Topmusicanswers
- What is meant by Gaussian beam?
- Why laser beam is Gaussian?
- What is Gaussian beam diameter?
- What is Gaussian beam waist?
What is meant by Gaussian beam?
In optics, a Gaussian beam is a beam of electromagnetic radiation with high monochromaticity whose amplitude envelope in the transverse plane is given by a Gaussian function; this also implies a Gaussian intensity (irradiance) profile.
Why laser beam is Gaussian?
Gaussian beams are the lowest-order self-consistent field distribution in optical resonators (→ resonator modes) provided that there are no intracavity elements causing beam distortions. For that reason, the output beams of many lasers are Gaussian. ... There are so-called higher-order modes e.g. of Hermite–Gaussian type.
What is Gaussian beam diameter?
The beam diameter is generally defined as twice the beam radius – no matter what the particular definition of beam radius is. For Gaussian beams, the FWHM beam diameter is 1.18 times the Gaussian beam radius (1/e2 value).
What is Gaussian beam waist?
Figure 1: The waist of a Gaussian beam is defined as the location where the irradiance is 1/e2 (13.5%) of its maximum value. However, this irradiance profile does not stay constant as the beam propagates through space, hence the dependence of w(z) on z.
