An amplifier does not provide the regeneration ability of a repeater, but loss, rather than distortion is generally the limiting factor in the design of an optical communications system. In contrast, an optical amplifier can amplify all of the wavelengths in a single device and works for all modulation formats. Electrical repeaters are also limited in bandwidth and modulation format. Also, since one repeater is required for each wavelength, and many tens of wavelengths may be transmitted down a single fiber, a lot of equipment is required for each fiber. Electronic vs optical regeneration Дue to the high data rates that can be achieved with optical systems, OEO repeaters are expensive to implement as electronics to handle those high data rates are expensive and difficult to construct. Note that this class of device is sometimes called 'Optical Amplifier Repeater'. The key advantage of all-optical regeneration is the power efficiency provided by the device and simpler integration into an optical network.Д¬ost efficiency has led to OEO repeaters being largely replaced in long-haul systems by optical amplifiers since one ( broadband) amplifier can be used for many wavelengths in a Wavelength Division Multiplexing (WDM) system. Non-linear optical fibers allow the use of frequency shifting and frequency generation effects for regeneration. 3RВ : in addition to reamplification and reshaping, retiming of data pulse is done.ДЄn alternative method of regeneration is through all-optical regenerators without the additional requirement to convert back and forth between optical and electronic signals.2RВ : in addition to reamplification, pulse reshaping is carried out.By using 3R regenerators, it is possible to recover the original bit sequence and. RВ : reamplification of the data pulse alone is carried out. OptiSystem Component LibraryOptical Communication System Design.Optical regenerations are classified into 3 categories by the 3 R's scheme.

Optisystem 3r regenerator