Fig. 3: Gain saturation response.
From: All-fiber optical nonreciprocity based on parity-time-symmetric Fabry-Perot resonators
Gain saturation response of a single FP resonator shown in Fig. 2c, a with a fixed probe power of -15 dBm, and b with a fixed pumping power of 100 mW. The effective mode field diameter of the fiber is 6.9 μm.
