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

• Published in: Journal of lightwave technology Vol. 9; no. 9; pp. 1132 - 1135
• Main Authors: Andrekson, P.A., Olsson, N.A., Simpson, J.R., Tanbun-Ek, T., Logan, R.A., Wecht, K.W.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.1991; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Channel spacing; Circuit properties; Communication systems; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Frequency; Integrated optics. Optical fibers and wave guides; Optical amplifiers; Optical and optoelectronic circuits; Optical fiber amplifiers; Optical pulses; Pulse amplifiers; Solitons; Space vector pulse width modulation; Wavelength division multiplexing; Frequency shift; Optical telecommunication; Geometrical configuration; Long distance transmission; Experimental study; Optical circuit; Optical fiber; Optical soliton
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/50.85810

Multiwavelength soliton interaction over 10000 km in an Er/sup 3+/-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.< >