Laser Focusing & Spot Size Simulator

Visualize Gaussian beam focusing in real time. Adjust Focal Length, Input Beam Diameter, and M² Beam Quality to calculate focused spot size, depth of focus, and peak intensity instantly.

w₀ = M²λf / πwin I₀ = 2P / πw₀²
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Beam Input
Input Beam Dia. D 5.0 mm
M² Beam Quality 1.0
Focusing Lens
Focal Length f 50 mm
f-number (f/#) f/10
Transmission 96%
Power & Target
Input Power P 1.0 W
View Range ±3 × DOF
Target Material
Live Readouts
Spot dia. 2w₀
Rayleigh z_R
Depth of Focus
BPP
Peak Intensity

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