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279 km, 591 Mb/s direct detection transmission experiment using four in-line semiconductor optical amplifiers

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3 Author(s)
P. M. Gabla ; Alcatel-Cit, La Ville du Bois, France ; S. Gauchard ; I. Neubauer

The authors realized a direct detection intensity-modulation system experiment with four cascaded in-line semiconductor optical amplifiers. Using optical isolators between the amplifiers, they transmitted a NRZ 2/sup 23/-1 message over a distance of 279 km at a bit rate of 591.2 Mb/s. A comparison of this result with parallel experiments without optical isolators indicates that for a realistic implementation of long distance systems with semiconductor optical amplifiers, interamplifier optical isolators will be needed unless the residual facet reflectivity of the optical amplifiers is brought to a very low value (<1*10/sup -4/).<>

Published in:

IEEE Photonics Technology Letters  (Volume:2 ,  Issue: 8 )