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Modeling Cladding-Pumped Er/Yb Fiber Amplifiers

✍ Scribed by George C. Valley

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
236 KB
Volume
7
Category
Article
ISSN
1068-5200

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✦ Synopsis

This paper presents a new computational strategy for efficient and stable modeling of rare-earth-doped fiber amplifiers and illustrates the strategy with results for a cladding-pumped erbiumrytterbium-doped fiber amplifier. The computational strategy allows arbitrary radial dependence for the optical fields and rare-earth densities, arbitrary wavelength resolution for ampli-Ž . fied spontaneous emission ASE at pump and signal wavelengths, and arbitrary numbers of rate equations with arbitrary dependence on groundand excited-state number density. Numerical results are presented for cladding-pumped ErrYb-doped fiber amplifiers that illustrate how to reach the conversion efficiency limited by the quantum defect, how power conversion and the intensity of the ASE depend on operating wavelength, and how secondary loss mechanisms such as distributed loss, upconversion, and pairingrclustering affect the efficiency of the amplifier.

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