Author/Authors :
Leemans، نويسنده , , W.P. and Conde، نويسنده , , M.E. and Govil، نويسنده , , R. and van der Geer، نويسنده , , B. and de Loos-Vollebregt، نويسنده , , M. and Schwettman، نويسنده , , H.A. and Smith، نويسنده , , T.I. and Swent، نويسنده , , R.L.، نويسنده ,
Abstract :
We report observations on sideband generation and transition to chaos in an infrared free electron laser operating at a wavelength λr of 4 μm with a low loss optical cavity. The temporal evolution of the radiation spectrum through the complete macropulse has been measured on a micropulse to micropulse basis [1]. Stable sidebands are observed for small cavity detuning with frequency offsets in good agreement with calculations. For even smaller cavity detuning, self-oscillations occur with the main laser wavelength varying by up to 2%. Using a wavelength stabilization system based on RF feedback [2], we have suppressed these wavelength fluctuations without loss of peak power.
