基于干涉型微光纤器件的海水温盐压传感方法研究进展

Development of Seawater Temperature, Salinity and Pressure Sensing Based on Interferometric Microfiber Device

微光纤是直径在微米量级的一种新型光纤,近年来得到了人们的广泛关注。首先,介绍了微光纤的传感原理、导波特性及传播常数的计算方法,并总结了可以估算干涉型微光纤传感器灵敏度的通用表达式。然后,介绍了微光纤的常用制备方法及典型干涉型微光纤传感器件,如微光纤环形谐振腔、微光纤方向耦合器、微光纤同轴马赫-曾德尔干涉仪(MZI)在海水温盐压传感探测中的应用,并重点介绍了微光纤同轴MZI的封装方法、环境适应性和响应时间。最后,对目前研究中存在的问题及未来发展趋势进行了总结及展望。

Microfiber is a kind of novel fiber with diameter in the micrometer level, which aroused people’s widespread attention in recent years. In this paper, first, sensing principle, guiding properties, and the calculation method of propagation constant of the microfiber are introduced, and the general expression used for estimating the sensitivity of interferometric microfiber sensor is summarized. Then, the common preparation methods of microfiber and typical interferometric microfiber sensors used in temperature, salinity and pressure sensing are introduced, such as microfiber ring resonator, microfiber directional coupler and microfiber coaxial Mach-Zehnder interferometer(MZI). Secondly, it focuses on the packaging method, environmental adaptability and response time of the microfiber coaxial MZI. Finally,the existing problems and the trend of future development of these sensors is summarized and prospected.