Recent progress on FBG-based tunable dispersion compensators for 40 Gb/s applications

100 Gb/s DQPSK field trial: Live video transmission over an operating LambdaXtreme® network

“…The signal is input to a standard optical preamplifier stage consisting of two L-band EDFAs and a single wavelength interference filter (OF) with a 3 dB bandwidth of 2 nm. Any residual chromatic dispersion is compensated using a commercially available fiber Bragg grating based tunable dispersion compensator (TDC) that has a tuning range Ϯ400 ps/nm and an operating bandwidth of 80 GHz [29]. Then the signal is optionally passed through an optical equalizer (OEQ) to mitigate distortions arising from limited modulator and driver bandwidths and/or from narrowband optical filters.…”

Physical insights into inverse-scattering profiles and symmetric dispersionless FBG designs

“…Their versatility stems from the ability to control very accurately their reflection and dispersion characteristics by proper design. Linearly-chirped FBGs have been used extensively over the years for 2nd-order dispersion compensation in optical communication transmission systems [4,5]. Even with the current effectiveness of electronic dispersion compensation, FBG-based linear dispersion compensators are expected to continue to play a role in hybrid compensation schemes in future high speed optical systems [6,7].…”