海洋环境下新型光纤传感器关键问题研究

海洋观测已进入高时空分辨率立体观测阶段，特别是对海洋物理、化学要素的高分辨率原位观测，是世界科技发展前沿和国家重大需求。光纤传感具有本征绝缘、耐腐蚀、易复用组网等优点，更适于海洋环境，但还存在单传感器精度、范围和稳定性受限、原位监测难，多传感器海洋影响机理不清等问题。针对上述瓶颈，本项目拟系统开展海洋新型光纤传感器关键问题研究，研制适应于海洋环境的新型光纤温度、压力、溶解氧和pH传感器。探索光纤微腔干涉温度和压力传感机理，揭示海洋环境微腔干涉光场耦合规律；探索基于光纤端面修饰的荧光光纤溶解氧和pH传感机制，揭示海洋环境化学传感器敏感膜传感增强和调控规律；探索海洋环境多传感参数补偿机制，建立环境参数干扰补偿算法；探索海洋光纤传感器网络构建方法，进行光纤传感器海洋适应性试验。项目的研究对海洋环境立体观测的发展具有重要的意义，有望构建基于光纤传感器的精细化、高时空分辨率的“透明海洋”观测网。

Ocean observation has entered the stage of high spatial-temporal resolution stereo observation, especially the high-resolution in-situ observation of ocean physical and chemical elements, which is the frontier of world scientific and technological development and a major national demand. Optical fiber sensing has the advantages of intrinsic insulation, corrosion resistance and easy networking. It is more suitable for ocean environments. However, there are still some problems such as single sensor accuracy, range, and stability limitations, difficult in-situ monitoring, and unclear multi-sensor ocean impact mechanism. In view of the above bottleneck, this project intends to systematically carry out basic research on new ocean optical fiber sensors. The aim of the project is to achieve new ocean sensors of temperature, pressure, dissolved oxygen and pH value. The multi-parameter sensing mechanism of optical fiber micro-cavity temperature and pressure sensors will be explored and the coupling mechanism of the optical field in the marine environment will be revealed. The fluorescence fiber dissolved oxygen and pH sensing mechanism based on fiber end modification will be explored and the signal enhancement and regulation of the sensing membrane will be revealed. The compensation mechanism for marine parameters will be explored and the corresponding compensation algorithm will be established. The ocean optical fiber sensor network will be studied. The new four types of optical fiber sensors will be tested in ocean. The research of the project is of great significance for promoting the development of marine environmental stereoscopic observation. It is expected to build a transparent ocean network based on the refined, high-spatial-temporal resolution of the optical fiber sensors.