Echoes of past solitons

Caging pairs of propagating solitons in a fibre ring resonator allows scientists to observe the solitons travelling astronomical distances, revealing the effects of extremely tiny forces exerted by the leading soliton on the trailing one.

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Figure 1: The leading soliton generates an acoustic wave, which propagates back and forth in the cross section of the fibre (inset).
Figure 2: a, Expanded view of the refractive-index profile around the first echo at 21 ns.


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Correspondence to Franco Prati.

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Prati, F. Echoes of past solitons. Nature Photon 7, 586–587 (2013).

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