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).
Translation of income - English-Spanish dictionary. noun uk â /ËÉªÅÂ·kÊm/. âº the money that you regularly get, for example from your job. ingresos. Many families are on low incomes.