47 results about "Ring laser" patented technology

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 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 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.

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.

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 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 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.

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).

The application provides a frequency modulation type annular laser heating thin film thermal diffusivity transient measurement method and device, and relates to the technical field of thin film material thermal diffusivity measurement. The method comprises the following steps: generating a cosine electrical signal and converting the same into radio frequency power through a driving circuit to obtain a periodic heat flow with cosine distribution over time on the surface of a sample through laser modulation; the modulated light beam is expanded, phase shaped and bright spot eliminated to form an annular heating light beam and realize non-contact rapid heating and generation of a uniform annular heating zone; a micro displacement table is used to adjust a thermocouple probe to a light contact state on the back of the heating zone to collect an original temperature measurement signal; then, the signal is phase-locked amplified and post-processed to finally obtain the thermal diffusivity of the thin film. The application can significantly improve the non-destructiveness and high signal-to-noise ratio of the temperature measurement process, solve the problems of uneven heat flow distribution and large edge heat loss, and realize rapid and accurate evaluation and measurement of the thermal transport characteristics of the thin film.

The invention discloses a method for assisting in adjusting the thickness uniformity of a cold spraying coating through lasers, relates to the technical field of solid-phase additive manufacturing, and aims to solve the problem that Gaussian geometrical morphology characteristics of the cold spraying coating cannot be avoided through an existing morphology control mode of the cold spraying coating. And the technical problems of high difficulty in controlling the morphology of the coating and complicated subsequent machining process are solved. According to the method for assisting in adjusting the thickness uniformity of the cold spraying coating through the laser, a laser-assisted cold spraying system is utilized, the laser-assisted cold spraying system comprises a cold spraying mechanism and a laser-assisted heating mechanism, the laser-assisted heating mechanism is provided with an annular laser head, and the method comprises the steps that a coating is formed on a base plate through the cold spraying mechanism, the position of an annular laser head is adjusted according to the geometrical morphology of the coating, so that the annular laser head covers the edge of the single-pass Gaussian coating; and the laser-assisted cold spraying system is started, and laser-assisted adjustment is conducted on the thickness of the cold spraying coating by setting parameters of the cold spraying mechanism and parameters of the laser-assisted heating mechanism.

This invention provides a multi-focal point ring spot generation system and a laser welding method. [Solution] The system comprises annular light sources 11, a first collimator lens 12, an annular beam generation module 13, and a first reflector 14, arranged sequentially at intervals along a first linear direction; and point light sources 21, a second collimator lens 22, a first focusing lens 23, a multi-curvature hollow reflector 24, and a second focusing lens 25, arranged sequentially at intervals along a second linear direction. Through holes are provided in the centers of the multi-curvature hollow reflector and the second focusing lens through which the light beam emitted from the point light source passes, and the curvature of the mirror surface of the multi-curvature hollow reflector is adjustable. This solves the technical problems of conventional point-ring laser devices, such as soaring processing costs and reduced stability in deep welding, which are caused by structural constraints.

The application discloses a kind of O band harmonic mode-locked lasers based on double-pumping nonlinear polarization evolution, including first pump source, second pump source, first wavelength division multiplexer, second wavelength division multiplexer, gain fiber, first polarization controller, polarization-dependent isolator, second polarization controller and coupler, constitute bidirectional pumping ring laser resonator.Coupled with the first and second polarization controller is placed in polarization-dependent isolator two sides, jointly constitute nonlinear polarization evolution mode-locked structure.By improving the power of double pump source and adjusting the polarization state in the cavity, the switching from fundamental mode-locked to multi-harmonic mode-locked can be realized, with a maximum of 33 orders, breaking through the upper limit of the repetition frequency of O-band all-fiber mode-locked laser, with the advantages of compact structure, high damage threshold, low cost, easy to integrate into all-fiber, suitable for optical communication and other fields.

The present application relates to the technical field of metal welding and additive manufacturing, and provides a titanium alloy welding device and method coupled with multiple heat sources, the welding device comprising a ring laser system, a TIG welding system, a MIG welding system and a bypass shunt coordination control system, forming arc coupling between TIG and MIG and light arc coupling between laser and arc; the bypass shunt coordination control system is connected with the TIG welding system and the MIG welding system respectively, the bypass shunt coordination control system can shunt the main circuit current of the MIG welding system to the TIG welding system, and by adjusting the bypass current value flowing into the TIG welding system, the flexible switching of linear or curved welds is realized. The present application effectively solves the technical problems such as low wire cladding efficiency, poor adaptability, poor weld forming, uncontrollable heat input, unstable droplet transfer and the like in traditional laser additive manufacturing.

The utility model relates to the related technical field of laser cutting equipment, and one embodiment of the utility model provides a rope hook lantern ring laser cutting device which comprises a platform and a bottom frame, the bottom frame is fixedly connected with the platform, a pair of stabilizing legs are arranged on the surface of the platform, a material fixing assembly is arranged on the platform, and a door-shaped frame is fixed to the platform. The material fixing assembly comprises a bottom plate, the bottom plate is fixed to the bottom of the platform, a transverse hole is formed in the surface of the platform, a driving motor is arranged at the bottom of the bottom plate, the output end of the driving motor and the bottom plate are connected with conveying rollers, and the conveying rollers are located in the transverse hole. By means of the technical scheme, the technical problems that in the prior art, a traditional saw blade is low in cutting efficiency, large in dust amount and low in continuous cutting efficiency are solved.

The application discloses an underwater imaging device based on hollow square ring laser illumination, comprising a transmitting optical system, a receiving optical system, a system controller and an image display, the transmitting optical system comprises a laser group, a ring light modulation module and a ring lens modulation module, and is used for realizing underwater laser illumination; the receiving optical system is composed of a low-illumination imaging detector and a zoom imaging lens, and is used for collecting target information light under different imaging fields of view and realizing underwater imaging; the system controller is connected with the transmitting optical system and the receiving optical system in communication, and is used for coordinating and controlling each module in the device; and the image display is used for image display under the control of the system controller. The device has the advantages of low cost, small volume, low energy consumption, high portability and clear imaging, can be flexibly used for underwater security monitoring, handheld camera equipment, underwater robot imaging load and multiple purposes, and has a wide market space.

The application discloses a hollow protective cover laser radar, an obstacle avoidance method and application thereof, and comprises a laser generating component and a laser receiving component which are both mounted on a robot body, characterized in that the laser generating component emits a ring laser net L which surrounds the robot body, the laser receiving component comprises a mirror surface one and a mirror surface two which are arranged in parallel, a camera is mounted between the mirror surface one and the mirror surface two, the camera is located on the central axis of the robot body, and the area of the mirror surface two is smaller than that of the mirror surface one.

The invention provides a laser processing generation system and a laser processing method, and belongs to the technical field of laser processing. The system comprises an arc light path assembly and a point light path assembly, wherein the arc light path assembly comprises an annular light source, a first collimating lens, an annular light beam generation module and two double-sided roof prisms which are sequentially arranged at intervals along a first straight line direction; the point light path assembly comprises a point light source, a second collimating lens, a first focus lens, a hollow reflector and a second focus lens which are sequentially arranged at intervals in the second linear direction, and through holes allowing light beams emitted by the point light source to penetrate through are formed in the center of the hollow reflector and the center of the second focus lens. By adopting the laser processing generation system, the technical problem that the stability and quality of the processing process are poor due to the structural limitation of a point ring laser in the prior art can be solved.

The invention belongs to the technical field of metal additive manufacturing, and relates to an ultra-hard aluminum alloy short pulse-ring laser ultra-high-speed composite additive manufacturing method which comprises the following steps that at the same scanning speed, a ring laser beam is used for scanning and heating a base plate and alloy powder till the base plate and the alloy powder are molten to form a molten pool, and the center temperature of the molten pool is lower than the temperature of the peripheral area; meanwhile, a short-pulse laser beam is used for instantaneously scanning and impacting the central area of the molten pool so as to generate high-strain impact, and the annular laser beam and the short-pulse laser beam are coaxially compounded and synchronously move; and in the laser scanning deposition process, the spot diameter and power distribution of the annular laser beam are adjusted so that a molten pool can be stable, and meanwhile, based on the interlayer temperature, the peak power and the pulse frequency of the short-pulse laser beam are adjusted so that splashing cannot be caused by the instantaneous impact effect till composite additive manufacturing is completed. Controllable construction of a superhard aluminum alloy multi-phase structure can be achieved, and the forming precision and the defect inhibiting capacity are remarkably improved.

The present application relates to the field of optical communication technology, disclose a kind of wavelength tuning method based on external cavity double micro-ring laser, it solves the technical problems such as the large data quantity, long time consumption, easy to miss target wavelength and unable to simultaneously optimize side mode rejection ratio and line width etc. core performance index of existing traversal method to carry out wavelength tuning.The present application realizes the accurate analysis of the relationship between driving voltage and wavelength by establishing physical model and quadratic fitting relationship, avoids full-range current scanning;Utilize vernier effect under the wavelength selection mechanism of double micro-ring resonance peak alignment, ensure that output wavelength is accurately locked to protocol wavelength, performance is superior to approximate lookup table method;Through theoretical derivation and experimental calibration, the driving voltage corresponding to any reference wavelength can be predicted, which adapts to the individual differences of different micro-rings and realizes personalized rapid tuning;A large number of trial-and-error processes are transferred to simulation and theoretical calculation, which reduces the occupation and energy consumption of physical test equipment and improves production efficiency and production line resource utilization.

The invention provides an online health management method and system for a digital laser gyroscope, and the method comprises the steps: 1, an inertial reference system determines whether the digital laser gyroscope works normally or not according to a communication protocol; 2, when ground maintenance is carried out for the first time, the inertial reference system sends a health management system instruction to the digital laser gyroscope; 3, when the inertial reference system is powered on or restarted, the digital laser gyroscope sends a self-detection result, and functional integrity of components such as a gyroscope control circuit and an annular laser sensor is verified; 4, after feature parameter extraction is conducted on the health management data, the health conditions of all assemblies in the digital laser gyroscope and the overall health condition of the digital laser gyroscope are analyzed and evaluated in combination with the reference model containing the environmental stress factors, and an evaluation result is generated; and 5, the data storage management module carries out classified storage on the original data, the evaluation result and the degradation trend of the whole health management process, adopts a distributed database architecture and supports an incremental learning algorithm.

The application provides a kind of multi-focal point ring light spot generation system and laser welding method, belongs to laser processing technical field.The system includes ring light source, first collimating lens, annular beam generation module and first reflector arranged in turn along first linear direction with interval, point light source, second collimating lens, first focusing mirror, multi-curvature hollow mirror and second focusing mirror arranged in turn along second linear direction with interval, multi-curvature hollow mirror and second focusing mirror center are provided with the through hole for the light beam emitted by point light source to pass through, the mirror surface curvature of multi-curvature hollow mirror is adjustable.The technical problem of high processing cost and poor deep layer welding stability caused by the structure limitation of point ring laser in prior art can be solved.

The invention discloses a high-speed self-adaptive annular laser processing head and a laser processing method.The high-speed self-adaptive annular laser processing head comprises a rotary driving source, a mirror cavity assembly, a linear driving assembly, a laser transmission device and a lens assembly, and the mirror cavity assembly comprises a first shell, a second shell, a third shell, a fourth shell and a fifth shell; the first shell is located in the second shell and rotationally connected with the second shell, the second shell is connected with the output end of the rotary driving source, the second shell is rotationally connected with the third shell, the third shell is slidably connected with the fourth shell, and the fifth shell is rotationally connected with the fourth shell. The linear driving assembly is installed on the outer side of the third shell and is in driving connection with the fourth shell. The laser transmission device is connected with the upper end of the first shell and outputs laser downwards. The lens assembly comprises a collimating mirror, a first reflecting mirror, a second reflecting mirror and a focusing mirror. The direction of the emitted laser beam can be adjusted so as to adapt to different machining conditions.