光纤供能水下摄像原型系统
A Power-Over-Fiber Underwater Camera Prototype System

为实现供电安全性高的水下长距离实时摄像，建立了光纤供能水下摄像系统。基站激光器发射的光通过62.5 μm多模光纤传输至远端，经过光伏能量器为远程摄像机和光纤通信单元供电。通过波分复用技术在一根单模光纤上实现基站控制系统与摄像机的双向通信，控制系统通过单模光纤发送摄像指令，摄像机将获取的实时图像由单模光纤传回基站。实验采用功率1.95 W、波长830 nm的光纤激光器和510 m长的多模光纤，在远端获取456 mW电功率，实现了640 × 480分辨率图像的实时传输。光纤供能水下摄像系统通过光纤输能和通信，具有无源、电绝缘、抗电磁干扰和传输线质量轻等优点，可实现长期、实时和长距离摄像，适用于海底观测网、油气资源勘探平台、油气管道传输和海洋工程作业等领域的水下视频监测。
A power-over-fiber underwater camera prototype system is established to obtain the real time underwater image over long distance with high power supply security. Laser power at a base station is transmitted over a 62.5 μm multimode fiber and provides the electric power for the remote camera and optical fiber communication unit by a photovoltaic power converter. The bidirectional communication between base station control system and remote camera is realized in a single-mode fiber by wavelength division multiplexing. The control system sends a photographing instruction and then the remote camera sends back the real time image over the single-mode optical fiber. In the experiment, a 1.95 W@830 nm optical fiber laser and a 510 m multimode optical fiber were used to make 456 mW electric power available at the remote site, and 640 × 480 pixels resolution image can be transmitted back to the base station in real time. The power-over-fiber underwater camera system transmits both power and communication data in fiber. So it has the advantages of passive, electric insulating, antielectromagnetic interference and light mass of transmission lines. Furthermore, the power-over-fiber underwater camera system can implement a long term, real time and long distance underwater camera, and can be applied to seafloor observatory, oil and gas resources exploration platform, oil and gas pipeline transmission, ocean engineering for underwater video monitoring.