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The effect of turbulence on NLOS underwater wireless optical communication channels [Invited]

Chinese Optics Letters 2019年第10期17卷 80-87页

作者： Mohammed Sait Xiaobin Sun omar alkhazragi Nasir Alfaraj Meiwei Kong Tien Khee Ng Boon S.Ooi Photonics Laboratory King Abdullah University of Science and Technology (KAUST)

Conventional line-of-sight underwater wireless optical communication(UWOC)links suffer from huge signal fading in the presence of oceanic turbulence due to misalignment,which is caused by variations in the refractive index in the ***-line-of-sight(NLOS)communication,a novel underwater communication configuration,which has eased the requirements on the alignment,is supposed to enhance the robustness of the UWOC links in the presence of such *** Letter experimentally and statistically studies the impact of turbulence that arises from temperature gradient variations and the presence of different air bubble populations on NLOS optical *** results suggest that temperature gradient-induced turbulence causes negligible signal fading to the NLOS ***,the presence of air bubbles with different populations and sizes can enhance the received signal power by seizing the scattering phenomena from an ultraviolet 377 nm laser diode.

关键词： communication scattering turbulence

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A tutorial on laser-based lighting and visible light communications:device and technology [Invited]

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Chinese Optics Letters 2019年第4期17卷 19-33页

作者：郭予健欧码江隽宏沈超毛渊孙晓斌伍田祺黄文秀 Photonics Laboratory King Abdullah University of Science and Technology (KAUST)

This tutorial focuses on devices and technologies that are part of laser-based visible light communication(VLC)systems. Laser-based VLC systems have advantages over their light-emitting-diode-based counterparts, including having high transmission speed and long transmission distance. We summarize terminologies related to laser-based solid-state lighting and VLC, and further review the advances in device design and *** high-speed modulation characteristics of laser diodes and superluminescent diodes and the on-chip integration of optoelectronic components in the visible color regime, such as the high-speed integrated photodetector,are introduced. The modulation technology for laser-based white light communication systems and the challenges for future development are then discussed.

关键词： tutorial focuses technologies communication systems

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