Gaussian Beam

Wiki

A searchable home for the optics notes behind the calculator: formulas, propagation rules, design patterns, and worked laser layout examples.

Gaussian beam optics: formulas and propagation

The core quantities and transformations: waist radius, Rayleigh range, divergence, Gouy phase, q parameter, ABCD propagation, thin-lens focusing, paraxial limits, and beam quality.

Foundations ABCD Focusing M2
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Laser beam expander design: Galilean and Keplerian telescopes

How to choose and space two-lens beam expanders, compare Galilean and Keplerian layouts, and open a worked 852 nm fiber example in the calculator.

Design Telescope Galilean Example
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