Laser Beam Divergence Calculator — Free Online Tool
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Laser Beam Divergence Calculator

Calculate laser beam divergence angle and spot size

Instructions: Enter the laser wavelength ($\lambda$), beam waist radius ($w_0$), and propagation distance ($z$) to compute the beam divergence angle and spot radius at distance.
Optical Parameters

Calculation Results

⚠️ For laser physics and optics education reference only. Assumes fundamental Gaussian beam ($TEM_{00}$) mode.

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