This calculator will help you to compute the different properties of a gaussian beam.



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$Z_R$=$\frac{\pi w^2_0}{\lambda}$

$\theta$= $2 \sqrt{\frac{\lambda}{Z_R \pi}}$

$d(z)$ = $2 w_0 \sqrt{1 + (\frac{Z}{Z_R})^2}$

$R(z)$=$z[1+(\frac{Z_R}{Z})^2]$


Laser Wavelength $\lambda$, Waist radius $w_0$, Distance to waist radius $z$, Far field divergence angle $\theta$, Rayleigh length $Z_R$, Spot diameter at Z $d(z)$, Radius of wavefront curvature R(z)

Input
Laser wavelength $\lambda$:
nm
Waist Radius $w_0$:
μm
Distance to Waist Radius $z$:
mm


Output

Rayleigh Length, $Z_R$:
mm

Far field Divergence Angle, $\theta$:
degree (°)


Spot Diameter at Z, $d(z)$:
mm

Radius of Wavefront Curvature, $R(z)$:
mm