Hybrid fiber amplifier using a dispersion compensating Raman amplifier with a pump depolarizer

摘要

PURPOSE: A dispersion compensating Raman amplifier(DCRA) using a depolarizer is provided, which obtains a stable amplification signal by using the depolarizer to remove a polarization of a pump light, and a hybrid fiber amplifier using the same is provided, which increases an efficiency by combining the dispersion compensating Raman amplifier with an EDFA(Erbium Doped Fiber Amplifier). CONSTITUTION: According to the hybrid fiber amplifier using a dispersion compensating Raman amplifier(DCRA)(110), a dispersion compensating Raman amplification unit performs a dispersion compensating amplification of an incident light signal by making a Raman pump light, whose polarization is removed using a depolarizer, be incident in a reverse direction. And a fiber amplifier unit(120) receives the light signal amplified through the above dispersion compensating Raman amplification unit and then amplifies it again. The hybrid fiber amplifier further includes a density inversion improving unit to increase a front density inversion of the dispersion compensating Raman amplification unit.