Erbium-Doped Fiber Amplifiers
K. Thyagarajan*, Department of Physics, Indian Institute of Technology Delhi, New Delhi, India
1 INTRODUCTION
In traditional long-distance optical fiber communication systems, compensation of loss and dispersion is usually accomplished by using electronic regenerators in which the optical signals are first converted into electrical signals, then processed in the electrical domain, and then reconverted into optical signals. Whenever the system limitation is due to insufficient optical power rather than dispersion, amplification of the signal and optical amplifiers can indeed perform this job. Optical amplifiers are devices that amplify the incoming optical signals in the optical domain itself without ...
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