Fig. 3: Modal decomposition with relative amplitude resolution.
From: Universal photonic processor for spatial mode decomposition

Superposition of LG0,−3, and LG0,3 modes. a–d Beam with a relative mixture of (0.42, 1). e–h (0.66, 1). i–l (1, 1). m–p (1, 0.66). q–t (1, 0.42). Column 1 shows the target field from the SLM with overlaid sampling points; column 2 displays the measured amplitude and phase; column 3 presents the modal decomposition; and column 4 shows the reconstructed beam.