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Spectral width reduction using apodized cascaded fiber Bragg grating for post-dispersion compensation in WDM optical networks

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Abstract

This paper proposes a system that aims to reduce the spectral width, Δλ, of the optical signal at transmitter for WDM system over distance 100 km. Also, a chirped fiber Bragg grating (CFBG) at the receiver is used to compensate dispersion. The proposed system consists of four cascaded FBGs connected between light source and optical fiber. Many apodization functions are investigated to enhance the performance of the FBG in the proposed system, and Δλ is obtained at every stage and apodization function. The Q-factor and bit error rate (BER) are obtained at distances 30, 40 and 50 km. It is found that Cauchy apodization function is the best one that reduces the reflective spectral width, Δλ, and achieves a maximum Q-factor and minimum BER at distances 30, 40 and 50 km at the last stage.

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Correspondence to Ashraf A. M. Khalaf.

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Sayed, A.F., Mustafa, F.M., Khalaf, A.A.M. et al. Spectral width reduction using apodized cascaded fiber Bragg grating for post-dispersion compensation in WDM optical networks. Photon Netw Commun 41, 231–241 (2021). https://doi.org/10.1007/s11107-021-00926-y

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