TY - JOUR
T1 - Non-line-of-sight methodology for high-speed wireless optical communication in highly turbid water
AU - Sun, Xiaobin
AU - Kong, Meiwei
AU - Alkhazragi, Omar
AU - Shen, Chao
AU - Ooi, Ee-Ning
AU - Zhang, Xinyu
AU - Buttner, Ulrich
AU - Ng, Tien Khee
AU - Ooi, Boon S.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): BAS/1/1614-01-01, KCR/1/2081-01-01, GEN/1/6607-01-01
Acknowledgements: We gratefully acknowledge the personnel at KAUST for their relentless support of this work:
Dr. Virginia Unkefer and Mr. Heno Hwang at the Publication Services and Researcher Support
Department; Mr. Muhammad Q. Popalzai, Mr. Meshal M. Abdulkareem, and Mr. Michael
Bayudan from the Central Workshop. Figure 1 was created by Heno Hwang, scientific
illustrator at KAUST.
PY - 2020/1/8
Y1 - 2020/1/8
N2 - Underwater wireless optical communication (UWOC) is an emerging technology for discovering, exploiting, and protecting various underwater resources. Due to the diverse water clarity conditions, light signals are expected to propagate in a fashion dominated by the line-of-sight (LOS) to non-line-of-sight (NLOS) regime. To fully benefit from the high capacity underwater internet that UWOC could offer, especially in the presence of turbid water, a system that obviates the stringent requirements for pointing, acquisition, and tracking (PAT) is required. Herein, we demonstrated a robust NLOS UWOC link fully relieving the requirement on PAT. Based on a system design consisting of an ultraviolet (UV) laser for enhanced light scattering and a high sensitivity photomultiplier tube (PMT), we established an NLOS link with a data rate of 85 Mbit/s and a transmission distance of 30 cm using on-off keying (OOK) in emulated highly turbid harbor water. Further, a data rate of 72 Mbit/s is still achieved when the alignment is totally lost, i.e., the pointing directions of the transmitter and receiver are parallel. A longer transmission distance up to 40 m is also envisaged. Our findings will pave the way for a practical, short-reach, NLOS UWOC link in realistic oceanic scenarios.
AB - Underwater wireless optical communication (UWOC) is an emerging technology for discovering, exploiting, and protecting various underwater resources. Due to the diverse water clarity conditions, light signals are expected to propagate in a fashion dominated by the line-of-sight (LOS) to non-line-of-sight (NLOS) regime. To fully benefit from the high capacity underwater internet that UWOC could offer, especially in the presence of turbid water, a system that obviates the stringent requirements for pointing, acquisition, and tracking (PAT) is required. Herein, we demonstrated a robust NLOS UWOC link fully relieving the requirement on PAT. Based on a system design consisting of an ultraviolet (UV) laser for enhanced light scattering and a high sensitivity photomultiplier tube (PMT), we established an NLOS link with a data rate of 85 Mbit/s and a transmission distance of 30 cm using on-off keying (OOK) in emulated highly turbid harbor water. Further, a data rate of 72 Mbit/s is still achieved when the alignment is totally lost, i.e., the pointing directions of the transmitter and receiver are parallel. A longer transmission distance up to 40 m is also envisaged. Our findings will pave the way for a practical, short-reach, NLOS UWOC link in realistic oceanic scenarios.
UR - http://hdl.handle.net/10754/660961
UR - https://linkinghub.elsevier.com/retrieve/pii/S0030401820300183
UR - http://www.scopus.com/inward/record.url?scp=85077711648&partnerID=8YFLogxK
U2 - 10.1016/j.optcom.2020.125264
DO - 10.1016/j.optcom.2020.125264
M3 - Article
SN - 0030-4018
VL - 461
SP - 125264
JO - Optics Communications
JF - Optics Communications
ER -