In this paper, we will review the types of optical amplifiers used in communication systems today as well as the parameters that limit the performance of optical amplifiers in the network, such as the noise figure, the gain saturation, the polarisation dependence gain and. In this paper, we will review the types of optical amplifiers used in communication systems today as well as the parameters that limit the performance of optical amplifiers in the network, such as the noise figure, the gain saturation, the polarisation dependence gain and. E ( t ) + n ( t ) Booster (power) amplifiers: Boost power into transmission fiber, low NF, high Psat. In-line amplifiers: Periodically amplify signal due to fiber attenuation, high G, high Psat. An illustration of the effective gainis given below. Note the presence of a gain peak around 1530nm and. 1- The signal is amplified with gain as in the following equation: ( d I[z ])/(d z) =g I but gain g can be saturated: g= g0/(1+ I(z) /Isat) where g0 is a characteristic value, and Isat, the saturation intensity is: Isat = ( spont/(2 stim)) h n where spont and stim are the. Optical amplifiers play a crucial role in modern communication networks by boosting optical signals without converting them into electrical signals. To ensure optimal performance, it's essential to understand the various performance parameters that define an optical amplifier's capabilities. The. Optical amplifiers are realised in a wide range of applications, such as metro – dense wavelength division multiplexing and cable television networks. It provides an expert-curated supplier directory, buyer-focused technical background information, and structured selection criteria to support professional procurement decisions. What are Optical Parametric.