% FP Cavity HOM Frequencies Estimate % Alberto Stochino, October 2008 R1 = 7280; % Mirror1 radius of curvature R2 = 57.57; % Mirror2 radius of curvature L = 38.458; % Length of the FP Cavity n = 1; % X Order of the Mode m = 0; % Y Order of the Mode c = 299792458; % Speed of Light g1 = 1 - L/R1; % g1 factor g2 = 1 - L/R2; % g2 factor fsr = c/2/L f_plus = (1+(m+n+1)*acos(sqrt(g1*g2))/pi)*c/2/L % f_minus = (1+(m+n+1)*acos(-sqrt(g1*g2))/pi)*c/2/L