基于COMSOL的非本征法珀光纤受力仿真分析

Force Simulation Analysis of Extrinsic Fiber Fabry-Perot Based on COMSOL

为了研究非本征光纤法珀传感器(EFPI)的压力应变,对非本征法珀光纤传感器进行了基于COMSOL的有限元仿真分析.结果表明:在光纤传感器的表面施加载荷时,不同腔长的非本征法珀光纤皆为中间部位受力最大,两侧逐渐变小;对比计算得出,腔长越短受力变化越大,灵敏度越高.此结论可为后续非本征法珀光纤传感器的制备及应变试验提供参考.

In order to study the pressure strain of Extrinsic Fabry-Perot Interferometric(EFPI)sensor,finite element simulation analysis based on COMSOL is carried out.The simulation results show that,when the load force is applied on the surface of the fiber sensor,the EFPI fiber with different cavity length has the maximum stress in the middle section,and the sections closing two ends gradually decrease.Comparative calculation results show that the shorter the cavity length is and the greater the stress change and the higher the sensitivity.This conclusion can provide more accurate theoretical guidance for the preparation and strain experiment of the EFPI sensor.