5results about How to "High peak power" patented technology

The invention discloses a non-contact welding method for diamond and quartz glass. The non-contact welding method comprises the steps that a diamond composite sheet and a quartz glass sheet are subjected to ultrasonic cleaning and blow-drying; naturally stacking the quartz glass sheets on the diamond compact to form non-contact assembly; transmitting femtosecond laser, focusing the femtosecond laser on the interface of the quartz glass sheet and the diamond compact, and welding along the outer edge of the quartz glass sheet to form a welding sample; the welding sample is placed in an annealing furnace to be subjected to annealing treatment; carrying out welding strength test on the annealed welding sample to obtain shear strength; in the whole welding process, femtosecond laser welding has extremely high peak power and extremely short energy deposition time, a heat affected zone can be controlled at the micro-nano scale, and generation of thermal stress and cracks is effectively restrained; an efficient and reliable method is provided for micro-nano connection of superhard heterogeneous materials, and high-strength welding of the diamond sheet and the quartz glass sheet under the non-clamping and non-contact conditions is achieved.

The application relates to the technical field of laser processing, and particularly provides a laser pulse shaping device, a laser device and a laser pulse shaping method.The device comprises a first connecting piece, a second connecting piece and a light blocking piece; the first connecting piece is configured to connect a pre-amplification device and output first light; the first light comprises first laser pulses and continuous light; the second connecting piece is arranged at intervals from the first connecting piece; the second connecting piece is configured to connect a main amplification device and input second laser pulses to the main amplification device; the pulse width of the second laser pulses is smaller than that of the first laser pulses; the light blocking piece is arranged between the first connecting piece and the second connecting piece; the light blocking piece is provided with a light blocking part, the light blocking piece can rotate at a target frequency and a target time delay relative to the first light, the light blocking part blocks the continuous light and shapes the first laser pulses to obtain the second laser pulses. The application shapes and blocks the continuous light of the laser through the light blocking piece, effectively improves the peak power, and improves the processing quality and efficiency.

The application provides a tunable pulse train laser and a design method thereof, the laser comprising a pumping light fiber coupling focusing system, a cavity mirror, a laser crystal, a passive Q-switching crystal, an active Q-switching system and a laser output mirror arranged in sequence according to an optical path; the tunable pulse train laser is configured to: in a working state, through the equivalent length control of the passive Q-switching crystal and the modulation control of the active Q-switching system, the number of pulse trains is controlled under the same main frequency, or the same pulse train is output under different main frequencies. The application uses the active Q-switching system and the passive Q-switching crystal in cooperation, uses the active Q-switching and the passive Q-switching in combination to obtain the output of the main frequency plus the pulse train, is favorable for the multiple processing at the same point in the fine machining, and the single pulse energy is constant, thereby providing a pulse train laser scheme which is lower in cost, more ingenious and simple in structure, good in regulation flexibility, and higher in stability and reliability of the laser.

This invention discloses a peak power control method and related apparatus based on ultrashort, ultra-intense lasers. The method includes: constructing an electron spectrum separation system to obtain the spatial distribution of the electron spectrum; controlling the gas density gradient in real time; adjusting the gas electron density using different parameters according to the spatial distribution of the electron spectrum; establishing a quantitative mapping model of back pressure-electron density-microwave intensity; adjusting different target structures to obtain the control law of the target structure on the electron return path; and obtaining a microwave parameter control strategy by comprehensively considering the synergistic effect of gas type, back pressure gradient, and target structure to control the peak power. This invention, by controlling key parameters such as gas type and pressure gradient, combined with microwave time-frequency diagnostics and synchronous measurement of the electron spectrum, reveals the electron return dynamics of microwave radiation sources, filling the technological gap in high power and spectral flexibility of traditional technologies, and laying the foundation for the development of novel controllable microwave radiation sources.

The application belongs to the technical field of laser drilling, and provides a 5G ceramic medium filter femtosecond laser drilling device and method, which comprises a femtosecond laser, and a pulse energy adjusting and controlling system, a laser pulse shaping system and a laser rotary drilling system arranged on the light beam path of the femtosecond laser. The femtosecond laser is used as a drilling light beam, has the advantages of high peak power, short action time, low material processing threshold and micron-level focused light spot, etc., can avoid the melting of the 5G ceramic medium filter material, instantaneously change the material on the 5G ceramic medium filter into plasma and emit it away, realize drilling in a very short time when heat has no time to transfer between electrons and lattices in the 5G ceramic medium filter material, and avoid the generation of thermal effects.