Generation of a self-chirped few-cycle optical pulse in a FEL oscillator |
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Authors: | Hajima Ryoichi Nagai Ryoji |
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Institution: | Advanced Photon Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319-1195 Japan. hajima@popsvr.jaeri.go.jp |
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Abstract: | 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. |
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