Fig. 3: Experimental setup.
From: Phase-sensitive seeded modulation instability in passive fiber resonators

Simplified sketch of the experimental setup. A multi-heterodyne system, inspired from34, had been implemented to trigger and analyze the modulation instability effect and to analyze the output cavity field in real time (see top right examples of power and phase evolutions). We launched 10 ns pulses (see central panel) to avoid stimulated Brillouin scattering. F: Finesse, L: cavity length, SMF: single mode fiber 28, div : division, PD: photo-detector, and Oscillo: oscilloscope.