idling beam meaning in English
无用束
Examples
- The effect of pump beam ' s walk - off and the group - velocity - mismatch in bbo crystal is discussed , the group - velocity - mismatch can be compensated by non - collinear phase - match when the angle between signal and idler beams equals to 14 . 4
当下转换光与抽运光夹角达到13 . 4度时，非共线相位匹配基本可以消除晶体中群速失配对下转换过程的影响。