SIMULATION STUDY OF PROPAGATION OF PULSES IN OPTICAL FIBER COMMUNICATION SYSTEMS USING SOBOLEV GRADIENT AND SPLIT-STEP FOURIER METHODS

The one-dimensional nonlinear Schrödinger equation (NLSE) has a wide range of applications in nonlinear optical and laser physics. The design of new optical systems requires analysis of the propagation characteristics of pulses in the fiber media. In this paper, the Sobolev gradient technique has been used for numerical solution of the NLSE. We show that gradients in a suitably chosen Sobolev space (Sobolev gradients) can be used in finite difference settings in a computationally efficient way to approximate the profile of a pulse given by the NLSE.

Download Full-text

A Comparative Study of SPM, XPM in Er-Yb Co-doped Fiber

10.31224/osf.io/mhy7d ◽

2021 ◽

Author(s):

ADITYA KUMAR ◽

Gausia Qazi

Keyword(s):

Optical Fiber ◽

Comparative Study ◽

Phase Modulation ◽

Communication Systems ◽

Optical Fiber Communication ◽

Optical Systems ◽

Fiber Communication ◽

Non Linear ◽

Linear Effects ◽

Co Doped

Optical fiber communication has been the most versatile and revolutionary medium of communication that has helped in connecting millions of people across the globe. These traits have seen tremendous development in the sector of optical fiber communication. There are now many desired qualities that are expected out of an optical fiber communication like large transmission capacity and a lesser amount of losses. Communication systems operating with higher transmission rates have found an essential role of non-linear fiber optics. The behaviour of light in non-linear media is dealt with non-linear optics. Cross-Phase Modulation (XPM) and Self-Phase Modulation (SPM) are a few non-linearities occurring in the optical fiber. Non-linear effects reduce the performances of optical fibers. In this paper, a comparative study of non-linear effects in Er-Yb co-doped Fiber are reviewed using simulation and the results are compared with optical systems utilizing normal fiber. Benefits of utilizing Er-Yb fiber has been demonstrated by analysing effective systems comprising the Er-Yb co-doped fiber and their ability to mitigate the non-linearities.

Download Full-text

Novel Manchester-Based Multilevel Signaling for High-Speed Optical Communication Systems

Journal of Optical Communications ◽

10.1515/joc-2018-0139 ◽

2019 ◽

Vol 0 (0) ◽

Cited By ~ 1

Author(s):

Festus Idowu Oluwajobi ◽

Nguyen Dong-Nhat ◽

Amin Malekmohammadi

Keyword(s):

Communication Systems ◽

High Speed ◽

Chromatic Dispersion ◽

Optical Fiber Communication ◽

Pulse Amplitude ◽

Calculation Model ◽

Fiber Communication ◽

Receiver Sensitivity ◽

Communication Links ◽

Dispersion Tolerance

AbstractIn this paper, the performance of a novel multilevel signaling based on Manchester code namely four-level Manchester Coding (4-MC) technique is investigated for next generation high-speed optical fiber communication links. The performance of 4-MC is studied and compared with conventional Manchester modulation and four-level pulse amplitude modulation (4-PAM) formats in terms of receiver sensitivity, spectral efficiency and dispersion tolerance at the bit rate of 40 Gb/s. The bit error rate (BER) calculation model for the proposed multilevel scheme has also been developed. The calculated receiver sensitivity and the chromatic dispersion tolerance at the BER of 10–9 of the proposed scheme are −22 dBm and 67.5 ps/nm, respectively. It is observed that, 4-MC scheme is superior in comparison to 4-PAM by 3.5 dB in terms of receiver sensitivity in back-to-back scenario. Therefore, the proposed scheme can be considered as an alternative to current 4-PAM system.

Download Full-text