beam mode meaning in English

光束模式

Ld - pumped nd : yag , lbo ( type - i critical phase matching ) intracavity frequency doubled , blue laser at 473nm was obtained finally . under the condition of 14w pump power , high power tem00 mode blue laser at 473nm of 1 . 1w was obtained . by means of inserting diaphragm into cavity , the power fluctuation and beam mode were improved ; in the experiments , the proportion of special mode matching in quasi - three - level laser was discovered , and the phenomenon were explained reasonedly
实验上采用对热效应不敏感的三镜折叠腔， ld泵浦nd : yag ，类相位匹配lbo作为倍频晶体，获得了1 . 1瓦的连续473mn蓝光输出；采用腔内插入光阑的方法，有效克服了功率抖动，同时改善了光斑模式；实验中发现准三能级激光器存在两个空间模式匹配比例关系，并对这一现象给出了合理的解释。