Ultra-low repeated frequency high-voltage rectangular pulse power supply

Abstract

Constituted from revolving frisbee type mechanical spark switch driven by step motor, electric copper converts output voltage from DC high voltage power source to ultra low frequency square wave pulse in high voltage. Output characteristics of pulse power source in high voltage are: (1) amplitude of output pulse as 2-100kV adjustable; (2) repetition rate range of output pulse 0.5-l00Hz; (3) width range of output pulse 0.5ms-1.9s; (4) current of output pulse larger than 300 microampere; (5) flat top drop of output pulse lower than 2%. The disclosed power source meets needs of polarizing nonlinear crystal material in each thickness, measuring optimal experimental parameters for periodic polarizing reversion for nonlinear crystal material, and batch production experiment for ferroelectric domain crystal in periodic reversed structure.

Description

Technical field [0001] The invention relates to a power supply capable of outputting ultra-low repetition frequency and high-voltage rectangular wave pulses, which can meet the polarization requirements of nonlinear crystal materials with various thicknesses. Background technique [0002] The development of modern optical technology has put forward newer and higher requirements for lasers. One of the most common and effective methods to broaden the laser output wavelength range is to use the frequency conversion technology of nonlinear crystals. Since nonlinear crystal materials must meet the requirement of phase matching when performing frequency conversion, people usually use the double refraction phase matching PMPhase Matching technology of anisotropic crystal birefringence characteristics and artificially prepare on nonlinear crystals. The QPM Quasi-phase-matching technology of the periodic structure is used to realize high-efficiency frequency conversion. Due to the ...

AI Technical Summary

Problems solved by technology

The method of high-frequency pulse plus low-frequency pulse modulation, the minimum output pulse frequency of the power supply is 75Hz, and the maximum output pulse amplitude is 12kV. It is difficult to meet the polarization requirements of various specifications of chips in terms of frequency adjustable range and output amplitude adjustable range; The transformer step-up method, because the electric field polarization method requires the power output pulse frequency to be low, the transformer is huge and difficult to manufacture, and the pulse waveform is difficult to meet the requirements; Due to the level limitation, the maximum reverse withstand voltage of the current commercial switching tube is only 3kV, so the amplitude of the output voltage is limited. Although the reverse withstand voltage value of the hydrogen thyristor is high, due to the high cost and the dependence on imports, it has not been widely promoted. the meaning of

Since the electric field polarization method requires low power output pulse frequency, wide pulse width, high pulse amplitude, small flat-top drop, and many parameters need to be adjusted during use, it is not only difficult to achieve polarization of various specifications of wafers by conventional methods. Technical requirements, and because the production level of the device is limited and difficult to manufacture, this kind of power supply is still blank at home and abroad.

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