Throughput enhancement of slow adaptive orthogonal frequency division multiple access based passive optical network uplink transmission in 20-km single fibre loopback link employing channel stabilisation

• Published in: IET optoelectronics Vol. 8; no. 6; pp. 226 - 231
• Main Authors: Jung, Sang-Min, Hong, Moon-Ki, Jung, Sun-Young, Yang, Seung-Min, Han, Sang-Kook
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 01.12.2014
• Subjects: bit rate 15 Gbit/s; channel stabilisation; Channels; distance 20 km; Dithering; Fibre; frequency 1 GHz; Frequency division multiple access; Links; OFDM modulation; Optical communication; optical fibre networks; optical network unit; optical seed carrier; passive optical network uplink transmission; passive optical networks; Rayleigh backscattering; Rayleigh scattering; reflective semiconductor optical amplifler; Semiconductor optical amplifiers; single fibre loopback link; slow adaptive orthogonal frequency division multiple access; Uplinking; bit rate 15 Gbit/s; Rayleigh scattering; frequency division multiple access; optical network unit; channel stabilisation; passive optical network uplink transmission; frequency 1 GHz; slow adaptive orthogonal frequency division multiple access; reflective semiconductor optical amplifler; single fibre loopback link; optical fibre networks; semiconductor optical amplifiers; passive optical networks; optical seed carrier; OFDM modulation; Rayleigh backscattering; distance 20 km
• ISSN: 1751-8768; 1751-8776; 1751-8776
• DOI: 10.1049/iet-opt.2013.0141

The authors have proposed and experimentally demonstrated a novel slow adaptive orthogonal frequency division multiple access (OFDMA)-based passive optical network (PON) uplink transmission scheme using a 1-GHz reflective semiconductor optical amplifier operating as an optical network unit (ONU) in combination with Rayleigh backscattering (RB) mitigation in a 20-km single fibre loopback link. This RB mitigation, which can dramatically stabilise the channel state information and enhance the total throughput so that the OFDMA-PON transmitters can operate in the slow adaptive concept and provides beyond 15-Gbit/s uplink transmission, is achieved by employing 10-MHz low-frequency dithering of an optical seed carrier cooperating with a gain-saturated semiconductor optical amplifier at an optical line terminal. In doing so, the proposed scheme could guarantee a 50% total throughput enhancement with a proof-of-concept multiple access scenario for two ONUs, compared to its counterpart that does not apply the RB mitigation technique.