Via an optical fiber transmission system with a distributed raman amplifier and a remote pumped - erbium doped fiber amplifier

摘要

The disclosed optical fiber communication system comprises a remotely pumped erbium-doped fiber amplifier (EDFA). The pump radiation is de- tuned with respect to wavelength, the wavelength being selected longer than both the optimal wavelengths for pumping the EDFA and for producing Raman gain in the transmission fiber, respectively. Such de- tuning results in improved over-all system performance through reduced multi- path interference. Exemplarily, the pump radiation has wavelength in the range 1490-1510 nm.