Method for generating sound wave plasma grating with rapidly extended boundary

The invention discloses a method for generating a sound wave plasma grating with a rapidly extended boundary, and belongs to the field of plasma optical devices. The method comprises the following steps of: firstly, generating a high-frequency gas grating structure by using two beams of long pulse laser to interfere in gas and an electrostrictive effect in the gas; then, ionizing the gas grating through the short-pulse laser to generate a plasma grating, and the boundary of the plasma grating rapidly extending along with the ionization pulse. By adopting the method provided by the invention, the plasma grating with better stability and greatly improved diffraction efficiency can be obtained, and the obtained plasma grating can realize that the boundary extends at a light velocity along with a short pulse, and can be used for dynamic regulation and control of laser compression, broadening, high-speed optical switching and the like. 本发明公开了一种边界快速延伸的声波等离子体光栅产生方法，属于等离子体光学器件领域，步骤为：首先利用两束长脉冲激光在气体中干涉，由气体中的电致伸缩效应产生高频气