| 波导FEL振荡器的孔耦合输出特性 |
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| 引用本文： | 姜云卿,王元璋.波导FEL振荡器的孔耦合输出特性[J].强激光与粒子束,1996,8(3):378-382. |
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| 作者姓名： | 姜云卿 王元璋 |
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| 作者单位： | 北京应用物理与计算数学研究所，国家863强辐射实验室五分室，100088 |
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| 摘 要： | 波长５００μｍ的远红外自由电子激光振荡器，是由平面被导和两个对称金属柱面镜组成的半封闭光腔．由于反射镜具有反射率，在下游镜的轴上开一个半径为Ｒｈ的圆孔来输出功率．孔耦合输出是一种简单、有效的输出方式，并可以广谱输出．缺点是抽取率随波长变化，计算很复杂．本文给出了用三维程序数值模拟结果．给出了腔内功率，输出功率，抽取率及腔镜边缘的衍射损失随小孔半径的变化．结果表明，选取适当的孔径，既可以有效地输出功率，又能保持较高的腔内功率和较纯净的腔模．
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| 关 键 词： | 波导 振荡器 孔耦合输出 自由电子激光器 hole coupling resonator extraction ratio diffraction loss higher-order mode output with wide range spectrum |
| 收稿时间： | 1900-01-01; |
SOME FEATURES OF A HOLE COUPLING RESONATOR FOR WAVEGUIDE FIR-FEL |
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| Jiang Yunqing and Wang Yuanzhang.SOME FEATURES OF A HOLE COUPLING RESONATOR FOR WAVEGUIDE FIR-FEL[J].High Power Laser and Particle Beams,1996,8(3):378-382. |
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| Authors: | Jiang Yunqing and Wang Yuanzhang |
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| Abstract: | A FIR –FEL resonator with wavelength 500m m is studied, which has a semi –closed optical cavity composed of a plane waveguide and two symmetric cylindrical metal mirrors. There is a hole of radius Rh on axis in the down –stream mirror. Some three-dimensional numerical results are given, which provide the interactive power, the output power, the extraction ratios and the diffraction loses on the mirror edge for various hole radius. If chewing an appropriate hole, so interactive power and good cavity modes can be obtained, and outputting the power very effectively. |
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| Keywords: | hole coupling resonator extraction ratio diffraction loss higher-order mode output with wide range spectrum |
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