Moreover, in order to improve the EDWA performance, the parameters are optimized such as pump power and waveguide length.

并且为了全面发挥掺铒玻璃波导放大器的性能，需要抽运功率、波导长度等各个参量配合起来。

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The size of EDWA is also discussed here, which has some reference value for the following study and the design of waveguide amplifier.

此外本论文还讨论了截面尺寸的影响，对以后的研究工作和波导放大器的设计具有一定的参考意义。

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Er3 + -doped optical waveguide amplifier (EDWA) become the hotspot of study because of its advantage like small volume, high gain etc.

掺铒光波导放大器以其体积小、增益高等优点而成为研究的热点。

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Born in 1951 in a rambling brick house where geese and ducks roamed freely in the dusty Nile Delta village of Edwa, north of Cairo, Mr Morsi was the eldest of five brothers.

ECONOMIST: The new president looks like a typical Brother

Mr Morsi claims to have disliked life in America, but two of his sons were born there and he lingered for several years after earning a doctorate before heading home to teach at the University of Zagazig, up the road from Edwa.

ECONOMIST: Muhammad Morsi: An ordinary man | The