Laser Cavity Modes

Standing wave modes in a Fabry-Pérot laser cavity. The gain curve selects which longitudinal modes oscillate. Watch photons bounce between mirrors.

Cavity length L: 1.00m
Gain center (THz): 300
Gain bandwidth: 30THz
Photon speed: 2.0

Mode frequencies: ν_q = q·c/(2L) | Mode spacing FSR = c/2L | Modes within gain bandwidth lase