Title :
Nonlinear harmonic generation in free-electron lasers
Author :
Freund, H.P. ; Biedron, S.G. ; Milton, S.V.
Author_Institution :
Sci. Applications Int. Corp., McLean, VA, USA
fDate :
3/1/2000 12:00:00 AM
Abstract :
A three-dimensional nonlinear simulation code to treat multiple frequencies simultaneously is described and used to study nonlinear harmonic generation in free-electron lasers (FELs). Strong nonlinear harmonic gain is found where the gain length varies inversely with the harmonic number. Substantial power levels are found in the harmonics. The odd harmonics are favored with generally higher power levels since a planar wiggler geometry is employed; however, the second harmonic exhibits substantial power as well. The analysis is relevant to the emission expected from self-amplified spontaneous emission (SASE) free-electron laser schemes.
Keywords :
codes; free electron lasers; laser theory; optical harmonic generation; spontaneous emission; wigglers; 3D nonlinear simulation code; FEL; SASE free-electron laser schemes; free-electron lasers; gain length; harmonic number; higher power levels; multiple frequencies; nonlinear harmonic generation; odd harmonics; planar wiggler geometry; power levels; second harmonic; self-amplified spontaneous emission; strong nonlinear harmonic gain; substantial power; three-dimensional nonlinear simulation code; Analytical models; Electron beams; Free electron lasers; Frequency conversion; Gaussian processes; Laser theory; Nonlinear equations; Power system harmonics; Spontaneous emission; Undulators;
Journal_Title :
Quantum Electronics, IEEE Journal of
