amount of a transition area according to the geometrical characteristics of the three-dimensional model; and S3, a point ring laser is adopted for sequentially conducting selective laser melting forming on all the slice layers according to the slice information of all the slice layers, and then SLM forming of the to-be-formed metal part is completed. On the basis, the printing quality of the to-be-formed metal part is improved on the basis of ensuring high efficiency and high precision of the SLM printing metal part.

The invention discloses an O-band harmonic mode-locked laser based on double-pumping nonlinear polarization evolution, which comprises a first pumping source, a second pumping source, a first wavelength division multiplexer, a second wavelength division multiplexer, a gain fiber, a first polarization controller, a polarization dependent isolator, a second polarization controller and a coupler, which form a bidirectional pumping ring laser resonant cavity. Wherein the first polarization controller and the second polarization controller are arranged on the two sides of the polarization dependent isolator respectively to form a nonlinear polarization evolution mode locking structure together. By improving the power of the double pumping sources and adjusting the polarization state in the cavity, switching from fundamental frequency mode locking to multi-order harmonic mode locking can be achieved, the highest order can reach 33, the repetition frequency upper limit of an O-band all-fiber mode-locked laser is broken through, and the all-fiber mode-locked laser has the advantages of being compact in structure, high in damage threshold, low in cost and easy to integrate all fibers and is suitable for the field of optical communication and the like.

The invention provides a multi-focus point ring light spot generation system and a laser welding method, and belongs to the technical field of laser machining. The system comprises an annular light source, a first collimating lens, an annular light beam generation module and a first reflecting mirror which are sequentially arranged at intervals along a first linear direction, and a point light source, a second collimating lens, a first focusing mirror, a multi-curvature hollow reflecting mirror and a second focusing mirror which are sequentially arranged at intervals along a second linear direction, the center of the multi-curvature hollow reflecting mirror and the center of the second focusing mirror are provided with through holes for light beams emitted by the point light source to penetrate through, and the mirror surface curvature of the multi-curvature hollow reflecting mirror is adjustable. The technical problems of high processing cost and poor deep welding stability caused by structural limitation of a point ring laser in the prior art can be solved.

The utility model discloses a ring piece rapid roundness correction device which comprises a base, a first round rod arranged on the base, a first sliding sleeve sleeved on the first round rod, a height adjusting mechanism arranged on the first sliding sleeve, a second sliding sleeve fixed on one side of the first sliding sleeve, a second round rod arranged in the second sliding sleeve in a penetrating mode, and a third sliding sleeve sleeved on the other end of the second round rod. A fourth sliding sleeve is fixed to one side of the third sliding sleeve, the lower end of a third round rod penetrates into the fourth sliding sleeve, a transverse sleeve is fixed to the top end of the third round rod, the rear end of a fourth round rod penetrates into the transverse sleeve, a laser base is hinged to the front end of the fourth round rod, and the laser base and the fourth round rod can be fixed after a screw on a hinge point of the laser base is tightened. And a large circular ring laser is fixed on the laser seat. The rapid roundness correction device for the ring piece can project a standard large circular ring, and can match the large circular ring to the inner ring and the outer ring of the ring piece by adjusting the height and the position of the large circular ring laser, so that the roundness of the ring piece can be rapidly corrected by referring to the standard large circular ring.

The application discloses a rare earth ion doped lithium niobate micro-ring laser and a preparation method thereof, and utilizes femtosecond laser direct writing combined with chemical mechanical polishing technology to prepare a micro-ring and a coupling waveguide shape on the surface of a lithium niobate film doped with rare earth ions, and further realizes a micro-ring laser on a lithium niobate sheet. The application can realize low-cost mass production of the micro-ring laser on the sheet, and has important significance in optical communication, photonic integrated circuit, precision measurement and large-scale sensing and the like. Meanwhile, the laser based on the thin film lithium niobate micro-ring can generate multi-mode laser near multiple wave bands, and is a multi-wave channel light source with wide application prospect in optical communication and biosensors.

This invention discloses a laser cladding titanium alloy coating on an aluminum alloy substrate and its preparation method. The invention uses a self-developed small-beam, high-energy ring laser to replace the traditional laser, enabling effective metallurgical bonding between the aluminum alloy substrate and molten titanium alloy powder to form a fusion layer. This fusion layer then facilitates the successful preparation of a high-performance titanium alloy coating on the aluminum alloy surface. The prepared laser cladding coating exhibits a dense overall structure, free from defects such as cracks and pores. The aluminum alloy substrate remains undeformed, demonstrating high interfacial bonding strength and excellent wear and corrosion resistance. It effectively resists the attack of chloride ions from atmospheric and marine environments on the aluminum alloy substrate, thereby significantly extending the service life of aluminum alloy components. This invention overcomes the challenge of preparing titanium alloy coatings on aluminum alloy surfaces using laser cladding, and also provides a new approach and theoretical basis for metal protection, showing promising application prospects.

The invention discloses a machining device and method based on point ring laser, relates to the technical field of additive manufacturing, and can improve the additive manufacturing forming efficiency and the mechanical property of a machined component. According to the scheme, an ultrafast laser source is used for generating ultrafast laser, an optical fiber laser source is used for generating optical fiber laser, a spatial light modulator is arranged on an emergent light path of the optical fiber laser and used for modulating light spots of the optical fiber laser into points and / or rings, and modulated optical fiber laser is obtained; the beam combining assembly is used for controlling the ultrafast laser and the modulated fiber laser to generate a composite beam, and the scanning assembly is used for controlling the composite beam to scan raw materials according to a scanning path to generate a molten pool for additive manufacturing so as to perform additive manufacturing based on the molten pool.

The application discloses a Fourier domain mode locked laser based on a laser dynamic establishment process and a control method, and comprises a ring laser cavity which is composed of an optical amplifier, a first isolator, a second isolator, an adjustable filter, a delay optical fiber, a coupler and a polarization controller or an optical amplifier, a first isolator, a second isolator, an adjustable filter, a delay optical fiber, a coupler, an intensity modulator and a polarization controller. When the dispersion amount in the ring laser cavity exceeds the bandwidth range of the adjustable filter, the optical amplifier or the intensity modulator is controlled to restart, so that the laser signal is restarted instead of the signal in the continuous gain cavity, the residual dispersion in the cavity is resisted, high coherent swept laser output is realized, any dispersion compensation technology is not needed, the scheme is simple, the requirements of the devices used for the laser are low, environment control technology is not needed, the scheme has strong robustness, the cost is reduced, and the Fourier domain mode locked laser can be applied to any waveband.

The application discloses an optical glass lens testing equipment, and belongs to the technical field of optical detection. The optical glass lens testing equipment comprises a testing seat, a testing disc is arranged on the testing seat, an opening is formed in one end of the testing disc, an optical glass lens feeding disc is arranged at the opening, an inner disc body is arranged on the testing disc, the inner disc body is connected with a testing turntable through a rotating piece, and the testing turntable is connected with a suction self-rotation piece for driving the optical glass lens to rotate through a plurality of connecting support pieces. The optical glass lens is driven to revolve around a circle by the testing turntable, and the self-rotation is driven by a self-rotation gear ring, so that the detection of the optical glass lens is simultaneously completed in the moving process. The geometric center of the lens is vertically irradiated by a light emitter, and whether the light signal is received by a ring laser receiver is used to directly judge the offset between the geometric center and the optical center, so that the detection of the optical glass lens is achieved, and the detection precision is high, and the detection efficiency is significantly improved.

A ring laser includes an optical amplifier, a birefringent resonator, a polarizing beamsplitter, and a bandpass filter forming a ring cavity. The resonator has a first series of resonances corresponding to a first linear polarization and a second series of resonances corresponding to a second linear polarization orthogonal to the first linear polarization. The ring laser generates intracavity pump light having the first linear polarization. The resonator generates stimulated Brillouin laser (SBL) light in response to the pump light coupling to a first resonance of the first series of resonances, the SBL light having the second linear polarization. The resonator generates dissipative Kerr solitons in response to the SBL light coupling to a second resonance of the second series of resonances, the dissipative Kerr solitons having the second linear polarization. The solitons form a frequency comb that is coupled out of the ring cavity via the polarizing beamsplitter.

Systems and methods here may include improved tunable lasers having a tunable filter and a tunable channel selector that can control precisely the wavelength and the bandwidth of the light emitted by the laser, while suppressing light that may otherwise be emitted by the laser outside the desired wavelength and bandwidth with unidirectional ring lasers having a resonator of which forms a ring and where light propagates only in one of the two possible directions.

The application discloses a coaxial composite laser welding method and a welding method of a flat wire motor winding, relates to the technical field of laser welding, and adopts a coaxial composite laser beam to act on the surface of high-reflectivity material to form a welding molten pool. The coaxial composite laser beam comprises an outer ring laser beam and a core laser beam. The outer ring laser beam is a pulse laser beam, and the core laser beam is a continuous laser beam. The continuous laser beam forms a main molten pool, and the pulse laser beam forms an auxiliary molten pool. The main molten pool and the auxiliary molten pool have an overlapping portion. The application combines the continuous laser and the pulse laser, the main molten pool formed by the continuous laser is in overlapping communication with the auxiliary molten pool formed by the pulse laser, the pulse laser forms disturbance to the molten metal in the auxiliary molten pool, drives the molten metal in the main molten pool to have an oscillation stirring effect, can increase the laser energy absorption efficiency of the high-reflectivity material, improves the welding penetration, can optimize the energy distribution of a heat source by adjusting the energy proportion and the focus point position, accurately controls the energy state of the heat source, and realizes zero spatter.

The present disclosure relates to hybrid metal-oxide semiconductor capacitors with enhanced phase tuning, the disclosed embodiments improve the efficiency of phase tuning for optical devices such as hybrid semiconductor-on-metal capacitors (MOSCAPs) III-V / Si micro-ring lasers. The present disclosure integrates silicon devices into the waveguide structure of the optical devices disclosed herein, for example, waveguide resistor heaters, waveguide PIN diodes, and waveguide PN diodes. In some examples, these optical devices are MOSCAPs formed by a dielectric layer between two semiconductor layers, which achieve a small phase tuning via plasma dispersion and / or carrier dispersion effects that occur depending on the polarity of the bias voltage. According to the embodiments disclosed herein, the plasma dispersion and / or carrier dispersion effects are enhanced by heating, carrier injection, and / or additional plasma dispersion based on the disclosed silicon devices integrated into the waveguide.

The invention belongs to the technical field of deep hole detection, and particularly relates to a deep hole detection device and method based on the optical principle, the device comprises a detection head and a calculation unit, the detection head comprises an annular laser generator, a rotating surface reflector and an endoscope; the endoscope is fixedly connected with the annular laser generator, and the annular laser generator and the rotating surface reflector are both coaxially arranged with the deep blind hole; the annular laser emitted by the annular laser generator is reflected by the rotating surface reflecting mirror, is converged at one point and then is divergently irradiated on the inner wall of the deep blind hole, and is used for acquiring an annular laser image on the inner wall of the deep blind hole and sending the annular laser image to the calculation unit; and the calculation unit is used for calculating point cloud coordinates of the cross section of the deep blind hole according to the annular laser image on the inner wall of the deep blind hole, and calculating geometrical characteristics of the deep blind hole according to the point cloud coordinates. According to the invention, high-precision detection can be realized, and the production quality of special-shaped deep hole parts is effectively improved.

A tunable ring laser having a ring cavity, the ring cavity comprising: a tunable ring resonator; a phase modulator; an optical coupler, wherein the optical coupler is optically connected with the tunable ring resonator; and a reflector arranged to couple a first propagation mode with a second propagation mode, the second propagation mode being opposite the first propagation mode.

A clock (100) comprising a plate (101) and at least one body (102, 102') arranged to define a closed-loop optical path for at least one first laser beam traversing the optical path in a first direction through a plasma-based amplifying medium (110). A mirror (105) is movable and associated with an actuator (108) connected to an electronic processing unit (114) to modify a length of the optical path. A shaking mechanism (113) is positioned between the plate (101) and the body (102) to subject the body (102) to a shaking motion. The amplifying medium (110) is arranged to generate, in the first direction, two waves of the same linear polarization. The processing unit (114) is arranged to control the actuator (108) so that the waves have substantially the same intensity.The detector (107) is arranged to provide a first signal, representative of a beat frequency between the waves of the first beam, constituting a clock signal. Vehicle equipped with such a clock. FIGURE IN ABRIDGED DIAGRAM: Fig. 1.

The invention discloses a calibration tool suitable for multi-camera image splicing of an annular laser sensor and an image splicing method, the calibration tool comprises at least one calibration block, and each calibration block enables annular laser stripes to have different deformations in an overlapping area which can be irradiated by a camera. The annular laser stripe is a closed laser stripe formed by combining one or more laser stripes with the same or different shapes; the overall size of the calibration tool is larger than that of the laser stripes; when in use, the calibration tool is arranged right below the annular laser sensor and is located on a laser projection plane of the laser. The image splicing method comprises the following steps: acquiring a calibrated laser stripe image; image feature recognition is completed, image splicing is completed according to the features of the laser stripes at all the calibration blocks, a homography matrix between the images shot by all the cameras is obtained, and therefore a complete image is spliced. The method mainly solves the problem that multi-camera image splicing features are not easy to identify.

The invention provides a shaft part static surrounding laser repairing method based on machine learning, relates to the field of metal part laser repairing, and solves the problems that in static shaft part online repairing, due to real-time change of a cladding angle, a molten pool is unstable in morphology and abnormal in flowing behavior, traditional repairing process parameters are single and cannot be matched, and the repairing efficiency is low. And a traditional dismounting-repair-mounting mode is high in cost and long in downtime, and secondary fault risks exist. After damage evaluation and pretreatment, a machine learning model is constructed through a full-angle pre-research test, 360-degree partition repair is conducted, process parameters are dynamically compensated in real time, cladding shaping is conducted layer by layer, and high-precision repair is completed through aftertreatment and quality inspection. Disassembly-free online repairing of the static shaft part is achieved, full-angle process parameters are dynamically adapted through machine learning, molten pool distortion is restrained, defects are reduced, the consistency and precision of a repairing layer are improved, the downtime is shortened, the cost is reduced, the secondary fault risk is eliminated, and the high-precision remanufacturing requirement is met.

The application discloses an organic flexible single-crystal micro-ring, a preparation method of a laser and application of the organic flexible single-crystal micro-ring. The organic flexible single-crystal micro-ring is obtained by self-assembly of organic molecules with multiple gain states and flexible groups, and can be used as a laser. The prepared micro-ring cavity has a high-quality ring resonant structure and multiple gain energy levels, and can simultaneously output a dual-color laser signal. The relative strength of the dual-color laser signal can sense a degree of strain, and a function of sensing stress deformation based on the laser signal is realized. The single-crystal micro-ring laser can reflect the degree of deformation through the relative strength ratio of different laser signals, is more intuitive, and has a larger range of sensed deformation. The self-assembly method for the ring structure provided by the application has less lattice defects of the prepared material compared with a semiconductor micro-processing technology (such as evaporation, etching, etc.), and can provide a molecular-level smooth crystal surface, and reduce optical loss.

The invention discloses a wind power bearing ring laser repair layer ultrasonic vibration turning device and method, and belongs to the technical field of wind power bearing repair layer machining equipment. The wind power bearing ring laser repair layer ultrasonic vibration turning device specifically comprises a base, a spindle box arranged above the base and an ultrasonic machining platform arranged in parallel with the spindle box; a rotary workbench used for installing a bearing ring to be machined is arranged on the side edge, adjacent to the ultrasonic machining platform, of the spindle box, and the rotary workbench is rotationally arranged on the side edge of the spindle box through a bearing assembly in the spindle box. The ultrasonic machining platform comprises an ultrasonic vibration device used for machining the bearing ring and an X-axis and Y-axis adjusting platform used for adjusting the ultrasonic vibration device. The ultrasonic vibration system is coupled to the high-precision transmission system, damage and residual stress of the laser cladding ceramic reinforced repair layer can be effectively reduced, the heterogeneous material removal effect is good, and stripping of hard particles of the ceramic reinforced repair layer and adhesion stripping of a base body in the machining process are remarkably reduced.

The invention discloses large-scale wind power bearing ring laser cladding repairing equipment and method, and belongs to the technical field of high-end equipment remanufacturing, the large-scale wind power bearing ring laser cladding repairing equipment comprises a swing mechanism used for installing a bearing ring and a laser cladding head used for machining the bearing ring, and the laser cladding head is controlled through a three-axis linkage device; the slewing mechanism comprises a clamping structure used for clamping the bearing ring and a driving structure used for driving the clamping structure, the clamping structure is connected with the driving structure through a speed reducer, and the clamping structure comprises an adjustable clamping jaw used for clamping the bearing ring and a chuck used for installing the clamping jaw. The repair requirements of large-size, thick-wall and heavy-load rotary parts can be met, and the blank of large rotary mechanism laser cladding repair equipment is filled up. The clamping structure has the functions of flexibly adjusting, positioning and clamping, can be used for large-scale division bearing rings with different sizes and different curvatures after being adjusted, and is suitable for repairing rotary parts with complex shapes.

The application discloses a fixed-intercept zooming ring pumping orthogonal polarization controllable vortex double-ring laser, which comprises a fiber-coupled output semiconductor laser array (1), a plano-convex lens (2), a fixed-intercept zooming ring pumping beam generating system (3), a first conical mirror (4), a laser gain medium (5), a V-shaped crystal conical mirror (6), a plane mirror (7) and a second conical mirror (8). The laser can realize orthogonal polarization controllable vortex double-ring laser output, and the topological charge number of the laser vortex phase can be continuously adjusted. The fixed-intercept zooming ring pumping system can make the laser maintain high mode matching degree during the adjustment process. The spin angular momentum and the orbital angular momentum carried by the laser beam can improve the particle trapping efficiency and reduce the thermal damage of the biological cells caused by the laser beam. The double polarization characteristics of the inner ring tangential and the outer ring radial can be fully utilized, the particle can be captured, and high-resolution imaging can be performed at the same time, so that the application of the vector vortex light field in the biomedical field can be greatly expanded.

The invention discloses a laser processing system. The laser processing system comprises a laser, a beam expanding module, a polarization module and a spatial light modulator. The laser is used for providing Gaussian laser. The beam expanding module is used for carrying out beam expanding processing on Gaussian laser provided by the laser. And the polarization module is used for carrying out polarization processing on the Gaussian laser after beam expansion processing. The spatial light modulator, the beam expanding module, the polarization module and the spatial light modulator are sequentially arranged in the direction of Gaussian laser generated by the laser, and the spatial light modulator is used for loading a multi-ring aperiodic distribution phase diagram on the Gaussian laser, converting the Gaussian laser into a multi-ring laser beam and machining a workpiece to be machined through the multi-ring laser beam. By means of uniform multi-ring energy distribution of the multi-ring laser beams, full-coverage machining of the target machining area can be achieved at a time, the track filling step which must be carried out due to energy distribution limitation of Gaussian laser is not needed, the machining path is simplified, and therefore the machining time is shortened, and the machining efficiency is improved.

The invention relates to an insole capable of monitoring plantar pressure in real time, in particular to a high-precision plantar pressure monitoring system based on a fiber grating ring laser structure. The system comprises an insole body integrated with a fiber bragg grating sensor and an annular laser structure composed of a wavelength division multiplexer, an erbium-doped fiber and the like, the central wavelength 3dB bandwidth of the fiber bragg grating sensor is narrowed from 0.23 nm to 0.0175 nm by introducing the laser structure, the pressure measurement precision can be optimized from 2.4% FS to 0.18% FS according to 0.00457 nm / N sensor pressure sensitivity and 2100 N measuring range calculation, and the pressure measurement precision can be optimized from 2.4% FS to 0.18% FS according to 0.00457 nm / N sensor pressure sensitivity and 2100 N measuring range calculation. Dynamic pressure data are acquired and recorded in real time through the sweep frequency demodulator terminal equipment, and precise measurement of tiny changes of plantar pressure is achieved. And the requirements on high precision of the pressure sensor in the fields of sports biomechanical analysis, diabetic foot monitoring, athlete injury rehabilitation detection, scientific research level foot mechanics research and the like can be met.

The device comprises a laser device, an ultrasonic power source, a water cooling system, a laser welding gun, an ultrasonic transducer, an ultrasonic amplitude-change pole, the welding wire, a wire feeding device and an argon bottle, the laser welding gun is connected with the laser device and the argon bottle, the welding wire is connected with the wire feeding device, and the ultrasonic transducer is connected with the argon bottle. The ultrasonic amplitude-change pole is connected with the water cooling system, an ultrasonic electric signal output by the ultrasonic power source is converted into an ultrasonic vibration signal through the ultrasonic transducer, the vibration amplitude is amplified through the ultrasonic amplitude-change pole, and the welding wire is driven to vibrate in the axial direction. During annular laser coaxial fuse welding, the ultrasonic amplitude-change pole is in coaxial contact with the welding wire, and the laser focus is adjusted to be located on the surface of a workpiece, so that the welding wire can be directly inserted into a molten pool and cannot be molten before entering the molten pool. Therefore, ultrasonic waves are rigidly transmitted to the molten pool through the welding wire, the transmission efficiency of the ultrasonic waves is guaranteed, ultrasonic vibration of the molten pool is achieved, and a new thought is provided for improving the laser welding quality.

Disclosed are a multifocal point-ring spot generation system and a laser welding method in the technical field of laser processing. The system includes an annular light source, a first collimating lens, an annular beam generation module, and a first reflector arranged sequentially at intervals along a first straight-line direction, and a point light source, a second collimating lens, a first focusing lens, a multi-curvature hollow reflector, and a second focusing lens arranged sequentially at intervals along a second straight-line direction, where the multi-curvature hollow reflector and the second focusing lens are each provided with a through hole at their centers for allowing a beam emitted by the point light source to pass therethrough, and the multi-curvature hollow reflector has an adjustable mirror surface curvature. The system can solve the technical problems of high processing cost and poor stability in deep welding caused by structural constraints of point-ring lasers in the prior art.

A hybrid optical fiber amplifying device is proposed that is based upon a concatenated combination of a section of Tm-doped fiber (TDF) followed by a section of Ho-doped fiber (HDF). The doped fiber sections are configured to be no more than a few meters in length. Using the sections of doped fiber in this order (i.e., TDF followed by HDF) has been found to provide amplification of input signals over a relatively wide wavelength band from about 1725 nm to about 2105 nm (thus exhibiting a useful wideband range of about 380 nm). The use of pump beams operating at several Watts of power have been found to yield multi-Watt output signals. The wideband hybrid device itself may take the form of an amplifier, laser (including a ring laser configuration), or a source of amplified stimulated emission (ASE).