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THE EFFECT OF CHROMATIC AND POLARIZATION MODE DISPERSIONS ON THE DISPERSION LENGTH UNDER THE INFLUENCE OF PHASE CROSS-MODULATION
Eduard L. Portnov, Head of the Department DTE, Doctor of Technical Sciences, MTUCI, Moscow, Russia
Rabenandrasana Jocelin, graduate student, MTUCI, Toliara, Madagascar, rjoce3tul@gmail.com
Abstract
By increasing the transmission rate and the length of the regeneration or amplifier section, two important parameters limit this length: attenuation and dispersion. By the transition to higher transmission rate above 10 Gbit/s except chromatic dispersion becomes heavily influence is Polarization mode dispersion, especially when the influence of nonlinear effects, such as phase cross-modulation, increases. Phase cross-modulation limits transmission and depends on a number of factors: transmission speed, optical power, number of channels, modulation format and interchannel spacing. This influence can be reduced or limited by the choice of optical fiber, the choice of modulation format, the choice of the optimal interchannel spacing, the dispersion solution, and electronic equipment. The recent advances in coherent digital signal processing have shifted the paradigm of fiber-optic communication, making it possible to attenuate the effects of linear effects such as chromatic and polarization mode dispersion. However, with phase-cross-modulation effects, some difficulties arise. Chromatic dispersion interacts with a nonlinear coefficient n2/Aeff in the direction of deteriorating system performance caused by nonlinear optical effects. The results of such interactions will be reflected in the dispersion length. This article proposes a method for determining the dispersion length under the influence of chromatic and polarization mode dispersions with a strong effect of phase cross-modulation and show how much this length will change with increasing transmission speed and number of channels.
Keywords: chromatic dispersion, polarization mode dispersion, dispersion length, phase cross-modulation, phase sift.
References
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Information about authors:
Eduard L. Portnov, Head of the Department DTE, Doctor of Technical Sciences, MTUCI, Moscow, Russia
Rabenandrasana Jocelin, graduate student, MTUCI, Toliara, Madagascar