Performance analysis of Q -factor on wavelengths and bit rates using optical solitons with dispersion management
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RESEARCH ARTICLE
Performance analysis of Q-factor on wavelengths and bit rates using optical solitons with dispersion management Apurba Adhikary1,2 • Md. Bipul Hossain1 • Tanvir Zaman Khan1,3 Sultana Jahan Soheli1 • Md. Ashikur Rahman Khan1
•
Received: 22 April 2020 / Accepted: 16 August 2020 Ó The Optical Society of India 2020
Abstract In this paper, the dispersion management using soliton pulses in optical communication system is studied. The performance of the system with and without soliton parameters in terms of Q-factor, BER, and eye diagram is also studied. The proposed system with soliton parameters provides an improvement in Q-factor value by 82.1118 dB compared to that without soliton parameters at bit rate of 20 Gbps at a wavelength of 1550 nm with minimum BER of 0. Thus, soliton pulse can be transmitted dispersion free over optical fiber due to the exact compensation between nonlinearity and group velocity dispersion. The impact of wavelengths and bit rates for the soliton system on Qfactor, BER, and eye height is also investigated. The analysis of the simulation results provides that the values of Q-factor and eye height are inversely proportional to wavelength and proportional to bit rates in the proposed system with soliton parameters. Besides, it is proposed that the soliton pulse is best suited for long-range communication system with dispersion management. Keywords Dispersion management Soliton pulse Group velocity dispersion (GVD) Self-phase modulation (SPM) Q-factor
& Apurba Adhikary [email protected] 1
Department of Information and Communication Engineering, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
2
Electronics and Communication Engineering Discipline, Khulna University, Khulna 9208, Bangladesh
3
Department of Electronics and Communication Engineering, Khulna University of Engineering and Technology, Khulna 9203, Bangladesh
Introduction The method of transferring information from one end to another by sending pulses of light through an optical fiber is called fiber-optic communication. We can see the light whose wavelength stays in the range of 400–700 nm. But for glass fiber optics, we use light in the infrared region which has longer wavelengths than visible light. We choose longer wavelengths because the attenuation of the fiber is low at longer wavelengths [1]. The pulses that launched into the fiber spread out in accord as the pulses propagate along the fiber length and results in dispersion. Dispersion limits the transmission capacity and reduces the bandwidth because the peak power of the pulse decreases and the pulse width increases. Consequently, dispersion has become a major problem at high bit rates for long-distance optical communication. Accordingly, dispersion management is needed for long-distance optical communication [2]. Optical solitons propose a solution to this problem, which retains its shape over the propagation distance [3]. The term soliton refers to any optical field that does not change during propagation becaus
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