UV uniform exposure can effectively vary the coupling characteristics of the annealed long period gratings (LPGs) in hydrogen loaded fiber.
写于载氢光纤上的长周期光纤光栅经过高温退火后 ，对其进行紫外均匀曝光能够有效改变其耦合特性。
Given the amplifier's gain curve without using any gain flattening techniques, the gain flattening filter consisting of three LPGs is designed.
结合不使用增益平坦技术条件下增益特性曲线的特点，设计了一种由三个LPG组成的均衡滤波器。
It is hoped that this research will be of theoretical significance and practical value for the construction and development of LPGs in middle schools in China.
作者希望本研究对于我国中学英语备课组建设具有指导意义和参考价值。
It is hoped that this research will be of theoretical significance and practical value for the construction and development of LPGs in middle schools in China.
作者希望本研究对于我国中学英语备课组建设具有指导意义和参考价值。
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