10 results about "Attosecond pulse" patented technology

The invention belongs to the field of attosecond pulses, and particularly relates to a dispersion compensation and separation method and device for soft X-ray water window wave band attosecond pulses. The dispersion compensation device comprises a vacuum cavity and a liquid film generation mechanism, the working end of the liquid film generation mechanism is arranged in the vacuum cavity and used for outputting a working medium to generate a liquid film with the uniform and adjustable thickness. The separation device comprises a vacuum cavity and a liquid film generation mechanism, the working end of the liquid film generation mechanism is arranged in the vacuum cavity and used for outputting a working medium to generate a liquid film which is non-uniform and adjustable in thickness. The dispersion compensation and separation device comprises a vacuum cavity and two liquid film generation mechanisms, and the working ends of the two liquid film generation mechanisms are respectively arranged in the vacuum cavity and are used for respectively outputting working media to generate liquid films with non-uniform and adjustable thicknesses. Dispersion compensation or separation of attosecond pulses can be independently achieved through the liquid film, and dispersion compensation and separation can also be achieved at the same time.

The invention discloses a single-shot measuring device of attosecond pulse, which solves the problem that the prior art cannot realize single-shot measurement of attosecond pulse, and specifically comprises a strong magnet, a solenoid, a photoelectron detector, a first drift tube, a deflection electrode, a camera, a PD probe and M focusing electrodes, and M is greater than or equal to 1; the small end of the strong magnet is opposite to the orifice of the solenoid; a photoelectron inlet is formed in the solenoid pipe orifice; the M focusing electrodes, the first drift tube and the camera are sequentially arranged from the tube tail of the solenoid in the direction away from the solenoid. The focusing electrode is used for focusing the photoelectrons to be detected; an electrode is arranged at a tube opening of the first drift tube; the deflection electrode is arranged in the first drift tube and is close to the tube opening; the photoelectron detector is arranged in the first drift tube, is close to the tube tail and is used for receiving the photoelectrons to be detected to form a two-dimensional photoelectron spectrogram; the camera is used for capturing a two-dimensional photoelectron spectrogram; the PD is used for generating linear voltage applied to the deflection electrode.

The present application relates to a kind of general high-power attosecond light field synthesizer and synthesis method, solve the technical problems that existing technology exists chirp mirror occupies larger space, quantity is less, difficult to adjust, for the case that the dispersion difference of different waveband of wide spectrum is larger, cannot realize the synthesis of attosecond pulse, and poor thermal stability or difficult operation.The instrument of the present application includes light field synthesis base and heat dissipation device;Light field synthesis base is sequentially provided with incident filter and beam splitter or mirror along the optical path of incident light, which is divided into three reflected lights, and is combined into emergent light by beam splitter or mirror after passing through three channels respectively, and the optical path of emergent light is provided with emergent filter;Three channels include filter, thin fused quartz wedge pair, multi-pass reflection structure and multiple mirrors arranged on corresponding optical path, and the parameters of each element are adapted to the waveband of corresponding optical path respectively.

The scheme discloses a few-cycle pulse generation system and method based on pulse shaping, wherein: a superfast laser module is used to output a high-energy pulse laser, and the high-energy pulse laser is injected into a pulse shaping module; the pulse shaping module is used to determine a parabolic pulse waveform according to parameter configuration of a nonlinear spectral broadening module, and obtain a parabolic pulse with a steep time-domain front edge according to the parabolic pulse waveform; the nonlinear spectral broadening module is used to realize nonlinear spectral broadening, and obtain a spectral broadening pulse laser with approximate linear chirp; and a pulse compression module is used to perform dispersion compensation and pulse compression on the spectral broadening pulse laser, and obtain a target pulse laser with high energy and few cycles. The scheme can effectively solve the nonlinear chirp accumulation problem in the traditional Gaussian pulse post-compression scheme, can realize higher-quality pulse compression, thereby realizing high-energy few-cycle pulse laser transmission with a narrower pulse width, and further providing a high-performance driving light source for the generation of attosecond pulses.

The application belongs to the field of attosecond pulse, and particularly relates to a dispersion compensation and separation method and device for soft X-ray water window band attosecond pulse. The dispersion compensation device comprises a vacuum cavity and a liquid film generating mechanism; the working end of the liquid film generating mechanism is arranged in the vacuum cavity, and is used for outputting a liquid film with uniform and adjustable thickness generated by a working medium. The separation device comprises a vacuum cavity and a liquid film generating mechanism; the working end of the liquid film generating mechanism is arranged in the vacuum cavity, and is used for outputting a liquid film with non-uniform and adjustable thickness generated by a working medium. The dispersion compensation and separation device comprises a vacuum cavity and two liquid film generating mechanisms; the working ends of the two liquid film generating mechanisms are respectively arranged in the vacuum cavity, and are used for respectively outputting liquid films with non-uniform and adjustable thickness generated by a working medium. The application can realize dispersion compensation or separation of attosecond pulse by a liquid film alone, and can also realize dispersion compensation and separation simultaneously.

The invention belongs to the field of attosecond pulses, and particularly relates to a dispersion compensation and separation method and device for soft X-ray water window wave band attosecond pulses. The dispersion compensation device comprises a vacuum cavity and a liquid film generation mechanism, the working end of the liquid film generation mechanism is arranged in the vacuum cavity and used for outputting a working medium to generate a liquid film with the uniform and adjustable thickness. The separation device comprises a vacuum cavity and a liquid film generation mechanism, the working end of the liquid film generation mechanism is arranged in the vacuum cavity and used for outputting a working medium to generate a liquid film which is non-uniform and adjustable in thickness. The dispersion compensation and separation device comprises a vacuum cavity and two liquid film generation mechanisms, and the working ends of the two liquid film generation mechanisms are respectively arranged in the vacuum cavity and are used for respectively outputting working media to generate liquid films with non-uniform and adjustable thicknesses. Dispersion compensation or separation of attosecond pulses can be independently achieved through the liquid film, and dispersion compensation and separation can also be achieved at the same time.

A pulsed solid-state laser with the ability to stabilise the repetition rate (frep.) and carrier- envelope offset frequency (fceo), which can be used, among other things, in molecular spectroscopy, for the construction of optical atomic clocks, for the generation of attosecond pulses, in optical communications, for the construction of laser rangefinders, or in medical diagnostics, comprising a pumping laser (1), a set of lenses shaping the pumping beam (2) located downstream of the pumping laser (1), a laser resonator comprising an input coupler mirror (3a), an gain medium (3b) in the form of a crystal and an output coupler mirror (3c), as well as an electro-optical modulator located between the laser resonator components, characterised in that gain medium (3b) has the form of a crystal that demonstrates an electro-optical effect and which at the same time constitutes an electro-optical modulator for the purposes of stabilising the carrier-envelope offset frequency fceo or the repetition rate frep.

The invention belongs to the technical field of beauty and wrinkle resistance, and particularly relates to an attosecond pulse generating unit, a waveform collecting and monitoring assembly, an AI beam-shaped filtering module, a waveform driving and remodeling output unit and a cooling fan. The waveform acquisition and monitoring assembly comprises a collimator, the collimator is connected with a beam splitter, the beam splitter is connected with an optical power meter, the beam splitter is connected with a photoelectric detector, the photoelectric detector is connected with a broadband amplifier, the broadband amplifier is connected with an ultra-high-speed oscilloscope, and the broadband amplifier is connected with a data acquisition card; according to the invention, the energy of the waveform filtered and optimized by the AI module can be highly concentrated and focused at a single and accurate subcutaneous depth, so that energy waste and dispersion in a non-target area are avoided.

The application discloses a method and device for generating an ultra-short single attosecond pulse, and the method comprises the following steps: generating a few-cycle femtosecond pulse based on a femtosecond laser output module; processing the few-cycle femtosecond pulse based on a generalized double optical gating, and outputting a laser field pulse; focusing the laser field pulse to a reaction cell to ionize the reaction cell gas, and generating an ultra-short single attosecond pulse; the laser field pulse has a front part, a middle part and a tail part, the front part and the tail part are circularly polarized, the middle part is linearly polarized, a gating is formed, the ultra-short single attosecond pulse is generated in the gating, and the width of the gating is less than 1 / 5 of an optical period. The technical scheme provided by the application realizes that near-infrared pulses which are not dependent on carrier envelope phase (CEP) stability generate an ultra-short single attosecond pulse of nearly 50 as.

The invention belongs to the technical field of attosecond pumping and attosecond detection, and relates to a device and a method for realizing attosecond pumping and attosecond detection pulse time delay. The multi-dimensional displacement tables are used for bearing and adjusting the spatial positions of the gold-plated plane mirrors on the multi-dimensional displacement tables, the positions of the two gold-plated plane mirrors are finely adjusted through the two multi-dimensional displacement tables, the optical path length of the detection light path relative to the pump light path is changed, and therefore time delay between the pump pulse and the detection pulse is achieved. On the basis of grazing incidence, loss of attosecond pulses in the reflection process is remarkably reduced, the single-layer gold-plated film is easier to prepare, lower in cost and higher in damage threshold value, in addition, the reflection bandwidth of gold is generally wider than that of a narrow-band multi-layer film of a specific design, and the attosecond pulses with wider frequency spectrums are adapted. The ellipsoidal mirror is used for converging the pump light and the probe light reflected by the two gold-plated plane mirrors to a sample to be detected, and it is guaranteed that the pump light and the probe light finally coincide in spatial position height on the sample.