Abstract

Using standard telecommunication equipment, we present an experimental platform for investigating Parity-Time ($P\mathcal{T}$) symmetry in a two-dimensional synthetic lattice with tunable gain, loss and phase structure. By exploiting the fibre nonlinearity, dissipative $P\mathcal{T}$ solitons and wave collapse are realized, for which the later one gives rise to an amplified, self-accelerating nonlinear wave packet. Following a concept developed in [1], we present a novel protocol for realizing $P\mathcal{T}$-symmetry in a 2D synthetic lattices based on mixed short and long-range coupling. Our set-up (see Fig. 1a) consists of two pairs of slightly dissimilar coupled fibre loops, where each fibre patch is approximately 30 km long.

© 2019 IEEE