Figure 2

(a-1) (a-2) Six-beam interference pattern, with wavelength λ = 488.0 nm and correlation angle θ = 0.0477 rad; (b-1) (b-2) Gaussian beam, with spot size ω0 = 2.20 μm; (c-1) cross-sectional graph of (a-2) and (b-2); and (c-2) intensity ratio between (a-2) and (b-2).