backward wave tube 返波管 ; 回波管
backward wave amplifier 返波放大器
backward-wave oscillation 返波自激振荡
backward wave mode 返波模式
backward-wave effect 回波效应
backward wave property 后向波效应
backward-wave converter 反波变频管
backward-wave magnetron 反波式磁控管
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The backward wave output amplified about four times was experimentally obtained.
实验得到了放大约四倍的后向波输出。
Third-order susceptibility has been determined by the ratio of the input probing beam in tensity to the backward wave intensity in four-wave mixing.
通过测量后向反射波与入射波的强度比，可以确定介质的三阶极化率。
In this paper, the first experiment of generating the phase conjugated backward wave by degenerate four-wave mixing in chlorophyll solution is reported.
本文报道在叶绿素溶液中用简并的四波混频得到位相复共轭后向反射波的首次实验。
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