Sagnac Interferometer Based Generation of Controllable Cylindrical Vector Beams

Figure 1

Schematic of experimental setup: attenuator; spatial filter; collimator; M, mirror; HWP, half-wave plate; PBS, polarizing beam splitter; PAL-SLM, optically addressable spatial light modulator; L, lens; P, iris diaphragm; QWP, quarter-wave plate; analyzer; and CCD. The inset shows the patterns of two compound holograms displayed on PAL-SLM for azimuthal (left) and azimuthal-radial (right) vector beams.