DWDM System Amplifiers

DWDM System Amplifiers DWDM EDFA is key component in DWDM network. It uses an optical supervisory channel power adjustment and extends the power link budget for long distance DWDM communication systems. There are three main types of optical amplifiers:... More

DWDM System Amplifiers
DWDM EDFA is key component in DWDM network. It uses an optical
supervisory channel power adjustment and extends the power link budget for
long distance DWDM communication systems.
There are three main types of optical amplifiers: fiber amplifiers (EDFAS),
semiconductor optical amplifiers (SOAs), and Raman amplifiers. Fiber
amplifiers use rare earth elements usually erbium, but also praseodymium,
tellurite, neodymium, and others as dopant that are pumped with a laser of
either 980 to 1480nm. The most common used for WDM network are the
EDFAs.
Types of EDFAs used for DWDM
1 Erbium-doped fiber amplifiers-EDFA. They are low noses figure
approximately 5dB and wide application bandwidth. The EDFA is pumped at
980nm 0r 1480 nm.
2 Erbium-doped fluoride fiber amplifiers (EDFFA) provide for flatter gain
spectrum without any gain flattening that introduces loss. They can absorb
more erbium than silica producing flatter
band across the erbium pass band, allowing the 1530 nm Less