cavcalc.functions.resonance.fwhm

cavcalc.functions.resonance.fwhm(L, R1, R2)

Full-Width at Half-Maximum (FWHM) frequency of a cavity of length \(L\), where the first mirror has (power) reflectivity \(R_1\) and the second mirror has reflectivity \(R_2\).

In the equation below, \(\nu(L)\) is the FSR, and \(\mathcal{F}(R_1,R_2)\) is the finesse.

\[\mathrm{FWHM}(L, R_1, R_2) = \frac{\nu(L)}{\mathcal{F}(R_1, R_2)}\]