基于半导体激光器的水下高速无线光通信系统设计

发布时间：2018-03-09 22:25

本文选题：水下　切入点：激光　出处：《中国海洋大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着高分辨率摄像机与高分辨率声纳在水下探测领域的广泛普及，它们对数据传输速率的要求也越来越高，在传统水下通信领域，主要采用的手段是水声通信，而传统的声学通信由于固有频率太低，无法满足高清视频与高分辨率数据实时传输的要求。由于电磁波在海水中存在快速衰减的特性，无法使用其作为信息传输的载体。高速开关的发光二极管，激光二极管产品由于其价格低廉，能耗低，被广泛被应用在光通信领域，在无线光通信方向，，利用大气中的红外窗口，自由空间光通信（FSO）技术被广泛应用在监控与安防领域。在深海探测领域，传统通信方式无法满足大数据量与高数据传输速率的通信要求，与大气信道相似，在海水信道中也存在一个蓝绿光的透光窗口，基于以上原因，我们提出了一套通过使用蓝绿激光作为信息传输载体的水下高速无线通信系统解决方案。本文针对水下机器人与传感器的高速数据传输需求，设计了一套基于488nm低功耗激光二极管发射器与光电倍增管接收器的的水下高速数据传输系统，本文主要做了如下几项工作：首先，分析了光在在水下的传输特点与在传播过程中造成误差的主要原因。然后设计了一套基于488nm激光二极管与光电倍增管的单工水下无线激光通信系统，对装置的各项参数进行设计，使其满足基本通信要求。本论文的主要内容为对激光通信系统在实际应用中的实用性进行验证，为此分别进行了数字字符信号，模拟音频信号，模拟视频信号等不同信号格式的数据传输，并对实验结果进行分析。在论文的最后，对实验进行总结并对未来的工作进行展望。
[Abstract]:With the high resolution camera with high resolution sonar detection in the field of underwater widespread, they require the rate of data transmission is more and more high, in the field of traditional underwater communication, mainly by means of acoustic communication, acoustic communication and traditional due to the inherent frequency is too low, can not meet the real-time transmission of high-definition video with high resolution data requirements. Because of the characteristics of rapid attenuation of electromagnetic wave in the sea, which cannot be used as the carrier of information transmission. The light emitting diode high speed switching diode laser products, because of its low price, low energy consumption, is widely used in the field of optical communication, wireless optical communication, the use of infrared window in the atmosphere, free space optical communication (FSO) technology has been widely used in monitoring and security fields. In the field of deep-sea exploration, the traditional means of communication can not meet the large amount of data and high data transmission The communication requirement of speed is similar to that of atmospheric channel. There is also a blue and green light transmitting window in seawater channel. For these reasons, we propose a solution of underwater high-speed wireless communication system by using blue-green laser as the carrier of information transmission.
Aiming at the demand of high-speed data transmission for underwater robot and sensor, a set of underwater high-speed data transmission system based on 488nm low power laser diode transmitter and photomultiplier receiver has been designed.
First, analyze the main reasons of the transmission characteristics of light in the under water and in the dissemination process. Then the error caused by the design of a 488nm based laser diode and photomultiplier tube simplex underwater wireless laser communication system, the parameters of the device were designed, which can meet the basic requirements of communication. The main content of this paper in order to verify the practicability of the laser communication system in practical application, so we carry out digital character signal, analog audio signal, data transmission of analog video signal in different signal format, and to analyse the experimental results.
At the end of the paper, the experiment is summarized and the future work is prospected.

【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1;TN248.4

【参考文献】