Sinc-sampled fiber Bragg gratings for identical multiple wavelength operation

Through a periodic sine modulation of the refractive index-profile in fiber Bragg gratings (FBG's), we demonstrate gratings with multiple equally spaced and identical wavelength channels. We show 10-cm-long gratings with 4, 8, and 16 identical uniform wavelength channels separated by the ITU spacing of 100 GHz and a 22.5-cm-long grating with four identical dispersion compensating channels with a 200-GHz separation designed to dispersion compensate 80-km data transmission through standard fiber at 1.55 mu m.