Influence of l
on fringe spectrum and dependence of fringes and EOT with l
. Influence of AAO lp on the Fabry-Perot fringe spectrum. (a) Series of interference spectrums obtained from AAO with lp from lp = 0.3 μm to lp = 12 μm (dp = 40 nm were kept constant). No fringes were observed below lp = 0.3 μm, and baby fringes were observed above 9.6 μm. (b) Graph showing dependence of the number of fringes and EOT with lp. Regions with lo (2.5 μm > lo < 5 μm) and lc (0.3 μm <lc > 9.6 um) are marked in the graph.