A broadband fiber transmission system includes a transmission line with at least
one zero dispersion wavelength o and transmits an optical signal
of . The transmission line includes a distributed Raman amplifier that amplifies
the optical signal through Raman gain. One or more pump sources are included and
operated at wavelengths p for generating a pump light to pump
the Raman amplifier. is close to 0 and 0
is less than 1540 nm or greater than 1560 nm.
