3D-Simulations of Transverse Optical Modes of the Free Electron Laser Resonator with Hole Output Coupling
Year: 2006
Communications in Computational Physics, Vol. 1 (2006), Iss. 5 : pp. 920–929
Abstract
The transverse construction of optical modes in the wiggler is calculated and the numerical simulations of the free-electron laser hole-coupled resonator are carried out. These 3D-simulations include optical amplitude distributions, modes evolvement of optical field and the influence of hole-radius on the distributing of modes. The numerical simulations confirm that the fraction of the even-order modes increase in the start-up stage and then decreases in the exponential gain stage. Moreover, it is found that the fundamental mode is dominant in the saturate stage. Based on this observation, we estimate the optical output coupling by using the the fundamental mode. It is found that the numerical results and the first-order estimate are in good agreement for a range of the hole size.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/2006-CiCP-7987
Communications in Computational Physics, Vol. 1 (2006), Iss. 5 : pp. 920–929
Published online: 2006-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 10
Keywords: Free-electron laser