Multifunctional difluoroboron β-diketonate-based luminescent receiver for a high-speed underwater wireless optical communication system

Yue Wang, Jian Xin Wang, Omar Alkhazragi, Luis Gutiérrez-Arzaluz, Huafan Zhang, Chun Hong Kang, N. G. Tien Khee, Osman M. Bakr, Omar F. Mohammed, Boon S. Ooi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The last decade has witnessed considerable progress in underwater wireless optical communication in complex environments, particularly in exploring the deep sea. However, it is difficult to maintain a precise point-to-point reception at all times due to severe turbulence in actual situations. To facilitate efficient data transmission, the color-conversion technique offers a paradigm shift in large-area and omnidirectional light detection, which can effectively alleviate the étendue limit by decoupling the field of view and optical gain. In this work, we investigated a series of difluoroboron β-diketonate fluorophores by measuring their photophysical properties and optical wireless communication performances. The emission colors were tuned from blue to green, and >0.5 Gb/s data transmission was achieved with individual color channel in free space by implementing an orthogonal frequency-division multiplexing (OFDM) modulation scheme. In the underwater experiment, the fluorophore with the highest transmission speed was fabricated into a 4×4 cm2 luminescent concentrator, with the concentrated emission from the edges coupled with an optical fiber array, for large-area photodetection and optical beam tracking. The net data rates of 130 Mb/s and 217 Mb/s were achieved based on nonreturn- to-zero on-off keying and OFDM modulation schemes, respectively. Further, the same device was used to demonstrate the linear light beam tracking function with high accuracy, which is beneficial for sustaining a reliable and stable connection in a dynamic, turbulent underwater environment.

Original languageEnglish (US)
Pages (from-to)32516-32528
Number of pages13
JournalOptics Express
Volume31
Issue number20
DOIs
StatePublished - Sep 25 2023

Bibliographical note

Publisher Copyright:
© 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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