在分布式光纤应变传感系统中，采用的单模传感光缆在实际施工时，由于铺设环境较为复杂，往往会出现巨大的传输损耗影响测试结果。针对现有的BOTDR产品只支持单模传感光缆的情况，提出了一种光路接口，它能使现有的BOTDR 产品实现对多模光纤的测量。实验结果表明，该光路接口可以帮助 BOTDR 实现多模光纤应变测试，实验数据线性良好。该光路接口结构简单，操作方便，对扩大BOTDR的应用领域和提高对复杂铺设环境的适应能力有重大意义。%In a distributed fiber optic strain sensing system, using single-mode fiber optic cable in the actual construction of the sensor, since the laying of the environment is more complex, often have huge transmission losses affect the test results. BOTDR for existing products only support single-mode fiber optic sensing the situation, a new optical interface, which enables existing BOTDR product realization measurement of multimode fiber. Experimental results show that the optical path interface can help BOTDR realize multimode fiber strain measurement, experimental data with good linearity. The optical interface structure is simple, easy to operate, to expand applications and increase BOTDR ability to adapt to the complex environment of the laying of great significance.
展开▼
