研究了在不同的光纤有效作用长度时，拉曼放大器增益与抽运功率的关系；
The relation between the gain of Raman amplifier and pump power at different effective interaction length of optical fiber is anlyzed.
本文介绍了密封面作用长度的快速检测装置，此装置适用于发动机中进排气门的在线检测。
This paper introduced the fast detection device of acting length of the sealing face which is suitable for on line detection of inlet and exhaust valve of the engine.
模式转换效率可化作声波频率、声光作用长度、波导厚度和声波功率密度的函数，并利用数值计算得出结果。
Mode conversion efficiency has been calculated as functions of acoustic frequency, interaction length, guiding layer thickness, and acoustic drive power density.
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