Nonlinear harmonic generation of coherent amplification and self-amplified spontaneous emission

被引:39
作者
Huang, ZR [1 ]
Kim, KJ [1 ]
机构
[1] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
关键词
nonlinear harmonic generation; coherent amplification; self-amplified spontaneous emission;
D O I
10.1016/S0168-9002(01)01553-4
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Nonlinear harmonic generation in a uniform planar undulator is analyzed using the three-dimensional Maxwell-Klimontovich equations that include both even and odd harmonic emissions. After a certain stage of exponential growth, the dominant nonlinear harmonic interaction is caused by strong bunching at the fundamental. As a result, gain length, transverse profile, and temporal structure of these harmonic radiations are eventually determined by those of the fundamental. Transversely coherent third-harmonic radiation power is found to approach one percent of the fundamental power level for current high-gain FEL projects, while the power of the second-harmonic radiation is less but still significant for relatively low-energy FEL experiments. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:112 / 117
页数:6
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