Hybrid fiber amplifier using dispersion compensating raman amplifier

摘要

The invention relates to a hybrid fiber amplifier in which a dispersion compensating Raman amplifier is associated with an erbium doped fiber amplifier to enhance the amplifier efficiency. It is an object of the invention to provide a dispersion compensating Raman amplifier(DCRA) by inducing Raman pump light into a dispersion compensating fiber to obtain a Raman gain in which a depolarizer is used to eliminate the pump light polarization dependent Raman gain, and a hybrid fiber amplifier in which the DCRA is associated with an erbium doped fiber amplifier(EDFA) to enhance the efficiency. The hybrid fiber amplifier using a dispersion compensating amplifier comprises dispersion compensating Raman amplifier unit for performing a dispersion compensating amplification to an incident optical signal by launching Raman pump light, which is depolarized by a depolarizer, backwardly; and fiber amplifier unit for receiving and amplifying again the optical signal amplified via the dispersion compensating Raman amplifier unit.