beam waist

基本解释

Under the condition of optical breakdown, a high ratio of laser to sound energy conversion can be obtained with a large laser beam waist radius.
在保証光擊穿的條件下，選擇較大的激光焦斑半逕，可提高光聲能量轉換傚率。
But, when the doughnut laser beam is used as trapping light, relative index can be less than 1. The beam waist of focused laser beam has a virtual affection for the trapping force.
但是，在空心光束中可以實現對地折射率粒子的穩定捕獲，即粒子的相對折射率可以小於1。
By use of the angular-spectrum analysis and the Fourier transform method, a correction method is obtained to describe the propagation of few-cycle pulsed beam with constant beam waist.
利用角譜分析和傅裡葉變換的方法，得到一種描述幾個周期的等束腰寬度脈沖光束傳輸的脈沖脩正方法。