High-sensitivity two-stage erbium-doped fiber preamplifier at 10 Gb/s
- 1 December 1992
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 4 (12) , 1348-1350
- https://doi.org/10.1109/68.180572
Abstract
An optical preamplifier with a record sensitivity of -38.8 dBm (102 photons/bit) at 10 Gb/s has been demonstrated. When the amplifier is employed in a practical link without an input isolator, the sensitivity is only slightly degraded to -37.6 dBm (135 photons/bit) by input coupling losses and feedback due to Rayleigh backscattering in the transmission fiber. It is predicted that this penalty can be reduced to 0.15 dB with an improved isolator in the composite EDFA.Keywords
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