HOLE COUPLING RESONATOR FOR FREE-ELECTRON LASERS

被引:23
作者
XIE, M
KIM, KJ
机构
[1] Lawrence Berkeley Laboratory, Berkeley, CA 94720
关键词
D O I
10.1016/0168-9002(91)90978-Y
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The performance of two mirror resonators with holes for output coupling is studied for free electron laser application using a Fox-Li type code. The mode profiles inside and outside the cavity, the diffraction losses at the mirror edges and apertures, the amount of useful power coupled through the hole, etc., are calculated for the dominant mode for different hole and mirror dimensions. It is found that resonators in near concentric geometry can develop a mode degeneracy in certain cases, which should be avoided for the stability of the free electron laser gain and output. A resonator configuration for a free electron laser at Lawrence Berkeley Laboratory was found which can provide satisfactory performance over a wavelength range from 25 to 50-mu-m. The possibility of further increasing the tuning range by an adjustable intracavity aperture is discussed.
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页码:792 / 796
页数:5
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