200results 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.

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.

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.

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.

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 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).

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.

The invention discloses an integrated free electron laser on-line collimation and visible indication laser system and method, and the system employs a theoretical center line representing a magnetic axis of an undulator as a reference, and a collimation system completes the coincidence collimation of an electron beam axis and an optical axis with the theoretical center line; the visible light indication system provides a reference visible light beam for downstream beam line commissioning, where the reference visible light beam coincides with the theoretical centerline, and the system can be independently commissioned out of vacuum. The collimation system and the visible light indication system are mutually independent, are coupled through the upstream reflector and the downstream reflector, do not influence each other, and can be permanently used on line.

Disclosed are an element comprising a substrate and at least two different optoelectronic devices, wherein the at least two different optoelectronic devices are monolithically fabricated on the substrate; and a method for producing the same. Also disclosed is an organic semiconductor laser diode comprising a substrate, an insulating grating, a first electrode, an organic layer and a second electrode in this order.

The present invention relates to the field of optical communication technology, and in particular to a method and device for controlling the transient performance of a cascaded erbium-doped fiber amplifier. The method mainly includes: synchronizing the optical power detection branches at both ends of the pump and the adjustable optical power attenuator involved in feedback control, calibrating the feedforward values of different pump currents under different gain and input optical power conditions; debugging the PID reference parameters and roughly adjusting the PID overshoot parameters; in the cascade state, debugging the starting point and end point of the overshoot window, wherein the range of the overshoot window covers the oscillation duration and overshoot / undershoot peak position in the cascade transient effect; fine-tuning the delay parameters and PID correction parameters in the up-wave and down-wave states respectively; traversing the required gain range, wavelength range, and power range, and measuring and judging whether the transient indicators meet the expected requirements. The present invention solves the problem of optical surge impact caused by transients of multi-stage cascaded EDFAs in optical networks and improves the stability of optical transmission networks.

A Time-of-Flight system having a light source which emits first light rays at a first wavelength and second light rays at a second wavelength to an object, the second wavelength being larger than the first wavelength, and a time-of-flight sensor which detects the first light rays at the first wavelength and the second light rays at the second wavelength, and generates first time-of-flight data associated with the detected first light rays and second time-of-flight data associated with the detected second light rays.

An undulator system, preferably including one or more undulators and one or more transverse quadrupole arrays, and optionally including one or more ancillary elements. The undulator system is preferably integrated into a radiator system and / or a light source system. The radiator system can include one or more undulator systems, beam separators, and / or optical elements. The light source system can include one or more accelerator modules and / or radiator systems.

To realize a light-emitting device with reduced wiring resistance. [Solution] A light emitting device comprising: a plurality of semiconductor laser elements, each having a top surface and a light emitting surface, including a first semiconductor laser element and a second semiconductor laser element; a plurality of protection elements, including a first protection element that protects the first semiconductor laser element and a second protection element that protects the second semiconductor laser element; and a plurality of wirings, including a first wiring bonded to the first protection element and a second wiring bonded to the second protection element, electrically connecting the plurality of semiconductor laser elements and the plurality of protection elements, wherein the first wiring is not bonded to the first semiconductor laser element, and the second wiring is bonded to the top surface of the second semiconductor laser element.

A method of producing an array of stimulated emission light emitting devices comprises: forming a plurality of layers of material; forming a dielectric mask layer over the plurality of layers, the dielectric mask layer having an array of holes through it each exposing an area of one of the layers of semiconductor material, and growing a light emitting structure in each of the holes arranged to emit light of at least one wavelength by stimulated emission. At least one of the plurality layers forms an upward reflector arranged to reflect light of said at least one wavelength.

The invention relates to the technical field of laser elements, and discloses a laser element with an excitation transfer emission mechanism, which comprises a substrate, a lower limiting layer, a lower wave layer, an active layer, an upper waveguide layer, an electron blocking layer and an upper limiting layer which are sequentially arranged from bottom to top, an Auger auxiliary light emission layer disposed between the active layer and the upper waveguide layer and between the active layer and the lower waveguide layer; wherein the Auger auxiliary light emission layer has a spin exchange Auger type excitation transfer emission mechanism, and the spin exchange transfer rate exceeds 1012s <-1 >. The auxiliary light emission layer with a spin exchange auger type excitation transfer emission mechanism is introduced between the active layer and the waveguide layer of the laser element, so that stokes frequency shift loss can be effectively inhibited, the coupling efficiency from a pumping energy level to a laser energy level is improved, stimulated radiation of the laser element is enhanced, an excitation threshold value is reduced, and the laser element has a good application prospect. Energy loss and waste heat are reduced, temperature distribution uniformity is improved, and the problem of uneven distribution of thermal expansion and thermal stress is relieved.

A drive control system and drive control method for a picosecond laser seed source, belonging to the field of picosecond laser seed sources, includes a temperature sensor that detects a Peltier temperature state signal in real time; a Peltier control and adjustment circuit that adjusts the drive power of the Peltier drive circuit according to the temperature state signal and a target temperature using a PID dynamic adjustment method. The Peltier adjusts the real-time temperature of the seed source to maintain the ambient temperature thereof at the target temperature; the seed source control and adjustment circuit determines whether the temperature state signal meets the seed source operating conditions; and a seed source output feedback circuit that feeds back a drive current signal to the seed source control and adjustment circuit in real time and integrates the target drive current signal and the output drive current signal to control the seed source drive circuit. The present invention achieves that parameters such as the uniformity of the output electric pulse waveform under high-frequency operating conditions are adapted to the use requirements of the laser equipment through precise and real-time dynamic adjustment of the seed source operating environment temperature and setting of the operating delay.

A wavelength variable light source includes: a first substrate on which a gain chip and an optical amplifier are formed, the gain chip including a first optical waveguide and the optical amplifier including a second optical waveguide; and a second substrate on which a wavelength variable block, a third optical waveguide, and a fourth optical waveguide are formed, the wavelength variable block including a wavelength variable element, the third optical waveguide being connected to an input end of the wavelength variable block, and the fourth optical waveguide being connected to an output end of the wavelength variable block, in which the first optical waveguide and the third optical waveguide are optically coupled to each other and the second optical waveguide and the fourth optical waveguide are optically coupled to each other by mounting the first substrate on the second substrate.

This invention provides a laser system and its control method and device. The laser system includes a laser, a laser modulator for modulating the initial laser output from the laser, a cooling device for cooling the laser modulator using a cooling fluid, and a temperature sensor for detecting the temperature of the cooling fluid. In the control method, by acquiring the temperature difference of the cooling fluid at the current moment, determining the change in temperature difference of the cooling fluid at the current moment, and adjusting the excitation energy input to the laser based on the change in temperature difference of the cooling fluid at the current moment, the power of the laser output after modulation by the laser modulator can reach the target power. The solution of this invention ensures the timeliness and accuracy of the adjustment of the excitation energy.

The invention provides a method for enhancing second harmonic emission based on a nonlinear energy transfer mechanism, which comprises the following steps of: obtaining a heterojunction formed by a donor two-dimensional material A and an acceptor two-dimensional material B, and then exciting and inducing nonlinear energy transfer through a two-photon pump light source, thereby enhancing the second harmonic emission of the acceptor two-dimensional material B; in the heterojunction, the donor two-dimensional material A is (LA) 2 (A) n-1PbnI3n + 1; wherein LA is an alkyl ammonium ion or a phenylammonium ion of C3-C6; a is an alkyl ammonium ion of C1 to C2 or a formamide ion of C1 to C2; n is 1 to 4; and the receptor two-dimensional material B comprises at least one of MoS2, MoSe2, WSe2 and h-BN. According to the scheme, the SHG of the acceptor material can be effectively enhanced.

The invention relates to a laser pulse generator (10) comprising: a) a pulse shape generating device (12) having - a pulse shape memory (16) for storing data and a digital-to-analogue converter (16) connected thereto, - a first connection (20) for supplying a clock signal (100), and - a second connection (22) for outputting an output signal (106), the digital-to-analogue converter (16) generating an output signal (106) in synchronisation with a clock signal (100) received at the first connection (20), which output signal is output at the second connection (22); b) a synchronisation circuit (30) which has a third connection (32) for connecting a trigger signal line (34) transmitting a trigger signal (104) and is connected to the second connection (22); and c) a clock stopping element (38) which is connected to the first connection (20), the synchronisation circuit (30) being designed to control the clock stopping element (38) depending on the trigger signal (104) and depending on the output signal (106) output at the second connection (22).

The invention discloses a radio-frequency pulse power supply for a radio-frequency carbon dioxide laser, and the power supply comprises an input unit which inputs a radio-frequency signal; the first-stage power amplification unit is used for receiving the radio frequency signal, amplifying power and outputting a first-stage amplified radio frequency signal; the first-stage power distribution unit receives the first-stage amplification radio frequency signal and equally divides the first-stage amplification radio frequency signal into two paths of first-stage distribution radio frequency signals with the same power for output; the second-stage power distribution units are arranged in pairs, receive the first-stage distribution radio-frequency signals, uniformly divide the first-stage distribution radio-frequency signals into two paths of second-stage distribution radio-frequency signals with the same power through voltage reduction and transformation, and output the two paths of second The second-stage power amplification unit receives one path of second-stage distribution radio frequency signal, amplifies power and outputs a second-stage amplification radio frequency signal; the power synthesis unit is used for receiving the four paths of secondary amplification radio-frequency signals and synthesizing the four paths of secondary amplification radio-frequency signals into high-power radio-frequency signals for output through boost transformation; and the output unit receives and outputs the high-power radio frequency signal. Through multi-stage amplification and multi-stage synthesis, pulse signal output with hundreds of watts to kilowatt peak power is realized.

The invention relates to the technical field of light sources, and particularly discloses an ultrahigh-brightness light source jointly driven by laser and a power supply. The light source comprises a gas chamber, a laser emitting device, a focusing lens system and an external power supply control unit. The laser emitting device generates laser with a specific wavelength, and the laser is accurately focused on a plasma emitting point of the gas chamber through the focusing lens system for preheating, so that the triggering difficulty is reduced, and the excitation efficiency is improved. The external power supply control unit provides a pulse electric signal to trigger the gas chamber to work, and under the action of laser preheating, the gas chamber releases stronger optical radiation to realize ultrahigh brightness. Through the synergistic effect of the laser and the power supply, the brightness and the working stability of the light source are remarkably improved, meanwhile, the trigger voltage is reduced, and the service life of the gas chamber is prolonged. The technology has the advantages of simple structure, convenience in operation, easiness in maintenance and the like, and can be widely applied to the fields of illumination, projection, medical treatment, scientific research, industrial detection and the like.

A method for maintaining the thermal stability of a laser device, a laser device power source system, and a laser device. The method comprises: acquiring the current light-emission frequency of a light-emission pulse signal of a laser device (S202); and in response to the current light-emission frequency being less than a preset frequency threshold value, generating a preheating pulse train signal before the light-emission pulse signal is generated, wherein the total power generated by the laser device under the drive of the preheating pulse train signal and the light-emission pulse signal is kept within a preset thermal stability power interval (S204). By using the method, the thermal lensing effect of a laser device crystal can be overcome, thereby improving the thermal stability of a laser device.

A laser emitter is provided, including a substrate and a dielectric mask layer located proximate to and above the substrate in a thickness direction. The dielectric mask layer may have a plurality of trenches formed therein. The plurality of trenches may have a plurality of different respective widths. The laser emitter may further include a respective nanowire located within each trench of the plurality of trenches. Each nanowire may include a first semiconductor layer located above the substrate in the thickness direction. Each nanowire may further include a quantum well layer located proximate to and above the first semiconductor layer in the thickness direction. Each nanowire may further include a second semiconductor layer located proximate to and above the quantum well layer in the thickness direction.

The invention relates to the technical field of solid lasers, in particular to a large-energy green laser. The laser comprises a first pumping source, a first pumping coupling device, a second pumping source, a second pumping coupling device, a resonance assembly, a first frequency doubling crystal, a second frequency doubling crystal, a Q-switching device, a first crystal and a second crystal. The resonant assembly is used for forming a laser resonant cavity and further comprises a compensation device. According to the large-energy green laser provided by the invention, the thermal lens effect of the laser crystal can be weakened through the double-pumping double-crystal, so that the fundamental frequency light can be better amplified. And the arranged compensation device can also improve the overall thermal management of the laser by compensating the thermal lens effect, and is beneficial to outputting stable and high-energy laser.