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We present experimental evidence of the universal emergence of the Peregrinesoliton predicted in the semi-classical (zero-dispersion) limit of the focusingnonlinear Schr\"{o}dinger equation [Comm. Pure Appl. Math. {\bf 66}, 678(2012)]. Experiments studying higher-order soliton propagation in optical fiberuse an optical sampling oscilloscope and frequency-resolved optical gating tocharacterise intensity and phase around the first point of soliton compressionand the results show that the properties of the compressed pulse and backgroundpedestal can be interpreted in terms of the Peregrine soliton. Experimental andnumerical results reveal that the universal mechanism under study is highlyrobust and can be observed over a broad range of parameters, and experimentsare in very good agreement with numerical simulations.

Universal Peregrine soliton structure in nonlinear pulse compression in optical fiber