41 results about "Erbium lasers" patented technology

The invention relates to a perovskite quantum dot-doped polymer dispersed liquid crystal and a preparation method thereof. The perovskite quantum dot-doped polymer dispersed liquid crystal is preparedfrom the following components, in parts by mass: 1-10 parts of perovskite quantum dots, 20-74 parts of a photosensitive polymer, 20-78 parts of a nematic liquid crystal, and 1-5 parts of a photoinitiator. The obtained perovskite quantum dot-doped polymer dispersed liquid crystal is applied to a random laser. The raw materials of the dispersed liquid crystal are simple and easy to obtain, the costs are low, and the obtained random laser has the characteristics of a short preparation period, a simple preparation process, low production costs, higher emission light intensity and a low thresholdvalue, so that the dispersed liquid crystal has broad application prospects.

The invention discloses a high-temperature three-dimensional digital image related measurement system and method based on a single camera, and belongs to the field of digital image application. The system comprises a He-Ne laser, an industrial camera, a plane mirror II, a plane mirror I, a plane mirror III, a beam expander, a collimating mirror, frosted glass and the like. Green random speckles are sprayed on a measured object to serve as identification points I, random red speckles are generated by a He-Ne laser through frosted glass to serve as identification points II, the identification points I move along with movement of the measured object, and the identification points II do not move. Displacement fields are respectively calculated for speckle images of the identification points Iand II, and the difference value of the two displacement fields is used as an actual deformation field of the measured object, so the influence caused by thermal disturbance is greatly eliminated. Thesystem is used for measuring the three-dimensional morphology and the deformation field of an object in a high-temperature environment, eliminates the measurement error caused by thermal disturbance,and enables the result to be more accurate.

The invention provides a supersonic wind tunnel flow field multi-camera three-dimensional calibration device, which comprises a particle storage tank and a wind tunnel test section, wherein the particle storage tank is connected with the wind tunnel test section through a high-pressure pipeline; the wind tunnel test section comprises a shell, a laser and a mirror group; the mirror group comprisesa reflector, a transverse semi-transparent and semi-reflective mirror and a longitudinal semi-transparent and semi-reflective mirror; the longitudinal semi-transparent and semi-reflective mirror and the reflector are sequentially arranged in an emitting direction of the laser device, and the transverse semi-transparent and semi-reflective mirror is arranged on the same horizontal plane of the reflector; the longitudinal semi-transparent and semi-reflective mirror is perpendicular to the side surface of the shell, and the transverse semi-transparent and semi-reflective mirror is perpendicular to the top surface of the shell; and an included angle between each of the two groups of semi-transparent and semi-reflective mirrors and the reflector is 90 degrees. The supersonic wind tunnel flow field multi-camera three-dimensional calibration device provided by the invention effectively solves the problem of supersonic multi-camera calibration.

The invention discloses an electron spin emission based terahertz spectrometer and spectral analysis system. The terahertz spectrometer comprises a fiber femtosecond laser which enables femtosecond light at a spatial light output port to enter a transmitting end; coherent detection light of the fiber output port is input to a receiving end through an optical delay line; a sample holder is positioned between the transmitting end and the receiving end; the transmitting end is used for generating terahertz pulses based on the electron spin effect of a hetero-structure under the combined effect offemtosecond laser excitation and an internal magnetic field; and the receiving end is used for forming a current under the effect of the sample terahertz pulse electric field, measuring the intensityof a specific terahertz pulse waveform point location based on the magnitude of the current, and outputting the intensity to a data acquisition and processing module so as to perform spectral analysis. Thus, the key performance indexes of the bandwidth and dynamic range of the terahertz time domain spectrometer can be effectively improved, the reliability of the whole spectrometer is improved, and the research difficulty and cost are effectively reduced.

The invention discloses a high-power semiconductor laser with the lasing wavelength of 852 nm, and belongs to the field of semiconductor lasers. The high-power semiconductor laser comprises a bottom plate, wherein an adjusting groove is formed in the position, which is close to the middle, of the upper end of the bottom plate, a limiting sliding groove is formed in the position, which is close to the middle, of the left inner side wall of the adjusting groove, a first shell is arranged in the adjusting groove, a limiting sliding block is arranged at the position, which is close to the bottom, of the left side of the first shell, a plurality of sets of tooth grooves are formed in the position, which is close to the bottom, of the right side wall of the first shell at equal intervals, and the first shell is movably arranged in the adjusting groove through cooperation of the limiting sliding block and the limiting sliding groove, a first groove is formed in the right side, which is close to the middle, of the bottom plate in a penetrating mode, a gear is movably arranged in the first groove, and the gear and the first shell are movably arranged through a tooth groove. According to the invention, a worker can finely adjust the position of the main body according to needs when using the laser, the heat dissipation effect of the semiconductor laser is improved, and the liquid bag absorbing enough heat can be replaced conveniently.

The invention belongs to the field of optics, and discloses a double-beam laser Doppler velocity measurement system adopting a phase modulator. The double-beam laser Doppler velocity measurement system comprises an infrared semiconductor laser, a red light indicating semiconductor laser, a coupler, the phase modulator, a first collimating lens, a second collimating lens, a receiving lens and an infrared light detector, wherein the infrared semiconductor laser and the red light indicating semiconductor laser are connected with one end of the coupler by means of optical fibers respectively, theother end of the coupler is connected with the phase modulator by means of an optical fiber, the phase modulator divides conducted infrared laser into two uniform paths, the two paths of infrared laser are conducted to the front end of the first collimating lens and the front end of the second collimating lens by means of optical fibers respectively, and light reflected by a moving object is focused to the infrared light detector by means of the receiving lens. The double-beam laser Doppler velocity measurement system solves the problems of complex technology and high cost of an original velocity measurement system adopting an acousto-optic frequency shifter for frequency shift.

A system for a vehicle may include a laser driver configured to produce a laser. The system may also include phased array optics provided at an output of the laser driver. The phased array optics may receive the laser. As such, the phased array optics may be within a pathway of the laser. The system may further include a controller configured to control the laser driver and the phased array optics to provide a variable field of vision pattern for a vehicle.

The invention discloses an intelligent fault diagnosis method for a multi-source physical monitoring quantity of a fiber laser system, and the method comprises the steps: building an intelligent fault diagnosis model for the multi-source physical monitoring quantity of the fiber laser system through time sequence signal data of the multi-source heterogeneous physical monitoring quantity of different functional parts in the fiber laser system; and performing real-time diagnosis and evaluation on the working state of each functional component and the overall operation state of the fiber laser system by using the model. The intelligent fault diagnosis method for the fiber laser system disclosed by the invention does not depend on professionals, can directly carry out real-time accurate evaluation on the operation state of each functional part of the fiber laser system, and carries out accurate positioning analysis on the fault part and reason of the fiber laser system according to the evaluation result; the consumption of manpower and material resources is greatly reduced, the production efficiency and the working performance of the laser can be guaranteed, and high-reliability and unmanned application of an optical fiber laser system in the fields of optical communication, industrial manufacturing and the like is possible.

The invention belongs to the technical field of gain materials, and discloses bismuth-thulium co-doped gain glass with an efficient broadband and a preparation method of the bismuth-thulium co-doped gain glass. The gain glass is mainly prepared from the following raw materials: GeO2, SiO2, Bi2O3 and Tm2O3; the molar dosage of the GeO2 is 10 to 40 percent, and the molar dosage of the SiO2 is 60 to 90 percent; the use amount of Bi2O3 is 0.001-5% of the total molar weight of GeO2 and SiO2, and the use amount of Tm2O3 is 0.01-5% of the total molar weight of GeO2 and SiO2. The method is a gas suspension furnace method. The gain glass provided by the invention has continuous ultra-wideband luminescence of 1000-2000 nm, and covers O, E, S, C, L and U wave bands. The method provided by the invention improves the luminous intensity of the glass material. The bismuth-thulium co-doped gain glass material is used as a gain medium to be used in the fields of optical fiber amplifiers and lasers.

The invention provides a laser system of an oral cavity laser therapeutic instrument. The laser system comprises a laser power supply, a laser head, a laser water cooling system, an optical fiber output system, a gas-water spraying system and a complete machine control system, wherein the laser power supply is used for providing energy for the laser head, the laser head comprises a total reflection mirror, an output mirror, a xenon lamp, a laser rod, a light condensation cavity and an optical turn, the laser water cooling system is used for cooling the laser rod and the xenon lamp of a laser device, a light guide output system is used for laser output and is composed of a beam expanding shaping mirror, a coupling focusing mirror and an optical fiber, the gas-water spraying system is used for spraying a gas-water mixture to tooth tissue under the action of laser so as to achieve the effects of reducing the temperature of the tissue in an irradiation area and participating in laser treatment, and a central control system is used for controlling parameters of the laser power supply, the laser water cooling system and the gas-water spraying system and coordination work among the subsystems. The laser system has the advantages of stable output laser energy, good light spot uniformity, high operation flexibility and the like.

The invention discloses a laser light path system and a method for processing a flexible circuit board by using the laser light path system. According to the key points of the technical scheme, the laser light path system comprises a laser, and the output end of the laser is provided with an acousto-optic deflector for splitting light; and laser divided into two beams by the acousto-optic deflector passes through a zoom beam expander and a half-wave plate respectively and then is combined into one beam through a polarization beam combiner, and a galvanometer scanning system and a focusing lensare sequentially arranged at the output end of the polarization beam combiner. The processing method comprises the following steps: continuously processing one hole site by using the focusing laser and the out-of-focus laser, moving the flexible circuit board, and continuously processing the other hole site. Compared with the prior art that all holes are punched through focusing laser and then punched through out-of-focus laser again, the continuous punching mode can greatly shorten the machining path, and therefore the machining efficiency is greatly improved.

The invention discloses a laser-based vehicle bottom accessory detection method. The detection method at least comprises the following steps: S1, completing position information acquisition of a vehicle bottom accessory based on a vehicle bottom design drawing; S2, on the basis of the position information, obtained in the S1, of the vehicle bottom accessories, completing vertical arrangement of all lasers on a detection platform, the arrangement positions of the lasers corresponding to all the to-be-detected vehicle bottom accessories respectively; and S3, moving the vehicle to be detected toa preset position on the detection platform, turning on each laser, and completing vehicle bottom accessory missing or installation position deviation detection based on the laser irradiation points of each laser. The detection method is an efficient and high-precision detection means, and each vehicle can be visually and directly detected and monitored in the whole production process. The detection result is visual, the detection size precision is extremely high, and the operation method is simple and efficient.

An additive manufacturing system is disclosed that comprises two or more lasers for precisely heating a fiber-reinforced thermoplastic feedstock and a fiber-reinforced thermoplastic workpiece in preparation for depositing and tamping the feedstock onto the workpiece. The system employs feedforward, a variety of sensors, and feedback to ensure that the feedstock and workpiece are properly heated.

The invention discloses a GaN-based echo wall laser based on a porous DBR, and a preparation method and application thereof. The GaN-based echo wall laser comprises a substrate, a buffer layer, a porous DBR layer, an n-type doped GaN layer, an active layer, an electron blocking layer and ap-type doped GaN layer, wherein the buffer layer is arranged on the substrate, and the periphery of the buffer layer is etched downwards to form a protruding part; the porous DBR layer is arranged on the protruding part and plays a role in limiting a light field; the n-type doped GaN layer is arranged on the porous DBR layer; the active layer is arranged on the n-type doped GaN layer; the electron blocking layer is arranged on the active layer; and the p-type doped GaN layer is arranged on the electron blocking layer. The bottom porous DBR reflector adopted by the invention has a good vertical limiting effect on the light field of the echo wall microcavity, leakage of part of the light field to the direction of the substrate cannot be caused, and the threshold power density of the prepared echo wall laser is relatively low.

The invention discloses a light emitting assembly and an optical module using the same. The light emitting assembly comprises a wavelength division multiplexing element, a light emitting port, a plurality of lasers and a thermoelectric refrigerating unit, wherein the light emitting port and the lasers are located at the two ends of the wavelength division multiplexing element respectively, and the lasers are installed on the thermoelectric refrigerating unit; one side of the wavelength division multiplexing element is provided with a plurality of optical input ports, the other side of the wavelength division multiplexing element is provided with an output port, the optical input ports correspond to the lasers respectively, and the output port corresponds to the light emitting port. According to the light emitting assembly, by designing the structural composition and position of each component, each component can be directly mounted on the tube shell base when forming the light module, so that a carrier plate playing a role in bearing is saved, the material cost of the optical module is reduced, and meanwhile, the assembly process of the optical module is simplified.

The invention discloses an SBG semiconductor laser device using an electrode to realize sampling. A seed grating of the SBG semiconductor laser device is a common uniform grating, and a conductive region above an electrode and a ridge strip is designed into a sampling pattern shape, so that the feedback effect of a grating structure on light is the same as that of a sampling grating. According to the SBG semiconductor laser device, a sampling structure does not need to be introduced into the uniform grating, and the same feedback effect of the sampling grating on light and the selection effect on lasing wavelength can be realized.

The invention belongs to the technical field of laser, and provides a 213nm ultraviolet light output method and system. The method comprises the steps of controlling a laser to generate a laser pulse, enabling the laser pulse to generate 532nm frequency-doubled light after passing through a frequency doubling crystal, and enabling the 532nm frequency-doubled light and residual 1064nm fundamental frequency light to generate 266nm laser pulse after passing through a quadruplicated frequency crystal, and enabling the 266nm laser pulse and the residual 1064nm fundamental frequency light to be irradiated to a frequency quintupled crystal so as to generate 213nm ultraviolet light. According to the method provided by the invention, the problem that polarization needs to be converted in the process of generating the 213nm laser pulse by performing sum frequency on the frequency doubled light and the frequency tripled light can be avoided.

The invention discloses a laser marking method safe for human eyes, which is characterized in that an all-fiber laser with the optical wavelength between 1.52 microns and 1.59 microns is provided, pulse laser is output by the all-fiber laser, the pulse laser is irradiated to a workpiece to be processed after being amplified and focused, and laser marking is realized through relative movement of a focusing position and the workpiece to be processed; wherein the pulse laser is composed of pulse trains, each pulse train comprises 2-6 pulses, the pulse width of each pulse is smaller than 10 picoseconds, the interval between every two adjacent pulses is smaller than 50 nanoseconds, one million to ten million pulse trains are included per second, and finally output single pulse energy is not larger than 100 nanojoule. The laser adopted by the invention has a high damage threshold to human eyes, and can be suitable for surface marking of metal materials, composite materials, transparent materials, organic materials and the like.