常見(jiàn)例句雙語(yǔ)例句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(zhuǎn)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(shí)現(xiàn)對(duì)地折射率粒子的穩(wěn)定捕獲，即粒子的相對(duì)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(gè)周期的等束腰寬度脈沖光束傳輸?shù)拿}沖脩正方法。 返回 beam waist