57 Dispersion Compensation Techniques: A Comprehensive Review
Riya Sinha, Kumar Amit, Swati Garg, Tyagi, Riya Sinha, Amit Kumar Garg, Swati Tyagi
Optical fiber is one of the most important media used for communication. It offers high potential bandwidth and flexibility for high bit-rate transmission. However, their performance slows down due to some parameters like dispersion, attenuation, scattering and unsynchronized bit pattern. In long haul applications, dispersion is the main parameter which needs to be compensated in order to provide high level of reliability of service (ROS). Dispersion causes pulse broadening and pulse distortion, thus degrading the performance of the optical fiber. Dispersion compensation in optical fiber communication system has become a topic of great importance because any presence of dispersion might cause inter-symbol interference (ISI) leading to signal degradation.It is the most important and challenging aspect of the optical fiber communication to maintain a high optical SNR for good quality of the signal. There are various methods for dispersion compensation. Although dispersion compensating fiber is a reliable and mature technology but it gives high insertion loss and introduce non-linear distortion when the input power is high. Consequently other techniques such as Electronic Dispersion Compensation, Fiber Bragg Grating Dispersion Compensation and dispersion compensation using digital filter are also in use.
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