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).
What Is Universal Basic Income? Universal Basic Income (sometimes called Unconditional Basic Income, Citizens Income or just Basic Income) is a proposed economic system in which all adults within the economy receive a guaranteed basic income irrespective of whether they have a job or not.