cavcalc.functions.symmetric.divang_of_gsingle

cavcalc.functions.symmetric.divang_of_gsingle(L, wl, gsingle)

Divergence angle of the beam in a symmetric cavity of length \(L\), with mirror g-factors of \(g_s\); where the beam has wavelength \(\lambda\).

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