The design of input coupler for a Ku-band coaxial FEL amplifier is presented. Main parameters are given.

设计了同轴波导FEL放大器的输入耦合器，给出了该输入装置的相关参量。

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Pumping coupler technology is one of the critical technologies for high-power laser and amplifier. And side-pumping is one of the promising technologies to obtain high-power laser and amplifier.

泵浦耦合技术是研究高功率光纤激光器和光纤放大器的关键技术，而侧面泵浦耦合技术又是通过泵浦耦合技术获取高功率光纤激光器的未来发展趋势。

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