D. Atkinson et al., NUMERICAL STUDY OF 10-CM CHIRPED-FIBER GRATING PAIRS FOR DISPERSION COMPENSATION AT 10 GB S OVER 600 KM OF NONDISPERSION SHIFTED FIBER/, IEEE photonics technology letters, 8(8), 1996, pp. 1085-1087
We examine illustrative cases for fiber-grating-based dispersion compe
nsation over 600 km of nondispersion shifted fiber at 10 Gb/s and show
that a pair of 10 cm, 95% reflectivity gratings require apodization t
o avoid pattern dependency, Approximately 70% apodization provides the
best balance between restricted bandwidth and inexact dispersion comp
ensation. Greater tolerance to apodization, bandwidth, and system leng
th is achieved using gratings with approximate to 50% reflectivity. Th
e effects of fiber nonlinearity are reduced by locating gratings at 20
0 and 400 km, this configuration also improves the tolerance to total
system length and launched power.