Use of hybrid Raman/erbium-doped fiber amplifiers in DWDM system.

摘要

Erbium-doped fiber amplifiers (EDFA) and distributed Raman amplifiers (DRA) used in Dense Wavelength Division Multiplexing (DWDM) systems are analyzed and simulated. The parameters of amplifiers are optimized for the advanced optical fiber communication systems. EDFA provides advantages such as high power conversion efficiency, low cross-talk, etc. Whereas DRA provides advantages such as broad bandwidth, low noise, high optical signal-to-noise ratio (OSNR), etc. By judicious combination of EDFA and DRA, hereafter referred to as the hybrid, the system performance can be improved compared with EDFA alone. This hybrid combination yields a 13.5 dB improvement in OSNR and peak Q factor of 12.1 for the hybrid vs. a peak of 8.1 when EDFA is used alone. An ultra-wide 10 THz (81.46 run) 3-dB gain bandwidth can be achieved by using the hybrid system.