320results about "Excitation process/apparatus" patented technology

The utility model discloses a laser with an expandable pumping source and portable laser processing equipment, and belongs to the technical field of lasers. Comprising at least one pumping source module, and the pumping source module comprises at least one pumping source body and a heat dissipation assembly; the heat dissipation assembly comprises a heat dissipation device and a heat dissipation base, the heat dissipation base is connected to one side, in the first direction, of the heat dissipation device, and the pumping source body is detachably arranged on the other side, in the first direction, of the heat dissipation base; according to the laser with the expandable pumping source, a corresponding number of pumping source modules can be matched according to the requirements of the laser with the expandable pumping source, so that the pumping source expansion of the laser is realized, and the corresponding pumping source body is cooled through the cooling assembly in the corresponding pumping source module, so that the cooling effect of the laser with the expandable pumping source is ensured, and the service life of the laser is prolonged. Meanwhile, due to the modular arrangement of the pumping source and the heat dissipation assembly, the reusability and adaptability of the pumping source module are improved, and the design and manufacturing cost is reduced.

Heterogeneous photonic circuits comprise a gain section optically coupled to a photonics section. The gain section can include at least one gain waveguide which can be formed from a III-V semiconductor material to provide optical gain. The gain waveguide can be coupled to optical components in the photonics section to form an integrated pump module. The photonics section can include a light-generating photonic circuit, which can comprise at least one waveguide doped with a rare-earth ion or transition-metal ion. Output from the integrated pump module and / or the light-generating photonic circuit can be tunable. Tuning can be implemented with feedback control.

The invention provides a transcendental extreme ultraviolet light source device which comprises a free electron laser main body which comprises an undulator system and an optical resonant cavity. The undulator system comprises a modulation section undulator and a radiation section undulator; the optical resonant cavity comprises resonant cavity reflectors and a dispersion section, and the modulation section undulator, the dispersion section undulator and the radiation section undulator are sequentially arranged in the direction of an electron beam and are all located between the resonant cavity reflectors; the resonant wavelength output by the radiation section undulator is 1 / h of the resonant wavelength of the modulation section undulator, h is the harmonic number, and when the resonant wavelength output by the radiation section undulator is 6-7nm, the radiation wavelength reflected by the resonant cavity is h times of the resonant wavelength output by the radiation section undulator, so that the resonant cavity is prevented from adopting a reflector with the reflection wavelength of 6-7nm. According to the device, the radiation of the target wavelength is output by using harmonic waves, and a reflector with relatively long wavelength and mature technology can be directly used; various accelerators are compatible, the energy efficiency of the accelerators is greatly improved, and power consumption is reduced.

Photonic particles and methods of using particles in biological samples are disclosed. The particles are configured to emit laser light when stimulated by, for example, pump source energy. The particles may include: a gain medium having an inorganic material, an optical cavity having a high refractive index, and a coating having an organic material. The particles may be less than 3 microns along their longest axis. The particles may be attached to each other to form, for example, doublets and triplets. The particles may be injection locked by coupling an injection beam into the particles during pumping, so that the injection seeds are amplified to develop into laser oscillations. The microscope system may include a pump source, a beam scanner, a spectrometer having a resolution of less than 1 nanometer and an acquisition rate of greater than 1 kilohertz, and a spectrum analyzer configured to distinguish the spectral peaks output by the laser from a broadband background.

The invention provides a low-ripple constant current source driving circuit for a laser, and relates to the technical field of laser driving, the low-ripple constant current source driving circuit comprises a direct current converter, an LCL filter circuit, a laser load and a current feedback circuit, an external power supply converts the direct current into stable direct current through the direct current converter, and the direct current is output by the direct current converter; direct current is input into the LCL filter circuit, current ripples in the direct current can be effectively reduced through an LCL filter, transient over-current peaks are restrained, then stable low-ripple driving current is formed, and a laser load is stably driven to operate. Secondly, sampling the actual current of the input end of the laser load in real time through a current feedback circuit, comparing the condition of the sampled actual current of the input end of the laser load with a set value, then calculating a control quantity, and adjusting the current output of the direct-current converter in real time through the calculated control quantity; and the stability of the laser during load operation is ensured.

The embodiment of the invention discloses a high-power high-repetition-frequency pulse constant-current discharge circuit and a pulse laser power supply, and the high-power high-repetition-frequency pulse constant-current discharge circuit comprises a multi-phase staggered parallel Buck circuit, an energy feedback circuit and a controller. The controller samples current in the multi-phase interleaving Buck circuit so as to perform time sequence trigger control on switching tubes in the multi-phase interleaving Buck circuit and the energy feedback circuit, so that charging and discharging of an energy storage inductor in the multi-phase interleaving Buck circuit and recovery of residual energy of the energy storage inductor after discharging are realized, and energy waste is reduced.

According to the optical fiber laser constant-current driving circuit and the optical fiber laser, through the combined design of the front-stage BUCK voltage reduction module and the rear-stage linear constant-current control module, the working efficiency of a driving power supply can be effectively improved, and ripples in output current can be remarkably reduced. The preceding stage BUCK voltage reduction module realizes efficient voltage reduction through switch control, ensures voltage stability, and reduces energy loss at the same time. And the backward-stage linear constant-current control module keeps the constancy of the current by accurately adjusting the output current, so that the current ripple is further reduced, and the high requirement of the fiber laser on constant-current driving is met. The design ensures that the circuit outputs stable and low-ripple constant current while efficiently converting voltage, and the performance and reliability of the fiber laser driving power supply are greatly improved.

The utility model relates to the technical field of depth cameras, and discloses a laser emission module and a depth camera, the laser emission module comprises a laser light source and a light source driving circuit, and the light source driving circuit comprises a voltage conversion circuit, a current sampling feedback circuit and a current switching circuit; the voltage conversion circuit is connected with a power supply and the current sampling feedback circuit, the current switching circuit is connected with the current sampling feedback circuit, and the current switching circuit is configured to be switched on or off based on a control signal of the control circuit so as to switch driving current output by the current sampling feedback circuit; the current sampling feedback circuit is configured to obtain real-time driving current of the laser light source and output feedback voltage to the feedback end based on the real-time driving current, and the voltage conversion circuit is configured to adjust the output current when the feedback voltage changes, so that the driving current is maintained at a target current value. The depth camera switches the driving current of the laser light source according to the working scene, and has a good recognition effect on objects with different reflectivity.

The invention discloses a driving circuit of a tunable laser, which comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a tenth resistor, a first operational amplifier, a second operational amplifier, a third digital potentiometer, a fourth operational amplifier, a first triode and a first voltage stabilizing diode, one end of the first resistor and one end of the fourth resistor are connected with a power supply, the other end of the first resistor is connected with the cathode of the first voltage stabilizing diode and the in-phase end of the second operational amplifier, and the anti-phase end of the second operational amplifier is connected with one end of the second resistor and one end of the third resistor. The output end of the second operational amplifier is connected with the other end of the second resistor and the anti-phase end of the first operational amplifier, the output end of the first operational amplifier is connected with one end of the tenth resistor and a second pin of the third digital potentiometer, and a seventh pin of the third digital potentiometer is connected with one end of the fifth resistor.

The invention provides a multi-module synchronous or asynchronous pulse laser control circuit and laser equipment. The multi-module synchronous or asynchronous pulse laser control circuit comprises a single-chip microcomputer controller, a pulse logic processing unit, a pulse amplitude modulation circuit, a laser global enabling switch circuit, a plurality of pulse control circuits and a plurality of laser driving circuits. The pulse control circuits are in one-to-one correspondence with the laser driving circuits. According to the embodiment of the invention, synchronous / asynchronous control can be carried out on the high-precision time sequence of the plurality of lasers, so that the plurality of pulse lasers are output in turn in the time domain, the high synchronization of the pulse lasers output by each laser can be realized, the peak power is ensured to reach a set index, and a better laser combination output effect is achieved.

The invention relates to the technical field of pump lasers, and discloses a coupling device and a coupling method for a reflector in a pump body, the coupling device for the reflector in the pump body comprises a pump body carrier component, and a light spot measurement component, a power supply component, a reflector suction component and a dispensing mechanism are arranged on the periphery of the pump body carrier component; a product is loaded on the pump body carrier component; a probe capable of moving to a product is arranged on the power supply part in a driving manner; a suction nozzle assembly used for obtaining the reflecting mirror is arranged on the reflecting mirror suction component in a driving mode. A light guide mirror component and a spectroscope component which are used for adjusting a light path are further arranged between the pump body carrier component and the light spot measuring component. The invention discloses a coupling device and a coupling method for a reflector in a pump body, and aims to confirm the position of the reflector and improve the efficiency and the coupling yield by arranging an optical path structure of the reflector in the pump body and adopting a combined mode of optical power measurement and light spot measurement.

An amplifier operable with an electric drive signal can amplify signal light having a signal wavelength. A laser diode has an active section with input and output facets. The facets are in optical communication with the signal light and are configured to pass the signal light through the laser diode. The active section is configured to generate pump light in response to injection of the electrical drive signal into the active section. The pump light has a pump wavelength different from the signal wavelength. A doped fiber doped with an active dopant is in optical communication with the signal light and is in optical communication with at least a portion of the pump light from the laser diode. The pump wavelength of the pump light is configured to interact with the active dopant of the fiber and thereby amplify the signal light.

A laser driving circuit and a related device are applied to the technical field of laser radars. The laser driving circuit comprises at least one laser unit, at least one energy storage unit, a driving unit, a first voltage control unit and a second voltage control unit, wherein the first end of the at least one laser unit is connected with the first end of the first voltage control unit, the second end of the at least one laser unit is connected with the first end of the driving unit, and the first end of the at least one energy storage unit is connected with the first end of the first voltage control unit; the second end of the at least one energy storage unit is connected with the first end of the second voltage control unit, the second end of the first voltage control unit is grounded, the second end of the driving unit is grounded, and the second end of the second voltage control unit is grounded. The laser driving circuit can improve the transmitting power of the laser and improve the driving efficiency of the laser.

The invention discloses a driving control system and a driving control method of a picosecond laser seed source, and belongs to the field of picosecond laser seed sources. The Peltier control adjusting circuit adjusts the driving power of the Peltier driving circuit according to the temperature state signal and the target temperature by utilizing a PID dynamic adjusting method, and the Peltier adjusts the real-time temperature of the seed source so that the environment temperature of the seed source is maintained at the target temperature; the seed source control adjusting circuit judges whether the temperature state signal meets the working condition of the seed source or not; and the seed source output feedback circuit feeds the driving current signal back to the seed source control and regulation circuit in real time and integrates the target driving current signal and the output driving current signal to control the seed source driving circuit. According to the invention, the working environment temperature of the seed source is accurately and dynamically adjusted in real time and the working delay is set, so that parameters such as waveform uniformity of electric pulses output in a high-frequency working state can meet the use requirements of laser equipment.

A first layer, a first spacer layer, and a second layer of a semiconductor wafer can be etched to produce a plurality of columnar structures extending from the substrate layer and including a first optical cavity situated about the first gain medium, a second optical cavity situated about the second gain medium, and a first spacer region contacting the first gain medium and the second gain medium. Also, a photonic microparticle formed from a layered semiconductor wafer and of a columnar structure having a first optical cavity situated about a first gain medium, a second optical cavity situated about a second gain medium, and a first spacer region contacting the first gain medium and the second gain medium. The first optical cavity and the second optical cavity in the photonic microparticle are each capable of generating laser light with a distinct spectral peak when energetically excited.

Employing undulator devices as x-ray radiation sources requires high magnetic field strength and precision for generating high intensity, high coherence radiation. A magnetic field tunable undulator device is described. The undulator device includes a first magnet array disposed along a central axis of the undulator device, and a second magnet array disposed along the central axis, opposite the first magnetic array, across a gap distance. First and second structural keepers are respectively coupled to the first and second magnetic arrays to support positions of the first and second magnet arrays. A plurality of tuning elements are (i) disposed along the central axis, (ii) physically coupled to at least one of the first magnet array or the second magnet array, and (iii) configured to tune the magnetic field profile along the central axis between the first magnet array and the second magnet array.

A light source system, preferably including one or more electron inputs, splitters, recombiners, and / or electron outputs, and optionally including one or more accelerator modules, input transports, radiator modules, and / or output transports. The system can optionally include one or more ancillary elements (e.g., electron optics elements). A method of operation, preferably including operating in a normal mode and / or operating in a backup mode.

The present application provides a wave shaping circuit of a laser driving circuit, a laser driving circuit and a laser device, by attenuating the wave at the start of the pulse to a lower power, and then outputting the original pulse power after a delay, the laser relaxation oscillations disappears or occurs at a lower power of the light emission, with which the amplitude and probability of generation of the relaxation oscillations are reduced, thereby reducing the abnormal power at the moment of pulse operation and preventing the optical fiber from being overheated and damaged.

An optical device includes a generator, a light emitter, a modulator, an optical amplifier, a current source, a storage, and a controller. The generator generates an electric signal of a multilevel amplitude modulation method. The light emitter emits laser light. The modulator modulates the laser light using the electric signal and outputs an optical signal. The optical amplifier optically amplifies the modulated optical signal according to a drive current. The current source adjusts the drive current to be supplied to the optical amplifier. The storage previously stores an information with respect to input-output characteristics of the optical signal in the optical amplifier relative to drive current value of the drive current. The controller acquires, from the storage, the input-output characteristics corresponding to the drive current value of the drive current supplied to the optical amplifier and controls the electric signal based on the acquired input-output characteristics.

A gas laser apparatus according to an aspect of the present disclosure includes a laser chamber, a primary electrode, a preliminary ionization electrode, a power supplier, and a processor. The laser chamber is configured to encapsulate a laser gas containing a fluorine gas. The primary electrode is disposed in the laser chamber. The preliminary ionization electrode is disposed in the laser chamber. The power supplier is configured to supply power to the primary electrode and the preliminary ionization electrode. The processor is configured to control the power supplier to perform first discharge control that causes the preliminary ionization electrode and the primary electrode to perform discharge, and second discharge control that causes only the preliminary ionization electrode to perform discharge without causing the primary electrode to perform discharge.

The invention relates to the technical field of laser energy supply, and discloses a laser energy supply control method and device and a laser energy supply system.The method comprises the steps that the chord length when a laser spot scans a blade and the chord length when the laser spot passes through a blade gap are determined; recording the moment when the laser spot enters and leaves each blade; when entering the current blade, calculating a first speed according to the moments of entering and leaving each blade and the chord length when scanning the previous blade; according to the moments of entering and leaving each blade, calculating a second speed according to the chord length when passing through the blade gap; calculating acceleration according to the first speed, the second speed and the moments of entering and leaving each blade; according to the moment of entering and leaving each blade, the first speed, the second speed, the accelerated speed and the invalid scanning distance, the starting moment is calculated; and the closing moment is calculated according to the moment of entering the current blade, the first speed, the second speed, the acceleration, the invalid scanning distance and the scanning distance. Start and stop of the laser can be accurately controlled.

A subnanosecond laser system is disclosed. The subnanosecond laser system may include a pump laser source operable to generate a pump laser beam having a pump wavelength; a first pump beam splitter operable to receive the pump laser beam and to split the pump laser beam into at least a first split pump laser beam and a second split pump laser beam; a passively Q-switched seed laser operable to receive the first split pump laser beam and generate a seed laser beam; and an amplifier assembly operable to receive the second separate pump laser beam and the seed laser beam. The amplifier assembly may include one or more amplifiers arranged in series in a multi-stage configuration, in a multi-pass configuration, or a combination thereof.

The application provides a laser driving abnormality protection method and device, relates to the technical field of safety protection of laser radars, is applied to a laser driving protection system, and the system comprises a laser driving main loop and a control feedback loop; the control feedback loop is provided with a MOS tube and an operational amplifier; the operational amplifier is connected with the laser driving main loop through a sampling resistor; the MOS tube is electrically connected with the operational amplifier; the method is that loop voltage of the laser driving main loop is monitored in real time, abnormal conditions are determined according to different voltage states, and the MOS tube and the operational amplifier are controlled and regulated according to corresponding preset strategies to execute protection, the technical problems that a traditional single current type protection circuit cannot timely cope with overvoltage, driving main loop short circuit and uncontrolled load recovery current are solved, and the technical effects of improving the abnormality protection capability of the laser and reducing the risk of device damage are achieved.

The utility model discloses a pulse modulation circuit of an ultra-wideband super-continuum fiber laser, belongs to the technical field of ultra-wideband super-continuum fiber lasers, and solves the problem that the phase noise floor of a clock circuit is directly lifted due to the fact that power supply ripple coupling and LDO filter network efficiency is insufficient, for example, the output capacitance ESR is too high or a pi-type filter is missing. Comprising an input filtering module, a low dropout linear regulator module, a pi-type filter module, a clock power supply distribution module and a grounding system module. According to the utility model, high-frequency ripple filtering, voltage ripple depth suppression and residual noise absorption are carried out on power supply output through a three-stage sequential filtering framework, and finally, super-stable power supply with a phase noise base lower than-152dBc / Hz and 1kHz offset is provided for the clock circuit, so that the time sequence precision of super-continuum spectrum laser pulses is ensured.

The invention relates to a method of manufacturing an optically-pumped or electrically-pumped device (1) with feedback structure comprising the steps of: - providing a substrate (10); - providing at least one optical confinement layer (12) on top of the substrate and comprising one or more integrated optical structures (120); - forming a colloidal dispersion comprising bulk semiconductor nanocrystals and / or bulk hetero nanocrystals,, with bulk semiconductor nanocrystals being defined as semiconductor nanocrystals having linear optical properties as determined by the corresponding material composition; - providing the colloidal dispersion, thereby forming a semiconductor film (11) and forming the device (1). The invention further relates to an optically-pumped or electrically-pumped device (1) with feedback structure comprising a substrate (10), at least one optical confinement layer (12), and at least one semiconductor film (11).

To enable highly sensitive and high-speed detection of terahertz waves.SOLUTION: A terahertz wave detection apparatus 10 includes: a QCL element 2 which has a light incident surface 2a and a light emitting surface 2b; an optical member 3 which is disposed so that laser light L emitted from the light emitting surface 2b passes therethrough; and a light detector 4 which detects the laser light L that has passed through the optical member 3. The QCL element 2 includes: a substrate 21; and a semiconductor layer 22 that includes an active layer 224 in which unit laminates 50 composed of an emission layer 51 and an injection layer 52 are stacked in multiple stages. The unit laminate 50 is configured to be capable of oscillating first laser light being mid-infrared light in a wavelength λ1 and second laser light being mid-infrared light in a wavelength λ2. The QCL element 2 is configured to change the oscillation intensity of the first laser light and the second laser light in response to the incidence of a terahertz wave T on the light incident surface 2a. The optical member 3 is configured to allow either the first or second laser light to be incident on the light detector 4.SELECTED DRAWING: Figure 1

The invention relates to a laser driving control system, which comprises a power supply module for outputting double voltages, a power supply selection module, an FPGA module, an energy storage module, a laser, a first ITOF sensor, a second ITOF sensor and a laser driving circuit, wherein the power supply selection module is electrically connected with the dual-voltage power supply module, the FPGA module and the energy storage module respectively, the laser is electrically connected with the energy storage module and the laser driving circuit respectively, and the FPGA module is further electrically connected with the first ITOF sensor, the second ITOF sensor and the laser driving circuit respectively, so that the requirements of ITOF distance measurement and DTOF distance measurement are met at the same time.

The embodiment of the invention provides an undulator assembly, a laser and an optical imaging system, and relates to the technical field of laser. The optical power of the laser output by the undulator assembly can be adjusted, and when the undulator assembly is applied to the laser, the optical power of the laser output by the laser can be adjusted. The undulator assembly comprises a first undulator, a first regulation and control magnet and a second undulator. The first regulating magnet is arranged between the first undulator and the second undulator. The first regulating magnet is provided with a first magnetic center; an electron beam received by the undulator assembly sequentially passes through the first undulator, the first regulation and control magnet and the second undulator. And the first regulation and control magnet is used for shifting the movement track of the electron beam by a first angle by changing the position of the first magnetic center.

A VCSEL array comprises two or more VCSELs arranged on a common substrate, each having an epitaxial structure, in particular identical structures, with a first distributed Bragg reflector, DBR, an active zone, and a second distributed Bragg reflector, DBR, wherein the VCSEL array is configured such that the wavelength of two of the VCSELs differs by at least 0.003 nm and at most 5 nm.

The invention discloses a pulse circuit for a distributed optical fiber temperature measurement laser device and a temperature measurement device, the pulse circuit is provided with a power supply unit, a central processing unit and a pulse signal output unit, the device is provided with a machine frame, and a bottom plate is arranged in the machine frame. The bottom plate is provided with an integrated circuit board comprising a power supply unit, a central processing unit and a pulse signal output unit, a beam combiner is arranged beside the integrated circuit board, the beam combiner is connected with a coaxial refrigeration laser placed on a circuit board, a shell of the machine frame is provided with a front panel, the front panel is provided with a power supply interface, a communication COM port, an NTC interface, an SMA interface and an optical fiber outlet, and the power supply interface is connected with the central processing unit. The optical fiber outlet is communicated with the beam combiner, and the bottom plate and the shell are integrally manufactured. The circuit is applied to a distributed optical fiber temperature measurement laser device, and can solve the problems that a common distributed optical fiber temperature measurement laser device is not long enough in measurement distance, large in power consumption and not resistant to electromagnetic interference.