温度稳定型光纤声波微传感器研制

Optical fiber acoustic sensor has been attracted considerable research interests for its potential applications in industry and military because of their particular characteristics, such as high sensitivity, small size, and long distance signal transmission for remote operation, etc. However, optical fiber acoustic sensor always suffers from serious temperature cross-sensitivity. To solve this problem, a low-temperature cross-talk optical fiber acoustic sensor based on 2-dimensional spatial light modulation has been demonstrated. The acoustic is detected by using the 2-dimensional spatial light modulation, and the temperature cross-sensitivity is eliminated through the special acoustic phase plate. The project includes: researching the 2-dimensional spatial light modulation for acoustic detection; investigating the special acoustic phase plate for low-temperature cross-talk; designing the optimized sensor structure for two-wave interferometer; building the test platform for analyzing the characteristic of the sensor. The development of the proposed optical fiber acoustic sensor would provides the principle and experimental date for the real applications.

光纤声波传感器具有灵敏度高、体积小、抗电磁干扰、传输损耗低等优点，是继电容式和电压式声波传感器之后的新一代探测设备，已经引起广泛关注。其中, 干涉式光纤声波传感器具有较高的灵敏度，但是温度干扰是制约其实际发展的重要因素。针对这一问题，本项目提出新型的基于二维空间光调制的温度稳定型光纤声波传感技术。光纤声波传感器通过二维空间光调制原理拾取声波信息，通过声波可调相位板的特殊“凸”字型结构建立温度稳定机制。项目主要内容包括：研究二维空间光调制的声波传感机理,建立基于“凸”字型结构声波可调相位板的温度稳定机制，设计空间正交相位干涉的传感器匹配结构,搭建测试平台对光纤声波传感器样机的性能进行测试，分析其声波响应性能及温度稳定效果。本项目的研究将为光纤声波传感技术的实际应用提供理论基础及实验数据。

光纤声波传感器兼具高灵敏度、微小体积、远程探测等优点，在工业、军事等领域具有广泛应用前景。然而，温度干扰是制约光纤声波传感器实际发展的重要因素。针对这一问题，本项目提出新型的基于二维空间光调制的温度自稳定型光纤声波传感技术。光纤声波传感器通过二维空间光调制原理拾取声波信息，通过声波可调相位板的特殊“凸”字型结构建立温度自稳定机制。项目主要内容包括：研究二维空间光调制的声波传感机理,建立基于“凸”字型结构声波可调相位板的温度自稳定机制，设计空间正交相位干涉的传感器匹配结构,搭建测试平台对光纤声波传感器样机的性能进行测试，分析其声波响应性能及温度自稳定效果。本项目的研究将为光纤声波传感技术的实际应用提供理论基础及实验数据。