Laboratory experiment with Helium-Neon laser: Gain and oscillation spectral widths

摘要

The relationship between gain and oscillation spectral profiles is studied and analysed from an educational perspective. A theoretical explanation based on simple models is presented. Expressions of spectral profiles and widths are deduced by means of this theory. Spectral profiles and widths are measured with a laboratory experiment based on low-cost lasers. Theoretical and experimental values are in agreement.