Experimental Observation of PT Soliton Collapse in 2D Synthetic Lattice

Using standard telecommunication equipment, we experimentally realize Parity-Time symmetry in a two-dimensional synthetic lattice with tunable gain, loss and phase structure. The fiber nonlinearity enables
$\mathcal{P}\mathcal{T}$
soliton collapse as an amplified, self-accelerating nonlinear wave packet. © 2019 The Author(s)