Fig. 9
From: Intensity noise as a driver for transverse mode instability in fiber amplifiers
Transfer function of the pump- and seed-RIN to the RIN of the output signal for an Yb-doped fiber amplifier as a function of the modulation frequency (x-axis) and the seed power (y-axis), adapted from [25]. a Transfer function of the pump-RIN: a low-pass behavior can be observed for a strong saturation (i.e. high seed power). b Transfer function of the seed-RIN: a high-pass behavior can be observed for a strong saturation (i.e. high seed power). The white dotted lines represent the frequency components (1 Hz…2 kHz) and the average power (5 W) of the seed radiation used in the experiments and simulations presented in this work