Figure 4
From: Transmission comb of a distributed Bragg reflector with two surface dielectric gratings
Transmission spectra of the (a) TE wave and (b) TM wave for several numbers of cells. In (c,d) the variations of the average free spectral range and FWHM are shown, respectively and their ratio is plotted in (e). For easy observation, the lines in panels (a,b) are offset in steps of 1 (
nm, fg = 0.5 and 
nm).
