Experimental Demonstrations of Hybrid OFDM-Digital Filter Multiple Access PONs

作者：Wei Jin, Zhuqiang Zhong, Jiaxiang He, Abdulai Sankoh, R. P. Giddings, Yanhua Hong, I. Pierce, Maurice O’Sullivan, Charles Laperle, J. Lee, G. Mariani, Tim Durrant, Jianming Tang · 发表于：IEEE Photonics Technology Letters · 年份：2020 · DOI：10.1109/lpt.2020.2995072 · 被引用次数：12 · 研究领域：Optical Network Technologies、Advanced Photonic Communication Systems、Advanced Fiber Optic Sensors

Hybrid OFDM-digital filter multiple access (OFDM-DFMA) PONs exploit software configurable digital shaping filters in ONUs to multiplex multiple gapless OFDM channels at different radio frequencies and utilize a single FFT operation-based pipelined DSP procedure in the OLT to simultaneously de-multiplex/demodulate all OFDM signals from various ONUs without requiring any digital matching filters. In this letter, aggregated raw 30Gbit/s over 25km multipointto-point upstream signal transmissions of IMDD OFDM-DFMA PONs are experimentally demonstrated for the first time. Experimental results show that a reduction in ONU-embedded digital filter length from 256 to 16 just decreases the receiver sensitivity by3.5 dB (>5.5 dB) ONU launch power dynamic range is also achievable for an aggregated upstream transmission raw capacity of 28.12Gbit/s (23.43Gbit/s).