Modulation instability, three mode regimes and harmonic generation at the Novosibirsk terahertz free electron laser

Different mode regimes vs. extent of stabilization of modulation instability were investigated with a complex diagnostics system. Slippage due to detuning of the frequencies of electron and light pulses turned out to be the main stabilization factor. Spectral and time parameters of the laser, especially radiation of high harmonics, have been shown to strongly depend on the stabilization.