Gaussian Beam Waist calculator
Waist radius and Rayleigh range of a focused Gaussian beam.
Category: Diffraction
Formula: w₀ = (λ·f/(π·w))/√(1 + (λ·f/(π·w²))²) · zR = π·w₀²/λ
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| λ | lam | nm | 1064 |
| Focal length | f | mm | 100 |
| Input waist | w | mm | 2 |
Result with the default inputs
- Waist w₀: 16.9335 µm
- Rayleigh zR: 0.8466 mm
- Divergence: 20.0007 mrad
Open it with your own values: put each input in the address as a parameter, for example /calculators/gaussian-beam-waist?lam=1064. A unit other than the listed one goes in <parameter>_unit.