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).
Key TermsKey Terms. â¢ national income accounting: a system. economists use to collect and organize. macroeconomic statistics on production, income, investment, and savings. â¢ gross domestic product: the dollar value of all. final goods and services produced within a. countryâs borders in a given year. â¢ intermediate goods: products used in the.