Interconnect example ring resonator
In the example here for coupled ring resonator filterhttps://support.lumerical.com/hc/en-us/articles/360042819293-Coupled-ring-resonator-filters. I was looking at the interconnect example optics_letters_vol26_n_12_jun2001_917_fig2_N5.icp. In this example, the total length of the ring, Lr=2997.92458 and Lc=1498.96229. How do we determine Lr and Lc? And what is nr, and why is it 100?