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Observation of collision induced temporary soliton carrier frequency shifts in ultra-long fiber transmission systems

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6 Author(s)
P. A. Andrekson ; AT&T Bell Lab., Murray Hill, NJ, USA ; N. A. Olsson ; J. R. Simpson ; T. Tanbun-Ek
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Multiwavelength soliton interaction over 10000 km in an Er3+ -doped fiber amplifier based system is studied in a fiber loop configuration. Collisions that takes place over distances significantly longer than amplification period are found to produce nonpermanent shifts of the soliton carrier frequencies, thus acting as collisions in a lossless medium. The spectral shift is found to be inversely proportional to the wavelength separation and is reduced with increasing pulse width. The effects of these unavoidable collisions will impose a limit on the minimum channel spacing in ultra-long-haul soliton based communication systems

Published in:

Journal of Lightwave Technology  (Volume:9 ,  Issue: 9 )