Fig. 1
From: Optical analogue of the dynamical Casimir effect in a dispersion-oscillating fibre
Dynamical Casimir effect in a dispersion-oscillating fibre. a Concept of the Dynamical Casimir effect (DCE) in a dispersion-oscillating fibre (DOF): a short pulse propagating though the fibre experiences a fast modulation of the group velocity dispersion (GVD). b Schematics of the experimental setup for quantum correlation measurements. Signal and idler beams generated inside the DOF are separated and filtered from the pump by a 4-f grating system. A half wave plate (HWP) is used to rotate the polarization and gratings are labelled G1, G2 and G3. Photons are detected by single photon avalanche detectors (SPAD) named s1, s2 and i
