120 results about "Ring laser" patented technology

The embodiment of the invention discloses an adjustable ring laser welding system and method based on intelligent laser-assisted wire filling. According to the method, a laser emitting module is used for emitting a corresponding laser beam to the surface of a welding piece, and the shape of the laser beam is adjustable and annular; the wire filling module is used for conveying welding wires to the welding part; and the feedback module is used for acquiring the temperature and morphology in a molten pool corresponding to a welding part in the welding process to generate corresponding real-time monitoring data, and determining a feedback signal of the laser emission module and a feedback signal of the wire filling module based on the real-time monitoring data. According to the embodiment of the invention, intelligent and self-adaptive adjustment of the welding process can be realized through multi-dimensional information fusion and closed-loop control, the dependence on skills of operators is reduced while the welding quality is improved, and the production efficiency and the product yield are improved.

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.

A semiconductor tunable ring laser including a laser cavity having a closed loop optical path, and an optical filter that is arranged within the laser cavity. The optical filter includes a first MZI-based tunable frequency filter section including a 1×3 MMI input splitter providing a first non-zero fraction, T1, of optical radiation at a first optical output port of the 1×3 MMI for wavelength locking and / or power monitoring purposes outside of the laser cavity, a second fraction, T2=(1−T1) / 2, of optical radiation at a second optical output port of the 1×3 MMI, and a third fraction, T3=(1−T1) / 2, of optical radiation at a third optical output port of the 1×3 MMI. A PIC including the semiconductor tunable ring laser, and to an opto-electronic system including such a PIC.

The present invention relates to the technical field of laser welding. Disclosed are a method for establishing a point-ring laser welding heat source model, a system and a medium. A point-ring laser is composed of point light of a central laser body heat source and ring light of an annular laser surface heat source, the point light is used for achieving a weld seam having a high depth-to-width ratio for a welded material, and the ring light is used for achieving auxiliary heating and slow cooling for the welded material. According to the method for establishing a point-ring laser welding heat source model provided in the present invention, the laser power ratio of the point light to the ring light in the model can be regulated and controlled according to any proportion, the defocusing amounts of the point light and the ring light can be separately controlled, and spot parameters such as point light spot diameter and ring light spot diameter can be used for effectively expressing heat flux density distribution. The method for establishing a heat source model provides a powerful reference basis for accurately simulating a temperature field, a stress field and a deformation field of point-ring laser welding. On the basis of regulation and control of a welding path, the present invention can be widely applied to the field of finite element simulation of point-ring laser linear welding and weaving welding.

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.

A system and method for generating ultra-short pulses intended to be inserted into a ring laser with a regulator of a pulsed signal of a certain intensity, the system includes an optical attenuator that allows the intensity of the pulsed signal to be adjusted at the input of an optical guide section, and a distributed amplification device inserted in the optical guide that make it possible to manage the power of the signal therein, so that it propagates as solitons or as self-similar pulses without suffering unwanted distortions despite the increase in the length of the laser cavity, increasing the power of the pulsed signal and making it possible to exceed the usual power limits of this type of laser.

The present invention discloses a calibration method for a ring laser gyro based on the zero position signal of a circular grating encoder, which relates to the field of measurement and control technology and instruments. By establishing a measurement model of the ring laser gyro; using the measurement data of the ring laser gyro and the zero position signal of the circular grating encoder collected respectively when the turntable is stationary and when the turntable rotates uniformly forward and backward, the offset coefficient, scale factor and angular increment value of the measurement model of the ring laser gyro are calibrated. Based on the zero position signal of the circular grating encoder and the principle of circumferential closure, the scale factor in the measurement model of the ring laser gyro is calibrated, thereby calibrating the ring laser gyro. The present invention can be applied to the precise measurement and calibration of the dynamic motion parameters of the turntable.

The present invention provides a method and system for calibrating a circular grating encoder based on a ring laser gyroscope. The method specifically includes the following steps: S1: Obtain the angular increment measurement value RNi of the ring laser gyroscope and the angular displacement measurement value OMi of the circular grating encoder synchronously measured under the trigger of a synchronization signal, where i = 0, 1, …, N; S2: Taking the angular displacement measurement value OMi of the circular grating encoder as the zero point, calculate the angular displacement value RMj of the ring laser gyroscope, where j = 1, …, n; S3: Calculate the error based on the angular displacement measurement value OMi of the circular grating encoder and the angular displacement value RMj of the ring laser gyroscope, and establish a measurement model of the circular grating encoder according to the error calculation result.

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.

The invention relates to traction-type trenchless pipeline repair intelligent equipment which comprises a conical guide head and a circular repair part which are detachably connected through a first connecting part and a second connecting part. The conical surface of the guide head is provided with an annular laser emitter to detect the internal environment and damage position of the pipeline, the large end is provided with a servo motor, a transmission shaft is connected with a spiral push rod, and an inclined block at the end of the push rod is inserted into a guide hole of a sealing stop block of the repair part. The outer surface of the repairing part is provided with two groups of sealing stoppers, the side nozzle is connected with a repairing liquid high-pressure pump, the stoppers and the outer surface of the repairing part form a groove, a wound expansion ring is arranged in the groove, the volume of two ends of the expansion ring is adjusted through threaded connecting rods, and the inner wall is in contact with the inclined block. The equipment ensures that the coiled material is attached to the inner wall of the pipeline through primary repair of the repair liquid, secondary repair of the expansion ring coiled material and fine adjustment of the inclined block.

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.

The present invention provides a cable-type wire laser arc coaxial composite additive manufacturing device and manufacturing method, the device comprising: a substrate; a ring laser system comprising a laser and a laser mirror group, the laser being able to emit a laser beam and transmit it to the laser mirror group via an optical fiber, wherein the laser beam forms a hollow ring-shaped laser beam under the action of the laser mirror group; a GMAW welding system comprising a GMAW power supply, a GMAW welding torch, a wire feeder, and a cable-type wire, the cable-type wire being connected to the wire feeder and fed into the GMAW welding torch via the wire feeder, the cable-type wire being coaxial with the hollow ring-shaped laser beam, the negative pole of the GMAW power supply being connected to the substrate, and the positive pole being connected to the cable-type wire via the GMAW welding torch; the cable-type wire being a stranded wire structure formed by twisting at least three branched wires, a rotating arc being formed between the cable-type wire and the substrate, and the hollow ring-shaped laser beam and the rotating arc forming a coupled heat source; the present invention can effectively improve the operational flexibility and convenience of additive manufacturing while ensuring the cladding efficiency, thereby achieving stable and efficient additive manufacturing of titanium alloys.

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 semiconductor tunable ring laser including a laser cavity having a closed loop optical path, and an optical filter that is arranged within the laser cavity and configured as a transmission-type optical filter if the semiconductor tunable ring laser is in use. The optical filter includes a first MZI-based tunable frequency filter section including a first 2×2 MMI output splitter having an x / (100−x) split ratio with x being unequal to 50. The first 2×2 MMI output splitter provides the laser cavity with an optical monitoring port that is presented with a first non-zero fraction, T1, of optical radiation that is sufficient for wavelength locking and / or power monitoring outside the laser cavity. A PIC including the semiconductor tunable ring laser, and to an opto-electronic system comprising such a PIC.

The present invention provides a deep penetration keyhole non-metallic inert gas (NIG) shielded welding quality monitoring system. This system uses a ring laser to perform three-dimensional scanning of weld gaps, misalignment, and other conditions before welding, as well as weld morphology during and after welding. Furthermore, it collects welding current, voltage signal data, arc sound signal data, arc morphology, and weld pool image data in real time during the welding process. This data is then comprehensively analyzed to enable real-time monitoring of welding quality. This system monitors the quality of deep penetration keyhole NIGG shielded welding through multi-dimensional data collection, significantly improving the efficiency and accuracy of quality testing for deep penetration keyhole NIGG shielded welding.

To provide a semiconductor tunable ring laser (1) including a laser cavity (2) having a closed loop optical path, and an optical filter (3) disposed within the laser cavity and configured as a transmission type optical filter when the semiconductor tunable ring laser is in use.SOLUTION: An optical filter includes a first MZI-based tunable frequency filter section (3a) including a first 2×2 MMI output splitter (9) having an x / (100-x) splitting ratio, and x is not equal to 50. The first 2×2 MMI output splitter provides the laser cavity with an optical monitoring port at which a first non-zero fraction T1 of optical radiation sufficient for wavelength locking and / or power monitoring outside the laser cavity is presented. The present invention also relates to a PIC (100) including a semiconductor tunable ring laser according to the present invention, and to an optoelectronic system (200) including such a PIC.SELECTED DRAWING: Figure 1

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.