Extended Data Fig. 1: Schematic illustration of the full experimental set-up.

AL: aspherical lens; AOFS: acousto-optic frequency shifter; APD: avalanche photodiode single photon detector; BPF: band-pass filter; LPF: long-pass filter; BS: beam splitter; PBS: polarizing beam splitter; SMF: single-mode fibre; PMF: polarization-maintaining single-mode fibre; PH-F: pinhole at Fourier image plane; PH-R: pinhole at real image plane; HWP: half-wave plate; QWP: quarter-wave plate; GM: galvo mirror system; FM: flip mirror; G: grating coupler.