# Parameters

wox: half width of the beam waist in the XZ plane

woy: half width of the beam waist in the YZ plane

lam: wavelength

M2x: M square factor (M2) in the XZ plane

M2y: M square factor (M2) in the YZ plane

x: coordinate along the X axis

y: coordinate along the Y axis

z: distance from the waist to the plane perpendicular to the beam axis

P: power of the laser beam

Imax : on-axis intensity at the distance z from the waist

Ixy : intensity at the point with the coordinates x and y in the plane at the distance z from the waist