28 results about "Pulse shaper" patented technology

An optical metrology device includes a selectable pump arm that is used to produce a transient response in the target sample and a probe arm and may be configured to perform static Magneto-Optic Kerr Effect (MOKE) measurements or ellipsometry measurements when the pump arm is not selected, and time resolved (TR) MOKE measurements or ellipsometry measurements when the pump arm is selected. The optical metrology device may be further configured to perform opto-acoustic measurements when the pump arm is selected. A pulse shaper in the pump arm may be used to pulse duration, phase, or both, of the incident pump beam to enable measurement of the dependence of the magnetic dynamics on the pump pulse characteristics. The optical metrology device may be configured to operate at a single selectable wavelength or multiple wavelengths in a continuous or discontinuous spectrum.

The application relates to the field of impact dynamics tests, and particularly discloses an electronic instrument high-g-value impact characteristic test evaluation device and method. The device comprises an adapting section, a pulse shaper, and a base. The adapting section is coaxially connected with the tail of a high-speed gas gun launch tube to form a radially constrained loading channel and is movably connected with an impact mass. The pulse shaper is arranged in the adapting section. The base is slidably connected in the adapting section and located behind the pulse shaper, and is used for bearing the load transmitted by the impact mass when the impact mass hits the pulse shaper. The base has a front cavity and a rear cavity, and the rear cavity contains a measuring body. A diaphragm pressure gauge is arranged on the front end impact surface of the base, a base accelerometer is arranged in the front cavity, and a multi-parameter sensor is arranged in the measuring body. The device can accurately obtain an excitation load, realize distributed synchronous measurement of multiple physical quantities, has reliable signal line protection and kinetic energy absorption mechanism, and improves the accuracy and reliability of performance evaluation of electronic instruments and protective components of the electronic instruments under a high-g-value impact environment.

The subject-matter of the present disclosure provides a transmitter for a master clock of an audio system. The transmitter comprises an input configured to receive a message to be sent to a receiver of an audio device of the audio system and clock frequency information of a clock signal for synchronising the audio device; a data stream generator configured to determine a data stream based on the message; a pulse shaper configured to generate an encoded clock signal in the form of a rectangular wave having an initiating edge timing based on the clock frequency and a terminating edge timing being earlier than or later than a half cycle of the encoded clock signal depending on a bit value of the data stream; and an output configured to transmit the encoded clock signal to the receiver.

The application discloses a time-domain-based analog Softmax and Top-K calculation circuit, and belongs to the technical field of integrated circuits and artificial intelligence accelerator. N The circuit comprises one parallel analog channel and a global module. The analog channel comprises a voltage-controlled oscillation unit, an edge pulse shaper, a state latch and an output control switch, and is used for converting an input analog voltage into an extremely narrow pulse stream with a corresponding frequency; the global module comprises normalization logic, Top-K logic and global control logic, and is used for counting the total number of global pulses and the winning state of the channel, and jointly issuing a channel enable bus; through the analog channel and the global module, exponential normalization and feature screening are originally completed in the analog time domain, and high-precision analog-to-digital converters and digital divider trees required by each channel are completely saved; moreover, through a pulse competition screening Top-K mechanism, the processing of redundant data and dynamic power consumption overhead are completely eliminated, and the energy efficiency ratio of an AI chip is improved.

Disclosed herein is a radiological instrument (100, 200, 300, 400, 600, 700, 800) comprising at least one pulse shaper circuit (102) configured for a direct conversion radiation detector (108). The at least one pulse shaper circuit comprises an amplifier (110). The pulse shaper further comprises: a feedback circuit (118) in parallel with the amplifier; a first switch unit (120) in series with the feedback circuit; a second switch unit (122) in parallel with the amplifier; a discrimination circuit (124) providing a discrimination signal (128) when the output exceeds a controllable signal threshold; and a control unit (124) for controlling the first switch unit and the second switch unit, wherein the control unit controls the second switch unit such that when the second switch unit is closed, a majority of the signal is integrated.

The application provides a pulse laser and a processing method, comprising: a first oscillator, a pulse shaper and an amplifier; the first oscillator is used for providing a main light beam; the pulse shaper is arranged at an output end of the first oscillator, and is used for modulating the main light beam in a time domain based on a processing depth or shape requirement, so as to generate a seed light beam with a preset pulse width and / or a preset pulse shape; and the amplifier is arranged at an output end of the pulse shaper, and is used for amplifying the seed light beam. The pulse laser and the processing method can realize accurate control of the processing depth, improve the processing speed under the condition of ensuring the processing quality, obtain a large processing depth by using low energy, and further greatly improve the energy utilization rate.

The present invention relates to the field of ultrafast imaging technology, and discloses an ultrafast imaging device based on vector space encoding, comprising: an ultrafast pulse laser, a pulse shaper, which regulates a single pulse emitted by the ultrafast pulse laser to obtain a pulse envelope corresponding in time and spectrum; a reflective dark field microscopy imaging system, disposed after the pulse shaper, causing the pulse envelope to illuminate a target in a first direction and then reflect, emitting the reflective dark field microscopy imaging system in a second direction; a vector space encoding optical system, disposed in the second direction, comprising: a 4F optical system and a multilayer film phase plate disposed in the 4F optical system, the multilayer film phase plate being used to optically encode the pulse envelope; and an imaging system, disposed at the output surface of the 4F optical system, which obtains an encoded vector space image. The present invention achieves single-exposure ultrafast imaging by using a sub-wavelength multilayer film phase plate and utilizing the vector space characteristics of light of different frequencies for encoding.

A laser system and method include a self-referencing shaper. A self-referencing pulse shaper is provided in an embodiment. Another aspect of a laser system includes at least one beam splitter splitting a reference beam from a working beam and a test beam, a delay optic delaying a reference laser beam, an active shaper, an interferometer, and a programmable controller. In another aspect, a method includes splitting an input laser pulse into a reference pulse and a shaping pulse, controlling phase and amplitude of the shaping pulse with an adjustable pulse shaper, creating an optical delay of the reference pulse, comparing a test pulse and the reference pulse after the controlling and delay, the laser system characterizing the input laser pulse and monitoring the laser system's own dispersion in a self-referenced manner, and correcting an output working laser pulse by adjusting the pulse shaper based on the comparing step.

The invention relates to an optically-based digital-to-analogue converter comprisingA first pulse shaper, and a second pulse shaper,A first combiner, with a first input for a signal from the first pulse shaper, and a second input for a further signal,A second combiner, with a first input for a signal from the second pulse shaper, and a second input for the further signal,A first quantum pulse shaper, and a second quantum pulse shaper,Whereby the first quantum pulse shaper receives the output signal of the first combiner in the course of operation, and the second quantum pulse shaper receives the output signal of the second combiner in the course of operation,A third combiner, which combines the output signals of the first quantum pulse shaper and the second quantum pulse shaper in the course of operation,An evaluation unit, which evaluates the output signal of the third combiner.

The invention provides a current-added multi-input transconductance capacitive pulse shaper circuit and device, and belongs to the technical field of circuit design, and the method comprises a plurality of first transconductance used for converting an input voltage signal into a current signal; the current adding node is connected with the output ends of the plurality of first transconductance and is configured to superpose the current signals output by the plurality of first transconductance to form a total current signal; and the conversion unit is connected with the current adding node and is configured to convert the total current signal into a pulse voltage signal to be output. According to the current-added multi-input transconductance capacitive pulse shaper circuit and the current-added multi-input transconductance capacitive pulse shaper device provided by the invention, the layout area is effectively saved, so that a plurality of channels or pixels share one pulse shaper circuit, a larger area is reserved for a comparator, and the offset voltage of the comparator is reduced.

A fully programmable laser field shaping apparatus that can configure a beam of laser pulses in both shape and time to generate laser pulses with varying spatio-temporal profiles for adaptive nonlinear optical propagation. The laser field shaping scheme in accordance with the present invention, Adaptive Spatio-Temporal Optical Pulse Shaper (A-STOPS), utilizes dispersive elements and a programmable spatial varying optical element (e.g. deformable mirror, spatial light modulator, etc.) to impose spatial variations on each frequency component of a laser pulse. Each frequency component maps directly to a temporal slice within a chirped laser pulse. The result is the ability to generate complex spatio-temporal variation on a laser pulse with wide ranging applications in linear and nonlinear optics.

Disclosed are a photonic multiband filter and a method of operating the same. The photonic multiband filter includes an optical frequency comb that forms multiple optical channels based on a single light source incident from an outside, a modulator that applies an RF signal modulated into an optical domain among a plurality of RF signals to the multiple optical channels, and a pulse shaper that determines a center frequency, a bandwidth, and a passband shape of the RF signal modulated into the optical domain including the multiple optical channels.

This invention discloses a spatiotemporally pure high even-order dispersion soliton fiber laser and its generation method, belonging to the field of communication technology. It comprises a pump source, a wavelength division multiplexer, a few-mode erbium-ytterbium co-doped fiber, a first photonic lantern, a spectral pulse shaper, a second photonic lantern, a few-mode fiber beam splitter, and a saturable absorber connected sequentially to form a ring optical path. The first photonic lantern decomposes the multimode beam into multiple single-mode beams. The spectral pulse shaper independently applies a phase mask to each single-mode beam, introducing pure high even-order dispersion and compensating for low-order dispersion. The second photonic lantern multiplexes the modulated single-mode beams back into a multimode beam. This invention achieves independent and precise dispersion control of different transverse modes by spatially decoupling the multimode optical field. For the first time, it generates stable soliton pulses dominated by pure high even-order dispersion in a spatiotemporally mode-locked fiber laser, significantly improving pulse energy carrying capacity and providing a new solution for the development of high-energy ultrafast light sources.

The invention relates to the technical field of ultrafast imaging, and discloses an ultrafast imaging device based on vector space coding, comprising: an ultrafast pulse laser, a pulse shaper for regulating and controlling a single pulse emitted by the ultrafast pulse laser to obtain a pulse envelope with time corresponding to a spectrum; the reflective dark field microscopic imaging system is arranged behind the pulse shaper, so that the pulse envelope is reflected after illuminating the target object in the first direction, and is emitted out of the reflective dark field microscopic imaging system in the second direction; the vector space coding optical system is arranged in the second direction and comprises a 4F optical system and a multi-layer film phase plate arranged in the 4F optical system, and the multi-layer film phase plate is used for carrying out optical coding on the pulse envelope; and the imaging system is arranged on the output surface of the 4F optical system to obtain a coded vector space image. According to the invention, the multi-layer film phase plate with a sub-wavelength thickness is used, and the vector space characteristics of light with different frequencies are used for coding, so that single-exposure ultrafast imaging is realized.

The invention relates to a device (1) for characterizing the spectral phase of at least one single photon of a signal (5), comprising a first light source (2) for generating at least one pump pulse (3) with a pump pulse spectrum, a supply line (4') for a second light source (4) for supplying at least one signal pulse (5) with a signal pulse spectrum, a pulse shaper (6) for shaping the pump pulse (3) in such a way that two phase-different spectral frequency bins (12) of the pump pulse (3) are transmitted with an adjustable frequency, a mixing device (7) for mixing the shaped pump pulse (3) with the signal pulse (5) and outputting at least one first part (8) of the signal pulse spectrum, with the first part (8) comprising an overlap (11) of a frequency component of the signal pulse spectrum with the adjustable frequency of the pump pulse (3), a measuring unit (9) for measuring the intensity of the first part (8) of the signal pulse spectrum and coding a second part of the signal pulse spectrum, with the second part comprising the overlap (11) of the signal pulse spectrum shifted by a predetermined offset and the pump pulse spectrum, and an evaluation unit (10) for reconstructing at least one phase and / or one coherence property of the signal pulse (5). In this way, a simple, fast and reliable characterization of the spectral phase and coherence properties of at least one single photon light pulse is made possible.

A computer-implemented method 300 is provided for generating an output signal which approximates a desired signal, the output signal being for use in a quantum control system, where the desired signal (Fig.4a) is segmented into a plurality of segments and includes a first region and a second region, the first region being symmetric with the second region. The method comprises obtaining one or more first parameter values for each segment in the first region, 302; using a first iterative algorithm and the first parameter values to generate at least one value of the output signal for each segment in the first region, 304; and using a second iterative algorithm and the second parameter values to generate at least one value of the output signal for each segment in the second region, 306. The second parameter values are generated based on the first parameter values. Additionally, a quantum control system includes a quantum computer, a pulse generator to generate a control pulse for controlling a state of one or more qubits, and a pulse shaper (Fig.6, 600) configured to shape the control pulse using an output signal. The pulse shaper includes memory and a processor configured to generate the output signal by performing the computer-implemented method. .

The invention provides a device and a method for realizing grounding switch mechanical fault detection based on photoelectric geminate transistors, and relates to the field of high-voltage switch cabinet grounding switch mechanical device detection. The device for realizing grounding switch mechanical fault detection based on photoelectric geminate transistors comprises a light absorption and reflection strip array, a photoelectric geminate transistor pointer, a pulse shaper, a pulse counter and a clamping stagnation and loosening judgment module. The light absorption and reflection strip array and a corresponding grounding knife static contact part of one phase in the high-voltage switch cabinet are installed in parallel in an insulating mode, the photoelectric geminate transistor pointer and the grounding knife moving contact part of the phase are in coaxial linkage, and the photoelectric geminate transistor pointer and the grounding knife moving contact part are matched to generate pulse signals. After the pulse shaper shapes the pulse signal, the pulse counter calculates a relative position value, and the clamping stagnation and loosening judgment module judges whether the grounding switch is clamped stagnation, loosened or normal according to the relative position value and transmits a result to the upper computer. Through photoelectric cooperative detection, the relative positions of the moving contact and the static contact of the grounding switch can be accurately obtained, mechanical faults are efficiently recognized, and operation safety of the high-voltage switch cabinet is guaranteed.

A quasi-deterministic single-photon source and method of generating single photons on demand are disclosed. The single-photon source includes photon pair generation for generating a heralding and heralded photon in a frequency-correlated photon pair, a single-photon spectrometer adapted to detect the heralding photon and to generate an output signal that is indicative of the frequency of the detected heralding photon, a pulse shaper arrangement for reshaping a broadband pulse, and an optical frequency conversion means for converting, upon irradiation with a reshaped pulse, a heralded photon into a single output photon with deterministic source frequency. The pulse shaper arrangement is configured to select, based on the spectrometer output signal, only frequency components of the broadband pulse that substantially coincide with the heralding photon frequency or with a constant detuning thereof.

The invention provides an analog-to-digital converter based on time domain signal processing, and the circuit of the converter comprises two conversion circuits containing decision devices, and also comprises a time schedule controller and a data serial-to-parallel conversion circuit. Each conversion circuit comprises a sampling circuit, a converter, a selector and a pulse shaper which are sequentially arranged in a signal processing direction; when the circuit converts a voltage signal input by a sampling circuit into N-bit quantized output, input signals of the circuit are a system clock CKS, a digital trigger signal CKSA and analog input voltage signals VCOM, VIN2 and VIN1, the VIN1 and the VIN2 are differential voltage signals to be sampled and converted, and the VCOM is analog reference voltage; the output signal comprises a sampling completion signal RDY and a quantization output code DOUTlt; n-1: 0gt; ; the invention has the advantages of wide power supply voltage range, difficulty in process influence and the like.

The utility model discloses a layout structure of an all-digital transmitter suitable for a UWB chip, comprising a first digital baseband and a second digital baseband which are used for outputting first and second digital baseband clock signals, and the first and second digital baseband clock signals are respectively the input of a first bandwidth controller and the input of a second bandwidth controller. The output ends of the first bandwidth controller and the second bandwidth controller are respectively connected with the input ends of the first digital deserialization pulse shaper and the second digital deserialization pulse shaper, and the output ends of the first digital deserialization pulse shaper and the second digital deserialization pulse shaper are respectively connected with the input end of the digital pulse synthesizer. The output end of the digital pulse synthesizer is connected with the input end of the first switched capacitor power amplifier and the input end of the second switched capacitor power amplifier, and the output end of the first switched capacitor power amplifier and the output end of the second switched capacitor power amplifier are connected with the on-chip passive balun. According to the layout structure of the all-digital transmitter suitable for the UWB chip provided by the utility model, the layout of the all-digital transmitter is compact, and the size miniaturization is realized.

Aspects of the present disclosure generally relate to two-dimensional electronic apparatuses and methods of use. A two-dimensional electronic sum frequency generation (2D-ESFG) apparatus includes an amplifier including a laser source. A broadband optical parametric amplifier (BOPA) is optically coupled to the amplifier. The BOPA includes a two-stage amplifier. An etalon is optically coupled to the amplifier. The etalon includes two or more partially reflective substrate optical flats. A noncollinear optical parametric amplifier (NOPA) is optically coupled to the amplifier. A dispersive filter pulse shaper is optically coupled to the NOPA. A synchronizer including a galvanometer mirror is optically coupled to the BOPA, the etalon, and the dispersive filter pulse shaper. A detector is optically coupled to the synchronizer.

Aspects of the present disclosure generally relate to two-dimensional electronic apparatuses and methods of use. A two-dimensional electronic sum frequency generation (2D-ESFG) apparatus includes an amplifier including a laser source. A broadband optical parametric amplifier (BOPA) is optically coupled to the amplifier. The BOPA includes a two-stage amplifier. An etalon is optically coupled to the amplifier. The etalon includes two or more partially reflective substrate optical flats. A noncollinear optical parametric amplifier (NOPA) is optically coupled to the amplifier. A dispersive filter pulse shaper is optically coupled to the NOPA. A synchronizer including a galvanometer mirror is optically coupled to the BOPA, the etalon, and the dispersive filter pulse shaper. A detector is optically coupled to the synchronizer.

The subject matter of the present disclosure provides a transmitter for a master clock of an audio system. The transmitter includes an input configured to receive a message to be sent to a receiver of an audio device of the audio system and clock frequency information of a clock signal for synchronizing the audio device, a data stream generator configured to determine a data stream based on the message, a pulse shaper configured to generate an encoded clock signal in the form of a rectangular wave having a start edge timing based on the clock frequency and an end edge timing earlier or later than a half cycle of the encoded clock signal according to bit values of the data stream, and an output configured to transmit the encoded clock signal to the receiver.

The utility model discloses an ultrafast fiber laser device capable of simultaneously outputting traditional solitons and dissipative solitons, and relates to the technical field of ultrafast laser. According to the utility model, through the innovative design of the laser, the dispersion regulation and control element pulse shaper is introduced into the cavity of the laser, and different dispersion curves are added at different wavelengths to accurately control the dispersion at different wavelengths, so that the simultaneous output of traditional solitons and dissipative solitons is realized; therefore, the stability, the efficiency and the multifunctionality of the laser system are obviously improved; the limitation of an existing ultrafast optical fiber laser on soliton output types is broken through, and the optical fiber laser capable of outputting multiple soliton types at the same time, especially traditional solitons and dissipative solitons at the same time, is achieved.

The invention relates to an optically-based digital-to-analogue converter comprisingA first pulse shaper, and a second pulse shaper,A first combiner, with a first input for a signal from the first pulse shaper, and a second input for a further signal,A second combiner, with a first input for a signal from the second pulse shaper, and a second input for the further signal,A first quantum pulse shaper, and a second quantum pulse shaper,Whereby the first quantum pulse shaper receives the output signal of the first combiner in the course of operation, and the second quantum pulse shaper receives the output signal of the second combiner in the course of operation,A third combiner, which combines the output signals of the first quantum pulse shaper and the second quantum pulse shaper in the course of operation,An evaluation unit, which evaluates the output signal of the third combiner.

This invention proposes a system and method for generating ultra-intense broadband terahertz waves using a structured, diffraction-free, chirped femtosecond laser. In the system, a first femtosecond laser emitted by a femtosecond laser is split by a beam splitter to obtain a pump beam and a probe beam. An optical parametric amplifier modulates the pump beam into a second femtosecond laser, which, after passing through a laser pulse shaper, outputs a chirped-modulated third femtosecond laser. A reflective spatial light modulator converts and reflects the incident third femtosecond laser, and the reflected fourth femtosecond laser is reflected by a second mirror to a first off-axis parabolic mirror. After focusing, it is incident on a BBO crystal, converting part of the light into a second harmonic wave. The remaining light from the fourth femtosecond laser, along with the second harmonic wave, is focused into air, generating air plasma. The air plasma radiates terahertz waves. These terahertz waves are incident on a second off-axis parabolic mirror and reflected as collimated terahertz waves. This invention generates ultra-intense broadband terahertz waves with flexible spectral polarization control.

A broadband radiation device, comprising: a pulse shaper configured to impose a temporal profile onto an input pump pulse so as to generate a temporally-modulated pump pulse, the temporally-modulated pump pulse having a different temporal profile than the input pump pulse; and a hollow-core photonic crystal fiber (HC-PCF) having a hollow core for confining in use a working medium under a pressure, the HC-PCF being operable to receive the temporally-modulated pump pulse; wherein the temporally-modulated pump pulse is configured to be spectrally broadened by a soliton self-compression process to form broadband output radiation while propagating through the hollow core of the HC-PCF; and said temporal profile is configured so as to configure a spectrum of the broadband output radiation to have target spectrum characteristics.

An application specific integrated circuit includes a differential amplifier and a first pulse shaper that generate a full integration of an amplified radiation detection signal. A second pulse shaper generate a partial integration of the amplified radiation signal. A third pulse shaper generates a timing signal simultaneously with the partial integration and the full integration. Peak detectors measure and store maximum values of the full integration and the partial integration. A time to amplitude converter measures an incidence of a radiological event that generated the radiation detection signal in the form of a voltage ramp. A controller enables the transfer of the maximum value of the full and partial integrations and the voltage in response to discriminated values.