根据长周期光纤光栅(LPFG)的温度和应变特性,从理论上设计了一种具有更高灵敏度的传感器.将两个具有不同包层参数和周期的长周期光纤光栅串联起来,构成光纤光栅传感器;并对其进行数值模拟,结果表明此传感器具有更高的温度和应变灵敏度,同时能实现双参数测量.对影响传感器灵敏度的因素进行了进一步分析,表明光栅包层参数、周期对灵敏度都有一定影响,在其他参数不变的情况下高阶模次的灵敏度高于低阶模次,这一结果能进一步提高灵敏度.
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