Figure 2
From: Test of mutually unbiased bases for six-dimensional photonic quantum systems
Sketch of experimental setup for generating and testing photonic MUBs in dimension six.
The polarization state is controlled by suitable sequences of wave plates, while the OAM mode is controlled by SLMs and single-mode fibers. Legend: SM - single-mode fiber; C - polarization compensation waveplates; HWP - half-wave plate; QWP - quarter-wave plate; MA - radial mode adjustment lens set; SLM - spatial light modulator; SPCM - single-photon counter module; PBS - Polarizing Beam Splitter.
