Gaussian Beam Waist, Divergence & Rayleigh Range Calculator
Compute Gaussian laser beam propagation parameters: Rayleigh length (z_R), far-field divergence angle (θ), spot radius w(z), and wavefront radius of curvature R(z).
Beam & Wavelength Inputs
E.g., 632.8 (He-Ne red), 532 (DPSS green), 1064 (YAG), 1550 (Telecom C-band)
1/e² intensity radius at focus
Distance from waist plane
M² = 1.0 is ideal diffraction-limited fundamental mode
Propagation Profile at Distance z
Rayleigh Range (z_R)
-
Confocal Parameter b = 2 · z_R
Spot Radius w(z)
-
-
Divergence Half-Angle θ
--
Full Divergence (2θ)
--
Wavefront Radius R(z)
--
Gouy Phase Shift & Intensity Ratio
Gouy Phase: -- rad (--°) | On-axis Intensity: -- % of peak
Recommended Tools & Equipment
Tested hardware and components for high reliability
100% Free Tool
Zero Sign-Up