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Folded digital backward propagation for dispersion-managed fiber-optic transmission
1CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, USA. 2likaizhu@creol.ucf.edu
Optics Express
|April 1, 2011
Summary
Digital backward propagation (DBP) for long-haul fiber transmission can be computationally intensive. Folded DBP significantly reduces computational load for dispersion-managed systems with minimal performance impact.
Area of Science:
- Optical Communications
- Signal Processing
- Nonlinear Optics
Background:
- Chromatic dispersion and nonlinear effects dominate waveform distortion in periodically dispersion-managed systems.
- Nonlinear behavior in these systems exhibits periodic evolution within each dispersion period.
Purpose of the Study:
- To investigate computational load reduction in digital compensation of fiber nonlinearity.
- To introduce and validate a folded digital backward propagation (DBP) method for dispersion-managed transmission systems.
Main Methods:
- Approximation of accumulated nonlinear effects over multiple spans (K) by scaling nonlinearity in a single span under weak nonlinearity.
- Implementation and simulation of folded DBP for digital compensation.
Main Results:
- Folded DBP significantly reduces computational requirements for dispersion-managed transoceanic transmission systems.
- Computational load reduction can reach up to two orders of magnitude.
- Negligible performance penalty is observed with the folded DBP method.
Conclusions:
- Folded DBP offers substantial computational savings for nonlinear compensation in long-haul optical transmission.
- This method is highly effective for dispersion-managed systems, particularly in transoceanic scenarios.
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