4.5 Article

Performance Evaluation of Underwater Wireless Optical Communication System by Varying the Environmental Parameters

期刊

PHOTONICS
卷 8, 期 3, 页码 -

出版社

MDPI
DOI: 10.3390/photonics8030074

关键词

underwater wireless optical communication; bit error rate; temperature; turbulence; artificial seawater; environmental factors

类别

向作者/读者索取更多资源

Underwater wireless optical communication is a promising technology for high-speed transmission, with research focusing on system performance under environmental factors like flow turbulence, temperature variation, and simulated seawater. Experimental results show differences in transmission performance under different environmental parameters, highlighting the impact of factors such as turbulence, temperature, and simulated seawater on transmission distance and quality.
Underwater wireless optical communication (UWOC) has been considered a promising technology for high-speed underwater transmission. Some Gb/s level UWOC systems applying visible light have been demonstrated with a transmission distance of several meters or more. Many of the previous works focus on the advanced technologies to push the systems' capacity-distance performance. However, practical environmental factors issue such as flow turbulence and temperature variation are seldom studied through specific statistical/theoretical models. In this paper, a UWOC system using a 450 nm blue light laser source was set up using a 1.5-m water tank with mirrors located on both sides for single or multiple reflections corresponding to different transmission distances. The blue laser was modulated by a 1.25 Gbps NRZ-OOK format with PRBS of 7, 24 or 31, respectively, for system performance comparison. The bit error rate (BER) values were measured in 1.5, 3.0 and 6 m, respectively, for system evaluation. At room temperature, the BER value was down to 10 x 10(-8) for a 1.25 Gbps data rate in a 6 m transmission. Then, the UWOC transmission system experiment was carried out under several environmental parameters such as temperature, turbulence, artificial seawater by adding salt to simulate practical application in river or sea. When a submerged motor with an output of 1200 L/h was used as a water flow turbulence source, the impact to BER and transmission quality was negligible. For the temperature change issue, the experiment shows that around the original temperature of 25 degrees C had the best BER as compared to other temperature ranges from 10 to 50 degrees C. For artificial seawater issues by adding salt to simulate the real seawater environment. The transmission distance was only 3-m instead of 6 m, mainly due to particle scattering and water disturbance. With the motor pump on, the power penalty was 1 dB at 10 x 10(-8) BER when compared to the motor pump off.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据