Figure 2
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 the DBR, G/DBR and G/DBR/G. The vertical axises in (a,b) are separated into logarithmic and linear regions. In (c,d) the variation of the average FWHM with the grating height and duty cycle are shown, respectively. The parameters used are 
nm, 
, 
nm and fg = 0.5.
