Spatially resolved equalization and forward error correction for multimode fiber links

C Argon, KM Patel, SW McLaughlin… - … . ICC 2002 (Cat. No …, 2002 - ieeexplore.ieee.org
2002 IEEE International Conference on Communications. Conference …, 2002ieeexplore.ieee.org
Multimode fiber links suffer from intermodal dispersion, which, at high data rates, produces
intersymbol interference in the received optical signal. Without signal processing or
equalization, this limits the achievable data rates. We consider the combination of a spatially
resolved equalizer (SRE)(in the optical domain) and forward error correction (FEC) to
increase the achievable data rates and reliability on these links. Our performance results
obtained with actual measured impulse responses show that SRE and FEC on a multimode …
Multimode fiber links suffer from intermodal dispersion, which, at high data rates, produces intersymbol interference in the received optical signal. Without signal processing or equalization, this limits the achievable data rates. We consider the combination of a spatially resolved equalizer (SRE) (in the optical domain) and forward error correction (FEC) to increase the achievable data rates and reliability on these links. Our performance results obtained with actual measured impulse responses show that SRE and FEC on a multimode fiber link enable a significant increase (about 2.5 times) in data rate and/or a reduction in bit error rate (BER) at relatively low cost. Furthermore, we show that improvements in data rate and reliability are generally not possible using FEC alone, making the SRE/FEC combination a cost-effective, attractive approach.
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