Long-Wavelength-Band Optical Amplifiers Employing Silica-Based Erbium Doped Fibers Designed for Wavelength Division Multiplexing Systems and Networks

摘要

Wavelength-division multiplexing (WDM) tech- nique employing broadband erbium-doped fiber amplifiers (ED- Fas) is considered to be the most effective solution to respond to extend the optical bandwidth outside the conventional band (C- band) ranging from 1530 to 1565 nm, silica-based EDFAs (EDS- Fas) operating within the long-wavelength band (L-band) rang- ing form 1570 to 1600nm seem to be the most attractive candi- date because they can be composed of the same material as C- band EDSFAs, i.e. silica-based Al codoped EDF.