A Review: Hybrid Optical Amplifiers in Wavelength Division Multiplexed Systems and Their Challenges/Future Scopes

Hybrid optical amplifiers (HOAs) are remarkably significant for wideband amplification of the data tributaries, as well as are extensively operational in ultra high capacity dense wavelength division multiplexed systems (DWDMs). We review this futuristic technology in the speedily emergent field of optical communication. Moreover, several configurations and arrangements of optical amplifiers are also discussed to comprehend the properties of optical signal boosters. Current study covers the various issues of hybrid optical amplifiers such as the gain flatness, noise figure, large gain bandwidth. Results revealed that the hybrid optical amplifiers exhibits better performance in terms of the gain flatness, less noise figure and supports high data rates. It is noteworthy that HOAs are important candidate in C+L band and also provide good performance without any expensive components for gain flattening.