What is 1R, 2R & 3R regeneration?
There are three different levels of optical regeneration that can be employed to enable signals to be transported greater distances. • 1R- amplification: This regeneration technique adds optical power to the signal without affecting the shape or timing of the signal. The EDFA simply adds photons to the incoming optical signal at the specific wavelength and phase of that signal. It does not reshape or retime (apply synchronization) to the incoming signal. A byproduct of the EDFA is the generation of amplified spontaneous emission (ASE) noise which accumulates with each EDFA and can only be “cleaned up” by converting the optical signal to electrical and then back to optical. Typically the number of cascaded EDFA’s. is limited to four or five. • 2R- amplification and reshaping: This technique reshapes the deteriorated signal along with using basic amplification techniques. The signal shape is recreated to resemble the original signal but does not apply synchronization or timing to the sig
