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 NIDS The National Income Dynamics Study (NIDS) is the first national household panel study in South Africa. It is an initiative of the Department of Planning, Monitoring and Evaluation (DPME) and is part of an intensive multi-million rand effort on the part of the government to track and understand the shifting face of poverty.