Figure 3: Experimental apparatus for input state preparation.
From: Suppression law of quantum states in a 3D photonic fast Fourier transform chip
(a) The photon source (IF, HWP, PBS, PC, PDC, DL and SMF). (b) Photon injection (extraction) before (after) the evolution through the interferometer. DL, delay lines with motorized stages; FA, fibre array; HWP, half-wave plate; IF, interferential filter; PBS, polarizing beam splitter; PC, polarization compensator; PDC, parametric downconversion; SMF, single-mode fibre.
