Cavity Q-factor & Photon Lifetime

Resonance Frequency ν₀ FWHM Bandwidth Δν

Input Parameters:
ν₀ = Resonance frequency
Δν = FWHM bandwidth

$$ Q = \frac{\nu_0}{\Delta \nu} $$

Q = ?

$$ \tau = \frac{Q}{2\pi \nu_0} $$

τ = ?

Output Parameters:
Q = Cavity Q-factor
τ = Photon lifetime