Evolution of oscillator-type THz-FEL radiation power

Oscillator-type FELs are low-gain FELs. By using an optical cavity, the radiation interacts with a fresh electron beam multiple times and is amplified to saturation multiple times.This data records the power profile of the oscillator FEL from the initial small-signal gain to the exponential gain and finally saturation .The resonance wavelength is 14 μm. The post-processing program makes it easy to process the data and get the desired results.In addition, the data can be used to analyze sideband instability effects after radiative saturation.