Fig. 2. Experimental results of the build-up of bidirectional solitons: clockwise (top) and counter-clockwise (bottom) (see Visualization 1 and Visualization 2). (a),(c) The real-time spectral and (b),(d) the field autocorrelation evolution with the characteristic cross sections. (e) Energy evolution of clockwise (CW) and counter-clockwise (CCW) pulses. Inset: breathing dynamics zoom-in.