Figure 1
From: Direct transfer of classical non-separable states into hybrid entangled two photon states
Direct generation of hybrid entangled two photon states. (a) Schematic of the experimental setup. Laser 405 nm, continuous wave single frequency diode laser at 405 nm providing 70 mW of output power; λ/2, half-wave plate; PBS1-2, polarizing beam splitter cube; SPP, spiral phase plates; M, mirrors; schematic marked in yellow represents polarization Signac interferometer; C, dual-BIBO crystal having optic axis orthogonal to each other for the generation of entangled photons; A, analyser; λ/4, quarter wave plate; IF, interference filter; D1-2, single photon counting module (SPCM); TDC, time-to-digital converter. (b) Analyser comprises with PBS and λ/2. Spatial distribution of the (c) non-separable pump beam, (d) conditioned idler photon and (e) heralded signal photons.
