Doped fiber amplifier (The typical representative: EDFA) Erbium-doped fiber amplifier (EDFA) is the most widely used fiber-optic amplifiers, mainly made of Erbium-doped fiber (EDF), pump light source, optical couplers, optical isolators, optical filters and other components.
Noun. 1. national income-the total value of all income in a nation (wages and profits and interest and rents and pension payments) during a given period (usually 1 yr).
Notes on National Disposable Income (NDI)! It is defined as net national product at market prices (NNPMP) plus net current transfers from rest of the world. Symbolically: National disposable income = National income + Net indirect taxes + Net current transfers from rest of the world simply put. Net Disposable Income Is the Income which is at the disposal of the nation as a whole for spending or disposal.