Figure 1. Experimental implementation of time multiplexing for generating 1+1D mesh lattices.

(a) Two fiber loops of different lengths are connected by a 50/50 fiber coupler. Acousto-optical modulators (AOM) are used for generating an effective gain and loss distribution. The Bloch gradient is created by a phase modulator (PM) inside the short loop. Erbium doped fiber amplifiers (EDFA) are used in both loops to compensate for any unwanted losses. (b) A roundtrip inside the long (short) loop is equivalent to propagating from North West (North East) to South East (South West) on the lattice.