This paper reviews optical amplifier technologies for risks of eye and skin damage, and the possibility of fire and telecommunications networks. The operation and applications of explosion if the beams are not properly confined [3]. erbium doped fibre amplifiers (EDFAs), fibre Raman amplifiers Moreover, in extreme circumstances, the fibre itself can be (FRAs), erbium doped waveguide amplifiers (EDWAs) and irreversibly damaged by the "fibre fuse effect" [4]. Amplifiers semiconductor optical amplifiers (SOAs) are described. The generate noise, which reduces the signal to noise ratios (SNR) factors that influence their gain, operating bandwidths, spectral g, the signal to noiseatis (SR spcr of the signals that pass through them and increases the profiles and noise are also discussed.system's bit error rate (BER) [5]. Moreover, the exiting

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