cavcalc.functions.symmetric.gsingle_of_divang

cavcalc.functions.symmetric.gsingle_of_divang(L, wl, theta)

Mirror stability factor for a symmetric cavity of length \(L\) with an eigenmode with divergence angle \(\theta\); where the beam has wavelength \(\lambda\).

\[g_s(L, \lambda, \theta) = \frac{ 1 - \left(\frac{L\pi}{2\lambda}\right)^2 \tan^4{\theta} }{ 1 + \left(\frac{L\pi}{2\lambda}\right)^2 \tan^4{\theta} }\]