Laming, R.I., Gnauck, A.H., Giles, C.R., Zervas, M.N. and Payne, D.N.
High-sensitivity two-stage erbium-doped fiber preamplifier at 10 Gb/s
IEEE Photonics Technology Letters, 4, (12), . (doi:10.1109/68.180572).
We have demonstrated an optical preamplifier with a record sensitivity of -38.8 dBm (102 photons/bit) at 10Gbit/s. When employed in a practical link without an input isolator the sensitivity is only slightly degraded to -37.6dBm (135 photons/bit) by input coupling losses and feedback due to Rayleigh backscattering in the transmission fibre.
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