Abstract

Amplified spontaneous emission (ASE) and Rayleigh backscattering (RBS) in strongly pumped fiber amplifiers are studied, employing a rate equation model. Approximate expressions for the ASE and RBS, as well as for the amplifier noise figure are derived, based on approximate analytical expressions for the amplified signal, which are valid for both three-level and four-level systems. Numerical examples for rare-earth-doped fibers, show good agreement between these approximate expressions and the exact numerical solutions for strong pumping and for injected signals which are not too weak.

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  1. E. Desurvire and J. R. Simpson, "Amplification of spontaneous emission in erbium doped single mode fibers," J. Lightwave Technol., vol. 7, pp. 835-845, 1989.
  2. M. J. F. Digonnet and K. Liu, "Analysis of a 1060-nm Nd : SiO2 superfluorescent fiber laser," J. Lightwave Technol., vol. 7, pp. 1009-1015, 1989.
  3. M. J. F. Digonnet, "Theory of superfluorescent fiber laser," J. Lightwave Technol., vol. 4, pp. 1631-1639, 1986.
  4. L. Zenteno, "High-power double-clad fiber lasers," J. Lightwave Technol., vol. 11, pp. 1435-1446, 1993.

J. Lightwave Technol. (4)

E. Desurvire and J. R. Simpson, "Amplification of spontaneous emission in erbium doped single mode fibers," J. Lightwave Technol., vol. 7, pp. 835-845, 1989.

M. J. F. Digonnet and K. Liu, "Analysis of a 1060-nm Nd : SiO2 superfluorescent fiber laser," J. Lightwave Technol., vol. 7, pp. 1009-1015, 1989.

M. J. F. Digonnet, "Theory of superfluorescent fiber laser," J. Lightwave Technol., vol. 4, pp. 1631-1639, 1986.

L. Zenteno, "High-power double-clad fiber lasers," J. Lightwave Technol., vol. 11, pp. 1435-1446, 1993.

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