Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 36,
  • Issue 19,
  • pp. 4527-4534
  • (2018)

Single Sideband Signals for Phase Noise Mitigation in Wireless THz-Over-Fibre Systems

Open Access Open Access

Abstract

In future photonic-based THz backhaul links, integrating the optical local oscillator (LO) in a remote antenna unit can be beneficial in terms of optical bandwidth efficiency and higher compatibility with passive optical networks. In such a scenario, two approaches can be used to reduce the high phase noise associated with free-running lasers: 1) baseband (BB) signals & carrier recovery, and 2) single sideband (SSB) signals & envelope detection. In this paper, we compare the performance of the two approaches for various optical LO linewidths using 5 GBd 16-QAM signals. We find that, for a total linewidth wider than 0.55 MHz, the SSB approach yields better results. The superior performance, however, comes at the expense of reducing the net information spectral density (ISD) of the SSB signal by 39% compared to that of the BB signal. However, using signal–signal beat interference-mitigation algorithms, an ISD only 15% lower than the BB signal ISD was sufficient to meet the FEC requirement. Given these results, we believe that the envelope detection of SSB signals is a promising solution to mitigate the phase noise problem of THz links based on free-running lasers, without excessively compromising the spectral efficiency of the system.

© 2018 CCBY

PDF Article
More Like This
4 × 128-Gb/s PDM-DMT signal transmission over 1440-km SSMF with high phase noise tolerance

Cai Li, Ming Luo, and Xiang Li
Opt. Express 26(23) 30901-30910 (2018)

Direct detection of polarization multiplexed single sideband signals with orthogonal offset carriers

Yixiao Zhu, Mingxuan Jiang, and Fan Zhang
Opt. Express 26(12) 15887-15898 (2018)

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.


Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved