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).
National wealth is a measurement of the real assets used to produce GDP in the economy. Financial assets are claims on those assets held by individuals. Financial assets owned by households represent their claims on the real assets of the issuers, and thus show up as wealth to households.