An optimum fiber structure for a practical dispersion-compensating fib
er (DCF) has been explored theoretically and experimentally, taking di
spersion, attenuation bending loss characteristics, polarization mode
dispersion, and nonlinear effects into account. A high figure of merit
(FOM) of 280 ps/nm/dB has been successfully achieved with a simple ma
tched cladding design. Furthermore, it was confirmed that the optimize
d structure with enhanced FOM also benefits self-phase modulation (SPM
) suppression.