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Analysis the Performance of Coded WSK-DWDM Transmission System

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Author(s): Bobby Barua

Journal: International Journal of Engineering and Technology
ISSN 2049-3444

Volume: 2;
Issue: 12;
Start page: 1974;
Date: 2012;
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Keywords: Dense Wavelength Division Multiplexing (DWDM) | four-wave mixing (FWM) | dispersion shifted fiber (DSF | signal to noise ratio (SNR) | bit error rate (BER) | Multiple Ary(M-ary).

ABSTRACT
Dense Wavelength Division Multiplexing (DWDM) is the system with more than eight active wavelengths per fiber. Again high data rates as well as long spans between amplifiers in a chain require high optical power per channel to satisfy the signal to noise ratio (SNR) requirements. So the DWDM systems with long repeater-less spans, the simultaneous requirements of high launched power and low dispersion fibers lead to the generation of new waves by four-wave mixing (FWM), which degrades the performance of a multi-channel transmission system. Several methods have been proposed to mitigate the effect of FWM crosstalk. All these works are performed considering only binary WSK scheme. Although M-ary WSK (M>2) schemes have higher spectral efficiency than binary WSK system. Again, the BER performances for M-ary WDM system are not satisfactory with the effect of FWM. Therefore, in this paper we include the effect of FWM on the performance of an M-ary WDM system and try to mitigate the effect by employing the energy efficient convolution code in a normal dispersive fiber as well as in a dispersion shifted fiber (DSF).

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