Abstract
In this paper, the performance of Zero Padding Orthogonal Frequency Division Multiplexing (ZP-OFDM) on intensity modulation-direct detection (IM-DD) multimode fiber (MMF) links is assessed by means of numerical simulations. The performance of ZP-OFDM is compared to classical Cyclic Prefixed form of OFDM (CP-OFDM) which is known to offer a limited performance in terms of symbol recovery in subcarriers suffering severe fading. Simulations results show that ZP-OFDM is able to reach 29 Gbps in 99.5% of all installed MMF links up to 600 meters compared to 14 Gbps for CP-OFDM when a 64 points fast Fourier transform (FFT) size is used. The use of ZP-OFDM makes it possible to increase the link length up to 1200 and 2400 m with a 25 Gbps data rate if the FFT sizes are increased to 128 and 256 points, respectively; whereas the CP-OFDM scheme will offer a maximum data rate of 10 Gbps in both cases. ZP-OFDM can be an alternative to adaptive loading OFDM schemes without the need of a negotiation between transmitter and receiver, reducing the system deployment complexity and increasing the flexibility in scenarios with multiple receivers.
Highlights
Multimode Fibers (MMFs) are widely deployed in local area networks and optical interconnects thanks to their lower cost and easier installation and maintenance when compared to single mode fibers
In this paper, the performance of Zero Padding Orthogonal Frequency Division Multiplexing (ZP-OFDM) on intensity modulationdirect detection (IM-DD) multimode fiber (MMF) links is assessed by means of numerical simulations
Simulations results show that ZPOFDM is able to reach 29 Gbps in 99.5% of all installed MMF links up to 600 meters compared to 14 Gbps for Cyclic Prefixed form of OFDM (CP-OFDM) when a 64 points fast Fourier transform (FFT) size is used
Summary
Multimode Fibers (MMFs) are widely deployed in local area networks and optical interconnects thanks to their lower cost and easier installation and maintenance when compared to single mode fibers. Other proposed techniques to increase the available data rate are based on the partial modal launching technique [5] which has proven to be effective in stabilizing bandwidth values of the MMF's, graded index specially, but in practice it is difficult to maintain these modal distribution conditions along installations if the link comprises several connectors. AMO-OFDM has been shown to achieve 35 Gbps on 99.5% of currently installed 300 m long MMF links with IM-DD (intensity modulation-direct detection) modulation [9]. These results were obtained by means of simulation based on a previously proposed statistical model for a dispersive MMF link [10].
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