Exploiting polarisation state for beyond 10 Gbps underwater optical wireless data transmission in hostile channel conditions

Callum T. Geldard; Egecan Guler; Iain M. E. Butler; Alex Hamilton; Wasiu O. Popoola

doi:10.1117/12.2650066

15 March 2023 Exploiting polarisation state for beyond 10 Gbps underwater optical wireless data transmission in hostile channel conditions

Callum T. Geldard, Egecan Guler, Iain M. E. Butler, Alex Hamilton, Wasiu O. Popoola

Author Affiliations +

Proceedings Volume 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII; 124290X (2023) https://doi.org/10.1117/12.2650066
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

This paper experimentally demonstrates the performance of subcarrier intensity modulation with polarisation division multiplexing (SIM-PDM) in a range of different water conditions. Underwater optical wireless communication (UOWC) is an emerging technology that offers high speed, low latency links over link distances in the order of metres. However, the effects of the UOWC channel present a challenge when designing a reliable link. These include: turbulence induced fading, which causes fluctuations in the received signal amplitude; particulate absorption, which causes an attenuation in the received optical power; and scattering, which causes spatial and temporal dispersion in the received signal. The SIM technique offers a resilience to turbulence compared to the state of the art on-off keying scheme, whilst additionally offering the potential for multi-level modulation orders – and therefore increased data rates – by encoding data on the signal phase as well as amplitude. In this work, PDM is used in conjunction with SIM to increase the spectral efficiency by separately modulating data across two orthogonal polarisation states. As long as these signals propagate identical channels, the polarisation states are maintained. Here, two orthogonally polarised laser beams are independently modulated with quadrature amplitude modulation (QAM), implemented via SIM to form the QAM-SIM-PDM technique. The performance of this technique is evaluated in terms of bit error rate and the maximum achievable data rate in clear, turbulent, and turbid water conditions. It is shown that data rates in excess of 10 Gbps are achievable using the QAM-SIM-PDM technique.

Citation Download Citation

Callum T. Geldard, Egecan Guler, Iain M. E. Butler, Alex Hamilton, and Wasiu O. Popoola "Exploiting polarisation state for beyond 10 Gbps underwater optical wireless data transmission in hostile channel conditions", Proc. SPIE 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII, 124290X (15 March 2023); https://doi.org/10.1117/12.2650066

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
4 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Polarization

Turbidity

Data transmission

Turbulence

Modulation

Quadrature amplitude modulation

Technology

Show All Keywords

Keywords/Phrases

Search In:

Publication Years