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).
May 26, 2015 at 5:05PM. Annual net income (or sometimes just net income) is a phrase that investors throw around alot. And supposedly we all know what it means: It's the bottom line, the income that is left after everything else is deducted.