Schematic of the experimental setup for measuring real-time polarization hologram diffraction kinetics. BS₁ and BS₂, beam splitters; PBS, polarization beam splitter; , mirrors; , continuously adjustable attenuators; , polarizer; , quarter-wave plates; and , Shutters; , digital power meter; , digital oscilloscope; LD, 405 nm laser diode; He-Ne: 633 nm Helium-Neon laser; , object beam; , reference beam; , reconstruction beam; , diffracted beam; , erasing violet light.