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).
In economics, a country's national savings is the sum of private and public savings. It is generally equal to a nation's income minus consumption and government purchases.ational savings should be split into private savings and public savings. A new term, T is taxes paid by consumers that goes directly to the government as shown here: (Y-T) is disposable income. (Y-T) less consumption (C) is private savings.