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Digital back-propagation for nonlinearity mitigation in distributed Raman amplified links
Optics Express
|April 7, 2017
Summary
Digital back-propagation (DBP) in distributed Raman amplifiers offers 1.3 dB more gain than lumped amplifiers. This advanced technique slightly increases complexity by 25% for enhanced optical communication system performance.
Area of Science:
- Optical Communications
- Signal Processing
Background:
- Distributed Raman amplification is crucial for long-haul optical networks.
- Digital back-propagation (DBP) is a signal processing technique used to compensate for fiber impairments.
Purpose of the Study:
- To evaluate the performance of DBP in distributed Raman amplified systems.
- To compare DBP with conventional lumped amplifiers like EDFA.
- To assess the complexity of DBP in these systems.
Main Methods:
- Analytical modeling of DBP performance.
- Numerical simulations of optical communication systems.
- Complexity analysis of the DBP algorithm.
Main Results:
- DBP in distributed Raman systems provides 1.3 dB additional gain compared to lumped amplification.
- The complexity of DBP increases by approximately 25%.
Conclusions:
- Full-field DBP is a viable and effective technique for distributed Raman amplified systems.
- The performance gains outweigh the moderate increase in algorithmic complexity.