Phys. Rev. Lett. 91, 024801 (2003) [4 pages]Generation of a Self-Chirped Few-Cycle Optical Pulse in a FEL OscillatorReceived 3 December 2002; published 8 July 2003 We study the generation of a self-chirped optical pulse in a free-electron laser (FEL) oscillator. In a high-gain FEL oscillator, the frequency chirp is induced in the slippage region as a result of superradiant FEL resonance, and this time-frequency correlation evolves continuously into a few-cycle regime, if the optical cavity length is perfectly synchronized to the electron bunch interval. Numerical simulations based on the slowly evolving wave approximation and experimental results are presented. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.024801
DOI:
10.1103/PhysRevLett.91.024801
PACS:
41.60.Cr, 42.50.Fx, 42.65.Re
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