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).
Gross national income (GNI) is a measure of income produced by a nation.It is closely related to the gross domestic product (GDP), and includes many of the same figures.Economic organizations regularly produce rankings of nations by GNI, with various adjustments to contextualize the numbers they present, and this information is often available to the public.t is closely related to the gross domestic product (GDP), and includes many of the same figures. Economic organizations regularly produce rankings of nations by GNI, with various adjustments to contextualize the numbers they present, and this information is often available to the public.