Superposition of chirped fibre Bragg grating for third-order dispersion compensation over 32 WDM channels

Multiple superposition of fibre Bragg gratings was used to fabricate a dispersion compensator that operates over 32 WDM channels. The channel spacing is 100 GHz and the total operation bandwidth is 25 nm. The dispersion was adjusted on a per-channel basis allowing for a compensation up to the third order.