Incident transverse intensities of PG beams in source plane (z = 0) for λ = 1550 nm, x₀ = y₀ = 1.064 × 10⁻² mm with (a) ω₀ = 5 × 10⁻² mm, and (b) ω₀ = 0.1 mm, and (c) ω₀ = 3 mm, respectively.