Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 36,
  • Issue 3,
  • pp. 728-734
  • (2018)

Demonstration of 15-M 7.33-Gb/s 450-nm Underwater Wireless Optical Discrete Multitone Transmission Using Post Nonlinear Equalization

Not Accessible

Your library or personal account may give you access

Abstract

In this paper, we experimentally demonstrate an underwater wireless optical communication (UWOC) system using a 450-nm gallium nitride (GaN) laser and adaptive bit-power loading discrete multitone (DMT). To enhance the system capacity, a post nonlinear equalizer based on the simplified Volterra series is employed at the receiver to mitigate the nonlinear impairments of the UWOC system. By combining the adaptive bit-power loading with nonlinear equalization, 7.33-Gb/s DMT-modulated UWOC under 15-m tap water is achieved at a bit error rate below the 7% hard-decision forward error correction (FEC) limit 3.8 × 10–3. The electrical signal bandwidth is 1.25 GHz, which corresponds to an electrical spectrum efficiency of ∼6 bit/s/Hz. The capacity-distance product reaches 109.95 Gb/s-m in a single channel UWOC system with tap water. Compared with the linear equalization case, the system capacity at the FEC limit for 15-m underwater transmission is improved by ∼18% with the nonlinear equalization. Furthermore, the impact of turbidity on the performance of UWOC system is investigated by measuring the signal-to-noise ratio (SNR) under different suspension concentrations of Al(OH)3 and Mg(OH)2. The results show that significant SNR gains (>3 dB for transmission distance up to 11 m) can be obtained by the nonlinear equalization over a wide range of water turbidity levels representing “clear ocean,” “coastal ocean,” and “harbor water,” which demonstrates the robustness of the proposed scheme in various ocean environments.

© 2017 IEEE

PDF Article
More Like This
16.6 Gbps data rate for underwater wireless optical transmission with single laser diode achieved with discrete multi-tone and post nonlinear equalization

Chao Fei, Xiaojian Hong, Guowu Zhang, Ji Du, Yu Gong, Julian Evans, and Sailing He
Opt. Express 26(26) 34060-34069 (2018)

100-m/3-Gbps underwater wireless optical transmission using a wideband photomultiplier tube (PMT)

Chao Fei, Yuan Wang, Ji Du, Ruilin Chen, Nanfei Lv, Guowu Zhang, Jiahan Tian, Xiaojian Hong, and Sailing He
Opt. Express 30(2) 2326-2337 (2022)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


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