10 results about "Pulse shaper" patented technology

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 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.

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 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.

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.

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.

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.

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.