149 results about "Nanosecond" patented technology

The invention discloses a single-photon non-vision-field target tracking system based on an unmanned aerial vehicle platform, which belongs to the field of non-vision-field imaging and is characterized in that a laser is connected with a scanning galvanometer assembly through a first nanosecond optical path switch and an optical fiber circulator to form an emission optical path for emitting laser pulses to relay reflecting surfaces corresponding to four predetermined positioning points; the scanning galvanometer assembly is connected with the photon detector through the collimating optical fiber, the optical fiber circulator and the second nanosecond optical path switch to form a receiving optical path capable of receiving echo photons; the main control module is electrically connected with the laser, the first nanosecond light path switch, the second nanosecond light path switch, the scanning galvanometer assembly, the photon detector, the time-to-digital converter and the high-frequency inertial measurement unit respectively, and can control each component to perform laser ranging, double-window gating, single-photon detection, inertial measurement unit sampling and timing according to a unified time sequence; and the three-dimensional coordinates of the current non-vision target are calculated by using the distance measurement data through an ellipsoid intersection solution method, so that non-vision target tracking is realized.

The invention discloses a gas leakage detection imaging device and method based on a single photon detection technology, and belongs to the technical field of gas detection and imaging. Aiming at the limitation problems of the existing gas leakage detection technology in the aspects of sensitivity, response speed, space imaging capability and anti-interference capability, nanosecond modulation control and synchronous photon counting are realized by utilizing an FPGA (Field Programmable Gate Array) through a visual gas detection imaging device combining an SPAD (Single Program Amplifier) array detector and a WMS modulation-demodulation mechanism; and the second harmonic of the absorption signal is further extracted by combining digital phase-locked amplification, so that gas leakage three-dimensional imaging with high spatial resolution, ppb-level sensitivity, strong background suppression capability and high time response is realized. The system has the advantages of high detection sensitivity, real-time imaging capability with high spatial resolution, high background light interference resistance and high signal-to-noise ratio, the demodulation method is novel, and the modular design has multi-gas compatibility and system expansibility.

The invention provides a wafer-level cluster coplanar waveguide electrode array, a preparation method and a test system. The coplanar waveguide electrode array comprises an insulating substrate and a plurality of coplanar waveguide electrodes which are arranged in a periodic array; each coplanar waveguide electrode comprises a central transmission section, a probe pad and a gradual transition section; through the design of the central transmission section and the gradual transition section of the coplanar waveguide configuration, the whole-course impedance matching from an external probe to a nano gap is ensured, so that nanosecond and even picosecond-level ultrafast electric pulses can be transmitted to the cluster function unit with extremely low loss and distortion; through overlay and multi-step photoetching and in combination with a negative feedback electromigration technology, a nano gap is manufactured with high success rate, and a cluster function unit is integrated; besides, a test system integrating a coplanar waveguide electrode array and a high-end test instrument is used for exciting and capturing the ultrafast response of a cluster functional unit, and the single write-in time of a cluster device is directly pushed to a subnanosecond level (lt;

The invention discloses a high-safety nanosecond-order delay transistor testing system and method, belongs to the field of transistor testing, and can test the characteristics of a transistor to be tested at any drain voltage stress value, drain voltage stress duration and load current based on nanosecond-order measurement delay on the basis of ensuring the safety of the testing system and experimenters. The circuit comprises switches S1, S2 and S3, resistors RA and RC, Schottky diodes D1 and D2, a power inductor L and a power supply VDD. The conduction time of the switch S1 can be controlled to control the duration of the post-stage circuit for bearing the high voltage VDD; the current value of the power inductor L at the end of charging can be controlled by controlling the conduction time of the switch S2; by testing the voltage and the current of the switch S3, the switch transient characteristic, the on-resistance characteristic and the like of the switch S3 can be obtained. Simulation and experiments prove that the measurement delay of switching to the test state after the voltage stress of the drain electrode is ended is nanosecond magnitude, and the situation of'large current connection caused by mistaken switching-on of a series switch 'does not exist, so that the circuit safety is higher.

The invention relates to a nanosecond fiber laser and method for high-order chaotic pulses. A fiber ring cavity of the laser comprises a wavelength division multiplexer, an erbium-doped fiber, a first polarization controller, an analyzer, a second polarization controller, an output coupler, a dispersion control unit, a fiber isolator and a band-pass filter which are connected in sequence. The method comprises the steps that pumping continuous light is coupled into the laser through the wavelength division multiplexer; pumping continuous light is absorbed by using an erbium-doped optical fiber and is stimulated to radiate a long-wave-band gain pulse; under the combined action of the first polarization controller, the polarization analyzer and the second polarization controller, an equivalent saturable absorption effect is generated by utilizing nonlinear polarization rotation generated when gain pulses are propagated in an optical fiber, and large anomalous dispersion is introduced to realize generation of nanosecond pulses; through the band-pass filter, nanosecond pulses are allowed to be generated, and meanwhile, the nonlinear increasing speed of propagation and accumulation of the nanosecond pulses in the cavity is controlled, so that order-by-order generation of high-order chaotic pulses is realized. According to the invention, reliable output of high-order chaotic pulses can be realized.

The invention discloses a high-temperature high-density plasma generation and radiation opacity measurement method, which comprises the following steps: clamping a target material by using low-density low-Z-element foam to form a sandwich structure sample, and synchronously and directly driving the sandwich sample from two sides by using multiple beams of smooth nanosecond laser, the preparation temperature reaches 1,000,000 DEG C, and the electron density reaches 1 * 1023 pieces per cubic centimeter; then generating an X-ray source through the action of one or more nanosecond laser beams and the high-Z material, measuring the absorption spectrum of the X-ray source penetrating through the target plasma, the backlight spectrum of the X-ray source not penetrating through the target plasma and the self-emission spectrum of the target plasma through a spectrograph, and finally realizing the measurement of the radiation opacity of the high-temperature and high-density plasma. The high-temperature and high-density plasma radiation opaqueness measurement device has the beneficial effects that the high-temperature and high-density plasma radiation opaqueness measurement of which the temperature reaches 1,000,000 DEG C and the electron density reaches 1 * 1023 per cubic centimeter is realized on a million-joule nanosecond laser device.

The present disclosure provides a time compensation method and system for interference test equipment. The method includes: obtaining a first delay time and a second delay time; decomposing the first delay time and the second delay time to obtain a nanosecond scale delay time corresponding to the first delay time and a picosecond scale delay time corresponding to the second delay time; performing lead compensation for the nanosecond scale delay time by a configurable lead compensation and output module to obtain a nanosecond scale lead compensation time; performing lag compensation for the picosecond scale delay time by a delay compensation module to obtain a picosecond scale delay compensation time, and calculating a sum of the nanosecond scale lead compensation time and the picosecond scale delay compensation time to obtain a picosecond scale lead compensation time; and applying an interference signal on a controller area network, CAN, bus based on the picosecond scale lead compensation time. Therefore, by using a plurality of timing controllers connected in cascade in the delay compensation module, the picosecond scale delay compensation time is realized.

We present a ground-based laser system for searching, ranging, and tracking that actively illuminates small resident space objects (RSOs) in low Earth orbit (LEO) and observes position and transit-time of reflections, enabling orbital custody of most one-to-few centimeter-sized objects. A diode-pumped alkali laser (DPAL) augmented with mode-locking and Q-switching serves as an illuminator and offers exceptionally high spectral brightness due to its output beam's sub-nanosecond pulse duration and picometer-level spectral linewidth. Kilohertz fast-rastering enables interrogations of distinct few-meter-sized sky-patches at megahertz rates. Paired on the observation side with one or more telescopes outfitted with Faraday anomalous dispersion optical filters (FADOFs), image intensifiers, multi-pixel arrays, and nanosecond timing, the combined system could offer nearly background-free discoveries of RSOs every hour, even during daytime. Periodically re-flashing previously discovered objects to maintain orbit custody expends only a small fraction of total observing time.

The application discloses a kind of bionic visual sensor devices with pulse coding capability.Light quantum reaches device, and photoelectron-hole pair will be generated.Light-generated carriers continue to collide with lattice atoms by the strong electric field force between cathode and anode, and new photoelectron-hole pair is generated.The process will be repeated in turn, and then macroscopic current is generated.Through external resistance voltage division, the electric field between cathode and anode is reduced, so that macroscopic current is quenched, thereby realizing the pulse current lasting several nanoseconds.After tens of nanoseconds, the device quickly recovers to the initial state, preparing for detecting the next light quantum.In addition, the inversion layer formed below the polysilicon gate can effectively regulate the wavelength response of the device, enabling it to have a biologically reasonable visual color perception ability.Meanwhile, the device is fully compatible with standard microelectronic technology, enabling large-scale integrated bionic visual sensors to meet the development needs of fields such as bionic robots.

This invention discloses a non-equilibrium optical pump source with a rise time on the order of nanoseconds to sub-nanoseconds and its operating method. This invention integrates a collimating mirror, a reflecting mirror, a beam splitter, a light-absorbing plate, a hemispherical mirror, an aperture, a converging lens, a high-speed motor, a turntable, and a diffuse reflection assembly to obtain a non-equilibrium optical pump source with a rise time on the order of nanoseconds to sub-nanoseconds. By reducing the spot size, increasing the rotation speed, and increasing the turntable diameter, the signal rise time can be compressed to the order of nanoseconds to sub-nanoseconds. This effectively solves the problem of inaccurate time constant measurement caused by the excessively long rise time of the output signal of traditional mechanical choppers when measuring the response time of fast infrared detectors using the frequency descent method, thus achieving high-precision measurement of the infrared detector time constant.

This invention discloses a two-dimensional infrared spectroscopy system and its detection method that combines acid-base step and pulsed heating. The system includes a femtosecond laser, an optical parametric amplifier and difference frequency generator, a frequency divider, an electronic time delay generator, a nanosecond laser, a detachable optical parametric oscillator providing 355nm light pulses, an optical parametric oscillator providing 2020nm light pulses, a monochromator and a mercury cadmium telluride array detector, an integrator and data acquisition card, a computer, a chopper, a time-resolved pulse generation chamber, and a sample chamber. This invention retains the original pulsed heating trigger mode by using a nanosecond light source with a detachable optical parametric oscillator providing 355nm light pulses. It achieves convenient switching between the acid-base step and pulsed heating modes through a dichroic mirror and a reversible reflector. Before and after switching, the propagation direction of the nanosecond pulses is completely consistent, and the relative time delay is corrected by the electronic time delay device.

The invention relates to the technical field of semiconductor device manufacturing, in particular to a preparation method of an ultra-low junction capacitance TVS (Transient Voltage Suppressor) protection device. The method comprises the steps that a high-aspect-ratio fin groove array is constructed based on a GaAs substrate, a steep side wall is formed through reactive ion deep etching and a plasma repairing technology, the traditional etching aspect ratio limit is broken through, and volume order of magnitude expansion of a depletion region is achieved; a P < + >-gradient intrinsic layer-N < + > doping structure is formed on a three-dimensional side wall by adopting multi-angle rotating ion implantation, electric field distribution is optimized through a continuous concentration slope, and the problem of advanced breakdown caused by peak electric field concentration is solved; an air bridge electrode process is innovated, suspended interconnection of air dielectric isolation is formed by release of a sacrificial layer, and stray capacitance is thoroughly eliminated; and in combination with a multi-ring field limit terminal and pulse laser local annealing, edge electric field suppression and lattice integrity control are realized. According to the method, the device has ultralow junction capacitance, nanosecond response and high robustness, and a subversive electrostatic protection solution is provided for a high-speed communication system.

The invention provides a multi-purpose laser marking and cutting device, which relates to the technical field of glass processing, and comprises a rack, a double-conveyer belt type conveying line, a marking and labeling module, a laser cutting module and a linkage control module, the double-conveying-belt type conveying line, the marking and labeling module, the laser cutting module and the linkage control module are all installed on the rack, and cooperative linkage is achieved through the linkage control module. The two independent and exclusive conveying belts are arranged to adapt to differentiated machining of small glass and large glass, equipment or an adjusting structure does not need to be replaced, and the machining adaptability and efficiency are improved; an ultraviolet laser marking head is adopted for marking to guarantee the fineness, a nanosecond infrared laser cutter and various sensors are arranged for cutting, support is provided for precise cutting of large glass, and integration of multiple procedures is achieved; in addition, cooperative linkage of all the modules is achieved through the linkage control module, manual procedure-by-procedure control is not needed, automatic operation is achieved, manual intervention is reduced, and the overall machining efficiency is further improved.

The present invention relates to a laser beam combining and forming device and method with coordinated spatiotemporal phase control, which mainly includes a laser spatiotemporal beam combining device, a laser beam splitting device, and a laser shock forming device. The laser spatiotemporal beam combining device includes two nanosecond lasers, three one-way glasses, three reflectors, a transmission device, and a high-reflective material; the laser beam splitting device includes multiple motors, multiple semi-transparent mirrors, and multiple delay devices; the laser shock forming device includes optical glass, a gasket, an x-y-z three-axis processing platform, and a water spray device. The present invention first uses polarization beam combining to combine two pulse lasers, and then multiplies the combined laser to obtain laser energy with a greater energy density; then, the laser beam splitting device can obtain ultra-high repetition rate laser pulses. The shock waves under the ultra-high repetition rate will have mutual influences, providing a new method for laser shock forming.

This invention discloses a deep-ultraviolet nanosecond-gated Raman and LIBS detection system and method for suspended soil particulate matter nutrients, belonging to the field of optical and smart agriculture sensor technology. The system includes: a laser ejection sampling unit for in-situ soil ablation to generate aerosols; an optical tweezers unit for capturing and suspending individual soil particles; a deep-ultraviolet laser excitation unit for emitting nanosecond dual-pulse lasers to excite the same particle to generate Raman and LIBS signals; a spatial heterodyne spectral interferometry imaging unit for slitless, high-throughput coaxial signal collection and the formation of interference fringes; and a timing control unit for time-division multiplexing detection of Raman and LIBS signals through nanosecond gating. This invention eliminates matrix effects and achieves highly sensitive in-situ, non-destructive, and synergistic detection of atomic and molecular information in single soil particles. Furthermore, Raman and LIBS are used to distinguish the organic content and total composition of nitrogen, phosphorus, and potassium, enabling precise quantification of soil nutrients.

The invention relates to the technical field of material performance testing, in particular to a novel ultrafast IV ferroelectric material testing method, and provides the following scheme aiming at the problems that in the prior art, a ferroelectric material IV testing method is low in speed, low in time resolution, low in precision and incapable of accurately reflecting the electrical performance of a ferroelectric material under ultrafast voltage excitation. A hardware-level synchronous test system composed of a waveform generator / fast measurement unit (WGFMU) and a dual remote induction and switch unit (RSU) is constructed, a ferroelectric sample is prepared in combination with pulsed laser deposition (PLD) in a standardized mode, then a special voltage waveform signal is edited, and accurate test of the current-voltage characteristics of the ferroelectric material under the nanosecond time scale is achieved. According to the method, the defects of an existing IV test method in the aspects of test speed, time resolution and test precision are overcome, and the electrical performance of the ferroelectric material under high-frequency and rapid change working conditions can be reflected more truly.

The invention belongs to the technical field of laser surface modification processing, and particularly relates to a femtosecond-nanosecond double-beam laser cooperative shock peening method, which comprises the following steps of: taking a nanosecond laser and a femtosecond laser as shock peening light sources at the same time, and combining the two beams of laser through a beam combiner, focusing on the surface of the workpiece through a focusing optical system for impact strengthening; when the workpiece is subjected to shock peening, the time delay between the femtosecond pulse and the nanosecond pulse is controlled through the time delay device, so that the femtosecond laser reaches the surface of the workpiece before the nanosecond laser; the femtosecond laser firstly ionizes a material on the surface of a workpiece to form plasma, and realizes strong absorption of subsequent nanosecond laser, so that the depth of an influence layer of nanosecond impact strengthening can be achieved without an absorption layer and a water restraint layer. The method has the advantages of femtosecond laser shock peening, that is, a restraint layer and an absorption layer are not needed, and the method has the advantage of nanosecond shock peening, so that the depth of a deep influence layer can be realized.

The invention relates to the technical field of lasers, in particular to a multi-wavelength output nanosecond laser. The laser comprises a pumping source, a pumping coupling device, a pumping end mirror, a gain crystal, a Q-switching device, a turning mirror, a frequency tripling crystal, a frequency doubling crystal and a tail end mirror. A pumping source, a pumping coupling device, a pumping end mirror, a gain crystal, a Q-switching device and a turning mirror are sequentially arranged in the light emitting direction of the pumping source. A turning mirror, a frequency tripling crystal, a frequency doubling crystal and a tail end mirror are sequentially arranged along the reflection direction of the turning mirror; the tail end mirror is a plane mirror, the end face, facing the frequency doubling crystal, of the tail end mirror is plated with a fundamental frequency light partial reflection film and a frequency doubling light high reflection film, and the transmittance of the fundamental frequency light partial reflection film is 2%-98%. The multi-wavelength output nanosecond laser provided by the invention can synchronously output multi-wavelength nanosecond laser with adjustable power pulse width by controlling the transmittance of the film layer of the output lens at the tail end.

A laser-plasma synergistic surface treatment method for CFRP / titanium alloy heterojunctions belongs to the field of heteromaterial bonding technology. First, nanosecond pulsed lasers are used to etch the surfaces of CFRP and titanium alloy to be bonded, constructing a micro-nano composite structure. Then, atmospheric pressure cold plasma is used to activate the etched surfaces, grafting polar functional groups. Finally, the two are bonded and cured using an adhesive. This invention achieves a dual enhancement effect of "mechanical interlocking" and "chemical bonding" by organically combining "laser etching to construct micro-nano physical structures" and "plasma activation to introduce chemical functional groups," significantly improving the interfacial bonding strength of CFRP / titanium alloy heterojunctions. Compared with single treatment methods, this invention can increase the joint shear strength by more than 38%, and the failure mode changes from interfacial failure to cohesive failure. It has advantages such as environmentally friendly process, good controllability, and significant effects, and has broad application prospects in aerospace, high-end equipment manufacturing, and other fields.

The present disclosure provides a technique for achieving high-speed modulation of a light source for exposure, making it possible to speed up printing by an electrophotographic device. An exposure head (12) of an electrophotographic device (1) has light-emitting elements arranged at a density of 600 dpi or more in a first direction (X). Each light-emitting element has a light-emitting layer containing semiconductor particles, which emit incoherent light, between layered electrodes. The fluorescence lifetime of the semiconductor particles is 10 nanoseconds or less, and the number-based particle diameter is 100 nm or less.

The application provides a thin-film solar cell two-dimensional code etching device, and provides a thin-film solar cell two-dimensional code etching device, which comprises a laser optical system, a material receiving reel, a material feeding reel, a tape sensor, a plurality of tensioning directional wheels and the like, and has the advantages of simple and compact structure and continuous operation capability. The device can edit the layout of the required mark in a self-defined mode, and can sputter the two-dimensional code information and the required mark information onto the surface of the glass by etching, so that the glass product is not damaged. The application also provides a thin-film solar cell two-dimensional code etching method, in which the near-infrared laser with a pulse width of nanoseconds is integrated and focused by using an optical system, and the high-temperature-resistant high-molecular material coated on PET or PEF is transferred to the surface of the glass by using a vibrating mirror scanning technology, so that the two-dimensional code and the related mark characters are obtained. The method has the characteristics of fast processing speed, stable process, easy maintenance, simple tape replacement and cost saving.

The utility model provides a nanosecond pulse fiber laser. The nanosecond pulse fiber laser comprises a seed source module, a first-stage amplification module, a second-stage amplification module and a third-stage amplification module. The seed source module is used for outputting seed light, the input end of the first-stage amplification module is connected with the seed source module, the input end of the second-stage amplification module is connected with the output end of the first-stage amplification module, and the input end of the third-stage amplification module is connected with the output end of the second-stage amplification module. The seed source module comprises a directly modulated semiconductor laser diode and a first online isolator, the output end of the semiconductor laser diode is connected with the input end of the first online isolator, the input end of the primary amplification module is connected with the output end of the first online isolator, and the output end of the first online isolator is used for outputting seed light. The nanosecond pulse fiber laser provided by the utility model can solve the technical problem that the tuning frequency range is limited in the prior art.

The invention relates to the technical field of metal material surface treatment, and discloses a vacuum coating process for a metal substrate and an anti-aging anti-corrosion film, which comprises the following steps: depositing a transition layer, depositing an anti-corrosion film main layer, collecting a negative pulse rising edge displacement current slope in real time, determining a charge adsorption saturation point according to a first-order derivative zero crossing point of the slope, a nanosecond controlled overshoot stage is driven to induce transverse migration of atoms, the nanosecond controlled overshoot stage is switched to a platform stage to maintain deposition, and residual charges are eliminated in a neutralization stage. Instantaneous high-momentum ion flow generated by dynamic response of a sheath layer is used for improving the density of a film layer, and lattice dislocation migration is eliminated in cooperation with an energy release mechanism of a pulse gap; the physical contradiction of cracking caused by accumulation of residual compressive stress in a high-density film is solved, the film layer structure is in a low-stress equilibrium state, the interface anchoring strength is enhanced, and penetration of a corrosive medium is blocked.

The invention discloses a low-voltage nanosecond pulse platform waveform fitting method, and belongs to the technical field of high-frequency pulse control, and the method comprises the steps: obtaining a set voltage value, calculating the optimal pulse width corresponding to a target cell through a transmembrane voltage formula according to the set voltage value, and calculating the optimal pulse width according to a dose and transmembrane potential accumulation model. Calculating the number of equivalent nanosecond pulse sub-pulses capable of replacing the optimal pulse width, calculating the number of pulse strings according to the total dose set by the optimal pulse width and the number of the equivalent nanosecond pulse sub-pulses, fitting nanosecond pulses, and replacing the optimal pulse width, the calculated nanosecond fitting value, the calculated pulse string number and preset parameters are stored in a storage chip of the pulse platform, the pulse platform calls the storage parameters for energy emission, the low-voltage nanosecond platform can be used for achieving the combined effect of a microsecond platform and a high-voltage nanosecond platform, released bubbles are smaller than those of the microsecond platform, the occurrence rate of embolism is reduced, and the service life of the microsecond platform is prolonged. The released voltage is lower than that of traditional nanoseconds, and the problems of blood fusion and smooth muscle and nerve damage are reduced.

The application discloses a kind of ferrite gyromagnetic nonlinear loss transient response theoretical model and parameter simulation method under vertical pumping configuration, belong to microwave technical field, including the following steps: obtaining ferrite material parameters and target excitation microwave signal parameters, signal parameter at least includes microwave signal frequency, pulse width tau;Pulse width dependent function for representing consistent precession magnetic moment and the coupling strength of non-consistent precession magnetic moment (spin wave) is constructed.In view of this, the application first establishes the quantitative relationship model between the excitation microwave pulse width tau and the nonlinear loss excitation threshold (tau) in the theoretical framework of vertical pumping configuration, establishes the quantitative relationship model between the excitation microwave pulse width tau and the nonlinear loss excitation threshold (tau).The model can accurately describe the nonlinear effect of ferrite under nanosecond transient pulse excitation, and the dynamic law of the excitation condition and the change of pulse width.For the design of ferrite limiter device facing high-power microwave electromagnetic environment, important theory and design basis are provided.

The invention provides a space propulsion method of a nanosecond-femtosecond composite light filament, which is used for solving the problem of low long-distance laser propulsion efficiency. The method specifically comprises the following steps: forming a kilometer-level length filament through a space filament forming principle of femtosecond laser, stabilizing the power density at 1013-1015W / cm < 2 > magnitude by utilizing a light intensity clamping effect, and realizing dozens of kilometer-level low-loss energy transmission; meanwhile, the transmission direction of the nanosecond laser is adjusted through the optical lens group, the formed nanosecond filament and the femtosecond laser are coaxially transmitted or transmitted at a certain angle and act on the same position, a plasma channel generated by the filament enables the transmission loss of the high-energy nanosecond laser to be greatly reduced, and the energy absorption of the target material to the nanosecond laser is remarkably improved; therefore, the surface of the target material is melted, gasified and even ionized in an extremely short time, a large number of high-speed reverse-spraying plasma plumes are generated, and high specific impulse and thrust are obtained. The method is suitable for various target materials, and precise control over the thrust, the specific impulse and the propelling direction can be achieved by regulating and controlling laser parameters.

The present application relates to a method (100) for use in cutting a substrate or preparing a substrate for cleaving. The method (100) comprises: irradiating (102) the substrate with a plurality of pulses of a laser beam, the pulses having a pulse duration of less than a nanosecond and an elongate cross sectional spatial profile, and wherein the fluence of the plurality of pulses is controlled to be less than a single shot damage threshold fluence of the substrate; providing (104) relative movement between the laser beam and the substrate such that the plurality of pulses are arranged along a cutting path; and controlling (106) the relative movement such that each of the pulses is spatially overlapped with at least one other of the pulses along the cutting path. An apparatus having a laser system configured to perform the method (100) is also disclosed.

A device for the generation of ultrashort pulses, wherein an oscillator is formed by: a first and a second non-overlapping transmission band-pass filter, which can serve as reflecting end element of the oscillator; optically transparent means with non-linear Kerr coefficient χ(3) different from zero configured to achieve a spectral broadening by self-phase modulation of the signal transiting through these means; an optical waveguide that produces a positive gain; a node configured to receive a trigger signal designed to activate the operation of the oscillator; a trigger signal generating device comprising: a laser source, for example a microchip, configured to generate a laser pulse, preferably with a minimum bandwidth, having a duration of hundreds of ps, up to the ns; a coupling system designed to introduce the pulse of the trigger laser into a waveguide made of an optically transparent material characterised by a non-linear Kerr coefficient χ(3) different from zero, which is configured to produce two distinct effects in order to spectrally broaden the pulse of the trigger laser, and precisely: a) self-phase modulation four-wave mixing; the output of the waveguide supplies the trigger signal to the node. The pulses produced by the oscillator typically have a duration of the order of the picosecond and are easily reduced to the Fourier limit of circa 100 femtoseconds by means of a dispersive device.

The application discloses a kind of based on the BENES network routing composite solving method and device of prediction, method includes the following steps: receiving routing solving input;According to routing solving input, generate a large number of prediction sequences and according to enumeration order, each cycle provides a new set of prediction sequences to pipeline for solving;According to routing solving input, solve using speculative algorithm;The solving result of speculative algorithm and the prediction result of prediction sequence are stored in cache;According to routing solving input, solve using pipeline;According to routing solving input, match with the cache result in cache, if match is successful, directly output routing solving result, if match is not successful, wait for pipeline output routing solving result.The application further reduces the solving time required by the best routing solving hardware at present to tens of nanoseconds or even lower, so that BENES optical network can be really used in production environment.