Fig. 4From: Holographic and e-Beam Image Recording in Ge5As37S58–Se Nanomultilayer StructuresOptical arrangement for holographic grating recording with real-time measurement of diffraction efficiency by photodetector. CW DPSS laser (λ = 532 nm, power =100 mW). M Mirror, SF spatial filter, L collimating lens, BS beam splitter, LD laser diode (λ = 650 nm) for monitoring recording process, PR polarization retarder, PD photodetectorBack to article page