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).
household income nnoun: Refers to person, place, thing, quality, etc. (total earnings of a family) ingresos familiares nmplnombre masculino plural: Sustantivo masculino que se usa Ãºnicamente en plural (maritates, vÃ­veres). household income is used to assess eligibility for student loans.