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Gain limit in erbium-doped fiber amplifiers due to internal Rayleigh backscattering

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3 Author(s)
Hansen, S.L. ; Jydsk Telefon, Aarhus, Denmark ; Dybdal, K. ; Larsen, C.C.

A very high gain of 51 dB in a single Er-doped fiber is reported. A significant amount of amplified Rayleigh backscattering is also observed. This is predicted to impose an upper limit of 57-70 dB of achievable gain for the investigated fibers. By the insertion of an isolator, a gain of 54 dB is observed.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:4 ,  Issue: 6 )