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Optimum noise performance of optical amplifiers

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1 Author(s)
H. A. Haus ; Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA

The concept of noise figure F and noise measure M applicable to radio frequency and microwave amplifiers is reviewed and extended to cover optical amplifiers. Two noise figures are defined in the optical regime: one gives the ASE output, while the other gives the ratio of signal-to-noise ratios at the input and output. In the quantum regime, the lower limit on these optimum values is set by a generalization of Heisenberg's uncertainty relation. A Raman back-pumped fiber link with post-amplification with an erbium-doped fiber amplifier is used to illustrate the use of noise measure

Published in:

IEEE Journal of Quantum Electronics  (Volume:37 ,  Issue: 6 )